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- 저자 : Poonguzhali, Selvaraj (검색결과 67 건)
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Pachai Poonguzhali(Pachai Poonguzhali ),Ashish Chauhan(Ashish Chauhan ),Abinash Kar(Abinash Kar ),Shivaji Lavale(Shivaji Lavale ),Spurthi N. Nayak(Spurthi N. Nayak ),S. K. Prashanthi(S. K. Prashanthi 한국식물병리학회 2022 Plant Pathology Journal Vol.38 No.6
Sheath blight disease caused by the necrotrophic, soilborne pathogen Rhizoctonia solani Kuhn, is the global threat to rice production. Lack of reliable stable resistance sources in rice germplasm pool for sheath blight has made resistance breeding a very difficult task. In the current study, 101 rice landraces were screened against R. solani under artificial epiphytotics and identified six moderately resistant landraces, Jigguvaratiga, Honasu, Jeer Sali, Jeeraga-2, BiliKagga, and Medini Sannabatta with relative lesion height (RLH) range of 21-30%. Landrace Jigguvaratiga with consistent and better level of resistance (21% RLH) than resistant check Tetep (RLH 28%) was used to develop mapping population. DNA markers associated with ShB resistance were identified in F2 mapping population developed from Jigguvaratiga × BPT5204 (susceptible variety) using bulk segregant analysis. Among 56 parental polymorphic markers, RM5556, RM6208, and RM7 were polymorphic between the bulks. Single marker analysis indicated the significant association of ShB with RM5556 and RM6208 with phenotypic variance (R2) of 28.29 and 20.06%, respectively. Co-segregation analysis confirmed the strong association of RM5556 and RM6208 located on chromosome 8 for ShB trait. This is the first report on association of RM6208 marker for ShB resistance. In silico analysis revealed that RM6208 loci resides the stearoyl ACP desaturases protein, which is involved in defense mechanism against plant pathogens. RM5556 loci resides a protein, with unknown function. The putative candidate genes or quantitative trait locus harbouring at the marker interval of RM5556 and RM6208 can be further used to develop ShB resistant varieties using molecular breeding approaches.
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Design and performance analysis of smart photonic sensors for industrial applications
S Poonguzhali,Sivasangari A.,Ajitha P.,Lalithakumari S.,Sridevi A.,Danasegaran Sathish Kumar 한국물리학회 2022 Current Applied Physics Vol.39 No.-
Toxic gas has a median fatal concentration in the oxygen of much more than 200 parts per million (ppm) but far less than 2000 ppm by volume of gas. Many industries, mines and thermal plants emit perilous gases that are more harmful to our human life. The Proposed nanosensor senses the various perilous gases and averts many accidents. In this paper, a two-dimensional Photonic Crystal (2D-PhC) resonator and PhC-based poisonous gas sensor based on the hexagonal and square crystal lattice are built-in smart way. The PhCs are artificial constructs of any material with an occasional enunciation of refractive index (RI). It has effective light manipulation and it would be helpful to obtain light migration in the handling of sensing applications. The TE/TM wave transmission can shift as per the RI value of different gases in the PhCs. The wavelength variations obtained agree well with the Finite Difference Time Domain (FDTD) study, and the simulation is performed by the tool RSoft. The spectral variables such as quality factor (QF), sensitivity (Se), transmitted output power and detection limit (DL) are evaluated using the RI value over the spectrum of different toxic gases. The proposed square crystal structure have acquired a QF range of 500.6, high efficiency of 99%, and a better Se of 716.6 nm/RIU at 1502 nm. The designed hexagonal crystal structure have acquired a QF range of 165.8, high efficiency of 99%, and a better Se of 798.24 nm/RIU at 1630 nm respectively. The DL for both the proposed sensors is very low. So, the designed smart sensor helps promptly recognize the contaminated gases in several places. The proposed nanosensor is helpful in industrial safety, health care applications, aerospace, agricultural, transportation, environmental monitoring, thermal plants and mines.
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V. Poonguzhali,M. Umar,P. Sathiya 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.1
In this work, the corrosion and creep properties of weld beads produced on AA5083-H111 alloy using SpinArc gas metalarc welding process were analyzed. For that, bead on plate welding was carried out considering welding current, filler spindiameter and filler rotation speed as input parameters. It is evident from the microstructures that change in filler spin diameterand filler rotation speed altered the shape of weld bead irrespective of welding current. Also, porosities were formed atboth side walls where the columnar dendrites grow upward while the equiaxed dendrites zone contains comparatively fewerporosities. On comparing the left and a right side wall, a higher density of porosities are observed at the right side wall andthe direction of rotation was expected to be responsible for this occurrence. The pitting morphology of both side walls wasnot similar due to the variance in concentration of Mg and a higher amount of Mg exists on the right side wall led to theprecipitation of Mg-rich rich particles result in severe corrosion. A welding current of 130 Amps, the filler rotation speed of1050 rpm and filler spin diameter of 2 mm produced a high density of dislocations and a higher number of Fe and Mn-richintermetallics at grain interiors as well as grain boundaries, thereby, results in improved corrosion and creep properties ofweld. The weld contains larger porosities results in poor corrosion and creep properties.
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