Xem 1-20 trên 133 kết quả Separation method
  • The term DNA sequencing refers to methods for determining the order of the nucleotides bases adenine,guanine,cytosine and thymine in a molecule of DNA. The first DNA sequence were obtained by academic researchers,using laboratories methods based on 2- dimensional chromatography in the early 1970s. By the development of dye based sequencing method with automated analysis,DNA sequencing has become easier and faster.

    pdf183p thienbinh1311 13-12-2012 44 14   Download

  • This book is dedicated to the rapidly grown field of microporous ceramic membranes with separating layers of pore diameter less than 2 nm. In spite of the recent rapid growth of the research effort directed towards the development of microporous ceramic membranes the field is still considered to be at its infancy and exhibits a significant future growth potential.

    pdf525p nhulan0908 30-09-2012 21 6   Download

  • Flow measurement is a basic tool in industry, engineering and research. The existing applications reveal the evolution and development of new methods and devices through the years. Some of the latest emerging technologies, such as microelectronics and nanotechnology, have put forward new challenges in the flow measurement and are treated at the beginning of this book. This book comprises 8 chapters divided into 4 sections, starting with “microflows”, followed by the “biphasic” and “gas flow”.

    pdf194p qsczaxewd 22-09-2012 15 4   Download

  • Details of included studies, livestock products analysed, laboratory methods and units of measurement, and dot plots of results, are presented by nutrient category in Appendix 13. Analyses excluded extreme outliers and graphically reported data (listed in Appendix 15). Summary results of the analysis comparing the content of nutrients and other substances from organically and conventionally produced livestock products are presented in Table 3 (results presented for all studies and for satisfactory quality studies separately). ...

    pdf41p ut_hai_can 29-12-2012 17 4   Download

  • An appropriate liquid-liquid phase separation is critical for the preparation of nanofibers and does not occur in all solvents that’s why selection of solvent and phase separation temperature is crucial for the formation of nanofibers. When the condition are favourable, liquid-liquid phase separation produce three dimensional fibrous structure with nano scaled architecture similar to that of collagen type I, and used in various biomedical applications.

    pdf17p quynho77 13-11-2012 18 1   Download

  • The following chapters discuss architects who have honed digital-fabrication techniques on pecific projects. Each discussion is accompanied by a detailed breakdown of the fabrication technique, providing insight into the recent projects featured in ach chapter. These are projects that concentrate on he fertile realm of one-to-one-scale experimentation, which demands reciprocity between design and mpirical innovation. The final outcomes hinge on he ability to reconcile the developmental shifts in material and working method.

    pdf6p quynho77 13-11-2012 16 0   Download

  • For many years, the stock and futures markets have been consid- ered separate and distinct entities. Stocks (securities) have been the backbone of capitalism and are still regarded as such today. Stocks are considered the “stuff” of which all “good investments” are fash- ioned. Not only has stock and bond trading been considered neces- sary for the survival of industry and business in a capitalist society, but it has also been regarded as the single most viable form of in- vesting for the general public.

    pdf214p 951847623 09-04-2012 91 32   Download

  • The primary focus of this chapter in on general approaches and considerations toward development of high-performance liquid chromatography (HPLC) methods for separation of pharmaceutical compounds, which may be applied within the various functions in the drug development continuum. It is very important to understand the aim of analysis and the requirements for a particular method to be developed. The aim of analysis of each HPLC method may vary for each developmental area in the drug development process and specific examples are given in Section 8.2.

    pdf21p bigbaby87 03-09-2010 83 23   Download

  • Written by a multidisciplinary group of scientists from around the globe Environmental Restoration of Metals-Contaminated Soils provides a summary of the current environmental remediation technology.

    pdf291p 951628473 04-05-2012 59 22   Download

  • Choice of Stationary Phase Ideally for a reversed-phase separations, the retention factors (k) for all com- ponents in a sample should lie between 1 and 10 to achieve separation in a reasonable time. For a given stationary phase the k of a particular component can be controlled by changing the solvent composition of the mobile phase. However, the impact of eluent composition will depend on the type of sta- tionary phase and the nature of the components in the mixture.

    pdf17p bigbaby87 03-09-2010 46 17   Download

  • Polymorphism Polymorphism The last important concept of object-oriented programming that we want to discuss is polymorphism. Although we’ll expand the explanation as this section evolves, you can start by thinking of polymorphism as a design practice that allows you to use objects of different types in a uniform manner. For example, for our vehicle exercise, you might create classes for land-, water-, and air-based vehicles and write code to move each type of vehicle.

    pdf10p yukogaru13 30-11-2010 59 17   Download

  • The demand for QoS to ensure the quality of real-time services must take into account not only network parameters are static but dynamic. Therefore, the QoS measures need introduced in the network to the quality of real-time services can be ensured. the The most common construction of a routing problem in an optimal distribution network data based on a multicommodity flow optimization whereby a separate objective function minimized for all kinds of restricted flow multicommodity flow.

    pdf524p samsungwifi 03-04-2012 150 15   Download

  • The current text deals with several, very important topics of modern, Analytical Chemistry, such as analytical method validation in biotechnology today, principal component analysis, kinetic methods of analysis using potentiometric and spectrophotometric detectors, the current status of Analytical Chemistry and where it may move in the future, peptide and amino acid separations and identification, and several other, related topics in this growing and increasingly important area of Chemistry, in general.

    pdf154p camchuong_1 04-12-2012 36 13   Download

  • The main task in the independent component analysis (ICA) problem, formulated in Chapter 1, is to estimate a separating matrix that will give us the independent components. It also became clear that cannot generally be solved in closed form, that is, we cannot write it as some function of the sample or training set, whose value could be directly evaluated. Instead, the solution method is based on cost functions, also called objective functions or contrast functions. Solutions to ICA are found at the minima or maxima of these functions....

    pdf20p duongph05 09-06-2010 61 10   Download

  • The living organism which will be deeply affected are shredders, which feed on coarse sedimentary detritus, and collector-gatherers, which feed on fine sedimentary detritus, were the macroinvertebrate functional feeding groups are most adversely affected. Furthermore, during the industrial process, high amount of hydrofluoric acid (HF) are used to separate different sandy materials which are subsequently used for manufacturing glass at industrial plants. Therefore, high concentration of fluoride ion and suspended inorganic matter discharged by the industrial into the study site....

    pdf62p lulanphuong 28-03-2012 37 10   Download

  • This is the first volume of Advances in Nanoporous Materials, a new book series devoted to the science and application of all kinds of nanoporous solids. Its intention is to publish comprehensive reviews of lasting value in the field of nanoporous materials written by renowned experts. Its scope covers all aspects of nanoporous solids, including their preparation and structure, their post-synthetic modification, methods for their characterization as well as their application in catalysis and adsorption/separation....

    pdf323p xrzc1-1 16-09-2013 29 10   Download

  •  IUPAC Definition: chromatography is a physical method of separation in which the components to be separated are distributed between two phases, one of which is stationary while the other moves in a definite direction  Stationary phase (SP): common name for the column packing material in any type of chromatography  Mobile phase (MP): liquid media that continuously flows through the column and carries the analytes  Analyte: the chemical species being investigated (detected and quantitatively measured) by an analytical method...

    pdf19p qdung92ct 03-07-2012 37 9   Download

  • Nowadays, Chromatography is the most versatile and widespread technique employed in modern chemical analysis and plays a vital role in the advancement of chemistry, biology, medicine and related fields of research. Because of the inherent simplicity and ease of operation, it can be used together with a wide range of detection systems, including electrochemical, photometric and mass spectrometry, being an invaluable laboratory tool for the separation and identification of compounds.

    pdf438p camchuong_1 04-12-2012 23 8   Download

  • This revision brings the reader completely up to date on the evolving methods associated with increasingly more complex sample types analyzed using high-performance liquid chromatography, or HPLC. The book also incorporates updated discussions of many of the fundamental components of HPLC systems and practical issues associated with the use of this analytical method. This edition includes new or expanded treatments of sample preparation, computer assisted method development, as well as biochemical samples, and chiral separations....

    pdf542p doilan 26-01-2013 32 8   Download

  • This book is intended to present for the first time experimental methods to measure equilibria states of pure and mixed gases being adsorbed on the surface of solid materials. It has been written for engineers and scientists from industry and academia who are interested in adsorption based gas separation processes and/or in using gas adsorption for characterization of the porosity of solid materials

    pdf436p tuyetmuadong2013 06-04-2013 23 8   Download

Đồng bộ tài khoản