Tổng hợp tài liệu, ebook Sinh Học tham khảo.
Tổng hợp 6 dẫn xuất 5-arylidene-3- methylrhodanine dựa trên phản ứng ngưng tụ aldol chéo của aldehyde thơm và 3- methylrhodanine, sử dụng 1-butyl-3- methylimidazolium chloride ([BMI]Cl) làm xúc tác chuyển pha trong dung môi nước. Phản ứng được thực hiện dưới sự chiếu xạ vi sóng (160 watts) trong thời gian 10 phút cho hiệu suất 5983 %. Lần ...
6 trang | Chia sẻ: yendt2356 | Ngày: 01/12/2020 | Lượt xem: 426 | Lượt tải: 0
Rearing density is one of the important factors having strong effects on growth rate, survival rate and rearing efficiency of many fish species in general and Siberian sturgeon in particular. In this study, three densities were experimented in order to identify the most suitable density for rearing Siberian sturgeon from the stages of fry to fin...
6 trang | Chia sẻ: thucuc2301 | Ngày: 01/12/2020 | Lượt xem: 526 | Lượt tải: 0
In this article, we studied the effect of cystein in maturation culture on glutathione concentration in oocyte and on embryos development by in vitro fertilization in porcine. 0.6 mM cysteine supplementation on TCM-199 medium has increased the amount of GSH in the oocyte. The GSH level began to increase at the 40th hour after cystein supple ...
8 trang | Chia sẻ: yendt2356 | Ngày: 01/12/2020 | Lượt xem: 416 | Lượt tải: 0
Based on analysis results of 12 water samples on the Sai Gon River showed that Pb2+ concentrations ranged from 0.0017 to 0.0107 ppm. It is within the permitted limit of QCVN 08 BTNMT. The soluble level of ion Pb2+ in the samples changed from 0.006 to 0.0062 ppm. The range is suitable for hyacinth to absorb Pb2+ easily in the aquatic environment....
8 trang | Chia sẻ: yendt2356 | Ngày: 01/12/2020 | Lượt xem: 529 | Lượt tải: 0
The experiment was divided into six blocks in response to three levels of Ca, P from 100 – 90 – 80 % (NCR Recommendation, 1994) with and without Phytase 5000 supplementation at a dose of 1 gram per kg of feed. The results showed that, the three levels of Ca, P applied in the experiment with Phytase supplementation in diets for broiler chickens ...
7 trang | Chia sẻ: thucuc2301 | Ngày: 01/12/2020 | Lượt xem: 506 | Lượt tải: 0
The plant could offer a source of natural compounds for drug discovery of infectious diseases. This research aimes to evaluate the aqueous Averrhoa carambola L extracts which against antibiotic resistant bacteria by the diffusion method and microdilution method. There are twenty one species is screened but there are eleven species which against ...
5 trang | Chia sẻ: yendt2356 | Ngày: 01/12/2020 | Lượt xem: 463 | Lượt tải: 0
− Việc bổ sung enzyme protease vào dịch tự phân trùn quế với hoạt độ 2.5 UI/ 100 ml dịch trùn, ở nhiệt độ 35oC trong thời gian 8 giờ giúp gia tăng hiệu suất thu nhận đạm hòa tan và tiết kiệm lượng enzyme. Quá trình có thể được tiến hành trong điều kiện thủy phân tĩnh. Hiệu suất thu nhận đạm hòa tan đạt 81.96%, tăng 12.13 % so với trường hợp ...
6 trang | Chia sẻ: yendt2356 | Ngày: 01/12/2020 | Lượt xem: 533 | Lượt tải: 0
The study was carried out on hybrid of four breeds (♂PiDu x ♀ LY), at weaned period (From 21- 56 day olds), it consists of 4 groups: Control (DC), pilot I, II, III (TN I, TNII, TNIII). Piglets of control were fed 20% of protein ration without enzyme and the ration of TNI; TNII, TNIII have a protein levels are 20 %, 19 % and 18% added enzyme prot...
6 trang | Chia sẻ: thucuc2301 | Ngày: 01/12/2020 | Lượt xem: 520 | Lượt tải: 0
On the PGA culture medium, the research investigated the antagonism of 14 Trichoderma strains, isolated in agricultural lands of Binh Duong province, against Corticium salmonicolor of pink disease in rubber tree. The in-vitro essays indicated that almost Trichoderma strains, especially Tr12 (the 28S rRNA sequence is similar to Trichoderma harzi...
6 trang | Chia sẻ: yendt2356 | Ngày: 01/12/2020 | Lượt xem: 501 | Lượt tải: 0
To study the effect of pH on the absorption of heavy metals (As, Pb, Cd and Zn) by reed showed that As and Pb are accumulated in leaves and bodies reed with different levels in the dependent pH. The capacity to accumulate As, Pb and Cd in leaves and roots of reed in treatment 1 is the highest, which is 20.12 ppm and 75.90 ppm As; 25.67ppm and 94...
6 trang | Chia sẻ: thucuc2301 | Ngày: 01/12/2020 | Lượt xem: 531 | Lượt tải: 0