abstract: chitosan is a natural antimicrobial which is derived from non-toxic animal resources. this study investigated and compared the antimicrobial characteristics of chitosan which was extracted from shell of artemia cyst in the lake of urmia with the same commercial chitosan feature to that of crab shell from a.p.t firm in vietnam. the experiment was carried by means of two fulded method t...

the aim of the present study is to assess the effect of pure and mixed plantations of eastern cottonwood (populus deltoides) and alder (alnus subcordata) on quantitative stand characteristics and soil properties. the experiment was established in 1994 using randomized block design with five treatments (1- p100%, 2- p67%-a33%, 3- p50%-a50%, 4- p33%-a67%, and 5- a100%) and four replicates in cham...

the purpose of this study is evaluation and improvement of production functions to estimate alfalfa yields under different deficit irrigations conditions and determination of “production of yield - water use” in qazvin plain. this investigation was applied by factorial experiment in a randomized complete block design with four water treatments including e4, e3, e2, and e1, respectively, equal t...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 background: one of the major steps for planning and making polices in iranian health and health service sector is to gain information on the condition of such services in each province. thus, the present study intended to determine the degree of development and ranking of provinces at this sector. it can identify the undev...

background: h e r2/ n eu i so n e o ftheepi de rmalg r owth f actor r e c e pt o rsfami l i e s andsee m stohaveprognosticsignificanceofsomesolid t umors.theo b jecti v eof thisstu d yistoevaluatet h epossi b ilityofher2ex p ressioningastricca n cersand the p o s si b le r e lat i o n ship o fh e r2withtumo r ’scli n icopat h o l o gicpara m e te r sa n d a l s oits pr o gno s tic r o l e .   m...

normal 0 false false false en-us x-none ar-sa background: exposure to some environmental agent such as different nutrition and contact with allergens may have a role in developing multiple sclerosis (ms). the present study was aimed to evaluate the cow’s milk allergy (cma) in ms patients compared to healthy controls. materials and methods: between march 2012 and july 2012, 48 ms patients were s...

drought tolerance of three own-rooted grape cultivars (rashe, ghezil uzum and red sultanina) was evaluated at four different levels of soil moisture contents (40, 60, 80 and 100% field capacity through a factorial experiment based on a randomized complete block design with three replications for a duration of 3 months. results revealed that, grape cultivars, levels of soil moisture and the inte...

drought is the most common environmental stresses that affects plant growth. to study the combined effects of arbuscular mycorrhizal fungi (glomus intratadices) and jasmonic acid on growth and ecophysiologycal characteristics of pistachio seedlings cv. qazvini under drought stress, a greenhouse experiment was conducted in a completely randomized design with three replications. experimental fact...

rainfall and flow rate are of the most important climatic and hydrologic parameters whose investigation and determination of their behavior are of great importance in water resources management. one of the most suitable methods available for assessment of hydro-climatological conditions in the watershed is trend analysis which is used to examine the changes of a variable during time. current st...

forest cover is one of the most effective factors in reducing flooding in northern iran, so that in recent years the destruction, land use changing and uncontrolled harvesting of forest areas, has greatly increased the number and magnitude of floods. so far, there have been few studies on forest hydrology in iran, particularly the northern hyrcanian forests. this study examines the impact of a ...