iranian crack is a new form of narcotic substance that has found widespread prevalence iniran in the past years. crack only nominally resembles crack cocaine as it is widely different inits clinical signs. thus the present study aims to quantify the chemical combination of this drug.the samples included 18 specimen of crack collected from different zones of tehran, iran.all specimens were in th...

Substance P, a member of the tachykinin family, is expressed in primary invasive malignant melanomas, metastatic melanomas, melanomas in situ, atypical naevi, and spindle and epithelioid cell naevi. The role of substance P in cancer development and progression is not clear. Radiotherapy, which is used extensively in the treatment of malignancies, alters substance P levels. It is, however, not k...

Iranian crack is a new form of narcotic substance that has found widespread prevalence inIran in the past years. crack only nominally resembles crack cocaine as it is widely different inits clinical signs. Thus the present study aims to quantify the chemical combination of this drug.The samples included 18 specimen of crack collected from different zones of Tehran, Iran.All specimens were in th...

BACKGROUND AND PURPOSE Cerebral vasospasm after subarachnoid hemorrhage may result partially from the imbalance between vasodilator and vasoconstrictor factors. The vasodilator peptides substance P and calcitonin gene-related peptide contained in the trigeminovascular system are involved in the vasomotor phenomenon occurring after subarachnoid hemorrhage. The delayed arterial narrowing may refl...

addiction is a phenomenon that causes structural changes in different systems of society. studies show for planning of addiction prevention and treatment, it is necessary to create an information management system. substance dependence information systems refer to systems which collect, analyse and report data related to substance dependence information. the aim of this study was to identify ad...

The actions of aqueous extracts of two pheochromocytomas are compared before and after the administration of the adrenergic blocking agent, Dibenamine. One tumor contained predominantly a substance which, like norepinephrine, had pressor actions after Dibenamine. The other tumor contained chiefly an epinephrine-like substance. The significance of the presence of norepine)hrine in pheochromocyto...