With the development of the technique of radioimmunoassay and its application to peptides of low molecular weight, measurement of the concentration of angiotensin I and I1 in blood has become possible. Numerous immunoassays for determining the circulating levels of the octapeptide angiotensin I1 have been developed in recent years (Boyd, Landon & Peart, 1967; Catt, Cain & Coghlan, 1967; Vallott...

A radioimmunoassay procedure was developed for determining smallpox and vaccinia antibodies in human sera. The test detected and measured both primary and secondary immune responses in persons infected with variola virus or vaccinia virus. The antibody titers obtained by complement fixation, hemagglutination inhibition, plaque reduction neutralization, and radioimmunoassay methods were compared...

the precise pharmacological of chronic use of opium on serum level of gonadotropins and male sex hormones are not studied extensively.this study was performed to investigate the changes in these parameters is opium addicted men.the blood samples of 46 opium addicts and 39 normal men were taken ,and the testosterone ,LH and FSH levels in serum were measured by radioimmunoassay (RID) technique us...

A radioimmunoassay specific for the amino (N) terminal portion of the parathyroid hormone (PTH) molecule (N-PTH radioimmunoassay) has been developed by iodinating synthetic 1-34bovine PTH (1-34bPTH) and using commercially available bPTH antiserum. A radioimmunoassay specific for the carboxyl (C) terminal (C-PTH radioimmunoassay) has been carried out by adding enough amount of 1-34bPTH to the PT...

background: stimulants addition and abuse can cause some functional and morphological changes in the normal function of glands and hormones. methamphetamine as an addictive stimulant drug affects the hypothalamic-pituitary-adrenal (hpa) axis and consequently makes some changes in the psychological state of the drug users. the present study aims to examine the relationship between plasma levels ...

recognized as a reliable tool for assessing the hypothalamus-pituitary-adrenal (hpa) axis, measurement of salivary cortisol plays an important role in both the clinical and research settings. to establish a normative data, which forms the basis for the usage of this valuable parameter, we gathered 8:00 h saliva samples from 94 healthy individuals aged 6-14 years. cortisol levels were measured b...

A phytochrome radioimmunoassay with a detection limit of about 2 nanograms has been developed. The radioimmunoassay does not suffer from the potential drawbacks of the commonly used spectral assay and requires less than 1 microliter of crude extract from dark-grown plants for quantitation of phytochrome. Measurement of phytochrome in crude extracts by radioimmunoassay gives values about 25% gre...

<abstract> <p>Radioactive liquid wastes are produced at hospitals from diagnostic and therapeutic applications of radionuclides. The most usual management these is temporary storage the hospital for radioactivity decay and, then, discharge into sewage if not other pollutants present in waste, always after authorization corresponding institution. In some cases, radioactive have hazar...