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Hybrid silver nanoparticles:Modes of synthesis and various biomedical applications

Electron 2024年第2期2卷 196-218页

作者： Priyanka singh shivang singh Balaji Maddiboyina SaiKrishna Kandalam Tomasz Walski Raghvendra A.Bohara Centre for Interdisciplinary Research D.Y.Patil Educational SocietyKolhapurIndia Department of Internal Medicine Rauta Hospital Pvt.LtdGaighatUdayapurNepal Department of Medical and Scientific Communications Scientific Writing ServicesFreyr Global Regulatory Solutions&ServicesHyderabadTelanganaIndia INSERM U 1066 ‘Micro et Nanomédecines Biomimétiques-MINT’AngersFrance UniversitéAngers UMR-S1066AngersFrance Department of Biomedical Engineering Wroclaw University of Science and TechnologyWroclawPoland University of Galway

In the present day,there is a growing trend of employing new strategies to synthesize hybrid nanoparticles,which involve combining various functionalities into a single nanocomposite *** modern methods differ significantly from the traditional classical approaches and have emerged at the forefront of materials *** fabrication of hybrid nanomaterials presents an unparalleled opportunity for applica-tions in a wide range of areas,including therapy to *** focus of this review article is to shed light on the different modalities of hybrid nanoparticles,providing a concise description of hybrid silver nano-particles,exploring various modes of synthesis and classification of hybrid silver nanoparticles,and highlighting their ***-tionally,we discussed core-shell silver nanoparticles and various types of core and shell combinations based on the material category,such as dielectric,metal,or *** two primary classes of hybrid silver nanoparticles were also ***,various hybrid nanoparticles and their methods of synthesis were discussed but we emphasize silica as a suitable candidate for hybridization alongside metal *** choice is due to its hydrophilic surface qualities and high surface charge,which provide the desired repulsive forces to minimize aggregation between the metal nanoparticles in the liquid *** shell encapsulation also provides chemical inertness,robustness and the adaptability to the desired hybrid ***,among all the materials used to coat metal nanoparticles;silica is highly approved.

关键词： biomedical applications hybrid silver nanoparticles polyvinylpyrrolidone silica shell surface enhanced Raman spectroscopy

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Performance assessment of Alccofine with silica fume,fly ash and slag for development of high strength mortar

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Frontiers of Structural and Civil Engineering 2022年第5期16卷 576-588页

作者： shivang D.JAYSWAL Mahesh MUNGULE Civil Engineering Department Institute of InfrastructureTechnologyResearch and Management(IITRAM)Ahmedabad 380026India

Previous studies on concrete have identified silica fume(SF)as the most effective supplementary material,whereas fly ash(FA)and slag have been identified as economical materials with long term strength *** of blended cement mortar referred to as blended mortar(BM)requires similar *** present study explores the application of Alccofine(AL)as supplementary material and compares its performance with conventional materials namely SF,FA and ground granulated blast furnace slag(GGBS).The mortar specimens with binder to fine-aggregates(b/f)ratio of 1:2 are prepared at water to binder(w/b)ratios of 0.4 and *** strength values and stress-strain curve for control and BM specimens are obtained at 7,28,56,and 90 d curing *** assessment based on strength activity index,k-value method and strength estimation model confirms that AL,despite lower pozzolanic activity,contributes to strength gain,due to reduced dilution *** of stress-strain curves suggests that the effect of w/b ratio is more dominant on the elastic modulus of BM specimens than on control *** observations from the study identify enhanced strength gain,improved elastic modulus and higher energy absorption as key contributions of AL making it a potential supplementary material.

关键词： Alccofine high strength mortar efficiency factor dilution effect

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Investigation of enhancement in planar fast neutron detector efficiency with stacked structure using Geant4

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Nuclear Science and Techniques 2017年第11期28卷 154-163页

作者： shivang Tripathi Chandrakant Upadhyay C. P. Nagaraj K. Devan A. Venkatesan K. Madhusoodanan Homi Bhabha National Institute AnushaktinagarMumbai 400094 India Indira Gandhi Centre for Atomic Research Kalpakkam 603102 India

Geant4 based Monte Carlo study has been carried out to assess the improvement in efficiency of the planar structure of Silicon Carbide(SiC)-based semiconductor fast neutron detector with the stacked structure. A proton recoil detector was simulated, which consists of hydrogenous converter, i.e., high-density polyethylene(HDPE) for generating recoil protons by means of neutron elastic scattering(n, p) reaction and semiconductor material SiC, for generating a detectable electrical signal upon transport of recoil protons through it. SiC is considered in order to overcome the various factors associated with conventional Si-based devices such as operability in a harsh radiation environment, as often encountered in nuclear facilities. Converter layer thickness is optimized by considering 10~9 neutron events of different monoenergetic neutron sources as well as ^(241)Am-Be neutron spectrum. It is found that the optimized thickness for neutron energy range of 1–10 MeV is ~400 μm. However, the efficiency of fast neutron detection is estimated to be only 0.112%,which is considered very low for meaningful and reliable detection of neutrons. To overcome this problem, a stacked juxtaposition of converter layer between SiC layers has been analyzed in order to achieve high efficiency. It is noted that a tenfold efficiency improvement has been obtained—1.04% for 10 layers stacked configuration vis-à-vis 0.112% of single converter layer detector. Further simulation of the stacked detector with respect to variable converter thickness has been performed to achieve the efficiency as high as ~3.85% with up to 50 stacks.

关键词： Geant4 Fast neutron detector Silicon carbide Recoil proton Stacked detector

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Telemonitoring in heart failure patients:Systematic review and metaanalysis of randomized controlled trials

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World Journal of Cardiology 2022年第12期14卷 640-656页

作者： Chukwuemeka Anthony Umeh Adrian Torbela Shipra Saigal Harpreet Kaur Shadi Kazourra Rahul Gupta shivang Shah Internal Medicine Hemet Global Medical CenterHemetCA 92543United States Department of Cardiology Loma Linda University School of MedicineLoma LindaCA 92350United States Department of Cardiology University of California Riverside School of MedicineRiversideCA 92507United States

BACKGROUND Home telemonitoring has been used as a modality to prevent readmission and improve outcomes for patients with heart ***,studies have produced conflicting outcomes over the *** To determine the aggregate effect of telemonitoring on all-cause mortality,heart failure-related mortality,all-cause hospitalization,and heart failure-related hospitalization in heart failure *** We conducted a systematic review and meta-analysis of 38 home telemonitoring randomized controlled trials involving 14993 *** also conducted a sensitivity analysis to examine the effect of telemonitoring duration,recent heart failure hospitalization,and age on telemonitoring *** Our study demonstrated that home telemonitoring in heart failure patients was associated with reduced all-cause[relative risk(RR)=0.83,95% confidence interval(CI):0.75-0.92,P=0.001]and cardiovascular mortality(RR=0.66,95%CI:0.54-0.81,P<0.001).Additionally,telemonitoring decreased the all-cause hospitalization(RR=0.87,95%CI:0.80-0.94,P=0.002)but did not decrease heart failurerelated hospitalization(RR=0.88,95%CI:0.77-1.01,P=0.066).However,prolonged home telemonitoring(12 mo or more)was associated with both decreased all-cause and heart failure hospitalization,unlike shorter duration(6 mo or less)*** Home telemonitoring using digital/broadband/satellite/wireless or blue-tooth transmission of physiological data reduces all-cause and cardiovascular mortality in heart failure *** addition,prolonged telemonitoring(≥12 mo)reduces all-cause and heart failure-related *** implication for practice is that hospitals considering telemonitoring to reduce heart failure readmission rates may need to plan for prolonged telemonitoring to see the effect they are looking for.

关键词： Telemonitoring Heart failure Telehealth Home monitoring Remote monitoring

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