yenhoanglic

The manipulation and detection of living cells are essential requirements for many applications in biology, biotecnology and medicine. In this study, we propose a microfluidic device, which facilitated of a differential capacitively coupled contactless conductively detection (DC4D) coplanar capacitor structure and a dielectrophoresis (DEP) concentrator based on circular electrodes for detecting of living cells. With the proposed device, first, the target and non-Target cells are guided toward the center of the working chamber due to the dielectrophoresis forces. Then the target cells are captured by the electrode covered with aptamers, which possess a high affinity to the target cells. After being flushed to wash away the non-Target cells in the working chamber, the differential capacitance is read to identify the presence of target cells. Numerical simulations of the DEP manipulation and DC4D were performed to proof the concept of the proposed design. A prototype of the

This study explores the potential of removing phosphorus from aqueous solutions and sewage by Zr(IV)-loaded okara (ZLO) in the fixed-bed column. Soybean residue (okara) was impregnated with 0.25. M Zr(IV) solution to prepare active binding sites for phosphate. The effect of several factors, including flow rate, bed height, initial phosphorus concentration, pH and adsorbent particle size on the performance of ZLO was examined. The maximum dynamic adsorption capacity of ZLO for phosphorus was estimated to be 16.43. mg/g. Breakthrough curve modeling indicated that Adams-Bohart model and Thomas model fitted the experimental data better than Yoon-Nelson model. After treatment with ZLO packed bed column, the effluent could meet the discharge standard for phosphorus in Australia. Successful desorption and regeneration were achieved with 0.2 NaOH and 0.1 HCl, respectively. The results prove that ZLO can be used as a promising phosphorus adsorbent in the dynamic adsorption syste

Measurements of the cross section for producing b quarks in the reaction pp -> b (b) over barX are reported in 7 and 13 TeV collisions at the LHC as a function of the pseudorapidity. in the range 2 < eta < 5 covered by the acceptance of the LHCb experiment. The measurements are done using semileptonic decays of b-flavored hadrons decaying into a ground-state charmed hadron in association with a muon. The cross sections in the covered. range are 72.0 +/- 0.3 +/- 6.8 and 154.3 +/- 1.5 +/- 14.3 +/- mu b for 7 and 13 TeV. The ratio is 2.14 +/- 0.02 +/- 0.13, where the quoted uncertainties are statistical and systematic, respectively. The agreement with theoretical expectation is good at 7 TeV, but differs somewhat at 13 TeV. The measured ratio of cross sections is larger at lower eta than the model prediction. Title:  Measurement of the b- Quark Production Cross Section in 7 and 13 TeV pp Collisions Authors:  Aaij, R. Adeva, B. Adinolfi, M. Keywords:  ROOT-S=7 TEV;D

A lignocellulosic material extracted from rice husk (Oryza sativa), Vietnam, was modified as a new adsorbent for the removal of As(V) ions from aqueous solution. Iron was coated onto this adsorbent by hydrolization of ferric nitrate while adding an alkaline solution drop wise into the batch type reactor. The adsorption of As(V) ions from aqueous solution on coated rice husk was then studied at varying pH, As(V) concentrations, contact times, ionic strength, and adsorbent amounts. The minimum contact time to reach equilibrium is about 6 h. The adsorption of As(V) anions on the coated rice husk was found to be highly pH dependent due to Coulomb interactions between As(V) species in solution and positively charged surface groups RH-FeOOH, as well as formation of chelate complexes with naturally occurring carboxyl and carbonyl functional groups in the matrix. As(V) adsorption on Fe(III)-coated rice husk (RH-FeOOH) from aqueous solution was studied in the pH range 2-10. The ma

Although various programs of waste separation at source have been deployed over the last decades in developing countries, they have stopped at the level of pilot-programs and have generally not been replicable. This empirical study aims to investigate the factors influencing the intentions in separating waste of residential households in Vietnam's capital city, Hanoi. The waste separation intentions of respondents were judged by the amount of the cash fine that each household was willing to pay as a commitment to participation. An econometric analysis was employed to demonstrate that trust, personal moral norms, perceived difficulties and reciprocity are important factors explaining the residents' behavioral intentions in waste separation. These findings suggest that apart from the improvement of institutional capacity and guarantee of satisfactory facilities and vehicles, communication campaigns to consolidate trust and inspire moral obligations of residents als

Title:  Cơ sở khoa học cho định hướng phát triển kinh tế sinh thái tại đảo Lý Sơn, tỉnh Quảng Ngãi : Luận văn ThS. Khoa học môi trường và bảo vệ môi trường: 60 85 02 Authors:  Lê, Đức Tố , người hướng dẫn Lê, Thị Hoa Keywords:  Khoa học môi trường;Quảng Ngãi;Phát triển kinh tế;Kinh tế sinh thái Issue Date:  2012 Publisher:  ĐHKHTN Abstract:  111 tr. + CD-ROM Luận văn ThS. Khoa học Môi trường -- Trường Đại học Khoa học Tự nhiên. Đại học Quốc gia Hà Nội, 2012 Xây dựng cơ sở khoa học cho mô hình phát triển kinh tế sinh thái đảo Lý Sơn, tỉnh Quảng Ngãi. Nêu các nhiệm vụ: đánh giá thực trạng điều kiện tự nhiên, phát hiện tiềm năng phát triển và những hạn chế trong phát triển của đảo Lý Sơn; Đánh giá thực trạng phá (...) Electronic Resources URI:  http://repository.vnu.edu.vn/handle/VNU_123/38205 Appears in Collections: HUS - Master Theses

Title:  Nghiên cứu hiệu quả và đề xuất giải pháp công nghệ xử lý nước thải chứa crôm bằng phương pháp hóa học tại Công ty TNHH Tae Yang Việt Nam : Luận văn ThS. Khoa học môi trường và bảo vệ môi trường: 60 85 02 Authors:  Trần, Văn Quy, người hướng dẫn Đinh, Thị Huyền Nhung Keywords:  Nước thải;Xử lý nước thải;Khoa học môi trường;Công nghệ môi trường;Phương pháp hóa học Issue Date:  2012 Publisher:  ĐHKHTN Abstract:  58 tr. + CD-ROM Luận văn ThS. Khoa học môi trường -- Trường Đại học Khoa học Tự nhiên. Đại học Quốc gia Hà Nội, 2012 Tìm hiểu quy mô, hiện trạng và công nghệ sản xuất tại Công ty (trách nhiệm hữu hạn) TNHH Tae Yang Việt Nam. Nghiên cứu đặc tính nước thải và hiện trạng xử lý. Khảo sát các yếu tố ảnh hưởng đến quá trình khử Cr6+ về Cr3+. Khảo sát các yếu tố ảnh hưởng đến q (...) Electronic Resources URI:  http://repository.vnu.edu.vn/handle/VNU_123/38206 Appears in Collections: HUS - Master Theses