Hội nghị khoa học lần thứ 20 = Proceedings of the 20th scientific conference Hanoi University of technology. Phân ban. Công nghệ sinh học-thực phẩm = Section. Biological and food technology. Hanoi, 2006

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A study on improving the quality of fresh cow milk after being milked on breeding farms in Vinh Phuc province: The quality of fresh milk after being milked has a direct influence on that of UHT milk. The research has made an in-depth study on breeding practice and effects of regimen, milking and storing methods as well as transportation from breeding households to dairy factories on fresh milk quality; especially the effects of storing temperature and duration in dairy factories on microorganism quality of milk before processed with a view to finding appropriate storing conditions.
Analysis of microbial community structure changes in wastewater polluted by nitrogen compounds
Antihypertensive activity of some potential food samples
Biological characteristics of Trigonopsis variabilis 0864 producing D-amino acid oxidase
Biosynthesis of nisin from Lactococcus lactis subsp. lactis 11
Biosynthesis of ribostamycin and neomycin
Changes in memhrane composition in ethanol- and acid-grown cells of Oenococcus oeni: impact on membrane fluidity
Characteristics of aroma compounds of natsudaidai (Citrus natsudaidai Hayata) essential oil
Charateristics of lactic acid bacteria using in probiotic for preventing and treating the digestive disorder of pigs
Contrôle de la cinétique de refroidissement pour la maitrise de la survie des microorganismes à 0oC
Coupling SSH with reverse Northern dot blot: a rapid and efficient way to isolate differentially expressed genes during salt stress in rice
Detection of aflatoxin-producing molds in corn, peanut and soil by PCR technique
Determination of isotope ratio of monoterpene hydrocarbons in Vietnamese pummelo essential oils
Determination of rutin and quercetin contents in buckwheat materials
Effect of microbial pesticides on yield and quality of cabbage in Dong Bam commune, Dong Hy district, Thai Nguyen province in spring-winter season of 2004
Effects of medium composition on poly-beta-hydroxybutyric acid accumulation in lactic acid bacteria
Effects of modification methods on physico-chemical properties of wheat starch
Effets of some stimulants on the growth and production of cephalosporin C by Acremonium chrysogenum AC880: In this paper, the effects of some stimulants on the growth and cephalosporin C production by A. chrysogenum AC 880 have been studied. Among six compounds tested, DL-methionine gave the best results in enhancing the biomass and cephalosporin C production. Further studies with DL-methionine showed that addition of this compound at the final concentration of 0,0268 Mat 24 hours after inoculation resulted in the highest dry biomass of 20.9 mg/ml at 72 hours run time, and the antibiotic activity peaked at 120 hours.
Escherichia coli - the effect of cold shock and temperature on the sensibility to nisin of Escherichia coli
Evaluation of bacterial contamination at different stages of ultra high temperature (UHT) milk processing
Generation of scFv antibody fragment specific for pathogenic Listeria monocytogenes by phage display technology
High dietary fiber breads: quality and nutrition
Isolation and selection of Bacillus for polluted lake water treatment: Bacillus has several interesting characteristics, which are suitable for polluted lake water treatment. So it plays a major role in biological products. Among 50 strains, 5 strains, N11, N16, N18, N20 and N21, were selected. They can remove 72-79% of COD in the water after 6 days. Base on biochemical characteristics, N11 belongs Bacillus subtilis; N16, N20 and N21 belong to Bacillus megaterium; and N18 belongs to Bacillus lichenfomis. The strains grow very well at 30oC and reach maximum OD after 21h.
Isolation denitrification bacteria for using in polluted lake water treatment
Kombucha - a fermented beverage from fresh green teas: Kombucha is a well-known fermented beverage from fresh green teas, which grows everywhere in Vietnam. This study aims at using Moc Chau green teas for producing Kombucha and the results showed that Moc Chau green teas and saccharine are suitable for this purpose and the fermentation time in 6 days at 26oC gives higher qualitative and sensory values of final fermented drink.
Optimising the expression of Bacillus endo-beta-1,4-mannanase in Escherichia coli
Particle size determination of fat globules in dairy products by laser light scattering technique
Possibility of using Bacillus subtilis CN2 for polluted lake water treatment: Nowadays, fresh water sources such as lakes, ponds and rivers, in the world as well as in Vietnam are seriously polluted. For polluted lake water, treatment on spot is interested because it can recover ecosystem of the lake and surroundings. In this method, biological products, which contain a mixture of microorganisms, are used and among them Bacillus plays a main role. In this study, Bacillus subtilis CN2 shows some characteristics, which are suitable for treatment of polluted lake water. B. subtilis CN2 produced some proteases, crude enzymes also digest native collagen from rat tail tendon and grows well in a wide range of temperature 30-40oC. When growing in polluted lake water, strain CN2 can remove 80% COD after 6 days.
Producing PL-06 from medical herbs for treating white facee for tiger prawn (Penaeus monodon): Presently, using medical herbs for treating some human diseases have more effectiveness. However for aquaculture, it is relatively new. In this study, the authors are conducting to process and research the antibacterial capacity of some herbal on the Enterobacteriaceae and negative bacteria which were separated from white facee disease Tiger Prawn, since then we keep administrating these herbal that enable antibacterial together some of herbal under appropriate proportion into finished product. This product is applied to treat white facee from Tiger Prawn
Production of active alpha-glucosidase by recombinant and Escherichia coli in shake flask cultures: Cultivation parameters, which influence the production of the enzyme alpha-glucosidase from Saccharomyces cerevisiae in recombinant Escherichia coli has been investigated in shake flask conditions. At temperature optimum for growth, alpha-glucosidase accumulates partially as inclusion bodies. Low temperature of 24°C and low pH of 5 and defined medium increase the specific activity of produced alpha-glucosidase. The low temperature and low pH value, however, decrease the growth of the cells. Therefore the volumetric activity of alpha-glucosidase, which depends on both specific activity and biomass, remained unchanged. Meanwhile low inducer IPTG concentration can increase the volumetric activity of alpha-glucosidase.