objective: field experiment was conducted in 2009 to investigate the effects of plant density and weed interference on morphological characteristics and yield of corn (zea mays, l.) at research station of university of tabriz, tabriz, iran. methods: the experiment was arranged as split plot based on randomized complete block design with three replications. plant density (d1, d2, d3 and d4: 5, 7...

objective(s): vinblastine is antimitotic, anticancer medicine that disturbs normal microtubule formation and favours depolymerisation. structural study and finding the active site of vinblastine are the targets of this research.   materials and methods: vinblastine was optimized in vacuum and then in different solvents by density functional theory (dft) method. nuclear magnetic resonance (nmr) ...

in order to study the effects of sugar cane harvest machinery traffic on bulk density and cone index variation, a survey was conducted in 10 farms of deabel khozaiee sugarcane agro-industrial company, ahvaz, in 2006. in this experiment, two types of harvesters including wheel half track and tire wheels with 14 tons of weight, versus two types of tractor and basket transporters, with 10 and 18 t...

in this study, we present the work on the physicochemical interaction between the anti-cancer alkaloidberberine (brb) and dna with the purpose of designing drugs that interact more with dna. molecularmodeling on the complex formed between berberine and dna presented that this complex was undeniablyfully able of participating in the formation of a stable intercalation site. besides, the molecula...

in this research, we report the results of dft calculations using xc-hybrid functional, b3lyp and employ nbo interpretation to investigate the stereoelectronic effects. electrostatic and steric impacts on the conformational properties of 1,2-difluorodiazene (1), 1,2-dichlorodiazene (2) and 1,2-dibromodiazene (3) are also studied. factors determining the thermodynamically stable molecular struct...

this study was aimed to investigate the use of panoramic radiography in patients with low bone mineral density (bmd) in order to diagnose and prevent osteoporotic fractures. panoramic radiographs of 60 patients  (20 men and 40 women) aged from 40 to 70 years with cortical thicknesses of less than 3 mm in the mandibular angle were selected from patients referred to a dentomaxillofacial radiology...

viscosity (µ) and density (ρ) are important physical roperties for analysis of membrane processes performance and for designing a new membrane process. in addition, the energy requirement for fluid pumping is depend on these two physical properties magnitiude. in this study, firstly, the effects of different process factors such as transmembrane pressure (51, 101, 152, 203 and 253 kpa), tempera...

abstract in order to study the effect of planting season (autumn and spring) and plant density on growth traits and flower yield (dry weight of flower) of matricaria (matricaria chamomilla), an experiment was carried out at the research field of agricultural faculty of shirvan, affiliated to ferdowsi university of mashhad. a split plot design with two factors, including planting time and plant ...

although there exist advanced models which predict beach profile for natural beaches, the behavior of the beaches in front of seawalls still suffers from the lack of appropriate theoretical models and sufficient measured data. in this paper, following the results obtained from the measurements, a beach profile evolution model is developed, using the measured probability distribution of the near...

background: little is known about the effects of a low energy dense diet on weight maintenance and cardiovascular risks following a recent weight reduction. therefore, we assessed if weight maintenance, lipid profiles and glycemic control differ between low energy density diet and usual diet consumers following a recent weight reduction. method s: seventy patients with the history of weight red...