Journal of Advanced Biotechnology and Experimental Therapeutics

98-102.

Authors: Md. Arman Sharif, Ziaul Haque, Md. Rafiqul Islam

Soybean and Canola oil are widely consumed cooking oils all over the world. Oils and fats are harmful to health so the experiment was conducted to study the possible histo-toxicological impacts of long term dietary supplementation of Soybean and Canola oil on liver in Swiss albino mice. A total of 30 male Swiss albino mice at 6 weeks old were used in the study and inconstantly prorated into 5 equivalent groups as group A was considered as control, group B1 (25 ml so/kg pellet) and B2 (35 ml so/kg pellet) were supplemented with Soybean oil (so) and group C1 (25 ml co/kg pellet) and C2 (35 ml co/kg pellet) supplemented with Canola oil (co) respectively in addition to pellet for 60 days. After completion of study period samples (blood and liver) were collected from the mice of each group and the biochemical, gross and histopathological study was performed. The biochemical study revealed that ALT and AST values were increased significantly in Soybean and Canola oil supplemented groups comparing that of the control group. Gross study revealed that significantly higher liver weight was found in Soybean and Canola oil supplemented groups of mice than the control group. Histopathological study revealed that congested portal vein and dilated bile duct was found in the liver of Soybean oil supplemented groups of mice. There was a congested portal vein was found in the liver of Canola oil supplemented groups of mice. From the present experiment, it could be concluded that Soybean and Canola oil have histo-toxicological effects on the liver of mice.

114-119.

Authors: Mst Maiful Akter Dina, Sayeda Sultana, Mohammed Shafi Ullah Bhuiyan

Various factors like plant growth regulator combinations, explant type and explant age were examined for establishing a convenient protocol for high frequency plant regeneration of Brassica napus. Cotyledon and hypocotyl explants of B. napus cv. BARI sarisha-8 were cultured on Murashige and Skoog (MS) medium fortified by different strengths of 6-Benzylaminopurine (BA), 2,4-Dichlorophenoxy Acetic Acid (2,4-D) and α-Napthalene Acetic Acid (NAA) to determine the suitable callus induction and shoot regeneration media. MS medium supplemented with 0.5 mg/L NAA and 3.0 mg/L BA was the best combination as regeneration medium because of showing highest frequency for both callus (80% for cotyledon and 53.33% for hypocotyl explants) and shoot initiation (73.33% for cotyledon and 40% for hypocotyl explants). Four days old cotyledon explants showed the highest (73.33%) frequency of shoot regeneration and highest shoot number to each explant (3.13) when 3-7 days old cotyledon cultured. Among the four tested genotypes of B. napus, BARI sarisha-8 showed the highest shoot regeneration frequency (73.33%) with maximum shoot number to each explant (3.13) while the lowest frequency of shoot regeneration was found in BINA sarisha-4 (46.66%) with minimum shoot number per explant (1.66). The ideal rooting medium was MS media comprised with 0.1 mg/L NAA that offered the maximum frequency (100%) of rooting. The regenerated plantlets were shifted to pot soil, acclimatized and grown until maturity in natural conditions. All plants were fertile and morphologically identical with the source plants. This protocol for high frequency regeneration of B. napus could be used for genetic

127-133.

Authors: Roushney Fatima Mukti, Md. Miraj Kobad Chowdhury, Md. Aftab Uddin

Despite the medicinal values and economic importance, honey is also a source of osmophilic fermentative yeasts. So, it can be utilized for the isolation of local fermentative yeast. Here, 1ml honey was inoculated in yeast extract peptone dextrose (YPD) broth containing 4% dextrose. After overnight incubation, the broth was streaked on an YPD agar plate to purify yeast colonies. In this study, total eight strains were isolated from seven physio-chemically defined florally diversified honey samples of Bangladesh. Microscopic morphology, plasmid profile, growth pattern and fermentative capacity of these isolates were determined. Under light microscope, these yeasts had one of three distinct shapes: ovoid, spherical, or cylindrical. The cytoplasm in young, actively reproducing cells occupied most of the interior and looked homogeneous. Two plasmids of around 3kb and 2.1 kb were common in these strains except for one. While compared with Baker’s yeast, these strains showed faster growth. Five of them were attributed to high fermentative potency. Yeast 2 showed the highest fermentative potency yielding 33.48% (v/v) ethanol. We suggest that these strains have potentialities for efficient bioethanol production to meet the increasing demand of biofuel.

140-145.

Authors: Sheikh Rashel Ahmed, Ismat Jahan Romi, Jamil Ahmed, Mahmudul Hasan, Rubel Roy, Mohammad Mehedi Hasan Khan

The aim of this study was to explore phytochemical profiling, antioxidant and antibacterial activity of four medicinal plants including Catharanthus roseus, Aegle marmelos, Moringa oleifera, and Ageratum conyzoids grown in Sylhet district, Bangladesh. In this study, total 11 phytochemicals were screened from methanol extract of four medicinal plants, wherein flavonoid, tannin, sterol, phenol were present in all four medicinal plants. In vitro, antioxidant activity of these medicinal plants extract was investigated by DPPH-radical scavenging assay. The Aegle marmelos exhibited the highest antioxidant activity followed by Moringa oleifera, Ageratum conyzoids, and Catharanthus roseus extract. Methanolic extracts of same medicinal plants were subjected to a test of their antibacterial activities against Staphylococcus aureus, Escherichia coli, Klebsiella sp., Pseudomonas sp .and Salmonella sp. by agar disc diffusion method. The highest antibacterial potential was observed in the extract of Aegle marmelos against Salmonella sp. followed by Catharanthus roseus against Pseudomonas sp .with zone of inhibition of 18.67 mm, 15.0 mm, respectively. This study confirmed the efficacy of some native medicinal plants extract as potential source of phytochemicals, along with natural antioxidant and antimicrobials, which provide new possibilities to employing them against disease causing test organisms.