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Movable Au Microplates as Fluorescence Enhancing Substrates for Live Cells

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Nano Research 2010年第10期3卷 738-747页

作者： boya radha Mohammed Arif Ranjan Datta Tapas K.Kundu Giridhar U.Kulkarni Chemistry and Physics of Materials Unit and DST Unit on Nanoscience Jawaharlal Nehru Centre for Advanced Scientific ResearchJakkur P.O.Bangalore 560064India Molecular Biology and Genetics Unit Jawaharlal Nehru Centre for Advanced Scientific ResearchJakkur P.O.Bangalore 560064India International Centre for Materials Science Jawaharlal Nehru Centre for Advanced Scientific ResearchJakkur P.O.Bangalore 560064India

Hexagonal and triangular Au microplates extending over an area of~12,000μm^(2) with thickness in the range 30-1000 nm have been synthesized using a single step thermolysis of(AuCl_(4))^(-)-tetraoctylammonium bromide complex in *** microplates are self-supporting and can be easily manipulated using a sharp pin,a property which enables them to serve as substrates for living *** microplate surface is non-toxic to living cells and can enhance the fluorescence signal from fluorophores residing within the cell by an order of *** addition,the microplates are smooth and single-crystalline,and ideal as microscopy substrates and molecular *** growth of the microplates in the initial stages is interesting in that they seem to grow perpendicular to the substrate,as evidenced by in situ microscopy.

关键词： Au microplates synthesis cell substrate metal enhanced fluorescence manipulation

Present status and future directions:Apexification

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World Journal of Methodology 2025年第1期15卷 26-32页

作者： Sachin Chauhan radha Chauhan Prashant Bhasin Bhavna G Sharaf Department of Conservative Dentistry and Endodontics Sudha Rustagi College of Dental Sciences and ResearchFaridabad 121002HaryanaIndia Department of Prosthodontics and Crown and Bridge and Oral Implantology Mahatma Gandhi Dental College&HospitalJaipur 302022RajasthanIndia Department of Pedodontics and Preventive Dentistry Sudha Rustagi College of Dental Sciences and ResearchFaridabad 121002HaryanaIndia

The success rate of apexification is primarily determined by multiple factors,including the material used,the size of the open apex compared to the length of the root,and the technique used in each *** main objective of this review was to provide an update on the present management of open apex to identify factors and circumstances that may influence the success of apexification using different materials and *** research on apexification should focus on how to treat open apices with wide periapical lesions without ***,the predictability of these parameters with non-surgical procedures was uncertain,but now,with the use of a dental operating microscope,it has become more *** reason could be that extra visits are no longer required due to major advances in the armamentarium and materials used for apexification.

关键词： Bioceramics Magnification Biodentine Mineral trioxide aggregate Apexification Open apex

Inhomogeneous cosmological models in the presence of massless scalar fields

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Research in Astronomy and Astrophysics 2010年第7期10卷 663-671页

作者： radha Charan Sahu Department of Mathematics K. S. U. B. College Bhanjanagar 761 126 Orissa India

Non-static inhomogeneous cosmological models are obtained in general relativity for the case of a plane symmetric massless scalar field with cosmological constant A, when the source of the gravitational field is a vis... 详细信息

关键词： cosmology cosmological parameters

Single Fully Differential Second Generation Current Conveyor Based Four-Quadrant Analog Multiplier Design and Its Applications

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Chinese Journal of Electronics 2020年第5期29卷 959-965页

作者： ROY Suvajit PAL radha-Raman Department of Physics and Technophysics Vidyasagar University

This manuscript presents a new fourquadrant analog multiplier using a recently reported current mode active building block, namely the Fully differential second generation current conveyor(FDCCⅡ).The proposed circuit employs single FDCCⅡ and two NMOSFETs only, thus has simple architecture. It is fully-integrable as no other external passive component has been used. Non-ideal behaviour of the reported configuration has been analysed considering current and voltage tracking errors of the FDCCⅡ. Workability of the derived multiplier is verified with PSPICE(Cadence16.6) simulations using model parameter of TSMC 0.35μm CMOS process and found to be in close agreement with theoretical anticipations. The static power consumption of the circuit is 0.107 mW. The circuit works well with good linearity(nonlinearity error ≤ 0.96%) for the input voltage range of ±0.5 V for a supply voltage of ±1 V and the output is insensitive to temperature variation. Simulation results show that the –3 dB bandwidth of the proposed multiplier is 20.67 MHz and the output referred noise√is less than 9 nV/Hz at 1 kΩ load condition. MonteCarlo analysis has also been performed for the proposed configuration. The applicability of the reported multiplier as amplitude modulator, squarer, and frequency doubler are also demonstrated.

关键词： Four-quadrant analog multiplier Fully differential second generation current conveyor (FDCCII) Amplitude modulator Squarer Frequency doubler

One step synthesis and characterization of copper doped sulfated titania and its enhanced photocatalytic activity in visible light by degradation of methyl orange

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Chinese Journal of Chemical Engineering 2016年第4期24卷 475-483页

作者： radha Devi Chekuri Siva Rao Tirukkovalluri Department of Inorganic and Analytical Chemistry School of Chemistry Andhra University Visakhapatnam India

This paper reports on the synthesis of copper doped sulfated titania nano-crystalline powders with varying （2.0%-10.0%, by mass） by single step sol gel method. The synthesized photo catalyst has been characterized by employing various techniques like X-ray Diffraction （XRD）, Ultraviolet-Visible Diffuse Reflection Spectroscopy （UV-Vis DRS）, X-ray Photoelectron Spectroscopy （XPS）, Scanning Electron Microscopy （SEM）, Energy Dispersive Spectrometry （EDS）, Fourier Transform Infrared Spectroscopic Studies （FT-IR）, and Transmission Electron Microscopy （TEM）. From the XRD and TEM results, all the samples were reported in anatase phase with reduction in particle size in the range of 7 to 12 nm. SEM indicated the change in morphology of the particles. The presence of copper in titania lattice was evidenced by XPS. From UV-Vis DRS and FT-IR studies indicated that prominent absorption shift is observed towards visible region （red shift）, the entry ofCu2 ＋ into Ti02 lattice as a substitution- al dopant and S042- ions were covalently bonded with Ti4＋ on the surface of the copper doped titania respectively. The photocatalytic activity studies were investigated by considering methyl orange （MO） as dye pollutant in the presence of the visible light. The effect of various parameters like effect of dosage of the catalyst, dopant concentration, pH of the solution, and concentration of the dye was studied in detail.

关键词： Copper doped sulfated TiO2 Sol-gel methodPhotocatalysisMethyl orange

Mechanical and corrosion behaviour of hydroxyapatite reinforced Mg-Sn alloy composite by squeeze casting for biomedical applications

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Journal of Magnesium and Alloys 2020年第2期8卷 452-460页

作者： R radha D.Sreekanth School of Mechanical and Building Sciences Vellore Institute of TechnologyChennai 600127India

Magnesium alloys have gained increasing attention for biomedical applications due to their biocompatibility and the ***(HA)is known to be a highly bioactive because of its similar chemical and crystallographic structures to ***,HA is believed to be a potential ceramic material for the fabrication of Mg based composites,to combine the advantages of both Mg and ***,in general,the composites known to be more susceptible to corrosion attack than the matrix ***,in the present work,Sn is used as an alloying element to evaluate its effect on mechanical as well as corrosion properties of Mg/HA *** with 5 wt%HA and Mg-1 wt%Sn-5 wt%HA composites were prepared separately by stir assisted squeeze casting *** phase analysis and microstructure were characterized by X-ray diffraction(XRD)and scanning electron microscope(SEM)coupled with energy dispersive spectroscopy(EDS)*** properties were evaluated by conducting the compression and micro hardness *** properties of as-cast composites were studied by linear polarization,Tafel and electrochemical impedance spectroscopy(EIS)*** results of both XRD and SEM-EDS revealed that the main constitutional phases of as-cast Mg/HA composites were a-Mg and HA whereas,in Mg-Sn/HA composites,the phase Mg^Sn was observed along with fine distribution of HA *** both the cases,no interfacial reactions *** yield strength,ultimate compression strength and hardness were found to be increased with the addition of Sn in Mg/HA ***,the addition of Sn also played an important role in increasing the corrosion resistance of the Mg/HA composites which was attributed the refinement of grain size and the formation of Mg2Sn phase along the grain ***,it was concluded that the addition of Sn improves both mechanical and corrosion properties of Mg/HA composites.

关键词： Magnesium Composite Biomedical Corrosion Squeeze casting

Insight of magnesium alloys and composites for orthopedic implant applications-a review

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Journal of Magnesium and Alloys 2017年第3期5卷 286-312页

作者： R radha D Sreekanth School of Mechanical and Building Sciences VIT UniversityChennaiIndia

Magnesium(Mg)and its alloys have been widely researched for orthopedic applications *** alloys have stupendous advantages over the commercially available stainless steel,Co-Cr-Ni alloy and titanium *** date,extensive mechanical,in-vitro and in-vivo studies have been done to improve the biomedical performance of Mg alloys through alloying,processing conditions,surface modification *** review comprehensively describes the strategies for improving the mechanical and degradation performance of Mg alloys through properly tailoring the composition of alloying elements,reinforcements and processing *** also highlights the status and progress of research in to(i)the selection of nutrient elements for alloying,reinforcement and its effects(ii)type of Mg alloy system(binary,ternary and quaternary)and composites(iii)grain refinement for strengthening through severe plastic deformation *** it also emphasizes on the importance of Mg composites with regard to hard tissue applications.

关键词： Orthopedic implants Magnesium Alloy system Composites Grain refinement Processing,degradation,strengthening

Prospecting microbial biofilms as climate smart strategies for improving plant and soil health: A review

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Pedosphere 2023年第1期33卷 129-152页

作者： Kulandaivelu VELMOUROUGANE Shobit THAPA radha PRASANNA Division of Crop Production Indian Council of Agricultural Research-Central Institute for Cotton Research(CICR)Nagpur 440010India Indian Council of Agricultural Research-National Bureau of Agriculturally Important Microorganisms KushmaurMau Nath Bhanjan 275103India Division of Microbiology Indian Council of Agricultural Research-Indian Agricultural Research InstituteNew Delhi 110012India

Microbes and their products play key roles in complementing chemical fertilizers and plant protection chemicals by eliciting defence mechanisms in crop plants,thereby providing immunity and resistance against diverse *** the different environmental technologies used to mitigate climate change,several microbiological interventions are promising,among which biofilms,both naturally-existing and laboratory-developed,and their application have gained momentum *** biofilms are aggregations of microbial cells in a self-generated polymeric matrix,which are produced by several genera of bacteria,yeasts,cyanobacteria,and fungi as a mode of reproductive fitness,thereby advantageous in successful proliferation,even in extreme *** propensity of microbial biofilms to grow in diverse niches and adapt to biotic and abiotic stresses illustrates their immense potential as biofertilizers and disease suppression options in various crops across diverse *** the inhospitable habitats of deserts and denudated land,biofilms play an important role in preventing soil erosion and sustaining vegetation,microflora,and *** represent a mode of growth for several microbes with plant growth-promoting and biocontrol potential,which are important in seed establishment and the facilitation of exchanging nutrients and metabolites from the *** this review,we discuss the prospects of microbial biofilms as a green option in agriculture in general and,more specifically,their potential in mitigating climate change.

关键词： biocontrol bioremediation climate change environmental stress nutrient sequestration plant growth promotion

Magnification:The game changer in dentistry

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World Journal of Methodology 2025年第2期15卷 74-82页

作者： Sachin Chauhan radha Chauhan Prashant Bhasin Meenu Bhasin Department of Conservative Dentistry and Endodontics Sudha Rustagi College of Dental Sciences and ResearchFaridabad 121002India Department of Prosthodontics and Crown and Bridge and Oral Implantology Mahatma Gandhi Dental College and HospitalJaipur 302022India Department of Periodontics Sudha Rustagi College of Dental Sciences and ResearchFaridabad 121002India

During dental examinations and treatments,many dentists are using magni-fication to improve their *** dental operating microscope serves as the most effective tool for this purpose,enhancing the quality,longevity,and outcome of clinical *** review will explore the latest research and data on the importance of magnification devices in dentistry,including diagnostic methods,treatment options and ergonomics in specialities such as restorative dentistry,endodontics,pedodontics,periodontics,and *** review aims to provide insights into the optimal magnification for different clinical situations,the specific benefits of dental operating microscopes for each dental branch,and their limitations.

关键词： Magnification Vision Endodontics Dentistry Dental operating microscope