http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
개별검색 DB통합검색이 안되는 DB는 DB아이콘을 클릭하여 이용하실 수 있습니다.
통계정보 및 조사
예술 / 패션
<해외전자자료 이용권한 안내>
- 이용 대상 : RISS의 모든 해외전자자료는 교수, 강사, 대학(원)생, 연구원, 대학직원에 한하여(로그인 필수) 이용 가능
- 구독대학 소속 이용자: RISS 해외전자자료 통합검색 및 등록된 대학IP 대역 내에서 24시간 무료 이용
- 미구독대학 소속 이용자: RISS 해외전자자료 통합검색을 통한 오후 4시~익일 오전 9시 무료 이용
※ 단, EBSCO ASC/BSC(오후 5시~익일 오전 9시 무료 이용)
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.
<P>Two strains, designated Sac-22<SUP>T</SUP> and Sac-41<SUP>T</SUP>, were isolated from rhizosphere soil and rhizoplane of field-grown sugar cane clone Co86032. Comparative 16S rRNA gene sequence analysis showed a clear affiliation of these two bacteria with the class <I>Betaproteobacteria</I>, their closest relatives being <I>Pseudoduganella violaceinigra</I> and <I>Duganella zoogloeoides</I> with 16S rRNA gene sequence pairwise similarities of 96.4–97.2 % to the two novel strains. Strains Sac-22<SUP>T</SUP> and Sac-41<SUP>T</SUP> shared a 16S rRNA gene sequence similarity value of 97.6 %. Cells of the two strains were Gram-reaction-negative, aerobic, motile and rod-shaped. Ubiquinone (Q-8) was the respiratory quinone and the predominant polar lipids consisted of phosphatidylglycerol and phosphatidylethanolamine. The main cellular fatty acids were C<SUB>16 : 0</SUB>, C<SUB>16 : 1</SUB>ω7<I>c</I>/iso-C<SUB>15 : 0</SUB> 2-OH, C<SUB>17 : 0</SUB> cyclo, C<SUB>10 : 0</SUB> 3-OH and C<SUB>12 : 0</SUB>. The DNA G<I>+</I>C content of the genomic DNA was 56.4 mol% for strain Sac-22<SUP>T</SUP> and 54.9 mol% for strain Sac-41<SUP>T</SUP>. Based on the results of 16S rRNA gene sequence analysis and physiological and biochemical characterization, that differentiated strains Sac-22<SUP>T</SUP> and Sac-41<SUP>T</SUP> from all recognized species of the genus <I>Duganella</I>, it was concluded that strains represent two novel species in the genus <I>Duganella</I> for which the names <I>Duganella</I> <I>sacchari</I> sp. nov. (type strain Sac-22<SUP>T</SUP> = KCTC 22381<SUP>T</SUP> = NCIMB 14475<SUP>T</SUP>) and <I>Duganella</I> <I>radicis</I> sp. nov. (type strain Sac-41<SUP>T</SUP> = KCTC 22382<SUP>T</SUP> = NCIMB 14476<SUP>T</SUP>) are proposed.</P>