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排序方式: 共有194条查询结果,搜索用时 46 毫秒
81.
Seyed Mousa Mousavi Kouhi Mehrdad Lahouti Ali Ganjeali Mohammad H. Entezari 《毒物与环境化学》2013,95(6):861-868
The effects of ZnO nanoparticles (NPs), ZnO microparticles (MPs), and zinc ions (Zn2+) on some growth parameters of rapeseed (Brassica napus) seedlings have been studied. The growth inhibition by ZnO NPs was not stronger than that by ZnO MPs while treatment with Zn2+ inhibition was clearly stronger. 相似文献
82.
Mohammad Naghi Adel Hassan Pourbabaei Seyed Jalil Alavi Ali Salehi 《Russian Journal of Ecology》2017,48(3):219-225
The aim of this study was to determine type of response curves for seventeen woody species (10 tree and 7 shrub species) to soil factors in an intact riparian forest in Safaroud River in northern Iran using HOF function. Data were collected along transects established perpendicular to the water flow on both sides of the river. Results indicated different responses for different woody species. The most common were symmetricunimodal response curves and curves showing an increase in occurrence probability after a certain value in form of a plateau. Bimodal curves were four times more frequent in riverside than forest interior area. It seems that river flow disturbances through frequent floods effect on species tolerance and optimum in riversides. 相似文献
83.
Peyman Amir Nazmi Afshar Mehdy Gooya Seyed Vahid Hosseini 《International Journal of Green Energy》2017,14(11):868-877
The study deals with the design and optimization of external and internal geometry of micro-wind turbines blades. A specified objective function which consists of the power coefficient and the starting time was defined and the genetic algorithm optimization technique in conjunction with the blade-element momentum theory was adopted to find the geometry of the blades including the distributions of the chord, the twist angle and also the shell thickness. Moreover, the allowable stress of the blades was considered as a constraint to the objective function. Results show that a reasonable compromise is achievable such that the starting time of the blades reduces noticeably in return for a small drop in the power coefficient. The significant improvement of the hollow blades over the solid ones indicates that the power coefficient and the starting performance could be improved through the appropriate distributions of the considered decision variables, i.e. the chord, the twist angle and also the shell thickness. 相似文献
84.
Assessment of seasonal variations of carbon dioxide concentration in Iran using GOSAT data 下载免费PDF全文
Seyed Mohsen Mousavi Samereh Falahatkar Manouchehr Farajzadeh 《Natural resources forum》2017,41(2):83-91
Global warming and climate change have been identified as the most important challenges of the 21st century. Greenhouse Gases Observation Satellite (GOSAT) measures the concentrations of carbon dioxide (CO 2) and methane (CH 4) in the atmosphere column from the earth's surface to the upper atmosphere. In this research, GOSAT Thermal And Near Infrared Sensor for Carbon Observation – Fourier Transform Spectrometer (TANSO‐FTS) level 2 data and meteorological parameters were used in the assessment of changes in CO 2 concentration (XCO 2) from 2009 to 2015. We investigated the relationship between XCO 2 and meteorological parameters (temperature and precipitation) obtained from weather stations and the Normalized Difference Vegetation Index (NDVI) in the year 2013 in Iran. The results reveal a steady increase in the mean atmospheric CO 2 concentration, from 384.89 to 400.39 ppm. It was observed that the XCO 2 varied significantly depending on the month, with the highest concentration of CO 2 in April/May and the lowest concentration in August/September. The correlation between XCO 2 and average monthly air temperature is negative, which means that a reduction in XCO 2 with an increase in temperature is dependent on photosynthetic activities in the growing seasons. The highest and lowest correlation coefficient between the NDVI and XCO 2 was obtained in the spring and in the fall, respectively. These findings are useful for recognizing factors that affect CO 2 concentration in different seasons in arid and semi‐arid regions, and as an initial step toward sustainable management. 相似文献
85.
86.
Makhdom Shima Shekarabi Seyed Pezhman Hosseini Shamsaie Mehrgan Mehdi 《Environmental science and pollution research international》2017,24(25):20634-20640
Environmental Science and Pollution Research - The possibility of using different densities of cherry tomato as a bio-filter in a simple media-based aquaponic system to recycle nutrients from pearl... 相似文献
87.
Habib Yazdanshenas Elham Shafeian Maliheh Nasiri Seyed Alireza Mousavi 《Environment, Development and Sustainability》2016,18(4):1217-1238
Traditional and indigenous knowledge on plants usage is a valuable source of information from cultural and natural perspectives, reflecting society’s complicated and close relationship with the environment. Communities have a valuable source of traditional knowledge on the utilization of natural resources, and it is worth to be documented and preserved for current and future applications. We conducted this research to collect and identify plant species of Karvan District and document the traditional knowledge on their use and consumption values. Regarding the results, 150 plant species are used by local communities, more than 30 % of which are directly consumed as food, 24 % (37 species) are used as medicinal plants, and 16.3 % are applied for decoration purposes; 58.6 % of the species are consumed in the raw form, and the remaining is processed before consumption. Leaves (35 %), seeds (21 %) and flowers (21 %) are the most frequent parts of the plants that are used. High number of young emigrants to industrialized areas in seek of job opportunities is threatening this precious source of indigenous knowledge. Attempts to preserve this empirical source of information by encouraging trans-generational knowledge transmission would help to maintain it for future applications. 相似文献
88.
Anjeh Atefeh Mousavi Nabavi Seyed Reza 《Journal of Polymers and the Environment》2022,30(9):3934-3948
Journal of Polymers and the Environment - Chitosan (CS) is a natural biopolymer that due to its excellent properties such as biocompatibility and biodegradability is suitable for use in many... 相似文献
89.
Ghasempour Zahra Khodaeivandi Sepideh Ahangari Hossein Hamishehkar Hamed Amjadi Sajed Moghaddas Kia Ehsan Ehsani Ali 《Journal of Polymers and the Environment》2022,30(7):2800-2811
Journal of Polymers and the Environment - In this study, composite packaging films were produced from relatively inexpensive materials including Whey protein isolate (WPI) and Persian gum (PG),... 相似文献
90.
Mahdavian Seyed Mohammadreza Ahmadpour Borazjani Mahmoud Mohammadi Hamid Asgharipour Mohammad Reza Najafi Alamdarlo Hamed 《Environmental science and pollution research international》2022,29(35):52457-52472
Environmental Science and Pollution Research - Iran’s agricultural production has expanded significantly in recent years. Environmental pollution caused by the use of energy and chemical... 相似文献