Abbreviation: Afr. J. Biotechnol.
Start Year: 2002
Page 1 of 590, showing 20 records out of 11788 total, starting on record 1, ending on 20
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.
DOI: 10.5897/AJB2017.15910[Article Number: 982454764051]
Rift Valley fever (RVF) is a mosquito-borne disease that affects humans and livestock. It results in economically disastrous livestock deaths in Africa. The causative agent is RVF virus (RVFV), which possesses a tripartite negative-sense, single-stranded RNA genome, with large (L), medium (M) and small (S) segments. The lack of effective vaccines and anti-RVFV therapies motivates concerted efforts in search for safe and... Read more.
DOI: 10.5897/AJB2017.15939[Article Number: 16A399A64053]
Morphology, stages of maturation and histology of gonads of African pike, Hepsetus odoe from Ado Ekiti Reservoir were studied from August 2014 to July 2015 in order to establish its reproductive biology. Out of 685 specimens examined 354 were males and 331 were females giving a sex ratio of 1:1.1 (female:male). There was no significant difference (P>0.05) in the sex ratio. The gonads were in pairs. All the gonad... Read more.
DOI: 10.5897/AJB2015.14975[Article Number: F12241F64055]
African black soap is an indigenous African organic soap formed by esterification. This was prepared by reacting palm kernel oil and the filtrate of cocoa pod ash. Chemical analyses revealed the moisture content was 26% (w/w), total fatty matter (TFM) was 44.75% (w/w), total fatty alkaline (TFA) was 0.22% (w/w), total alkaline (TA) was 11.78% (w/w) and pH was 10. The metal complexes were formed by the reaction of the... Read more.
DOI: 10.5897/AJB2017.15911[Article Number: 12183F164057]
This work aimed to develop an efficient L-leucine industrial production strain of Corynebacterium glutamicum by using metabolic engineering. A recombinant C. glutamicum strain was constructed by expressing a feedback-resistant leuA-encoded 2-isopropylmalate synthase (IPMS) that carries three amino acid exchanges (R529H, G532D and L535V) from the mutant strain C. glutamicum ML1-9 which was obtained by screening for... Read more.
DOI: 10.5897/AJB2017.15918[Article Number: 314492864061]
Changing climate means that there will be more episodes of drought, especially in arid regions. Drought stress is an important environmental factor that reduces crop productivity. Despite the vast amount of literature on drought stress in plants, there are still many uncertainties concerning the molecular responses under water deficit. In particular, if we wish to breed plants that are able to tolerate stress,... Read more.
DOI: 10.5897/AJB2017.15971[Article Number: 0374B3664067]
Reforestation of native Acacia confusa Merr. on landslide areas in Taiwan is important for agroforestry and soil conservation. To ensure high survival and growth vigor, A. confusa seedlings must develop a strong root system. Inoculating of acacia with symbiotic nitrogen-fixing bacteria (NFB) may ameliorate the problems associated with soil nutrient deficiency on landslide sites. In this study, under plastic house... Read more.
DOI: 10.5897/AJB2017.15907[Article Number: B9AC9F464069]
The analysis of coccal lactic acid bacteria (CLAB) strains for their competence in polysaccharide production has been given proper attention as texturing and thickening agents. The characterization of these strains has been performed from two natural environments (camel milk and red meat). All the isolates were evaluated for exopolysaccharides (EPS) production on certain solid medium and ruthenium red milk agar plate.... Read more.
DOI: 10.5897/AJB2016.15841[Article Number: A4BB53964073]
This study investigated the proximate composition, microbial safety and heavy metal contaminations of garri: a cassava ready-to-eat food product. Garri is prepared from Manihot esculenta Crantz tubers by peeling, washing and grating of the tubers and fermentation. Production, storage and selling locations could be necessary predictors of the quality and safety of garri. A total of two hundred and sixteen (n=216) samples... Read more.
DOI: 10.5897/AJB2016.15512[Article Number: 1030A0364075]
Helicoverpa armigera caterpillar causes serious economic crop losses in Brazil, mainly in the corn, cotton and soybean farming. The aim of this study was to compare the efficiency of bioinsecticide Spinosad in the form of suspension capsules and emulsifiable concentrate in the dosage of 48 g i.a. ha-1 for control of H. armigera. The experiment was conducted in three different groups treated separately with emulsifiable... Read more.
DOI: 10.5897/AJB2016.15443[Article Number: 2DAE31763964]
Some creatures are very sensitive to water borne pollutants and can be used as useful bio-indicators of water pollutions. The present study used these bio-indicators to determine the status regarding health of freshwater habitats. The study was carried out to quantify Zn in kidney and liver of Rana tigrina from different aquatic habitats (canal, fish pond and sewage water) by atomic absorption spectrometry (AAS). Liver... Read more.
DOI: 10.5897/AJB2016.15822[Article Number: 174B74563965]
This study aimed to evaluate the changes in the phenolic oxidation mediated by polyphenol oxidase (PPO) and peroxidase (POD) in the quality of minimally processed ‘baby cassava’, during the first hours and days of conservation at different temperatures. Pieces of roots of cassava cv. Recife were minimally processed into ‘baby cassava’ form and kept at 5 ± 2 and 25 ± 2°C for 12h... Read more.
DOI: 10.5897/AJB2016.15826[Article Number: 24F93DE63967]
Simira gardneriana is a Rubiaceae species commonly found in the Brazilian Northeast region, presented several therapeutic and biotechnological applications. In this paper, the antioxidant and photoprotective properties of extracts from the seeds of S. gardneriana were highlighted. The antioxidant activity of ethanol and methanol extracts (Si-EtOH and Si-MeOH, respectively) was determined, using... Read more.
DOI: 10.5897/AJB2016.15625[Article Number: D24773063969]
Agrobacterium mediated plant transformation is a useful technique for stable transformation of plants. This study aimed at stable transformation of the beta tubulin (β) gene promoter and its expression analysis by histochemical GUS assay. The beta tubulin promoter sequence was cloned in plant expression vector (pGA482) and transformed stably in tobacco through Agrobacterium mediated transformation. The stable GUS... Read more.
DOI: 10.5897/AJB2017.15890[Article Number: D6FDB4463972]
Jatropha curcas is an interesting alternative for biodiesel production due to the high oil content in its seeds, its ability to grow in a wide range of climate and soil conditions as well as low cost of production. However, the species is considered to be in domestication and there are no defined cultivars. Therefore, it is extremely important to understand the genetic diversity of the species for selection and... Read more.
DOI: 10.5897/AJB2017.15945[Article Number: B0470C063974]
Lippia alba essential oils were obtained by hydrodistillation (HD) and supercritical fluid (SFE) extraction methods. These were analyzed by gas chromatography-mass spectrometry-flame ionization detector (GC-FID-MS). Antioxidant activity was tested by DPPH and ABTS methods, and total soluble phenolics (TSP) were also determined. While in the SFE extract 14 compounds were identified (mostly: myrcenone 3.4%,... Read more.
DOI: 10.5897/AJB2016.15856[Article Number: B12EFAA63976]
This study investigated the flow behaviour of some food gruels obtained from pre-treated banana, sorghum or sesame flours. The Herschel-Bulkley and the power law models were used to evaluate the consistency and flow indices while an Arrhenius-type equation was used to analyse the effect of temperature on viscosity. The Ostwald de Waele model gave a good fit with experimental data, with p-values less than 0.01 and R2... Read more.
DOI: 10.5897/AJB2017.15908[Article Number: E7D379D63978]
The objective of this work was to select the most active Bacillus thuringiensis (Bt) isolated from agricultural soils of Mali through the molecular characterization and the determination of insecticidal activities of the protein crystals, produced by these native isolates. Crystal proteins were extracted from B. thuringiensis culture, and characterized using the SDS-PAGE techniques. Their insecticidal activities were... Read more.
DOI: 10.5897/AJB2017.15948[Article Number: 75D4D9763980]
The objective of the present study was to identify the genetic polymorphism at two loci (5’ regulatory region and exon 10) in follicle-stimulating hormone receptor (FSHR) gene among different breeds of Egyptian goat (Baladi, Parqi, Damascus and Zaraibi goats). The polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) technique proved the presence of three genotypes (AA, BB and AB) in Parqi... Read more.
DOI: 10.5897/AJB2016.15709[Article Number: EE013AD63982]
Polypharmacological activities of the biflavonoid fraction of Garcinia kola seed justify its development as a nutraceutical, however, quality assurance of active nutraceutical ingredient (ANI) requires conformance to appropriate standards of composition and quality. It was hypothesized that variation in extraction protocols, as previously reported for the biflavonoid fraction, would lead to variation in extract... Read more.
Page 1 of 590, showing 20 records out of 11788 total, starting on record 1, ending on 20