Background: The present study aimed to evaluate the prevalence of substance abuse among students of selected schools of Tehran University of Medical Sciences, Iran.Methods: This was a cross-sectional study among students in five schools of Tehran University of Medical Sciences in 2014. Data collection was conducted using a questionnaire which was designed by the researcher. Questionnaires were ...

Background: Studies regarding cleansing the area with antiseptic solutions prior to catheterization in premature infants are limited. Therefore, the present study aimed to evaluate and compare the effects of chlorhexidine 2% and iodopovidone-alcohol solutions on bacterial colonization associated with the peripheral venous catheterization in premature infants. ...

Objective: This research aimed to predict suicidality and addiction (substance, alcohol, cigarette, psychoactive drugs) among university students based on Adverse Childhood Experiences (ACEs) and exposure to the suicide of family members and or friends. Methods: The research method was cross-sectional. The statistical community included all students of the University of Mohaghegh Ardabili, Ard...

  Background and Objectives: Alcohol consumption among various occupations' staff leads to many problems. Therefore, due to the importance of the issue, this comprehensive study was conducted to determine the prevalence of alcohol consumption among industrial workers.   Methods: In this descriptive cross-sectional study, the data were collected using a structured questionnaire through interv...

a series of transition metal complexes with two thiosemicarbazide schiff bases, 1-(4-dimethylaminobenzyl- idene)thiosemicarbazide (abtsc) and 1-(2-pyridincarboxyl-idene) thiosemicarbazide (tcts) were synthesized with co(ii), ni(ii), zn(ii), cd(ii) and ag(i) salts (chloride and acetate). these complexes were characterized by different methods including proton nuclear magnetic resonance (1hnmr), ...

the fact that the properties of a molecule are tightly connected to its structural  characteristics  is one of the fundamental concepts in chemistry. in this connection,  graph theory has been successfully applied in developing some relationships between topological indices and some thermodynamic properties. so ,  a novel method for computing the new descriptors to construct a quantitative rela...

we report the synthesized and preparation of graphene oxide (go) nanocomposite functionalized with polyvinyl alcohol (pva) with different concentration of graphene oxide 0, 1, 1.5, 2, 2.5, 3, 3.5 and 4% weight. this synthesized confirmed by ft-ir. the electrical conductivity of the all nanocomposite was measured at 25°c for all samples and the resulted showed electrical conductivity was increas...

background substance use among college students in iran is a serious problem. determining the pattern of substance use among university students is an important issue for implementing prevention and treatment programs. objectives the present survey attempts to determine the prevalence of substance usage and associated risk factors among the students of jahrom university of medical sciences and ...

the objective of this research was to compare the tensile, permeability, solubility and color properties of plasticized starch-polyvinyl alcohol-montmo-rillonite (ps-pva-mmt) and plasticized starch-polyvinyl alcohol-cellulose nanocrystal (ps-pva-ncc) bionanocomposite flms. the results showed that adding mmt (7%), increased the ultimate tensile strenght from 4.2 mpa to 4.61 mpa, however, ncc (7%...