Solid phase

Xem 1-20 trên 82 kết quả Solid phase
  • A new automated procedure for preconcentration and analysis of anionic surfactants in water using solid-phase extraction (SPE) in a flow injection (Fl) system together with an UV-vis detection is reported in this paper. The method involves extraction of blue coloured ion-pair complex of anionic surfactants and methylene blue into solid phase and their elution from the SPE column with organic solvent (chloroform stabilised with methanol) and subsequent measurement in an UV-vis flow cell at 650 nm. The system is well optimised before to apply for analysis of real samples.

    pdf6p uocvong03 24-09-2015 12 3   Download

  • Tham khảo tài liệu 'báo cáo hóa học: "solid-phase microextraction for bioconcentration studies according to oecd tg 305"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf8p dauphong15 18-02-2012 19 3   Download

  • Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học được đăng trên tạp chí toán học quốc tế đề tài: Solid-phase microextraction for bioconcentration studies according to OECD TG 305

    pdf8p dauphong11 04-02-2012 31 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Solid-phase microextraction for bioconcentration studies according to OECD TG 305

    pdf8p sting06 16-02-2012 18 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A solid-phase dot assay using silica/gold nanoshells

    pdf6p dauphong18 09-03-2012 13 3   Download

  • According to ASTM Standard Guide nondestructive term Test, the sound emission is usually defined as the class of phenomena whereby transient elastic waves generated by the rapid release of energy from source localization in the material. Energy consumption is essentially due to phase converter, crack formation and development, friction or movement of dislocations. Acoustic emission signal can be generated by phenomena such as cavitation, leakage, solidification and liquefaction.

    pdf174p lulanphuong 27-03-2012 40 5   Download

  • Epoxy resin networks have been modified with hybrid copolymer consisting of an urethane prepolymer and a solid bisphenol A diglycidyl ether. Hybrid copolymer prepared from isocyanate-terminated urethane (NCOPUER) resulted in cured transparent epoxy networks with no discernible phase-separated morphology, as indicated by scanning electron microscopy.

    pdf6p uocvong01 24-09-2015 7 2   Download

  • Studies assessing the role of ICTP levels in GCF or peri-implant crevicular fluid as a diagnostic marker of periodontal disease activity have reported promising results so far (Oringer et al. 1998, 2002). ICTP was suggested to predict future bone loss, to correlate with clinical parameters and putative periodontal pathogens and also to reduce following periodontal therapy (Giannobile 1999).

    pdf170p pt_1669 26-03-2012 215 99   Download

  • While patterns of improvement can be observed as greater or lesser according to the background characteristics of students in this study, statistical analysis has meant that no generalisation regarding the kind of student most likely to improve can be reliably made. It is nevertheless interesting to consider the characteristics of each of the individuals who did show the greatest increase in their IELTS Test results. Of the 40 students who participated in this study, only eight managed to improve by one IELTS band in their Overall score.

    pdf23p dambaotaikhoan 04-05-2013 47 27   Download

  • This first part is concerned with processes in which the kinetic behaviour of a gaseous phase is rate-determining. The range of processes includes some which are carried out in vacuum systems in which Knudsen or free evaporation occurs from a condensed phase, to transport reactions where a chemical reaction occurs between a solid and the gaseous phase to produce molecular species containing some or all of the elements occurring in the solid phase.

    pdf393p nhatkyvodanh 11-08-2012 49 25   Download

  • Soil Solution–Solid Phase Equilibria Có một số phản ứng hóa học phức tạp có thể xảy ra trong đất. Những phản ứng khác nhau tương tác với nhau thông qua các giải pháp đất (Hình 4.1). Các dung dịch đất được định nghĩa là giai đoạn lỏng dung dịch nước của đất và các chất tan của nó (Bảng thuật ngữ của Điều khoản Khoa học Đất, 1997).

    pdf18p xuongrong_battien 24-10-2011 57 23   Download

  • Fractures are ubiquitous in the brittle lithosphere in the upper part of earth’s crust. They play a critical role in the transport of fluids. Moreover, all major discovered geothermal reservoirs and a considerable number of petroleum reservoirs are in fractured rocks. This restates the importance of studying multiphase flow behavior inside the opened fracture space. From the engineering point of view, a rock fracture as defined here is simply a complex-shaped cavity filled with fluids or solid minerals. Therefore it is understood to include cracks, joints, and faults.

    pdf0p aries23 29-09-2012 51 22   Download

  • This epigraph is very correct for the Russian Federation today because the average lifespan of Russian men in this country is 57 years (Russian women are living on ten years more). It is statistical data. Russian scientists are an exception. Particularly, the majority of contributors of this volume are older then 60 and the editor of volume is older then 75.

    pdf347p xrzc1-1 16-09-2013 32 16   Download

  • Chemical reactions (abiotic reactions) are “classical” chemical reactions that are not mediated by bacteria. They may include reaction processes such as precipitation, hydrolysis, complexation, elimination, substitution etc. that transform chemicals to other chemicals and potentially alter their phase/state (solid, liquid, gas, dissolved). Precipitation is the removal of ions from solution by the formation of insoluble compounds, i.e. a solid-phase precipitate. Hydrolysis is a process of chemical reaction by the addition of water.

    pdf208p cao_can 29-12-2012 39 13   Download

  • Introduction: The electrolyte solution is a major component of all battery systems and as such will greatly influence energy densities (thermodynamic properties such as Gibbs energy, enthalpy, and ionic activity) and power densities (nonthermodynamic properties such as viscosity, conductivity, and transference). The electrolyte solution consists of a liquid or solid phase containing at least one component, e.g., water, which is called the solvent, and an ionizable substance, e.g., a salt or an acid, which is called the electrolyte. ...

    pdf6p congdat261 06-12-2010 67 12   Download

  • Research activities in laser physics and in photonics technologies over the last two decades have continuously produced a large diversity of new advances. Several examples illustrate the major impact of optics in the quantum sciences, engineering, metrology, communication fiber networks, or high-capacity data storage. Besides these established fields of research and development for industry or for the consumer markets, laser optics will certainly disseminate in the near future in new areas such as biology, chemistry, medicine, or nanotechnologies.

    pdf424p nhulan0908 30-09-2012 37 12   Download

  • The Physical Chemistry In Brief offers a digest of all major formulas, terms and definitions needed for an understanding of the subject. They are illustrated by schematic figures, simple worked-out examples, and a short accompanying text. The concept of the book makes it different from common university or physical chemistry textbooks. In terms of contents, the Physical Chemistry In Brief embraces the fundamental course in physical chemistry as taught at the Institute of Chemical Technology, Prague, i.e.

    pdf466p tuanloc_muido 07-12-2012 32 15   Download

  • Put options granted to non-controlling interests of subsidiaries are measured at the exercise price and classified as a financial liability, with a deduction from non-controlling interests on the consolidated statement of financial position at each reporting date.Prior to January 1, 2010, the effective date of IAS 27 (Amended) Consolidated and separate financial statements, where the exercise price exceeded the balance of non-controlling interests, the difference was recognized as an increase in the goodwill of the subsidiary.

    pdf344p tay_thi_le 19-02-2013 32 11   Download

  • The heat transfer and analysis on laser beam, evaporator coils, shell-and-tube condenser, two phase flow, nanofluids, and on phase change are significant issues in a design of wide range of industrial processes and devices. This book introduces advanced processes and modeling of heat transfer, flat miniature heat pipe, gas-solid fluidization bed, solidification phenomena, thermal approaches to laser damage, and temperature and velocity distribution to the international community.

    pdf398p ktcn_1 10-07-2012 46 10   Download

  • In the next block processing features to detect a particular event in the case external devices, or to identify, study, and signal the brain to recognize patterns, will be used as input for the following blocks that translate to control command of the external device. Last but not least important, is the block set effects supervision Operative mode of BCI devices under the supervision of users, this is if the device is active in on-line / Off linemode, or if it ismodifying its internal parameters in the learning phase in order to regulate the activity of users....

    pdf252p lulanphuong 26-03-2012 53 9   Download


Đồng bộ tài khoản