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1988/89年度世界烟草生产概况

世界农业 1990年第10期 23-24页

作者： k.d.sharma 赵百东

1989年世界烟叶总产比1988年有所增加,美国增加9.3万吨(约15％),达70.5万吨,主要是烤烟和白肋烟产量的增加,其种植面积增加14％,平均单产增加1％;加拿大1989年烟叶产量是7.7万吨,其中7.2万吨产自Ontario省;巴西为44万—45万吨;阿根廷为7... 详细信息

1989年世界烟叶总产比1988年有所增加,美国增加9.3万吨(约15％),达70.5万吨,主要是烤烟和白肋烟产量的增加,其种植面积增加14％,平均单产增加1％;加拿大1989年烟叶产量是7.7万吨,其中7.2万吨产自Ontario省;巴西为44万—45万吨;阿根廷为75.6万吨,增加4.6％;津巴布韦1989年种植面积为6万公顷,产量约13.5万吨,产

关键词：白肋烟种植面积美国津巴布韦播种面积美利坚合众国北美洲南罗得西亚烤烟产量烟叶产量烟草

火焰原子吸收光谱法测定硫化物矿石、精矿和其他地质样品中的钡

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地球与环境 1984年第6期 50-52页

作者： k.d.sharma 余泽宇四川省煤田地质研究所

在拉贾斯坦邦乌代普尔县附近的拉杰普拉达里巴矿,钡以重晶石（BaSO;）和毒重石（BaCO;）的形式与铅-锌矿石一起产出。利用常规泡沫浮选法除去铅和锌矿物后,尽量分选出重晶石精矿,这种精矿由于其比重很大,可以用作钻井泥浆的加重剂。用... 详细信息

在拉贾斯坦邦乌代普尔县附近的拉杰普拉达里巴矿,钡以重晶石（BaSO;）和毒重石（BaCO;）的形式与铅-锌矿石一起产出。利用常规泡沫浮选法除去铅和锌矿物后,尽量分选出重晶石精矿,这种精矿由于其比重很大,可以用作钻井泥浆的加重剂。用传统的重量法和滴定法来测定这类矿样中的钡时,铅、钙和锶干扰测定,因为这些元素也会形成不溶性硫酸盐。Heyn 和 Schupak（1954）描述了一种选择性沉淀硫

关键词：地质样品原子吸收光谱法原子吸收分光光度法火焰原子吸收法沉淀硫酸钡硫化物硫化合物矿石

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采用电解法从熔铸浮渣中回收锌粉

中国有色冶金 1986年第3期 38-40页

作者： k.d.sharma 刘志杰

锌阴极熔铸炉浮渣中的细粒级(小于74微米)含Zn约80%,可用电解锌酸钠溶液的方法呈锌粉形式回收其中的锌,回收率达75～80%,且所获得的锌粉可成功地用于湿法炼锌过程的置换除杂质。此法已经过小型和中型试验,工艺技术研究表明该法是经济的。

关键词：锌粉稀硫酸细粒级金属粉末浮渣锌酸钠

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用于35mm电影放映机的一种新型镜头

应用光学 1991年第3期12卷 16-20页

作者： Manojk.Mittal B.N.Gupta k.d.sharma 谢富能

由7个非胶合元件组成的一种新型镜头系统已经研制出来。这种新型镜头的焦距为75mm,相对孔径为 f/1.4,用于35mm 电影放映机的物镜上。为了比较该镜头系统的性能,以双高斯型镜头为基础,采用通常的设计方法,研制了一种由7个非胶合元件组成... 详细信息

由7个非胶合元件组成的一种新型镜头系统已经研制出来。这种新型镜头的焦距为75mm,相对孔径为 f/1.4,用于35mm 电影放映机的物镜上。为了比较该镜头系统的性能,以双高斯型镜头为基础,采用通常的设计方法,研制了一种由7个非胶合元件组成的系统。这种镜头的性能通过绘制象差曲线、能量分布曲线和几何 MTF 曲线进行了评定。这种新型镜头的性能优于目前使用的双高斯型镜头。

关键词：电影放映机镜头

Recovery of the injured neural system through gene delivery to surviving neurons in Parkinson’s disease

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Neural Regeneration Research 2025年第10期20卷 2855-2861页

作者： Chanchal sharma Sehwan kim Hyemi Eo Sang Ryong kim School of Life Science Kyungpook National UniversityDaeguKorea Bk21 FOUR kNU Creative BioResearch Group kyungpook National University DaeguKorea Brain Science and Engineering Institute Kyungpook National UniversityDaeguKorea

A critical unaddressed problem in Parkinson’s disease is the lack of therapy that slows or hampers *** medications effectively manage symptoms,they offer no long-term benefit because they fail to address the underlying neuronal *** highlights that the elusive goals of halting progression and restoring damaged neurons limit the long-term impact of current *** clinical trials using gene therapy have demonstrated the safety of various vector delivery systems,dosages,and transgenes expressed in the central nervous system,signifying tangible and substantial progress in applying gene therapy as a promising Parkinson’s disease ***,at diagnosis,many dopamine neurons remain in the substantia nigra,offering a potential window for recovery and *** propose that modulating these surviving dopamine neurons and axons in the substantia nigra and striatum using gene therapy offers a potentially more impactful therapeutic approach for future ***,innovative gene therapies that focus on preserving the remaining elements may have significant potential for enhancing long-term outcomes and the quality of life for patients with Parkinson’s *** this review,we provide a perspective on how gene therapy can protect vulnerable elements in the substantia nigra and striatum,offering a novel approach to addressing Parkinson’s disease at its core.

关键词： adeno-associated virus gene therapy neuroprotection neurorestoration neurotrophic factor nigrostriatal dopamine pathway pro-survival protein

Process engineering of demineralisation of moderate to high ash Indian coals through NaOH‑HCl leaching and HF leaching

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International Journal of Coal Science & Technology 2024年第2期11卷 111-122页

作者： Heena dhawan d.k.sharma ANRF Ministry of ScienceNew DelhiIndia department of Energy Science and Engineering Indian Institute of Technology DelhiNew Delhi 110016India

Chemical leaching of coals would be required to produce cleaner coals for some special applications where physical benefi-ciation may not be effective *** would also help in recovering Li and rare earth metals besides in the sequestration of CO_(2).About 20 Indian coals having complexly distributed moderate to high ash contents were sequentially treated with various alkali–acid such as NaOH-HCl,HF,HCl,HCl-HF,and NaOH-HCl-HF *** aimed to establish and design the best stepwise sequential process for the highest degree of demineralisation through a chemical leaching *** and process intensification studies were carried *** than 80%demineralisation of Madhaipur and Neemcha coals was observed using the best sequential treatment designed *** repeated stepwise treatment of the alkali and the acid was also studied,which was found to significantly enhance the degree of demineralisation of *** integrated process of alkali–acid leaching followed by solvent extraction(Organo-refining)and vice versa of the treated coal was also studied for producing cleaner coals.

关键词： Alkali–acid leaching demineralisation Integrated process Rare earth elements

Propagation of plane waves in poroviscoelastic anisotropic media

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Applied Mathematics and Mechanics(English Edition) 2008年第9期29卷 1141-1153页

作者： A.k.Vashishth M.d.sharma department of Mathematics Kurukshetra University

This study discusses wave propagation in perhaps the most general model of a poroelastic medium. The medium is considered as a viscoelastic, anisotropic and porous solid frame such that its pores of anisotropic permeability are filled with a viscous fluid. The anisotropy considered is of general type, and the attenuating waves in the medium are treated as the inhomogeneous waves. The complex slowness vector is resolved to define the phase velocity, homogeneous attenuation, inhomogeneous attenuation, and angle of attenuation for each of the four attenuating waves in the medium. A non-dimensional parameter measures the deviation of an inhomogeneous wave from its homogeneous version. An numerical model of a North-Sea sandstone is used to analyze the effects of the propagation direction, inhomogeneity parameter, frequency regime, anisotropy symmetry, anelasticity of the frame, and viscosity of the pore-fluid on the propagation characteristics of waves in such a medium.

关键词： inhomogeneous waves anisotropy poroviscoelastic solid phase velocity,attenuation

Vibration analysis of axisymmetric functionally graded viscothermoelastic spheres

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Acta Mechanica Sinica 2014年第1期30卷 100-111页

作者： d.k.sharma J.N.sharma S.S.dhaliwal V.Walia department of Mathematics Sant Longowal Institute of Engineering and Technology department of Mathematics National Institute of Technology

The present study focuses on the analysis of free vibrations of axisymmetric functionally graded hollow spheres. The material is assumed to be graded in radial di- rection with a simple power law. Matrix Frrbenious method of extended power series is employed to derive the analytical solutions for displacement, temperature, and stresses. The dispersion relations for the existence of various types of pos- sible modes of vibrations in the considered hollow sphere are derived in a compact form. In order to explore the character- istics of vibrations, the secular equations are further solved by using fixed point iteration numerical technique with the help of MATLAB software. The numerical results have been presented graphically for polymethyl methecrylate materials in respect of natural frequencies, frequency shift, inverse quality factor, displacement, temperature change, and radial stress.

关键词： Functionally graded Stresses Vibrations Fr6benius - dispersion - Spherical structures

Assessment of land use change and its effect on soil carbon stock using multitemporal satellite data in semiarid region of Rajasthan, India

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Ecological Processes 2019年第1期8卷 513-529页

作者： Garima sharma L.k.sharma k.C.sharma department of Environmental Science Central University of RajasthanNH-8BandarsindriRajasthan 305817India M.d.S.University AjmerRajasthanIndia.

Background:Land use change plays a vital role in global carbon *** land use change impact on soil carbon stock is crucial for implementing land use management to increase carbon stock and reducing carbon ***,the objective of our study was to determine land use change and to assess its effect on soil carbon stock in semi-arid part of Rajasthan,*** temporal satellite data of Pushkar valley region of Rajasthan acquired on 1993,2003,and 2014 were analyzed to assess land use *** trading of land use was depicted *** organic carbon(SOC)stock was calculated for soil to a depth of 30 cm in each land use type in 2014 using field data *** SOC stock for previous years was estimated using stock change *** effect of land use change on SOC stock was determined by calculating change in SOC stock(t/ha)by deducting the base-year SOC stock from the final year stock of a particular land use ***:The total area under agricultural lands was increased by 32.14%while that under forest was decreased by 23.14%during the time period of 1993–*** land use change shows that in both the periods(1993–2003 and 2003–2014),7%of forest area was converted to agricultural land and about 15%changes occurred among agricultural *** 1993–2003,changes among agricultural land led to maximum loss of soil carbon,i.e.,4.88 Mt C and during 2003–2014,conversion of forest to agricultural land led to loss in 3.16 Mt ***:There was a continuous decrease in forest area and increase in cultivated area in each time *** use change led to alteration in carbon equity in soil due to change or loss in ***,we can conclude that the internal trading of land use area during the 10-year period(1993–2003)led to net loss of SOC stock by 8.29 Mt ***,land use change during 11-year period(2003–2014)caused net loss of SOC by 2.76 Mt *** should be made to implement proper land

关键词： Multitemporal satellite data Land use change dynamics Internal trading of land use SOC stock,Stock change factor Change in SOC pool Land use management