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排序方式: 共有107条查询结果,搜索用时 109 毫秒
81.
Ullah Sami Assiri Mohammed Ali Bustam Mohamad Azmi Al-Sehemi Abdullah G. Abdul Kareem Firas A. Irfan Ahmad 《Paddy and Water Environment》2020,18(2):455-468
Paddy and Water Environment - The use of low-cost adsorbents produced from rice husks that can selectively remove zinc (II) ion from wastewater effluent has been investigated. The disorder and... 相似文献
82.
Settlement and growth of the mussels (Mytilusgalloprovincialis,Lamarck, 1819) on different collectors suspended from an offshore submerged longline system in the Black Sea 下载免费PDF全文
Meryem Yeşim Çelik Sedat Karayücel İsmihan Karayücel Bora Eyüboğlu Recep Öztürk 《Aquaculture Research》2016,47(12):3765-3776
A study of spat settlement of a submerged longline mussel culture system was carried out in Sinop area, Black Sea, between May 2008 and May 2009. The effects of six different types of collectors on spat settlement and growth were investigated. Six different types of spat settlement rope were used as polypropylene ropes with 18 mm diameter, 18 mm diameter timeworn silk rope, 22 mm diameter rope made from old hawser (OSR), 22 mm diameter ropes made from old anchovy net without pegs, 18 mm diameter old used nylon ropes and 18 mm diameter tasselled polypropylene ropes. Monthly temperature, salinity, chlorophyll‐a, total suspended matter, inorganic matter and organic matter were determined during the experimental period. The best settlement was observed on the OSR type when measured per metre (3450.00 ± 125.83 ind m?1). Consequently, the findings showed that settlement preference of spat occurred according to rope structure, and if ropes are designed to combine numerous well‐fixed tassels, spat settlement can increase. Spat growth was affected by environmental factors and rope structure. In addition, the study revealed a negative relationship between density and growth. 相似文献
83.
M. Farooq M. Irfan T. Aziz I. Ahmad S. A. Cheema 《Journal of Agronomy and Crop Science》2013,199(1):12-22
The study, consisting of two independent experiments, was conducted to evaluate the role of seed priming with ascorbic acid (AsA) in drought resistance of wheat. In the first experiment, seeds of wheat cultivars Mairaj‐2008 and Lasani‐2008 were either soaked in aerated water (hydropriming) for 10 h or not soaked (control). In the second experiment, seeds of same wheat cultivars were soaked in aerated (2 mm ) AsA solution (osmopriming) or water (hydropriming) for 10 h. In both experiments, seeds were sown in plastic pots (10 kg) maintained at 70 % and 35 % of water‐holding capacity designated as well watered and drought stressed, respectively. Both experiments were laid out in a completely randomized design with six replications. Drought caused delayed and erratic emergence and disturbed the plant water relations, chlorophyll contents and membranes because of oxidative damage; however, root length in cultivar Lasani‐2008 was increased under drought. Hydropriming significantly improved the seedling emergence and early growth under drought and well‐watered conditions; however, improvement was substantially higher from osmopriming with AsA. Similarly, osmopriming with AsA significantly improved the leaf emergence and elongation, leaf area, specific leaf area, chlorophyll contents, root length and seedling dry weight. Owing to increase in proline accumulation, phenolics and AsA, by seed priming with AsA, plant water status was improved with simultaneous decrease in oxidative damages. These improved the leaf emergence and elongation, and shoot and root growth under drought. However, there was no difference between the cultivars in this regard. In conclusion, osmopriming with AsA improved the drought resistance of wheat owing to proline accumulation and antioxidant action of AsA and phenolics, leading to tissue water maintenance, membrane stability, and better and uniform seedling stand and growth. 相似文献
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Ten different two-spotted spider mite (Tetranychus urticae Koch) populations were collected from greenhouses in two geographically different regions of Turkey, Antalya and Isparta. Individual spider mites were homogenized in microplates using multi-homogenizer, and the genetic variations in the esterase of these populations were studied by nondenaturing polyacrylamide gel electrophoresis. The results showed that esterase enzymes were polymorphic in all populations in both regions. However more intrapopulation and interpopulation variations were observed in the population from Antalya region. 相似文献
86.
Recep Liman?brahim Hakk? Ci?erci Dilek Aky?lYasin Eren Muhsin Konuk 《Pesticide biochemistry and physiology》2011,99(1):61-64
Genotoxic effects of Fenaminosulf, fungicide and micro-biocide, were examined by using mitotic index (MI), mitotic phase, and Comet assay on the root meristem cells of Allium cepa. In the Allium root growth inhibition test, EC50 value was firstly determined as 25 ppm and, 12.5 (0.5 × EC50), 25 (EC50) and 50 (2 × EC50) ppm concentrations of Fenaminosulf were introduced to onion tuber roots. Distilled water was used as a negative control. All obtained data were subjected to statistical analyses by using SPSS 15.0 for Windows software. For comparison purposes, Duncan multiple range tests by using one-way analysis of variance (ANOVA) were employed and p < 0.05 was accepted as significant value. While MI (except in 24 h at 12.5 and 50 ppm) and prophase index increased, metaphase, anaphase and telophase indexes decreased in all concentrations compared to control at each exposure time. A significant increase in DNA damage was also observed at the concentration of 25 ppm in 24 h, 25 and 50 ppm in 96 h by Comet assay. 相似文献
87.
Ahmad Munib Chand Naila Khan Rifat Ullah Ahmad Nazir Khattak Irfan Naz Shabana 《Tropical animal health and production》2020,52(2):711-715
Tropical Animal Health and Production - The aim of the study was to investigate the influence of dietary supplementation of various levels of milk thistle (MT) on growth performance, oxidative... 相似文献
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Ali Irfan Ilbas Semih Yilmaz Mikail Akbulut Oleg Bogdevich 《Journal of plant nutrition》2013,36(3):442-452
Selenium (Se) is an essential micronutrient for humans and animals, and also affects plant metabolism. In this study, the effects of increasing doses of Se application on the uptake of selenium (Se), nitrogen (N), and sulfur (S) content of three barley cultivars were investigated. The analysis indicated that the Se contents were highest in root tissues, intermediate in grain, and lowest in stem tissues in all cultivars. Total Se accumulations (whole plant) were highest in ‘Bülbül 89’ (0.171 mg kg?1), intermediate in ‘Çetin 2000’ (0.153 mg kg?1), and lowest in ‘Tarm 92’ cultivars (0.124 mg kg?1). In all cultivars, the increase in grain Se content resulted in a decrease in the grain N content. While ‘Bülbül 89’ can be suggested for biofortification purposes, less Se accumulating ‘Tarm 92’ cultivar can be suggested as a fodder in Se contaminated or high Se containing areas. 相似文献