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1.
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Higher Production Of Algnate By A Mutant Of Azotobacter Vinelandii By Fermentation

by Saria Rahim | Ms. Shagufta Saeed | Dr. Muhammad | Ms. Huma Mujahid.

Material type: book Book; Format: print ; Literary form: not fiction Publisher: 2012Dissertation note: Abstract Availability: Items available for loan: UVAS Library [Call number: 1521,T] (1).

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2.
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Bioconversion Of Whey To Beta-Galactosidase By Aspergillus Niger

by Muhammad Tayyab Younas | Ms. Huma Mujahid | Dr. Abu Saeed Hashmi | Ms. Sehrish.

Material type: book Book; Format: print ; Literary form: not fiction Publisher: 2013Dissertation note: Beta-galactosidase (lactase) has catalytic property to hydrolyze lactose into glucose and galactose. It is extensively used for the synthesis of milk made products through fermentation. Food rich in lactose have variety of application in industrial and environmental processes. In present study production, purification andcharacterization of ?-galactosidase synthesized by Aspergillus niger has been considered as a great challenge. Beta-glactosidase is an important enzyme involved in conversion of lactose into glucose and galactose and produced on industrial scale for its large applications in the field of health, and food. The production of beta-galactosidase was carried out from fungal culture of Aspergillus niger using whey as a substrate. Optimization of different physical parameters such as temperature, pH, addition of corn steep liquor and production, purification and characterization of beta galactosidase enzyme from Aspergillus niger were studied. Optimum concentration of whey (4mL) were found 13.42 IU/mL and activity of beta galactosidase was found maximum at 72 h of incubation period and further incubation period decline the activity.Optimum pH (13.50 IU/mL)and temperature (17.67 IU/mL) were found 5.5 and 40°C respectively. Addition of corn steep liquor was enhanced the activity of beta galactosidase. Maximum activity was found with 0.6% of corn steep liquor which was 19.4IU/mLas compare to the other nitrogen sources. Finally, addition of ammonium sulphate ?-galactosidase was purified. ?-galactosidase was characterized considering ortho-Nitrophenyl-?-galactoside (ONPG) and whey as a substrate The purified beta-galactosidase was confirmed by SDS PAGE analysis which has molecular weight of 74kDa. The study could also establish that whey could effectively be utilized for ?- galactosidase production thus alleviating water pollution problems caused due to its disposal into the water streams. Availability: Items available for loan: UVAS Library [Call number: 1387,T] (1).

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3.
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Evaluation Of The Detoxification Potential Of Lactic Acid Bacteria From Curd And Whey Against Ochratoxin A In Broiler

by Afshan shabbir | Ms Huma Mujahid | Dr. Asif Nadeem | Dr. Muhammad Tayyab.

Material type: book Book; Format: print ; Literary form: drama Publisher: 2013Dissertation note: Abstract Availability: Items available for loan: UVAS Library [Call number: 1657,T] (1).

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4.
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Bioconversion Of Agricultural Wastes To Polyhydroxybutyrate By Azotobacter Vinelandii

by Tehmina Aslam | Ms. Shagufta Saeed | Dr. Aftab | Ms. Huma Mujahid.

Material type: book Book; Format: print ; Literary form: drama Publisher: 2014Dissertation note: Background Polyhydroxybutyrate (PHB) is a biopolymer. It can be used as a biodegradable thermoplastic material for waste management strategies. It can be produced by various microorganisms. A bacterium, Azotobacter vinelandii accumulates PHB as intracellular granules inside their cells in response to physiological stress such as excess of carbon sources and limitation of nutrients e.g. nitrogen and phosphorus etc. During this research work PHB was produced from agricultural wastes like wheat bran and rice polishing through fermentation and by the optimization of different parameters like water substrate ratio, incubation time, volume of inoculum, pH and nitrogen concentration. Methodology A parent strain of Azotobacter vinelandii was maintained on Jerman agar plate. Fermentation media containing wheat bran and rice polishing as substrates was used to check the production of PHB for the selected bacteria. 0.5 ml of inoculum media was added into sterilized fermentation media and incubated for 24-72 hours. After that, culture media was centrifuged. Further extraction, determination and identification of PHB were carried out by using the pellet. It was found that Azotobacter vinelandii gave maximum PHB yield (192mg/100mL) at 4% of wheat bran after 48 hours of incubation and at 5% of rice polishing after 36 hours (158mg/100mL). Wheat bran gave maximum PHB production (236mg/100mL) at 1.0mL volume of inoculum and rice polishing gave maximum yield (216mg/100mL) at 2.5mL. For wheat bran optimum pH was observed to be 7 to give higher PHB yield (256mg/100mL) and for rice polishing at pH 8.0 maximum PHB was observed (236mg/100mL). From wheat bran maximum quantity of PHB was produced at 0.2% of peptone (268mg/100mL) and at 0.3% of yeast extract (256mg/100mL) while in rice polishing based media higher PHB yield was studied at 0.25% of peptone (258mg/100mL) and at 0.2% of yeast extract (250mg/100mL). In this study Azotobacter vinelandii produced higher yield of PHB using wheat bran as compared to rice polishing. Outcomes So it is concluded that PHB produced in this work can be used in various industries like pharmaceutics, food industry and also in medical fields. It will also be helpful to reduce the pollution caused by other synthetic plastics. Availability: Items available for loan: UVAS Library [Call number: 1818,T] (1).

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5.
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Effect Of Medicinal Plant Extracts On Genes Expression In Human Cervical Carcinoma

by Atika saeed | Dr. Muhammad Tayyab | DR | Ms. Huma mujahid.

Material type: book Book; Format: print ; Literary form: not fiction Publisher: 2014Dissertation note: Abstract Availability: Items available for loan: UVAS Library [Call number: 1999,T] (1).

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