different contraceptive methods are used by breastfeeding mothers. in general, these methods are classified into two major groups, hormonal and non-hormonal. a number of studies have shown that combined oral contraceptive pills may adversely affect the quality and the quantity of human milk. in other studies it has been shown that estrogen and progesterone seem to reduce the risk of cardiac and...

to survive in natural waters, bacteria must respond to a variety of environmental variables such asstarvation. flexibacter chinensis was grown and multiplied in the starvation medium and its viable count, totalcount and cell size were investigated under different temperatures. also, the effects of different nutrientsources were investigated. the survival of the organism under starvation conditi...

breeding for environmental stress is one of the most important goals in plant breeding. among stresses, drought stress has high influencing on limitation of wheat production. so, in order to find the best drought tolerant genotypes, 24 genotypes were planted in three separate experiments in ardebil: one with optimum irrigation (control), another with water stress at pre-anthesis stage and the o...

abstract: evaluation of drought tolerance for 20 barley genotypes were conducted under normal irrigation and terminal stress condition by withholding irrigation at the time of 50% flowering. drought effect on grain yield and plant total mass traits was studied and eight of stress indices including stress tolerance index (sti), stress tolerance (tol), stress susceptibility index (ssi), mean prod...

in order to study of sodium nitroprusside(snp) application effect on growth indices and water use efficiency of kidney beans cultivars(akhtar and derakhshan) under water deficit stress, an experiment was conducted in split factorial based in randomized complete block design with three replications in bu-ali sina university research field at 2012. water stress treatments included vegetative stre...

mental stress and daily crises comprise a part of physical and mental threats. perceived stress is a physical and mental threat, as well. perceived stress is a psychological process during which the individual considers his/ her physical and psychological welfare as being threatened. since idiopathic thrombocytopenic purpura (itp) is one of the chronic diseases being able to affect patients' pe...

in order reaching to occurate water regime under minimum tillage system and its effect on the physiological indices of 3 rice cultivars an experiment  was conducted as a split-plot design based on  randomized complete block with three replication in the year of 2006-2007 at research field of shavour station. treatment contains three water regimes with one day or check, two (i2) and three days (...

abstract background: several studies have reported that medical sciences students are usually dealing with severe stress. however, no study is available on ways of coping in medical sciences students in iran. as socio‑cultural factors may affect the students’ responses toward stress, this study aimed to investigate the stressors and ways of coping among students of guilan university of medical ...

background: mental disorders have an important relationship with work conditions. excessive workload, laborers needs and expectations ignorance, harmful physical agents, noise, poor lightning and bad work atmosphere result increasing stress and job dissatisfaction in workers . methods: this descriptive-analytical survey implemented in order to investigate stress and job satisfaction rate of one...