Fulltext – Functional Properties of Bitter Yam (Dioscorea dumetorum) as Influenced by Soaking Prior to Oven-drying. The plant is often purposely grown at spare points on the land as an insurance against famine years, and is also encouraged in hedgerows around a farm and. Notes. BRIEF DESCRIPTION A climbing vine with robust, spiny stems reaching up to m in length. The leaves are trifoliate with ovate leaflets, cm long.

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The stems are thin, usually mm in diameter, and vary from smooth to prickly. Some may be harvested then and stored if so wished while the remainder are harvested after months.

Potentials of Trifoliate Yam (Dioscorea dumetorum) in Noodles Production

Le durcissement de Dioscorea dumetorum au Cameroun. Council for Scientific and Industrial Research, pp. In the south-western Nigeria, bitter yam is utilized in the treatment of malaria Dike et al. Rots caused by fungi see Pests and diseases may be rapid, destroying a tuber within a week or two.

Pratylenchus coffeae, causing diocsorea similar lesions, has been reported to attack yams in Puerto Rico, Jamaica and the Solomon Islands, while the root knot nematodes, Meloidogyne spp. In dumetoruum, several Dioscorea spp.

Currently, it seems that it should have a future in the home plot or gardens rather than commercial production. The preparation of ubi powder. Botanical name Dioscorea esculenta Lour. In the Pacific Islands specially constructed thatched huts with a raised platform, on which the yams are stacked, are used.


Processing Fufu-is prepared by cutting peeled yams into small pieces and boiling in water until soft, then pounding in a mortar until a sticky dough is formed, which is usually firm enough to be cut into slices.

Functional properties of pigeon pea Cajanus cajan predicted using response surface methodology. Special features Tubers-an approximate analysis of the tubers has been given as: This represented a relative increase by 1. The tube was then removed, wiped dry on the outside and cooled to room temperature. The free water supernatant was decanted from the wet sample, drained for 10 minutes and the wet sample was then weighed.

Some varieties may need detoxification by soaking or boiling before they are eaten.

Aerial tubers or bulbils are usually plucked by hand from the vine as required. Transforming its tubers into edible flour constitutes a means of conferring a long—term value onto it.

From West Africa they spread to Brazil and the Caribbean presumably by way of the slave shipsand are important in Jamaica, Puerto Rico and the French West Indies, but not in the other islands. There were subjected to one-way analysis of variance ANOVAmeans were separated using Duncan multiple range test at 0. Chemical Abstracts, 68, The occurrence of Dioscorea spp. Effect of traditional processing on the functional properties of cowpea Vigna cajan flour. There seems to be little scope for expansion of exports or of processed products, mainly because of the high cost of the raw material.


Bitter yam (Dioscorea dumetorum)

It is by far the most important of the indigenous American yams. The implication of this is that soaking time is very critical to the achievement of optimum bulk density for the bitter yam flour. This African species is closely related to the Asian species D.

A food for all seasons. Research Article Open Access. The tubers are lifted by fork or other digging tool or may be left for several months in dumeforum soil until needed.

This species appears not to be liable to chilling injury, so refrigerated storage might be a possibility, but this aspect needs further investigation. The optimum cooking time and cooking loss were in the ranges 5. Pests and diseases In addition to yam beetles and scale insects see Yam the larvae of three species of Lepidoptera dioscorrea the greater yam; they are Loxura atymnus, Theretra nessus and Tagiades gana.