acid producing bacteria apb bart

... pyrimidine Acid hữu nhƣ acid acetic nhiều acid hữu không bay khác Tween 80 dẫn xuất acid oleic, loại acid hữu quan trọng có ảnh hƣởng đến sinh trƣởng hầu hết loại vi khuẩn lactic Ngoài acid béo ... triển chúng, rau quả, lên men tạo acid lactic acid acetic số loạt acid hữu khác Các acid hữu làm giảm pH dịch, chống lại tƣợng gây thối rau, Mặt khác nhờ có lƣợng acid hữu đƣợc tạo thành làm tăng ... tách acid lactic thiết bị đại giảm hao hụt acid lactic 47 Đối với hiệu suất acid lactic thu đƣợc thấp tác giả thiết bị lên men cánh khuấy làm hạn chế khả tiếp xúc L acidophilus chất nên lƣợng acid...

Ngày tải lên: 05/11/2012, 09:58

... 2010 Isolation of PHA -producing bacteria Bacterial isolation was done by ten-fold dilution of seven-day-old culture of wastewater consortium spread on NA plates Twenty six bacterial isolates of ... potential source of PHA -producing bacteria using waste glycerol as carbon source In order to screen the potential source of PHA-producer from four kinds of microbial sources, bacterial cultivation ... (1996a) Review Bacterial Polyhydroxyalkanoates, Biotechnol and Bioeng., 49, 1-14 Lee S Y (1996b) Plastic bacteria? Progress and prospects for polyhydroxyalkanoate production in bacteria, Trends...

Ngày tải lên: 05/09/2013, 10:15

... “Evolution of acetic acid bacteria during fermentation and storage of wine,” Appl Environ Microbiol., vol 48, 1984, pp.153-156 [2] G S Drydale and G H Fleet, “Acetic acid bacteria in som Australian ... ml distilled water and drops phenol phetalein, the amount of acetic acid in solution was being titrated Bacterial growth: Bacterial growth was quantified by measuring the absorbance of industrial ... were examined according to their acetic acid production by titration assay and their turbidity due to bacterial growth The results showed their acetic acid percentage after mentioned incubation...

Ngày tải lên: 16/09/2012, 23:41

... u hoá ch t ñ t ti n, khó ki m Tài li u tham kh o [1] J B Brian, Wood, The Lactic Acid Bacteria, The Lactic Acid Bacteria in Health and Disease [2] A.F Harper, E.T Kornegay, K.L Bryant, H R Thomas, ... “Comparison of two strains of Lactobacillus acidophilus as dietary adjuncts for young calves”, J Dairy Sci 63 (1980) 964 Study on characteristics of lactic acid bacteria isolated in Hanoi Mai Dam Linh1, ... Vietnam - Out of 50 isolated lactic bacteria strains, 10 active strains were selected which have properties of Lactobacillus.7 - 10 selected strains producing lactic acid strongly (over 2000T), were...

Ngày tải lên: 16/09/2012, 23:41

... thirteen lactic acid bacteria isolates were obtained from seven fermented 742 World Appl Sci J., (5): 741-747, 2008 Table 1: Species and frequency of occurrence of lactic acid bacteria isolated ... 2008 Table 2: Production of exopolysaccharides by lactic acid bacteria isolate Table 2: Continued Exopolysa 42 -ccarides Lactic acid bacteria (Mg lG1) Sources (%) L.fructvorans FW 29.0 "Wara" ... according to the method of Garcia-Garibay and Marshall [19] The lactic acid culture was treated with 17% (w/v) of 80% trichloroacetic acid solution and centrifuged at 16,000-x g at 4°Cfor 30min.The...

Ngày tải lên: 16/09/2012, 23:45

... dynamic ¨ model for the surface growth of lactic acid bacteria on vacuum-packed meats In the current research, the model is adapted to describe bacterial growth in a liquid medium While the original ... lactic acid present in a surface liquid layer with known dimensions, the adapted model describes the concentrations of cells and lactic acid in a liquid medium Microbial growth and lactic acid ... amount of lactic acid in the medium and the buffering capacity of the medium are known The amount of undissociated lactic acid is then further related to the total amount of lactic acid LaHtot and...

Ngày tải lên: 05/05/2014, 08:44

... bacteria Base on their roles, the intestinal bacteria may be divided into two groups: LAB and putrefactive bacteria LAB are evaluated as beneficial bacteria by their product of acids (lactic acid) , ... (2006) Antibacterial activity of lactic acid bacteria against spoilage and pathogenic bacteria isolated from the same meat small-scale facility: Screening and characterization of the antibacterial ... of bile acid on the cell membrane functionality of lactic acid bacteria for oral administration Res Microbiol 157:720–725 doi: 10.1016/j.resmic.2006.04.002 Thongsom M (2004) Lactic acid bacteria...

Ngày tải lên: 07/07/2014, 19:20

... of cholesterol-lowering lactic acid bacteria 393 Table Number of acid- and bile-tolerant lactic acid bacteria isolated from the human intestine for probiotic use Acida Bileb BSHc Streptococcus ... agar plate Bacteria were preprocessed with reagents to extract fatty acid from the bacterial cell-wall and identified with microbial identification system (MIDI, Inc., USA) Isolation of bacteria: ... (Sigma, USA, pH 7.0) All bacteria were inoculated as 30 µl volume and incubated at 37oC for hrs Then, bacteria were spread onto BL agar plates to confirm the survival of bacteria and anaerobically...

Ngày tải lên: 07/08/2014, 18:20

... (B2) Niacin (B3) Pyridoxine (B6) Cobalamine (B12) Ascorbic acid (C) Folic acid 0.32 mg 1.00 mg 0.04 mg Not detected Not detected μg Bacterial count (CFU/100 g) LAB standard laboratory pelleted ... infiltration of inflammatory cells following a direct topical contact [11] In addition, some Lactic Acid Bacteria (LAB) have shown immunomodulatory and anti-inflammatory activities The genus Lactobacillus ... 23 24 25 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 Stiles ME, Holzapfel WH: Lactic acid bacteria of foods and their current taxonomy International Journal of Food Microbiology 1997,...

Ngày tải lên: 11/08/2014, 08:21

... performed at 4°C Page of Bacterial enzyme activity assays for b-glucuronidase and hyaluronic acid degradation were performed according to the method of Lee et al [28] Bacterial culture in mouse ... Bueno L, Theodorou V, Fioramonti J: Improvement of an experimental colitis in rats by lactic acid bacteria producing superoxide dismutase Inflamm Bowel Dis 2006, 12:1044-1052 Kim JS, Jobin C: The ... 22:1511-1519 Lee HS, Han SY, Bae EA, Huh CS, Ahn YT, Lee JH, Kim DH: Lactic acid bacteria inhibit proinflammatory cytokine expression and bacterial glycosaminoglycan degradation activity in dextran sulfate...

Ngày tải lên: 11/08/2014, 08:22

Ngày tải lên: 14/11/2014, 08:05

... stimuli, including lactic acid bacteria (LAB) LAB are a group of related bacteria that produce lactic acid as a result of carbohydrate fermentation Lactobacilli, bifidobacteria, enterococi and ... tree of the 25 strains of bacteria isolated from new born infants 104 Figure 4.3 IL-8 concentrations obtained upon treatment of bacterial cell debris, whole bacterial cell, bacterial crude cell extracts, ... 2005; Bondarenko et al., 2004) Among the “good” bacteria, lactobacilli, bifidobacteria and enterococci are Gram positive They belong to lactic acid bacteria (LAB) which is an important group in...

Ngày tải lên: 13/09/2015, 19:50

... juice fermented by lactic acid bacteria (LAB) Four isolates of lactic acid bacteria from mango were obtained The results of research showed that all 10 strains of lactic acid bacteria were able to ... Count density of lactic acid bacteria: plate counting method Monitor the indicators: Brix, pH, level of lactic acid after fermentation and the density of lactic acid bacteria Analyze the data ... for added value of fruit juice fermented by lactic acid bacteria Objectives: Study on the conditions of mango juice fermentation by lactic acid bacteria 2 MATERIALS AND METHODS 2.1 Materials -...

Ngày tải lên: 06/10/2015, 12:57

... lactic acid bacteria and to study the favorable conditions of lactic acid fermented carrot juice with biological values The content of this study includes: - Isolation of lactic acid bacteria ... DISCUSSION 3.1 Isolation of lactic acid bacteria All pure isolates were classically defined by observing macro and micro morphology As the result, isolates of lactic acid bacteria were isolated from ... lactic acid bacteria by molecular technique 11 3.5 Study on the effect of dilution ratio and sugar content 12 3.6 Studying the effect of inoculums density, temperature and time of lactic acid...

Ngày tải lên: 06/10/2015, 13:04

... organic acids,… Dragon fruit juice is a suitable medium for lactic acid bacteria to produce new probiotic products Therefore, the study “Fermentation of dragon fruit juice by lactic acid bacteria ... of isolated bacteria strains: - Bacteria strains isolated from Antibio and Probio powder were rod-shaped bacteria They had the same characteristics of Lactobacillus acidophilus, the bacteria in ... 4.31 At this pH, lactic acid bacteria could remain The pH decreased because due to the production of lactic acid during development of bacteria Concentration of lactic acid produced from A strain...

Ngày tải lên: 06/10/2015, 13:04

... at genus level 3.2 Acidity tolerant ability of lactic acid bacterium isolates 12 3.3 Application in producing of fermented pineapple juice by lactic acid bacteria 14 3.4 Dilution ... for lactic acid bacteria to produce new probiotic products Therefore, the research “Fermentation of pineapple juice by lactic acid bacteria was carried out Objectives To isolate lactic acid bacterium ... characteristics, four isolated bacteria were lactic acid bacteria with following characteristics such as: gram-positive bacteria, catalase-negative, reducing lactic acid to dissolution of CaCO3,...

Ngày tải lên: 06/10/2015, 13:05

Ngày tải lên: 04/10/2012, 10:02

... lược tính chất vật lý , tính chất hóa học trạng thái tồn tư nhiên Amoniac, Acid Nitric, Phân đạm •Một số ứng dụng Amoniac, Acid Nitric Phân đạm vào đời sống •Quy trình sản xuất điều chế phòng thí ... 3H2O= CaCO3 + 2NH3 -Ngày nay: dùng phương pháp Haber Process Fe, 400-5000C N2 + 3H2 200 atm 2NH3 II .Acid nitric Sự tổng hợp axít nitric ghi nhận lần đầu vào khoảng năm 800 TCN nhà giả kim người Ả ... + 2H2O HNO3 đ,n làm thụ động hóa Al, Fe, Cr =>có thể dùng bình Al để đựng HNO3đ  Khi đun nóng acid HNO3 oxi hóa phi kim S, C, P… 4HNO3+ C= CO2+ 4NO2 + 2H2O  HNO3 đặc oxi hoá nhiều hợp chất...

Ngày tải lên: 04/10/2012, 11:48

... nucleic acid Nucleotide gồm có ba thành phần: đường pentose, base nitơ (nitrogen) phosphoric acid (Hình 4.3) 4.1.6 Sự tạo thành nucleic acid Các nucleotide nối với liên kết phosphodiester Acide ... có OH tự Nucleic acid gồm hai loại phân tử có cấu tạo giống DNA (desoxyribonucleic acid) RNA (ribonucleic acid) 4.1.7 Một số nucleotide quan trọng không tham gia cấu tạo nucleic acid - ADP ATP ... chất sử dụng để dịnh lượng nucleic acid xác định độ nucleic acid Khi đun nóng dung dịch nucleic acid nhiệt độ cao, thêm acd kiềm để ion hoá base nó, nucleic acid bị biến tính Phân tử DNA xoắn...

Ngày tải lên: 05/10/2012, 08:24

... CO2 + formate + aspactic acid + H2O → inosinic acid Từ inosinic acid tạo nên GMP AMP - Inozinic acid + aspactic acid + GTP → AMP + fumaric acid GDP + Pv - Inozinic acid + NAD + ATP + NH3 → GMP ... CO2 aspartic acid NH3 N Asparic acid CO2 N Quá trình tổng hợp nucleotide pyrimidine xảy qua giai đoạn sau: CO2 + NH3 + ATP → carbamyl-P Carbamyl-P + Aspactic acid → Orotic acid Orotic acid + Riboso5P ... β.aminoisobutyric acid tiếp tục biến đổi amino acid khác 12.2 Sinh tổng hợp nucleotide purine Gốc purine tạo từ nhiều thành phần khác nhau: CO2, aspartic acid, glycine, formate, glutamine CO2 aspartic acid...

Ngày tải lên: 05/10/2012, 08:36