May 2015
A review on marine based nanoparticles and their potential applications
The increasing demands on nanoparticles have wide pertinent in almost all the fields. Marine ecosystem has variety of living resources, which includes prokaryotes like microorganism to eukaryotic organism like higher plants and animals. The present review dealt with the application of marine organisms in nanotechnology. Our discussion mainly focused on what the marine organisms are involved in and what type of...
May 2015
The use of multiplexed simple sequence repeat (SSR) markers for analysis of genetic diversity in African rice genotypes
Rice is an emerging food and cash crop in Eastern Africa. Thousands of germplasm accessions have been introduced from major rice breeding centers, such as the International Rice Research Institute (IRRI), and Africa Rice but the genetic variability among the introduced rice germplasm is unknown. Knowledge on genetic diversity would be useful in designing measures for comprehensive breeding and conservation. To address...
May 2015
Molecular diversity study of black cumin (Nigella sativa L.) from Ethiopia as revealed by inter simple sequence repeat (ISSR) markers
Nigella sativa L. (commonly known as black cumin) belonging to family Rannunculaceae is an important medicinal plant with worldwide distribution. In Ethiopia, N. sativa occurs in all regions and agro-ecologies at different altitudinal ranges. This plant has a lot of importance in Ethiopia. However, there is no information available on molecular genetic diversity of this crop in respect to Ethiopia. Therefore, the aim of...
May 2015
Inter simple sequence repeat (ISSR) analysis of Ethiopian white lupine (Lupinus albus L.)
White lupine (Lupinus albus L.) collected from two zones (West Gojjam and Awi) of Amhara region and one zone (Metekel) of Benishangul - Gumuz regional state of Ethiopia were studied using inter simple sequence repeat (ISSR) markers in an attempt to assess the genetic diversity. Four ISSR primers of which three were dinucleotide repeats and one, a penta nucleotide repeat amplified a total of 39 clear and reproducible...
May 2015
Genotype x environment interaction and stability analysis for yield and yield related traits of Kabuli-type Chickpea (Cicer arietinum L.) in Ethiopia
Chickpea is the major pulse crop cultivated in Ethiopia. However, its production is constrained due to genotype instability and environmental variability. This research was carried out to examine the magnitude of environmental effect on yield of chickpea genotypes and to investigate the stability and adaptability of genotypes under different agro-ecologies. Seventeen (17) genotypes were evaluated in randomized complete...
May 2015
Effects of the humic acid extracted from vermicompost on the germination and initial growth of Brachiaria brizantha cv. MG5
The biological effects of humic substances on vegetables depend on the source of extraction and the concentration used, on the vegetable species and on the age of the plant. This study aimed to evaluate the effect of different humic acid (HA) doses extracted from vermicompost on the germination and initial growth of Brachiaria brizantha cv. MG5. To that end, germination tests were conducted in germination agents, as...
May 2015
Effect of alkaline treatment on the sulfate content and quality of semi-refined carrageenan prepared from seaweed Kappaphycus alvarezii Doty (Doty) farmed in Indian waters
Seaweed Kappaphycus alvarezii previously known as Eucheuma cottonii is one of the best sources of kappa carrageenan and is cultivated in Philippines, Indonesia, Malaysia and other countries including India. In the present study, semi-refined carrageenan (SRC) was prepared from K. alvarezii with different concentrations of KOH (6, 12, 18 and 24%) at 80 ± 2°C for 2 h; its sulfate contents were...
May 2015
Modification of chitin as substrates for chitinase
Enzymes are able to bind to their substrates specifically at the active site. The proximity and orientation of the substrates strongly increase the likelihood that productive E–S complexes will arise. Treated chitin (powder or flake) is more efficient than crystalline chitin. This is because the latter is less active due to its insolubility. The structure of treated chitin is opened; this facilitates its...
May 2015
Isolation of microalgae species from arid environments and evaluation of their potentials for biodiesel production
Twenty-five (25) strains of microalgae were isolated and screened for growth, lipid accumulation and biodiesel production from arid environments of North East Nigeria. Isolates that produced biomass concentration (≥ 1.50 g L-1 cell dry weight), accumulated high concentrations of lipids (≥ 18% of the cell biomass) and could be purified on agar plates were selected for further studies. Four strains morphologically...
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