AgriEarth

Wednesday, March 14, 2007

VANILLA




VANILLA
Vanilla is a flavoring derived from orchids in the genus Vanilla. The name came from the Spanish word "vainilla", meaning "little pod".



Artificial Pollination


A simple and efficient artificial pollination method was introduced in 1841 by a 12 year-old slave named Edmond Albius on Réunion, then a French colony, in the Indian Ocean. This method is still used today. Using a bevelled sliver of bamboo, an agricultural worker folds back the membrane separating the anther and the stigma, then presses the anther on the stigma. The flower is then self-pollinated, and will produce a fruit. The vanilla flower lasts about one day, sometimes less, thus growers have to inspect their plantations every day for open flowers, a labor-intensive task.The fruit (a seed pod), if left on the plant, will ripen and open at the end; it will then exhaust the distinctive vanilla smell. The fruit contains tiny black seeds which carry no vanilla flavor. These black seeds are the tiny black specks found in dishes prepared with whole natural vanilla.Like other orchids, vanilla seed will not germinate without the presence of certain mycorrhizal fungi. Growers reproduce the plant by cutting: they cut sections of the vine with six or more leaf nodes, which have a root opposite each leaf. The lower two leaves are removed and this portion is covered in loose soil at the base of the support tree or post. The remaining upper roots will cling to the support and often will eventually also grow down into the soil. Growth is rapid under good conditions.


Preparation and Storage



Vanilla extract is made by percolating alcohol and water through chopped, cured beans, somewhat like making coffee. Vanilla extract is very powerful, a few drops sufficing for most uses. Vanilla bean is a bit more time consuming to use than the extract, but imparts the stongest vanilla flavour without the alcohol of extract.To flavour a liquid base for creme sauces, puddings, ice creams, etc., allow one bean per pint to steep in the liquid by boiling and allowing to cool for an hour before removing the bean. This can be repeated a few times if the bean is washed after use, dried and kept airtight. Ground vanilla can also be used, but use half as much and leave in the liquid. Many recipes call for slitting the bean lengthwise and scraping out the tiny black seeds. Airtight storage is necessary, otherwise the aroma will dissipate. A good way to store whole vanilla is to bury it in sugar. Use a jar with a tight-fitting lid that will hold about a pound of sugar, burying the bean so that no light can reach it. After 2 -3 weeks the sugar tastes of vanilla and can be used in coffee or in other recipes and the bean can be removed for other uses and returned to the sugar after cleaning. Keep topping up the sugar.


Culinary Uses



Vanilla’s mellow fragrance enhances a variety of sweet dishes: puddings, cakes, custards, creams, soufflés and, of course, ice cream. Classic examples include crème caramel, peach Melba and apple Charlotte. Vanilla flavour is detectable in many chocolate and confectionery items and several liqueurs such as Crème de Cacao and Galliano.


Attributed Medicinal Properties



From the time of the Aztecs, vanilla was considered an aphrodisiac. This reputation was much enhanced in 1762 when a German study found that a medication based on vanilla extract cured impotence — all 342 smiling subjects claimed they were cured.It was also once believed that vanilla was a febrifuge, used to reduce fevers, though it is rarely used for any medicinal purposes other than as a pharmaceutical flavouring.


Plant Description and Cultivation



Vanilla is a tropical climbing orchid, with a long green fleshy stem that sprouts roots that cling to trees parasitically. Its yellow or orange orchidaceous flowers grow in bunches, which bloom one flower each day, opening one by one during the two month season. Vanilla is a tropical crop and cannot grow naturally in temperate climates. When cultivated the vines are trained using posts and support trees.In nature they are only pollinated by Mexican bees and hummingbirds that are capable of penetrating a tough membrane that separates the plant’s pistol and stamen. European entrepreneurs had transplanted vanilla to grow in other tropical locations but could not get them to produce the pods. It wasn’t until 1836 that a botanist from Belgium, Charles Morren, recognized that the flowers were not being pollinated and would require some human assistance. In 1841, Edmond Albius, a former slave, on the French Island of Réunion, perfected a method to artificially fertilize the short-lived vanilla flower using a thin bamboo skewer to lift the membrane and use his thumb to smear the pollen. This gave great impetus to vanilla bean husbandry, and the method is still used today.The pods take about nine months to mature and are harvested when the tips begin to turn from yellow. Until recently, the curing process was long and complicated. The beans are first wrapped and subjected to high temperature and humidity to ‘kill’ the vegetative life. The next process involves alternate drying in the sun by day and sweating by night for several days. At this point the beans are dark, oily and pliable and are then slowly dried in the shade for up to two months. They are then sorted and graded and placed in chests for a further conditioning period of one or two months.

ABOUT GINGER


GINGER
Ginger has been used in ancient India both for culinary and medicinal purposes. For the household cooking, it is the fresh rhizome that is commonly used. For medicinal
uses, however, the common form used is the dry ginger. In ayurvedic system system the mixture of three spices, viz black pepper, long pepper and ginger forms the famous Trikatu. Ginger is also popular in the cooking of Western and other cultures and finds reference in ancient literature as well as in the records of Marco Polo and Vasco da Gamma.

Ginger is a rhizome of the ginger plant. It is cultivated throughout the world for local culinary needs. But the countries which have excess, process it in dried form and export. The major producers of dry ginger are India, China, Nigeria, Sierra Leone, Jamaica etc. In the world trade Jamaican ginger is rated high (but the production is very limited), with India’s Cochin ginger coming closely. Nigerian is also now regarded nearly as good, but with slightly different note. China produces lot of ginger, but the dry ginger is generally regarded as inferior in flavour. Australia grows ginger with lemony flavour. The harvesting is done a ginger is preserved in either brine or syrup.
Ginger oil can made by steam distillation. The typical aroma cannot be attributed to any single compound. It is a combined effect. Dry ginger yields 1 to 2 % oil and 5 to 6% oleoresin when extracted with organic solvent. The hotness of ginger is caused by gingerols which consists of true gingerols, shogaols, zingerone and paradols. The latter compounds are mainly formed from true gingerols during processing and heat treatment.
Ginger is used in culinary practices. Among the processed food, it specially finds use in soft drinks and baked products, besides use in meat, sea food and vegetable curries.