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Distribution of Gastropods in the Intertidal Environment of South, Middle and North Andaman Islands, India 预览
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作者 Chinnusamy Jeeva P. M. Mohan +3 位作者 K. K. Dil Baseer Sabith Vibha V. Ubare Mariyappan Muruganantham Radha Karuna Kumari 《海洋科学期刊(英文)》 2018年第1期173-195,共23页
Andaman and Nicobar Islands, the gastropod diversity is high, due to the majority of shores are rocky. The wet rocky shore promotes algal growth, which is ultimate for feeding ground for gastropod growth and developme... Andaman and Nicobar Islands, the gastropod diversity is high, due to the majority of shores are rocky. The wet rocky shore promotes algal growth, which is ultimate for feeding ground for gastropod growth and development leading to more diversity. The global warming, anthropogenic activities, industrial and domestic pollution, etc., have accelerated the loss of coastal and marine biodiversity components over the last few decades which has been of great concern. However, except global warming, the other factors were of least concern with reference to Andaman and Nicobar Islands biodiversity due to a pristine environment. Therefore, exploration of biodiversity in these islands is essential to create a baseline data for record and future research. Four locations of south to north Andaman Islands which represented Carbyns Cove from south Andaman, Rangat and Mayabunder from the Middle Andaman and Diglipur from the North Andaman were selected for this study. Gastropoda species were collected for a period of one year in three prevailing seasons of Andaman and Nicobar Islands. They are South West Monsoon (SW monsoon), North East Monsoon (NE Monsoon) and Non Rainy Seasons (NR Seasons). The present study of gastropods distribution in the South, Middle and North Andaman groups of Islands suggested that there are 71 species belonging to 52 genus and 33 families. At any one of the time and any one of the locations, only one occurrence was noticed for 38 species and remaining 33 species were overlapping with respect to stations and seasons. Evaluation of the cluster suggested that Cluster A (NR season in Carbyns Cove) and Cluster B (NE and SW Monsoon in Mayabunder) as a separate entity among the 12 combinations of stations and seasons due to their species representation. It was also concluded that out of 71 studied species, 3 species were not reported till date in these Island environment and 2 species from any other parts of India. 展开更多
关键词 GASTROPODA ABUNDANCE Species Composition Andaman Sea BAY of BENGAL
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A Total and Convenient Synthesis of Orixiarine 预览
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作者 T. Suresh K. Velmurugan +1 位作者 P. S. Mohan R. Nandhakumar 《有机化学国际期刊(英文)》 2013年第1期48-50,共3页
A simple total synthesis of the quinoline alkaloid, orixiarine was achieved from N-methylaniline and 1-bromo-3-methyl-2-butanone.
关键词 N-METHYLANILINE 1-Bromo-3-methyl-2-butanone Orixiarine TOTAL Synthesis
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Identification of Y-Nauplii (Facetotecta) in Andaman Sea, India 预览
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作者 V. Swathi P. M. Mohan 《海洋科学期刊(英文)》 2019年第3期137-147,共11页
The Facetotecta is among the lesser known groups in the world ocean. The present study recorded two types of Facetotecta in the Andaman Sea, off Andaman Islands. These two types of Facetotecta were observed during the... The Facetotecta is among the lesser known groups in the world ocean. The present study recorded two types of Facetotecta in the Andaman Sea, off Andaman Islands. These two types of Facetotecta were observed during the period of August 2015, July 2016 and October 2017 and identified as Type I Hansenocaris corvinae and Type IX Hansenocaris leucadea. However, the cursory analysis suggested that the Type IX is a new type of Facetotecta and named it as Type XII Hansenocaris portblairenae sp. (nov). This finding suggests that this Facetotecta observation is the first report in the Andaman Sea, as well as in the Indian Ocean Region. 展开更多
关键词 Y-Nauplii Facetotecta Andaman Sea Andaman ISLANDS INDIAN OCEAN
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1, 4-Bis (2-nitrobenzylidene) thiosemicarbazide as Effective Corrosion Inhibitor for Mild Steel
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作者 P Mohan G. Paruthimal Kalaignan 《材料科学技术学报:英文版》 SCIE EI CAS CSCD 2013年第11期1096-1100,共5页
The inhibition efficiency of 1,4-bis(2-nitrobenzylidene) thiosemicarbazide(BBTS) on the corrosion of mild steel in 1 mol/L HCI was investigated by potentiodynamic polarization and electrochemical impedance methods.Inh... The inhibition efficiency of 1,4-bis(2-nitrobenzylidene) thiosemicarbazide(BBTS) on the corrosion of mild steel in 1 mol/L HCI was investigated by potentiodynamic polarization and electrochemical impedance methods.Inhibition efficiency(IE),corrosion rate and surface coverage were evaluated at different concentrations of BBTS.The results of the investigation showed that this compound had good inhibiting properties for mild steel corrosion in hydrochloric acid and BBTS was a mixed-type inhibitor.BBTS chemisorbed at the electrode surface obeyed Langmuir adsorption isotherm and formed a stable surface complex on the mild steel surface.The synergistic effect of halide ion in acid solution suggested a co-adsorption of BBTS inhibitor by the adsorbed iodide ion. 展开更多
关键词 氨基硫脲 低碳钢 缓蚀剂 苄基 硝基 LANGMUIR 表面覆盖率 吸附等温线
Fracture Toughness Studies of Polypropylene- Clay Nanocomposites and Glass Fibre Reinfoerced Polypropylene Composites 预览
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作者 A. Ramsaroop K. Kanny T. P. Mohan 《材料科学与应用期刊(英文)》 2010年第5期301-309,共9页
In this paper, a comparative study on the fracture toughness of woven glass fibre reinforced polypropylene, chopped glass fibre reinforced polypropylene and nanoclay filled polypropylene composites is presented. Nanoc... In this paper, a comparative study on the fracture toughness of woven glass fibre reinforced polypropylene, chopped glass fibre reinforced polypropylene and nanoclay filled polypropylene composites is presented. Nanoclays (Cloisite 15A) of 1 wt. % to 5 wt. % were filled in polypropylene (PP) matrix and they were subjected to fracture toughness stu-dies. The specimen with 5 wt. % nanoclay showed 1.75 times and 3 times improvement in critical stress intensity factor (KIC) and strain energy release rate (GIC), respectively, over virgin PP. On the other hand, 3 wt. % nanoclay PP composites showed superior crack containment properties. These structural changes of composite specimens were examined using Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD) methods. It showed that exfoli-ated nanocomposite structures were formed up to 3 wt. % nanoclay, whereas, intercalated nanocomposite structures formed above 3 wt. % nanoclay in the PP matrix. Furthermore, the woven fibre reinforced PP composites demonstrated superior crack resistant properties than that of clay filled nanocomposites and chopped fibre PP composites. However, KIC and GIC values for woven fibre composites were lesser than that of chopped fibre composites. Moreover, KIC and GIC values for both nanoclay filled PP composites and woven fibre composites are comparable even though the clay filled PP demonstrated catastrophic failure. Also, the crack propagation rate of PP-nanoclay composites is comparable to that of chopped fibre composites. 展开更多
关键词 Fibre Reinforced Composites Polymer CLAY NANOCOMPOSITES Stress Intensity Factor CRACK Growth CRACK INITIATION Fracture TOUGHNESS
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超载商用车作用下的柔性路面性能研究 预览
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作者 P.Ram Mohan Rao B.B.Reddy +1 位作者 A.Veeraragavan 吕东旭 《交通建设与管理》 2007年第6期17-22,共6页
路面结构所承受的车轮反复荷载的强度和频率是影响路面使用寿命的主要因素之一。现今大多数货车发动机都能够运载超过法定最高载重量的载荷,货车业主和经营者也都倾向于车辆超载运营,以期在单位投资和人力成本下能够获得更多利润。为... 路面结构所承受的车轮反复荷载的强度和频率是影响路面使用寿命的主要因素之一。现今大多数货车发动机都能够运载超过法定最高载重量的载荷,货车业主和经营者也都倾向于车辆超载运营,以期在单位投资和人力成本下能够获得更多利润。为保证货车在大载重量的同时能够将轴载控制在合法范围内,现已设计出多轴货车,包括后双轴货车。本文就超载货车对印度卡纳塔克邦州州公路网(约4000公里)主要干道路面性能/寿命的影响展开研究。该研究通过轴载调查数据,针对两种不同情形计算车辆损害系数(VDF)。一是根据实地轴载数据大小分布情况;二是将超载单轴转化为双轴/等效标准轴。计算结果通过衰变模型和性能标准对路面性能/寿命进行预测分析,从而评估路面养护管理的益处。研究显示,货车的超载率非常高(主要是后轴超载),因此导致路面损害范围扩大,降低路面的使用寿命。从分析结果可以看出,双轴或者等效标准轴货车能减少路面超载,降低对路面损害程度。本文根据研究结果绘制了路面寿命/标准轴重复荷载的图表,以确定控制超载的益处。 展开更多
关键词 损害系数 超载 轴载调查 路面损坏 商用车辆 货车 载重量 双轴车辆 标准轴 路面性能
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生防制剂与呋喃丹颗粒剂防治根结线虫幼虫的效果 预览 被引量:1
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作者 N.VijayaKumari P.Sjathamma 《浙江农业学报》 CSCD 2002年第3期 159-162,共4页
印度南方根结线虫广泛地分布于印度南部灌溉桑园,特别是轻质土壤的桑园,它严重地影响桑叶的产量和质量.人们曾采用农业和化学等防治措施进行桑园线虫的防治,但效果并不理想.为此,考虑用生物防治方法来进行试验研究.本研究采用拟青霉和... 印度南方根结线虫广泛地分布于印度南部灌溉桑园,特别是轻质土壤的桑园,它严重地影响桑叶的产量和质量.人们曾采用农业和化学等防治措施进行桑园线虫的防治,但效果并不理想.为此,考虑用生物防治方法来进行试验研究.本研究采用拟青霉和轮枝孢真菌两种生防制剂及化学杀线虫剂呋喃丹颗粒剂对线虫幼虫进行致死性试验,每种生物制剂滤液设置3个浓度,分别为100%,75% 和50%.结果发现,该两种真菌制剂在滤液浓度100%下72 h 后的杀虫率分别为73.55%和78.45%,两者无显著差异.虽然它们对幼虫的致死效果比化学杀线虫剂呋喃丹效果略微差些,但生物制剂对自然环境、人畜安全.因此,生物制剂有望成为更经济、更安全的杀线虫剂. 展开更多
关键词 生防制剂 呋喃丹颗粒剂 根结线虫 生物杀线虫剂 防治效果 桑树害虫
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Lucio现象和Lucio麻风 预览
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作者 Kaur C Thami G.P +1 位作者 Mohan H 崔荣 《世界核心医学期刊文摘:皮肤病学分册》 2005年第10期42-42,共1页
关键词 Lucio 结节型 反应状态 发病机制
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