An ultrasensitive measuring method of biological materials.
نویسندگان
چکیده
منابع مشابه
An Ultrasensitive Vibrating Probe for Measuring Steady Extracellular Currents
We describe a vibrating probe system for measuring relatively steady electrical current densities near individual living cells. It has a signal-to-noise ratio at least 100 times greater than previously available techniques. Thus it can be used to detect current densities as small as 10 nA/cm(2) in serum when a 30-microm diameter probe is vibrated at 200 Hz between two points 30 microm apart, an...
متن کاملA new method of measuring plastic limit of fine materials
Index properties such as the liquid limit and plastic limit are widely used to evaluate certain geotechnical parameters of fine-grained soils. Measurement of the liquid limit is a mechanical process, and the possibility of errors occurring during measurement is not significant. However, this is not the case for plastic limit testing, despite the fact that the current method of measurement is em...
متن کاملA Method of Measuring Emission Spectra from Thermoluminescent Materials
It is always difficult to measure the emission spectrum of a thermoluminescent material, because the emission is transient, of low intensity, and the spectrum may change from one glow curve to another. Methods used in the past have involved making extremely fast spectral scans 1 , or heating multiple samples and recording a single wavelength band for each sample. 2 The second method is very tim...
متن کاملA Volumetric Method for Determination of Potassium in Biological Materials
During the past 3 years we have carried out analyses of tissues for potassium in this laboratory using the separation by chloroplatinic acid. For 1 year potassium has been estimated by a Volhard titration of the chlorine in KzPtC16 separated by the usual procedure. Because the method seems more accurate and convenient than previous titrimetric methods, a description is warranted. SolulionsSolut...
متن کاملA method for the measurement of radioiodine in biological materials.
For the purpose of biochemical studies utilizing radioiodine 1131 as a tracer material, it is desirable to have a simple, sensitive, and thoroughly validated method for the measurement of the radioactivity of the biological samples. The present investigation was undertaken to provide such a method, with part,icular reference to the thyroid of the rat, but is adaptable with appropriate modificat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Kagaku To Seibutsu
سال: 1990
ISSN: 0453-073X,1883-6852
DOI: 10.1271/kagakutoseibutsu1962.28.332