African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12269

AJB Articles

Banana influences on differential expression of hypersensitive response and pathogenicity gene f (hrpf) in Xanthomonas campestris pv. musacearum

March 2017

Banana Xanthomonas wilt is a devastating disease of cultivated banana in East and Central Africa, manifesting as initial leaf wilting, premature fruit ripening and eventual death of all infected plants leading to total yield loss. In order to contribute towards development of effective disease control options, hrpf expression by Xanthomonas campestris pv musacearum (Xcm) during establishment of Xanthomonas wilt...

Author(s): Mudonyi, B., Tusiime, G., Kubiriba, J., Tushemereirwe, W. K. and Changa, C. M.

Production and characterization of bacterial cellulose before and after enzymatic hydrolysis

March 2017

Bacterial cellulose (BC) is produced by bacteria such as Gluconacetobacter xylinus. It has unique structural and mechanical properties and is highly pure as compared to plant cellulose. In this study, BC was produced in Hestrin-Schramm (HS) medium. G. xylinus produced an average dry yield of 1.4 ± 0.09 g/L BC after 9 days of fermentation period. Scanning Electron Microscopy (SEM) analysis confirmed BC to be...

Author(s): Richard Auta, Grazyna Adamus, Michal Kwiecien, Iza Radecka and Paul Hooley

Molecular characterization of Chenopodium quinoa Willd. using inter-simple sequence repeat (ISSR) markers

March 2017

Quinua (Chenopodium quinoa Willdenow) is a pseudocereal of Amaranthace family which originated from the Andes of South America. Quinoa is an interesting plant whose capacity to tolerate adverse environmental factors and exceptional nutritional qualities warrant further research in all fields of plant biology, agronomy, ecology and biotechnology. Presently, it is an underutilized crop, which has the potential become a...

Author(s): Morillo Coronado Ana-Cruz, Manjarres Elsa Helena and Morillo Coronado Yacenia

Micropropagation of Peach, Prunus persica (L.) BATSCH. cv. Garnem

March 2017

The present study aimed to develop micropropagation procedure for Prunus persica cv. Garnem. Shoot induction and multiplication was found from nodal explants cultured on MS medium fortified with different concentrations of two cytokinins (6-benzyladeninepourine and Kinetin) alone and in combination with 0.5 mg/l gibberellic acid and 0.01 mg/l indole-3-butyric acid. Microplantlets were cultured to root on ½...

Author(s): Wegayehu Felek, Firew Mekibib and Belayneh Admassu

Comparative study of native microorganisms isolated from watermelon (Citrullus lanatus) waste and commercial microorganism (Clostridium thermocellum) used for bioethanol production

March 2017

This study was to examine the efficiency of native microorganisms, in relation to the commercial bacterium Clostridium thermocellum ATCC 27405 for bioethanol production from waste watermelon on a pilot scale. The raw material was subjected to a grinding process for the later stage of hydrolysis under different temperatures using Aspergillus fumigatus and Leuconostoc dextranicum native microorganisms. This was followed...

Author(s): Rueda O. Darwin, Angulo Alexandra, Mafla Elena, Bangeppagari Manjunatha, Rueda B. Bryan, Gangireddygari V. Subbareddy, Naga Raju Maddela and Bugude Rajeswari

Effect of the essential oils of Thymus vulgaris, Cinnamomum zeylanicum and Mentha piperita on fungal growth and morphology

March 2017

This study aimed to evaluate the antifungal activity of essential oils of Thymus vulgaris L., Cinnamomum zeylanicum B. and Mentha piperita L. on some saprophytic fungi. Essential oils were extracted by hydro-distillation, and chemical composition was analysed by gas chromatography coupled with mass spectrometry (GC-MS). T. vulgaris had as major components, Thymol (35.12%), p-cymene (25.36%) and γ–terpinene...

Author(s): Wilson Agwanande Ambindei, Pierre Michel Dongmo Jazet, Leopold Ngoune Tatsadjieu, Priya P, Manilal VB, Krishnakumar B and Paul Henri Amvam Zollo

Silver nanoparticles biosynthesized by secondary metabolites from Moringa oleifera stem and their antimicrobial properties

March 2017

Biological extracts have recently shown a great potential for rapid biosynthesis of silver nanoparticles (AgNPs) with antibacterial activity. AgNPs were synthetized by reduction effect of secondary metabolites produced by the Nigrospora sp. fungus, from Moringa oleifera stem as a reducing agent and silver nitrate (AgNO3) (1 mM) as salt precursor. The synthesis of nanoparticles (NPs) was monitored through analysis of the...

Author(s): Eric Cristina Arrieta, Benjamín Valdez, Mónica Carrillo, Mario Alberto Curiel, Francisco David Mateos, Rogelio Arturo Ramos, Navor Rosas and José María Bastidas

Biodegradation of monocrotophos by bacteria isolated from soil

March 2017

Bacteria were isolated by enrichment culture technique from groundnut (Arachis hypogaea L.) soils and tested for their ability to degrade monocrotophos in mineral salts medium under aerobic conditions in the laboratory. Based on some of the morphological and 16S rRNA gene sequence analysis, the isolates were identified as Rhodococcus phenolicus strain MCP1 and Rhodococcus ruber strain MCP-2. The initial (0-day) recovery...

Author(s): Srinivasulu M., Nilanjan P. C., Chakravarthi B. V. S. K., Jayabaskaran C., Jaffer M. G., Naga R. M., Manjunatha B., Darwin R. O., Juan O. T. and Rangaswamy V.

An improved protocol for in vitro propagation of the medicinal plant Mimosa pudica L.

March 2017

This work aimed to develop a protocol for the in vitro establishment, multiplication, rooting and ex vitro acclimatization of Mimosa pudica L., a species used in folk medicine and with pharmacological activity. Aseptic cultures were established from seeds inoculated in MS medium, without growth regulators, followed by an in vitro stabilization phase in culture medium supplemented with 2.22 μM BAP. The cultures were...

Author(s): Ricardo Ernesto Bianchetti, Cristiano Ferrara de Resende, Vinícius Sacramento Pacheco, Felipe Floriano Dornellas, Aline Mystica Silva de Oliveira, Jober Condé Evangelista Freitas and Paulo Henrique Pereira Peixoto

Quality characteristics of dried persimmon (Diospyros kaki Thunb) of different fruit sizes

March 2017

Fruits of persimmon are considered as one of the health promoting foods which has been established as one of the major fruits in Korea. Persimmon is one of the fruits processed mainly by drying. Quality characteristics of dried persimmon prepared with different fruit sizes of cultivar Sanggandungsi were investigated. Smaller sized fruits showed significantly high weight loss as compared to bigger ones due to drying. On...

Author(s): Ji Hyeong Cho, In Kyu Song, Doo Hyun Cho, Sanjeev Kumar Dhungana, Hong Ahn and  Il-Doo Kim

Identification of superior soybean lines by assessing genetic parameters and path analysis of grain yield components

February 2017

This study estimated genetic parameters, identified traits of direct and indirect correlation with the grain yield through path analysis and select superior lines, maximizing genetic gain. Two experiments were conducted in 2012/2013 season in randomized blocks with three replications. 23 lines (experiment I) and 44 lines (experiment II) were seeded. For all traits analyzed in both experiments, there was a significant...

Author(s): Bruno Henrique Pedroso Val, Fabiana Mota da Silva, Eduardo Henrique Bizari, Wallace de Sousa Leite, Eder Licieri Groli, Elise de Matos Pereira, Sandra Helena Unêda-Trevisoli and Antonio Orlando Di Mauro

Evaluation of some biological activities of Euglena gracilis biomass produced by a fed-batch culture with some crop fertilizers

February 2017

The feasibility of growing Euglena gracilis in some crop fertilizers was investigated and some biological activities of the produced biomass were evaluated. A fed-batch mixotrophic culture was done in an airlift photobioreactor operated at an aeration rate of 0.2 vvm. A final biomass concentration of 2.6 gL-1 obtained with NPK15:15:15 after 96 h of cultivation was significantly lower than the 5.7 gL-1 obtained with BGII...

Author(s): Eze Chijioke Nwoye, Ogbonna James Chukwuma, Ndu Okechukwu Obisike, Ochiogu Izuchukwu Shedrack and Charles Ogugua Nwuche

Genetic diversity and population structure of traditional sweet cassava accessions from Southern of Minas Gerais State, Brazil, using microsatellite markers

February 2017

Sweet cassava is a food culture of great importance because it is a source of nutrition and energy for millions of people in tropical and sub-tropical regions. For that reason, genetic diversity and population structure studies are necessary in order to obtain more information regarding the evaluated genotypes, reassuring their use in future breeding programs. The objective of this study was to evaluate the genetic...

Author(s): Tiago Maretti Gonçalves, Pedro Soares Vidigal Filho, Maria Celeste Gonçalves Vidigal, Rebecca Caroline Ulbricht Ferreira, Vanesca Priscila Camargo Rocha, Alex Henrique Tiene Ortiz, Leonel Domingos Moiana and Marcus Vinícius Kvitschal

Effect of mineral salts and nitrogen source on yeast (Candida utilis NOY1) biomass production using tubers wastes

February 2017

The deficiency of protein in human food and animal feed is well recognized due to the rapid growth of population. It is therefore, important to increase protein production by utilizing all the available ways and means. In the light of this, an attempt was made in this study by selecting Candida utilis NOY1. This yeast was used to determine the optimum concentration of different minerals salts and nitrogen source on...

Author(s): Nicolas Ouedraogo, Aly Savadogo, Marius K. Somda, François Tapsoba, Cheikna Zongo and Alfred S. Traore

Blood biochemical profile of Sudanese crossbred repeat breeder cows

February 2017

Repeat breeder (RB) is a cow that fails to conceive from three or more successive insemination, but with normal estrus and absence of detectable clinical abnormalities. It is one of the major problems in dairy production. In the present study, the plasma biochemistry of Sudanese crossbred RB cows was examined. Plasma glucose, total cholesterol (TC), triacylglycerol (TG), total protein (TP) and urea nitrogen were...

Author(s): Mohamed Esmail Ahmed, Faisal Omer Ahmed, Ehab A. M. Frah and Imadeldin Elfaki

Hybrids performance of doubled haploid lines derived from 10 tropical bi-parental maize populations evaluated in contrasting environments in Kenya

February 2017

The doubled haploid (DH) technology enables maize breeders to develop a large number of homozygous lines rapidly and test them in hybrid combinations early in the breeding cycle. The objectives of this study were to evaluate testcross performance of 556 DH lines derived from 10 diverse tropical backcross (BC1) populations, and to estimate variance components and broad-sense heritability under both well-watered and...

Author(s): Yoseph Beyene, Stephen Mugo, Sylvester O. Oikeh, Collins Juma, Mike Olsen and B. M. Prasanna

Algae for Africa: Microalgae as a source of food, feed and fuel in Kenya

February 2017

Microalgae are unicellular photosynthetic organisms that inhabit diverse ecological habitats ranging from freshwater and brackish water to seawater and wastewater. They are also especially equipped to thrive in extreme temperatures and pH conditions. Decades of research have highlighted their potential as sources of biofuels, foods, feeds and high-value bio-actives. However, industrial-scale cultivation of microalgae is...

Author(s): Moejes, Fiona Wanjiku, and Moejes, Karin Brenda

Qualitative detection of genetically modified material in crops and food products containing maize and soybean in Algeria

February 2017

The present study was carried out to ascertain the genetic status of soybean and maize crops introduced in Algeria and to test local and imported products containing maize and soybean for the presence of genetically modified organisms (GMO into the food and feed chain). Samples from crops and processed food products were selected, randomly sampled and screened by polymerase chain reaction (PCR) for the presence of the...

Author(s): Louanchi M , Belalia N, Lehad A, Laala S and Salhi L. N.

Uses and technological prospects for the mangaba, a native fruit of Brazil

February 2017

Mangaba (Hancornia speciosa Gomes - Apocynaceae) is a native fruit of Brazil which is of great importance in its areas of occurrence. This species has been subjected to habitat fragmentation that is mainly due to human activity, and requires conservation. The aim of the present review was to evaluate the biotechnological advances in the species. This paper deals with recent studies on the genetic diversity and bioactive...

Author(s): Ana Veruska Cruz da Silva, Adrielle Naiana Ribeiro Soares, Ana Silva Ledo, Tatiana Santos Costa, Camila Santos Almeida, Julie Anne Espíndola Amorim, PriscilLa Santana Santos and Marina Ferreira Vitória

Assessment of genetic variations of Nile Tilapia (Oreochromis niloticus L.) in the Volta Lake of Ghana using microsatellite markers

February 2017

A study was conducted to investigate genetic diversity and population structure among populations of Nile tilapia Oreochromis niloticus (Cichlidae) in the Volta Lake of Ghana using microsatellite markers. Four hundred (400) fish specimens were obtained from nine naturally occurring subpopulations and one selectively bred strain, ‘Akosombo strain’. These were characterized using 15 microsatellite loci. Twelve...

Author(s): Mireku, K. K., Kassam, D., Changadeya, W., Attipoe, F. Y. K. and Adinortey, C. A.

The potential of Aspergillus species in transformation of agricultural products for sustainable production of textile and leather industries in Tanzania

February 2017

Manufacturing industries contribute about 8% of the gross domestic products (GDP) whereas leather and textile industries supply 18% employments of manufacturing industries in Tanzania. Manufacturing industries merely depend on agriculture for raw materials and other inputs. However, processing of leather and textiles requires a lot of inputs, many of them supplied from agricultural produce and some are imported from...

Author(s): Never Zekeya, Madundo Mtambo, Suleman Ndaro, Musa Chacha Patrick Ndakidemi and Ernest R. Mbega

Expression stability of reference genes in the skeletal muscles of beef cattle

February 2017

The objectives of this study were to evaluate the relative expression stability of five candidate reference genes in the semimembranosus (SM) and longissimus thoracis (LT) of beef steers, heifers and young bulls. The mRNA levels of Beta-Actin, eukaryotic initiation factor-2B Subunit 2, glyceraldehyde-3-phosphate dehydrogenase, peptidylprolyl isomerase-A and succinate dehydrogenase complex-subunit A were quantified using...

Author(s): Christopher Heinz Hunke Mberema, and Olivier A. E. Sparagano

Influence of Suillus luteus on Fusarium damping-off in pine seedlings

February 2017

The role of the ectomycorrhizal (Myc) fungus Suillus luteus as a biological control agent against damping off caused by Fusarium verticillioides (Fo) and Fusarium oxysporum (Fm) on Scots (Pinus sylvestris L.) and Stone pine (Pinus pinea L.) was studied in a greenhouse experiment. The vegetative mycelium of S. luteus in a vermiculite/peat carrier was added to potting substrate before inoculation with Fo or Fm spores...

Author(s): Estefanía Mateos, Jaime Olaizola, Juan Alberto Pajares, Valentín Pando and Julio Javier Diez

The ameliorative role of cranberry extract and bone marrow cells against chlorambucil cytotoxicity in rat fertility

February 2017

The objective of the current study was to evaluate and compare the effectiveness of cranberry extracts and bone marrow cells against chlorambucil (CHB) effect on rats' fertility. Forty adult male albino rats were divided randomly into eight equal groups as the following; normal control, rats injected orally with 0.2 mg/kg of CHB for 14 days, rats injected orally with 100 mg/kg of cranberry extract (CB) for ten days,...

Author(s): Ebtesam H. O. Nafie, Eman Khater, Mohamed Awwad, Mohamed Zowail and Kholud Hegazy

Tradescantia pallida as a biomonitoring tool to assess the influence of vehicle exhaustion and benzene derivatives

February 2017

Air pollutants affect their quality, making, inappropriate, harmful and damaging to health in general. The air quality can be measured by the use of higher plants as bioindicators in environmental biomonitoring. In this study, we evaluated the increased frequency of micronuclei (MN) in Tradescantia pallida exposed to potentially toxic environments. The vegetables were implanted in five points (4 test and 1 control) for...

Author(s): Ricardo Melo de Carvalho, Jéssica Laís Couto Machado, Rai Pablo Sousa de Aguiar, Ana Maria Oliveira Ferreira da Mata, Reyca Rodrigues e Silva, Jadson Silva Teixeira, Marcus Vinícius Oliveira Barros de Alencar, Muhammad Torequl Islam, and Ana Amélia de Carvalho Melo-Cavalcante,

Phytochemical importance and utilization potential of grape residue from wine production

February 2017

Grapes are placed at a distinct position, both in the economy and at nutritional and phytochemical levels. The number of studies performed aimed at identifying the various bioactive compounds of grapes, how their cellular structures are linked, efficient methods of extraction and its effect on human health are rather relevant. The use of grapes for wine production is a worldwide activity, therefore a great quantity of...

Author(s): Marina Gonçalves Cirqueira, Samantha Serra Costa, Josiane Dantas Viana, Carlos Antônio Borges Cohim Silva, Marcelo Andres Umsza-Guez and Bruna Aparecida Souza Machado

Nanoscale development and its application in multidisciplinary area: An African perspective

February 2017

The need to fulfil and address the United Nations millennium goals in developing countries is essential and recently nanotechnology has proved and shown potential to change and improve many sectors of African industry, from consumer products to health care to transportation, energy and agriculture. In addition to these societal benefits, nanotechnology presents new opportunities to improve how we measure, monitor,...

Author(s): Anza-vhudziki Mboyi, Ilunga Kamika and Maggy N. B. Momba

Plant physiological stimulation by seeds salt priming in maize (Zea mays): Prospect for salt tolerance

February 2017

Nowadays to lessen the influence of salinity on crop performances such as germination, seedling growth and yield, several actions are undertaken; for example the use of different priming methods, antioxidants and plant growth controllers. Seed priming, best fits in this study on maize crop and is controlled by hydration process followed by re-drying that allows pre-germination which enhanced metabolic activities to...

Author(s): Berhane Gebreslassie Gebreegziabher and Chala Adugna Qufa

Use of biosurfactant surfactin produced from cassava wastewater for anaerobic treatment of effluent from a poultry slaughterhouse

February 2017

The use of a biosurfactant surfactin produced by Bacillus subtilis LB5a in cassava growth medium (cassava wastewater) was evaluated to treat anaerobically, the effluent from a poultry slaughterhouse. During the effluent pretreatment, effects of surfactin concentration factors were evaluated, considering the ones which were superior and below its critical micelle concentration (CMC = 28 mg L-1): 6, 13, 27, 31, 48, 73 and...

Author(s): Natássia Jersak Cosmann, Benedito Martins Gomes, Simone Damasceno Gomes, Ana Paula Resende Simiqueli and Glaucia Maria Pastore

Effect of activators and inhibitors on extracellular thermostable alkaline protease isolated from Bacillus subtilis obtained from eastern province of Saudi Arabia

February 2017

Alkaline proteases need some ions to achieve highest activity. These metallic ions help in, enzyme stability and activity through its thermal stability at high degrees. This protects the enzyme from being destroyed by heat. The results show that the ideal condition for enzyme activity was, using Mn2+ ions as the activator with 1112.5 U/ml activity, while MgSO4.7H2O has  lower effectiveness of an enzyme activity...

Author(s): Eida Marshid Al-Khaldi and Amira Hassan Al-Abdalall

Optimization of biomass and glucoamylase production by Candida famata using response surface methodology

February 2017

Glucoamylase is among the most important enzymes in biotechnology. The present study aims to determine better conditions for growth and glucoamylase productivity by Candida famata and to reduce the overall cost of the medium using central composite design (CCD) with one central point and response surface methodology. A three-level central composite design (CCD) factorial design based was employed to obtain optimal...

Author(s): LAGZOULI Mohamed, EL KETTANI Youssfi, AITOUNEJJAR Ali, ELYACHIOUI Mohamed and JADAL Mohamed

Selection of filamentous fungi producing lipases from residual waters of slaughterhouses

February 2017

The exploration and use of lipases produced by microorganisms are in line with societal concerns since they provide clean development options within the standards of environmental sustainability. The objective of this work was therefore to isolate microorganisms with the potential of producing lipases, which could be used in the waste water treatment systems of slaughterhouse units. Waste water samples were collected...

Author(s): Sideney Becker Onofre, Dirceu Abatti, Douglas Refosco, Amarildo Antonio Tessaro, Jean Alisson Becker Onofre and Alessandra Buss Tessaro

Microbial production of carotenoids – A review

January 2017

Carotenoids are natural pigments that can be synthesized by various microorganisms, including bacteria, yeasts, filamentous fungi and microalgae. These pigments comprise around 700 different structures with peculiar colors and biological properties that are beneficial to health. Advantages of biotechnological production of carotenoids include the ability of microorganisms to use low cost substrates, the optimized...

Author(s): Ligia Alves da Costa Cardoso, Karen Yuri Feitosa Kanno and Susan Grace Karp

Relationship analysis between gene expression profiles and rat liver cirrhosis occurrence

January 2017

Liver cirrhosis (LC) is a kind of liver disease which is pathologically characterized by abnormality and necrosis of hepatic cells, proliferation of fibrous tissue, nodular regeneration and pseudolobule formation. To explore the mechanism of LC occurrence at the level of mRNA, Rat Genome 230 2.0 Array was used to detect gene expression profiles of rat fibrotic livers in 3, 6 and 9 weeks after CCl4 treatment in this...

Author(s): Gaiping Wang, Congcong Zhao, Meng Chen, Shasha Chen, Cuifang Chang and Cunshuan Xu

Molecular identification, micronutrient content, antifungal and hemolytic activity of starfish Asterias amurensis collected from Kobe coast, Japan

January 2017

The starfish Asterias amurensis is one of the common species in Japanese coastal area. The species is considered an extremely rich source of biological active compounds, including saponin. Saponins are secondary metabolites and exhibit a wide spectrum of biological activities. The species of starfish caught in Kobe, Hyogo prefecture, Japan, was analyzed for species identification and micronutrient content. The starfish...

Author(s): Farhana Sharmin, Shoichiro Ishizaki and Yuji Nagashima

Genetic diversity among Sawakni, Berberi and Najdi sheep breeds in Saudi Arabia using microsatellites markers

January 2017

The present study was conducted to assess the genetic diversity and population genetic structure of three sheep populations namely; Sawakni (SW), Berberi (BR) and Najdi (NJ), in Saudi Arabia, utilizing 45, 18 and 31 individual blood DNA extractions, respectively. Seventeen microsatellite markers were used to genotype these 94 sheep individuals. There were 195 alleles generated employing the 17 microsatellites loci with...

Author(s): Ahmed Hossam Mahmoud, Ayman swelum, Mohammad Abul Farah, Khalid. Alanazi, Ahmed Rady, Mahmoud Salah, Nabil Amor and Osam Mohammed

Effect of processing methods on the nutritional values and anti-nutritive factors of Adenanthera pavonina L. (Fabaceae) seeds

January 2017

This research aimed at determining the effect of processing on the nutritional and anti-nutritional values of “food tree” [Adenanthera pavonina L. (Fabaceae)] seeds, a highly nutritional and underutilized legume. The seeds were separated into three groups namely, boiled, roasted and raw. Quantitative analysis was carried out to measure their proximate, minerals, vitamins and anti-nutrients compositions....

Author(s): Felix Ifeanyi Nwafor, Sheily Nneka Egonu, Nkechinyere Onyekwere Nweze and Sarah Nnedinso Ohabuenyi

Composting of sugar cane bagasse by Bacillus strains

January 2017

Composting of sugar cane bagasse with Bacillus sp. CMAGI2 and Bacillus subtilis JCM 1465T strains was carried out during five months at horticultural center. Chemical, biochemical and microbial parameters were followed during this process. There was a difference between inoculated composts and non-inoculated compost. These bacterial additives allowed greater biodegradation compared to control compost. The inoculated...

Author(s): NDèye D. Diallo, Malick MBengue, Massaer NGuer, Mouhamed Kâ, Emmanuel Tine and Cheikh T. Mbaye

Kinetic models and parameters estimation study of biomass and ethanol production from inulin by Pichia caribbica (KC977491)

January 2017

The growth kinetics and modeling of ethanol production from inulin by Pichia caribbica (KC977491) were studied in a batch system. Unstructured models were proposed using the logistic equation for growth, the Luedeking-Piret equation for ethanol production and modified Leudeking-Piret model for substrate consumption. Kinetic parameters (X0, μm, m, n, p and q) were determined by nonlinear regression, using...

Author(s): Mounira Kara Ali, Serge Hiligsmann, Nawel Outili Radia Cherfia and Noreddine Kacem Chaouche

Protection of Lactobacillus acidophilus under in vitro gastrointestinal conditions employing binary microcapsules containing inulin

January 2017

In this research, microcapsules based on low acyl gellan (LAG) and sodium alginate (SA) containing inulin were developed in order to assess its protective effect on the viability of Lactobacillus acidophilus under in vitro gastrointestinal conditions.The results showed that microencapsulated cells display significantly (P<0.05) higher resistance to simulated gastrointestinal conditions (SGIC) than free cells....

Author(s): Rafael E. González-Cuello, Fredy Colpas-Castillo and Arnulfo Tarón-Dunoyer

Antibacterial potential components of Bacillus species and antibiotics residues in branded and unbranded honey samples from Nigeria

January 2017

Honey is a sweet viscous liquid produced by honey bee, Apis mellifera from the nectar of plants. Honey is a natural product that has been used from ancient times till now as food and for medicinal purpose. This study was carried out to determine the mode of action of Bacillus species and antibiotics residues in branded and unbranded honey samples from Nigeria. Bacilli spp. count was carried out by initially heating...

Author(s): Obakpororo E. Agbagwa, Swaroopa D. Rani and Prakash M. Halami

Effects of regionally applied heating on the respiration of wild type and transgenic soybean (Glycine max) plants grown under ambient and elevated CO2 environments

January 2017

Nocturnal dark respiration (Rn) in wild type and transgenic soybean plants grown at SoyFACE research facility, Illinois, USA under ambient and elevated CO2 conditions was examined in this study. Transgenic plants were transformed to overexpress a key Calvin cycle enzyme sedoheptulose-1,7-bisphosphatase (SBP) which is thought to improve yield in the field by at least 11%. Heating was applied using infrared heaters...

Author(s): Chukwuma Collins Ogbaga

Protocol optimization for in vitro shoot multiplication of Jackfruit (Artocarpus heterophyllus L.)

January 2017

Jackfruit (Artocarpus heterophyllus L.) is a cross pollinated fruit tree valued mainly for its fruit and timber wood. Although the crop has been introduced to Ethiopia and adapted well to the Jimma area, its potential for production has not been exploited due to the absence of an efficient method for large scale propagation. Micropropagation is a method for production of large number of genetically uniform planting...

Author(s): Jemal Ali, Kassahun Bantte and Tileye Feyissa

Factors affecting reproductive performance of dairy cow in Algeria: Effects of clinical mastitis

January 2017

The objective of the present study was to evaluate the effects of clinical mastitis at the beginning of lactation on reproductive performance of dairy cows in Algeria. Calving to first insemination and calving to conception intervals, number of insemination per conception and conception rate at the first artificial insemination were recorded for 432 cows from 16 dairy herds in Algeria. Cows were examined for clinical...

Author(s): Bouamra M., Ghozlane F. and Ghozlane M. K.

Characterization and optimization of lipase activity produced by Pseudomonas monteilli 2403-KY120354 isolated from ground beef

January 2017

A total of 56 Gram negative bacterial isolates were recovered from twenty ground beef samples and were screened for their potentiality to produce lipase. Forty four bacterial isolates were recorded as positive producers for lipase on tween as carbon source in solid medium. Also, the highly producer isolates were screened for lipase activity in submerged culture using olive oil as carbon and the most active isolate was...

Author(s): Abdel-Hamied M. Rasmey, Akram A. Aboseidah, Salha Gaber and Fatma Mahran

Molecular detection of disease resistance genes to powdery mildew (Blumeria graminis f. sp. tritici) in wheat (Triticum aestivum) cultivars

January 2017

A study was conducted to detect the presence of disease resistance genes to infection of wheat powdery mildew (Blumeria graminis f. sp. tritici) in selected wheat cultivars from China using molecular markers. Genomic DNA of sixty cultivars was extracted and tested for the presence of selected prominent resistance genes to the fungal disease using molecular markers linked to Pm genes. Results showed that 17 cultivars...

Author(s): Vincent Mgoli Mwale, Xiuli Tang and Eric Chilembwe

Extraction and characterisation of gelatin from the skin of striped catfish (Pangasianodon hypophthalmus) and studies on its colour improvement

January 2017

Functional properties of gelatin from skin of striped catfish with and without bleaching for 48 h by 5% H2O2 (w/v)) were studied. Gelatin from skin bleached with 5% H2O2 for 48 h showed the highest yield (16.18 g). Bleaching not only improved the colour of gelatin gel by increasing the L* (lightness)-value and decreasing a*(redness/greenness)-value, but also enhanced the bloom strength and the emulsifying and foaming...

Author(s): Prabjeet Singh, and Soottawat Benjakul

Electrolyte ions and glutathione enzymes as stress markers in Argania spinosa subjected to drought stress and recovery

January 2017

Understanding the mechanisms underlying Argania spinosa responses to drought stress is essential for its regeneration and domestication. Toward that end, an integrative study of tolerance responses to drought stress in four A. spinosa ecotypes (2 contrasting coastal ecotypes (Adm and Rab) and 2 contrasting inland ecotypes (Alz and Lks)) have been conducted. Responses to soil drying and re-watering were measured at...

Author(s): Abdelghani Chakhchar, Mouna Lamaoui, Salama Aissam, Abderrahim Ferradous, Said Wahbi, Abdelhamid EI Mousadik, Saad Ibnsouda-Koraichi, Abdelkarim Filali-Maltouf and Cherkaoui El Modafar

Isolation and characterization of heavy metal tolerant bacteria from Panteka stream, Kaduna, Nigeria and their potential for bioremediation

January 2017

Panteka stream is a flowing stream polluted with wastes from the activities of mechanics. Water samples collected at different points of the stream were analysed in order to determine the level of heavy metal contamination and bacteria diversity with the view to elucidating the bioremediating potentials of the bacteria isolates. Four bacteria, tolerant to heavy metals, were isolated from Panteka stream. These were...

Author(s): Elizabeth Chika Nwagwu, Victoria Moltong Yilwa, Nkechi Eucharia Egbe and Godwin Bryan Onwumere

Generation of bioethanol from common date by-products, “Teggaza and Lebghel” in Southern Algeria

January 2017

Date by-products constitute the principal food for the oasis populations in Middle East and North Africa. Dates contents consist of 70 to 80% of reducing sugars, and do not require an intensive energy and labour for thermophysical pre-treatment. They can serve as a good feedstock for bioethanol generation through fermentation and distillation. Algeria is among the top sixth producers of dates in the world with more than...

Author(s): Ahmed Boulal, Mabrouk Kihal, Cherif Khelifi and Boudjemâa Benali

Page 12 of 246, showing 50 records out of 12269 total, starting on record 551, ending on 600