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: 2October 2012; 11(79)

October 2013

Genetic analysis of baculovirus resistance in lepidopteran model insect Bombyx mori L.

  In order to clarify the resistant mechanism of BmNPV in silkworm, and from negative to prove agricultural pest inheritance of virus resistance, in this study, we used the highly resistant strain NB and susceptible strain 306 as the material through the method of classical genetics experiment, and proved that the baculovirus resistance in silkworm is controlled by a pair of autosomal dominant major gene. At...

Author(s):   Fan Feng, Jingang Fu, Ping Hu, Xiuwen Zhang, Qin Yao and Keping Chen  

October 2013

The biodiversity and stability of alpine meadow plant communities in relation to altitude gradient in three headwater resource regions

  Kobresia pygmaea meadow community diversities in relation to altitude gradients (4200, 4300, 4400, 4450) on free grazing grassland was studied in the range of Chenduo county, Yushu prefecture, Qinghai province. Species richness and diversity index of vegetations in the four altitudes were comparatively analyzed. The results showed that the shape of species richness responsive curves to altitude gradient...

Author(s):   Yuejun FAN, Xiyun CHANG, Yuhai Yang, Hongxiao SHI and  Xiangyang HOU  

October 2012

Assessment of spatio-temporal variations in surface water quality of Ghaggar River (North-Western, India) utilized for drinking and agricultural purposes

  In the present study, statistical analyses (descriptive and principal component analysis) were applied to Ghaggar River surface water data set monitored in the month of June 2006 and 2007 to check spatio-temporal variations in water quality. From these, two summer observations were taken into consideration because in summer season, high concentrations are observed for different water constituents. The various...

Author(s):   Sukhdev Kundu, G. S. Gill, Naval Kishore, Ram Ratan Singh and Aditya Kumar  

October 2012

Molecular phylogeny of recurrent road killed butterflies in Nilgiri biosphere reserve, India, using CO1 gene marker

  We examined the spatial patterns and factors influencing butterflies aggregations of road-kill at Mudumalai Tiger Reserve, Mukuruthi National Park and Avalanche Forest region in NBR (Nilgiri Biosphere Reserve) Southern India. We surveyed roads varying in high traffic volume, configuration and adjacent landscape attributes for analyzing road-kills between January 2010 and December 2010. The aim of the present...

Author(s):   Chithravel Vadivalagan, Chinnappan Gunasekaran and Ibrahim Salahudeen  

October 2012

Optimization of lipid production in the oleaginous bacterium Rhodococcus erythropolis growing on glycerol as the sole carbon source

  The growth of an oleaginous bacteria strain Rhodococcus erythropolis on glycerol was studied. Lipid accumulation was influenced by the glycerol concentration, nitrogen source, nitrogen concentration, pH medium, incubation time and aeration rate. Under the best optimized flask culture medium; 30 g/L glycerol plus 0.75 g/L urea, incubation temperature at 30°C, agitation rate of 150 rpm...

Author(s):   Salinee Sriwongchai, Prayad Pokethitiyook, Wanvisa Pugkaew, Maleeya Kruatrachue, and Hung Lee  

October 2012

Characterization of the Lactobacillus isolated from different curd samples

  Lactic acid bacteria are commonly found in the fermented dairy products.Lactobacillus is a genus of lactic acid bacteria and described as heterogeneous group of regular, non-spore forming, gram-positive, rod shaped, non-motile bacteria and absence of catalase enzyme. The aim of this study was to isolate Lactobacillus from different curd samples. A total of 14 curd samples were collected from...

Author(s):   Renuka Goyal, Harish Dhingra, Pratima Bajpai and Navneet Joshi  

October 2012

Evaluation of conidia production and mycelial growth in solid culture media from native strains of entomopathogenic fungi isolated from citrus-growing areas of México

  It is important to know the ability of native strains to carry out the process of sporulation and growth in different conditions and to determine their possible potential as biological control of pests of agricultural importance, mainly in citrus areas. The objective of this study was to evaluate five different solid culture media for the determination of the production of conidia and mycelial growth of...

Author(s):   Fátima Lizeth Gandarilla-Pacheco, Katiushka Arévalo-Niño, Luis J. Galán-Wong, Carlos F. Sandoval Coronado and Isela Quintero-Zapata  

October 2012

Influence of spice and wine based marinades on bovine Biceps femoris muscle tenderness

  Fresh beef slices were marinated by immersion in marinades based on dry red wine, lime-tree honey, salt, spices and seasoning plants as thyme (Thymus vulgaris),marjoram (Majorana hortensis), garlic (Allium sativum) and horseradish (Armoracia rusticana). Control samples were prepared without marinating treatment but packed and stored in the same conditions as marinated samples. After marination,...

Author(s):   Daniela ISTRATI, Ana-Maria SIMION CIUCIU, Aurelia IONESCU, CameliaVIZIREANU and Rodica DINICÄ‚  

October 2012

Spices and food condiments in Niger-Delta region of Nigeria

  Spices and food condiments studies here have both local and international values and recognition. Forty seven crop species commonly used as spices and condiments in the rainforest ecosystem of the Niger delta region of Nigeria were evaluated. The study revealed that leafy vegetables are richer in crude protein (CP) than the spices and bulb. However, all these crops are rich in minerals, relatively low in...

Author(s):   Green B. O., Nworgu F. C. and Obazee M. N.  

October 2012

Ultrasound-assisted degradation of a new bacterial exopolysaccharide WL-26 from Sphingomonas sp.

  Ultrasonic degradation of a new exopolysaccharide WL-26 from Sphingomonas sp. was made over the frequency range 200 to 1200 Hz and polymer concentrations of 3, 5, 10 and 20 g/L using high performance anion exchange pulsed-amperometric detection chromatography (HPAEC–PAD) and infrared spectroscopy. Sonication was more efficient with less concentrated polysaccharide solutions, high ultrasonic...

Author(s):   Wei Jia, Li Zhu, Jin-Song Zhang, Xiao-Bei Zhan,, Yan-Yan Bai, Shuai Zhou,  Yan-Fang Liu, Zhi-Yong Zheng, Chi-Chung Lin      

October 2012

Extraction and identification of the hepatoprotective bio-active components of the root of Actinidia deliciosa

  The root of Actinidia deliciosa has been used as traditional drugs in China for a long time. This study therefore aimed at investigating the hepatoprotective bio-active components from the root of A. deliciosa comprehensively and accurately, thus promoting the exploitation and utilization of the whole resource of A. deliciosa. For the purpose of this study, the roots of A....

Author(s):   Xue Bai, Xiaoqin Liu, Yunzhu Zhang, Xiuju Chen and Xinpeng Bai,  

October 2012

Polymerase chain reaction (PCR) detection of mixed trypanosome infection and blood meal origin in field-captured tsetse flies from Zambia

  The prevalence of animal African trypanosomes and source of blood meal in wild field captured tsetse fly was assessed by single polymerase chain reaction using paraflagellar rod protein A (PFRA), protein kinase (KIN) and serum resistance- associated (SRA) primers, respectively for Trypanozoon group species, universal trypanosome species and Trypanosoma brucei rhodesiense. DNA samples (250)...

Author(s):   Mwandiringana E., Gori E., Nyengerai T. and Chidzwondo F.  

October 2012

Detection of quorum sensing molecules from Vibrio harveyi and use of synthetic furanone to control V. harveyi during shrimp larviculture

  This paper explores the extraction and detection processes of quorum sensing molecules such as N-aceyl homoserine lactone compounds (AHL) from marine Vibrio harveyi. The spent culture of V. harveyi was solvent partitioned for AHL, rotary evaporated and re-suspended in 50% acetonitrile then detected with reporter strain using Luminometer. Furanone was tested for antagonism against V....

Author(s):   Kannappan Sudalayandi, Anil Kumar, Uzo Ihemere, Vanessa Falcoa, Narayanan Narayanan, Elisa guerroa and Richard Sayre  

October 2012

Assessment of non-genetic parameters of the racing performances of Arabian and Thoroughbred horses in Algeria

  From 1995 to 2007, flat racing data was collected for Thoroughbred and Arabian horses in Algeria. Non-genetic factors affecting racing performances have been identified and quantified using linear models. Performances are represented through the earnings and the rankings. Three traits were used: two earnings traits [the logarithm of annual virtual earnings (LAEV) and the logarithm of...

Author(s):   S. Tennah, N. Kafidi, N. Antoine-Moussiaux, C. Michaux, P. Leroy and F. Farnir