Genetic Variability of Sorghum Charcoal Rot Pathogen (Macrophomina phaseolina) Assessed by Random DNA Markers

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.

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.

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 $n\in \mathbb{N}$.

ENERGY AND EXERGY ANALYSIS OF COMPACT POWER GENERATION AND HYBRID SOLAR ENERGY-WASTE HEAT-BASED TRIPLE EFFECT EJECTOR-VAPOR ABSORPTION REFRIGERATION CYCLE

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'.

Effect of process parameters on the recovery of thorium tetrafl uoride prepared by hydrofl uorination of thorium oxide, and their optimization

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.

Carbon dots attached nanocellulose as a recyclable nanozyme for colorimetric biosensing

Rajkumar Bandi,Ramakrishna Dadigala,Song-Yi Han,Jeong-ki Kim,Gu-Joong Kwon,Seung-Hwan Lee 강원대학교 산림과학연구소 2022 강원대학교 산림과학연구소 학술대회 Vol.2022 No.10

Carbon dots (CDs) are widely employed as peroxidase mimics in biosensing. However, as colloidal nanozymes, CDs suffer from the drawbacks of substrate induced aggregation and difficulties in recovery and reuse. Nanocellulose is proposed as a support material to overcome these drawbacks and two immobilization strategies were explored here. In first strategy, peroxidase mimicking Fe-doped CDs (FeCDs) were immobilized on TEMPO-oxidized cellulose nanofibrils (TOCNF) via physical entrapment involving hydrogen bonding interactions. Peroxidase activity of the composite nanopaper was evaluated using TMB as chromogenic substrate and applied to the colorimetric detection of H2O2 and glucose. Under optimal conditions, this method afforded linear ranges of 6– 42 μM and 10–70 μM and detection limits of 0.93 and 1.73 μM for the H2O2 and glucose, respectively. In another strategy, amine functionalized, Fe, N-doped CDs (FeNCDs) were immobilized on dialdehyde cellulose nanofibrils (DACNF) via Schiff base reaction and reductive amination. DACNF served as an excellent matrix for FeNCDs to retain the fluorescence and peroxidase activities. Colorimetric assays based on ABTS oxidation offered linear ranges of 10–80 μM and 50–400 μM and detection limits of 0.70 and 3.72 μM for H2O2 and cholesterol respectively. Further the nanocomposite presented a long shelf life and excellent reusability for 10 cycles. Overall, nanocellulose acted as a great support material for the colloidal nanozyme that prevented them from aggregation and made them easy to recycle and reuse.

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.

Ag nanoparticles deposited dicarboxylate nanocellulose aerogels as efficient and recyclable catalyst for dye pollutants reduction

( Rajkumar Bandi ),( Ramakrishna Dadigala ),( Song-yi Han ),( Le Van Hai ),( Seung-woo Cho ),( Seo-young Ma ),( Da-young Lee ),( Gu-joong Kwon ),( Ju-won Jin ),( Hae-chan Moon ),( Go-un Yang ),이승환 한국공업화학회 2024 한국공업화학회 연구논문 초록집 Vol.2024 No.0

Quad Code Sequence Generation Using Cyclic Redundancy Technique to Enhance Target Detection in Doppler Rader

Rajkumar D. Bhure,K. Manjunathachari 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.6

Today’s world is contemplating to set the new developments in radar to face the security challenges in defense. In the scope of radar signal processing, technical expertise in the signal processing, coding theory and techniques brought a lot of exposers to improve the detection probability in terms of range and position. The present art of work focusing on the detection of multiple moving targets using Doppler radar. Though the existing approaches try to increase the Merit Factor and range resolution of the acquired Signal, As such methods fail to fi nd out the target when they are in multiple and moving, due to which the amplitude of the side spikes (Noise) is much more with respect to the highest detectable limit. Those side spikes dominate the probability of detection of a target because the weak echoes from the small targets may be masked by these side spikes of huge moving targets. This recommended approach provides clear information about the targets with respect to Doppler by creating multiple clear windows at various Doppler’s with respect to the range. The amplitude of all windows is below 85–90 dB down, so all moving targets can be easily detected. This approach is validating by the use of Mat lab.

One-Pot Synthesis of Fluorescent Hydrogels by the In-Situ Growth of Carbon Dots on Holocellulose Nanofibrils

( 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.