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排序方式: 共有157条查询结果,搜索用时 31 毫秒
51.
A. Muthu Manokar M. Vimala D. Prince Winston D. R. Rajendran Ravishankar Sathyamurthy A. E. Kabeel 《亚洲传热研究》2020,49(6):3651-3662
In this paper, a year around energy efficiency (EnE) and economic analysis of single slope solar still (SSSS), the single slope solar still with glass cooling (SSSSGC), the single slope solar still with basin heating (SSSSBH), and the single slope solar still with glass cooling and basin heating (SSSSGCBH) was carried out based on the distilled water production. The annual yield production from the SSSS, SSSSGC, SSSSBH, and SSSSGCBH were 476.16, 637.44, 970.24, and 1167.36 kg, respectively. The yearly yield produced from the SSSSBH and SSSSGCBH was increased by 50.92% and 59.21%, respectively, as compared with the SSSS. Moreover, the annual EnE of the SSSSGCBH was 28.75%. However, the EnE of the SSSS was 11.73%. Also, freshwater making cost is found to be 18.9, 24.9, 37.9, and 45.6 Rs/day for the SSSS, SSSSGC, SSSSBH, and SSSSGCBH, respectively, if the buying cost of freshwater is Rs 10. 相似文献
52.
Uptake of methyl bromide was greater at high concentrations with an exposure period of 2 hr than at lower concentrations with an exposure period of 5 hr, but mortality did not increase accordingly. Some fumigant was desorbed from insects after treatment and desorption was greater in those exposed for the shorter period. Statistical analysis on the three major variables which contribute to toxicity, namely concentration, time and fumigant uptake, showed that, for purposes of calculation, only the two factors, concentration and time, need to be considered; inclusion of data on uptake into the model did not provide appreciable contribution to explain the observed mortalities beyond that already given by concentration and time. A model which includes concentration, time and interaction between the two was found to describe the dosage-response relationship better than concentration and time alone. 相似文献
53.
54.
S. Muthu Kumaran M. Ashok Kumar 《Journal of Materials Science: Materials in Electronics》2012,23(3):811-815
ZnS:Cu thin films have been deposited on glass substrate by a simple neutral pH solution synthesis route and chemical bath
deposition technique. The copper concentration was varied between 0 and 0.1 M%. The X-ray diffraction and scanning electron
microscope studies show the average size of the nanoparticles are below 4 nm (Bohr diameter). The effect of film thickness
on the optical and structural properties has been studied. The optical absorption studies show the band gap energy of ZnS:Cu
films decreases from 3.68 to 3.43 eV as thickness varied from 318.3 to 334.1 nm. The structural estimation shows the variation
in particle size from 2.67 to 3.14 nm with thickness. The insignificant change in band gap may be due to the increase in particle
size and quantum size effect. 相似文献
55.
S. Muthu Kumaran 《Materials Science and Engineering: A》2011,528(12):4152-4158
Non-destructive diagnosis of nano-scale pre-precipitation and precipitation events can provide valuable support in controlling the thermal treatment for achieving the peak aged or any alternate desired microstructural state. The aim of the present investigation is to study the effect of isothermal ageing on density and hardness of 2024 Al-Cu-Mg alloy, and also to search the ability of measured ultrasonic velocity and attenuation and calculated elastic constants for monitoring the variations in microstructure and precipitation events during ageing. The specimens aged at 463 K for various periods up to 32 h followed by a solution annealed at 766 K for 1 h and water quenched, have been used for the ultrasonic velocity and attenuation measurements and metallurgical studies. The initial sharp acceleration in the hardness and velocities is due to the depletion of Cu from solid solution associated with the formation and growth of Cu-Mg co-cluster (GPB zone) and other intermediate phases. The local maximum at 10 h ageing time is due to the presence of higher volume fraction of precipitates like S′ and S and the minimum at 32 h of ageing time is due to the existence of dissolution and coarsening of S′ and S precipitates by overaged effect. 相似文献
56.
N′‐Alkylaminosulfonyl Analogues of 6‐Fluorobenzylideneindolinones with Desirable Physicochemical Profiles and Potent Growth Inhibitory Activities on Hepatocellular Carcinoma 下载免费PDF全文
Dr. Xiao Chen Dr. Tianming Yang Amudha Deivasigamani Dr. Muthu K. Shanmugam Prof. Kam‐Man Hui Prof. Gautam Sethi Prof. Mei‐Lin Go 《ChemMedChem》2015,10(9):1548-1558
The benzylideneindolinone 6‐chloro‐3‐(3′‐trifluoromethylbenzylidene)‐1,3‐dihydroindol‐2‐one ( 4 ) was reported to exhibit potent and selective growth inhibitory effects on hepatocellular carcinoma (HCC). Corroborative evidence supported multi‐receptor tyrosine kinase (RTK) inhibition as a possible mode of action. However, the poor physicochemical properties of 4 limited its furtherance as a lead compound. In this study, the modification of 4 was investigated with the aim of improving its potency and physicochemical profile. The 6‐fluorobenzylideneindolinone 3‐12 bearing a 3′‐N‐propylaminosulfonyl substituent was found to be a promising substitute. Compound 3‐12 [6‐fluoro‐3‐(3′‐N‐propylaminosulfonylbenzylidene)‐1,3‐dihydroindol‐2‐one] was found to be tenfold more soluble than 4 and to have sub‐micromolar growth inhibitory activities on HCC cells. It is apoptogenic and inhibits the phosphorylation of several RTKs in HuH7, of which the inhibition of FGFR4 and HER3 are prominent. Compound 3‐12 decreased the tumor load in a physiologically relevant orthotopic HCC xenograft murine model. Structure–activity relationships support pivotal roles for the fluoro and N′‐propylaminosulfonyl moieties in enhancing cell‐based activity and moderating the physicochemical profile (solubility, permeability) of 3‐12 . 相似文献
57.
T.S. Balasubramanian V. Balasubramanian M.A. Muthu Manickam 《Materials & Design》2011,32(8-9):4509-4520
The present investigation is aimed to evaluate fatigue crack growth parameters of gas tungsten arc, electron beam and laser beam welded Ti–6Al–4V titanium alloy for assessing the remaining service lives of existing structure by fracture mechanics approach. Center cracked tensile specimens were tested using a 100 kN servo hydraulic controlled fatigue testing machine under constant amplitude uniaxial tensile load. Crack growth curves were plotted and crack growth parameters (exponent and intercept) were evaluated. Fatigue crack growth behavior of welds was correlated with mechanical properties and microstructural characteristics of welds. Of the three joints, the joint fabricated by laser beam welding exhibited higher fatigue crack growth resistance due to the presence of fine lamellar microstructure in the weld metal. 相似文献
58.
An adaptive three-dimensional isogeometric formulation based on rational splines over hierarchical T-meshes (RHT-splines) for problems in elasto-statics and elasto-dynamics is presented. RHT-splines avoid some short-comings of NURBS-based formulations; in particular they allow for adaptive h-refinement with ease. In order to drive the adaptive refinement, we present a recovery-based error estimator for RHT-splines. The method is applied to several problems in elasto-statics and elasto-dynamics including three-dimensional modeling of thin structures. The results are compared to analytical solutions and results of NURBS based isogeometric formulations. 相似文献
59.
Singaram Muthu Pichai Maruthamuthu 《Fullerenes, Nanotubes and Carbon Nanostructures》1996,4(5):1061-1066
The chlorosulphonylisocyanate reacts smoothly with C60 in xylene under thermal conditions in a [2+2]-cycloaddition fashion to yield the bisadduct as one of the products in the inseparable reaction mixture. The reaction product is analysed by FAB-MS, 13C NMR, FT-IR and HPLC techniques. Results show the formation of imino-lactone as one of the favourable products. 相似文献
60.
Nulling interferometry has been proposed for the direct detection of Earth-like planets. Deep stable nulls require careful control of the relative intensity and phase of the beams that are being combined. We present a novel compensator, the Adaptive Nuller, that corrects the intensity and phase as a function of wavelength from 8 to 12 microm using a deformable mirror. This compensator has been used to produce rejection ratios of 82,000:1 over a bandwidth of 3.2 microm centered around 10 microm. 相似文献