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An improvised in vitro vegetative propagation technique for Bambusa tulda： influence of season, sterilization and hormones

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Journal of Forestry Research 2018年第4期29卷 1059-1064页

作者： Deepti Bhadrawale Jay prakash Mishra Yogeshwar Mishra Tropical Forest Research Institute P.O.-R.F.R.C. Mandla Road Jabalpur Madhya Pradesh 482021 India

Season and concentration of sterilizing agents play a significant role for establishment of aseptic in vitro shoot cultures and sprouting of nodal explants from field growing culms of bamboo species. In the present investigation the nodal segment explants of Bambusa tulda Roxb collected in different seasons and treated with various concentrations of HgC12 showed significant variation in aseptic culture establishment and bud break. The rainy season （July-August） recorded with highest of 78% aseptic culture establishment whereas autumn recorded with lowest 46%. Summer and winter seasons emerged to be the best period, registering 〉 60% in vitro bud break. On the other hand, the autumn season had the lowest value for bud break, i.e. 42%. Among different doses of sterilizing agent tried, HgC12 0.1% found to be suitable for maximum aseptic culture establishment （66%） as well as bud break （59%）. However, among the interactions, summer season and the dose of 0.1% HgC12 exhibited maximum of 73% response for both aseptic culture establishment and bud break. MS medium （liquid） enriched with 5.0 μM BA ＋5.0 μM Kn [Kinetin （N6-Furfuryladenine）] with additional supplementation of 100 μM glutamine ＋ 0.1 μM IAA supported a maximum in vitro shoot multiplication of 4.75 fold. The proliferated shoots were successfully rooted on MS medium （liquid） supplemented 40 μM coumarin. The plantlets transferred to the polythene bags showed 98% survival.

关键词： Aseptic culture Bambusa tulda Roxb Bud sprouting Season

Towards the development of cavitation technology for upgrading bitumen： Viscosity change and chemical cavitation yield measurements

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Petroleum Science 2017年第2期14卷 404-411页

作者： Deepak M. Kirpalani Dipti prakash Mohapatra Energy Mining and Environment Portfolio National Research Council of Canada 1200 Montreal Road Ottawa ON K1A 0R6 Canada

Among the different methods used for reducing viscosity of bitumen,acoustic cavitation during sonication is well *** chemical methods were used to detect the production of reactive species such as hydroxyl radicals and hydrogen peroxide during acoustic cavitation ***,quantification of cavitation yield in sonochemical systems is generally limited to low frequencies and has not been applied to bitumen *** empirical determination of the cavitation yield in midto high-frequency range（378,574,850,992,and1173 k Hz）was carried out by measuring the amount of iodine liberated from the oxidation of potassium iodide（KI）.Further,cavitation yield and the effects of different sonic operating conditions such as power input（16.67%–83.33%）and solute concentration on cavitation yield were carried out in KI solution and sodium carboxymethyl cellulose–water mixture to obtain benchmark changes in rheology and chemistry using these two model *** findings were then applied to bitumen upgrading through *** this study,it was found that the chemical cavitation yield peaked with a sonication frequency of 574 k *** was also found that cavitation yield and viscosity change were correlated directly in bitumen and a 38%lower bitumen viscosity could be obtained by acoustic cavitation.

关键词： Bitumen Cavitation yield CMC-water KI solution Viscosity correlation

Petrogenesis of the Borjuri diorite pluton in the Mikir Massif of Northeast India:implications for post-collisional intermediate magmatism during the Pan-African orogeny

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Acta Geochimica 2023年第4期42卷 747-764页

作者： Tribujjal prakash Ashima Saikia Pallabi Basumatary Bibhuti Gogoi Department of Geology Cotton UniversityGuwahatiAssam 781001India Department of Geology University of DelhiDelhi 110007India

The Assam-Meghalaya Gneissic Complex(AMGC)of northeast India contains numerous Pan-African granitic bodies that have been attributed to post-collisional rift-related *** present study is concerned with the first appraisal of intermediate magmatism(diorite,monzonite,and monzodiorite)found in the Borjuri Pluton of Mikir Massif,which is the eastern extension of *** diorites are strongly metaluminous and exhibit enriched LREE([La/Yb]N=1.63–7.37)with respect to HREE([Gd/Yb]N=1.95–2.27).The studied rocks do not show any mineralogical or textural indication of *** discrimination diagrams indicate that these rocks originated in a within-plate tectonic *** lower Mg#(33.49–38.69),low Cr(below detection limit),and Ni(27–41 ppm)contents along with elemental ratios such as Rb/Sr(0.32–0.95),La/Nb(0.49–4.21),and Nb/Ce(0.11–0.64)suggest a crustal source for the *** diagrams coupled with elemental ratios suggest that these rocks originated due to partial melting of mafic components in the crust with possible contribution from mantle *** P–T conditions of diorite emplacement(7.4 kbar,688℃)were calculated using the amphibole-plagioclase *** and geochronological data of the Pan-African felsic plutons reported from the AMGC indicate that these rocks were emplaced in a post-collisional extensional *** Borjuri Pluton is in close proximity with the Kathalguri Pluton,which has been reported as a product of PanAfrican *** view of the numerous extensional Pan-African felsic magmatism reported from the AMGC and based on the close vicinity of the Borjuri diorites with the Kathalguri granites,we speculate that the Borjuri diorites are products of the Pan-African post-collisional magmatism.

关键词： Granites Rift-related magmatism Intermediate magmatism Within-plate tectonic setting Kathalguri Pluton Assam-Meghalaya Gneissic Complex

Trace elemental signatures and mineral chemistry of clays associated with the alteration halos of the Paleoproterozoic U mineralization in Bijawars of the Sonrai Basin,Central India

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Acta Geochimica 2020年第3期39卷 365-386页

作者： Surendra Kumar Jha Rashmi Sharma Jaya prakash Shrivastava University of Delhi DelhiIndia Department of Cement Technology A.K.S.UniversitySatnaMPIndia

Paleoproterozoic Bijawars of the Sonrai basin consists of(a) Sonrai(mostly carbonate carbonaceous shale and phosphatic breccia) and(b) Solda Formations(commonly chloritic and ferruginous shale) with well-developed clay-organo-rich facies,often marked with hydrothermal *** studies revealed abundance order of kaolinite> chlorite> illite> smectite;and kaolinite> illite> chlorite in clay(0.2-2.0 μm) fractions separated from the Sonrai and Solda Formations,*** understand atomic substitutions and trace elemental concentrations,clay minerals were analyzed by fusion ICPMS and *** normalized data plots show U,Th,Rb,Ba,Pb Sr,and large-ion lithophiles enrichment,whereas,Bandai sandstone and Rohini carbonate clays show HREE enrichment with asymmetrical patterns,similar to those reported from the well-established McArthur River,Cigar Lake,and Sue UTUD of *** Rohni carbonate,chondrite-normalized REE data plots revealed M shape REE patterns,ascribed to Gd-Tb-Dy-Ho tetrad effect and anomalous Y,Zr,and Hf *** to HREE incorporation in the clay inter-layers,linear and flattened REE trends were *** REE patterns associated with the highly altered chlorite and illite represent negative Eu anomaly related to the dilational nature of the uraninite structure and is suggestive of anoxic conditions.

关键词： Bijawars Sonrai basin Clays REE patterns Uranium mineralization

Kinetics of solid-state reduction of chromite overburden

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International Journal of Minerals,Metallurgy and Materials 2023年第12期30卷 2347-2355页

作者： Saida Shaik Zhiyuan Chen Preeti prakash Sahoo Chenna Rao Borra Metallurgical and Materials Engineering Department Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India VITO-Flemish Institute for Technological Research Boeretang 200B-2400 MolBelgium Research and Development Division Tata Steel Ltd.Jamshedpur 831001India

The demand for alternative low-grade iron ores is on the rise due to the rapid depletion of high-grade natural iron ore resources and the increased need for steel usage in daily ***,the use of low-grade iron ores is a constant clinical task for industry *** smelting of low-grade ores consumes a substantial amount of energy due to the large volume of slag *** condition can be avoided by direct reduction followed by magnetic separation(to separate the high amount of gangue or refractory and metal parts)and *** overburden(COB)is a mine waste generated in chromite ore processing,and it mainly consists of iron,chromium,and nickel(<1wt%).In the present work,the isothermal and non-isothermal kinetics of the solid-state reduction of self-reduced pellets prepared using low-grade iron ore(COB)were thoroughly investigated via thermal *** results showed that the reduction of pellets followed a firstorder autocatalytic reaction control mechanism in the temperature range of 900-1100℃.The autocatalytic nature of the reduction reaction was due to the presence of nickel in the *** apparent activation energy obtained from the kinetics results showed that the solid-state reactions between COB and carbon were the rate-determining step in iron oxide reduction.

关键词： chromite overburden solid-state reduction kinetics autocatalytic reaction

Antidiabetic,hypolipidemic and histopathological analysis of Dillenia indica (L.) leaves extract on alloxan induced diabetic rats

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Asian Pacific Journal of Tropical Medicine 2011年第5期4卷 347-352页

作者： Sunil Kumar Vipin Kumar Om prakash Institute of Pharmaceutical Sciences Kurukshetra UniversityHaryanaIndia

Objective:To investigate antidiabetic,hypolipidemic histopathological analysis of Dillenia indica(***) methanolic leaves(DIME) extract in alloxan induced diabetic rat by administering oral doses(250 and 500 mg/kg body weight).Methods:Blood glucose levels were measured using blood glucose test strips with elegance glucometer on weekly intervals till the end of study(i.e.3 weeks).Other parameters *** profile,renal profile and total lipid levels were determined in normal and alloxan induced diabetic rats after oral administration of the extract for 21 *** changes in diabetic rat organs(pancreas,liver and kidney) were also observed after extract treatment Results:Daily oral administration DIME(250 and 500 mg/kg body weight) and glibenclamide(10 mg/kg) showed beneficial effects on blood glucose level (P<0.001) as well as improving kidney,liver functions and hyperlipidaemia due to diabetes. The extract treatment also showed to enhanced serum insulin level and body weight of diabetic rats as compared to diabetic control ***,the extract has a favorable effect on the histopathological changes of the pancreas,liver and kidney in alloxan induced diabetes. Conclusions:*** possess antidiabetic property as well improve body weight,liver profile, renal profile and total lipid *** has also favorable effect to inhibit the histopathological changes of the pancreas and kidney in alloxan induced diabetes.

关键词： Antidiabetic Dillenia indica Hypolipidemic Rat Serum cholesterol

A review of recent advances in tribology

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Friction 2020年第2期8卷 221-300页

作者： Yonggang MENG Jun XU Zhongmin JIN Braham prakash Yuanzhong HU State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China School of Mechanical Engineering University of LeedsLeeds LS29JTUK

The reach of tribology has expanded in diverse fields and tribology related research activities have seen immense growth during the last *** review takes stock of the recent advances in research pertaining to different aspects of tribology within the last 2 to 3 *** aspects of tribology that have been reviewed including lubrication,wear and surface engineering,biotribology,high tem perature tribology,and computational *** review attempts to highlight recent research and also presents future outlook pertaining to these *** may however be noted that there are limitations of this *** of the most important of these is that tribology being a highly multidisciplinary field,the research results are widely spread across various disciplines and there can be omissions because of ***,the topics dealt with in the field of tribology include only some of the salient topics(such as lubrication,wear,surface engineering,biotribology,high tem perature tribology,and computational tribology)but there are many more aspects of tribology that have not been covered in this *** these limitations it is hoped that such a review will bring the most recent salient research in focus and will be beneficial for the growing community of tribology researchers.

关键词： tribology biotribology lubrication superlubricity friction wear,surface engineering

Spectrum handoff scheme with multiple attributes decision making for optimal network selection in cognitive radio networks

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Digital Communications and Networks 2017年第3期3卷 164-175页

作者： Krishan Kumar Arun prakash Rajeev Tripathi Department oJ:Electronics and Communication Engineering Motilal Nehru National Institute of Technology Allahabad 211004 India Electronics and Communication Engineering Department National Institute of Technology Hamirpur 177005 India Director Motilal Nehru National Institute of Technology Allahabad 211004 India

It is envisaged that in future Cognitive Radio （CR） networks deployment, multiple radio access networks may coexist. The networks may have different characteristics in terms of multiple attributes. CRs will have choices of selecting the optimal network out of the available networks. Optimal network selection is a challenging task that can be performed by spectrum handoff with Multiple Attribute Decision Making （MADM）. The spectrum handoff decision with MADM provides wider and optimal choice with quality of service. This motivates the development of a spectrum handoff scheme with MADM methods such as simple additive weighting, a technique for order preference by similarity to the ideal solution, a grey relational analysis and a cost function based method, which is the objective of this study. The CR preferences are based on voice, video and data services, called triple play services. The numerical results show that all MADM methods are effective for selecting the optimal network for spectrum handoff with a reduced complexity for the spectrum handoff decision. The paper shows that the proposed spectrum handoff scheme can be effectively implemented to select the optimal network according to triple play services in CR networks.

关键词： Spectrum handoff Cognitive radio SAW TOPSIS GRA Cost function

Revisiting the role of mesenchymal stem cells in tuberculosis and other infectious diseases

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Cellular & Molecular Immunology 2023年第6期20卷 600-612页

作者： Annu Devi Isha Pahuja Shashi prakash Singh Akanksha Verma Debapriya Bhattacharya Ashima Bhaskar Ved prakash Dwivedi Gobardhan Das Special Centre for Molecular Medicine Jawaharlal Nehru UniversityNew DelhiIndia Immunobiology Group International Centre for Genetic Engineering and Biotechnology New DelhiIndia Department of Molecular Medicine Jamia Hamdard UniversityNew DelhiIndia Centre for Biotechnology Siksha O Anusandhan UniversityBhubneshwarOdishaIndia

Mesenchymal stem cells(MsCs)play diverse roles ranging from regeneration and wound healing to immune *** investigations have indicated the crucial role of these multipotent stem cells in regulating various aspects of the immune *** express unique signaling molecules and secrete various soluble factors that play critical roles in modulating and shaping immune responses,and in some other cases,MSCs can also exert direct antimicrobial effects,thereby helping with the eradication of invading ***,it has been demonstrated that MSCs are recruited at the periphery of the granuloma containing Mycobacterium tuberculosis and exert"Janus"-like functions by harboring pathogens and mediating host protective immune *** leads to the establishment of a dynamic balance between the host and the *** function through various immunomodulatory factors such as nitric oxide(NO),IDO,and immunosuppressive ***,our group has shown that *** uses MSCs as a niche to evade host protective immune surveillance mechanisms and establish *** also express a large number of ABC efflux pumps;therefore,dormant *** residing in MSCs are exposed to a suboptimal dose of ***,it is highly likely that drug resistance is coupled with dormancy and originates within *** this review,we discussed various immunomodulatory properties of MsCs,their interactions with important immune cells,and soluble *** also discussed the possible roles of MsCs in the outcome of multiple infections and in shaping the immune system,which may provide insight into therapeutic approaches using these cells in different infection models.

关键词： Mesenchymal Stem Cells(MsCs) Macrophages Tuberculosis Infectious Diseases T cells Immunomodulation Immunotherapy.