African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12485

Table of Content: 27 April, 2016; 15(17)

April 2016

Production, optimization and characterization of extracellular amylase from halophilic Bacillus lichineformis AH214

Twenty one moderately halophilic bacterial strains were isolated from seawater and sediment in Alexandria Eastern Harbour, Egypt. The isolates were screened for the production of four extracellular degradative enzymes. The majority of isolates (57.1%) possessed significant enzyme activities, 43% of them have potentiality to produce amylase enzyme. The most active isolate for the production of amylase enzyme was...

Author(s): Hanan M. Abel-Nabey and Aida M. Farag

April 2016

Cloning, over-expression, and characterization of a new carboxypeptidase A gene of Bacillus pumilus ML413 in Bacillus subtilis 168

Carboxypeptidase A (CPAs) are a well-studied group of zinc-containing exopeptidases that facilitate the breakdown of proteins and peptides during metabolism. Carboxypeptidase A is typically produced in mammalian pancreatic, brain and other tissues. A new gene encoding carboxypeptidase A in the prokaryote Bacillus pumilus was amplified by polymerase chain reaction (PCR), ligated into the shuttle vector pMA5, and cloned...

Author(s): TRAORE Tahirou, Junping zhou, Zhiming Rao, Genchu Huang, Taowei Yang, Xian Zhang and Meijuan Xu

April 2016

Molecular serotype and evolutionary lineage of Listeria monocytogenes isolated from different Nigerian food items

The molecular serotypes and the evolutionary lineage of Listeria monocytogenes isolated from various foods in Nigeria are yet to be documented. Consequently, popular uncooked food items known locally as Okazi Utazi, Onugbu, Ogbono, Garri and Egusi obtained from plants botanically known as Gnetum africanum, Gongronema latifolium, Vernonia amygdalina, Irvingia gabonensis, Manihot esculanta Crantz and Colocynthis...

Author(s): Ogueri Nwaiwu,

April 2016

In vitro production of thiophenes using hairy root cultures of Tagetes erecta (L.)

Marigold (Tagetes spp.) is a source of thiophenes, which are a group of heterocyclic sulfurous compounds possessing strong biocidal activity, thus making Tagetes plants very useful as natural source of agents for controlling pathogens such as nematodes, insects, fungi and bacteria. Hairy root cultures of Tagetes erecta L. were developed using Agrobacterium rhizogenes mediated transformation. The hairy root clones showed...

Author(s): Vijayta Gupta, Karuna Shanker and Laiq ur Rahman

April 2016

Screening for attractants compatible with entomopathogenic fungus Metarhizium anisopliae for use in thrips management

Several thrips attractants were screened for compatibility with Metarhizium anisopliae (Metchnikoff) Sorokin (Hypocreales: Clavicipitaceae) and a subset of these for attraction to Megalurothrips sjostedti Trybom (Thysanoptera: Thripidae). Conidial germination and germ tube length of M. anisopliae were used as indicators of its compatibility with thrips attractant. Conidial germination and germ tube length differed...

Author(s): David Kupesa Mfuti, Sevgan Subramanian, Saliou Niassy, Daisy Salifu, Hannalene du Plessis, Sunday Ekesi and Nguya Kalemba Maniania