http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오늘 본 자료
Rajkumar,Fakrudin Bashasab,Mahaling S Kuruvinashetti 한국식물병리학회 2007 Plant Pathology Journal Vol.23 No.2
Genetic diversity among selected isolates of Macrophomina phaseolina, a causal agent of charcoal rot (stalk rot) disease in sorghum was studied using PCRRAPD markers. A set of ten isolates, from ten different rabi sorghum genotypes representing two traditional sorghum growing situations viz., Dharwad- a transitional high rainfall region and Bijapur- a semi-arid low rainfall region in South India. From a set of 40 random primers tested, amplicon profiles of 15 were reproducible. A total of 149 amplicon levels, with an average of 9.9 bands per primer, were available for analysis, of which 148 were polymorphic (99.3%). It was possible to discriminate all the isolates with any of the 15 primers employed. UPGMA clustering of data indicated that the isolates shared varied levels of genetic similarity within a range of 0.14 to 0.72 similarity coefficient index and it was suggestive that grouping of isolates was not related to sampling location in anyway. A high level of genetic heterogeneity of 0.28 was recorded among the isolates.
Raj Kumar,Sonal Gupta,Sourabh Wajhal,S.K. Satpati,M.L. Sahu 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.5
Liquid fueled molten salt reactors (MSRs) have seen renewed interest because of their inherent safetyfeatures, higher thermal efficiency and potential for efficient thorium utilisation for power generation. Thorium fluoride is one of the salts used in liquid fueled MSRs employing TheU cycle. In the presentstudy, ThF4 was prepared by hydro-fluorination of ThO2 using anhydrous HF gas. Process parameters viz. bed depth, hydrofluorination time and hydrofluorination temperature, were optimized for the preparation of ThF4 in a static bed reactor setup. The products were characterized with X-Ray diffraction andexperimental conditions for complete conversion to ThF4 were established which also corroborated withthe yield values. Hydrofluorination of ThO2 at 450 C for half an hour at a bed depth of 6 mm gave thebest result, with a yield of about 99.36% ThF4. No unconverted oxide or any other impurity was observed. Rietveld refinement was performed on the XRD data of this ThF4, and Chi2 value of 3.54 indicated goodagreement between observed and calculated profiles.
Analytical Modelling and Simulation Analysis of Junctionless Nanotube (JL NT) MOSFET
Raj Kumar,Raj Kumar,Arvind Kumar 한국전기전자재료학회 2022 Transactions on Electrical and Electronic Material Vol.23 No.4
In this paper, an analytical model for junctionless nanotube (JLNT) MOSFET has been developed. The analytical model for minimum central potential, threshold voltage and drain current has been developed by using variable separation method. These model expressions are further applied to analyse the Short Channel Effects (SCEs) of JL NT MOSFET. The electrical performance of proposed device has been investigated by varying different process parameters such as silicon nanotube thickness, gate oxide thickness, and gate length. All the results of developed models have been validated by comparing with so obtained simulated results from genius 3D device simulator of VisualTCAD for different device parameters. JLNT MOSFET with appropriate design parameters can be further explored for circuit applications.
RAJ KUMAR,ANIL KUMAR 대한설비공학회 2013 International Journal Of Air-Conditioning and Refr Vol.21 No.4
An NH3–H2O ejector-absorption refrigeration cycle, and an R-152a ejector refrigeration cycle are employed with a renewable energy power generator to make a proposed compact power generation and triple effect ejector-absorption refrigeration cycle. The exergy analysis of the cycle leads to a possible performance improvement. Approximately 71.69% of the input exergy is destructed due to irreversibilities in different components. Around 7.976% is available as the useful exergy output. The exhaust exergy lost to the environment is 20.33%, which is lower than the exhaust energy loss of 47.95%, while the useful energy output is 27.88%. The refrigerants used are of zero ODP and negligible GWP, and the CO2 emission of the exhaust gases is very small as compared to that of the fossil fuel run engine, hence, this cycle is favorable to the global environment. The results also show that the proposed cycle has signi¯cant higher energy and exergy effciency than the earlier investigated `triple effect refrigeration cycle' and `the combined power and ejectorrefrigeration cycle'.
On harmonic convolutions involving a vertical strip mapping
Raj Kumar,Sushma Gupta,Sukhjit Singh,Michael Dorff 대한수학회 2015 대한수학회보 Vol.52 No.1
Let $ f_\beta=h_\beta+\overline{g}{_\beta}$ and $F_a=H_a+\overline{G}_a$ be harmonic mappings obtained by shearing of analytic mappings $$h_\beta+g_\beta={1}/{(2i{\sin}\beta)}\log\left({(1+ze^{i\beta})}/{(1+ze^{-i\beta})}\right),~0<\beta<\pi$$ and $H_a+G_a={z}/{(1-z)}$, respectively. Kumar \emph{et al.} \cite{ku and gu} conjectured that if $\omega(z)=e^{i\theta}z^n (\theta\in\mathbb{R},\,\, n\in \mathbb{N})$ and $ \omega_a(z)={(a-z)}/{(1-az)},\,a\in(-1,1)$ are dilatations of $f_\beta$ and $F_a$, respectively, then $F_a\widetilde\ast f_\beta \, \in S_H^0$ and is convex in the direction of the real axis, provided $a\in \left[{(n-2)}/{(n+2)},1\right)$. They claimed to have verified the result for $n=1,2,3$ and $4$ only. In the present paper, we settle the above conjecture, in the affirmative, for $\beta=\pi/2$ and for all $n\in \mathbb{N}$.
One-Pot Synthesis of Ag Nanoparticles/Carbon Dots/Holocellulose Nanofibrils Ternary Nanocomposite
( Rajkumar Bandi ),( Chan-woo Park ),( Song-yi Han ),( Azelia Wulan Cindradewi ),( Eun-ah Lee ),( Jeong-ki Kim ),( Gu-joong Kwon ),( Seung-hwan Lee ) 한국목재공학회 2021 한국목재공학회 학술발표논문집 Vol.2021 No.1
Research on development of sustainable and environmentally friendly nanocomposites is a fast growing field due to their potential applications from the combination of unique chemical, optical and mechanical characteristics. Nanocellulose has a great potential to act as a sustainable support material for the formation of various nanocomposites. In this work, a novel ternary composite consisting of Ag nanoparticles, carbon dots and holocellulose nanofibrils (AgNPs/CDs/HCNF) is prepared by a one-pot hydrothermal treatment. During the reaction, AgNPs and CDs were grown in-situ on HCNF. Hemicellulose is crucial for the formation of CDs and AgNPs which was evident from control experiments using pure cellulose nanofibrils. Synthesis conditions were optimized, optical and physicochemical properties of the composite were studied in detail.
Radioiodination strategies for carborane compounds
Rajkumar Subramani,Abhinav Bhise,유정수 대한방사성의약품학회 2022 Journal of radiopharmaceuticals and molecular prob Vol.8 No.1
The development of methods for the inert and stable radiohalogenation of targeted radiopharmaceuticals is a prerequisite for real-time diagnosis and therapy using radiohalogenated radiopharmaceuticals. Radiohalogenated carboranes demonstrate superior stability in vivo and versatile applications compared with directly labeled tyrosine analogues or synthetically modified organic compounds. Herein, we focus on the most common approaches for the radioiodination (123I, 124I, 125I, and 131I) of carborane derivatives.
FIXED DIVISOR OF A MULTIVARIATE POLYNOMIAL AND GENERALIZED FACTORIALS IN SEVERAL VARIABLES
Rajkumar, Krishnan,Reddy, Arikatla Satyanarayana,Semwal, Devendra Prasad Korean Mathematical Society 2018 대한수학회지 Vol.55 No.6
We define new generalized factorials in several variables over an arbitrary subset ${\underline{S}}{\subseteq}R^n$, where R is a Dedekind domain and n is a positive integer. We then study the properties of the fixed divisor $d(\underline{S},f)$ of a multivariate polynomial $f{\in}R[x_1,x_2,{\ldots},x_n]$. We generalize the results of Polya, Bhargava, Gunji & McQuillan and strengthen that of Evrard, all of which relate the fixed divisor to generalized factorials of ${\underline{S}}$. We also express $d(\underline{S},f)$ in terms of the images $f({\underline{a}})$ of finitely many elements ${\underline{a}}{\in}R^n$, generalizing a result of Hensel, and in terms of the coefficients of f under explicit bases.
Rajkumar Divya Sangeetha,Mariswamy Annapoorna Ballagere 대한치과보존학회 2021 Restorative Dentistry & Endodontics Vol.46 No.3
Objectives: This study aimed to evaluate Emblica officinalis (Indian gooseberry or amla) as an acid etchant and matrix metalloproteinase (MMP) inhibitor, and to compare its effect on the microshear bond strength of composite resin with orthophosphoric acid (OPA) and 2% chlorhexidine (CHX) as an acid etchant and MMP inhibitor, respectively. Materials and Methods: The etching effect and MMP-inhibiting action of amla on dentin samples were confirmed by scanning electron microscopy (SEM) and gelatin zymography, respectively. Dentinal slabs (3 mm thick) from 80 extracted human molars were divided into 10 and 20 samples to form 2 control groups and 3 experimental groups. Groups 1, 2, and 4 were etched with OPA and groups 3 and 5 with amla juice. An MMP inhibitor was then applied: CHX for group 2 and amla extract for groups 4 and 5. Groups 1 and 3 received no MMP inhibitor. All specimens received a standardized bonding protocol and composite resin build-up, and were subjected to microshear bond strength testing. The force at which the fracture occurred was recorded and statistically analyzed. Results: Amla juice had a similar etching effect as a self-etch adhesive in SEM and 100% amla extract was found to inhibit MMP-9 by gelatin zymography. The microshear bond strength values of amla were lower than those obtained for OPA and CHX, but the difference was not statistically significant. Conclusions: Amla has a promising role as an acid etchant and MMP inhibitor, but further studies are necessary to substantiate its efficacy
( Rajkumar Bandi ),( Chan-woo Park ),( Song-yi Han ),( Azelia Wulan Cindradewi ),( Eun-ah Lee ),( Jeong-ki Kim ),( Gu-joong Kwon ),( Seung-hwan Lee ) 한국목재공학회 2021 한국목재공학회 학술발표논문집 Vol.2021 No.1
Preparation of nanocellulose-based hydrogels that can be used in the field of biomedicine, have gained tremendous attention. Carbon dots are the latest addition to the carbon nanomaterials family and are well known for their stable fluorescence and high biocompatibility. Hence the incorporation of carbon dots into the nanocellulose-based hydrogels can broaden their applicability. In this work, a facile one-pot hydrothermal method is demonstrated to prepare N-doped carbon dots/holocellulose nanofibrils composite (NCDs/HCNF) hydrogel. During the hydrothermal treatment, the NCDs grow in-situ on HCNF surface and serve as cross-linkers to produce hydrogel. Hemicellulose portion of HCNF act as carbon source and ethylenediamine will serve as N dopant. Synthesis conditions were optimized, optical and physicochemical properties were studied in detail.