Abbreviation: Afr. J. Biotechnol.
Start Year: 2002
Page 1 of 591, showing 20 records out of 11806 total, starting on record 1, ending on 20
DOI: 10.5897/AJB2017.16027[Article Number: A6956BD64475]
Pseudomonas aeruginosa is intrinsically resistant to several antimicrobial drugs classes. Various extended-spectrum beta lactamases (ESBL) types have been found in P. aeruginosa such as Pseudomonas extended resistance (PER) and Guiana extended-spectrum (GES) enzymes. The study aimed to evaluate the susceptibility of the ESBL producing P. aeruginosa strains that express blaGES and blaPER genes to commonly used... Read more.
DOI: 10.5897/AJB2016.15262[Article Number: 29730E464477]
Eleusine coracana is an annual allotetraploid (2n=4x=36) that belongs to grass family, Poaceae. This research aimed to investigate level of genetic diversity of 80 accessions using ISSR markers. DNA was extracted from a bulk of three plants per accession using a modified CTAB method. Six ISSR primers amplified a total of 45 clear and reproducible bands. The total genetic diversity (H) and Shannon’s diversity... Read more.
DOI: 10.5897/AJB2017.15984[Article Number: 0B84F5D64479]
A Gram-positive, rod-shaped, spore-forming haloalkaliphilic bacterium designated as NA7 was isolated from the surface of a Helianthemum nummularium root sample obtained from Wadi Natrun in Egypt. Sequence analysis of the 16S rRNA gene revealed a Bacillus haloalkaliphilius strain as the closest match with 99% identity. In a shake flask culture containing 10% NaCl, adjusted to pH 10 and incubated at 37°C, the isolated... Read more.
DOI: 10.5897/AJB2016.15828[Article Number: 93BC9D964481]
In order to obtain a native isolate with high β-fructofuranosidase activity (FFase), a preliminary selection of 44 isolates, predominantly formed by Aspergillus niger (72%), was performed among 167 isolates of Aspergillus native to the Peruvian coast (Casa grande, Cartavio, Paramonga and Tacama). In addition, genetic diversity was studied using molecular markers, Inter Simple Sequence Repeats (ISSR). The... Read more.
DOI: 10.5897/AJB2017.15892[Article Number: E4DF6A764483]
Caatinga biome features species with high therapeutic potential such as Aroeira do Sertão (Myracrodruon urundeuva Allemão) which has long history in folk medicine. This study aimed to chemically characterize the secondary metabolites of hydroethanolic extract and hexane, chloroform, acetate, hydroethanolic fractions from Myracrodruon urundeuva (Allemão) possibly responsible antioxidant and... Read more.
DOI: 10.5897/AJB2017.15960[Article Number: 2EB012464485]
In this work, the degradative abilities of some bacteria isolated from the soil were studied. Five distinct isolates were subjected to substrate susceptibility test to determine their potential degradative abilities in the presence of different hydrocarbons. The best three crude oil degraders were selected and their identities were further established using API technique. Furthermore, the extent of each degradative... Read more.
DOI: 10.5897/AJB2016.15613[Article Number: B05343C64272]
Among many species of passion fruit, the bush passion fruit (Passiflora cincinnata Mast.) is a wild, edible fruit, of exotic flavor and has good acceptability for consumption. This study aimed to determine the physico-chemical characteristics of the bush passion fruit pulp, and to produce and characterize physico- chemically the ale beer made with bush passion fruit as a malt adjunct, using different percentages (10,... Read more.
DOI: 10.5897/AJB2016.15783[Article Number: 9F56ED264279]
The objective of this research was to obtain quantitative growth hormone gene polymorphism association between growth hormone gene genotype with quantitative characteristics of the thin-tail sheep in the highlands and lowlands of Jambi Province. Two phases of research were done on the field and in the laboratory. Field research which was conducted to obtain the quantitative characteristics data includes; withers height... Read more.
DOI: 10.5897/AJB2017.15905[Article Number: 670A81264285]
Sri Lankan soil is a rich source of fungi with new strains that are not well explored to date. In the present study, a total of 83 soil fungi were isolated from different locations of Sri Lanka using chitin and β-1,3-glucan selective media. Of the 83 isolates, 22 isolates showed high biocontrol activities against seven selected plant pathogenic fungi in dual culture plate assay. These 22 isolates were further... Read more.
DOI: 10.5897/AJB2016.15812[Article Number: 1C3CD0564290]
In this work, the adsorption of benzene, toluene and p-xylene on activated carbon was verified through a computer simulation. A carbon model was used as the work basis. Several steps were completed from the modeling of the carbon structures and pollutants to simulations of molecular dynamics. After analyzing the results, it was found that the groups: ether, lactone and carbonyl (ketone) present in the carbon structure... Read more.
DOI: 10.5897/AJB2016.15370[Article Number: 00F488764293]
The present research evaluated the redox ability of Cr6+ in the earthworm Eisenia foetida, and its effects on growth and survival. An assay was conducted with an increasing doses of K2Cr2O7 (0, 200, 400, 800, 1000, and 1200 mg K2Cr2O7 kg-1 substrate) applied to a vermicomposting system which was inoculated with 30 earthworms per chamber. Earthworm growth, estimated by weight, showed a quadratic response (p = 0.03) with... Read more.
DOI: 10.5897/AJB2016.15657[Article Number: AA1CC3164301]
Phytates and tannins are present in varying proportions in legume based foods. Investigation on the effect of cooking on tannins and phytates was carried out on thirty eight raw and cooked bean (Phaseolus vulgaris) varieties. Tannins were assayed by vanillin-hydrochloric acid method, while phytates were determined by a method developed by Haugh and Lantzsch. There was a very high significant difference (P≤0.00001) in... Read more.
DOI: 10.5897/AJB2016.15564[Article Number: E23F9B164305]
The advent and application of molecular markers technology enabled dissection of genomic regions underling important agronomic traits in crop plants. Isolation of sufficient quantity and good quality DNA from a large number of plant samples is a major challenge in most genetic and genomic analyses. Wheat is the world’s third most important food security crop on which most molecular breeding and genetic engineering... Read more.
DOI: 10.5897/AJB2016.15823[Article Number: B1CEB3A64166]
Heavy metals are transition elements whose presence at mild doses in water bodies is deadly. Most effectively harnessed technique of their remediation is the microbial approach, also known as bio-remediation. This study is hereby aimed to investigate the potential of Klebsiella species isolated from diesel polluted soil in bioremediating the heavy metals present in effluent water. A sample of diesel polluted soil... Read more.
DOI: 10.5897/AJB2017.15924[Article Number: 59E6FE664170]
Lipases catalyze the hydrolysis of long chain triglycerides. Microbial lipases are receiving much attention because of their industrial potential in the chemical, pharmaceutical, medical, cosmetic, biosurfactant synthesis, leather industries, mutation, agrochemicals and paper manufacturing industries. This article presents the isolation of maximum lipase producing bacteria and the optimization of different conditions... Read more.
DOI: 10.5897/AJB2017.15949[Article Number: 3CA635864172]
Acceptance of green tea, a health promoting functional food material, could be increased if its flavor is improved. Persimmon seeds and leaves are likely potential options for green tea improvement since they contain a large number of volatile flavor compounds. In the present study, amino acids, volatile flavor compounds, and antioxidant potentials of persimmon tea (PT) prepared with green tea were investigated. PT... Read more.
DOI: 10.5897/AJB2017.15913[Article Number: 6E55A7164174]
Toubani is a traditional ready-to-eat legume food, consumed as staple food with stews. This study investigated the socio-cultural profile of stakeholders, the traditional processing techniques and sensory quality attributes. For this purpose, a survey was carried out in two municipalities using a questionnaire managed to stakeholders. The results showed that toubani production is exclusively undertaken by women while... Read more.
DOI: 10.5897/AJB2017.15958[Article Number: 28F354964176]
Tannase is an inducible extracellular enzyme produced by filamentous fungi, yeasts, and bacteria by solid-state fermentation (SSF) or submerged fermentation (SmF). Among the filamentous fungi, Aspergillus and Penicillium are recognized as the most efficient producers of tannase. The aims of this study were to evaluate the production of tannase under SSF by isolation from Aspergillus and Penicillium preserved in the... Read more.
DOI: 10.5897/AJB2016.15751[Article Number: 79EE2BB64180]
The present work aims to identify common bean accessions resistant to anthracnose by incompatibility reaction evaluations to races 73 and 2047 of C. lindemuthianum, associated with using of SF101072 and SAS13950 molecular markers linked, respectively, to gene Co-10 and allele Co-42. A total of 75 common bean accessions from Common Bean Germplasm Bank (CBGB) of Núcleo de Pesquisa Aplicada à Agricultura... Read more.
DOI: 10.5897/AJB2015. 14937[Article Number: 9C6BD0064047]
Phenotypic, genetics and environmental trends of birth (BW), weaning (WW) and one year weight (YW), and average daily gain were considered on data collected from Horro cattle and their crosses during the year 1980-2008. Estimated breeding value (EBV) of all animals were generated from a univariate model analysis by the general linear mixed model by residual maximum likelihood (ASREML) while least square means for annual... Read more.
Page 1 of 591, showing 20 records out of 11806 total, starting on record 1, ending on 20