http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Rafiqul Islam,Shamima Choudhury,S. N. Rahman,Mohammad Jellur Rahman 한양대학교 세라믹연구소 2012 Journal of Ceramic Processing Research Vol.13 No.3
The structural and electrical properties of pure and manganese doped barium titanate (BaTiO3) with a general formula BaMnxTi1-xO3 (where x=0.00, 0.01, 0.02, 0.03, and 0.04) were investigated. For the observation of the surface morphology and estimation of grain sizes scanning electron microscopy (SEM) was employed. The grain size of BaTiO3 increased with an increase of the Mn doping. The Curie temperature (Tc) which indicates the tetragonal-to-cubic transition, of each sample was found from the resistivity versus temperature curve, and Tc of BaTiO3 increased linearly with an increase of the Mn doping. The Tc of un-doped BaTiO3 was lower than that of the doped samples. The Tc value of pure BaTiO3 was found to be 120 oC. It was found that the dielectric constant versus temperature curve also shows a similar type of Tc. The dielectric constant of BaMnxTi1-xO3 was found to decrease with an increase of Mn doping and the Tc of BaTiO3 increases with the addition of Mn. The structural and electrical properties of pure and manganese doped barium titanate (BaTiO3) with a general formula BaMnxTi1-xO3 (where x=0.00, 0.01, 0.02, 0.03, and 0.04) were investigated. For the observation of the surface morphology and estimation of grain sizes scanning electron microscopy (SEM) was employed. The grain size of BaTiO3 increased with an increase of the Mn doping. The Curie temperature (Tc) which indicates the tetragonal-to-cubic transition, of each sample was found from the resistivity versus temperature curve, and Tc of BaTiO3 increased linearly with an increase of the Mn doping. The Tc of un-doped BaTiO3 was lower than that of the doped samples. The Tc value of pure BaTiO3 was found to be 120 oC. It was found that the dielectric constant versus temperature curve also shows a similar type of Tc. The dielectric constant of BaMnxTi1-xO3 was found to decrease with an increase of Mn doping and the Tc of BaTiO3 increases with the addition of Mn.
Md. Rafiqul Islam,Jeong-Eui Hong,Hoy-Taek Kim,Jong-In Park,Ill-Sup Nou 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
Acidovorax citrulli (A. citrulli) strain causes bacterial fruit blotch (BFB) in cucurbit crops and watermelon, is an economically devastating disease in watermelon. Molecular characterization of causal strains and identification of sources of resistance are essential to control this important disease. BFB were identified by partial sequencing and documented in GenBank. Recently, there was an outbreak of BFB strain NIHHS16-088 in watermelon fields (North Jeolla Province, South Korea) that severely hampered watermelon production in Korea. Therefore, we characterized NIHHS16-088 by partially sequencing the 16S rRNA gene using PCR-based markers. The partial sequence of the 16S rRNA gene of NIHHS16-088 was much more similar to A. citrulli strains allied with watermelon and melon hosts than other cucurbit hosts. A PCR-based assay identified the strain (NIHHS16-088) as belonging to A. citrulli group II, which mostly infects watermelon cucurbits (virulent to watermelon). Seventy watermelon accessions were screened against NIHHS16-088 in a detached-leaf inoculation assay. The lack of visible disease symptoms 12 days after inoculation in lines SNKW41 and SNKW85 indicated these to be highly resistant, whereas moderate resistance was observed in SNKW60, SNKW61, SNKW103 and SNKW104. The characterized A. citrulli strain NIHHS16-088 (group II) and identified resistant lines will assist as a precious resource for further genetic studies and development of BFB resistance in watermelon.
Md. Rafiqul Alam,Joong Ryong Ji,김민수,김남수 대한수의학회 2011 JOURNAL OF VETERINARY SCIENCE Vol.12 No.3
The levels of tartrate resistant acid phosphatase (TRAP), matrix metalloproteinase-2 (MMP-2), and tissue inhibitor of matrix metalloproteinase-2 (TIMP-2) in synovial fluid (SF) and serum in cases of canine osteoarthritis (OA) were measured. OA was induced by a surgically-created medial patellar luxation in the left stifle of 24 dogs. SF and blood samples were collected at 1.5- and 3-month intervals, respectively. Every 3 months, one dog was euthanatized to collect tissue samples from both stifles. TRAP levels in SF and serum were measured using a spectrophotometer, and TRAP-positive cells in joint tissues were identified by enzyme histochemistry. MMP-2 and TIMP-2 in SF and serum were detected by Western blotting and ELISA, respectively. TRAP in SF from the stifles and serum was significantly increased (p < 0.05) after 3 months. TIMP-2 in SF and serum was significantly decreased (p < 0.05), whereas MMP-2 in SF was significantly increased (p < 0.05) during the progression of OA. Histochemistry revealed an increased number of TRAP-positive cells in tissues from OA-affected joints. Assays measuring TRAP, MMP-2, and TIMP-2 in SF and serum, and methods that detect increased numbers of TRAP-positive cells in the joint tissues can play an important role in identifying the early phases of degenerative changes in canine joint components.