Tài liệu Speaking For IELTS (Collins Cobuild) part 1/4 pptx

Ngày tải lên: 26/02/2014, 12:20

Ngày tải lên: 14/12/2013, 22:15

... employed by researchers for analysis of nonpolar or neutral compounds, including particle beam and atmospheric pressure pho- toionization (APPI). 7.2.4.1 Particle Beam. Particle beam interface, ... micro-aggregates particles to the EI/CI source of a mass spectrometer.Typ- ically, the LC effluent is forced into a small nebulizer using a helium gas flow to form aerosol droplets. These uniform d...

Ngày tải lên: 15/12/2013, 12:15

... metabolites are important biotransformation pathways for many drugs and xenobiotics [127, 132, 133]. For example, the formation of acyl glucuronide conjugate forced the withdrawal of four marketed ... intermediates for formation of the keto acid, were also observed in the radiochromatogram of rat plasma (spectrum not shown) [131]. PRACTICAL APPLICATIONS 335 Scheme 11. Mechanism for th...

Ngày tải lên: 15/12/2013, 12:15

Ngày tải lên: 24/12/2013, 08:15

... uniform flow inside and around the parti- cles. From Figure 2-2 it is obvious that the smaller the particles, the lower the theoretical plate height and the higher the efficiency. The general form ... solution of equation (2-33) could be obtained using two clas- sical relationships for partial derivatives [for simple forms of the distribution function y(c)] (2-34) (2-35) Substitution of equa...

Ngày tải lên: 24/12/2013, 18:15

... since the polymer solubility in that particular solvent needs to be considered. Tetrahydrofuran is the most common solvent used for most GPC separations, although for polyimids and other high-temperature polymers ... encountered in reversed-phase chromatography applications for example, if the area% does not agree with the assay% value for pharmaceutical analysis of a particular activ...

Ngày tải lên: 24/12/2013, 18:15

... support for qualifying the pro- posed LOQ as the official LOQ for the method. 9.4.3.1 Linearity Example (Assay and Content Uniformity). An example for linearity for Assay and Content Uniformity ... 8000 rpm for 10 seconds each Six pulses at 15,000 rpm for 15 seconds each Soak/settle time for 2 minutes (to allow all particles to settle to the bottom of the vessel, which allowed f...

Ngày tải lên: 24/12/2013, 18:15

... of, before anterior (placed before), antedate (to proceed in time, come before) anti-, ant-: opposite, opposing, against antibiotic (substance that kills microorganisms), antidote (remedy for counter- acting ... that describes (an adjective or adverb). HERE’S A HINT PARTS OF SPEECH The following table offers a quick reference guide for the main parts of speech. Part of Speech Function...

Ngày tải lên: 21/01/2014, 04:20