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Optimizing dna extraction condition from wood using response surface methods - Du Phuc ThinhFrom the result of electrophoresis of total DNA with 1 % gel agarose (Figure 4) it is shown that the brightest bands are 7, 8, 9 corresponding to leaves samples, followed by the bands 1, 2, 3 corresponding to fresh wood samples; finally the bands 4, 5, 6 corresponding to dry wood. Results of the visual observations showed that the DNA extraction...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 1042 | Lượt tải: 0
Levels and water soluble organic carbon of atmospheric nanoparticles in a location of Ha Noi, Viet NamThis study was designed to contribute to initiate the researches of nanoparticles in Viet Nam. Mass concentrations, number concentration and WSOC of NPs at a mixed site of Ha Noi in the rainy season and the dry season were determined. The mass concentrations of nanoparticles were 4.76 µg/m3 to 5.42 µg/m3 while the number concentrations of these ...
11 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 806 | Lượt tải: 0
Influence of polyethylene oxide content on some characteristics of pla/cs films loading nifedipinePEO has an important role in significant improvement of the interaction between PLA, CS and NIF. The PEO content is affected on hydrophobicity and water absorption of the PLA/CS/NIF films. Using PEO in PLA/CS/NIF films, CS and NIF are dispersed more regularly with the smaller size in comparison to PLA/CS/NIF film. Especially, at 6 % of PEO conte...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 788 | Lượt tải: 0
Optimization of the enzyme assisted extraction of essential oil from the leaves and branches of cinnamomum cassia using box-Wilson methodThe application of the response surface methodology, in this particular case, the application of a fractional and orthogonal central composite design to construct a statistical model of the process has led to second-order polynomials that fitted well with the experimental data and described in detail the effects of individual parameter as well a...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 849 | Lượt tải: 0
The size effect in mechanical properties of boron nitride nanotube under tension - Nguyen Danh TruongMechanical properties of BN-NTs under uniaxial tension are investigated using atomic finite element method. Main findings are listed as follows: • The BN armchair tubes exhibit stronger than the BN zigzag ones under axial tension. • The BN-NTs exhibit brittle fracture. Location of fracture took place at the middle of BN (14, 0) zigzag tube wher...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 875 | Lượt tải: 0
Water-Soluble components of ancistrocladus cochinchinensis - Le Quynh LienCompound 4 was isolated as white powder. There are three protons of a trisubstituted aromatic ring at 6.98 (1H, d, J = 8.5 Hz), 6.44 (1H, d, J = 2.5 Hz) and 6.60 (1H, dd, J = 3.0, 8.5 Hz); two singlet equivalence protons 7.32 (2H, s); three aromatic methoxy groups at 3.85 (6H, s, 2 x CH3) and 3.79 (3H, s); and an anomeric of a β-oriented sugar m...
7 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 712 | Lượt tải: 0
Experimental cultivation of spirulina platensis using my an mineral water, Thua Thien Hue provinceMy An mineral water was suitable for the growth of Spirulina platensis after removing H2S. Productivity of Spirulina platensis cultivated in My An mineral water was about 10 g/m2.day. Spirulina platensis biomass had good quality with high amount of crude protein and fatty acids, reaching 68.32 % and 7.32 %, respectively. In addition, the amount ...
9 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 865 | Lượt tải: 0
The effects of silver nanoparticles on growth of chrysanthemum morifolium ramat. cv. "jimba" in different cultural systemsSilver nanoparticles are suitable for in vitro Chrysanthemum growth in various culture systems: in vitro solid medium, in vitro liquid medium and microponic system are 1.5; 1.5; 5 ppm, respectively. Different culture systems have different SNPs absorbability which directly proportional to the culture time and inversely proportional to the SNPs c...
12 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 702 | Lượt tải: 0
Influence of synthesis factors on properties of geopolymers based on red mud and rice husk ash - Tran Ngoc TuyenGeopolymers was successfully synthesized from RM and RHA under the most appropriate conditions that were: (i) initial material compositions were RM, RHA and NaOH with SiO2/Al2O3 molar ratio of 4 and Na2O/Al2O3 molar ratio of 2.0; (ii) curing temperature of 100oC; (iii) curing time of 24 hours. The physico-mechanical properties including compress...
14 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 757 | Lượt tải: 0
Effect of some effective parameters on cod removal from Nam Son landfill leachate by electrocoagulationThe study indicated several properties of Nam Son landfill leachate, COD, NH4+ and pH in particular with the concentration in the range of approximately 6247 ± 295, 1270 ± 38 mg/l and 8 respectively. With the increase in current (1 to 4 A), the COD removal efficiencies increased from approximately 50 to 78 % (pH = 8 and operating time = 40 min)....
8 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 1045 | Lượt tải: 0
