Abbreviation: Afr. J. Biotechnol.
Start Year: 2002
Page 1 of 596, showing 20 records out of 11909 total, starting on record 1, ending on 20
DOI: 10.5897/AJB2017.15969[Article Number: DCDD29866556]
A survey was conducted to determine the occurrence of sweet potato leaf curl virus (SPLCV) infecting sweet potato in Kenya. Vine cuttings of sweet potato were collected in 2011 from fields in Central, Western and Coastal regions of the country. The cuttings were grown in an insect-proof screen-house and scion grafted to Ipomoea setosa indicator plants. DNA was extracted from leaf samples of graft-inoculated I. serosa... Read more.
DOI: 10.5897/AJB2017.16037[Article Number: E83EF4166558]
Tannase (tannin acyl hydrolse, E.C.18.104.22.168) is an enzyme that catalyzes the hydrolysis of ester and depside bonds of hydrolysable tannins. Among the filamentous fungi the genus Penicillium is recognized as the second best producer of tannase. This enzyme presents applications in several industrial segments, such as in the production of judges and teas. The industrial production of tannase can be performed through solid... Read more.
DOI: 10.5897/AJB2017.16210[Article Number: E2B854966560]
The present study aims at optimizing the production of Saccharomyces cerevisiae SKM10 single cell proteins (SCP) from mango waste. To optimize the production process, the effect of two independent variables was evaluated by a three-level full factorial design using response surface methodology (RSM). The parameters studied were inoculum size (2 to 12% v/v) and concentration of substrates (5 to 10 g/L). Analytical... Read more.
DOI: 10.5897/AJB2017.16123[Article Number: 711521A66562]
The need to boost daily intake of natural antioxidants to combat free radicals causing degenerative diseases has become more imperative. Fermented locust bean condiment was fortified with moringa leaf powder (rich in antioxidants) at 20, 30 and 50% substitution levels. Proximate composition, phenolic content, total flavonoid, reducing power, and the sensory properties of the condiments were determined using standard... Read more.
DOI: 10.5897/AJB2015.14718[Article Number: B0469AE66540]
Anthuriums are among the most attractive ornamental plants; however, the commercial production of these plants is limited by the slow propagation methods presently in use. This situation can be resolved with the application of in vitro culture techniques which allow massive plant propagation through morphogenic processes. Plant growth regulators (PGR) and the composition of the basal media comprising the culture medium... Read more.
DOI: 10.5897/AJB2015.15018[Article Number: B50B5E666542]
Wheat is the most important cereal crop in Ethiopia ranking third in terms of area after teff and maize and second in terms of production after maize. Six local wheat varieties cultivated in South Gondar, one of the 11 zones found in Amhara region, were collected from the local farmers to study their variability, heritability and trait associations using 12 agro-morphological traits. The studied genotypes were grown in... Read more.
DOI: 10.5897/AJB2017.16203[Article Number: 5A07A0166544]
Salt stress is one of the major environmental constraints limiting agricultural productivity and influencing the concentration of bioactive compounds of vegetables. In this study, the effect of NaCl salt stress on nutrient contents of leaves in a cultivar of amaranth, an important leafy vegetable cultivated in some tropical regions worldwide, was evaluated. The experiment was carried out in a screen house at Center for... Read more.
DOI: 10.5897/AJB2017.16191[Article Number: CEA527066464]
The influence of boiling lima bean, using trona solution, on its phytochemical constituents and selected micronutrients was investigated. Lima bean was initially boiled for 3 h using 0.1, 0.2, 0.3, 0.4 and 0.5% trona solution, respectively at ratio 1:5 (bean/trona solution). The boiled lima bean was subsequently dried in an oven at 55°C for 12 h after which it was subjected to various analyses. Maximum reduction of... Read more.
DOI: 10.5897/AJB2017.16148[Article Number: 808739866466]
The microbial sources used for the production of nanoparticles are important, and one of the reasons for bacterial preference is their ease of manipulation and ecofriendly potential. Three bacteria strains of Streptomyces genus were used for the biosynthesis of silver nanoparticles (AgNPs). The aim of the present study was to confirm Streptomyces spp. as biological systems in the synthesis and extracellular... Read more.
DOI: 10.5897/AJB2016.15803[Article Number: D8F210966467]
The objective of this study was to optimize a protocol for in vitro micropropagation of selected grape vine varieties. Preliminary studies were conducted to optimize the duration of sterilization of the explants. For shoot initiation experiment nodes of the three varieties of grape vines were cultured on MS medium (Murashige-Skoog’s, 1962) supplemented with five different concentrations of 6-Benzylaminopurine... Read more.
DOI: 10.5897/AJB2017.16188[Article Number: B2CF6E366343]
This study investigated fungi and total aflatoxins quality of ogiri [fermented melon seed (Citrullus vulgaris] and fermented African oil bean seed (Pentaclethra macrophylla) consumed as soup condiment in Abakaliki, Ebonyi State, Nigeria. The ogiri samples were purchased from two major markets in Abakaliki metropolis [meat market (OM and UM) and rice mill market (OR and UR)]. The samples were screened for their pH... Read more.
DOI: 10.5897/AJB2017.16201[Article Number: F48723A66345]
Application of enzyme preparations has shown great potential in aiding extraction procedures. However, the focus has mostly been on single crop varieties, thereby limiting knowledge on the effects of enzyme technology to those (single) varieties studied. The present work compared the effects of various dosages of crude pectolytic enzymes from Saccharomyces cerevisiae (ATCC 52712) on yield and extraction rates of starch... Read more.
DOI: 10.5897/AJB2016.15705[Article Number: E011D5B66347]
Cheese whey is presented as an alternative for the production of ethanol to be a major source for growth of microorganisms, which catalyze lactose directly to ethanol and other products. Thus the aims of this study were to analyze the influence of nutrients in the cheese whey (15%w/v) fermentation by Saccharomyces fragilis IZ 275, to estimate the ethanol production and verify the repetition of the results of... Read more.
DOI: 10.5897/AJB2017.15996[Article Number: B23B33E66349]
The development of pelleted food–based vaccine against Newcastle disease (ND) using a thermostable NDVI2 strain in Acha (Digitalia iburua) is reported. The Acha cereal was subjected to rigorous processing of washing, soaking, boiling, roasting and grinding into fine powder prior to virus incorporation. The mixture which was passed through a locally fabricated pelleting machine resulted in fine pellets. The virus... Read more.
DOI: 10.5897/AJB2017.16222[Article Number: 5355F1566351]
The headspace of eight Algerian date varieties with low market value were analyzed for their aroma compounds using solid phase micro extraction and gas chromatography combined with mass spectrometry. In this study, 61 identified compounds were categorized in various chemical classes on the basis of their functional groups, alcohols, esters, aldehydes, terpenoids, ketones, hydrocarbons, and ethers. Twenty specific... Read more.
DOI: 10.5897/AJB2017.16212[Article Number: 61095B666257]
Rice is an important staple food crop that feeds over half of the global population and it has become the cereal that provides a major source of calories for the urban and rural poor in Africa. This research aimed to use simple sequence repeat (SSR) markers to evaluate the genetic diversity in rice (Oryza sativa and Oryza glaberrima) germplasm as breeding method. In the present study, 16 SSR markers were used across 48... Read more.
DOI: 10.5897/AJB2017.16214[Article Number: 48C7FC366259]
The aim of this study was to evaluate the effect of different process conditions, such as the sulfuric acid concentration, contact time, solid:liquid ratio and particle size, on the xylose recovery and the formation of by-products from oil palm empty fruit bunch (OPEFB) with dilute-acid hydrolysis. Moreover, an adapted and non-adapted strain of the yeast Candida guilliermondii was used to obtain xylitol from the optimal... Read more.
DOI: 10.5897/AJB2017.16164[Article Number: 92A4CB966264]
Pseudomonas putida is a well-known plant growth promoting bacterium (PGPB) with the capacity to improve plant growth. The objective of this study was to assess the effect of P. putida towards plant growth and its interaction with its microbial ecosystem. P. putida strain PF1P was isolated from the rhizosphere of banana plant (Musa species). The isolated P. putida strain PF1P possess ability to secrete acetic acid (42.1... Read more.
DOI: 10.5897/AJB2016.15813[Article Number: A9DB3EA66266]
Bacteriophage virolysins or lytic enzymes are bacterial peptidoglycan hydrolases responsible for lysing bacterial cells. Consequently, they are used as enzybiotics alongside with bacteriophage therapy to remedy multi-drug resistant Salmonella typhi. The objective of this study was to evaluate the potentiality of lytic bacteriophages and their virolysins in curing multi-drug resistant S. typhi. S. typhi was isolated and... Read more.
DOI: 10.5897/AJB2016.15830 [Article Number: 502357B66226]
Adsorption of methylene blue from aqueous solution using a low cost Sclerocarya birrea fruit shell powder based biosorbent was investigated in a batch system. Results showed that optimum adsorption capacity was achieved at pH 8 and biosorbent dosage of 0.6 g, with a maximum adsorption capacity of 27.690 mg g-1. Equilibrium studies showed that experimental data fitted well on the Temkin isotherm (R2 = 0.9641), as well as... Read more.
Page 1 of 596, showing 20 records out of 11909 total, starting on record 1, ending on 20