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Contrasting REE Signatures on Manganese Ores of Iron Ore Group in North Orissa, India

Journal of Rare Earths 2007年第6期25卷 749-758页

作者： p.p.Mishra B.K.Mohapatra p.p.singh Institute of Minerals and Materials Technology Bhubaneswar 751013 India post Graduate Department of Geology Utkal University Bhubaneswar 751004 India

The distribution pattern of Rare Earth Elements （REE） in three categories of manganese ores viz. stratiform, stratabound-replacement, and detrital of precambrian Iron Ore Group from north Orissa, India was reported. These categories of Mn-ore differed in their major and trace chemistry and exhibited contrasting REE signature. The stratiform ores were relatively enriched in ∑REE content （697 μg·g^-1） and their normalized pattern showed both positive Ce and Eu anomalies, whereas the stratabound-replacement types were comparatively depleted in ∑REE content （211 μg·g^-1） and showed negative Ce and flat Eu signatures. The detrital categories showed mixed REE pattern. The data plotted in different discrimination diagrams revealed a mixed volcaniclastic and chemogenic source of material for stratiform categories, and LREE （Light Rare Earth Elements） and HREE （Heavy Rare Earth Elements） are contributed by such sources, respectively. In contrast, the stratabound ore bodies were developed during the remobilization of stratiform ores, and associated Mncontaining rocks under supergene condition followed by the redeposition of circulating mineralized colloidal solutions in structurally favorable zones. During this process, some of the constituents were found only in very low concentration within stratabound ores, and this is attributed to their poor leachability/mobility. The detrital ores did not exhibit any significant characteristic in respect of REE as their development was via a complex combination of processes involving weathering, fragmentation, recementation, and burial under soil cover.

关键词： manganese ore REE normalization geochemistry Bonai-Keonjhar belt Orissa rare earths

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行距和去叶对甘蔗的影响

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甘蔗糖业 1987年第6期 52-54页

作者： S.C.singh p.p.singh 黄惠恩印度pantnagar 农艺大学农学系

1977/78年在印度 pantnagar 作物研究中心以随机区组设计,重复四次,进行包括两种行距(60和90厘米)和五种去叶处理(0、25%、50%、75%和100%)的田间试验,以研究去叶能否避免倒伏而不降低产糖量。试验结果表明,去叶达75%处理的产蔗量和产... 详细信息

1977/78年在印度 pantnagar 作物研究中心以随机区组设计,重复四次,进行包括两种行距(60和90厘米)和五种去叶处理(0、25%、50%、75%和100%)的田间试验,以研究去叶能否避免倒伏而不降低产糖量。试验结果表明,去叶达75%处理的产蔗量和产糖量都没很大变化,但超过此限度的产量和蔗汁品质则明显降低。用去叶的方法可以避免甘蔗倒伏。

关键词：去叶锤度程度除叶行距甘蔗糖料作物

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甘蔗种植密度与施氮水平的研究

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甘蔗糖业 1984年第8期 51-54页

作者： p.p.singh S.K.Saini KamleshKumar 关中秀

pantnagar,Nainital 的 GovindBallabh pant 农业技术大学的作物研究中心,在1975—1976年进行大田试验中找出甘蔗需氨量与植株群体之间的关系。甘蔗的种植密度在60厘米行距较密的情况下比种植密度在90厘米行距较疏的情况下需要更多的氮... 详细信息

pantnagar,Nainital 的 GovindBallabh pant 农业技术大学的作物研究中心,在1975—1976年进行大田试验中找出甘蔗需氨量与植株群体之间的关系。甘蔗的种植密度在60厘米行距较密的情况下比种植密度在90厘米行距较疏的情况下需要更多的氮。行距为60厘米的甘蔗种植规格每公顷施75公斤氮,比不施氮和施37.5公斤氮分别每公顷蔗茎产量增加16.82吨和9.66吨。而在90厘米行距中每公顷仅分别增加8.95和6.22吨。1976年在60厘米行距情况下,每公顷150公斤施氮水平比75公斤施氮水平的蔗茎产量每公顷增加4.38吨,而在90厘米行距情况下,其产量的增加却是微不足道的(1.38吨/公顷)。

关键词：施氮水平行距蔗茎产量甘蔗糖料作物密度

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在印度北部条件下,栽培方法和行距密度与迟植甘蔗的关系

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甘蔗糖业 1982年第9期 45-48页

作者： p.p.singh S.K.Saini O.p.Mishra T.p.singh 黄惠恩印度pantnagar G.B.pant农业技术大学

于1976、77和78年间,Nagina(印度北部)地区研究所在pantnagar ***农业技术大学的直接指导下,采用有4个重复的随机区组设计,连续进行了三年田间试验,对比现行的催芽育苗和未萌芽种苗普通平植法,以评价'立植法'。三年所记录的观察结果表... 详细信息

于1976、77和78年间,Nagina(印度北部)地区研究所在pantnagar ***农业技术大学的直接指导下,采用有4个重复的随机区组设计,连续进行了三年田间试验,对比现行的催芽育苗和未萌芽种苗普通平植法,以评价'立植法'。三年所记录的观察结果表明,'立植法'所获得的甘蔗产量高于采用未萌芽种苗平放种植的,但低于催芽育苗平植的,由于较窄的行距每单位土地面积能保持较高的蔗株群体而获得较高产量。采用'立植法'和催芽育苗平植法较采用未萌芽种苗平植法每公顷分别增产21.84吨和26.30吨,行距60厘米较窄的种植比行距90厘米较宽的种植增产19.50%。

关键词：行距种植方法原料蔗密度栽培方法甘蔗产量

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Hydrothermal treatment of pearl millet grains:Effects on nutritional composition,antinutrients and flour properties

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Grain & Oil Science and Technology 2024年第2期7卷 87-95页

作者： p.prashanth T.Jayasree Joshi Shagolshem Mukta singh p.Srinivasa Rao Agricultural and Food Engineering Department Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India

pearl millet(pennisetum glaucum)is one of the major millets with high nutritional *** crop exhibits exceptional resilience to drought and high ***,the processing of pearl millet poses a significant challenge due to its high lipid content,enzyme activity,and presence of ***,it becomes imperative to enhance the quality and prolong the shelf life of pearl millet flour by employing suitable *** treatment in the food industry has long been seen as promising due to its potential to reduce microbial load,inactivate enzymes,and improve nutrient *** study aims to investigate the effects of hydrothermal treatment on the quality characteristics of pearl *** independent variables of the study were soaking temperature(35,45,55℃),soaking time(2,3,4 h),and steaming time(5,10,15 min).Treatment conditions had a statistically significant effect on nutrient *** antinutrients like tannins and phytates were reduced by 0.99% to 5.94% and 0.36% to 6.00%,respectively,after the *** activity decreased significantly up to 10% with the treatment *** findings of this study could potentially encourage the use of pearl millet flour in the production of various food items and promote the application of hydrothermal treatment in the field of food processing.

关键词： pearl millet Hydrothermal treatment Nutritional properties Antinutrients

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Technological advancements in millet dehulling and polishing process: An insight into pretreatment methods, machineries and impact on nutritional quality

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Grain & Oil Science and Technology 2024年第3期7卷 186-195页

作者： Shagolshem Mukta singh Jayasree Joshi T p.Srinivasa Rao Agricultural and Food Engineering Department Indian Institute of Technology Kharagpur

Millets are widely recognized for their nutritional significance; however, the methods employed for their processing are currently lacking. This article primarily focuses on the advanced technologies and progressions in millet dehulling and polishing. These technologies operate based on the fundamental principles of compression-shearing, abrasion-friction, and centrifugal-impact forces. processing of millets can be challenging because of the physical characteristics and tight attachment of hull and bran to the endosperm. However, several dehullers have been designed to solve this problem for different kinds of millets. In addition, the nutritional and anti-nutritional characteristics undergo alterations due to both dehulling and polishing processes. These alterations are thoroughly examined and discussed in this article. Specifically, anti-nutrients such as tannins and phytate are predominantly found in the outer pericarp of the grain and experience a reduction after undergoing dehulling and polishing. The nutritional properties are also subjected to a reduction; however, this reduction can be mitigated by subjecting the grains to certain pretreatments before dehulling and polishing. These treatments serve to enhance dehulling efficiency and nutrient digestibility while simultaneously reducing the presence of anti-nutrients. Novel thermal and non-thermal methodologies such as microwave, hydrothermal, high-pressure processing, and ohmic heating can be employed for processing millets, thereby diminishing the loss of nutrients. Additional research can be carried out to investigate their impact on the dehulling and polishing of millets.

关键词： Dehulling Millets Novel thermal and non-thermal techniques polishing pretreatment

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Laser-induced graphene-coated wearable smart textile electrodes for biopotentials signal monitoring

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Frontiers of Materials Science 2024年第1期18卷 95-111页

作者： C.M.Vidhya Yogita Maithani Sakshi Kapoor J.p.singh Department of physics Indian Institute of Technology DelhiHauz KhasNew Delhi 110016India

This paper describes how to produce a wearable dry electrode at a reasonable cost and how to use it for the monitoring of biopotentials in *** textiles in wearable technologies have made a great advancement in the health care management and living standards of *** was manufactured using the low-cost single-step process,laser ablation of polyimide,a commercial *** dispersions were made using solvent isopropyl alcohol which has low boiling point,nontoxicity,and environmental *** successive coating of the graphene dispersion on the cotton fabric to make it conductive,the sheet resistance of the resulting fabric dropped to 3% of its initial *** laser-induced graphene(LIG)cotton dry electrodes thus manufactured are comparable to Ag/AgCl wet electrodes in terms of the skin-to-electrode impedance,measuring between 78.0 and 7.2 kΩ for the frequency between 40 Hz and 1 *** LIG cotton electrode displayed a signal-to-noise ratio of 20.17 *** to its comfort,simplicity,and good performance over a longer period of time,the textile electrode appears suited for medical applications.

关键词： biopotential electrocardiogram electromyogram flexible electrode textile porous graphene

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Constraining the variable generalized Chaplygin gas model in matter creation cosmology

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Communications in Theoretical physics 2024年第10期 121-136页

作者： Yogesh Bhardwaj C p singh Department of Applied Mathematics Delhi Technological University

We explore the variable generalized Chaplygin gas（VGCG） model in the theory of matter creation cosmology within the framework of a spatially homogeneous and isotropic flat Friedmann—Lemai tre—Robertson—Walker space-time. Matter creation cosmology is based on reinterpretation of the energy–momentum tensor in Einstein's field equations. This creation corresponds to an irreversible energy flow from the gravitational field to the created matter constituents. The variable Chaplygin gas（VCG） is also studied as a particular solution. We use the Markov chain Monte Carlo method to constrain the free parameters of three models, namely,Lambda-Cold-Dark matter（ΛCDM）, VGCG and VCG models with and without matter creation from the latest observational data from baryon acoustic oscillations, cosmic chronometer, type Ia supernovae（pantheon） including gamma-ray bursts, quasars and the local measurement of H0from R21 data. Two different combinations of dataset provide a fairly tight constraint on the parameters of the ΛCDM, VGCG and VCG models. The present values of various cosmological parameters are obtained, which are very close to the ΛCDM model. Furthermore, we perform stability analysis, Bayesian evidence analysis and information criteria analysis for these models through studying the sound speed, Bayes factor, and Akaike information criteria（AIC） and Bayesian information criteria（BIC） selection criteria. The values of sound speed for VGCG and VCG models shows that both the models are stable. According to AIC, it is observed that VGCG and VCG models with matter creation are supported considerably less by current observations,while BIC shows that these models are not favoured by observational data.

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The Limbal Niche and Its Role in Maintaining Corneal Regeneration

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Open Journal of Ophthalmology 2024年第1期14卷 76-91页

作者： Jaysukh p. singh Syosset Senior High School Syosset New York USA

In recent years, stem cells have been a focal point in research designed to evaluate the efficacy of ophthalmologic therapies, specifically those for corneal conditions. The corneal epithelium is one of the few regions of the body that maintains itself using a residual stem cell population within the adjacent limbus. Stem cell movement has additionally captivated the minds of researchers due to its potential application in different body regions. The cornea is a viable model for varying methods to track stem cell migratory patterns, such as lineage tracing and live imaging from the limbus. These developments have the potential to pave the way for future therapies designed to ensure the continuous regeneration of the corneal epithelium following injury via the limbal stem cell niche. This literature review aims to analyze the various methods of imaging used to understand the limbal stem cell niche and possible future directions that might be useful to consider for the better treatment and prevention of disorders of the cornea and corneal epithelium. .

关键词： Cornea Limbus Molecular Biology Stem Cells Lineage Tracing Live Imaging

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Influence of cerium ions on structure-dependent magnetic properties of Ba-Sr M-type hexaferrite nanocrystals

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Journal of Rare Earths 2024年第2期42卷 364-372,I0005页

作者： Ram A.pawar Sunil M.patange p.M.Dighe Sher singh Meena Abdullah GAl-Sehemi Mehboobali pannipara Santosh S.Jadhav Department of physics ArtsCommerce and Science CollegeAhmednagar413711MaharashtraIndia Department of physics Shri Krishna MahavidyalayaGunjotiDistOsmanabad413606MaharashtraIndia padmashri Vikhe patil College of Arts Science and CommercePravaranagarA/P.Loni(Kd)Tal.RahataDistAhmednagar413713MaharashtraIndia Solid State physics Division Bhabha Atomic Research CentreMumbai400085MaharashtraIndia Department of Chemistry King Khalid UniversityAbha61413Saudi Arabia Department of physics D.S.M's ArtsCommerce and Science CollegeJintur431509MaharashtraIndia

The present study is a systematic effort to investigate the structure-sensitive magnetic parameters of Ce^(3+) substituted Ba-Sr hexaferrite nanocrystals chemically formulated as Ba_(0.5)Sr_(0.5)Ce_(x)Fe_(12-x)O_(19) where x=0.0-0.2 with Δx=*** hexaferrite powders were prepared using the sol-gel self-ignition route and structurally characterized by means of powder X-ray diffraction and Fourier transform infrared *** creation of the M-type hexaferrite phase within the synthesized samples was revealed from the Rietveld refinement of the X-ray *** occurrence of a secondary phase of CeO_(2) was revealed within the hexaferrites for the substitution,x> *** refined X-ray diffraction data were utilized to compute the lattice parameters,X-ray density,and lattice parameter *** crystal structure plotted from the refined XRD data reveals the occupancy of the ions at different lattice *** XpS data of the hexaferrite were analyzed to confirm the oxidation states of the constituent *** nanocrystalline nature of the hexaferrites was revealed from the crystallite sizes calculated using Scherer's *** analysis of FTIR spectra confirms that only a fraction of Ce^(3+)accommodated in the lattice and the remaining Ce content reside in the form of the CeO_(2) *** morphology of the hexaferrites was analyzed from the FESEM profiles of the ferrite *** magnetic behavior study was performed by analyzing the Curie temperature,hysteresis loops,and hyperfine interactions by means of susceptibility,V.S.M,and Mossbauer spectroscopy,*** hexaferrites with increasing coercivity,decreasing saturation magnetization,and decreasing Curie temperature are reported in the *** substituted Ce^(3+)ions inhibit the grain growth and create lattice imperfections giving rise to hexaferrites with tuned magnetic parameters suitable for different applications.

关键词： Ba-Sr hexaferrite Ce^(3+)substitution XpS Saturation magnetization Coercivity M?ssbauer spectroscopy

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