African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12480

Table of Content: 28 January, 2015; 14(4)

January 2015

Ascorbic acid, β-carotene, total phenolic compound and microbiological quality of organic and conventional citrus and strawberry grown in Egypt

A two year study at Alexandria University compared ascorbic acid, β-carotene, total phenolic compound, nitrite content and microbiological quality of orange and strawberry fruits grown under organic and conventional management techniques to see if producers concerns are valid. Organically grown oranges and strawberries had lower titratable acidity (TA); whereas, there was no significant difference in total soluble...

Author(s): Hoda A. Khalil and Shimaa M. Hassan

January 2015

Influence of the reuse of progesterone implants in a fixed-time artificial insemination protocol on the conception rates of lactating cows during two different seasons

This study aimed to evaluate the influence of reusing progesterone intravaginal implants using a fixed-time artificial insemination (FTAI) protocol on the conception rates of 593 primiparous and multiparous lactating cows during two different seasons. The cows were divided into two categories: multiparous and primiparous. The experiment was conducted during seasons with high and mild temperatures. To...

Author(s): Thaisa Campos Marques, Karen Martins Leão, Natalia do Carmo Silva, Moraima Castro Rodrigues, Rossane Pereira da Silva and Patricia Antonio

January 2015

Genetic diversity of Bambara groundnut (Vigna subterranea (L.) verdc.) landraces in Kenya using microsatellite markers

The existence of genetic diversity in germplasm collections is crucial for cultivar development. Genetic relationships among 105 Bambara groundnuts (Vigna subterranea (L) Verdc.) accessions from Kenya were evaluated using 12 microsatellite markers. The Bambara landraces were collected from farmers in the western region and the National Genebank of Kenya. A total number of 24 alleles were revealed with a mean of 2...

Author(s): Forrester O. Odongo, Maurice E.Oyoo, Victor Wasike, James O. Owuoche, Laura Karanja and Paul Korir

January 2015

Activity of Cinnamomum zeylanicum essential oil and ethanolic extract against extended-spectrum β-lactamase-producing bacteria

The antibacterial effects of Cinnamon (Cinnamomum zeylanicum) essential oil and ethanolic extract against extended-spectrum β-lactamase (ESBL)-producing Escherichia coli and Pseudomonas aeruginosa strains were studied in the present study. The essential oil and ethanolic fraction of C. zeylanicum showed significant activities against all tested microorganisms and minimal...

Author(s): Hend Abdulhmeed Hamedo

January 2015

Paclobutrazol biodegradation in unsaturated soil in the Semi-Arid Northeast of Brazil

Paclobutrazol (PBZ) is a plant growth regulator, increasing flowe ring and yield that is widely used in mango cultivation in the semi-arid northeastern Brazil. PBZ remains active in the soil for several years. However, it can severely affect the growth and development of subsequent crops, mainly by reducing vegetative vigor. The aim of this study was to investigate PBZ biodegradation in four samples of soil: P-G (with...

Author(s): Fernanda L. Vaz, Thaís A. Gomes, Caio C. A. Rocha, Maria Aparecida Mouco and Ester R. Gouveia

January 2015

Polymorphism of Pfatpase6 in Côte d’Ivoire: Detection of a four new point mutations

Over the past decade, the number of malaria cases has dropped by more than half in many malaria-endemic countries. However, recent parasite resistance to artemisinin undermines that progress. Artemisinin-based combination therapy (ACTs) is recommended for the treatment of Plasmodium falciparum malaria. Among the potential genes that are associated to resistance of P. falciparum to artemisinin include PfATPase6 gene that...

Author(s): Brice Kouakou Bla, Jonhson Noël David Trébissou, Houphouet Félix Yapi, William Yavo, Francis Adou Yapo and Joseph Allico Djaman,

January 2015

Amylolytic strains of Lactobacillus plantarum isolated from barley

Two α-amylase-producing strains of Lactobacillus plantarum were isolated from South African barley. The extracellular α-amylase activity produced by strain A.S1.2 coincided with cell growth, while strain B.S1.6 produced α-amylase mainly during stationary growth. Cell wall α-amylases in both strains were approximately five times higher than recorded for extracellular α-amylases. Both strains...

Author(s): Hattingh, M. , Alexander, A., Meijering, I., Van Reenen, C. A. and Dicks, L. M. T.

January 2015

Effects of drying temperature on viability of macaw palm (Acrocomia aculeata) zygotic embryos

In response to a growing interest in improving seedling production of oilseed species (like macaw palm), a fruit drying protocol for facilitating seed extraction was proposed. This enabled the production of macaw palm seedlings, but the temperature most suitable for seed extraction without losing its physiological quality is unknown. The goal of this study was to evaluate the effects of different drying temperatures on...

Author(s): Aurélio Rubio Neto, Fabiano Guimarães Silva, Juliana de Fátima Sales, Larissa Leandro Pires, Bethânia Silva Morais de Freitas and Apolyana Lorrayne Souza

January 2015

Biodegradation of low density polyethylene (LDPE) by a new biosurfactant-producing thermophilic Streptomyces coelicoflavus NBRC 15399T

In the present study, we tested 83 actinomycete isolates for low density polyethylene (LDPE) degradation in the laboratory, and these isolates were previously isolated for biosurfactant production from the oil contaminated soil sample near Naval Dockyard in Visakhapatnam. Among them, 20 were positive using 2,3,5-triphenyl tetrazolium chloride (TTC) as a viability indicator and able to grow in a mineral salts medium...

Author(s): Midhun Kumar Duddu, Kalyani Lakshmi Tripura, Girijasankar Guntuku and Dandu Sree Divya

January 2015

Genomic composition factors affect codon usage in porcine genome

The objective of the study was to determine the codon usage bias in the porcine genome and decipher its determinants. To investigate the underlying mechanisms of codon bias, the coding sequence (CDS) from the swine reference sequence (ssc10.2) was extracted using Biomart. An in house built Perl script was used to derive various genomic traits and codon indices. Analysis was done using R statistical package, and...

Author(s): Khobondo, J. O., Okeno, T. O., and Kahi, A. K.

January 2015

Sodicity tolerant polyembryonic mango root stock plants: A putative role of endophytic bacteria

The importance of extracellular enzyme producing endophytic bacteria and their ability to elicit ‘induced systemic tolerance’ against abiotic stress (sodic soil) has been documented. However, the performance of these microbes under various abiotic stresses, especially saline-sodic conditions is less understood and formed the focus of this investigation. The diversity of endophytic bacteria associated with...

Author(s): Kannan, R., Damodaran, T. and Umamaheswari, S.