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RISS 인기검색어
- 검색키워드
- 저자 : Narayanarao, Narasimha Murthy Heddale (검색결과 3 건)
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Comparative study of Metallic and Polymer Composite Shells for Underwater Vessels Using FEA
Govindaraj, Moorthy,Narayanarao, Narasimha Murthy Heddale,Munishaiah, Krishna,Nagappa, Raghavendra Korean Society of Ocean Engineers 2013 International journal of ocean system engineering Vol.3 No.3
The present research was aimed at comparing performance of metallic and polymer composite shells of a typical underwater vessel of length and inner diameter of 1650 mm and 350 mm respectively, based on the critical buckling pressure for operating depth of 1000 m using ANSYS. High strength steel, aluminium alloy, titanium alloy, glass / epoxy and carbon / epoxy materials were examined. The results indicated weight savings of 46 % in carbon/epoxy and 31 % in glass / epoxy when compared with high strength steel, based on the thickness of the shell for sustaining 10 MPa buckling pressure.
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Effect of Plant Population Densities on the Severity of Late Leaf Spot and Rust of Groundnut
S.Pande,J.NarayanaRao 한국식물병리학회 2002 Plant Pathology Journal Vol.18 No.5
The effect of five plant population densities [5 (D1), 10 (D2), 20 (D3), 30 (D4), and 40 (D5) plants/m2] of four groundnut cultivars [ICGV 86699, ICG (FDRS) 10, ICGS 11 and TMV 2] and fungicide application (Kavach, chlorothalonil) to manage late leaf spot (LLS) and rust were studied in a field experiment during the 1995 and 1996 rainy seasons. LLS and rust severities were low in fungicide sprayed plots in all the cultivars irrespective of plant densities. Severities of LLS and rust, and percentage defoliation caused by LLS were significantly more in higher plant densities (D4, D5) than in lower plant densities (D1, D2, D3) in fungicide sprayed and unsprayed plots in all the cultivars. All the cultivars gave significantly higher haulm and pod yields in fungicide sprayed plots than in unsprayed plots. Haulm and pod yields were significantly higher in higher plant densities than in lower plant densities. A combination of higher plant densities (D4, D5) and fungicide protection against LLS and rust gave maximum yield.
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G.KrishnaKishore,S.Pande,K.Manjula,J.NarayanaRao,D.Thomas 한국식물병리학회 2002 Plant Pathology Journal Vol.18 No.4
states in India. A total of 182 groundnut samples collected at harvesting from farmers fields in five districts, namely; Anantapur, Chittoor, Cuddapah, Kurnool, and Mahaboobnagar, during 1999 and 2000 rainy seasons were evaluated for the presence of mycotoxins (both aflatoxins and zearalenone) and toxigenic fungi. In samples collected from each district, average seed infection by Aspergillus flavus and Fusarium spp. was 11.9-18.3% and 5.6-12.8% in 1999, and 9.5-14.1% and 9.4-11.9% in 2000, respectively. Among the samples collected, 20.3% and 16.5% were contaminated with aflatoxin in 1999 and 2000, respectively, and in 11.4% and 8.7% of the seed samples collected in two seasons, the aflatoxin content was >30 mg/kg. An alarming aflatoxin content of 851.9 mg/kg was found in samples collected from Anantapur district during the rainy season in 1999. Zearalenone was not detected in any of the samples collected in 1999, while 2 out of 103 samples collected in 2000 were contaminated with 35.1 and 129.4 mg/kg. Under in vitro cultural conditions, 35.8% of the 173 A. flavus isolates collected from the groundnut samples produced aflatoxins at concentrations of 94.3- 1598.6 ng/ml and 3% of the 266 Fusarium spp. isolates produced 98.1-847.3 mg/g of zearalenone. The results emphasize the need for a more systematic and regular monitoring of pre-harvest aflatoxin contamination.
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