in this work, zncao2 (zinc oxide-calcium oxide) nanocomposite were synthesized at different temperatures (500-700°c) by sol-gel method based on polymeric network of polyvinyl alcohol (pva). the synthesized samples were characterized by sem/edax, ft-ir and xrd techniques. it was found that synthesized nanocomposites have 1.62, 2.05 and 13.91%wt of cao, respectively. the obtained results show tha...

most of the systematic studies used in the development of human embryo culture media have been done first on mouse embryos. the general use of nmri outbred mice is a model for toxicology, teratology and pharmacology. nmri mouse embryo exhibit the two-cell block in vitro. the objective of this study was to evaluate and compare the effects of four kinds of culture media on the development of zygo...

normal 0 false false false en-us x-none ar-sa background: stroke is one of the most common causes of disabilities and death all over the world. the mortality rate of stroke is predicted to be doubled by 2030 in the middle east countries. nutrition is an effective strategy in prevention and management of stroke. this study assessed the relationship between various protein types and stroke risk. ...

palm date leaves were processed with lime in a processing reactor in a factorial arrangement of treatments (3 × 3) with 3 levels of temperatures (40, 80 and 100°c) and time periods (80, 160, and 240 minutes) in a completely randomized design. fermentation parameters measured using gas production technique. with increasing pretreatment time and temperature lignin content reduced from 13.0 percen...

the experiment was aimed to study the chemical constituents of essential oils from two pimpinella l. species including p. deverroides - boiss, and p. tragium vill. growing wild in iran. to do this, the essential oil of fruits of two p. tragium populations (sefidkhani and hesar, markazi province, iran) and one population of p. deverroides (kerend, kermanshah province) were extracted by a cleveng...

achillea millefolium belong to the asteraceae family and from genus achillea. in this study essential oils were extracted from all aerial parts via hydro distillation (hd) method by clevenger set . by using of gas chromatography/mass spectrometry ( gc-ms) technique the chemicals component essential oil were identified. about 41 components with were identified which encompassed 97.66 percent of ...

bisphenol-a (bpa) is an industrial xenoestrogen used widely in our living environment. recently, several studies suggested that bpa has destructive effects on dna and chromosomes in normal body cells via estrogen receptors (er). therefore, bpa could be considered as an important mediator in many diseases such as cancer. however, there are still many controversial issues which need clarification...

the goal of this article is mapping urban management science. the main question of the research is “what are the subject areas of urban management science and how is the relation between these subject areas?” the map of urban management science can help to recognize urban management and its subject areas and can help policy makers to get familiar with the priorities in this subject area. for th...

precise application of the n fertilizer rate is critical to achieve maximum yield. in major regions, empirical methods were used for determining n fertilizer requirement. these methods cannot take into account variation in management and environmental conditions on determining fertilizer requirement. crop simulation models can provide an alternative means of determining the optimum crop n requi...