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Department of Pharmaceutical Sciences
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Department of Bio & Nano Technology
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    ABSTRACT: Guava juice is known to be rich in antioxidant activity due a high level of vitamins A and C. However, tannins present in the guava juice form tannin-protein complexes that affect the utilization of vitamins and minerals and inhibit digestive enzymes. Beside this, bitterness and cloudiness are the other major problems of juice industries. The present study aimed to utilize a low-cost substrate (tea residue) for the production of tannase and its application in detannification of guava juice. Solid-state fermentation (SSF) was evaluated to produce tannase from Aspergillus niger. Maximum tannase (1.86 U/g dry substrate) production was observed at 30°C after 96 hr of the incubation period. The optimum pH of the moistening agent was found to be 5.0. Partially purified enzyme using ammonium sulfate precipitation was subjected to guava juice treatment at a level of 0.5, 1.0, and 2.0% for 30 and 60 min. Decrease in tannic acid content of guava juice was found to be 17.60, 29.04, and 44.38% after 30 min and 40.59, 53.69, and 59.23% after 60 min, respectively.
    Preparative Biochemistry &amp Biotechnology 04/2014; 44(3):281-90.
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    ABSTRACT: The pesticide formulations in use these days have their own burdens on farming systems in terms of their accumulation in soil and ecosystems which can have serious effects on mankind and living organisms. With the help of nanotechnology, controlled release of agrochemicals, site targeted delivery of various macromolecules desired for improved plant disease resistance, enhanced plant growth and efficient nutrition utilization can be easily done. Nanoencapsulation has an advantage of safer handling and more efficient use of pesticides with less exposure to environment that guarantees ecoprotection. In plant entomology, nanotechnology targets specific agricultural problems in plant pests interaction and provide new ways for crop protection. The present investigation involves the delivery of imidacloprid (admire) pesticide in the form of nanoformulation to plants and investigation of their ultimate effects which can provide some insight for the safe use of this novel technology for the improvement of crop yield and safety.
    Carbohydrate Polymers 01/2014; 101:1061-1067.
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    ABSTRACT: Hydrogen (H2) production was studied using a non-heterocystous, filamentous cyanobacterium, Lyngbya perelegans in free and immobilized forms, where cells were incubated under O2 free anaerobic environment with alternate light and dark period (21 h light/3 h dark). For immobilization, agar and alginate systems were taken and it was revealed that hydrogen production was more sustained in alginate trapped cells as compared to agar trapped cells and free cells. Cell density and size of bound cell system were also important parameters influencing H2 production in immobilized systems. The type of gas mixtures sparged for creating anoxic environment in the headspace had a significant influence on H2 production showing methane (CH4) to be most conducive component of the gaseous mixture.
    Biomass and Bioenergy 01/2014;


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Journal of hazardous materials 05/2009; 169(1-3):1-15.
12/2008: pages 431-456;

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