Tuesday, May 3, 2016

Senna siamea

Senna siamea (Thai: ขี้เหล็ก, khilek), also known as Siamese cassia, kassod tree, cassod tree and Cassia tree, is a legume in the subfamily Caesalpinioideae. It is native to South and Southeast Asia, although its exact origin is unknown.

It is a medium-size, evergreen tree growing up to 18 m with beautiful yellow flowers. It is often used as shade tree in cocoa, coffee and tea plantations. In Thailand it is the provincial tree of Chaiyaphum Province and some places in the country are named after it.

Leaves are alternate, pinnately compound, with slender, green-reddish, tinged axis and 6 to 12 pairs of leaflets on short stalks, rounded at both ends.

Uses
This plant has medicinal value and it contains a compound named Barakol. The leaves, tender pods and seeds are edible, but they must be previously boiled and the water discarded. They are used in Burmese and also in Thai cuisine where one of the most well-known preparations is Kaeng khilek (Thai: แกงขี้เหล็ก).

Other uses include as fodder plant, in intercropping systems, windbreaks, and shelter belts.

Thursday, April 28, 2016

Kaffir lime

Kaffir lime
The kaffir lime (Citrus hystrix), sometimes referred to in English as the makrut lime or Mauritius papeda,is a citrus fruit native to tropical Asia, including India, Nepal, Bangladesh, Thailand, Indonesia, Malaysia and the Philippines.

Its fruit and leaves are used in Southeast Asian cuisine and its essential oil is used in perfumery.

Common names
In English it is known as kaffir lime (also transliterated "kieffer lime") or makrut lime (magrood lime). The Oxford Companion to Food recommends that the term "makrut lime" be favored over "kaffir lime" because Kaffir is an offensive term in some cultures and has no contemporary justification for being attached to this plant. The etymology of the name "kaffir lime" is uncertain, but most likely was used by Muslims as a reference to the location the plant grew, which was populated by non-Muslims. The Arabic word for non-Muslims is Kafir.


Description
Citrus hystrix is a thorny bush, 6 to 35 feet (1.8 to 10.7 m) tall, with aromatic and distinctively shaped "double" leaves.These hourglass-shaped leaves comprise the leaf blade plus a flattened, leaf-like stalk or petiole). The fruit is rough and green; it is distinguished by its bumpy exterior and its small size (approx. 4 cm (2 in) wide).


Uses

Cuisine
The leaves are the most frequently used part of the plant, fresh, dried, or frozen. The leaves are widely used in Thaiand Lao cuisine (for dishes such as tom yum), and Cambodian cuisine (for the base paste "krueng"). Kaffir/Makrut lime leaves are used in Vietnamese cuisine to add fragrance to chicken dishes and to decrease the pungent odor when steaming snails. The leaves are used in Indonesian cuisine (especially Balinese cuisine and Javanese cuisine), for foods such as soto ayam, and are used along with Indonesian bay leaf for chicken and fish. They are also found in Malaysian and Burmese cuisines.In South Indian cuisine it is used widely.

The rind (peel) is commonly used in Lao and Thai curry paste, adding an aromatic, astringent flavor.The zest of the fruit is used in creole cuisine to impart flavor in "arranged" (infused) rums in Martinique, Réunion and Madagascar. In Cambodia, the entire fruit is crystallized/candied for eating.

Medicinal
The juice and rinds are used in traditional medicine in some Asian countries; the fruit's juice is often used in shampoo and is believed to kill head lice.

Other uses

The juice finds use as a cleanser for clothing and hair in Thailand and very occasionally in Cambodia. Lustral water mixed with slices of the fruit is used in religious ceremonies in Cambodia.

Cultivation
Citrus hystrix is grown worldwide in suitable climates as a garden shrub for home fruit production. It is well suited to container gardens and for large garden pots on patios, terraces, and in conservatories.

Main constituents
The compound responsible for the characteristic aroma was identified as (–)-(S)-citronellal, which is contained in the leaf oil up to 80%; minor components include citronellol (10%), nerol and limonene.

From a stereochemical point of view, it is remarkable that kaffir/makrut lime leaves contain only the (S) stereoisomer of citronellal, whereas its enantiomer, (+)-(R)-citronellal, is found in both lemon balm and (to a lesser degree) lemon grass, (note, however, that citronellal is only a trace component in the latter's essential oil).

Kaffir/Makrut lime fruit peel contains an essential oil comparable to lime fruit peel oil; its main components are limonene and β-pinene.