Specialty of Yellow Sapphires Free Essays

Yellow sapphire ring Long gone are the times when blue was the only color associated with sapphires. With every leap mankind has taken, new wonders in every field have come to the forefront, yellow sapphire being one of them. Cheerful, sunny Yellow is synonymous with success, self confidence and power. We will write a custom essay sample on Specialty of Yellow Sapphires or any similar topic only for you Order Now Universally, yellow sapphire rings are worn for therapeutic, medical and spiritual reasons . The power of yellow sapphires is such that it is reported that by wearing it the girl of your dreams will become yours truly and if girls wear it they will find their true prince charming. The history of yellow sapphires is very interesting. For ages, the inside people of gem trade guarded its existence and found this magnificent stone worthy of nobody less than royalty. Considered to be the safest stone in gem industry for its neutral effects on the people with which it has least compatibility and exceeding effects on those it suits, it is the most valuable gem, coming second only to the diamonds. In fact the diamonds and sapphires are very much alike in appearance and luster. It is the unique chemical structure of each which sets them apart. It is often said that a naked human eye can’t easily distinguish between these two beauties. Like diamonds, sapphires also exist in various hues and shades, depending on the type of impurity impregnating its internal structure. After chemically analyzing it, it has been found that iron, aluminum and florin are present in it. The yellow sapphires were originally found in the lands of Srilanka and India. In several cultures all over the world, yellow sapphires have great astrological significance. Wearing a large yellow sapphire ring brings peace, good luck and prosperity. It is the symbol of wisdom and wit. It exudes a calmness and serenity which enables the wearer to deal with his day to day activities with the attitude of a winner. Apart from this, ladies will agree that wearing unique, eye catching and one of its kind yellow sapphire rings will no doubt add an extra oomph to their outfit and personality and give it a warm accent on grayest of the days. You can always ear a small, delicate ring with formal attire or a large, eye catching piece on fancy occasions and be the centre of attention. Additionally, different colored sapphires can all be worn simultaneously depending on the mood and they will still look beautiful. Sapphires are often confused with the mood identifying opals because they have the ability to change color based on the intensity of light they are exposed into. Yellow, green, pink, violet, blue and purple are just some colors which these sapphires can sh ow. The color changing ability has nothing to do with the change in mood in fact it’s the following three factors which play a major role in the color changing abilities of sapphires. Hue: The hue is what you see as the color. Saturation: The saturation describes the brightness or vividness of the color. Tone: The tone refers to the darkness or lightness of the color. Yellow sapphires are found in a range of hues from smooth transparent light yellow to deep greenish yellow and orange yellow. Sometimes the yellow in these sapphires can be so pale that it can be deemed as a transparent white sapphire. Deep golden sapphires with a tint of orange in them are considered to be the finest type of yellow sapphires. The deeper the color of the stone the more it is valuable. Mostly these gem stones are cut in oral shapes with multiple facets to retain maximum weight of the stone and highlight inclusions like feather, color zoning, crystals or the natural fissures etc Because of their distinctive value in history, these stones are favored by men and women all over the world. Buying yellow sapphire rings is a safe bet as they are astrologically suited to every kind of nature and make for wonderful rings to celebrate your past, present and future with your loved one. Distinctive yellow engagement sapphire rings look bedazzling, are durable and are marked with the power of creating harmony and affection in a relationship. Indeed, Princess Diana herself received one of the most exquisite sapphire ring on her engagement. In meticulous cuts, brilliant hues and its shimmering beauty yellow sapphire rings will be undoubtedly an unparalleled addition to your jewelry collection. How to cite Specialty of Yellow Sapphires, Essay examples

Athlete Salary free essay sample

How would you like to get paid millions just because people like to watch you do your job? Well that is exactly what is happening in the world of professional sports. Athletes are being over paid just to play play a game. This kind of income promotes over spending and bad life choices by many playing sports. The salaries of professional athletes need to bee lowered. Many people who have tougher jobs are more deserving of that kind of money, and the athletes that make that kind of money waste it and have no morals. There are definately people more deserving of high salaries than a professional athlete. The president of the united states, who has one of the toughest jobs in the nation, makes no where near as much as an athlete. Barack Obama makes around $400,000 a year while Alex Rodriguez makes around $33 million a year (McSharry ). Another job that effects the lives of almost every american is the job of a school teacher. We will write a custom essay sample on Athlete Salary or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page School teachers are very deserving of high pay and yet the average income of a high school teacher is only $43,437 (Teacher Salary ). That is only a mere fraction of what some of todays sports entertainers make. People who serve in the miltary are also much more deserving of a highi salary than an athlete. Anyone who serves in any branch of the military puts their life in danger almost every day on the job. However the average salary of military personnel is only around $60,000 a year (Military Salary ). That is a very low income for someone who takes the chance of dying everytime theyre doing their job. And what if you are in an emergency situation and need to be rushed to a hospital? Your best bet is an ambulance. The person driving the ambulance and rushing you to hekp only gets paid an average of $27, 639 a year (Average Ambulance )! That pales in comparison to the income of even retired athletes like Michael Jordan who still rakes in around $45 million a year (#18 Michael ). Although there are a select few athletes that actually donate some of their income and use their high pay for good uses, the majority of athletes waste their money and live immoral lifestyles. The athletes have money thrown at them, usually at a young age, and they have no discipline. They make bad investments and do absurd amounts of spending. Cars, houses, clothing, partying, and sometimes even drugs are all parts of most athletes lifestyles (The 6 ). This kind of living often results in players going bankrupt (The 6 ). Many athletes also get into trouble with the law becauses they think they are invincible and can buy their way out of anything. An example of an athlete who let all the fame and fortune go to his head and in turn led an immoral lifestyle is Tiger Woods. Tiger Woods, who was married with kids, admitted to having affairs with over 100 women (30, Vancouver ). He used his fame and money to gain affairs with women whicih eventually split his family apart. The best way to put an end to some of the excessive spending and lifestyles would be to put a salary cap into play. Athough players would still get paid quite a bit of money, there would at least be a limit to how much they get. Enforcing a salary cap might also make players respect their jobs a little more. Maybe star athletes would try harder if they didnt have such whopping salaries. Maybe making salaries based more on performance would help. says Perry Norris a pro sports fan in favor of the salary cap. Enforcing a salary cap might also help to make the game more fair. If all the players incomes were set then the more talented players would not pile up on the team that pays the most. The fact that athletes are over paid is something that definately does not need to be overlooked. Players lifestyles will continue to spiral out of control if their income is not limited. The salaries of professional athletes continue to go up and and are peaking in the hundred million dollar range (Freedman ). A salary cap needs to be enforced as soon as soon as possible.

Insectivorous Plants free essay sample

The rapid acid growth allows the sundew tentacles to bend, aiding in the retention and digestion of prey. [5] Pitfall traps Main article: Pitcher plant Pitfall traps are thought to have evolved independently on at least four occasions. The simplest ones are probably those of Heliamphora, the marsh pitcher plant. In this genus, the traps are clearly derived evolutionarily from a simple rolled leaf whose margins have sealed together. These plants live in areas of high rainfall in South America such as Mount Roraima and consequently have a problem ensuring their pitchers do not overflow. To counteract this problem, natural selection has favoured the evolution of an overflow similar to that of a bathroom sink—a small gap in the zipped-up leaf margins allows excess water to flow out of the pitcher. Heliamphora is a member of the Sarraceniaceae, a New World family in the order Ericales (heathers and allies). Heliamphora is limited to South America, but the family contains two other genera, Sarracenia and Darlingtonia, which are endemic to the Southeastern United States (with the exception of one species) and California respectively. We will write a custom essay sample on Insectivorous Plants or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Sarracenia purpurea subsp. urpurea (the northern pitcher plant) can be found as far north as Canada. Sarracenia is the pitcher plant genus most commonly encountered in cultivation, because it is relatively hardy and easy to grow. Darlingtonia californica: note the small entrance to the trap underneath the swollen balloon and the colourless patches that confuse prey trapped inside. In the genus Sarracenia, the problem of pitcher overflow is solved by an operculum, which is essentially a flared leaflet that covers the opening of the rolled-leaf tube and protects it from rain. Possibly because of this improved waterproofing, Sarracenia species secrete enzymes such as proteases and phosphatases into the digestive fluid at the bottom of the pitcher; Heliamphora relies on bacterial digestion alone. The enzymes digest the proteins and nucleic acids in the prey, releasing amino acids and phosphate ions, which the plant absorbs. Darlingtonia californica, the cobra plant, possesses an adaptation also found in Sarracenia psittacina and, to a lesser extent, in Sarracenia minor: the operculum is balloon-like and almost seals the opening to the tube. This balloon-like chamber is pitted with areolae, chlorophyll-free patches through which light can penetrate. Insects, mostly ants, enter the chamber via the opening underneath the balloon. Once inside, they tire themselves trying to escape from these false exits, until they eventually fall into the tube. Prey access is increased by the fish tails, outgrowths of the operculum that give the plant its name. Some seedling Sarracenia species also have long, overhanging opercular outgrowths; Darlingtonia may therefore represent an example of neoteny. Brocchinia reducta: a carnivorous bromeliad The second major group of pitcher plants are the monkey cups or tropical pitcher plants of the genus Nepenthes. In the hundred or so species of this genus, the pitcher is borne at the end of a tendril, which grows as an extension to the midrib of the leaf. Most species catch insects, although the larger ones, particularly N. rajah, also occasionally take small mammals and reptiles. These pitchers represent a convenient source of food to small insectivores. Nepenthes bicalcarata possesses two sharp thorns that project from the base of the operculum over the entrance to the pitcher. These likely serve to lure insects into a precarious position over the pitcher mouth, where they may lose their footing and fall into the fluid within. [6] The pitfall trap has evolved independently in at least two other groups. The Albany pitcher plant Cephalotus follicularis is a small pitcher plant from Western Australia, with moccasin-like pitchers. The rim of its pitchers opening (the peristome) is particularly pronounced (both secrete nectar) and provides a thorny overhang to the opening, preventing trapped insects from climbing out. The lining of most pitcher plants is covered in a loose coating of waxy flakes, which are slippery for insects, prey that are often attracted by nectar bribes secreted by the peristome and by bright flower-like anthocyanin patterning. In at least one species, Sarracenia flava, the nectar bribe is laced with coniine, a toxic alkaloid also found in hemlock, which probably increases the efficiency of the traps by intoxicating prey. [7] The final carnivore with a pitfall-like trap is the bromeliad Brocchinia reducta. Like most relatives of the pineapple, the tightly-packed, waxy leaf bases of the strap-like leaves of this species form an urn. In most bromeliads, water collects readily in this urn and may provide habitats for frogs, insects and, more useful for the plant, diazotrophic (nitrogen-fixing) bacteria. In Brocchinia, the urn is a specialised insect trap, with a loose, waxy lining and a population of digestive bacteria. [citation needed] Flypaper traps The leaf of a Drosera capensis bending in response to the trapping of an insect The flypaper trap is based on a sticky mucilage, or glue. The leaf of flypaper traps is studded with mucilage-secreting glands, which may be short and nondescript (like those of the butterworts), or long and mobile (like those of many sundews). Flypapers have evolved independently at least five times. In the genus Pinguicula, the mucilage glands are quite short (sessile), and the leaf, while shiny (giving the genus its common name of butterwort), does not appear carnivorous. However, this belies the fact that the leaf is an extremely effective trap of small flying insects (such as fungus gnats), and its surface responds to prey by relatively rapid growth. This thigmotropic growth may involve rolling of the leaf blade (to prevent rain from splashing the prey off the leaf surface) or dishing of the surface under the prey to form a shallow digestive pit. The sundew genus (Drosera) consists of over 100 species of active flypapers whose mucilage glands are borne at the end of long tentacles, which frequently grow fast enough in response to prey (thigmotropism) to aid the trapping process. The tentacles of D. burmanii can bend 180Â ° in a minute or so. Sundews are extremely cosmopolitan and are found on all the continents except the Antarctic mainland. They are most diverse in Australia, the home to the large subgroup of pygmy sundews such as D. pygmaea and to a number of tuberous sundews such as D. peltata, which form tubers that aestivate during the dry summer months. These species are so dependent on insect sources of nitrogen that they generally lack the enzyme nitrate reductase, which most plants require to assimilate soil-borne nitrate into organic forms. Drosera capensis responding to captured prey. This scene is about 4 hours in real-time. Closely related to Drosera is the Portuguese dewy pine, Drosophyllum, which differs from the sundews in being passive. Its leaves are incapable of rapid movement or growth. Unrelated, but similar in habit, are the Australian rainbow plants (Byblis). Drosophyllum is unusual in that it grows under near-desert conditions; almost all other carnivores are either bog plants or grow in moist tropical areas. Recent molecular data (particularly the production of plumbagin) indicate that the remaining flypaper, Triphyophyllum peltatum, a member of the Dioncophyllaceae, is closely related to Drosophyllum and forms part of a larger clade of carnivorous and non-carnivorous plants with the Droseraceae, Nepenthaceae, Ancistrocladaceae and Plumbaginaceae. This plant is usually encountered as a liana, but in its juvenile phase, the plant is carnivorous. This may be related to a requirement for specific nutrients for flowering. Snap traps The snap traps of Dionaea muscipula close rapidly when the sensitive hairs on the leaf lobes are triggered. The only two active snap traps—the Venus flytrap (Dionaea muscipula) and the waterwheel plant (Aldrovanda vesiculosa)—are believed to have had a common ancestor with similar adaptations. Their trapping mechanism has also been described as a mouse trap , bear trap or man trap, based on their shape and rapid movement. However, the term snap trap is preferred as other designations are misleading, particularly with respect to the intended prey. Aldrovanda is aquatic and specialised in catching small invertebrates; Dionaea is terrestrial and catches a variety of arthropods, including spiders. [8] The traps are very similar, with leaves whose terminal section is divided into two lobes, hinged along the midrib. Trigger hairs (three on each lobe in Dionaea muscipula, many more in the case of Aldrovanda) inside the trap lobes are sensitive to touch. When a trigger hair is bent, stretch-gated ion channels in the membranes of cells at the base of the trigger hair open, generating an action potential that propagates to cells in the midrib. [9] These cells respond by pumping out ions, which may either cause water to follow by osmosis (collapsing the cells in the midrib) or cause rapid acid growth. [10] The mechanism is still debated, but in any case, changes in the shape of cells in the midrib allow the lobes, held under tension, to snap shut,[9] flipping rapidly from convex to concave[11] and interring the prey. This whole process takes less than a second. In the Venus flytrap, closure in response to raindrops and blown-in debris is prevented by the leaves having a simple memory: for the lobes to shut, two stimuli are required, 0. 5 to 30 seconds apart. The snapping of the leaves is a case of thigmonasty (undirected movement in response to touch). Further stimulation of the lobes internal surfaces by the struggling insects causes the lobes to close even tighter (thigmotropism), sealing the lobes hermetically and forming a stomach in which digestion occurs over a period of one to two weeks. Leaves can be reused three or four times before they become unresponsive to stimulation, depending on the growing conditions. The tip of one stolon of Utricularia vulgaris, showing stolon, branching leaf-shoots, and transparent bladder traps Bladder traps Bladder traps are exclusive to the genus Utricularia, or bladderworts. The bladders (vesicula) pump ions out of their interiors. Water follows by osmosis, generating a partial vacuum inside the bladder. The bladder has a small opening, sealed by a hinged door. In aquatic species, the door has a pair of long trigger hairs. Aquatic invertebrates such as Daphnia touch these hairs and deform the door by lever action, releasing the vacuum. The invertebrate is sucked into the bladder, where it is digested. Many species of Utricularia (such as U. sandersonii) are terrestrial, growing on waterlogged soil, and their trapping mechanism is triggered in a slightly different manner. Bladderworts lack roots, but terrestrial species have anchoring stems that resemble them. Temperate aquatic bladderworts generally die back to a resting turion during the winter months, and U. acrorhiza appears to regulate the number of bladders it bears in response to the prevailing nutrient content of its habitat. Lobster-pot traps Genlisea violacea traps and leaves A lobster-pot trap is a chamber that is easy to enter, and whose exit is either difficult to find or obstructed by inward-pointing bristles. Lobster pots are the trapping mechanism in Genlisea, the corkscrew plants. These plants appear to specialise in aquatic protozoa. A Y-shaped modified leaf allows prey to enter but not exit. Inward-pointing hairs force the prey to move in a particular direction. Prey entering the spiral entrance that coils around the upper two arms of the Y are forced to move inexorably towards a stomach in the lower arm of the Y, where they are digested. Prey movement is also thought to be encouraged by water movement through the trap, produced in a similar way to the vacuum in bladder traps, and probably evolutionarily related to it. Outside of Genlisea, features reminiscent of lobster-pot traps can be seen in Sarracenia psittacina, Darlingtonia californica, and, some horticulturalists argue, Nepenthes aristolochioides.

Everything You Need to Know About Having a Part-Time Job

Everything You Need to Know About Having a Part-Time Job Don’t want to work full-time but aren’t sure what the alternative is? If you’re not exactly certain what a part-time job entails, hours-wise, here’s a primer to what you might expect. The HoursEssentially, a part-time job is a position that offers you flexibility- of scheduling or decreased hours. The number of hours varies from company to company: anywhere from 5 to 35 per week. The company has the discretion here, as to what they consider part-time. It isn’t regulated by the Fair Labor Standards Act- and the ACA only differentiates full from part-time work (at 30 hours per week) for the purposes of health insurance benefit eligibility.The  OpportunitiesThere is a bit of stigma attached to â€Å"part-time† work, making it seem as though it isn’t real work, but there are many professional gigs that fall under the part-time umbrella. It’s not just retail and hospitality either! It can be particularly useful for stay-at-home par ents, students, retirees, and any other workers who prefer not to have the time commitment of a full-time position.The PerksIt’s even occasionally possible to start with part-time employment and transition into full-time work at that company, if you play your cards right- making part-time work a useful way to get your foot in the door somewhere.It’s also possible to gain access to benefits- though not as extensive as full-time packages, and not universally.If you think part-time work might be an ideal situation for you at this stage in your career, try looking for positions that have flexibility and at least some baseline benefits. And remember, what works for you works for you. Don’t worry about what anybody else thinks.

Prosperos Mistakes in The Tempest by William Shakespeare Essay

Prosperos Mistakes in The Tempest by William Shakespeare - Essay Example He admitted to wrapping himself up in his studies, so that Antonio, in taking on the Duke's role, actually began to believe he was the rightful duke and that Prospero was incapable of ruling. Prospero seemed unaware of the idea that power can corrupt, as it did with Antonio. His brotherly love and trust blinded him to his brother's faults and actions until it was too late. He was complacent in his belief that his deputy and his team would always be there for him. But he did nothing to keep their loyalty or to lead that team. Antonio was greedy, ambitious and ruthless, using the King of Naples, Prospero's enemy, to help throw his brother and niece into exile. He loved power and looked for more. This showed on the island, when he plotted with Sebastian to kill old Gonzalo, who loved Prospero and stood in his way of taking over Naples. In exile, Prospero changed, he was forced to examine the situation and find the resources in himself and his environment in order to survive. He taught Miranda, and Caliban the monster, but always controlled them. Ariel, his spirit helper, might be seen as his deputy, but Prospero gave the orders, checked progress and examined the results of every activity with discussion and consultation. He took charge of an alien world and managed it so as to reach the desired outcomes. He no longer took anything on trust, but set tests and conditions, and gave explanations. As in the case of Ferdinand's love for Miranda; he tested him before giving consent to a betrothal. "I tender to thy hand. All thy vexations Were but trials of thy love," (Act 4, Sc.1, v. 5-6) His experiences in life had not made him bitter, he learned a great deal on the magic island away from the real world. But he wanted to be back in business, taking up his rightful role as the Duke of Milan. To do this, Prospero understood the need to show who was in charge, but at the same time, to put the past behind him and offer forgiveness. His management skills had developed to a point where he was capable of organizing everybody and everything to his satisfaction, in order to achieve the final result that he wanted, but with no hard feelings. He showed how he felt about it when he said: "Yet with my nobler reason 'gainst my fury Do I take part: the rarer action is In virtue than in vengeance;" (Act 5, Sc.1, v.25-28) In the end, Prospero had power as himself, without spirits or magic, having kept his word and set Ariel free. By forgiving his enemies, he showed himself to be a stronger leader than when he landed in exile. He had learned never to take anything or any person at face value, to look at people's characters and motives and to always maintain control. And finally, to move forward and work together. Works Cited Shakespeare, William. 1611. The Tempest. Penguin Shakespeare, Penguin Books London, New York. 2005. Name: Tutor: Class: Date: The Best

A Background on Egypt Essay Example | Topics and Well Written Essays - 1500 words

A Background on Egypt - Essay Example From the study it is clear that Egypt occupies a strategic position as it is a bridge between two continents and links two chief waterways, the Indian Ocean and the Mediterranean Sea. Its position demands that it dominates its environment otherwise it suffers from the victimization of foreign powers. Egypt survival depends on the Nile River. Indeed, the majority of the country’s citizens live near along the river where the only arable land is found, an area of about 15, 000 square miles. As the discussion declares the country is also considered to be in a very strategic position politically since it’s at the epicenter of three circles. These are the Arab, the African, and the Islamic people. The country considers itself playing a vital role in Africa as it was a major advocate of nonalignment and neutralism. With its strategic position, Egypt remains an important part of major powers’ plan to reach the Arab world. In spite of the country’s unbalanced outcome of its two referendums and parliamentary elections, it experienced a free and fair election for a period of 10 months from November 2011. The country’s politics became a tool through which contentious issues could be settled. During the 2012 elections, twenty-nine parties and several independent candidates competed for the 498 seats available in the People’s Assembly. With the eight political parties that competed in the elections, the Islamists won at least 83 percent of the 18 0 available seats.

Vanillin: Physiochemical Properties, Production and Uses

Vanillin: Physiochemical Properties, Production and Uses Vanillin (4-hydroxy-3-methoxybenzaldehyde) is an important flavoring agent mostly used in beverages, pharmaceutical industries, food products, etc. Naturally present as a vanillin glucoside in vanilla pods and used as an intermediate in the synthesis of some drugs. Vanillin possesses antimicrobial and antioxidant properties. In the past, production of vanillin is very expensive and a very long process. Vanillin was obtained from the oxidation of lignin, or from ferulic acid pathway or some other pathways. The chemical production of vanillin from various methods had been described. The method used in this research is High selectivity in the oxidation of Mandelic acid derivatives and in O-Methylation of Protocatechualdehyde. The starting material used here was catechol and nowadays this method is used for the industrial production of vanillin. The method used was tiresome but produces vanillin in good yield. The analysis of obtained vanillin was done by using Thin Layer Chromatography and Infrared Spectroscopy. Infrared spectrum of obtained product and reference spectrum of vanillin were compared. The similarity of melting points of the obtained product and vanillin from literatures shows that the product obtained can be confirmed as vanillin. Introduction Vanillin (4-hydroxy-3-methoxybanzaldehyde) is a main part of natural vanilla. It is a major flavouring agent used widely in the food and dairy products, beverages and pharmaceutical industries etc. It is an organic aromatic compound which contains three functional groups (aldehyde, phenol and ether). Vanillin is obtained from the beans or pods of Vanilla plant (Vanilla planifolia). Its origin is from the subtropical forests of Mexico and Central America. Mayan and Aztec civilizations are the first who discover the properties of vanilla. It was first extracted by Nicholas Theodore Gobley in 1858.1 Vanilla Planifolia Vanilla pods Vanilla beans In freshly harvested vanilla pods vanillin is binds with the ÃŽ ²-D-glycoside. Today vanillin is used in the preparation of many pharmaceutical preparations like Papaverine, Levodopa, Levomethyldopa and antimicrobial agent Trimethoprim and also for the production of herbicides and antifoaming agents. Vanillin also has properties like antioxidants and anti-tumor. Due to its aromatic properties it is widely used in the air fresheners, perfumes, incense and candle.1 Vanillin is extracted from the vanilla beans but due to its low natural production and high demand it is prepared by various synthetic methods like chemical synthesis, enzymatic synthesis etc.1 Physiochemical properties of Vanillin: Vanillin is a white crystalline powder which has a melting point about 820C. The purity is generally above 99.0% w/w on dried basis. Vanillin has a characteristic pleasant smell and taste for which it is widely used in the world. The boiling point of vanillin is about 1540C and its sublimation temperature is reported to be 700C. Vanillin starts to decompose at 1600C. Vanillin has a vapour pressure of 0.0022 hPa at 250C and 0.0017 hPa at 650C and saturated air has a concentration of 0.00029 % at 250C, corresponding to 18.0 mg/m3. The vapour density of vanillin is found to be 5.3 at 250C. Its apparent specific gravity is 0.6 kg/dm3. Specific gravity of vanillin is reported to be 1056 kg/m3 at 200C. Vanillin is soluble in water and its solubility increases with increasing temperature. Its solubility in water at 25Â °C was reported to be 10g/L. Vanillin was reported to be readily soluble in alcohol (ethanol). Also vanillin shows slight solubility in ethyl acetone, methanol, and diethyl ether. The Octanol/ Water partition coefficient was found to be 1.21 which indicates that vanillin is unlikely to bio accumulate. The pH of vanillin in water is 4.3. The phenol group of vanillin has a pKa value of 7.38. With increasing pH the molecule will lose a proton, become negatively charged and more soluble in water. Vanillin dissolves in dilute solution of alkali hydroxides.16 Production of vanillin: The production of vanillin is a very long and expensive process which involves large number of steps as well. The pollination of flowers has to be done manually as there is lack of natural pollinators. The flowers have to be pollinated within 24 hours to bear fruits. The vanilla beans require 10- 12 months to mature from the time of pollination. The matured vanilla beans are yellowish green, and are bitter in taste. The matured beans lack the characteristic vanilla flavour which only develops upon curing, which involves three steps. 1) Killing, the green beans are treated with variety of methods such as scalded with hot water, exposed to sun, wilted in the oven, scarred, treated with ethylene gas, or frozen to disrupt tissue integrity. The second method is the cheapest but most labour- intensive. In this step tissues completely lose their integrity, but still contains high amount of moisture which has to be removed by the sweating process. This step runs for 7-10 days, during moisture content of the beans reduced to 60- 70 %. After losing the moisture the beans turn dark brown in colour and start to develop their characteristic vanilla flavour. To reduce microbial spoilage and to concentrate the flavour, the moisture content were further reduced to 25- 30 %. After this step, the beans are stored in closed containers to reach their highest flavour content and then their conditioning is done either by hot water treatment or by sun drying.5 2) Process of curing and drying together requires 4-5 months. The cured beans pods may be covered with tiny crystals of vanillin. This coating is known as givre, which sometimes used as criterion for quality assessment.6 3) During the fermentation process, vanillin is released from its non-volatile glucoside by the action of vanilla ÃŽ ±-glucosidase on vanillin glucoside.3 Vanillin alone is not present in the extract of V. Plantifolia, some related phenylpropanoid (C3-C6) compounds [mainly p-hydroxybenzaldehyde(8.6%), vanillic acid (4.3%), p-hydroxybenzyl methyl ether (0.9%) ] are also present which gives the unique flavour to natural vanilla.7,8,9 However, vanillin has also been found to be present in traces amount in plants like tobacco, fruits and fruit products like orange, grapefruit, and tangerine. In mango, vanillin is present both as free vanillin and vanillyl glucoside. It is also reported to be present in elderberry juice, blueberries, orange juice, strawberries, passion fruit juice, leeches, and wines. It has also been found in diverse food products such as popcorn, extruded oat flour, apple cider brandy, commercial liquid smoke flavourings, mushrooms and chocolate.3, 10 Vanillin is added in the concentrations ranging from 1 to 26 milimolar in the food products which depend upon the nature of the product. Vanillin has a low flavor threshold value of 20Â µg/L in water at 20 Â °C.11Although more than 12000 tonnes of vanillin are produced each year only 1% of it comes from the natural sources and the rest are synthesized by chemical synthesis.12 Moreover, the high demand for vanillin and the fact that the vanillin derived from plants is relatively expensive ($1200- 1400 per kilo compared to synthetically produced which is