Exercises in Quantitative Chemical Analysis
نویسندگان
چکیده
منابع مشابه
In vitro quantitative chemical analysis of tattoo pigments.
BACKGROUND The composition of cosmetic tattoos might prove relevant to their treatment by high-powered lasers. OBJECTIVES To test the accuracy and completeness of information supplied by the tattoo ink manufacturers and to perform an elemental assay of tattoo pigments using scanning electron microscopy with energy-dispersive x-ray analysis. DESIGN Samples of 30 tattoo inks were examined usi...
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اندیشمندان و صاحب نظران علوم اجتماعی بر این باورند که مرحله تازه ای در تاریخ جوامع بشری اغاز شده است. ویژگیهای این جامعه نو را می توان پدیده هایی از جمله اقتصاد اطلاعاتی جهانی ، هندسه متغیر شبکه ای، فرهنگ مجاز واقعی ، توسعه حیرت انگیز فناوری های دیجیتال، خدمات پیوسته و نیز فشردگی زمان و مکان برشمرد. از سوی دیگر قدرت به عنوان موضوع اصلی علم سیاست جایگاه مهمی در روابط انسانی دارد، قدرت و بازتولید...
15 صفحه اولQuantitative physico-chemical analysis of the acidosis of cardiac arrest
Metabolic acidosis is a common finding after cardiac arrest. Until recently this acidosis was mainly attributed to lactate. The physico-chemical approach to acid-base balance permits the detection of previously unmeasured ions. These ions have been shown to affect the acid-base status of patients.
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Pulsed gradient spin echo NMR coupled with a data processing approach such as direct exponential curve resolution algorithm may be used to resolve individual components in a mixture. Differences in the diffusivities of the components lead to differences in their signal decay behavior in the experiment and allow for pure component spectra to be resolved. Because the experiment is echo-based, dif...
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Abstract. Chemical organisation theory is a framework developed to simplify the analysis of long-term behaviour of chemical systems. An organisation is a set of objects which are closed and self-maintaining. In this paper, we build on these ideas to develop novel techniques for formal quantitative analysis of chemical reaction networks, using discrete stochastic models represented as continuous...
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ژورنال
عنوان ژورنال: Nature
سال: 1887
ISSN: 0028-0836,1476-4687
DOI: 10.1038/037174a0