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不同环境变量下银胶菊叶甲的生命表(英文)
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作者 OMKAR shruti rastogi Ahmad PERVEZ 《昆虫学报》 CAS CSCD 北大核心 2013年第11期1286-1293,共8页
在室内研究了不同环境变量(如食物、温度、光周期和不同光波长)下银胶菊杂草Parthenium hysterophorus L.的食叶昆虫和生物防治因子银胶菊叶甲Zygogramma bicolorata Pallister的生命表。不同发育阶段的该种叶甲取食银胶菊不同部位时,... 在室内研究了不同环境变量(如食物、温度、光周期和不同光波长)下银胶菊杂草Parthenium hysterophorus L.的食叶昆虫和生物防治因子银胶菊叶甲Zygogramma bicolorata Pallister的生命表。不同发育阶段的该种叶甲取食银胶菊不同部位时,取食花的甲虫死亡率指标Kappa值最低,其次是取食叶片和茎;而取食花时甲虫世代存活率最高。温度显著影响主要发育阶段该种叶甲的死亡率和存活率。27℃下饲养的未成熟期甲虫的Kappa值最低,其次是30,25,20和35℃。世代存活和存活率表现相同的趋势。不同光周期显著影响死亡率,在14L∶10D(长日照)下世代存活最好,其次是12L∶12D(昼夜相等),10L∶14D(短日照),24L∶0D(连续光照)和0L∶24D(连续黑暗)。甲虫对不同波长光的反应上,在白光(广谱)下Kappa值最低,世代存活率最高,其次是黄光(λ≈570 nm)、蓝光(λ≈475 nm)和红光(λ≈650 nm)。卵的死亡率最高。不同发育阶段的甲虫在27℃长日照白光下用银胶菊花饲养最佳。死亡率趋势具有严格和显著的阶段特异性,表现出内在的存活效应,与研究的因素无关。 展开更多
关键词 银胶菊叶甲 银胶菊 寄主植物 存活 死亡率 生命表
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Superposability in Hydrodynamic and MHD Flow
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作者 shruti rastogi Brijender Nath Kaul Sanjeev Rajan 《Open Journal of Fluid Dynamics》 2015年第2期151-170,共20页
In this paper, phenomena of superposability and self superposability in hydrodynamics and magneto hydrodynamics have been discussed. One of the most important applications of superposability in hydrodynamics is the co... In this paper, phenomena of superposability and self superposability in hydrodynamics and magneto hydrodynamics have been discussed. One of the most important applications of superposability in hydrodynamics is the construction of exact analytic solution of the basic equation of fluid dynamics. Kapur and Bhatia have given a simple idea that if two velocity vectors have self superposable and mutually superposable motion then sum or difference of these two is self superposable and vice versa and if each of the vector is superposable on the third then their sum and difference are also superposable on the third. For superposability in magneto-hydrodynamics many mathematicians like Ram Moorthy, Ram Ballabh, Mittal, Kapur & Bhatia and Gold & Krazyblocki have defined it in various ways, especially Kapur & Bhatia generalized the well-known work on superposability by Ram Ballabh to the case of viscous incompressible electrically conducting fluids in the presence of magnetic field. We found the relationship of two basic vectors for two important curvilinear coordinate systems for their use in our work. We’ve found the equations of div, curl and grad for a unit vector in parabolic cylinder coordinates and ellipsoidal coordinates for further use. 展开更多
关键词 Superposability HYDRODYNAMICS and MAGNETO-HYDRODYNAMICS MHD FLOW
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