نتایج جستجو برای: natural and environmental factors
تعداد نتایج: 17026039 فیلتر نتایج به سال:
lawsone a natural pigment present in the henna leaves has been used as a skin and hair dye since 1400 bc. the concentration of this natural compound in leaves varies from place to place depending upon many of the environmental factors and the highest quantity reported so far is about 1% of the dry mass. heretofore, it has been reported that natural colored extracts and isolate from henna leaves...
for several years, researchers in familiarity of efl teachers with post-method and its role in second and foreign language learners’ productions have pointed out that the opportunity to plan for a task generally develops language learners’ development (ellis, 2005). it is important to mention that the critical varies in language teaching was shown is the disappearances of the concept of method ...
Purpose: Based on the importance of crisis management in broad natural events because of: wide range of impacts and its potential for severe damages, this article provided an indigenous model for disaster management in natural disasters. Method: The method used in this study is grounded theory. To design the model, 18 semi-structured in-depth interviews were conducted with a sample of academic ...
Background: The humans’ greed, the productivity of natural resources, the sense of jobbery, and capitalists and producers’ avarice, are some threats to the natural resources. Therefore, the environmental issue has been considered by many scholars. The issue of environmental ethics has been raised in order to solve these problems by the experts. Hence, the present article aimed to highlight the ...
The awareness of environmental, economic and sociological problems is rising. The purpose of such an approach is to reconcile industrial development with environmental capacities. This approach to environmental protection dates back to the time when the devastation of environment brought on by human factor, the intensification of production process and a build-up of harmful pollutants first bec...
this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...
to survive in natural waters, bacteria must respond to variety of environmental factors. flexibacter survival in the aquatic environment is influenced by number of parameters, such as temperature, heavy metal concentration and oxidation. here we investigate the influence of these factors on the survival of flexibacter chinensis in starvation medium. our data shows that different concentrations ...
background and aim: relationship is an essential aspect of human life. during the course of illnesses and hospitalization, student-patient relationship significantly contributes to patient satisfaction and nursing care quality. the objective of the present study was to identify the factors affecting student-patient relationship from the perspectives of patients. materials and methods: this desc...
Ecological destruction in human-dominated landscapes has significant impacts on environment sustainability internationally. Landscape planning can play a role in mitigating the effects of human-related activities. One element of landscape planning involves the analysis of the biological, spatial and social arrangement of areas in an urban environment and identifying characteristics that are und...
background: the association between the prevalence of multiple sclerosis (ms) and latitude gradient indicates the importance of environmental factors in ms susceptibility. sunlight’s ultraviolet radiation, its ability to influence melatonin, and an imbalance of melatonin in the central nervous system (cns) may be involved in this process. methods: this case‑control study was conducted in isfaha...
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