Development of spectrophotometric method for determination of ceftazidime with the bratton– marshall reagent in pharmaceutical preparationThe proposed method was applied successfully for determination of the studied drugs in their pharmaceutical dosage forms (injections). The relative standard deviation values are below 2 % indicating the precision of the method. The validations of the proposed methods were further confirmed by recovery studies. The % recovery vary from 98.95 ± 0....
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 559 | Lượt tải: 0
Secondary metabolites from micromonospora sp. (g044) - Cao Duc TuanCompound 5 was obtained as a white solid. The ESI mass spectrum of 5 showed a base peak at m/z 245.1 [M+H]+. In the 1H-NMR, compound 5 displayed signals of two olefin protons at δH 5.72 (1H, d, J= 8.0 Hz, H-5), 8.02 (1H, d, J= 8.0 Hz, H-6) and a set of the protons of arabionoside sugar moiety at δH 3.75 (1H, dd, J=3.0, 12.5 Hz, Ha-5), 3.86 (1H,...
7 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 559 | Lượt tải: 0
Effect of modified atmosphere packaging (map) and postharvest treatments on quality of litchi fruits during storageThe results showed that treatment of litchi by hot water at 47 oC for 7 min., then dipped in a oxalic acid solution (pH = 3 for 6 min.), finally packed in MAP bags with the thickness of 30 µm (incorporated 3-5 % silica additives) and stored at 4 ± 1oC, 90 % humidity can extend the storage time to 35 days (5 weeks) at the decay incidence < 10 %, ...
8 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 540 | Lượt tải: 0
High order sliding mode control with anti-Sway based compensation on artificial neural network by pso algorithm for overhead craneFrom Figure 4, Figure 5, Figure 6 and Figure 7, it can be seen that ability of resisting disturbance of high order sliding mode controller is very good. But, the quality of swing angle is not good . Although the trolley reaches desired position, but the oscillation of the load is still large. To fix this problem, RBFNs is used for generating op...
10 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 469 | Lượt tải: 0
An initial study on chemical constituents of bischofia javanica - Nguyen Thi MaiCompounds 3, 4, and 5 were identified as hexyl-O-β-D-glucopyranoside [16], friedelan-3- one [17], and gallic acid [18] based on their spectral evidence, which were in agreement with those of the reported data in the literature, respectively. Among isolated compounds, the compounds 1, 2 and 3 were firstly isolated from B. javanica leaves. Meanwhi...
7 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 570 | Lượt tải: 0
A data-Driven framework for remaining useful life estimation - Nguyen Dinh HoaAll three mentioned RUL estimation methods depend heavily on similarity search algorithm. The outputs of similarity search can be used intuitively. Specifically, the similarity searching algorithm helps find out the most matched data from the library for the current query based on a distance function. These distances depend heavily on the length...
15 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 500 | Lượt tải: 0
Effects of partial replacement of nitrite by annatto (bixa orellana l.) seed powder on the properties of pork sausagesTaken together, annatto seed powder might be suitable for the replacement of nitrite in pork sausauge manufacture. Annatto seed powder improves the color and texture properties of sausages. Moreover, annatto added samples of sausage were more effective to retard lipid oxidation as well as inhibit the growth of microorganisms than the blank treat...
10 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 552 | Lượt tải: 0
Phylogenetic diversity of microorganisms asscociated with three marine sponges from Mien Trung sea of Viet NamThaumarchaeota represent a unique phylum within the domain Archaea that embraces ammonia-oxidizing organisms from soil, marine waters, and hot springs [16]. Thaumarchaeota were detected in different abundances in many other marine sponges, including Arctic and Irish deep-sea environments [17, 18]. This phylum was discovered in all three our spon...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 561 | Lượt tải: 0
Đánh giá mức độ phì dưỡng của một số hồ nội thành Hà Nội - Nguyễn Thị Bích NgọcUrban lakes in Hanoi play different important roles in the human life such as acclimatization, culture, tourist, etc. However, under the pressure of urbanization coupled with unreasonable water sewage collector system, and pollutants discharged directly into lakes have been increased, causing water pollution in lakes. This paper presents the mon...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 627 | Lượt tải: 0
Novel compact dual-Broadband planar metamaterial antenna - Dang Nhu DinhA compact dual-broadband metamaterial antenna has been designed, fabricated and measured. The proposed antenna used composite right-left handed transmission line (CRLH-TL)Novel compact dual-broadband planar metamaterial antenna for size reduction, combined with fringing effects of metamaterial to achieve dual frequency bands. Gradual transform w...
13 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 471 | Lượt tải: 0
