The main aim of present study is to ascertain the fungal species and their effect on germination associated with wheat seeds. Seeds of three varieties WH896, PBW-373 and HD264 of wheat (Triticum aestivum) were collect...The main aim of present study is to ascertain the fungal species and their effect on germination associated with wheat seeds. Seeds of three varieties WH896, PBW-373 and HD264 of wheat (Triticum aestivum) were collected from Quarsi Agriculture Farm Aligarh. These three seed samples of wheat showing different forms of discouloration and abnormalities were screened for associated fungi. Microscopic examination of wheat seeds reveals that seeds of all the varieties of wheat possess injuries to varying extent. Detailed examination of the seeds has shown that the seeds can be classified on the basis of extent of injury in the three categories viz., seeds having minor cracks, cracks without exposed embryo and cracks with exposed embryo. Seed soaking and washing techniques were also employed. Fusarium moniliforme and Alternaria alternata were isolated from all the categories of seed tested. Floating mycelial bits and conidia of Alternaria, Fusarium, Drechslera, Curvularia lunata, Mucor were found in all the three varieties of wheat. The seeds were subjected to visual observation and examination under stereoscopic microscope. These findings are to study and detect the phytopathogenic mycoflora which causes damage and loss to our seeds and crops.展开更多
Experiments were conducted for chemical management against panicle mite, Steneotarsonemus spinki using seven treatments. Based on the overall performance of chemicals against this pest, spiromesifen ~ propiconazole, d...Experiments were conducted for chemical management against panicle mite, Steneotarsonemus spinki using seven treatments. Based on the overall performance of chemicals against this pest, spiromesifen ~ propiconazole, diafenthuron ＋ propiconazole and fenpyroxymate alone were found effective against panicle mite and associated grain discolouration. Spiromesifen （1 mL） ＋ propiconazole （l mL） per litre of water was the best treatment which recorded 24.77% increase in grain yield over control.展开更多
In this work, a plasma-solution system was applied to the degradation of Acid Orange 7 （AO？）. The effects of initial concentration and type of feed gases （air, oxygen, nitrogen or argon） were studied. As the init...In this work, a plasma-solution system was applied to the degradation of Acid Orange 7 （AO？）. The effects of initial concentration and type of feed gases （air, oxygen, nitrogen or argon） were studied. As the initial concentration increased from 100 mg/L to 160 mg/L, the discolouration rate of AO7 decreased from 99.3% to 95.9%, whereas the COD removal rate decreased from 37.9% to 22.6%. Air provided the best discolouration and COD removal rates （99.3% and 3？.9%, respectively）. In the presence of a zero-valent iron （ZVI） catalyst, the AO？ COD removal rate increased to 76.4%. The degradation products were analysed by a GC-MS, revealing that the degradation of the dye molecule was initiated through the cleavage of the -N=N- bond before finally being converted to organic acids.展开更多
The mechanism of tarnish caused by exposure to light and Na_2S solution treatment on silver-electroplated deposit and the antitarnish effects of various antitarnish agents have been investigated in this paper. The res...The mechanism of tarnish caused by exposure to light and Na_2S solution treatment on silver-electroplated deposit and the antitarnish effects of various antitarnish agents have been investigated in this paper. The results showed that 1-phenyl-5-mercaptotetrazole (PMTA) has excellent antitarnish effect for UV light and H_2S tests.The studies of XPS and AES and UV absorption spectra showed that PMTA can absorb effectively UV light and form a dense surface film which can prevent effectively the reactions between silver deposit with corrosive media.Antitarnish surface film could be composed of a polynuclear coordination polymeric compound with structure unit approximate to [Ag_3(PMTA)]. according to the depth dependence of percent component (C%) and sputtering time.展开更多
文摘The main aim of present study is to ascertain the fungal species and their effect on germination associated with wheat seeds. Seeds of three varieties WH896, PBW-373 and HD264 of wheat (Triticum aestivum) were collected from Quarsi Agriculture Farm Aligarh. These three seed samples of wheat showing different forms of discouloration and abnormalities were screened for associated fungi. Microscopic examination of wheat seeds reveals that seeds of all the varieties of wheat possess injuries to varying extent. Detailed examination of the seeds has shown that the seeds can be classified on the basis of extent of injury in the three categories viz., seeds having minor cracks, cracks without exposed embryo and cracks with exposed embryo. Seed soaking and washing techniques were also employed. Fusarium moniliforme and Alternaria alternata were isolated from all the categories of seed tested. Floating mycelial bits and conidia of Alternaria, Fusarium, Drechslera, Curvularia lunata, Mucor were found in all the three varieties of wheat. The seeds were subjected to visual observation and examination under stereoscopic microscope. These findings are to study and detect the phytopathogenic mycoflora which causes damage and loss to our seeds and crops.
文摘Experiments were conducted for chemical management against panicle mite, Steneotarsonemus spinki using seven treatments. Based on the overall performance of chemicals against this pest, spiromesifen ~ propiconazole, diafenthuron ＋ propiconazole and fenpyroxymate alone were found effective against panicle mite and associated grain discolouration. Spiromesifen （1 mL） ＋ propiconazole （l mL） per litre of water was the best treatment which recorded 24.77% increase in grain yield over control.
基金supported by National Natural Science Foundation of China(Nos.50908237,51076142)the Open Foundation of the State Key Laboratory of Clean Energy Utilization of China(No.ZJUCEU2009008)
文摘In this work, a plasma-solution system was applied to the degradation of Acid Orange 7 （AO？）. The effects of initial concentration and type of feed gases （air, oxygen, nitrogen or argon） were studied. As the initial concentration increased from 100 mg/L to 160 mg/L, the discolouration rate of AO7 decreased from 99.3% to 95.9%, whereas the COD removal rate decreased from 37.9% to 22.6%. Air provided the best discolouration and COD removal rates （99.3% and 3？.9%, respectively）. In the presence of a zero-valent iron （ZVI） catalyst, the AO？ COD removal rate increased to 76.4%. The degradation products were analysed by a GC-MS, revealing that the degradation of the dye molecule was initiated through the cleavage of the -N=N- bond before finally being converted to organic acids.
文摘The mechanism of tarnish caused by exposure to light and Na_2S solution treatment on silver-electroplated deposit and the antitarnish effects of various antitarnish agents have been investigated in this paper. The results showed that 1-phenyl-5-mercaptotetrazole (PMTA) has excellent antitarnish effect for UV light and H_2S tests.The studies of XPS and AES and UV absorption spectra showed that PMTA can absorb effectively UV light and form a dense surface film which can prevent effectively the reactions between silver deposit with corrosive media.Antitarnish surface film could be composed of a polynuclear coordination polymeric compound with structure unit approximate to [Ag_3(PMTA)]. according to the depth dependence of percent component (C%) and sputtering time.
