Tài liệu miễn phí Sinh học
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Synthesis, structure and cytotoxic activity against liver cancer cell (Hepg2) of some N-substituted hydrazides containing heterocycle from 5-chloro-2-hydroxybenzohydrazide or 2-hydroxy-5-iodobenzohydrazide
5-Chloro-2-hydroxybenzohydrazide and 2-hydroxy-5-iodobenzohydrazide were synthesized from 5-chloro-2-hydroxybenzoic acid and methyl 2-hydroxybenzoate (methyl salicylate), respectively. The reaction of these 5-halogeno-2-hydroxybenzohydrazides with appropriate heteryl methyl ketones gave eight new N-substituted hydrazides.
12/29/2020 10:21:02 AM +00:00
Improving quality of sexual and reproductive health education: Pilot intervention with lower secondary school teachers and pedagogical students in some educational institutions in Vietnam
This study examined training modules for lower secondary school teachers and pedagogical students in order to improve their knowledge and motivation in sexual and reproductive health (SRH) education in their schools. An intervention study was conducted from 2013 to 2016 with 128 lower secondary school teachers and 100 pedagogical students.
12/29/2020 10:13:20 AM +00:00
Tuberculosis diagnosis by multiplex PCR technique with three target gene IS6110, IS1081, 23S rDNA at Hai Duong tuberculosis and lung disease hospital
In this study, 100 specimens from tuberculosis confirmed patients and suspected patients who were treated in Hai Duong Tuberculosis and Lung Disease Hospital to perform 3 simultaneous M. tuberculosis detection methods as multiplex PCR assay, direct sputum smear (AFB) and bacterial culture (BK).
12/29/2020 10:13:11 AM +00:00
Distribution of APOE polymorphism among primary school children in some northern provinces of Vietnam
APOE gene plays an important role in immunity and metabolism regulating, especially in lipid metabolism. Cross-sectional study was conducted on 300 children at the age of 6-11 in Hanoi, Thai Nguyen, and Hai Duong province to investigate the varying distribution of the APOE genotype by Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR -RFLP) method.
12/29/2020 10:13:04 AM +00:00
The effect of three nutrient solutions including hydro greens, knop and bio life on some parameters related yield and quality of hydroponic vegetable mustard (Brassica integrifolia)
The nutrient solution is an important factor which directly effects on growth and development of hydroponic crops. Therefore, finding appropriate nutrient solution for each plant is necessary to ensure hydroponic crop yields. In this study, the effects of three common nutrient solution including Hydro Greens, Knop and Bio-life on vegetable mustard (Brasscia integrifolia) growth were evaluated.
12/29/2020 10:12:58 AM +00:00
Synergic effect of different phytase preparations in feed
In comparison to both single phytases, this combination has improved the hydrolytic catalysis of phytate in rice bran, corn and soybean powder; resulted in higher amount of inorganic phosphate released in two phases – in vitro digestion. Further studies of this combination on monogastric animals shall be carried on to confirm the synergic effect of these two phytases.
12/29/2020 10:12:52 AM +00:00
Effects of arbitrarily high fat diet feeding on food intake and body and tissue weights in swiss mice
In this study, we investigated effects of high-fat diet (HFD) on food intake and body and tissue masses in mice. Male Swiss mice at four-week of age were arbitrarily fed either a regular diet (RD) or a HFD (RD supplemented with 30% energy from lard) for 12 weeks.
12/29/2020 10:12:46 AM +00:00
Computational analysis of the methionine sulfoxide reductase gene family in soybean (Glycine max) and their response in abiotic stresses
In this study, we used various computational approaches to analyze the promoter regions of all members of the methionine sulfoxide reductase (MSR) family. The presences of many cis- regulatory elements related to the light responsiveness, tissue specific expression, hormonal and/or stress responsiveness indicated that GmMSR gene family may be involved in the various developmental processes, perhaps in the response to environmental conditions of soybean plants.
12/29/2020 10:12:39 AM +00:00
Study the adaptive morphological characteristics of the root of natural Calamus platyacanthus Warb. ex Becc. in Tamdao national park in different soil environments
This article describes the difference of morphological and structural characteristics of the roots of Calamus plants growing in those two relatively distinct environments. The result showed that the roots of Calamus express the general characteristics of monocots; there was no secondary growth; the vasculation of the pillar demonstrated many differences to that of a general monocot.
12/29/2020 10:12:33 AM +00:00
A comparative study on vascular and supporting systems in several leaf types of arecaceae species
Vascular and supporting systems play important roles and are closely related to leaf morphology. To understand and compare vascular and supporting systems in several leaf types in Arecaceae, we studied leaf structure of species in different genera, including Cocos nucifera, Phoenix roebelenii and Calamus tetradactylus. T
12/29/2020 10:12:27 AM +00:00
The diversity of medicinal plants cultivated in the gardens of Thai people in Pu Luong nature reserve, Thanh Hoa province
Study on diversity of Thai People in Pu Luong Nature Reserve, Thanh Hoa province, including 40 cultivated species belonging to 37 genera of 31 families for medicine. These plant species are used in 43 traditional medicinal recipes, 14 of which consist of all cultivated plant species, for the treatments of various diseases, mostly common ones.
12/29/2020 10:12:20 AM +00:00
Evolutionary analysis and expression profiling of the SWEET sugar transporter gene family in cassava (Manihot esculenta Crantz)
SWEETs play important roles in various biological processes, including plant growth, development, and response to environmental stimuli. Previously, we comprehensively found a total of 28 members of MeSWEET gene family in cassava (Manihot esculenta Crantz). Most of MeSWEET genes had 6 exons and 5 introns. In this study, 6 MeSWEET duplicated pairs, including 5 segmental and 1 tandem duplication events were manually predicted in cassava genome.
12/29/2020 10:12:14 AM +00:00
Genetic diversity of mutative line group arising from Tam Thom rice variety
The 45 indicators on morphological, agro-biological, productive and qualitative characteristics were used to determine phenotypic diversity of the 20 mutative lines arising from Tam Thom variety, when they were planted in the Spring crop and Autumn crop.
12/29/2020 10:12:07 AM +00:00
SinV2(N = 1 - 8) clusters: A dft investigation on their dissociation behaviors
The method of density functional theory using B3P86/6-311+G(d) functional/basis set have been performed for searching stable structures and preferable dissociation channels of the doubly vanadium-doped silicon cationic clusters SinV2 + (n = 1 - 8).
12/29/2020 10:11:55 AM +00:00
Optimization of yield in the synthesis of 2-chloroquinoline-3-carbaldehyde by box-hunter designed experiments via the vilsmeier-haack reaction
2-chloroquinoline-3-carbaldehyde (QCl) is one of key organic compounds for synthesizing numerous products which possess biological potential. According to Vilsmeier - Haack, QCl was prepared by refluxing a mixture of acetanilide (A) and phosphoryl chloride (P) in N,N-dimethylformamide (D).
12/29/2020 10:11:49 AM +00:00
Research on technology of copper powder production from the poor copper oresby Bio-leaching method
This paper describes the research on the production of copper powder from the waste ore of the copper mining process (at poor copper ore of Sin Quyen Copper Mine) by bio-leaching method using microorganisms capable to oxidize sulfide ore, separating copper in the copper salts to produce copper powder.
12/29/2020 10:11:42 AM +00:00
Study the adaptive morphological characteristics of the root of natural calamus Calamus platyacanthus Warb. ex Becc. in tamdao national park in different soil environments
This article describes the difference of morphological and structural characteristics of the roots of Calamus plants growing in those two relatively distinct environments. The result showed that the roots of Calamus express the general characteristics of monocots; there was no secondary growth; the vasculation of the pillar demonstrated many differences to that of a general monocot.
12/29/2020 10:01:59 AM +00:00
A new derivative of butanenitrile from Euphorbia hirta L.
From the ethyl acetate extract of Euphorbia hirta L. collected in Vietnam, four isolated compounds were gallic acid, blumenol C glucoside, corchoionoside C and 3,4-dihydroxy-2-methylenebutanenitrile 4-O--D-glucopyranoside. The structures of these compounds were elucidated by spectroscopic data and compared with the literature.
12/29/2020 9:51:22 AM +00:00
Aqueous enzymatic extraction of camellia seed oil (Camellia oleifera) from Vietnam
Aqueous enzymatic extraction method was applied to extract oil from camellia seed (Camellia oleifera). Effects of individual enzymes, pH, reaction time and temperature were studied. The effects of hexane and aqueous enzymatic extraction on the oil„s physico-chemical properties (fatty acid compositions, free fatty acid) were compared.
12/29/2020 9:50:55 AM +00:00
Characterization and bio activity evaluation of two new acetohydrazide synthesized from curcumin and monocarbonyl curcumin analog
ince the acetohydrazides are important starting materials in organic synthesis, the complicated structures of the acetohydrazides were characterized carefully with modern physical methods including IR, NMR and MS spectra. Almost all carbons and protons of A3 and B3 were assigned. Bio-activity testes showed that both were inactive on KB cell line and against bacteria.
12/29/2020 9:49:35 AM +00:00
Simultaneous determination of selected flavour enhancers in beef Pho broth samples by chemometrics - Assisted spectrophotometry
The chemometrics-assisted spectrophotometry has been studied for simultaneous determination of monosodium glutamate (MSG), disodium guanylate (DSG) and disodium inosinate (DSI) in beef Pho broth. The effect of protein was eliminated by precipitation with ammonium sulfate.
12/29/2020 9:46:28 AM +00:00
Structure and magnetization of LaFe1-xCoxO3 perovskite nanomaterials synthesized by co precipitation method
In this study, we illustrate full data of synthesis, structural characteristic and magnetic property of Co(II)-dopped LaFe1-xCoxO3 (x = 0.1, 0.2, 0.3) perovskite nanoparticles by hydrolysis of La(III), Fe(III), Co(II) cations in boiling water, corresponding to precipitation of using solution of KOH 5 (w/w).
12/29/2020 9:46:22 AM +00:00
Fusing two phytase genes by PCR - Driven overlap extension
The PCR-driven overlap extension is a modern technique to fuse two or more DNA fragments. Two genes, appA coding for acidic phytase from E. coli B and the phyC coding for alkaline phytase from Bacillus subtilis, were successfully fused using a linker of five residues to form an overlapping primers.
12/29/2020 9:46:09 AM +00:00
Determining KCNJ11 E23K polymorphism in a group of Vietnamese population by restriction fragment length polymorphism method
The potassium inwardly rectifying channel, sub-family J, member 11 (KCNJ11), which is a pore-forming sub-unit of ATP sensitive potassium channels in pancreatic B-cells, plays a critical role in the regulation of insulin secretion. A non-synonymous E23K variant (SNP rs5219) in the KCNJ11 gene, which results from C to T transition and substitutes glutamate for lysine at position 23, is identified as a SNP associated with prediabetes and type 2 diabetes.
12/29/2020 9:44:40 AM +00:00
Antifungal ability of some mangrove endophytic actinomycetes in Vietnam
The number and distribution of actinomycetes are very different in 10 species. In this study, 114 endophytic actinomycetes were isolated from 10 mangrove species in Giao Thuy, Nam Dinh: of which 44 strains were from their fruits, 40 from leaves, 21 from roots; 5 from trunks and 4 from flowers.
12/29/2020 9:43:21 AM +00:00
Tiềm năng của thí nghiệm trong dạy học sinh học theo định hướng phát triển năng lực người học
Dạy học môn Sinh học theo định hướng phát triển năng lực người học đòi hỏi giáo viên cần quan tâm hơn đến việc sử dụng thí nghiệm trong dạy học nhằm hình thành và phát triển ở học sinh năng lực Sinh học bên cạnh các năng lực chung. Bài viết này, tập trung phân tích các tiềm năng của việc sử thí nghiệm trong dạy học Sinh học theo hướng tiếp cận dạy học mới, đồng thời xác định cách thức sử dụng hiệu quả các thí nghiệm.
12/29/2020 9:15:06 AM +00:00
Xác định hàm lượng rutin trong một số cao dược liệu hoa hòe được sử dụng làm nguyên liệu trong các chế phẩm thực phẩm bảo vệ sức khỏe bằng phương pháp HPLC-UV
Bài viết tiến hành thực nghiệm khảo sát hàm lượng Rutin trong một số mẫu cao dược liệu Hoa Hòe (cao được chiết bằng các dung môi hoặc tỷ lệ dung môi khác nhau) bằng phương pháp sắc ký lỏng hiệu năng cao.
12/29/2020 9:10:33 AM +00:00
Xây dựng và thẩm định phương pháp xác định chất dị nguyên casein trong sữa và các sản phẩm từ sữa
Bài viết khảo sát phương pháp ELISA để xác định được casein ở mức hàm lượng thấp (áp dụng cho đối tượng chất dị nguyên trong sữa với mức 10 µg/g), ngoài ra phương pháp HPLC cũng được khảo sát để xác định các dạng casein, từ đó phân biệt được sản phẩm sữa bò và các loại sữa khác hoặc trộn trái phép các loại sữa khác như sữa dê, sữa cừu vào sữa bò nhằm gây nhầm lẫn cho người tiêu dùng.
12/29/2020 9:10:26 AM +00:00
Xây dựng phương pháp định lượng nhanh vi khuẩn Lactobacillus acidophilus trong men vi sinh bằng kỹ thuật Real-time PCR
Bài viết tiến hành nghiên cứu và xây dựng phương pháp định lượng nhanh L. acidophilus trong men vi sinh bằng kỹ thuật real-time PCR dựa trên trình tự đoạn gen Hsp. Mời các bạn cùng tham khảo bài viết để nắm chi tiết hơn nội dung nghiên cứu.
12/29/2020 9:10:20 AM +00:00
Xác định đồng thời một số Pyrrolizidine alkaloids trong thực phẩm bảo vệ sức khỏe có nguồn gốc thảo dược
Kỹ thuật sắc ký lỏng khối phổ hai lần (LC-MS/MS) đã được nghiên cứu nhằm xây dựng và thẩm định phương pháp xác định 4 pyrrolizidine alkaloids (PAs) độc trong các sản phẩm thực phẩm bảo vệ sức khỏe (TPBVSK) có nguồn gốc thảo dược, bao gồm intermidine, senecionine, echimidine và jacobine. Bài viết tiến hành xác định đồng thời một số Pyrrolizidine alkaloids trong thực phẩm bảo vệ sức khỏe có nguồn gốc thảo dược. Mời các bạn cùng tham khảo!
12/29/2020 9:09:41 AM +00:00