منابع مشابه
Hoar-crystal Method for Ice Fabrics
A new method has been developed for the observation of crystal axes orientation in fine -grained polycrystalline ice (grain-size approx imately one millimetre). A two per cent ethylene dichloride solution of polyvinyl formal (Formvar) is applied to the surface of a sample. This solution prod uces adequate density of small holes in the Formvar coating and subsequently the nucleatio n sites for h...
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متن کاملAn improved flame-photometric method for determining calcium in serum.
Powell (1953) introduced a method for the estimation of serum calcium using the EEL flame photometer, and claimed that it gave results in good agreement with a standard titrimetric procedure. In this laboratory, both these methods were found to give low results when tested against standard sera, prepared by adding known amounts of calcium to serum completely decalcified by treatment with a cati...
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Accurate estimating is one of the most important activities in the field of software project management. Different aspects of software projects must be estimated among which time and effort are of significant importance to efficient project planning. Due to complexity of software projects and lack of information at the early stages of project, reliable effort estimation is a challenging issue. ...
متن کاملAn improved HPLC method for determination of colocynthin in colocynth
Background and objectives: Colocynthin is the major active secondary metabolite of colocynth, Citrullus colocynthis (L.) Schrad, which has been used in traditional and ethno medicine of many countries. It could be considered as an active marker for quality control of colocynth and its herbal products. Analysis and standardization of colocynth and its herbal preparations are a critical...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1971
ISSN: 0022-1430,1727-5652
DOI: 10.3189/s0022143000013071