August 2012
Potato seed tuber production from in vitro and apical stem cutting under aeroponic system
Low productivity of potato in Malawi is mainly due to lack of quality seed tuber coupled with the absence of a potato seed certification programme which leads to farmers achieving less than 7 t ha-1 against potential yield of 40 t ha-1. With regards to this, an assessment of potato (Solanum tuberosum L) seed tuber production under aeroponics in Malawi was conducted in order to assess...
August 2012
Effects of NaCl on growth and activity of enzymes involved in carbon metabolism in leaves of tobacco (Nicotiana rustica)
The adverse effects of salt should not be the same in tobacco plants exposed to a permanent and transient high concentration of NaCl in its environment. Experiments were conducted in order to verify the hypothesis of reversibility of NaCl effects. The study of this reversibility is checked by monitoring a number of parameters in pre-stressed plants and then, replaced in normal conditions. Plants previously...
August 2012
In vitro multiplication of Protea cynaroides L. microshoots and the effects of high phosphorous concentration on explant growth
Protea cynaroides L. is a slow-growing, difficult-to-propagate plant. Due to problems such as phenolic browning and their sensitivity to the phosphorous nutrient, in vitromultiplication of P. cynaroides explants have not been successful. The present study was conducted to induce shoot proliferation of established P. cynaroidesmicroshoots, and investigate the effects of high...
August 2012
Phenotypic diversity for symbio-agronomic characters in Ethiopian chickpea (Cicer arietinum L.) germplasm accessions
Breeding chickpea (Cicer arietinum L.) cultivars combining desirable symbiotic and agronomic characters has both economic and ecological significance. An experiment was conducted at Ambo and Ginchi, Ethiopia, in 2009/10 to characterize and evaluate 155 genotypes of chickpea for symbiotic and agronomic performance. A randomized complete block design with four replications and the difference technique,...
August 2012
An efficient plant regeneration protocol from petiole explants of physic nut (Jatropha curcas L.)
Efficient and reproducible method for the in vitro regeneration of Jatropha curcasplants has been developed through direct shoot buds induction from petiole explants on Murashige and Skoog (MS) basal medium supplemented with differentconcentrations of thidiazuron (TDZ). The highest percentage of shoot buds induction (64.0%) was observed on MS medium supplemented with 0.52 mgL-1 TDZ...
August 2012
Hydrocarbon-degrading bacteria isolation and surfactant influence on the growth of organisms: A case study in Ibadan, Nigeria
Hydrocarbons are substantially insoluble in water, often remaining partitioned in the non-aqueous phase liquid (NAPL). However, there had been little or no attempts to advance the bioavailability of hydrocarbons through the use of surfactants. This study was conducted based on the need to isolate hydrocarbon degrading bacteria and to establish the effect of surfactants on the growth of organisms. Ten...
August 2012
The effects of residual blood of carcasses on the microbiological quality of poultry
To prove the residual blood factors that are responsible for high contamination of carcasses, this study was conducted to compare the microbial level in poultry both perfectly and imperfectly bled. At 3°C storage temperature, the average number of bacteria of perfectly bled poultry was 7.05 × 102 ufc/g which was significantly (P≤ 0.05) lower than the average number of bacteria of...
August 2012
Influence of wheat bran as a silage additive on chemical composition, in situ degradability and in vitro gas production of citrus pulp silage
The effect of wheat bran (WB) as a silage additive on chemical composition, in situdegradability and in vitro gas production of citrus pulp silage (CPS) was investigated.The whole fresh citrus pulp was manually chopped and used as untreated or treated with 6, 12, or 18 g WB/kg fresh citrus pulp for ensiling. The data were analyzed in a completely randomized design that showed...
August 2012
Potential of Klebsiella oxytoca for 1,3-propanediol production from glycerol under excess substrate conditions
Glycerol, a by-product of biodiesel, is a source of carbon for the bioproduction of chemical intermediates with high commercial value, such as 1,3-propanediol. One strain of Klebsiella oxytoca, isolated from soil samples, was tested to determine its potential to produce 1,3-propanediol through fermentation of a glycerol solution, under excess substrate conditions. The microbial growth curve was evaluated...
August 2012
Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase
This work examined the effects of reaction conditions on ring opening polymerization of poly(ε-caprolactone) (PCL) by Candida antarctica lipase B (Novozym 435) as the catalyst. Different reaction mediums were obtained by changing of temperature, reaction time and solvent types simultaneously. The main purpose of this study was to observe molecular weight distribution, conversion rates, and...
August 2012
Phytochemical and nutrient compositions of the leaves of Ocimum canum Sims
Ocimum canum Sims is an underutilized medicinal plant that grows in south-western Nigeria. The leaf is used for the treatment of gastrointestinal problems and also for the preparation of local soups. The phytochemical and nutrient compositions of its leaves were investigated using established analytical procedures. The phytochemical analysis of the plant revealed high concentrations of flavonoids...
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