Specifications, preparation

Certain laboratories can, after a contract has been awarded, register under the Contract Laboratory Program (CLP) of the EPA. To earn a contract, one or more specifically prepared samples must be analyzed under very similar conditions to those used in standard protocols. Only if the data are deemed satisfactory will a contract be awarded. Further evaluation samples must be analyzed at three-month intervals afterward to ensure that performance is being maintained. [Pg.296]

Specifically prepared low DE starch products in the maltodextrin class, especially those from tapioca and potato starches, mimic a fatty mouthfeel and are used as fat replacers and/or sparers (see Eat replacers). [Pg.483]

For calibration of the 0 to 100% LEL scale, test kits containing known concentrations of combustible gases (usually either 2.5% methane or 2.5% natural gas) are available from the instrument manufacturers. In using these kits, it should be borne in mind that the calibration is only for that sjiecific gas and indicates only that the meter is operational on the 0 to 100% LEL scale. To calibrate to 0 to 10% scale, it is necessary to use purchased or specifically prepared known concentrations of gases in the TLV ranges. [Pg.273]

A commercial pectinase, immobilised on appropriately functionalised y-alumina spheres, was loaded in a packed bed reactor and employed to depolymerise the pectin contained in a model solution and in the apple juice. The activity of the immobilized enzyme was tested in several batch reactions and compared with the one of the free enzyme. A successful apple juice depectinisation was obtained using the pectinase immobilised system. In addition, an endopolygalacturonase from Kluyveromyces marxianus, previously purified in a single-step process with coreshell microspheres specifically prepared, was immobilised on the same active support and the efficiency of the resulting catalyst was tested. [Pg.971]

The basic technology for the preparation of sample material is similar in all TLC preparations, irrespective of the origin of the hpid and specific preparation method for a variety of biological samples [43]. The most important factor is the solubihty of the sample. The lipid sample must be completely soluble in the dissolving solvent prior to the application and must be free from water. Either toluene or chloroform is commonly used as the solvent to dissolve hpid materials. The dissolving solvent should be nonpolar in namre and volatile at such a concentration that the hpid components in the sample are completely adsorbed throughout the entire thickness of the layer as quickly as possible. Although sample sizes as small as 1 to 10 pi can... [Pg.306]

St. John s wort This herbal remedy may induce CYP3A4 the certainty of an interaction probably rests on the specific preparation being used, but caution would dictate that this herbal product should be avoided in those receiving methadone treatment withdrawal symptoms have been noted in patients taking methadone maintenance who have added St. John s wort to their drug regimen. [Pg.535]

The advantage of iterative strategies is based on the specific preparation of well defined structures and structurally perfect spacers of nanometer scale. This stepwise approach yields monodisperse material in contrast to other statistical routes. The use of the same reactants and the conversion of the same functional groups facilitates the synthetic effort compared with non-iterative methods. [Pg.25]

Preparation and Properties of Barium Salt. The catalyst used to prepare this new class of crystallizing polybutadienes consists of a barium t-butoxide-hydroxide salt in combination with an organolithium ( 8, 9, 10). Rather specific preparative techniques must be used in forming this barium salt, as shown in Figure 1. The use of an amine solvent provided quantitative conversion of the metal to barium salts. [Pg.76]

SIMS is one of the only mass spectrometric techniques that allow solid samples to be analysed without any extraction of compounds or matrix addition. Generally, no specific preparation technique is required, and solid samples can directly be analysed if they are small enough to be fixed on the sample holder. In most cases, this means that the sample size must not be more than 1 cm. [Pg.436]

Davis, P.D., and Crapps, E.C. (2006) Selective and specific preparation of discrete PEG compounds. US Patent Application Publication No. 2006/0020134. [Pg.1058]

In addition to the above-mentioned methods, more specific preparations, described below, are also used. [Pg.513]

Several new sections have been added to this Second Edition, and the presentations of the established methods have been updated to emphasize the recent advances in their use. In addition to the survey of the approaches toward carbon-phosphorus bond formation, details of specific preparations are provided as guides for the performance of these reactions without detailed recourse to the original literature. In this way, this work is anticipated to be of particular value to the synthetic organic chemist who is skilled in the general art but not particularly experienced in organophosphorus chemistry. [Pg.4]

Consequently, the stabilization of the optical carbon by virtue of the conjugation to respective protein might improve upon the status of the specificity to a considerable extent. In order to prove the validity of this phenomenon one may carry out a definitive methodology whereby a closely monitored and controlled study of the antisera obtained by conjugates specifically prepared at the asymmetric-carbon and at another-site are both compared simultaneously under identical experimental parameters. [Pg.504]

These beyond-use date limits may be exceeded when there is supporting valid scientific stability information that is directly applicable to the specific preparation (i.e., the same drug concentration range, pH, excipients, vehicle, water content, etc.)... [Pg.391]

Pharmaceutics, pharmaceutical manufacturing, and pharmaceutical compounding share a symbiotic relationship to provide quality pharmaceuticals to patients. Manufacturers can most efficiently provide quality products on a large scale to the masses and pharmaceutical compounding can provide specific preparations for individual patients. [Pg.399]

An alternative or additional step to flame annealing is electrochemical or chemical polishing. The fundamental aspects of electropolishing were reviewed recently [185], and a list of polishing procedures and parameters is available [185,186]. This method has been successfully applied to the preparation of gold, silver, and copper electrodes for STM studies [177,180,188]. It is important to note that different mesoscopic structures may arise according to the specific preparation procedures. For example, electropolishing a mechanically prepared Au(lOO) surface followed by... [Pg.251]

In addition to the requirements of NFPA 11, the following, where applicable, should be included in the specification prepared for purchasing foam equipment and systems ... [Pg.213]

Alternatively, specific preparation techniques (such as chemical vapor deposition [150] or the production of embedded Rh/AbOj catalysts [155]) have been developed to reduce surface heterogeneity and the related C-forming rate and guarantee stable and evenly distributed Rh particles. [Pg.386]

The aqueous solution are most quickly absorbed. But due to their poor stability, solubility limitation and packaging problems, most of the drugs are not designed in aqueous solution unless unavoidably needed in some specific preparations. [Pg.28]

One issue that is particularly interesting for activated dissociation is the importance of translational vs. vibrational activation since this relates to the topology of the barrier location on the PES (see Section 2.3.1). In analyzing experiments, it has been traditional to define the vibrational efficacy rjv as in eq. (2.5). This analysis, however, assumes that A(v) is the same for all v and this may not be universally true. In this case, describing vibrational efficacy is more complicated. Very recently, experiments for CH4 dissociation on transition metals even combine supersonic nozzle molecular beams with laser state preparation techniques to probe the reactivity of specifically prepared vibration rotation states [115-118] (see Section 4.3.1.3). [Pg.179]

Basic information concerning the mechanism of skeletal rearrangement was provided by labeling experiments and kinetic studies. The use of specifically prepared catalysts, such as metal films and alloys, and structure sensitivity studies supplied additional data. The information resulted in establishing two basic processes the bond shift and the cyclic mechanisms.151-154... [Pg.182]

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