维普中文期刊产品整合服务
257篇 您的检索式:作者名="Raj Kumar"
    题名 作者 年代 出处 被引量
1Anti-tumor activity of wogonin, an extract from Scutellaria baicalensis, through regulating different signaling pathways显示文摘Wogonin is a plant flavonoid compound extracted from Scutellaria baicalensis(Huang-Qin or Chinese skullcap) and has been studied thoroughly by many researchers till date for its anti-viral, anti-oxidant, anti-cancerous and neuro-protective properties. Numerous experiments conducted in vitro and in vivo have demonstrated wogonin's excellent tumor inhibitory properties. The anticancer mechanism of wogonin has been ascribed to modulation of various cell signaling pathways, including serine-threonine kinase Akt(also known as protein kinase B) and AMP-activated protein kinase(AMPK) pathways, p53-dependent/independent apoptosis, and inhibition of telomerase activity. Furthermore, wogonin also decreases DNA adduct formation with a carcinogenic compound 2-Aminofluorene and inhibits growth of drug resistant malignant cells and their migration and metastasis, without any side effects. Recently, newly synthesized wogonin derivatives have been developed with impressive anti-tumor activity. This review is the succinct appraisal of the pertinent articles on the mechanisms of anti-tumor properties of wogonin. We also summarize the potential of wogonin and its derivatives used alone or as an adjunct therapy for cancer treatment. Furthermore, pharmacokinetics and side effects of wogonin and its analogues have also been discussed.Do Luong Huynh Neelesh Sharma Amit Kumar Singh Simrinder Singh Sodhi ZHANG Jiao-Jiao Raj Kumar Mongre Mrinmoy Ghosh Nameun Kim Yang Ho Park Dong Kee Jeong 2017Chinese Journal of Natural Medicines2017,15,1:32
2Soil-Plant-Microbe Interactions in Stressed Agriculture Management:A Review显示文摘The expected rise in temperature and decreased precipitation owing to climate change and unabated anthropogenic activities add complexity and uncertainty to agro-industry. The impact of soil nutrient imbalance, mismanaged use of chemicals, high temperature,flood or drought, soil salinity, and heavy metal pollutions, with regard to food security, is increasingly being explored worldwide. This review describes the role of soil-plant-microbe interactions along with organic manure in solving stressed agriculture problems. Beneficial microbes associated with plants are known to stimulate plant growth and enhance plant resistance to biotic(diseases) and abiotic(salinity, drought, pollutions, etc.) stresses. The plant growth-promoting rhizobacteria(PGPR) and mycorrhizae, a key component of soil microbiota, could play vital roles in the maintenance of plant fitness and soil health under stressed environments. The application of organic manure as a soil conditioner to stressed soils along with suitable microbial strains could further enhance the plant-microbe associations and increase the crop yield. A combination of plant, stress-tolerant microbe, and organic amendment represents the tripartite association to offer a favourable environment to the proliferation of beneficial rhizosphere microbes that in turn enhance the plant growth performance in disturbed agro-ecosystem. Agriculture land use patterns with the proper exploitation of plant-microbe associations, with compatible beneficial microbial agents, could be one of the most effective strategies in the management of the concerned agriculture lands owing to climate change resilience. However, the association of such microbes with plants for stressed agriculture management still needs to be explored in greater depth.Shobhit Raj VIMAL Jay Shankar SINGH Naveen Kumar ARORA Surendra SINGH 2017Pedosphere2017,27,2:24
3Effect of preoperative biliary drainage on outcome of classical pancreaticoduodenectomy显示文摘AIM: To investigate the role of preoperative biliary drainage (PBD) in the outcome of classical pancreaticodu odenectomy. METHODS: A 10-year retrospective data analysis was performed on patients (n = 48) undergoing pancreaticoduodenectomy from March 1994 to March 2004 in department of surgery at SMS medical college, Jaipur, India. Demographic variables, details of preoperative stenting, operative procedure and post operative complications were noted. RESULTS: Preoperative biliary drainage was performed in 21 patients (43.5%). The incidence of septic complications was significantly higher in patients with biliary stent placement (P < 0.05, 0 vs 4). This group of patients also had a significantly higher minor biliary leak rate. Mortality and hospital stay in each group was comparable. CONCLUSION: Within this study population the use of PBD by endoscopic stenting was associated with a high incidence of infective complications. These findings do not support the routine use of biliary stenting in patients prior to pancreatico-duodenectomy.Chandra Shekhar Bhati Chandrashekhar Kubal Pankaj Kumar Sihag Ankur Atal Gupta Raj Kamal Jenav Nicholas G Inston Jagdish M Mehta 2007World Journal of Gastroenterology2007,13,8:12
4A Rapid and Sensitive One Step-SYBR Green Based Semi Quantitative Real Time RT-PCR for the Detection of peste des petits ruminants Virus in the Clinical Samples显示文摘敏感、快速的单个步实时(rt ) RT-PCR 用一步舞被标准化出众的格林·西布尔工具包吗?为 peste des petitis ruminants 病毒(PPRV ) 的察觉和 semi-quantitation 使用病毒 RNA 和矩阵(M) 蛋白质基因特定的教材并且与确定的常规 RT-PCR 和 TaqMan RT-PCR 相比。试金与 78.28 ~ 78.50 的 Tm 放大 PPRV M 基因的 124 bp 碎片。试金在到有 0.5 fg 的察觉限制(敏感) 的 0.5 fg 总数病毒 RNA 的 50 ng 的一个范围以内是线性的。基于现场稀释的 PPR 疫苗的病毒的连续冲淡,察觉限制是 0.0001 房间文化传染剂量 50% 单位(TCID50 ) 。另外,与疫苗的病毒的已知的 titre 刺的拖把材料同等地好在试金检测了。标准化 rt RT-PCR 容易在这块地和试验性的临床的样品里直接为 PPRV nucleic 酸的察觉被采用。试金从试验性的样品在拖把材料象 3 天柱子感染(dpi ) 和多达 20 dpi 一样早检测了 PPRV nucleic 酸。试金比在从 PPR 的 PPRV nucleic 酸的察觉的 TaqMan 和常规 RT-PCR 怀疑临床的样品绵羊和山羊的快速、更敏感。因此,确定的、简化 SYBR 绿 rt RT-PCR 是一种选择测试各种各样的诊断试金到已经存在并且能为有在减少污染的风险的优点的快速的临床的诊断有用。Vinayagamurthy Balamurugan Arnab Sen Gnanavel Venkatesan Vinita Yadav Vandna Bhanot Veerakyathappa Bhanuprakash Raj Kumar Singh 2012Virologica Sinica2012,27,1:10
5Tuning the particle size and morphology of high energetic material nanocrystals显示文摘Morphology controlled synthesis of nanoparticles of powerful high energetic compounds(HECs) such as l,3,5-trinitro-l,3,5-triazinane(RDX) and 1,3,5,7-tetranitro-l,3,5,7-tetrazocane(HMX) were achieved by a simple solvent—antisolvent interaction(SAI) method at 70 ℃.The effects of different solvents on particle size and morphology of the prepared nano-HECs were studied systematically.Particle size and morphology of the nano-HECs was characterized using field emission scanning electron microscopy(FE-SEM) imaging.X-ray diffraction(XRD) and Fourier transform infrared(FTIR) spectroscopy studies revealed that RDX and HMX were precipitated in their most stable polymorphic forms,i.e.a and P,respectively.Thermogravimetric analysis coupled with differential scanning calorimetry(TGA-DSC) studies showed that the thermal response of the nanoparticles was similar to the respective raw-HECs.HEC nanoparticles with spherical and rod shaped morphology were observed under different solvent conditions.The mean particle size also varied considerably with the use of different solvents.Raj KUMAR Prem Felix SIRIL Pramod SONI 2015Defence Technology(防务技术)2015,11,4:7
6Removal efficiency of fluoride by novel Mg-Cr-Cl layered double hydroxide by batch process from water显示文摘The fluoride ion removal from aqueous solution using synthesized Mg-Cr-Cl layered double hydroxide has been reported.Mg-Cr-Cl was characterized by X-ray powder diffraction,Fourier-transform infrared,thermo-gravimetric analysis,differential thermal analysis,and scanning electron microscope.Adsorption experiments were carried out in batch mode as a function of adsorption dosages,contact time,pH,and initial fluoride concentration to get optimum adsorption capacity.The adsorption kinetic study showed that the adsorption process followed first order kinetics.The fluoride removal was 88.5% and 77.4% at pH 7 with an adsorbent dose of 0.6 g/100 mL solution and initial fluoride concentration of 10 mg/L and 100 mg/L,respectively.The equilibrium was established at 40 min.Adsorption experiment data were fitted well with Langmuir isotherm with R 2 = 0.9924.Thermodynamic constants were also measured and concluded that the adsorption process was spontaneous and endothermic in nature.The removal percentage decreased slowly with increasing pH.This process is suitable for industrial effluents.The regeneration of the material is not possible.Sandip Mandal Swagatika Tripathy Tapswani Padhi Manoj Kumar Sahu Raj Kishore Patel 2013Journal of Environmental Sciences2013,25,5:7
7人工智能及其在含可再生能源电源的电网安全中的应用(英文)显示文摘文章概述了用于解决电网复杂问题的当前最高水平的人工智能技术,总结了可再生能源发电系统的发展现状,讨论了将可再生能源发电系统联接到电网中时需要考虑的几个问题。文中还较详细地讨论了近年来发生在欧美电网中的大停电事故。最后扼要介绍了一些基于人工智能的用于解决复杂问题的技术,特别是用于增强含有可再生能源发电的电网及老化电网的安全性的技术。Raj Kumar Aggarwal 2007电网技术2007,31,20:6
8Management of neglected cervical spine dislocation: a study of six cases显示文摘没有神经病学的赤字的六忽视的颈的脊骨脱臼的一个案例系列,它是管理了 operatively.MethodsThe 学习的 ObjectiveTo 报告从 2010 年 8 月被进行到 2011 年 12 月,案例从医药教育和研究的研究生研究所的门诊部被选择,印度。病人在 30 ~ 50 年的年龄组。所有病人经由前面、以后的 approaches.ResultsDuring 被操作立即的手术后的时期,五(83.33%) 病人们有正常神经病学的地位。有 C 5-C6 subluxation 的(16.67%)病人在在更低的手足的 2/5 和在在 C 6 level.ConclusionThere 下面的上面的手足的 3/5 的水平和马达功率是的 C 6下面与感觉损失开发了神经病学的赤字在对颈的脊骨的忽视的分散注意力的屈曲损害的颅骨拖拉的角色都没为更多推迟比 3 个星期。以后由前面的途径列在后面节省许多时间。如果两条途径将在一样的坐被做,其次地对乐器学没有需要。但是如果上演过程是 planed,以后的稳定被推荐,,有在神经病学的地位的恶化的风险。Vijay Goni Nirmal Raj Gopinathan Vibhu Krishnan Rajesh Kumar Avinash Kumar 2013Chinese Journal of Traumatology2013,16,4:6
9Higher frequency of Yq microdeletions in sperm DNA as compared to DNA isolated from blood显示文摘瞄准:决定删除的 Yq 微删除频率和 loci 是否在不同胚胎学的起源的二纸巾(血和精子) 是类似的。方法:现在的学习包括了 52 个不肥沃的 oligozoospermic 盒子。在每种情况中, DNA 从血和精子被孤立,微删除分析从 genomic DNA 被做的聚合酶链反应(PCR ) 从两个孤立纸巾。PCR 产品在 1.8% 统帅玫瑰胶化上被分析。发现否定的 PCR 扩大被重复至少三次证实一个给定的标记的删除。结果:仅仅 1 个盒子在血 DNA 怀有微删除,而 4 个盒子在精子 DNA 怀有微删除。结论:Yq 微删除的频率作为与血相比在细菌房间是更高的。为帮助繁殖生产技术(艺术) 作为不肥沃的夫妇的多数抉择, Yq 微删除从细菌房间屏蔽是重要的理解不孕的基因基础,提供全面建议和大多数改编治疗学给不肥沃的夫妇。Rima Dada Rakesh Kumar M. B. Shamsi Rajeev Kumar Kiran Kucheria Raj K. Sharma Satish K. Gupta Narmada P. Gupta 2007Asian Journal of Andrology2007,9,5:6
10Study on Passive Immunity:time of Vaccination in Kids Born to Goats Vaccinated Against Peste des petits ruminants显示文摘In this study,the decay of maternal peste des petits ruminants virus(PPRV) antibodies in kids born to goats vaccinated with Asian lineage IV PPR vaccine and the efficacy of passive immunity against PPRV was assessed to determine the appropriate period for vaccination in kids.Serum samples collected from kids born to vaccinated,unvaccinated and infected goats at different time intervals were tested by PPR competitive ELISA and serum neutralization test(SNT).Maternal antibodies in kids were detectable up to 6 months with a decline trend from the third month onwards and receded below the protective level by the fourth month.The kid with an SN titre of 1:8 at the time of immunization showed significant PPRV specific antibody response(percentage inhibition of 76;SN titers >1:16),when tested on 21 day post-vaccination and was completely protected from infection upon virulent PPRV challenge.Similarly,the kid with 1:8 SN titers was completely protected from PPR infection on active challenge.Therefore,PPR vaccination is recommended in kids,aged 4 months and born to immunized or exposed goats.This could be a suitable period to avoid window of susceptibility in kids to PPRV and the effort to eliminate PPR infection from susceptible populations.Vinayagamurthy Balamurugan Arnab Sen Gnanavel Venkatesan Kaushal Kishor Rajak Veerakyathappa Bhanuprakash Raj Kumar Singh 2012Virologica Sinica2012,27,4:5
11Steroid hormone receptors and prostate cancer: role of structural dynamics in therapeutic targeting显示文摘类固醇荷尔蒙受体(SHR ) 通过和 coregulatory 蛋白质的相互作用在类型特定的房间和基因特定的举止行动在基因规定的水平调整众多的生理、病理学的过程。allosteric 在 SHR 改变在目标基因的表达式上施加积极或否定的效果的 ligand 导致的类固醇受体调节的人(SRM ) 的绑定。到期部分地,到事实,那当前的 SRM 通常指向 ligand 有约束力的域(LBD )/AF2 和疏忽内在地混乱(标志)N 终端域(NTD )/AF1,临床上相关的 SRM 缺乏选择并且随着时间的过去对电阻的开发也敏感。因此,最大化基于 SHR 的治疗学的功效,开发行动控制 AF1 活动的唯一的调节的人的可能性必须被考虑。为阉割抵抗的前列腺癌症的最近的研究指向雄激素受体(艺术) 标志 AF1 领域提供了治疗学地由 allosteric 调整指向标志 NTD/AF1 表面完成需要的效果的可能性。在这篇评论文章,我们讨论怎么内部 -- 并且分子的 allosteric 规定特别地由艺术结构的灵活性和动力学控制了的 intra- ID NTD/AF1 是调查的一个新兴的区域,它能为药开发并且前列腺癌症的治疗学的指向被利用。Raj Kumar 2016Asian Journal of Andrology2016,18,5:4
12Antibacterial activity of some actinomycetes from Tamil Nadu,India显示文摘Objective:To isolate novel actinomycetes and to evaluate their antibacterial activity.Methods:Three soil samples were collected from Vengodu(village)in Kanchipuram district,Tamil Nadu,India.Actinomycetes were isolated using serial dilution and plating method on actinomycetes isolation agar.Results:Totally 35 isolates were obtained on the basis of colony characteristics on actinomycetes isolation agar.All the isolates were screened for antibacterial activity by cross streak method.Medium and optimization of day were done for the potent strains using Nathan's agar well diffusion method.Isolation of bioactive compounds from significant active isolates was done by using different media.The most active isolate VAS 10 was identified as Actinobacterium Loyola PBT VAS 10(accession No.JF501398)using 16s rRNA sequence method.The hexane,ethyl acetate,dichloromethane and butanol extracts of VAS 10 were tested against bacteria.The maximum antibacterial activity was observed in dichloromethane and ethyl acetate;maximum zones of inhibition were observed against Enterococcus durans.The rRNA secondary structure and the restriction sites of Actinobacterium Loyola VAS 10 were predicted using Genebee and NEBCutter online tools respectively.Conclusions:The present study showed that among the isolated actinomycetes,Actinobacterium Loyola PBT VAS 10(accession No.JF501398)showed good antibacterial activity against the tested bacteria.Pachaiyappan Saravana Kumar John Poonga Preetam Raj Veeramuthu Duraipandiyan Savarimuthu Ignacimuthu 2012Asian Pacific Journal of Tropical Biomedicine2012,2,12:4
13Assessment of performance,combustion and emissions characteristics of methanol-diesel dual-fuel compression ignition engine:A review显示文摘The energy security concern and rapidly diminishing fossil fuel resources demand the development of renewable and economically attractive fuel for reciprocating engines.Methanol is a promising renewable alternative fuel.Numerous studies have been carried out to explore the various aspects of the utilization of methanol in compression ignition(CI)engine.This review paper presents a detailed analysis of the effect of methanol on performance,combustion,and emission(NOx,CO,HC,and soot)characteristics of conventional CI-engine along with dual-fuel combustion mode.This study focuses on methanol utilization in dual-fuel mode,which is an advanced engine combustion mode.First,methanol production and solubility issues of methanol in diesel are briefly discussed.This study discusses the soot and nano-particle emission from the methanol fueled CI-engine,which is one of the main concerns in the current emission legislation.It was found that the utilization of methanol in CI-engine has the potential to improve the performance and simultaneously with a significant reduction in NOx,CO,soot,and nano-particle emissions in comparison to neat diesel operation.However,unburnt HC emission reduces for methanol-diesel blended fuel operation whereas HC emissions are higher for methanoldiesel dual-fuel operation.Mohit Raj Saxena Rakesh Kumar Maurya Prashant Mishra 2021Journal of Traffic and Transportation Engineering(English Edition)2021,8,5:4
14Detection of Bluetongue Virus Group-specific Antigen Using Monoclonal Antibody Based Sandwich ELISA显示文摘A monoclonal antibody (MAb) specific for the bluetongue virus (BTV) group specific antigen (VP7) was characterized for its reactivity with purified virus and recombinant BTV VP7 (rVP7) protein and its suitability for use in the sandwich ELISA.The MAb,designated as 5B5 was specific to VP7 and belongs to IgG2a subclass and was selected for the development of the sELISA in this study.The MAb had a titer of 1:25 with BTV and 1:2 with the rVP7 protein.The sELISA is based on capturing of BTV antigen with VP7 specific MAb followed by detection using BTV polyclonal antiserum raised in rabbits.The assay was evaluated with six cell culture adapted serotypes of BTV that have been isolated from India,1,2,15,17,18 and 23.The assay could detect BTV antigen as early as day 8 in blood.It was also successfully applied for the detection of BTV group specific antigen in clinical samples of blood,washed RBCs,buffy coat and plasma.A total of 102 field samples from animals,suspected of being infected with BTV,were tested and 29.42% were positive.The blood samples were also amplified in cell culture which improved the sensitivity of the assay.Results confirmed that the sELISA is rapid and specific.Pradeep Narayan Gandhale Veerakyathappa Bhanuprakash Vinayagamurthy Balamurugan Madhusudhan Hosamani Gnanavel Venkatesan Raj Kumar Singh 2010Virologica Sinica2010,25,6:4
15Climate change effects in the Western Himalayan ecosystems of India: evidence and strategies显示文摘Background: The fragile landscapes of the Himalayan region are highly susceptible to natural hazards, and there is ongoing concern about current and potential climate change impacts. This study provides background information on India's Western Himalayas and reviews evidence of warming as well as variability in precipitation and extreme events.Methods: Understanding and anticipating the impacts of climate change on Himalayan forest ecosystems and the services they provide to people are critical. Efforts to develop and implement effective policies and management strategies for climate change mitigation and adaptation requires particular new research initiatives. The various studies initiated and conducted in the region are compiled here.Results: Several new initiatives taken by the Himalayan Forest Research Institute in Shimla are described. This includes new permanent observational field studies, some with mapped trees, in high altitude transitional zones for continuous monitoring of vegetation response. We have also presented new strategies for mitigating potential climate change effects in Himalayan forest ecosystems.Conclusions: Assessment of the ecological and genetic diversity of the Himalayan conifers is required to evaluate potential responses to changing climatic conditions. Conservation strategies for the important temperate medicinal plants need to be developed. The impact of climate change on insects and pathogens in the Himalayas also need to be assessed. Coordinated efforts are necessary to develop effective strategies for adaptation and mitigation.Vindhya Prasad Tewari Raj Kumar Verma Klaus von Gadow 2017Forest Ecosystems2017,4,3:4
16Novel chemical scaffolds of the tumor marker AKRIBIO inhibitors discovered by 3D QSAR pharmacophore modeling显示文摘目的: 最近的证据建议 aldo-keto reductase 家庭 1 B10 (AKR1B10 ) 可以是禁止者为人的癌症的许多类型的治疗为一种有希望的选择提供的人的肿瘤,和那 AKR1B10 的一个潜在的诊断或预示的标记。这研究的目的是识别在 silico 途径使用的 AKR1B10 禁止者的新奇化学脚手架。Raj KUMAR Minky SON Rohit BAVI Yuno LEE Chanin PARK Venkatesh ARULALAPPERUMAL Guang Ping CAO Hyong-ha KIM Jung-keun SUH Yong-seong KIM Yong Jung KWON Keun Woo LEE 2015Acta Pharmacologica Sinica2015,36,8:4
17Steroid resistance in leukemia显示文摘There are several types of leukemia which are characterized by the abnormal growth of cells from the myeloid or lymphoid lineage. Because of their lympholytic actions, glucocorticoids(GCs) are included in many therapeutic regimens for the treatment of various forms of leukemia. Although a significant number of acute lymphoblastic leukemia patients respond well to GC treatment during initial phases; prolonged treatments sometimes results in steroid-resistance. The exact mechanism of this resistance has yet not been completely elucidated, but a correlation between functional GC receptor expression levels and steroidresistance in patients has been found. In recent years, several other mechanisms of action have been reported that could play an important role in the development of such drug resistances in leukemia. Therefore, a better understanding of how leukemic patients develop drug resistance should result in drugs designed appropriately to treat these patients.Darshan S Shah Raj Kumar 2013World Journal of Experimental Medicine2013,3,2:4
18Binding interaction of phosphorus heterocycles with bovine serum albumin:A biochemical study显示文摘Interaction between bovine serum albumin(BSA) and phosphorus heterocycles(PHs) was studied using multispectroscopic techniques. The results indicated the high binding affinity of PHs to BSA as it quenches the intrinsic fluorescence of BSA. The experimental data suggested the fluorescence quenching mechanism between PHs and BSA as a dynamic quenching. From the UV–vis studies, the apparent association constant(K_(app)) was found to be 9.25×10~2, 1.27×10~4and 9.01×10~2L/mol for the interaction of BSA with PH-1, PH-2 and PH-3,respectively. According to the F?rster's non-radiation energy transfer(FRET) theory, the binding distances between BSA and PHs were calculated. The binding distances(r) of PH-1, PH-2 and PH-3 were found to be2.86, 3.03, and 5.12 nm, respectively, indicating energy transfer occurs between BSA and PHs. The binding constants of the PHs obtained from the fluorescence quenching data were found to be decreased with increase of temperature. The negative values of the thermodynamic parameters ΔH, ΔS and ΔG at different temperatures revealed that the binding process is spontaneous; hydrogen bonds and van der Waals interaction were the main force to stabilize the complex. The microenvironment of the protein-binding site was studied by synchronous fluorescence and circular dichroism(CD) techniques and data indicated that the conformation of BSA changed in the presence of PHs. Finally, we studied the BSA-PHs docking using Auto Dock and results suggest that PHs is located in the cleft between the domains of BSA.Swarup Roy Raj Kumar Nandi Sintu Ganai K.C. Majumdar Tapan K. Das 2017Journal of Pharmaceutical Analysis2017,7,1:4
19Long-Term Conservation Agriculture and Intensified Cropping Systems:Effects on Growth,Yield,Water,and Energy-use Efficiency of Maize in Northwestern India显示文摘Conservation agriculture(CA)-based best-bet crop management practices may increase crop and water productivity, while conserving and sustaining natural resources. We evaluated the performance of rainy season maize during 2014 under an ongoing long-term trial(established in 2008) with three tillage practices, i.e., permanent bed(PB), zero tillage(ZT), and conventional tillage(CT) as main plots, and four intensified maize-based cropping systems, i.e., maize-wheat-mungbean, maize-chickpea-Sesbania(MCS), maizemustard-mungbean, and maize-maize-Sesbania) as subplot treatments. In the seventh rainy season of the experiment, maize growth parameters, yield attributes, yield, and water-and energy-use efficiency were highest at fixed plots under ZT. Maize growth parameters were significantly(P < 0.05) superior under ZT and PB compared with CT. Maize yield attributes, including cobs per m^2(7.8), cob length(0.183 m), grain rows per cob(13.8), and grains per row(35.6), were significantly higher under ZT than CT; however, no significant effect of cropping systems was found on maize growth and yield attributes. Zero tillage exhibited the highest maize productivity(4 589 kg ha^(-1)). However, among the cropping systems, MCS exhibited the highest maize productivity(4 582 kg ha^(-1)). In maize, water use was reduced by 80.2–120.9 mm ha-1under ZT and PB compared with CT, which ultimately enhanced the economic water-use efficiency by 42.0% and 36.6%, respectively. The ZT and PB showed a 3.5%–31.8% increase in soil organic carbon(SOC) at different soil depths(0–0.45 m), and a 32.3%–39.9% increase in energy productivity compared with CT. Overall, our results showed that CA-based ZT and PB practices coupled with diversified maize-based cropping systems effectively enhanced maize yield and SOC,as well as water-and energy-use efficiency, in northwestern India.Chiter M.PARIHAR Malu R.YADAV Shankar L.JAT Aditya K.SINGH Bhupender KUMAR Vijay POONIYA Sanatan PRADHAN Rakesh K.VERMA Mangi L.JAT Raj K.JAT Muli D.PARIHAR Hari S.NAYAK Yashpal S.SAHARAWAT 2018Pedosphere2018,28,6:3
20基于遥感影像的甘达基流域博卡拉和巴拉普尔的土地利用变化及其驱动力研究(英文)显示文摘城市扩张是反映经济增长的重要指标,但随意的城市扩张也带来了严重的社会经济问题、环境问题以及城市土地管理问题。在这个背景下,理解城市扩张的过程对于指导城市的可持续增长具有重要意义。本研究采用基于遥感影像的监督分类方法,分析了甘达基流域内的两个大城市—博卡拉和巴拉普尔1990–2018年的城市用地变化。结果表明:在过去的28年,博卡拉和巴拉普尔的城市面积分别显著扩张了300%和近500%。人口增长、城市基础设施和便利的生活方式引起周边地区向城市的人口迁移,是造成本研究区城市扩张的主要原因。除此之外,不断变化的城市定义和城市边界的扩张是造成城市快速扩张的关键因素。由于上述两个城市拥有高水平的商业活动以及现代化的设施,未来城市规模可能继续扩大。应当通过城市规划和政策减少随意的城市扩张,从而实现城市的可持续发展。Raju RAI 张镱锂 Basanta PAUDEL Narendra Raj KHANAL Bipin Kumar ACHARYA 2020Journal of Resources and Ecology2020,11,1:3
返回顶部 每页显示:
共13页 首页 上一页 第1页 下一页 末页 /13 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费