Thư viện tài liệu, ebook tham khảo dành cho học sinh, sinh viên
Thư viện tài liệu trực tuyến miễn phí dành cho các bạn học sinh, sinh viên
Effects of lysine, methionine, threonine and tryptophan on growth performance and serum antibody titers to Gumboro disease of color - Feathered chickensSerum antiboy titres against Gumboro disease in broiler chickens According to IDEXX laboratories (2010), the antibody titres against Gumboro disease of around 1000-4000 would be sufficient to protect chickens from this disease. As shown in Table 4, the antibody titre against Gumboro disease after the first vaccination was lower than the minim...
6 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 50 | Lượt tải: 0
Experimental application of surgical technique for perineal urethrostomy in male cats3.5. Improvement of surgical techniques The surgical technique was introduced by Wilson & Harrison (1971), we have had 2 improvement in the modified surgical technique, which helped the healing time and the operation time shorter. Improvement of urethra opening location expression: In the first case, the penis was only 1mm away from the bulbou...
7 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 30 | Lượt tải: 0
Efficacy of white rice - Based diets in nursery pigs8. Conclusions Rice, widely grown over the world, is a highly digestible ingredient and has high potential to be a good feed ingredient for animals. Rice can sub stitute for corn in diets for weaned pigs without affecting the pig’s performance. The rice-based diet appears to be better in growth performance and feed efficiency than a barley- ...
12 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 34 | Lượt tải: 0
Entrainer selection for separation of azeotropic mixtures by distillation methodsCONCLUSIONS A critical review of four existing entrainer screening rules has revealed that they contradict each other and that none of them can be used reliably for selecting a feasible entrainer and why there is a necessity to propose the entrainer selection procedure. Throughout the results of this work, the procedure has been proposed and in...
10 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 30 | Lượt tải: 0
Characterization of cytochalasins and steroids from the fruiting bodies of daldinia concentrica in Viet NamCompound 2 was isolated as optically active colorless needles, m.p. 120-121 °C. The HR ESI MS analytical data of 2 revealed the molecular formula as C28H37O4N (m/z 451.2717 [M]+). Its NMR data is similar to 1 except for the presence of a methylene group in replace of an oxygenated methine. The 1H-NMR spectrum of 2 displayed the characteristic re...
6 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 35 | Lượt tải: 0
Effect of rice bran oil on mycelial biomass production, biosynthesis and bioactivities of polysaccharides by ophiocordyceps sinensis fungusThe IC50 values of the polysaccharides exhibiting strong anti-inflammatory activities in vitro was present in Fig. 3. The result exhibited that EPS obtained from culture of O. sinensis with rice bran oil with different concentrations were able to inhibit BSA. In particular, high EPS obtained from culture medium supplemented with 5 % rice oil had...
9 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 46 | Lượt tải: 0
Triterpenoids from selaginella rolandi - Principis and their ptp1b inhibitory activityThe PTP1B inhibitory activity of the isolated compounds (1–4) were evaluated using pNPP as a substrate described previously [12], and the results were showed in Table 1. Ursolic acid was used as a positive control in this assay and displayed an IC50 value of 3.46 0.07 μM and mixed-competitive inhibition mode. Among the isolates, compounds 1 and 2...
5 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 42 | Lượt tải: 0
Antioxidant properties of folic acid: A dft studyFinally, Gibbs free energy and reaction enthalpies of reaction between FA and HOO radical at the C19 H, C9 H position were also calculated (Table 2). We see that reaction enthalpies (ΔH) at C9 H and C19 H positions is equal to -4.11 and -0.44 kcal/mol. Gibbs free energies ( G) at these two positions are -4.14 and -0.17 kcal/mol, respectively. Th...
7 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 41 | Lượt tải: 0
Antioxidant potential of five compounds from the marine fungus aspergillus flocculosus by dft method: Hat and set mechanismThe Table 1 showed that, for compound (1), at position C6 H, the hydrogen atom donating capacity is the highest with the lowest BDE in the gas phase being 83.4 kcal/mol. Similarly, for compounds (2), (3), (4), (5) are sequence at position C12 H, N1 H, N17 H, C3 H with BDE values in turn 80.2, 75.3, 73.2 and 74.8 kcal/mol. Besides, the H-atom don...
6 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 39 | Lượt tải: 0
Research on the composition of lipids, fatty acids, and amino acids from egg and body of sea urchin tripneustes gratillaThe results from Table 4 illustrated that 17 amino acids were found in the egg and body samples of sea urchin T. gratilla, made by HPLC method. This result is similar to previous researches on other species of sea urchin. It was special that there was no essential amino acid which had high content in the egg sample. In contrast, from body sample...
9 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 38 | Lượt tải: 0
