African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12487

Table of Content: 25 December 2012; 11(103)

December 2012

Genetic diversity in Anthurium andraeanum cultivars in Mauritius

  Anthurium andraeanum is an important ornamental in the flower industry in Mauritius. Classical phenotype methods of identification, although still very useful, are difficult to use between very closely related Anthurium cultivars. The objectives of this study were to assess the genetic diversity of 12 A. andraeanum cultivars in Mauritius using random amplified polymorphic DNA (RAPD) and...

Author(s): S. Buldewo, M. Pillay and Y. Jaufeerally-Fakim

December 2012

Effects of environmental factors on the population genetic diversity of Chinese bamboo partridge (Bambusicola thoracica)

  Knowledge of factors that affect population demographic and genetic diversity is of importance to understand the evolutionary ecology. The environment plays an important role in the evolutionary process. This study used mtDNA control region sequences and nuclear microsatellites to infer the relationship between population genetic diversity and environmental factors of Chinese bamboo partridge (Bambusicola...

Author(s): Zuhao Huang, Xinjun Liao, Wei Liang and Luzhang Ruan

December 2012

Isolation of potent biosurfactant producing bacteria from oil spilled marine water and marine sediments

  Biosurfactants produced by bacteria are surface-active compounds involved in the degradation of hydrocarbons. They are heterogeneous group of surface active molecules produced by microorganisms, which adhere to cell surface or are excreted extracellularly in the growth medium. These can be divided into low- molecular weight molecules, that lower surface and interfacial tensions efficiently and...

Author(s): Seema Dhail

December 2012

Application of Moringa peregrina seed extract as a natural coagulant for phenol removal from aqueous solutions

  Phenol and its derivatives are toxic pollutants frequently found in surface and tap waters, and in aqueous effluents from various manufacturing processes such as petroleum and petrochemical, coal conversion, synthetic rubber, plastics, paper, oil refineries and phenol-producing industries. In the present study, the ability of Moringa peregrina seed extract to remove phenol from aqueous solutions in...

Author(s): Edris Bazrafshan, Ferdos Kord Mostafapour, Hamed Faridi and Mohammad Ali Zazouli

December 2012

Antimicrobial activity of Androstachys johnsonii Prain

  Extracts of leaf, root, bark and soil leachates of Androstachys johnsonii screened for antibacterial activity had a significant inhibitory effect on most Gram-positive bacteria tested. Gram-negative bacteria were resistant to most extracts. Of the Gram-negative bacteria tested, 1% leaf extract significantly inhibited the growth of all bacteria tested and both 1% root and bark extract inhibited only...

Author(s):   Molotja M. Georginah, Maanda H. Ligavha-Mbelengwa and Ramakrishna B. Bhat

December 2012

Fermentation of pretreated corncob hemicellulose hydrolysate to ethanol by Candida shehatae and Saccharomyces cerevisiae

  To investigate the effect of unknown fermentation inhibitors in corncob hemicellulose acid hydrolysate processed by pretreatment and detoxification on fermentation, corncob hemicellulose acid hydrolysate and artificially prepared hydrolysate were fermented in parallel by Candida shehatae YHFK-2. The results show that fermentability of corncob hemicellulose acid hydrolysate was better than that...

Author(s): Jingping Ge, Tian You, Xiaofeng Yang and Wenxiang Ping

December 2012

Partial purification and biochemical characterization of acid phosphatase from germinated mung bean (Vigna radiata) seeds

    Mung bean (Vigna radiata) is one of the important crops of the North Eastern Region of India. In the present study, acid phosphatase enzyme was isolated and partially purified from germinated local mung bean seeds. The sequential partial purification process was performed using ammonium sulphate precipitation method. The crude enzyme having a specific activity of 0.50 U/mg was purified using 30 to...

Author(s): Th. Surchandra, S. S. Roy, N. Rakesh Singh, M. R. Sahoo and N. Prakash

December 2012

In vitro ethnotherapeutic potential of the acetone extract of the bark of Ziziphus mucronata Willd. subsp. mucronata Willd.: Antimicrobial and toxicity evaluations

  The antimicrobial and the cytotoxicity activities of the crude acetone bark extract ofZiziphus mucronata were determined by agar diffusion, macrobroth dilution assays and brine shrimp lethality assay, respectively, to ascertain its relevance in ethnomedicine. The results show that both Gram negative and Gram positive bacteria tested were equally inhibited. At the highest concentration (10000...

Author(s): O. O. Olajuyigbe and A. J. Afolayan