List of Articles physical characteristic

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  1 - Identification of causes of the occurrence of Gully erosion with emphasis on soil-related factors (case study: Agh Imam watershed)
  maryam mohamadebrahimi
  Gully erosion in one of the different types of soil erosion by water that initiation and advancement of it can tend to the great changes on landscape and degrades the lands. The objective of the current study is to analyze the effects of soil-related factors on the occu More

  Gully erosion in one of the different types of soil erosion by water that initiation and advancement of it can tend to the great changes on landscape and degrades the lands. The objective of the current study is to analyze the effects of soil-related factors on the occurrence of Gully erosion in the Age Imam watershed.  This watershed, with an area of 5442.45 hectares, is located in the east of Golestan province, and experiences many substantial difficulties due to Gully erosion.  In this study, ditches in the region were identified through field study. Then five ditches were selected and 10 soil samples from the within the ditch and 10 from outside the ditch were taken (a region in the adjacent area above the ditches), from two depths (0-30 cm, and 30-60 cm) and were subjected to laboratory analysis.  The comparison of  the averages of the two statistical populations was used to analyze the physical and chemical characteristics of soil taken from two depths,  Results showed that significant differences existed (on a 5% level) among some soil characteristics between surface soil and the soil below that, as: Percentage of Silt (at both depths, taken from the ditch), percentage of saturation humidity (at both depths, taken from the ditch), electric conductivity (at the lower depth, taken from the ditch), neutralizing substances (at both depths, taken from outside the ditches), cation exchange percentage (lower depth, taken from outside the ditch), sodium absorption ratio (lower depth, taken from the ditches), and the percentage of exchange sodium (at the lower depth, taken from the ditches), had an effective role in Gully erosion, due to the higher amounts and statistical significances. Manuscript profile
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  2 - Amount damage of Lesser grain borer on Viability and physical characteristics of seed whatw varietis in laboratory candition in Golestan
  Kabir Eyidozehi Sultan Ravan Abbas Khani Soleiman Khormali
  Lesser grain boror Rhizoperta dominica in widly distributed in the world wide. Its caused damage to stored product pests, specially on wheat. Damage of this pests, terminating to decrease seed weight and Viability The averege of damage and feeding rate of above pest was More

  Lesser grain boror Rhizoperta dominica in widly distributed in the world wide. Its caused damage to stored product pests, specially on wheat. Damage of this pests, terminating to decrease seed weight and Viability The averege of damage and feeding rate of above pest was studied with eight lines and cultivar such as: Kouhdasht, Zagros, Morvarid, Darya, Pastor, Line 17 and N-80-19. Experiment was down as randomly complete black design with explications in laboratory canditions. A hundred grams of wheat plased in a crystal container and with 10 adult ware put on each container and them, bottle door will cover with net. seed weight, Viability Pure varietis in two stage, before pests at end to meas used expsmate. Analysis of variances has been shown  all characteristics of  wheat varietis todamege and feeding of Lesser grain boror wese not signiticant differences. comparison average of varieties of wheat Viability and seed weight before experimant, has not shown signiticant differences, but effect to feeding and damege of Lesser grain boror to Viability and wheat varietis has been decrease of except Morvarid variety. Morvarid variety least decrease Viability (10.34). and decrease un purity of seed (12.84) and less percantage decrease seed weight (13.07). Morvarid variety with weight of hectoliters (66.50). Darya variety with more percentage decrease weight (21.97) and more percentage decrease un purity was (21.94),but with more weight Hectoliter (67.32) after experimant and more percantage of decrease of Viability (27.33) belong to pastoor variety. These bore, feeding and damage of  Lesser grain boror ,these was lesse effect on Viability and physical characteristics ofMorvarid seed variety and resistance (possible used that in programm of IPM) Darya varietys and Pastor was more effect feeding  of  pests, and it was  mor on resistance variety in between other varietys  has been investigcated. Manuscript profile
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  3 - Meta-study of environmental-physical characteristics of a healthy city in Iranian cities; In the period of 1390-1399 .
  hamide shaebani rabori korosh afzali fateme khozai ravari
  Explanation of the topic: Following the excessive growth and expansion of cities, several approaches were proposed to ensure a favorable living situation for today and future generations, and one of these important approaches is the healthy city approach. The aim of the More

  Explanation of the topic: Following the excessive growth and expansion of cities, several approaches were proposed to ensure a favorable living situation for today and future generations, and one of these important approaches is the healthy city approach. The aim of the current research is to evaluate the environmental-physical indicators of a healthy city in Iranian cities. Method: The current research is a fundamental research from the point of view of the goal, quantitative in terms of method and descriptive-analytical in nature with meta-analysis method. In order to do the work, secondary data has been used and the type of model is the model with random effects. SPSS and CMA2 software were used to analyze the data. Findings: The findings show that in the mental studies group, all studies were significant and the estimation of the impact of all studies was also significant. Regarding the objective studies, 4 out of 10 studies were completely meaningless, but all the studies were significant. In the group of indicators, 29 indicators were subjective and 30 were objective indicators, and among the subjective indicators, 19 indicators were statistically significant, and among the objective indicators, 18 indicators were found to be meaningless. Results: The main results of the meta-analysis showed that the highest impact factor related to the "air quality" index, the highest confidence interval related to the "waste collection system quality" index, and the highest analysis power regarding the city of Salem is that of the "special cycling route". Manuscript profile
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  4 - Chemical synthesis and characterization of Zn-doped cadmium oxide based nanoparticles: As nanofluids for thermophysical applications
  M Sheela Pauline W A Samson Nesaraj
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  5 - Chemical Composition, Physical Characteristics, Rumen Degradability of NDF and NDF Fractionation in Rice Straw as an Effective Fibre in Ruminants
  A. Teimouri Yansari
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  6 - بررسی کیفیت پوست و ویژگی‎های فیزیکی چرم براساس سن، جنس و محل قرار‌ گرفتن در بدن در بزهای پرورش داده‌شده در مناطق نیمه‌مرطوب و مرتفع
  م. صالحی ا. لواف ط. فرهوش
  برای بررسی ویژگی‎های پوست و چرم بزهای موئی با توجه به سن و جنس آنها، تعداد 120 پوست بز از بخش غربی ایران انتخاب شدند. نتایج نشان دهنده معنی‌دار بودن سن و جنس بر وزن و مساحت پوست و چرم بود. علاوه بر این، سن و جنس، اثرات معنی‎داری برروی ضخامت چرم و پوست در نواحی م More

  برای بررسی ویژگی‎های پوست و چرم بزهای موئی با توجه به سن و جنس آنها، تعداد 120 پوست بز از بخش غربی ایران انتخاب شدند. نتایج نشان دهنده معنی‌دار بودن سن و جنس بر وزن و مساحت پوست و چرم بود. علاوه بر این، سن و جنس، اثرات معنی‎داری برروی ضخامت چرم و پوست در نواحی مختلف بدن به جز شکم داشتند. متوسط ​​وزن کل پوست و چرم به ترتیب 9/27 ± 8/1074 و 9/25 ± 2/427 گرم بود. همچنین این صفات ضرایب تغییرات بالائی را نشان دادند (به ترتیب 03/28 و 3/66) که مقدار آن برای نواحی پوست از 30 تا 80 dm2 و برای نواحی چرم از 38 تا 115 dm2 متغیر بود. قسمت‎های مختلف بدن (شانه، لگن و دنده‏ها) و موقعیت نمونه (موازی و عمود) به طور معنی‎داری تحت تاثیر متوسط نیروی شکستگی، استحکام کششی و ازدیاد طول قطعات تست شده قرار داشتند. طیف گسترده‏ای از مقادیر نیروی شکستگی، استحکام کششی و ازدیاد طول در چرم بزها مشاهده شد (به ترتیب 5/4-0/66 kgf، 4/63-3/558 kgf cm-2 و 0/22-3/141 درصد). نتایج این تحقیق نشان داد که بین صفات کمی و کیفی پوست و چرم بزهای مختلف، اختلاف وجود داشته و برای بدست آوردن یک ویژگی بهتر برای کیفیت محصولات بز، بایستی اختلافات ناشی از سن و جنس دام‎ها را مد نظر قرار داد.  Manuscript profile
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  7 - Explanation the Interaction of the Physical Characteristics of High-rise Buildings on Distribution of Pollutant Particles due to the Natural Air Flow (Case Study: District 1 of Tehran)
  TinaSadat Sadrolgharavi Mahnaz Mahmodi Zrandi fatemeh mehdizadeh seraj
  The increasing population and the construction of high-rise buildings have multiplied the environmental pollution in cities. On the other hand, people are more likely to use open urban environments to meet their biological needs. In this regard, various factors such as More

  The increasing population and the construction of high-rise buildings have multiplied the environmental pollution in cities. On the other hand, people are more likely to use open urban environments to meet their biological needs. In this regard, various factors such as forms, heights and green facade of buildings and the presence of continuous stream of wind can play a significant role in the distribution of pollutant particles. The present study aimed to investigate the effect of the forms and heights of high-rise residential buildings on the distribution of pollutant particles, by recognizing district one of Tehran's urban air flow. To this, a library research method was used to collect information, analytical-descriptive as well as computer simulation with Envi-met software and ANSYS to select the appropriate model. According to the modeling done for the nine different types of building with different forms and heights, it was concluded that changing these factors in residential building on the air flow Natural and wind speeds affect thus affect the distribution of particulate matter. In this study, the results of modeling show the residual amount of particulate matter around 9 tall building models, of which the square shape with 20-degree height in the specified position is more suitable than other options. Manuscript profile
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  8 - Biophysical Characteristics of Deli River Watershed to Know Potential Flooding in Medan City, Indonesia
  Sumihar Hutapea
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  9 - Investigation of Fire Effects on Physical and Chemical Characteristics of Soil in Golandaz Dehbekri Rangeland
  Saed Shahrokhi Sarduo Reza Bagheri Hamzeh Ahmadi Fatemeh Mahdavi
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  10 - Performance evaluation of some alfalfa cultivars on different harvest dates
  Fayzollah Khalaj Mohammad Nasri
  Different varieties of alfalfa respond differently to climatic and environmental conditions. Varieties that can be adapted to the area under cultivation and having high yield and quality performance during different crops and years are suitable. In order to study the ef More

  Different varieties of alfalfa respond differently to climatic and environmental conditions. Varieties that can be adapted to the area under cultivation and having high yield and quality performance during different crops and years are suitable. In order to study the effect of variety on different characteristics of alfalfa, an experiment was conducted based on randomized complete blocks design with four replications in Varamin Agricultural and Natural Resources Research Center. In this study, five foreign Varieties of alfalfa (Timbale), Fasta, Melissa, Meldor, Sovrana imported from France and Hamedani variety, a total of six cultivars of was cultivated in common cultivars Spring (first decade of May). Qualitative and yield characteristics of the studied varieties in three cut (First cut: harvest at 10% flowering stage, second cut: harvest at 50% flowering stage and third cut: harvest at 100% flowering stage). Results showed that interaction between variety type and harvesting stages was significant on yield of fresh forage and protein at 1% level and on dry forage yield at 5% level. The highest fresh and dry forage yield in all treatments was related to Hamedani variety in first cut (26.69 and 5.45 ton per hectare, respectively). As harvesting stages increased, forage yield decreased. The highest protein yield was related to Hamedani variety in the first cut (776.3 kg/hectare) and the lowest protein yield was in Melissa hectare in third cut (244.9 kg/hectare). Among the studied physical traits, the highest (3.48) and lowest (1.93) leaf area index were observed in Hamedani and Melissa varieties, respectively Manuscript profile