African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12218

Table of Content: 3 May, 2017; 16(18)

May 2017

Genetics and environmental trends in growth performance of Horro (Zebu) and crosses of Holstein Friesian and Jersey cattle breeds

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...

Author(s): Habtamu Abera

May 2017

Silencing of the rift valley fever virus s-genome segment transcripts using RNA interference in Sf21 insect cells

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...

Author(s): Juliette Rose Ongus, Evans Kiplangat Rono and Fred Alexander Wafula Wamunyokoli

May 2017

Cyclical changes in the histology of the gonads (ovary and testes) of African pike, Hepsetus odoe

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...

Author(s): Idowu, E. O.

May 2017

The African black soap from Elaeis guineensis (Palm kernel oil) and Theobroma cacao (Cocoa) and its transition metal complexes

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...

Author(s): Adebomi A. Ikotun, Oladipupo O. Awosika and Mary A. Oladipo

May 2017

Metabolic engineering of Corynebacterium glutamicum to enhance L-leucine production

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...

Author(s): Huang Qingeng, Liang Ling, Wu Weibin, Wu Songgang and Huang Jianzhong

May 2017

Fourier transform infrared spectroscopic analysis of maize (Zea mays) subjected to progressive drought reveals involvement of lipids, amides and carbohydrates

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,...

Author(s): Chukwuma C. Ogbaga, Matthew A. E. Miller, Habib-ur-Rehman Athar and Giles N. Johnson

May 2017

The nitrogen-fixing Bradyrhizobium elkanii significantly stimulates root development and pullout resistance of Acacia confusa

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...

Author(s): Jung-Tai Lee, Sung-Ming Tsai and Chung-Hung Lin

May 2017

Screening of exopolysaccharide-producing coccal lactic acid bacteria isolated from camel milk and red meat of Algeria

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....

Author(s): Imène Kersani, Halima Zadi-Karam and Nour-Eddine Karam

May 2017

Proximate composition, microbiological safety and heavy metal contaminations of garri sold in Benue, North-Central Nigeria

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...

Author(s): Innocent Okonkwo Ogbonna, Blessing Ifeoma Agbowu and Felix Agbo

May 2017

Efficacy evaluation of spinosad bioinsecticide capsules suspension for the control of Helicoverpa armigera

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...

Author(s): Francinea Souza, Leila T. Maranho and Ligia A. C. Cardoso