Janie in Their Eyes Were Watching God and Holden Caulfield in The Catc

"Dey all useter call me Alphabet 'cause so many people had done named me different names," Janie says (Hurston 9). The nickname "Alphabet" is fitting in Zora Neale Hurston's Their Eyes Were Watching God because Janie is always changing and rearraging, never the same. Janie Crawford was constantly searching for happiness, self-realization, and her own voice. Janie dares not to fit the mold, but rather defy it to get what she wants. On the journey to find her voice, she marries three separate men and each one of these men contribute to Janie’s quest in different ways. In the beginning, the pear tree symbolizes Janie’s yearning to find within herself the sort of harmony and simplicity that nature embodies. However, that idealized view changes when Janie is forced to marry Logan Killicks, a wealthy and well-respected man whom Janie’s Nanny set her up with. Because Janie does not know anything about love, she believes that even if she does not love Logan yet, she will find it when they marry. Upon marrying Logan, she had to learn to love him for what he did, not for that infallible love every woman deserves.  After a year of pampering, Logan becomes demanding and rude, he went as far to try to force Janie to do farm work. It was when this happened that Janie decided to take a stand and run away with Joe. At this time, Janie appears to have found a part of her voice and strong will. In a way, she gains a sense of independence and realizes she has the power to walk away from an unhealthy situation and does not have to be a slave to her own husband. After moving to Eatonville and marrying Joe, Janie discovers that people are not always who they seem to be. While Joe at first seemed to be easy-going and friendly, she wa... ... stay" (Salinger 205). He is repulsed by fake people and wants to be satisfied by something real--something true he can grasp onto. Just as Janie is similar to Holden, Holden is also similar to Janie. Janie is a woman who has overcome the rules and restrictions she was given. Janie was nothing but "a rut in the road. Plenty of life beneath the surface but it was kept beaten down by the wheels" (Hurston 72). Eventually, Janie made it her purpose to rebel against this mold. By the end of the story, Janie has accomplished finding and conquering self-actualization, she has reached her enlightenment through the her marriages to Logan, Jody, and Tea Cake. It is apparant when she tells Pheoby, â€Å"You got tuh go there tuh know  there..Two things everybody's got tuh do fuh theyselves. They got tuh go tuh God, and they got tuh find out about livin' fuh theyselves" (Hurtson 183).

Chemistry- Alkanes and Alkenes

The process of naming compounds allows chemists to communicate formulae in words rather than in chemical symbols. There are, however, a few rules about naming compounds which need to be known in order to write a formula in word form or translate a compound in word form into chemical symbols. Ionic compounds If the compound is ionic, then the name of the cation (usually metal) comes first, followed by the ‘compound' name of the anion.To find the compound name of an anion, replace the end of the element's name with ‘ide'. name of cation + name of anion, suffix ‘ide' E. g. NaCl: sodium, the cation, first, followed by chlorine changed with the suffix ‘ide' = sodium chloride If the anion is polyatomic and contains oxygen, then the suffix is ‘ate'. name of cation + name of polyatomic oxygen anion, suffix ‘ate' E. g. Na2CO3: sodium, the cation, first, followed by a polyatomic group containing carbon and oxygen to form carbonate = sodium carbonate Note:E. g. MgO: magnesium, the cation, first, followed by oxygen changed with the suffix ‘ide' because oxygen is the sole ion and not part of a polyatomic group = magnesium oxide Sometimes if the compound contains hydrogen, the word ‘hydrogen' shortens to ‘bi' such as with NaHCO3, which is known as sodium hydrogen carbonate or sodium bicarbonate. Hydrogen compounds If the compound contains hydrogen and a metal, the metal comes first, followed by the word ‘hydride', to denote the hydrogen component. etal + hydride E. g. NaH: sodium, the metal, first, followed by hydrogen changed with the suffix ‘ide' = sodium hydride If the compound contains hydrogen and a non-metal and does not contain water (H2O), then the hydrogen comes first, followed by the element's name replaced with the ‘ide' suffix. hydrogen + non-metal, suffix ‘ide' E. g. HF: hydrogen first, followed by fluorine changed with the suffix ‘ide' = hydrogen fluoride If the hydrogen non-met al compound dissolves in water, it tarts with the ‘hydro' prefix, followed by the element's name replaced with an ‘ic' suffix, followed by ‘acid'. hydro(name of element, suffix ‘ic') acid E. g. HCl: hydro, then chlorine with an ‘ic' suffix, then ‘acid' = hydrochloric acid Oxygen compounds When naming ionic compounds that contain oxygen the basic rule is similar. If the compound contains hydrogen and an oxygen anion (oxyanion) and does not contain water, then hydrogen comes first, followed by the element name with the suffix ‘ate'. hydrogen + element, suffix ‘ate' E. g.HCO3: hydrogen followed by carbon with the suffix ‘ate' = hydrogen carbonate The ‘ate' rule is used for the most common or the only compound made with an oxyanion. Some compounds, however, form more than one type of compound with oxygen and the amount of oxygen will affect the prefixes and suffixes used. This occurs for all oxyanions, with or without hydrogen involved. Table 1. 1: Naming more than one type of oxygen compound Oxygen level| Prefix| Element| Suffix| A little oxygen| hypo-| | -ite| Some oxygen| | | -ite| More oxygen| | | -ate| A lot of oxygen| per-| | -ate|E. g. Chlorine forms four different oxyanions named: ClO = hypochlorite ClO2 = chlorite ClO3 = chlorate ClO4 = perchlorate The oxygen level corresponds with the relative amounts in different compounds and not necessarily the specific numbers of oxygen atoms. If an element forms just two types of oxyanion compounds, then the suffixes ‘ite' and ‘ate' will suffice. If the hydrogen oxyanion compound is dissolved in water, it forms an acid using similar rules, only the ‘ite' suffix changes to ‘ous' and the ‘ate' suffix changes to ‘ic', followed by the word ‘acid'.Table 1. 2: Naming more than one type of hydrogen oxyanion acid Oxygen level| Prefix| Element| Suffix| Acid| A little oxygen| hypo-| | -ous| | Some oxygen| | | -ous| | More oxy gen| | | -ic| | A lot of oxygen| per-| | -ic| | E. g. The above example with chlorine and oxygen plus hydrogen: HClO = hypochlorous acid HClO2 = chlorous acid HClO3 = chloric acid HClO4 = perchloric acid Covalent compounds If a compound contains two non-metals in a covalent bond, then: * the least electronegative element is named first if the compound contains hydrogen, hydrogen is named first * the number of atoms of each element is indicated by a prefix * if the first element only has one atom the prefix is not used * the name of the element has the suffix ‘ide' least electronegative + number prefix, most electronegative element, suffix ‘ide' The prefixes used to number the atoms come from Greek and are as follows: 1 = mono- or mon- 2 = di- 3 = tri- 4 = tetra- 5 = penta- | 6 = hexa- 7 = hepta- 8 = octa- 9 = nona- 10 = deca-| E. g.CO: carbon, the least electronegative atom, first, followed by the prefix ‘mon' to indicate one atom of oxygen, the most electronegativ e atom, with the suffix ‘ide' = carbon monoxide CO2 carbon, the least electronegative atom, first, followed by the prefix ‘di' to indicate two atoms of oxygen, the most electronegative atom, with the suffix ‘ide' = carbon dioxide H2O the prefix ‘di' to indicate two atoms of hydrogen, which has naming priority, followed by ‘mon' to indicate one atom of oxygen = dihydrogen monoxide Common names There are a number of common names that chemists like to use instead of the proper scientific names.Most common names and formulae are well-known. It is recommended that common names and formulae be written down as they are encountered so they can be memorised later. Here are a few examples: Common name | Proper name| Chemical formula| water| dihydrogen monoxide| H2O| baking soda| sodium hydrogen carbonate| NaHCO3| table salt| sodium chloride| NaCl| limestone| calcium carbonate| CaCO3| quartz| silicon dioxide| SiO2| See animation 1. What is an acid? Ancient civilis ations had already identified acid as a sour-tasting substance that corroded metal, but confirmation about the exact nature of acid eluded chemists until the 20th century.Early in the 20th century, a number of chemists developed specific chemical definitions for the term ‘acid', although many of these definitions refer to subatomic processes, going into much greater depth than required here. The simplest, most general definition is that an acid is a substance that contains hydrogen and which can release hydrogen cations (H+) during a reaction. The strength of an acid depends on its ability to release hydrogen ions – stronger acids release hydrogen ions more readily. Some of the properties of acid are that they: * Dissolve in water to form excess hydrogen ions Are highly reactive and will corrode most metals * Conduct electricity * Have a sour taste (strong acids are dangerous and should not be taste-tested) * Produce a stinging sensation (as above, strong acids should n ot be handled) There are some common edible acids such as citric acid, which is found in fruits like oranges, lemons and limes, acetic acid, found in vinegar, carbonic acid, which is the ‘fizz' in soft drinks and dairy products, which contain lactic acid. Examples of other acids include: sulphuric acid, present in batteries; and hydrochloric acid, which breaks down food in your stomach. See image 1.Acids like vinegar are used to preserve food because many organisms cannot live in an acidic environment. Similarly, fermentation of food can also produce an acidic environment for preservation purposes – vinegar is an acetic acid formed from grapes, lactic acid comes from fermentation of milk. What is a base? Bases are substances with the opposite properties to acids, that is, a base is a substance that accepts hydrogen ions in a reaction. Strong bases will accept more hydrogen ions than weak ones. Alkalis are soluble bases that contain hydroxide ions (OH-). Some properties of bases include that they: Dissolve in water to absorb excess hydrogen ions * Neutralise the effect of acid * Denature (change the molecular structure) of proteins * Have a bitter taste (strong bases are dangerous and should not be taste-tested) * Feel soapy (as above, strong bases should not be handled) Basic substances in everyday use include sodium hydrogen carbonate, also known as sodium bicarbonate, used in baking to help bread rise, sodium carbonate, used to make soap, and magnesium hydroxide, commonly used in indigestion remedies. Because of an ability to denature proteins, basic substances break down grease and make good cleaners.Considering that the human body is made up of proteins, this makes bases more dangerous for humans than acids. Clarification of terms Before proceeding, it is important to clarify some terms used in experiments with acids and bases. Strong substances are either acids that readily lose hydrogen cations or bases that readily gain hydrogen ions; weak substances less readily lose or gain hydrogen ions. For clarity, concentrated acids and bases are either pure or come dissolved in very little water, while dilute substances are dissolved in a lot of water.Therefore, strong and weak refer to the chemical reactivity of an acidic/basic substance while dilute and concentrate refer to the ratio of water into which the substance dissolves. Indicators It is also important to learn about some of the ways in which to test the strength of acidic and basic substances, since it is not permitted to taste or touch chemicals in a laboratory environment. Chemical substances are classified as acidic (containing acid), basic (containing base) or neutral (containing neither acid nor base). Chemists have developed a number of methods to test the acidity or alkalinity of a substance using chemical indicators.These indicators use the pH scale, with measurements from one to 14 based on the activity of hydrogen ions in the solution. Substances with a low pH are acidic. Substances with a reading of seven are neutral while basic solutions will elicit a higher reading. Developed by Danish scientist Soren Sorensen, the pH scale may have come from the German word ‘potenz' (meaning power or potency) and ‘H', the chemical symbol for hydrogen. It is also possible the term is derived from the Latin ‘pondus hydrogenii', which translates to ‘weight of hydrogen'. See animation 1.Many plants are excellent indicators of pH as they need optimum acidity/alkalinity in the soil to grow. Hydrangeas produce white or blue flowers in acidic soil or pink flowers in basic soil. Blue or red litmus paper, made from a fungal/bacterial growth called lichen, turns red in acid or blue in a base but will not change colour in a neutral solution. A synthetic indicator, bromothymol blue, starts blue and then changes yellow in acid. If placed in a basic or neutral substance it will remain blue. Another indicator would be needed to find out if the substance were neutral or basic.This demonstrates that when using an indicator it is necessary to observe a change in colour to define whether a substance is acidic, basic or neutral. Most indicators have only two colours. The universal indicator is an instrument that mixes several types of indicators and colours in order to show whether a substance is acidic, basic or neutral. Universal indicators have a colour scale that corresponds to the numbered pH scale. After testing, the colour of the paper is matched to a number on the scale for a more exact reading of acidity or alkalinity. See image 2. ReactionsSince acids and bases are more or less opposite substances, they tend to cancel each other out in a process called neutralisation. This reaction produces a salt and water. acid + base salt + water Neutralisation is commonly used in a number of remedies, such as the treatment of bites and stings. Bluebottles inject a basic substance when they sting, so a weak acid like vinegar ( acetic acid) will neutralise a bluebottle sting. Conversely, bee stings are slightly acidic, so a bee sting would be neutralised with a weak base, such as sodium bicarbonate. Seafood gives off an odour due to the basic amines it contains.An acidic acid substance such as lemon juice is squeezed over it to neutralise the smell. Excess acid in the stomach causes indigestion, so it can be neutralised with a weak base called an antacid. An example of an equation using this format is when hydrochloric acid meets sodium hydroxide to form sodium chloride and water: HCl + NaOH NaCl + H2O Adding an acid to a base does not necessarily mean that the product is automatically neutralised. The strength of each of the reactants must be matched so that all the ions released by the acid find a place with the base.A strong acid with a weak base will result in an acidic salt, a weak acid with a strong base will result in a basic salt, while acids and bases of the same strength will neutralise completel y. Both acidic and metallic substances are highly reactive, which is why acid reacts aggressively in the presence of metal, corroding the metal much faster than moisture and air. The combination of an acid and a metal produces a metallic salt and hydrogen gas in an equation represented like this: acid + metal metallic salt + hydrogen The hydrogen ions are easily lost and replaced by the metallic ions, forming a metallic salt.The hydrogen then forms molecules with itself, resulting in hydrogen gas. An example of this is sulphuric acid and magnesium producing magnesium sulphate salt and hydrogen gas: H2SO4 + Mg MgSO4 + H2 No Flash, No Problem Highlight to reveal names Formula| Names| N2F6| Dinitrogen Hexafluoride| CO2| Carbon Dioxide| SiF4| Silicon Tetrafluoride| CBr4| Carbon Tetrabromide| NCl3| Nitrogen Trichloride| P2S3| Diphosphorous Trisulfide| CO| Carbon Monoxide| NO2| Nitrogen Dioxide| SF2| Sulfur Difluoride| PF5| Phosphorous Pentafluoride| SO2| Sulfur Dioxide| NO| Nitrogen Mono xide| CCl4| carbon tetrachloride|P2O5| diphosphorus pentoxide| | | Rules 1. The first element is named first, using the elements name. 2. Second element is named as an Anion (suffix â€Å"-ide†) 3. Prefixes are used to denote the number of atoms 4. â€Å"Mono† is not used to name the first element Note: when the addition of the Greek prefix places two vowels adjacent to one another, the â€Å"a† (or the â€Å"o†) at the end of the Greek prefix is usually dropped; e. g. , â€Å"nonaoxide† would be written as â€Å"nonoxide†, and â€Å"monooxide† would be written as â€Å"monoxide†. The â€Å"i† at the end of the prefixes â€Å"di-† and â€Å"tri-† are never dropped. Prefix| number indicated| | mono-| 1| | di-| 2| | tri-| 3| | tetra-| 4| | penta-| 5| | hexa-| 6| | hepta-| 7| | octa-| 8| | nona-| 9| | deca-| 10| Carbon Allotropes by siebo— last modified April 20, 2007 – 11:54 The allotropes of ca rbon are the different molecular configurations (allotropes) that pure carbon can take. Following is a list of the allotropes of carbon, ordered by notability, and extent of industrial use. Diamond Main article: Diamond Diamond is one of the best known allotropes of carbon, whose hardness and high dispersion of light make it useful for industrial applications and jewelry.Diamond is the hardest known natural mineral, making it an excellent abrasive and also means a diamond holds its polish extremely well and retains luster. The market for industrial-grade diamonds operates much differently from its gem-grade counterpart. Industrial diamonds are valued mostly for their hardness and heat conductivity, making many of the gemological characteristics of diamond, including clarity and color, mostly irrelevant. This helps explain why 80% of mined diamonds (equal to about 100 million carats or 20,000 kg annually), unsuitable for use as gemstones and known as bort, are destined for industrial use.In addition to mined diamonds, synthetic diamonds found industrial applications almost immediately after their invention in the 1950s; another 400 million carats (80,000 kg) of synthetic diamonds are produced annually for industrial use—nearly four times the mass of natural diamonds mined over the same period. The dominant industrial use of diamond is in cutting, drilling, grinding, and polishing. Most uses of diamonds in these technologies do not require large diamonds; in fact, most diamonds that are gem-quality except for their small size, can find an industrial use.Diamonds are embedded in drill tips or saw blades, or ground into a powder for use in grinding and polishing applications. Specialized applications include use in laboratories as containment for high pressure experiments (see diamond anvil), high-performance bearings, and limited use in specialized windows. With the continuing advances being made in the production ofsynthetic diamond, future applications a re beginning to become feasible. Garnering much excitement is the possible use of diamond as asemiconductor suitable to build microchips from, or the use of diamond as a heat sink in electronics.Significant research efforts in Japan, Europe, and the United Statesare under way to capitalize on the potential offered by diamond's unique material properties, combined with increased quality and quantity of supply starting to become available from synthetic diamond manufacturers. Each carbon atom in diamond is covalently bonded to four othercarbons in a tetrahedron. These tetrahedrons together form a 3-dimensional network of puckered six-membered rings of atoms. This stable network of covalent bonds and the three dimensional arrangement of bonds that diamond is so strong. GraphiteMain article: Graphite Graphite (named by Abraham Gottlob Werner in 1789, from the Greek : â€Å"to draw/write†, for its use in pencils) is oneof the most common allotropes of carbon. Unlike diamond, grap hite is a conductor, and can be used, for instance, as the material in the electrodes of an electrical arc lamp. Graphite holds the distinction ofbeing the most stable form of solid carbon ever discovered. Graphite is able to conduct electricity due to the unpaired fourth electron in each carbon atom. This unpaired 4th electron forms delocalisedplanes above and below the planes of the carbon atoms.These electrons are free to move, so are able to conduct electricity. However, the electricity is only conducted within the plane of the layers. Graphite powder is used as a dry lubricant. Although it might be thought that this industrially important property is due entirely to the loose interlamellar coupling between sheets in the structure, in fact in a vacuum environment (such as in technologies for use in space), graphite was found to be a very poor lubricant. This fact lead to the discovery that graphite's lubricity is due to adsorbed air and water between the layers, unlike other lay ered dry lubricants such as molybdenum disulfide.Recent studies suggest that an effect called superlubricity can also account for this effect. When a large number of crystallographic defects bind these planes together, graphite loses its lubrication properties and becomes what is known as pyrolytic carbon, a useful material in blood-contacting implants such as prosthetic heart valves. Natural and crystalline graphites are not often used in pure form as structural materials due to their shear-planes, brittleness and inconsistent mechanical properties.In its pure glassy (isotropic) synthetic forms, pyrolytic graphite and carbon fiber graphite is an extremely strong, heat-resistant (to 3000  °C) material, used in reentry shields for missile nosecones, solid rocket engines, high temperature reactors, brake shoes and electric motor brushes. Intumescent or expandable graphites are used in fire seals, fitted around the perimeter of a fire door. During a fire the graphite intumesces (expa nds and chars) to resist fire penetration and prevent the spread of fumes. A typical start expansion temperature (SET) is between 150 and 300 degrees Celsius.Amorphous carbon Main article: Amorphous carbon Amorphous carbon is the name used for carbon that does not have any crystalline structure. As with all glassy materials, some short-range order can be observed, but there is no long-range pattern of atomic positions. While entirely amorphous carbon can be made, most of the material described as â€Å"amorphous† actually contains crystallites of graphite [1] or diamond [2]with varying amounts of amorphous carbon holding them together, making them technically polycrystalline or nanocrystalline materials.Commercial carbon also usually contains significant quantities of other elements, which may form crystalline impurities. Coal and soot are both informally called amorphous carbon. However, both are products of pyrolysis, which does not produce true amorphous carbon under norma l conditions. The coal industry divides coal up into various grades depending on the amount of carbon present in the sample compared to the amount ofimpurities. The highest grade, anthracite, is about 90 percent carbon and 10% other elements. Bituminous coal is about 75-90 percent carbon, and lignite is the name for coal that is around 55 percent carbon.Fullerenes Main article: Fullerene The fullerenes are recently-discovered allotropes of carbon named after the scientist and architect Richard Buckminster Fuller, but were discovered in 1985 by a team of scientists from Rice University and the University of Sussex, three of whom were awarded the 1996 Nobel Prize in Chemistry. They are molecules composed entirely of carbon, which take the form ofa hollow sphere, ellipsoid, or tube. Spherical fullerenes are sometimes called buckyballs, while cylindrical fullerenes are called buckytubes or nanotubes.As of the early twenty-first century, the chemical and physical properties of fullerenes are still under heavy study, in both pure and applied research labs. In April 2003, fullerenes were under study for potential medicinal use — binding specific antibiotics to the structure to target resistant bacteria and even target certain cancer cells such as melanoma. Fullerenes are similar in structure to graphite, which is composedof a sheet of linked hexagonal rings, but they contain pentagonal (or sometimes heptagonal) rings that prevent the sheet from being planar. Carbon nanotubes Main article: Carbon nanotubeCarbon nanotubes are cylindrical carbon molecules with novel properties that make them potentially useful in a wide variety of applications (e. g. , nano-electronics, optics, materials applications, etc. ). They exhibit extraordinary strength and unique electrical properties, and are efficient conductors of heat. Inorganic nanotubes have also been synthesized. A nanotube (also known as a buckytube) is a member of the fullerene structural family, which also incl udes buckyballs. Whereas buckyballs are spherical in shape, a nanotube is cylindrical, with at least one end typically capped with a hemisphere of the buckyball structure.Their name is derived from their size, since the diameter of a nanotube is on the order of a few nanometers(approximately 50,000 times smaller than the width of a human hair), while they can be up to several centimeters in length. There are two main types of nanotubes: single-walled nanotubes (SWNTs) and multi-walled nanotubes (MWNTs). Aggregated diamond nanorods Main article: Aggregated diamond nanorods Aggregated diamond nanorods, or ADNRs, are an allotrope of carbon believed to be the least compressible material known to humankind, as measured by its sothermal bulk modulus; aggregated diamond nanorods have a modulus of 491 gigapascals (GPa), while a conventional diamondhas a modulus of 442 GPa. ADNRs are also 0. 3% denser than regular diamond. The ADNR material is also harder than type IIa diamond and ultrahard fullerite. Glassy carbon Main article: Glassy carbon Glassy carbon is a class of non-graphitizing carbon which is widely used as an electrode material in electrochemistry, as well as for high temperature crucibles and as a component of some prosthetic devices.It was first produced by workers at the laboratories of The General Electric Company, UK, in the early 1960s, using cellulose as the starting material. A short time later, Japanese workers produced a similar material from phenolic resin. The preparation of glassy carbon involves subjecting the organic precursors to a series of heat treatments at temperatures up to 3000oC. Unlike many non-graphitizing carbons, they are impermeable to gases and are chemically extremely inert, especially those which have been prepared at very high temperatures.It has been demonstrated that the rates of oxidation of certain glassy carbons in oxygen, carbon dioxide or water vapour are lower than those of any other carbon. They are also highly resist ant to attack by acids. Thus, while normal graphiteis reduced to a powder by a mixture of concentrated sulphuric and nitric acids at room temperature, glassy carbon is unaffected by such treatment, even after several months. Carbon nanofoam Main article: Carbon nanofoam Carbon nanofoam is the fifth known allotrope of carbon discovered in 1997 by Andrei V.Rode and co-workers at the Australian National University in Canberra. It consists of a low-density cluster-assembly of carbon atoms strung together in a loose three-dimensional web. Each cluster is about 6 nanometers wide and consists of about 4000 carbon atoms linked in graphite-like sheets that are given negative curvature by the inclusion of heptagons among the regular hexagonal pattern. This is the opposite of what happens in the case of buckminsterfullerenes, in which carbon sheets are given positive curvature by the inclusion of pentagons.The large-scale structure of carbon nanofoam is similar to that of an aerogel, but with 1% of the density of previously produced carbon aerogels – only a few times the density of air at sea level. Unlike carbon aerogels, carbon nanofoam is a poor electrical conductor. Lonsdaleite Main article: Lonsdaleite Lonsdaleite is a hexagonal allotrope of the carbon allotrope diamond, believed to form when meteoric graphite falls to Earth. The great heat and stress of the impact transforms the graphite into diamond, but retains graphite's hexagonal crystal lattice.Lonsdaleite was first identified from the Canyon Diablo meteorite at Barringer Crater (also known as Meteor Crater) in Arizona. It was first discovered in 1967. Lonsdaleite occurs as microscopic crystals associated with diamond in the Canyon Diablo meteorite; Kenna meteorite, New Mexico; and Allan Hills (ALH) 77283, Victoria Land, Antarctica meteorite. It has also been reported from the Tunguska impact site, Russia. Chaoite Main article: Chaoite Chaoite is a mineral believed to have been formed in meteorite impac ts.It has been described as slightly harder than graphite with a reflection colour of grey to white. However, the existence of carbyne phases is disputed – see the entry on chaoite for details. Variability of carbon The system of carbon allotropes spans an astounding range ofextremes, considering that they are all merely structural formations ofthe same element. Between diamond and graphite * Diamond is hardest mineral known to man (10 on Mohs scale), but graphite is one of the softest (1 – 2 on Mohs scale). * Diamond is the ultimate abrasive, but graphite is a very good lubricant. Diamond is an excellent electrical insulator, but graphite is a conductor of electricity. * Diamond is usually transparent, but graphite is opaque. * Diamond crystallizes in the isometric system but graphite crystallizes in the hexagonal system. Between amorphous carbon and nanotubes * Amorphous carbon is among the easiest materials to synthesize, but carbon nanotubes are extremely expensive to make. * Amorphous carbon is completely isotropic, but carbon nanotubes are among the most anisotropic materials ever produced. ALKENE NAMES Root names give the number of carbons in the longest continuous chain.Alkene names are formed by dropping the â€Å"ane† and replacing it with â€Å"ene†The following list gives samples:Example: root = propane – drop â€Å"ane† = â€Å"prop† alkene = â€Å"prop† + alkene ending = â€Å"ene† = propene | No. of Carbons| Root Name| Formula CnH2n| Structure| 2| ethene| C2H4| CH2=CH2| 3| propene| C3H6| CH2=CHCH3| 4| 1-butene| C4H8| CH2=CHCH2CH3| 5| 1-pentene| C5H10| CH2=CHCH2CH2CH3| Following is a list of alkanes showing their chemical formulas, their names, the number of isomers, and the melting and the boiling point. Please note that, except for the first four alkanes (n=1.. ), their chemical names can be derived from the number of C atoms by using Greek numerical prefixes denoting the number of carbons and the suffix â€Å"-ane†. Formula| Name(s)| No. of Isomers| m. p. [ °C]| b. p. [ °C]| CH4| methane (natural gas)| 1| -183| -162| C2H6| ethane| 1| -172| -89| C3H8| propane; dimethyl methane| 1| -188| -42| C4H10| n-butane; methylethyl methane| 2| -138| 0| C5H12| n-pentane| 3| -130| 36| C6H14| n-hexane| 5| -95| 69| C7H16| n-heptane| 9| -91| 98| C8H18| n-octane| 18| -57| 126| C9H20| n-nonane| 35| -54| 151| C10H22| n-decane| 75| -30| 174|The simplest organic compounds are hydrocarbons. Hydrocarbons contain only two elements, hydrogen and carbon. A saturated hydrocarbon or alkane is a hydrocarbon in which all of the carbon-carbon bonds are single bonds. Each carbon atom forms four bonds and each hydrogen forms a single bond to a carbon. The bonding around each carbon atom is tetrahedral, so all bond angles are 109. 5 °. As a result, the carbon atoms in higher alkanes are arranged in zig-zag rather than linear patterns. Straight Chain Alkanes The general formula for an alkane is CnH2n+2 where n is the number of carbon atoms in the molecule.There are two ways of writing a condensed structural formula. For example, butane may be written as CH3CH2CH2CH3 or CH3(CH2)2CH3. Rules for Naming Alkanes * The parent name of the molecule is determined by the number of carbons in the longest chain. * In the case where two chains have the same number of carbons, the parent is the chain with the most substituents. * The carbons in the chain are numbered starting from the end nearest the first substituent. * In the case where there are substituents having the same number of carbons from both ends, numbering starts from the end nearest the next substituent. When more than one of a given substituent is present, a prefix is applied to indicate the number of substituents. Use di- for two, tri- for three, tetra- for four, etc. and use the number assigned to the carbon to indicate the position of each substituent. Branched Alkanes * Branched substituents are numbered starting from the carbon of the substituent attached to the parent chain. From this carbon, count the number of carbons in the longest chain of the substituent. The substituent is named as an alkyl group based on the number of carbons in this chain. Numbering of the substituent chain starts from the carbon attached to the parent chain. * The entire name of the branched substituent is placed in parentheses, preceded by a number indicating which parent-chain carbon it joins. * Substituents are listed in alphabetical order. To alphabetize, ignore numerical (di-, tri-, tetra-) prefixes (e. g. , ethyl would come before dimethyl), but don't ignore don't ignore positional prefixes such as iso and tert (e. g. , triethyl comes before tertbutyl). Cyclic Alkanes * The parent name is determined by the number of carbons in the largest ring (e. g. , cycloalkane such as cyclohexane). In the case where the ring is attached to a chain containing additional carbons, the ring is considered to be a su bstituent on the chain. A substituted ring that is a substituent on something else is named using the rules for branched alkanes. * When two rings are attached to each other, the larger ring is the parent and the smaller is a cycloalkyl substituent. * The carbons of the ring are numbered such that the substituents are given the lowest possible numbers. Straight Chain Alkanes # Carbon| Name| Molecular Formula| Structural Formula| 1 | Methane | CH4 | CH4 | 2 | Ethane | C2H6 | CH3CH3 | | Propane | C3H8 | CH3CH2CH3 | 4 | Butane | C4H10 | CH3CH2CH2CH3 | 5 | Pentane | C5H12 | CH3CH2CH2CH2CH3 | 6 | Hexane | C6H14 | CH3(CH2)4CH3 | 7 | Heptane | C7H16 | CH3(CH2)5CH3 | 8 | Octane | C8H18 | CH3(CH2)6CH3 | 9 | Nonane | C9H20 | CH3(CH2)7CH3 | 10 | Decane | C10H22 | CH3(CH2)8CH3 | Alkenes contain carbon-carbon double bonds. They are also called unsaturated hydrocarbons. The molecular formular is CnH2n. This is the same molecular formula as a cycloalkane. Structure of Alkenes 1. The two carbon ato ms of a double bond and the four atoms attached to them lie in a plane, with bond angles of approximately 120 ° . A double bond consists of one sigma bond formed by overlap of sp2 hybrid orbitals and one pi bond formed by overlap of parallel 2 P orbitals Here is a chart containing the systemic name for the first twenty straight chain alkenes. Name| Molecular formula| Ethene| C2H4| Propene| C3H6| Butene| C4H8| Pentene| C5H10| Hexene| C6H12| Heptene| C7H14| Octene| C8H16| Nonene| C9H18| Decene| C10H20| Undecene| C11H22| Dodecene| C12H24| Tridecene| C13H26| Tetradecene| C14H28| Pentadecene| C15H30| Hexadecene| C16H32| Heptadecene| C17H34| Octadecene| C18H36| Nonadecene| C19H38|Eicosene| C20H40| Did you notice how there is no methene? Because it is impossible for a Carbon to have a double bond with nothing. The Basic Rules: A. For straight chain alkenes, it is the same basic rules as nomenclature of alkanes except change the suffix to â€Å"-ene. † i. Find the Longest Carbon Ch ain that Contains the Carbon Carbon double bond. (If you have two ties for longest Carbon chain, and both chains contain a Carbon Carbon double bond, then look for most substituted chain. ) ii. Give the lowest possible number to the Carbon Carbon double bond. 1.Do not need to number cycloalkenes because it is understood that the double bond is in the one position. 2. Alkenes that have the same molecular formula but the location of the doble bonds are different means they are constitutional isomers. 3. Functional Groups with higher priority: iii. Add substituents and their position to the alkene as prefixes. Of course remember to give the lowest numbers possible. And remember to name them in alphabetical order when writting them. iv. Next is identifying stereoisomers. when there are only two non hydrogen attachments to the alkene then use cis and trans to name the molecule.In this diagram this is a cis conformation. It has both the substituents going upward. (This molecule would be c alled (cis) 5-chloro-3-heptene. ) Trans would look like this v. On the other hand if there are 3 or 4 non-hydrogen different atoms attached to the alkene then use the E, Z system. E (entgegen) means the higher priority groups are opposite one another relative to the double bond. Z (zusammen) means the higher priority groups are on the same side relative to the double bond. (You could think of Z as Zame Zide to help memorize it. ) In this example it is E-4-chloro-3-heptene.It is E because the Chlorine and the CH2CH3 are the two higher priorities and they are on opposite sides. vi. A hydroxyl group gets precedence over th double bond. Therefore alkenes containing alchol groups are called alkenols. And the prefix becomes –enol. And this means that now the alcohol gets lowest priority over the alkene. vii. Lastly remember that alkene substituents are called alkenyl. Suffix –enyl. B. For common names i. remove the -ane suffix and add -ylene. There are a couple of unique one s like ethenyl's common name is vinyl and 2-propenyl's common name is allyl.

Computers for Personal Use - 1162 Words

* A personal computer (PC) is a general-purpose computer, whose size, capabilities, and original sale price makes it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator. * Software applications for most personal computers include, but are not limited to, word processing, spreadsheets, databases, Web browsers and e-mail clients, digital mediaplayback, games, and myriad personal productivity and special-purpose software applications. Gaming Computer * A gaming computer is a standard desktop computer that typically has high-performance hardware, such as a more powerful video card, processor, and memory, in order to handle the requirements of demanding video games†¦show more content†¦Computers help in keeping a record of the cash. Computers help in giving all kinds of information regarding any account in the bank ENTERTAINMENT * Computers are used for playing games, listening to music and watching movies. Computers are used for making cartoon movies and animation films. Computers are used for making drawings. RAILWAY STATIONS and AIRPORTS * Computers help in giving information about ticket reservations and bookings. * Computers help in giving information about the arrival and departure timings of trains and aeroplanes. * Computers help in keeping records of all the passengers. OFFICE * Computers are used to type and print documents, letters, etc. * Computers help in keeping records of office employees. * Computers help in sending e-mails HOSPITALS * Computers help in keeping records of all the patients in a hospital. Computers help doctors in controlling operation theatre machines. * Computers help in doing a number of medical tests. DESIGNING * Computers help in designing magazines, newspapers, books, advertisment, etc. Computers help in designing buildings, houses, etc. Greeting Cards : * You can send and receive greetings pertaining to different occasions. Sports: *Show MoreRelatedPolicy Restricting Personal Use Of Computers And Systems1591 Words   |  7 PagesACCEPTABLE USE POLICY POLICY restricting personal use of computers and systems NOTE: This document contains IA Controls 1. SCOPE: This policy applies to all employees who use a Big Tech BYOD or any computer on Big Tech Network 2. CONSENT PROVISION. By signing this document, you acknowledge and consent that when you access Big Tech : a. You are accessing This Acceptable Use Policy (AUP) applies to all Big Tech Internet-related services, without restriction services provided through WiFi (ServiceRead MoreThe Most Powerful Computers Of The Technology World1104 Words   |  5 PagesSupercomputers The most powerful computers in the technology world are the Supercomputers. Hence, as the word ‘super’ elaborate that supercomputers are usually used for the projects that needs to process large amount of data, at very high speed. Supercomputers not only has the high processing power; they are also huge in size. You need a big room to fit in a supercomputer, and a strong cooling system to avoid getting a supercomputer to get overheated. They usually have more than one CPU’s to generateRead MoreThe Technology Era Of Technology1580 Words   |  7 PagesGlenbrook South student handed a large, white cardboard box with the contents I had been anticipating all summer. It was Christmas in August. In the evolutionary era of technology, schools have become increasingly dependent on the usage of internet and computers. As teachers are provided with more and more online resources for instructing, it only makes sense for students to follow. 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Armstrong Trident University International Module 3 Case Study In the year 2015, the personal computer is definitely not the same as the colossal square shaped computer that began to spread into homes as far back as the mid 1980 s. As indicated by United States Census Bureau, more than 85% of all homes in the United States have personal computers and or access to mobile computing. ((File) Computers have changed the way individuals, scholars, and organizations work, communicate, educated, liveRead MoreDesktops And All Of One Pcs Essay1566 Words   |  7 PagesPersonal Computers Figure 3: J McArthur, (2014), All in One PC [ONLINE]. Available at: http://www.techreviewer.co.uk/2015-time-to-kiss-your-desktop-goodbye/ [Accessed 9 November 2016]. 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Obesity A Healthy Lifestyle - 919 Words

Too many people are obese. Americans are becoming very lazy and are less motivated to work out or exercise. Americans are also becoming dependent to fast unhealthy food places to eat every day. Americans need to choose a healthy lifestyle vs. an unhealthy lifestyle because being healthy is essential in today’s competitive world. According to Center of Disease Control in 2013 it states that 35.7% of Americans are obese. Obesity is a very harmful disease that can be cured from good nutrition and exercise. Obesity is caused from over eating and lack of exercise. Obesity is some cases has many side effects. Obesity can cause diabetes, asthma, and even heart failure. Most of the side effects caused from obesity can be cured through weight loss and better nutrition. Obesity is a growing number that must be stopped. According to World Health Organization obesity worldwide has more than doubled since 1980. When we were little, we were taught not to waste food and to eat all that’s on our plate. But now that can be a bad thing. Over eating and bigger portion sizes are becoming more common in today’s fast food market. The bigger portion sizes are coming with more unhealthy foods and as a result more calories. The big sugary drinks are very unhealthy and have very little to no nutrients. All these extra sugars and calories add up and can lead to long term damage on your body. According to www.Mercola.com, in America, one in five deaths are associated with obesity. BeingShow MoreRelatedChildhood Obesity: The Need For a Healthy Lifestyle Essay1999 Words   |  8 Pagesâ€Å"The nation’s obesity epidemic has become so bad that it has taken over tobacco as the leading cause of preventable diseases† (Gaffney). Health care c osts linked to obesity and resulting conditions such as diabetes and heart disease are greater than those related to smoking and excessive drinking (Gaffney). 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Liver Kidney Disease A Severe Form Of Hereditary Disease

Polycystic kidney disease (PKD) is a severe form of hereditary disease which results from a monogenic disorder. The disease causes enlargement alongside with functional impairment. It results in clusters of cysts mainly within the kidneys. Cysts are noncancerous round sacs consisting of water like fluid which vary in size depending on its accumulating growth (Mayo Clinic Staff, 2014). This cystic disease consists of two forms, an autosomal dominant PKD (ADPKD) and an autosomal recessive PKD (ARPKD). The purpose of this research paper is to increase chances of healthy babies born to couples whom both transmit a mutation of PKHD1 gene, wanting to have a child unaffected with autosomal recessive polycystic kidney disease (ARPKD). A recessive mutation/disease is when the gene is inherited from both parents. This disease is of major interest due to the amount of individuals affected widely. Over 12.5 million individuals have PKD, with approximately 30% of affected children dying within th eir first year of life; making it a major source of morbidity and mortality concern (Miyazaki et al., 2015). ADPKD makes up to 96-98% of all cases, and ARPKD up to 2-5%. Although ADPKD is more harmful, the main focal point of this research paper is on autosomal recessive polycystic kidney disease (ARPKD). Due to the abnormalities in the biliary plates it leads to congenital hepatic fibrosis in infants. Congenital hepatic fibrosis is the disease of the liver which is usually present from birth.Show MoreRelatedSymptoms and Treatments of Hemochromatosis756 Words   |  3 PagesHemochromatosis, also called iron overload, is a disease when the body absorbs too much iron from the food we eat and most often affects the liver, heart, pancreas, and skin. It is usually caused by genes in the body that mutate keeping them from working. 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International Business for Agribusiness and Food - MyAssignmenthelp

Question: Discuss about theInternational Businessfor Agribusiness and Food Industries. Answer: Marketing Considerations and Strategies The initial step by all connection improvement stands just before distinguish the sort of connection compulsory besides the equal of outer bolster this might stay essential. The situation is critical to adjust the equal of bolster obtainable through the measure of help truly compulsory. Connections can remain imperiled together through besides little besides an excessive amount of support. Straightforward strides by agriculturists to enhance linkages with merchants by building up create may require close to somebody to make the underlying recommendation and go about as the genuine intermediary. An expansion specialist might have the capacity to complete this part (Shepherd, 2007). By a somewhat additional intricate equal, connections by an urban seller, eatery before processor might stand somewhat that a neighborhood scientists and experts or an agriculturist affiliation could create. Working with the Private Sector Although an insufficient analyst and specialists have built up a solid business concentrate, some giver and driven tasks, while taking after approaches that certainly perceive the basic part of the private division, don't really make an interpretation of these arrangements into sound practices. There remains a lingering threatening vibe to the private part. This can lead the connecting associations to look to set up option promoting channels. Cases of where such option channels have turned out to be economical are hard to discover Capacity of the Linking Organization is Vital While numerous analyst and specialists and other advancement associations have made the move from a generation drove way to deal with to a greater extent a market-drove introduction, many keep on lacking the vital business way to deal through empower them to prompt ranchers. Analyst and specialists themselves, for the most part recognize this reality. At a FAO workshop for analyst and specialists in west Thailand numerous members highlighted the way which required further institutional preparing and advancement before they could function admirably to interface the private segment with rustic groups (Edwardson, Santacoloma, 2013). Avoiding Direct Service Provision and Subsidies As already noted, with a foundation chipping away at assistance software engineers it has required investment for some analyst and specialists to value that long haul business achievement is not accomplished through doing practically everything for agriculturists, as might apply to an alleviation modified, however through encouraging ranchers to get things done for themselves and to empower them to connect up with fitting specialist co-ops. Coordinate administration arrangement, for instance, giving transport to move agriculturists' deliver to ads, appropriating inputs and giving credit can accomplish here and now benefits for ranchers. RD Considerations and Strategies Thailand has utilized the range wide approach of bug administration to recognize a few bug buildings and creepy crawly bothers for administration and research. Nuisances are a noteworthy risk to the primary production and also to handle crops, vegetables, manors and organic product trees. These incorporated some intrusive outsider vegetables, shrimps, and other sea foods. Few nuisance administration strategies and methodologies have been concocted, utilized and coordinated into Thailand's "incorporated bug administration IPM" framework (Linking Farmers to Market: Some Success Stories from Asia-Pacific Region, 2008). Range wide vermin administration is one of the key irritation administration systems utilized. It gives a long haul arranged battle against a nuisance creepy crawly populace in a moderately substantial predefined territory with the goal of lessening the bug populace to a noneconomic status. Other non-creepy crawly farming nuisances, for example, wildflowers, vegetable in fections, nematodes, pests besides winged animals remain likewise helpless towards the range varied idea. The situation is connected beside an imperative creepy crawly bother over a generally substantial range including numerous individual makers of the same or comparable harvests. Now Thailand, the program ordinarily utilizes specific techniques for nuisance control that are not powerful on an individual ranch premise. These specific strategies incorporate the utilization of clean male demolition, creepy crawly strategy (SIT), common foes (parasites or parasitoids and predators), have plant resistance, trap crops, mating inhibitors, pesticides, and physical, compound, natural and lawful or administrative control techniques; they are executed by Thai master associations in coordinated nuisance administration (Linking Farmers to Market: Some Success Stories from Asia-Pacific Region, 2008). In Thailand, SIT offices are given through the Workplace of Particles aimed at Peacetime. The N ationwide Organic Regulator Exploration Focus at Kasetsart College besides hers provincial focus situated on altogether important agro - geological regions the nation remain commanded to execute natural regulator of pest rats and wildflowers. The Subdivision of Agricultural Postponement assistances contribution farmers to fight pest and extra plant vermin. Production Strategies Generally speaking, contract cultivating in Thailand has been executed and overseen uniquely in contrast to different nations, with extremely solid mediation and advancement under the 4-part Plan and in addition Mekong sub-local financial collaboration. Agribusiness has gotten significant motivating forces and advancement. Since Thailand is agro sending out nation, agribusiness has ruled strategy making. This has brought about better general rural development and advancement impacts through the move to high esteem crops .In the western district, sugar stick, oven, and hoard contracts have demonstrated fruitful. With infant corn, contracts were made between town to go between the fields, with agents giving agriculturists seed, compost, credits, and tractor administrations. Contracts were made amongst go farmers yet not brokers and organizations and included ensured least costs, asparagus and infant corn, and extra costs when the common market cost expanded (Sriboonchitta and Wiboonpoo ngse, 2008). On account of asparagus, the fundamental state of the agreement is to ensure a settled cost for the entire year for different evaluations. This is an indistinguishable model from that utilized by potato temporary workers in Chiang Mai and is an effective case of private-government-rancher participation. Thailand is the world's second biggest maker of Dark Tiger shrimp. Amid the sixth and fifth National Improvement Arranges, multinational firms like Cargill were urged to put resources into smallholders financed by different banks and the BAAC. Obviously, comes back to smallholders were significant. Nonetheless, there is have to evaluate chance because of aggregated illness and social effect concerning mangrove deforestation. Little cultivators favored working under contract cultivating to hazard taking in an unstable market. They even rejected a helpful approach after the experience of poor market costs because of lacking quality control. In the Upper east, the accomplis hment of fares relies on upon the arrangement of water system water. Creation can be stretched out amid the wet season, and the presentation of dry season crops and non-conventional products of high attractiveness, bolstered by specialized counsel under an agreement cultivating plan, has been compelling, as on account of tomatoes upheld by BAAC. The development of tomato contracting in this district was joined by question about deterioration, production line shutdowns, and different issues, however they were settled through shared advantage contracts (Sriboonchitta and Wiboonpoongse, 2008). The case highlights the practicality of the administration agribusiness little holder relationship therefore of government interest in important foundation including physical, administration, and coordination bolster. References Edwardson, W., Santacoloma, P. (2013). Organic supply chains for small farmer income generation in developing countries.Agribusiness And Food Industries. Retrieved from https://www.fao.org/docrep/017/i3122e/i3122e.pdf Linking Farmers to Market: Some Success Stories from Asia-Pacific Region. (2008). Asia-Pacific Association of Agricultural Research Institutions. [online] Available at: https://www.apaari.org/wp-content/uploads/2009/05/ss_2008_01.pdf [Accessed 26 May 2017]. Sriboonchitta, S. and Wiboonpoongse, A. (2008). Overview of Contract Farming in Thailand. ADB Institute Discussion. [online] Available at: https://www.fao.org/uploads/media/ADBI%20contract%20farming%20thailand.pdf [Accessed 26 May 2017]. Shepherd, A. (2007). Approaches to linking producers to markets.AGRICULTURAL MANAGEMENT, MARKETING AND FINANCE. Retrieved from https://www.fao.org/3/a-a1123e.pdf Thai Rice Policies and Strategies. (2017).INSIDE THAILAND. Retrieved from https://thailand.prd.go.th/ewt_news.php?nid=1764filename=index

The Joy of Being a Teacher free essay sample

The Joy of Being a Teacher. It is said, there is happiness in giving; that means there is happiness in teaching. But I get much more than mere happiness, and derive the true Joie de vivre from teaching. What causes it, I cant tell; may be its the vibrations all around, or, well, it could be ones heart that has found its moorings. The only other profession which can claim greater Joy, I feel, is that of a doctor who may find the true bliss of being a saviour to many. Yet, that profession is ridden with too many risks as well as temptations. Who else, but teachers can see the young minds, sow minute seeds of dreams or plant saplings of thoughts in them? We revel in the wonderful (wonderstruck) world of the young ones. In fact, we grow up with them, getting renewed and refreshed constantly. We will write a custom essay sample on The Joy of Being a Teacher or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Generally, people tend to carry many prejudices, often the result of staying within a confined environment for too long. Even in such cases, a teacher gets exposed to a wide spectrum of people (or, should I say, pupils) that she learns to accept the differences. In spite of all those noble talks about the profession, it remains a low profile Job in India, obviously weighed down by considerations of money. It is not even an option for the bright students. I was indeed surprised and excited to find that teaching is held in the highest esteem in a materialistic country such as Singapore. I do feel that the profession deserves a re-evaluation. We should feel proud of what we are! Emoluments should not be the criterion for Judging the worth of a profession; but its ennobling qualities can be! Mrs. KS Sasikala ,KVI Palakkad.