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Long-term economic sensitivity analysis of light duty underground mining vehicles by power source

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International Journal of Mining science and Technology 2017年第3期27卷 567-571页

作者： schatz Richard s. Nieto Antonio Lvov serguei N. The EMs Energy Institute College of Earth and Mineral Engineering The Pennsylvania State University State College PA 16802 USA Department of Energy and Mineral Engineering College of Earth and Mineral Engineering The Pennsylvania State University State College PA 16802 USA Department of Materials science and Engineering College of Earth and Mineral Engineering The Pennsylvania State University State College PA 16802 USA

LHD's are expensive vehicles; therefore, it is important to accurately define the financial consequences associated with the investment of purchasing the mining equipment. This study concentrates on longterm incremental and sensitivity analysis to determine whether it is feasible to incorporate current battery technology into these machines. When revenue was taken into account, decreasing the amount of haulage in battery operated equipment by 5% or 200 kg per h amounts to a $4.0 × 10~4 loss of profit per year. On average it was found that using battery operated equipment generated $9.5 × 10~4 more in income annually, reducing the payback period from seven to two years to pay back the additional $1.0 × 10~5 investment of buying battery powered equipment over cheaper diesel equipment. Due to the estimated 5% increase in capital, it was observed that electric vehicles must possess a lifetime that is a minimum of one year longer than that of diesel equipment.

关键词： sensitivity analysis Underground mining vehicles Battery power Battery mining equipment Economic evaluation

Application of high silica zeolite ZsM-5 in a hybrid treatment process based on sequential adsorption and ozonation for VOCs elimination

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Journal of Environmental sciences 2016年第3期28卷 59-68页

作者： Hicham Zaitan Marie Hélène Manero Héctor Valdés Laboratoire de Chirmie de la Matiere Condensee(LCMC) Faculte des Sciences et TechniquesUniversite Sidi Mohamed Ben AbdellahB.P.2202FesMaroc Universite de Toulouse INPTUPSLaboratoire de Genie Chimique4Allee Emile MonsoF-31030 ToulouseFrance CNRs Laboratoire de Genie ChimiqueF-31030 ToulouseFrance Laboratorio de Tecnologias Limpias(F.Ingenieria) Universidad Catolica de la Santisima ConcepcionAlonso de Ribera 2850ConcepcionChile

In this study,a hydrophobic synthetic zeolite,namely ZsM-5 is chosen as an adsorbent/catalyst for toluene *** results showed that toluene adsorption onto ZsM-5 was favourable,following a Langmuir adsorption isotherm ***-5 zeolite was regenerated using gaseous ozone at low *** toluene was oxidised,releasing mainly CO_2 and H_*** of oxidation by-products such as acetic acid and acetaldehyde were formed and remained adsorbed after the oxidativate regeneration with *** four successive cycles of adsorption/ozonation,the adsorption efficiency was not affected（92%-99%）.These results showed that volatile organic compound（VOC）removal by adsorption onto ZsM-5 zeolite followed by ozone regeneration could be used as a promising hybrid process for the control of VOC emissions in terms of efficiency.

关键词： Adsorption Ozone Toluene VOCs Zeolite

Comparative study on production,purification of penicillin by Penicillium chrysogenum isolated from soil and citrus samples

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Asian Pacific Journal of Tropical Biomedicine 2011年第1期1卷 15-19页

作者： s Anto Jeya Dayalan Pramod Darwin Prakash s Department of Biotechnology Udaya School of Engineering

Objective:To explore various unexplored locations where Penicillium *** be available and study the production of penicillin from the isolated Penicillium *** different media with altered carbohydrate ***:The collected soil samples were screened for the isolation of Penicillium chrysogenum(***) by soil dilution *** isolated Penicillium species were further grown in different production media with changes in the carbohydrate *** extracted penicillin from various isolates was analyzed by HPLC for the efficacy of the *** the products were screened with various bacterial species including methicillin resistant staphylococcus aureus(MRsA).And the work was extended to find the possible action on MRsA,along with characterization using other ***:From the various soil and citrus samples used for analysis,only the soil sample from Government General Hospital of Bangalore,India,and sanjay Gandhi Hospital,Bangalore,India,showed some potential growth of the desired fungi *** production media showed varied range of growth of *** production of penicillin was obtained in maltose which proved maximum zone of inhibition during *** of penicillin on pathogens,like wild Escherichia coli strain,Klebsiella spp.,and MRsA,gave quite interesting results such as no activity on the later strain as it is *** data provided the analytical and confirmation details of the penicillin ***,the penicillin produced from the soil sample of Government General Hospital had the high milli absorbance unit of 441.5 mAu compared with that of the penicillin produced from sanjay Gandhi Hospital sample,8s.s2 ***,there was a considerable change in quantity of the penicillin produced from both the ***: The Penicillium *** be possibly rich in hospital contaminants and its *** research focuses on various unexplored sources o

关键词： Penicillium chrysogenum soil Citrus Penicillin Bioefficacy Antibiotic activity Penicillium spp. Production soil dilution plate staphy lococcus aureus Characterization Production media Zone of inhibition Carbohydrate source Isolation Efficacy Pathogen

summary evidence on the effects of varicocele treatment to improve natural fertility in subfertile men

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Asian Journal of Andrology 2016年第2期18卷 239-245,J0005页

作者： Bruno C Tiseo sandro C Esteves Marcello s Cocuzza Department of Urology University of Sao Paulo Av. Dr. Eneas de Carvalho Aguiar 255 7 andar - Sala 710F Sao Paulo 05403-000 Brazil ANDROFERT Center for Male Reproduction Av. Dr. Heitor Penteado 1464 Campinas Sao Paulo 13075-460 Brazil.

The objective of this review was to summarize the evidence concerning the benefit of varicocele treatment to improve natural fertility in subfertile males. We also analyzed the effect of varicocele treatment on conventional semen parameters and sperm functional tests. An electronic search to collect the data was performed using the PubMed/MEDLINE databases until July 2015. Data pooled from a variety of study designs indicate that varicocelectomy improves semen parameters in the majority of the treated men with clinical varicocele and abnormal semen parameters regardless of the chosen surgical method. surgical varicocele repair was beneficial not only for alleviating oxidative stress-associated infertility but also to improve sperm nuclear DNA integrity. However, given the low magnitude of the effect size in sperm DNA integrity, further research is needed to elucidate its clinical significance. Conflicting results on the effect of varicocele treatment on natural fertility seem to be due to heterogeneous study designs and, more importantly, patient selection criteria. When these issues are controlled, current evidence indicates that treatment of subclinical varicocele is not warranted, as it does not seem to improve fertility. On the contrary, fair evidence indicates that varicocele treatment should be offered to infertile patients with palpable varicocele and abnormal semen parameters. This evidence supports the current guidelines issued by the American Urological Association and European Association of Urology, which state that varicocele treatment should be offered to male partners of infertile couples presenting for evaluation with clinical varicocele and semen parameters alterations.

关键词： male infertility review treatment outcome varicocele varicocelectomy

Rheological behavior,microstructure and hardness of A356 aluminum alloy in semisolid state using backward extrusion process

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中国有色金属学会会刊：英文版 2010年第S3期20卷 906-910页

作者： s.A.sADOUGH M.R.RAHMANI V.POUYAFAR Center of Excellence in Termoelasticity Amir Kabir University of Technology Department of Mechanical Engineering Islamic Azad University Science and Research Branch

The influence of temperature on the flow behavior and rheological characteristics of an A356 alloy in the semi-solid state was investigated using backward extrusion *** were performed at 5 temperatures and 4 different wall *** were determined using the force-displacement graphs obtained form back extrusion *** observed experimentally,at a constant temperature,the increase of shear rate results in the decrease of alloy viscosity *** the temperature increases the liquid fraction hence reduces the semi-solid alloy *** and image analyses show that,because of low forming speed,liquid has time to escape from solid phase forward the sample *** condition is the main reason for the segregation phenomenon seen in the base and *** hardness test on samples reveals that the hardness increases with the decrease of temperature and wall thickness.

关键词： aluminum alloy A356 backward extrusion semisolid forming rheology

Quality of spring water used for irrigation in the Almora District of Uttarakhand, India

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Chinese Journal Of Geochemistry 2013年第2期32卷 130-136页

作者： Bhandari N. s. Hemant K. Joshi Department of Chemistry Kumaun University S. S. J. Campus Almora-263601 Uttarakhand India

This paper aims to propose a quality profile of springs of the study area for irrigation. In the present study, fifty-four springs in Almora have been identified from rural as well as urban localities for calculation of irriga- tional water quality parameters during pre-monsoon, monsoon and post-monsoon, 2008. spring water samples are collected and analyzed for pH, electrical conductivity (EC), total dissolved solids (TDs), Na+ , K+ , Ca2+ , Mg2+ , HCO3- , Cl- , and sO42- . Different irrigation quality parameters viz. salinity, sodium adsorption ratio (sAR), soluble sodium percentage (ssP), residual sodium carbonate (RsC), magnesium hazards (MH) and permeability index (PI) are calculated for the evaluation of spring water quality for irrigation purposes. All springs are found excellent to good based on irrigation quality parameters. Based on Wilcox diagram, about 98% of the water resources are grouped as C1s1 (low-low) and C2s1 (medium-low) classes, so springs are suitable for normal irrigation.

关键词：质量档案灌溉泉水印度钠吸附比水质参数总溶解固体研究区域

Electrochemical process of titanium extraction

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中国有色金属学会会刊：英文版 2007年第2期17卷 429-433页

作者： CH. RVs. NAGEsH C. s. RAMACHANDRAN Defence Metallurgical Research Laboratory HyderabadA.P. India-500058

A wide variety of processes are being pursued by researchers for cost effective extraction of titanium metal. Electrochemical processes are promising due to simplicity and being less capital intensive. some of the promising electrochemical processes of titanium extraction were reviewed and the results of laboratory scale experiments on electrochemical reduction of TiO2 granules were brought out. some of the kinetic parameters of the reduction process were discussed while presenting the quality improvements achieved in the experimentation.

关键词：钛萃取电化学还原过程动力学参数

study on hydrogen assisted cracking susceptibility of HsLA steel by implant test

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Defence Technology（防务技术） 2016年第6期12卷 490-495页

作者： Gopa CHAKRABORTY R. REJEEsH s.K. ALBERT Materials Technology Division Indira Gandhi Centre for Atomic Research Kalpakkam 603102 India National Institute of Technology Surathkal India

DMR-249 A is an indigenously developed high strength low alloy steel for Indian ship building industry for making ship-hull and is extensively used in the construction of war ships and submarines. Welding electrodes conforming to sFA 5.5 AWs E8018 C1 has been indigenously developed for welding of this steel using shielded metal arc welding process. In the present study, susceptibility to hydrogen assisted cracking of DMR-249 A steel welds made using this electrode has been assessed using implant test. Implant tests were conducted using this electrode at two different levels of diffusible hydrogen, measured using gas chromatography technique. It is observed that both the steel and the welding consumable are not susceptible to hydrogen assisted cracking even with a high diffusible hydrogen level of 9 m L/100 g of weld metal. In implant tests, specimen did not fracture even after loading to stress levels higher than the yield strength of the base metal. The good resistance of this steel and the welding consumable, even with high levels of diffusible hydrogen, is attributed to absence of a susceptible microstructure in both the weld metal and heat affected zone. Hence, this study shows that, in the absence of a susceptible microstructure, hydrogen assisted cracking is unlikely to occur even if hydrogen level is high. It also confirms that in welding of DMR-249 A with indigenously developed E8018 C1 electrode, hydrogen assisted cracking is not a concern and no preheating is required to avoid it during welding.

关键词： HsLA steel Hydrogen assisted cracking Diffusible hydrogen Implant test Lower critical stress

Phytotoxicity of cadmium on protein, proline and antioxidant enzyme activities in growing Arachis hypogaea L. seedlings

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Journal of Environmental sciences 2008年第2期20卷 199-206页

作者： N Dinakar P C Nagajyothi s suresh Y Udaykiran T Damodharam Department of Environmental sciences Sri Venkateswara UniversityTirupatiAndhra Pradesh-517 502India.

Phytotoxicity of cadmium on growing Arachis hypogaea L. seedlings was studied. seeds were exposed to 25, 50, and 100 μmol/L CdCl2 concentrations, for a period of 10, 15, 20 and 25 d. The extent of damage to chlorophyll, protein, proline, nitrate and nitrite reductase, antioxidant enzyme activity in leaves and roots were evaluated after 10 d of cadmium stress. The higher concentration of cadmium （100 μmol/L） resulted （leaves and roots） total chlorophyll 91.01%, protein 79.51%, 83.61%, nitrate reductase 79.39%, 80.72% and nitrite reductase 77.07%, 75.88% activity decreased with increase in cadmium concentrations and exposure periods. Cadmium caused significant changes in the activity of antioxidative enzymes. Contrastingly Cd treated plant tissues showed an increase in proline 159.87%, 239.6%, gluthion reductase （GR） 337.72%, 306.14%, superoxide disumutase （sOD） 688.56%, 381.72%, ascorbate peroxidase （APX） 226.47%, 252.14%, peroxidase （POD） 72.19%, 60.29% and catalase （CAT） 228.96%, 214.74% as compared to control. Cadmium stress caused a significant increase in the rate of sOD activity in leaves and roots of plant species. Results show the crop A. hypogaea is highly sensitive even at very low cadmium concentrations.

关键词： toxicological effects cadmium protein proline antioxidant enzymes