Ionization & Precolumn @ Scien.net
Bad Honnef, Germany (PRWEB) December 07, 2012
The aim of the Natural Sciences Bibliographic Web Portal including its two new Ionization and Precolumn References sections is to provide comprehensive bibliographic information on the basic and applied life, earth and health sciences. While the publishers target to publish a total of over 21 million references until 2014, the site currently publishes about 5,000 new items every day. The basic information consists of basic bibliographic information while expanded references provide an additional summary of the publication's scientific content. Every bibliographic reference is tagged with up to twenty scientific keywords which cross-connects them beyond sections and categories.
The Chromatography Sciences Section contains scientific information on chromatography which is the collective term for a set of laboratory procedures used in the separation of mixtures. This separation is based on differential partitioning between the mobile phase and the stationary phase. Preparative chromatography is used to separate the components of a certain mixture in order to purify it. Analytical chromatography is done with relatively smaller amounts of the material, and is used for measuring the relative proportions of analytes in a specific mixture. The latest content in this category is also available through a Chromatography Sciences RSS feed. The section currently contains over 11,100 posts and is subdivided into the ten categories Acetonitrile, Cellulose, Florisil, HPLC, Ionization, Precolumn, Purification, Sepharose, Silicate, and Virus.
Within this section, the new category Ionization provides scientific information on the technique used in mass spectrometry processes in order to produce ions. Ionization is useful in producing ions from macromolecules, as it has the ability to overcome the propensity of macromolecules to fragment when they are undergoing ionization. Electrospray ionization (ESI) is also useful in the process of liquid chromatography mass spectrometry. ESI is the ion source of choice used with this type of chromatography. The analysis itself can be formed online through feeding the liquid eluting from the LC column directly to an electrospray. The category contains over 110 newly published posts of which the very latest inclusions are also available through an Ionization RSS feed. It features posts on quantitative analysis of triglyceride species of vegetable oils by high performance liquid chromatography via a flame ionization detector, and the influence of tryptophan loading on urinary excretion of anthranilic acid and 3-hydroxyanthranilic acid by men and women as determined by alkali flame ionization gas chromatography.
The new category Precolumn contains scientific information on column chromatography, which is used to purify a wide variety of individual chemical compounds from mixtures of the compounds. One of the main advantages of column chromatography is the disposability of the stationary phase used in the process, as well as the relatively low cost of the process itself. Column chromatography is also great for preventing the degradation of the stationary phase due to recycling. This category contains over 20 newly published posts of which the very latest inclusions are also available through a Precolumn RSS feed. It features posts on selective determination of secondary amino acids using precolumn derivatization with 9-fluorenylmethylchloroformate and reversed-phase high-performance liquid chromatography, and on high-performance liquid chromatography of plasma catecholamines using 1,2-diphenylethylenediamine as precolumn fluorescence derivatization reagent.
While the publishers of the web portal have a stock of 21,238,124 references of which 10,564,269 (50%) contain a summary, this information will be made successively available to the public until 2014. While the site has presently published a total of 1,294,000 posts online, the number of published bibliographic resources increases by 5,000 items every day. All items are interconnected with over 300,000 tags. The publishing status is reflected in the site's continuously updated tagline.