African Journal of
Biotechnology

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

Table of Content: 11 September 2012; 11(73)

September 2012

An overview of intellectual property rights in relation to agricultural biotechnology

The majority of the population in developing nations depends on agriculture. Agricultural biotechnology involves genetic modification and promises a number of important benefits, such as improving agricultural yields by increasing the resistance of crops to pests and facilitating them to flourish in harsh natural environments, improving the productivity of crops, and reducing pesticide use. Also, concerns have been...

Author(s): Ram Prasad, U. S. Bagde and Ajit Varma

September 2012

What we know about arbuscular mycorhizal fungi and associated soil bacteria

Mycorrhizal fungi are common soil microorganisms and are well known for their symbiotic association with the roots of host plants. The soil is a complex environment harbouring a wide diversity of microorganisms. The interaction between soil bacteria and arbuscular mycorrhizal fungi has been shown in several studies to be both beneficial in terms of mycorrhizal establishment and as well as plant growth promotion. This...

Author(s): Dames JF and Ridsdale CJ

September 2012

Factors affecting wool quality and quantity in sheep

There are varieties of factors which can affect wool (macro and micro elements of wool) in sheep directly or indirectly. Genetic and environmental factors are major factors influencing wool quality and quantity. There are some bacterial, viral, fungal and espically parasitic diseases which also affect the wool. Other factors are exogenous chemicals, hormones, weather and photo period. In the present study, existing...

Author(s): Muhammad Jamshed Khan⊃., Asad Abbas⊃., Mazhar Ayaz⊃., Muhammad Naeem⊃., Muhammad Saleem Akhter⊃ and Majid Hussain Soomro⊃.

September 2012

Allele frequency analysis of Chinese chestnut (Castanea mollissima) populations using fluorescent simple sequence repeats (SSR) analysis

The aim of this study was to establish a method for allele frequency detection in bulk samples. The abundance of polymerase chain reaction (PCR) products in bulk leaf samples was detected using fluorescent labeled Simple sequence repeat (SSR) primers and an Applied biosystems (AB) automatic DNA analyzer. Compared with the conventional SSR technique based on polyacrylamide gel electrophoresis (PAGE) and silver...

Author(s): Cheng-Xiang Ai, Xian-Mei Yu, Guang-Ning Shen, Zhi-Hua Qin, Shou-Le Tian and Lin Xu

September 2012

Construction and analysis of suppression subtractive hybridization library for Leymus secalinus exposed to drought stress

The response of Leymus secalinus under drought stress was studied using the method of suppression subtractive hybridization (SSH). The subtracted complementary deoxyribonucleic acid (cDNA) library containing 539 clones for leaves of L. secalinus exposed to drought stress was screened by dot-blot hybridization. Among these clones, 16 ESTs were identified as drought stress induced genes and...

Author(s): Manye Yang, Mingfeng Jiang, Yingfan Cai, Yuhui Ye and Wang LiHuan

September 2012

Effects of calpastain (CAST) polymorphisms on carcass and meat quality traits in Mongcai pigs

Calpastain (CAST) activity plays a major role in muscle growth and proteolytic changes post-mortem and the CAST gene has been considered as a candidate gene for carcass and pork quality characteristics. The aim of this study was to analyze the association of two polymorphisms namely CAST_HinfI (allele A and B) and CAST_MspI (allele C and D) with carcass and meat quality traits in Mongcai, a Vietnamese indigenous pig...

Author(s): Nguyen Trong Ngu, Nguyen Thiet, Le Trung Kien, Chau Thanh Vu, Nguyen Thi Hong Nhan, Pham Ngoc Du, Nguyen Thi Kim Khang and Tran Nhan Dung

September 2012

Effect of AgNO3 on androgenesis of Brassica oleracea L. anthers cultivated in vitro

The present article is a synthesis study accomplished at Vegetable Research and Development Station Bacau regarding the implication of silver nitrate (AgNO3) in modulating the morphogenetic reaction of white cabbage anthers cultivated in vitro. According to literature, silver nitrate is a strong inhibitor of ethylene action. Embryo formation, shoot generation and rooting of plantlets are key points on...

Author(s): T. O. Cristea, C. Leonte, C. Brezeanu, M. Brezeanu, S. Ambarus, M. Calinand M. Prisecaru

September 2012

Effect of Moringa oleifera leaf aqueous extract on growth and yield of rape and cabbage

The potential effect of Moringa oleifera leaf extract on growth and yield of cabbage (Brassica oleracia L. var. capitata) and rape (Brassica napus L. var. Giant rape) was evaluated. In the greenhouse, five treatments were used: the control, where only water was added (M0), second control where ethanol 80% was added (ME), Moringa leaf extract applied once at two weeks from emergence...

Author(s): Mvumi Culver, Tagwira Fanuel and Chiteka Albert Zvenhamo

September 2012

Ameliorative effect of protein and calcium on fluoride-induced hepatotoxicity in rabbits

To investigate whether protein (Pr) or calcium (Ca) supplementation could ameliorate hepatic damage induced by excessive fluoride (F); thirty-two 30-day-old healthy New Zealand rabbits were randomly divided into four groups (female: male = 1:1). The four groups were maintained on distilled water and fed the following diets for 120 days: (1) a malnutrition control (MC) diet (8.58% Pr, 0.49% Ca); (2) the MC diet plus...

Author(s): Zhanxue Liang, Ruiyan Niu, Jinming Wang, Hongwei Wang, Zilong Sun and Jundong Wang

September 2012

Xanthan gum production by Xanthomonas campestris pv. campestris 8004 using cassava starch as carbon source

Cassava starch is a main renewable bio-resource with low price and mass production in Guangxi, China. It was used as carbon source in growing Xanthomonas campestrispv. campestris 8004 (Xcc 8004) for xanthan gum production in this study. The xanthan gum yield of gelatinized cassava starch was higher than that of raw cassava starch; the maximal reducing sugar and amylase activity reached 14.30 g/L and...

Author(s): Qunliang Li , Wei Yan, Kedi Yang, Yanxuan Wen and Ji-liang Tang

September 2012

Screening of natural extracts for their antibacterial activity against different enteric pathogens isolated from soil, water and rotten fruit samples

Different bacterial strains were isolated from soil, water and rotten fruit samples, and biochemically characterized as Shigella, Pseudomonas, Escherichia coli, Klebsiellaand Proteus. Unhygienic environment (for example, contaminated food, water and air) are the most common habitats of these pathogens. Mostly, all are involved in endemic breakouts causing urinary tract and gastro-intestinal...

Author(s): Shama Nazir and Zakia Latif

September 2012

Biological activities and nutritional value of Tapinanthus bangwensis leaves

The cytotoxic and antioxidant properties of the ethanolic extract and fractions of the leaves of Tapinanthus bangwensis were evaluated. The investigation of their total phenol and flavonoid contents, proximate analysis and their mineral composition were also carried out. In the brine shrimp lethality assay, the ethyl acetate and dichloromethane fractions showed cytotoxic activity with LD50 values of 11.22...

Author(s): Patience Bassey, Abimbola Sowemimo, Olawale Lasore, Luanne Spies and Maryna van de Venter

September 2012

Biomonitoring of particulate matter by magnetic properties of Ulmus carpinifolia leaves

Biomonitoring of the particulate matter (PM) helps us to find out quantity and quality of vegetation in different parts of the city and create sustainable urban landscape. This study explains the results of an air pollution biomonitoring in Isfahan (Iran) with regards to the magnetic properties of tree leaves of Elm (Ulmus carpinifolia). Isothermal remanent magnetization (IRM300 mT) of U....

Author(s): Mohammad Mehdi Sadeghian

September 2012

Antioxidation activity and total phenolic contents of various Toona sinensis extracts

The purpose of this study was to analyze the antioxidation activities and total phenolic contents of Toona sinensis. An extractive method of the antioxidant activities of localT. sinensis leaf extracts and various antioxidation models were analyzed. The effects of various solvent concentrations to extract the T. sinensis leaf on the antioxidation activity were compared. The results showed that...

Author(s): Chih-Ming Chen, Cheng-Yung Lin, Liang-Chuan Lin and Tien-Chun Wan

September 2012

Phenotypic characterization of Ethiopian indigenous goat populations

A survey was conducted to study the morphological characteristics of indigenous goats in representative zones and districts of Amhara Region of Ethiopia as a first step towards characterization and designing of breeding programs. A pre-tested questionnaire was used for recording morphological features, body weights and linear body measurements. Both qualitative and quantitative traits were recorded on 158 goats randomly...

Author(s): Halima Hassen, Michael Baum, Barbara Rischkowsky and Markos Tibbo

September 2012

Evaluation of corn meal on performance, carcass characteristics and nutrient digestibility of male broiler chickens

To study the effect of corn meal (CM) on performance, carcass characteristics and nutrient digestibility of chickens in a completely randomized design experiment with 4 × 2 factorial arrangement and 4 replicates per treatment, 384 Ross male broiler chickens in a 49 days period were evaluated. Treatments were 0 (CM0), 15 (CM15), 30 (CM30), or 45 (CM45) CM to replace corn and 2 levels of commercial NSP-degrading...

Author(s): Hassan Kermanshahi, Khashayar Pournia and Mohammad Pilevar