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Chinese Physics B 2020年第10期29卷 566-572页

作者： Deepika raju kumar Ritesh kumar Kamdeo Prasad Yadav Pratyush Vaibhav Seema Sharma Rakesh kumar Singh Santosh kumar College o f Commerce Arts and SciencePatna.BiharIndia Jaypee University o f Engineering and Technology GunaMadhya PradeshIndia Anugrah Narayan College PatnaBiharIndia Aryabhatta Knowledge University PatnaBiharIndia

Zn0.90Ni0.10O nanoparticles have been synthesized by single-bath two-electrode electrodeposition at constant voltage. X-ray diffraction, UV vis and photoluminescence studies reveal that a single-phase polycrystalline hcp wurtzite crystal structure of ZnO is evolved. The material consists of a large number of defects such as oxygen vacancy (Ov) and zinc interstitial (Zi). The magnetization study reveals that the sample exhibits room-temperature global ferromagnetism and the ferromagnetic ordering seems to be defect induced via bound magnetic polaron mechanism, and double exchange is also expected to have played role. Interesting optoelectronic properties have been found in the synthesized sample and the material seems to be a potential candidate to be used as a UV sensor. Such a transition metal doped ZnO based dilute magnetic semiconducting system exhibiting room-temperature ferromagnetism is likely to be first of its kind in the sense that such materials have not yet been reported to be synthesized by the simple method of electrodeposition to the best of our knowledge on the basis of ample literature review.

关键词： dilute magnetic semiconductors(DMS) bound magnetic polaron photoluminescence ferromagnetism

In vitro and in vivo anticancer activity of Indigofera cassioides ***. DC.

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Asian Pacific Journal of Tropical Medicine 2011年第5期4卷 379-385页

作者： raju Senthil kumar Balasubramanian Rajkapoor Perumal Perumal Natural Products Laboratory Swamy Vivekanandha College of PharmacyTiruchengoduTamilnaduIndia Department of Pharmacology Dayanandha Sagar College of PharmacyBangaloreIndia Department of Pharmaceutical Chemistry JKK Nataraja College of PharmacyKomarapalayamTamilnaduIndia

Objective:To evaluate the antitumor,cytotoxic and antioxidant activities of methanolic leaf extract of Indigofera cassioides(MEIC) against transplantable tumors and human cancer cell ***:MEIC was investigated for its short term cytotoxicity on EAC and DLA cells by trypan blue dye exclusion method and in vitro cytotoxicity on HeLa,HEp-2,HEpG-2,MCF-7, HT-29,Vero and NIH 3T3 cells by MTT *** vivo antitumor activity was studied on EAC and DLA tumor bearing *** was assessed by monitoring the mean survival time,effect on hematological parameters,antioxidant enzyme levels and solid tumor ***:MEIC exhibit potent in vitro cytotoxicity against all the tested cancer cell lines,but it was found to be safe on normal *** extract significantly(P<0.001) increase the mean survival time and also have a protective effect on the hemopoietic system at the tested dose levels(200 and 400 mg/kg). The extract prevented lipid peroxidation and restored the antioxidant enzymes catalase, superoxide dismutase,glutathione peroxidase and glutathione-s-transferase in the liver of tumor control *** also significandy(P<0.01) reduce the solid tumor ***:The results strongly support that MEIC shows potent antitumor and cytotoxic effects against EAC,DLA and human cancer cell *** extract prevents lipid peroxidation and promotes the enzymatic antioxidant defense system in tumor bearing animals which might be due to activities like scavenging of free radicals by the phytochemicals in MEIC.

关键词： Indigofera cassioides Cytotoxicity Antitumor Antioxidant Mean survival time Hematological parameters Solid tumor volume

Semiconductor based photocatalysts for detoxification of emerging pharmaceutical pollutants from aquatic systems: A critical review

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Nano Materials Science 2021年第1期3卷 25-46页

作者： Prasenjit Kar Komal Shukla Pratyush Jain Govindasamy Sathiyan raju kumar Gupta Department of Chemical Engineering Indian Institute of Technology KanpurKanpur208016Uttar PradeshIndia Center for Environmental Science and Engineering Indian Institute of Technology KanpurKanpur208016Uttar PradeshIndia

The presence of emerging pharmaceutical pollutants at low concentration levels in the surface and ground water has caused a potential threat to the marine and human *** emerging pharmaceutical pollutants generally include analgesics and anti-inflammatories,lipid-lowering drugs,antiepileptics,antibiotics,and β-blockers *** recent years,various processes have been developed and advanced oxidation process is the most effective for decontamination of emerging pharmaceutical pollutants till *** based photocatalysis technology has recently received a great interest for the removal of new emerging pharmaceutical *** review article highlights the removal of emerging pharmaceutical pollutants especially through photocatalysis as well as recent progress using different *** focus has been given over fundamental key dynamics processes of nanomaterials and degradation pathways of emerging pharmaceutical ***,this review concludes with the perspectives and outlook over future developments in photocatalysis technology for the degradation of emerging pharmaceutical pollutants leading to a solution for realworld in near future.

关键词： Emerging pharmaceutical pollutants Photocatalysis Nanomaterials Degradation mechanism

Structural,morphological,optical and antibacterial performances of rare earth(Sm)-doped ZnO nanorods

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Journal of Rare Earths 2024年第11期42卷 2119-2127,I0005页

作者： A.Ravi J.Samuel S.Sahaya Jude Dhas S.Usharani Turibius Simon D.Senthil kumar S.K.Jasmin Vijitha A.Sivakumar raju Suresh kumar C.S.Biju Department of Physics University College of EngineeringKancheepuram631552TamilnaduIndia Department of Physics and Research Centre Malankara Catholic CollegeMariagiri629153TamilnaduIndia Manonmaniam Sundaranar University Abishekapatti627012TirunelveliTamilnaduIndia Saveetha School of Engineering Saveetha Institute of Medical and Technical SciencesSaveetha UniversityChennaiTamil Nadu602105India Department of Chemistry S.I.V.E.T CollegeGowrivakkamChennai600073TamilnaduIndia Department of Biotechnology Vivekanandha College of Arts and Science for Woman(Autonomous)Elayampalam637205TiruchengodeNamakkalTamilnaduIndia Department of Physics Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyAvadiChennai600062India Department of Physics&Research Centre Muslim Arts CollegeThiruvithancode629174TamilnaduIndia Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior Institute of GeochemistryChinese Academy of SciencesGuiyang550081China Department of Chemistry College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia Department of Physics St.Alphonsa College of Arts and ScienceSoosaipuramKarinkal629157Tamil NaduIndia

The significant rise of ultra-violet(UV) radiation and pathogenic infectious bacteria poses a serious threat to global *** researchers' interests are attracted by novel materials with strong UVblocking ability,antibacterial activity and low toxicity to other *** this case,a simple wet chemical method with different annealing temperatures(400,500,and 600℃) was employed to create highly effective rare earth(Sm)-doped ZnO ***(101) plane of wurtzite ZnO shifts towards a lower angle with increasing annealing temperature,according to the X-ray diffraction(XRD) study findings,which additionally establishes the consequence of lattice *** of doublet peaks of Sm 3d(Sm 3d_(5/2) and Sm 3d_(3/2)) in the X-ray photoelectron spectroscopy(XPS) spectrum clearly validates the substitution of Sm^(3+) ions in the 500℃-annealed *** 500℃-annealed nanorods exhibit combined performances of the wide band gap,improved UV absorbance,and vivid green luminescent emission(563 nm).Additio nally,the nanorods have favorable UV-blocking execution of 96% for UVA at 360 nm,92% for UVB at 320 nm,and 57% for UVC at 225 nm,which is greater than the majority of ZnO-related materials that have been reported up to this *** doping is also appropriate for improving bacterial inhibition against the two studied strains(Escherichia coli and Staphylococcus aureus),in addition to the intriguing features discussed ***,with maximum inhibition zone diameters of 20±0.72 and 18±0.57 mm,respectively,these nanorods exhibit high inhibitory action against *** and *** bacterial *** rare earth-doped material developed during the current experiment,which was annealed at 500℃,could potentially serve as an effective replacement for UV-blocking and antibacterial material,especially for biomedical applications.

关键词： Wet chemical method Rare earth doping Metal oxide UV-Shielding Bacterial inhibition

Extraction of a novel tanning agent from indigenous plant bark and its application in leather processing

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Journal of Leather Science and Engineering 2022年第1期4卷 253-267页

作者： raju kumar Das Al Mizan Fatema Tuj Zohra Sobur Ahmed Khondoker Shahin Ahmed Hemayet Hossain Institute of Leather Engineering and Technology(ILET) University of Dhaka44-50HazaribaghDhaka 1209Bangladesh Department of Leather Engineering Khulna University of Engineering&Technology(KUET)Khulna 9203Bangladesh Department of Leather Engineering Faculty of EngineeringEge University35100 BornovaIzmirTurkey BCSIR Laboratories Chemical Research DivisionBangladesh Council of Scientific and Industrial Research(BCSIR)DhanmondiDhaka 1205Bangladesh

The use of vegetable tanning materials in leather processing has drawn attention as an alternative to basic chromium sulphate for its natural abundance and environmental aspects. In this work, an attempt has been made to extract veg-etable tannins from Xylocarpus granatum bark using different solvents (e.g., water, methanol, ethanol, and chloroform) and compare with conventional vegetable tanning agents such as mimosa and quebracho. The highest extraction efficiency was observed 31.22% by methanol. The presence of tannin content and polyphenolic compounds, e.g. (-)epicatechin (503 mg/100 g dry extract), catechin hydrate (218 mg/100 g dry extract), catechol (29 mg/100 g dry extract) were ensured by UV-Vis, FT-IR spectroscopy and HPLC. Again, condensed tannins, moisture content, and pH of the methanol extracted tannin were found 47.80%, 5.82%, and 3.97 respectively. The leather tanned by Xylocar-pus granatum tannin showed a shrinkage temperature of 86.34 ± 1.52 °C. Other properties such as tensile strength, tear strength, grain cracking load, and distention at grain cracking were comparable to conventional vegetable- tanned leather. The cross-sectional morphology of the tanned leathers was also characterized by scanning electron microscopy (SEM) which revealed a compact structure of the leather fibers. In light of the findings from the study, X. granatum bark tannin could be a well alternative to chromium and a new source of vegetable tannin for the leather industry.

关键词： Vegetable tanning agent Strength properties Shrinkage temperature Chrome-free leather Alternative tannin Xylocarpus granatum

Unsupported nanoporous palladium‐catalyzed chemoselective hydrogenation of quinolines:Heterolytic cleavage of H_2 molecule

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Chinese Journal of Catalysis 2018年第11期39卷 1746-1752页

作者： Ye Lu Yoshinori Yamamoto Abdulrahman I.Almansour Natarajan Arumugam raju Suresh kumar Ming Bao State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116023LiaoningChina Department of Chemistry Graduate School of ScienceTohoku UniversitySendai 980‐8578Japan Research Organization of Science and Technology Ritsumeikan UniversityKusatsuShiga 525‐8577Japan Department of Chemistry College of SciencesKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

An efficient and highly chemoselective heterogeneous catalyst system for quinoline hydrogenation was developed using unsupported nanoporous palladium(PdNPore).The PdNPore‐catalyzed chemoselective hydrogenation of quinoline proceeded smoothly under mild reaction conditions(low H2 pressure and temperature)to yield 1,2,3,4‐tetrahydroquinolines(py‐THQs)in satisfactory to excellent *** synthetically useful functional groups,such as halogen,hydroxyl,formyl,ethoxycarbonyl,and aminocarbonyl groups,remained intact during the quinoline *** palladium was leached from PdNPore during the hydrogenation ***,the catalyst was easily recovered and reused without any loss of catalytic *** results of kinetic,deuterium‐hydrogen exchange,and deuterium‐labeling experiments indicated that the present hydrogenation involves heterolytic H2 splitting on the surface of the catalyst.

关键词： Nanoporous materials Palladium Quinoline Chemoselective hydrogenation Heterogeneous catalyst

Role of PET-CT (Positron Emission Tomography-Computed Tomography) in Cancer Evaluation and Treatment

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World Journal of Nuclear Science and Technology 2022年第1期12卷 11-20页

作者： Balireddy Vasundhara Pottumuthu Hemalatha Pakalapati Satya Sarath kumar raju Department of Physics GITAM Institute of Science GITAM University Visakhapatnam India Department of Nuclear Medicine & PETCT Omega Hospitals Hyderabad India

Context: Positron emission tomography is a nuclear medicine imaging that deals with physiological function using radioisotopes. With the most PET (Positron Emission Tomography) scanners in integration with the CT scanners of late, this technology has registered phenomenal growth. The small amount of radioactive material is called Radiotracers. Objective: Like 18F- Fluro-deoxy-2-glucose has widely used. In this article, the author introduced clinical applications of PET out of 25 patients who studied hypermetabolic lesions in lymph nodes. Methods: PET imaging is coincidence imaging which is different from the other imaging technique PET image formed from multiple rings of detector crystals. Each decay positron travel in tissue annihilation reaction is going on. FDG is the most commonly used radiotracer to detect and stage various types of malignancies. Result: The field of PET/CT imaging cares for many oncology patients. PET improved localization of malignant lesions. It improved staging biopsy and therapy. Conclusion: Finally, studies to data showed 4% to 10% improvement in the overall accuracy of staging/restaging in lesions. If we use Monte Carlo simulation, OLINDA/EXM software may improve further with widely used.

关键词： Positron Emission Tomography Radio Isotopes Lymphoma Neo-Plasmas

Carboxylative Suzuki coupling reactions of benzyl chlorides with allyl pinacolborate catalyzed by palladium nanoparticles

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Chinese Journal of Catalysis 2018年第7期39卷 1258-1262页

作者： Jian Sun Jiasheng Wang Xiujuan Feng Yoshinori Yamamoto Abdulrahman I.Almansour Natarajan Arumugam raju Suresh kumar Ming Bao State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116023LiaoningChina School of Petroleum and Chemical Engineering Dalian University of TechnologyPanjin 124221Liaoning China Department of Chemistry Graduate School of Science Tohoku UniversitySendai 980-8578Japan Research Organization of Science and Technology Ritsumeikan UniversityKusatsuShiga 525-8577Japan Department of Chemistry College of Sciences King Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arobia

Palladium-catalyzed carboxylative Suzuki coupling reactions of benzyl chlorides with allyl pinacol-borate were successfully conducted in the absence of any extra ligand to produce β,γ-unsaturated esters in satisfactory to good yields. The carboxylative Suzuki coupling reaction proceeded smooth-ly under mild conditions in the presence of palladium nanoparticles generated in situ through the formation of a π-benzylpalladium chloride intermediate.

关键词： Palladium nanoparticles Carboxylative Suzuki coupling Carbon dioxide Benzyl chlorides Allyl pinacolborate

Spectral Analysis and Crystal Structure of Spiro[2.2”] Acenaphthene-1”-One-Spiro[3.3’]-5’-(2,3-Dichlorophenyl Methylidene)-1’-Methylpiperidin-4’-One-4- (2,3-Dichlorophenyl) Octahydroindolizine

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Crystal Structure Theory and Applications 2012年第3期1卷 74-78页

作者： Rakkappan Vishnu Priya Janakiraman Suresh Sathiyamoorthi Sivakumar raju Ranjith kumar Department of Organic Chemistry School of Chemistry Madurai Kamaraj University Madurai India Department of Physics The Madura College (Autonomous) Madurai India

The crystal structure of spiro[2.2”]acenaphthene-1”-onespiro[3.3’]-5’-(2,3-dichlorophenylmethylidene)-1’-methylpipe-ridin-4’-one-4-(2,3-dichorophenyl) octahydroindolizine was elucidated by single crystal X ray diffraction. The title compound C37H30Cl4N2O2, crystallizes in the orthorhombic system, space group P212121 with a = 8.4610(4) , b = 16.0926(6) , c= 23.8997(11) and Z = 4. The central piperidine ring adopts twisted conformation, the piperidine of octahydroindolizine ring is in chair conformation and the pyrrole ring is in slightly twisted envelope conformation. Details of the synthesis, NMR, crystal structure determination and intra- and inter- molecular interactions of the compound are given.

关键词： Single Crystal Structure Conformation Hydrogen Bond NMR Spectra

IMPEDANCE AND MODULUS SPECTROSCOPY CHARACTERIZATION OF SODIUM-BISMUTH TITANATE-BASED LEAD-FREE FERROELECTRIC MATERIALS

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Journal of Advanced Dielectrics 2012年第1期2卷 48-58页

作者： DHANANJAY K.SHARMA raju kumar RADHESHYAM RAI SEEMA SHARMA ANDREI L.KHOLKIN Ferroelectric Research Laboratory Department of Physics A N CollegePatna 800013India Department of Ceramics and Glass Engineering and CICECO University of Aveiro 3810-193AveiroPortugal

In this paper,we present impedance spectroscopy of Sodium Bismuth Titanate-based materials belonging to(1-x)TNa_(1/2)Bi_(1/2)TiO_(3)-xBaTiO_(3)(x=0.04)(NBT-BT)***-BT ceramics are prepared by high temperature solid-state reaction method.X-ray diffraction technique showed single-phase polycrystalline sample with an ABO3 perovskite *** behavior and the impedance relaxation were investigated in a wide range of temperature(room temperature(RT)-500℃)and frequency(1 kHz-1 MHz).A broad dielectric constant peak was observed over a wide temperature range around the phase transition *** complex impedance plot exhibited one impedance semicircle identified over the frequency range of 1 kHz-1MHz,which is explained by the grain effect of the *** centers of the impedance semicircles lie below the real axis,which indicates that the impedance response is a Cole-Cole type relaxation.

关键词： Ceramics X-ray diffraction piezoelectricity perovskite dielectric properties