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S Husain M Kifayatullah R N Rao 《Journal of the Association of Official Analytical Chemists》1988,71(3):525-527
A simple, specific, and rapid 1H nuclear magnetic resonance spectroscopic method for the assay of phenylbutazone and oxyphenbutazone is described. Spectra are recorded in CDCI3 containing 1,3-dichloro-5-nitrobenzene as an internal standard. The aromatic proton resonances for the standard, at delta 7.7 and 8.2, are well separated from those of phenylbutazone and oxyphenbutazone, which are in the region of delta 6.5-7.3 ppm. Average percent recoveries of phenylbutazone and oxyphenbutazone were 98.9 and 98.6 with standard deviations of 0.6 and 0.7, respectively. Commercial formulations were analyzed and the results obtained by the proposed method closely agreed with those found by the British Pharmacopoeia method. 相似文献
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Kaleem Ullah Kakar Y.-P. Duan Zarqa Nawaz Guochang Sun Abdlwareth A. Almoneafy M. Auwal Hassan Ahmed Elshakh Bin Li Guan-Lin Xie 《European journal of plant pathology / European Foundation for Plant Pathology》2014,138(4):819-834
The study presents the first report on biocontrol of brown sheath rot disease of rice caused by Pseudomonas fuscovaginae using rhizo-bacterial isolate Bacillus amyloliquefaciens Bk7. Four potential bioactive antagonists were selected from 120 Bacillus isolates. Results obtained from in vitro laboratory assay showed that rhizosphere bacterial strain Bk7 and its metabolites significantly suppressed the growth of Pseudomonas fuscovaginae with 93 % efficacy. In glasshouse experiments, strain Bk7 exhibited biocontrol efficacy of 76.6 % by reducing the disease incidence to 16.9 %, compared to 72.8 % observed in control treatment. In addition, the isolate Bk7 showed the growth promotion efficacy of plant height (GPE, 46.4 %) and fresh weight (GPE, 84.3 %). Characterization of isolate Bk7 revealed its strong capability for biofilm formation, inorganic phosphate solubilization and production of high amounts of Indole-3 acetic acid, siderophores and ammonia in vitro. Results obtained from multiplex PCR assay confirmed the presence of five lipopeptide biosynthetic gene markers (srfAA, fenD, bmyB, bacA and ituC) in the genome of strain Bk7. Moreover, Real-time qPCR of these genes demonstrated that surfactin, iturin and bacylisin coding genes were highly expressed in response to P. fuscovaginae exposure in vitro. Rhizosphere bacterial strain Bk7 was identified as B. amyloliquefaciens strain Bk7 based on the analysis of 16S rDNA internal transcribed spacer sequences and a fatty acid methyl ester analysis. The results obtained from this study showed the potential usefulness of Bk7 as a biocontrol agent in disease control of rice brown sheath rot. 相似文献
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Hassan M. Auwal Haitao Wang Lei Li Kaleem-Ullah Kakar 《Acta Agriculturae Scandinavica, Section B - Plant Soil Science》2013,63(5):392-397
Field experiments were conducted in 2011 and repeated in 2012 to study the nematicidal potentials of acacia, brassica, neem, and seaweed as alternatives to chemical nematicide on population management of Heterodera glycines and growth and yield of soybean. Results obtained showed acacia at 200 g, neem at 450 g, brassica at 1000 g, and seaweed at 2000 g caused the maximum suppression of population of H. glycines and produced the highest yield and growth of soybean. Neem, brassica, acacia, and seaweed caused reduction in H. glycines population by 48.3%, 41.4%, 34.5%, and 28.3%, respectively. Also, neem, brassica, acacia, and seaweed produced increase in soybean pods number by 58.7%, 33.7%, 28%, and seaweed 37.9%, respectively. The results obtained showed the potentialities of these plant materials as alternative to synthetic chemical pesticides. The plant could be utilized in a sustainable farming system to save the environment, conserve the biodiversity, and protect man against harmful effects of chemical nematicides. 相似文献
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The 115-gigahertz microwave line of carbon monoxide has been detected in the spectrum of Mars. The measurement is sensitive to carbon monoxide between the surface and an altitude of approximately 50 kilometers in the martian atmosphere. This extends the altitude region to well above that previously sensed. 相似文献
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Kifayatullah Kakar Naomi Asagi Masakazu Komatsuzaki Fumitaka Shiotsu Toshiaki Kokubo 《Plant Production Science》2013,16(4):510-518
ABSTRACTEffects of organic (Italian ryegrass and Bokashi) and chemical fertilizer on growth, yield, and grain quality of rice (Oryza sativa L.) were compared under different planting densities in 2013/2014 and 2014/2015. Italian ryegrass was incorporated into the soil as green manure. Bokashi (a mixture of organic materials) was applied as basal dressing. To measure yield and its components, 30 hills were chosen for each treatment. Rice grains were harvested from each treatment to assess the grain quality and to evaluate accumulation structures using a scanning electron microscope. Bokashi treatment increased panicle number per hill, ripened grain percentage, panicle number per m2, and grain yield compared to no fertilizer treatment at normal planting density. Chemical fertilizer treatment increased plant length at high planting density. Italian ryegrass and Bokashi treatments promoted the taste point (taste score as reference) by reduction of amylose and protein contents at normal planting density in contrast to chemical fertilizer. 1000-grain weight, panicle number per m2, and grain yield were higher at high planting density than at normal planting density. However, high planting density decreased panicle number per hill and spikelet number per panicle. It also enhanced the amylose content of rice grain. Scanning electron microscopic observation revealed that chemical fertilizer treatment marked up protein bodies and their traces on amyloplasts. However, Bokashi treatment produced large amyloplasts, which included many starch granules. These results show that Italian ryegrass and Bokashi can offset reductions of chemical fertilizer and can lead to sufficient starch accumulation structures in rice grains. 相似文献
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白消安（busulfan）对精子发生具有较强毒害作用,可导致雄性不育,是制备精原干细胞（spermatogonial stem cells,SSCs）移植受体的理想药剂。睾丸炎对生精机能也有重要影响,甚至能导致雄性不育。然而,白消安损害血睾屏障（blood-testis barrier,BTB）,影响精子发生的机制尚不清楚,尚不知其是否会导致非传染性睾丸炎症,并影响细胞因子分泌,损害生育能力。因此,本文综述了白消安对BTB的破坏作用、对睾丸细胞相关功能蛋白的影响,以及白消安损伤睾丸的缓解方法,以深入揭示白消安对睾丸细胞和BTB功能与结构的毒害作用,为研发高效安全的SSCs移植受体制备技术,以及化疗药物治疗和环境毒素作用下生精机能科学防护与恢复提供科学参考。 相似文献
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The 115-gigahertz microwave line of carbon monoxide has been detected in the spectrum of Venus. The measurement proves that the carbon monoxide mixing ratio increases above an altitude of 85 kilometers in the Venus stratosphere and provides quantitative information on carbon monoxide in the altitude region from 80 to 110 kilometers. This altitude region is well above that which has been previously sensed. 相似文献
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