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Dextrin-Poly(acrylic acid) Copolymer as an Additive for Surface Sizing with Oxidized Starch
Chae Hoon Kim,Araz Rajabi Abhari,Young Bin Jeong,Hye Jung Youn,Young Seok Kim,Hak Lae Lee 한국펄프·종이공학회 2017 펄프.종이技術 Vol.49 No.2
Drying energy saving by reducing the steam consumption in the after-dryer section becomes more important for many grades of papers including linerboards because surface sizing gets more widely used for these grades. Drying energy demand in the after-dryer can be decreased by increasing the solids content of the sizing agent. This requires a new sizing agent or additive be developed that provide low in viscosity at higher solids content. A dextrin poly(acrylic acid) copolymer at a solids level of 52% was prepared and used as an additive for surface sizing with oxidized starch. The effect of the copolymer on viscosity, cooking property and retrogradation was examined using Brookfield viscometer and Brabender Viscograph. It was shown that use of the copolymer increased the solids content of sizing solutions and provided better cooking and storage properties. Starch graft copolymer could reduce the reassociation of starch molecules and hinder retrogradation after cooling and during the holding period.
채석래,차영주 중앙대학교 의과대학 의과학연구소 1998 中央醫大誌 Vol.23 No.3
1991년 3월부터 1998년 7월까지 중대 부속 용산병원 임상병리과에 의뢰된 혈액질환 환자 및 림프종의 골수 전이 여부를 알고자 했던 환자 218명의 골수 흡인 검체를 대상으로 고정도분염법에 의한 염색체 검사를 실시하여 다음과 같은 결과를 얻었다. 1. 급성골수성백혈병 40예 중 23예(58%)에서 염색체 이상소견을 보였으며, 중요한 염색체 이상으로는 8;21 전좌(4예), 15;17 전좌(3예), 11번 전좌(2예), 5번 결실(1예), 7번 결실(4예), 8번 획득(2예) 등이 있었으며, 3개 이상의 염색체 결함이 있는 경우가 3예 있었다. 2. 림프구성 백혈병 15예 중 7명(47%)에서 염색체 이상소견을 보였으며, 중요한 염색체 이상으로는 9;22 전좌(3예) 및 과배수성 염색체(1예)가 있었다. 3. 만성골수증식성질환 20명 중 만성골수성백혈병 7명 모두에서 9;22 전좌가 있었다. 4. 골수이형성증후군 16예 중 10예(63%)에서 염색체 이상소견을 보였으며, 특히 RA에서의 염색체 결함의 빈도가 대체로 높았다. International prognostic scoring system에 따른 염색체 예후양호군은 6예, intermediate group은 7예, 불량군은 3예이었으며, 주요 결함으로서 5번 결실(2예), 7번 결실(1예), 8번 획득(3예) 및 5;22 전좌 1예등이었다. 5. 다발성골수종, 림프종 및 기타 혈액질환 환자에서는 특이한 염색체 결함은 발견되지 않았다. 이상과 같은 결과로서 염색체 검사는 혈액질환의 진단 및 예후결정에 중요한 역할을 한다고 사료되지만 염색체 제작과정이 까다롭고 시간이 걸리며, 판독자의 실력에 따라 판독에 차이가 있을 수 있으므로 많은 경험을 쌓아야 하며, 분자생물학적 진단을 병행한다면 감도 및 특이도를 더 높일 수 있으리라 사료된다. Cytogenetic analyses of 218 patients with hematologic diseases and lymphoma were performed by MTx-treated high-resolution banding technique and the results were as follows. 1. Twenty three cases (58%) of 40 acute myelogenous leukemias revealed cytogenetic defects, and main defects were t(8;21), t(15;17), t(11q23;variable), -5, -7/del(7q), +8, and complex defects. 2. Seven cases (47%) of 15 lymphocytic leukemias revealed cytogenetic defects, and main defects were 5(9;22) and hyperdiploid chromosome. 3. In 20 cases of chronic myeloproliferative disorders, all of 7 chronic myelogenous leukemia had t(9;22). 4. Sixteen cases(63%) of 16 myelodysplastic syndromes revealed cytogenetic defects, and main defects were del(5q), -7, +8, and 5(5;12). The frequency of cytogenetic defects in the refractory anemia appeared high. According to the international prognostic scoring system(IPSS), 6 cases were classified as good, 7 cases as intermediate and 3 cases as poor karyotype group. 5. Other hematologic disease, lymphoma or multiple myeloma cases did not have disease-specific cytogenetic abnormalities. In conclusion, cytogenetic study plays an important role in the diagnosis and differential diagnosis of hematologic diseases as well as prediction of prognosis, and molecular study together with cytogenetic interpretation by skilled expert would raise sensitivity and specificity in the detection of genetic defects.
젊은 여성에 있어 과민성 장증후군과 배뇨 증상과의 관계: 인터넷 설문 조사
이석영 ( Seok Young Lee ),김병관 ( Byeong Gwan Kim ),김지원 ( Ji Won Kim ),정지봉 ( Ji Bong Jeong ),곽금연 ( Geum Yeon Kwak ),이국래 ( Kook Lae Lee ),손환철 ( Hwan Cheol Son ),정현채 ( Hyun Chae Jung ),송인성 ( In Sung Song ) 대한소화기기능성질환·운동학회 2005 Journal of Neurogastroenterology and Motility (JNM Vol.11 No.1
목적: 과민성 장증후군은 기능성 장 질환의 하나로 여성들의 유병율이 2배 이상 높고 또한, 여러 가지 다양한 장외 증상들을 보인다. 이번 연구에서는 우리나라 젊은 여성에서 과민성 장증후군과 배뇨 증상과의 관계를 알아보고자 하였다. 대상 및 방법: 2004년 7월 인터넷 전문 설문업체에 등록된 18-49세까지의 여성 50,000명에게 전자 우편을 보냈고 모든 설문에 답변한 대상자만 연구에 포함시켰으며 설문 답변 시간이 전체 대상자의 25% 미만인 경우는 Background/Aims: Patients suffering from irritable bowel syndrome (IBS) tend to have extraintestinal symptoms. The purpose of this study was to compare the nature and severity of the urinary symptoms in IBS patients in comparison to non-IBS patients. Meth
Dextrin-Poly(acrylic acid) Copolymer as an Additive for Surface Sizing with Oxidized Starch (Ⅱ)
Araz Rajabi,Chae Hoon Kim,Young Bin Jeong,Hye Jung Youn,Young Seok Kim,Hak Lae Lee 한국펄프·종이공학회 2017 펄프.종이技術 Vol.49 No.2
Drying energy demand in the after-dryer section for the surface sized paper is an important economic factor in papermaking. Using an efficient sizing solution with high solids content and decreasing the pickup weight can reduce the drying energy requirement in the after-dryer section. A dextrin-poly(acrylic acid) copolymer was used as an additive for surface sizing of linerboard, and its effect on the mechanical properties of linerboard, and drying energy consumption were investigated. Results showed that, addition of dextrin poly(acrylic acid) copolymer had beneficial effects on the holdout of surface sizing starch and provided higher compressive and bending strengths. It was possible to reduce pickup weight by 23% while keeping the compressive strength and bending resistance at a similar level. Consequently, the reduced pickup resulted in higher dryness after surface sizing. Even though, drying analysis of wet sized sheets at a laboratory gave a lower drying rate when the copolymer was used as an additive, the result from a mill trial revealed that steam usage decreased significantly when the copolymer was used as an additive for surface sizing, which was attributed to the reduction in the pickup weight and improvement in holdout of the surface sizing agents on linerboard surface that is more pronounced on a high speed paper machine.
백혈구 감별계산을 위한 자동혈구분석기 Sysmex SE-9000의 평가
남시현,채석래,차영주 중앙대학교 의과대학 의과학연구소 2000 中央醫大誌 Vol.25 No.1
Leukocyte differential counting and flags performed by hematoma autoanalyzer(Sysmex SE-9000) were evaluated in 726 specimens and compared with manual leukocyte differential counting. The results were as follows. 1. The correlation cofficient between the leukocyte proportion of automated and manual differential counting was 0.970,0.986,0.667,0.927 and 0.379 for neutrophil, lymphocyte, eosinophil, and basophil, respectively. In 100 healthy blood there were no significant differences between the results of automated and manual differential counting expect basophil. 2. One or more flags were pronted out in 480 specimens in which 217(45.2%) "Left shift", 142(29.6%) "Aty/Abn lympho", 138(28.8%) "Immature Gran", 109(22.7%) "Blasts" and 81(16.9%) "NRBC" could be observed. 3. Almost all of the false negative cases, for examples, 18 of 22 "Left shift", 10 of 11 "NRBC", and all 9 "Immature Gran" and 2 "Aty/Abn Lympho" have another kind of one or more flags instead, and were not regarded as false negative because they could be reviewed by another way. 4. False negative rate, false positive rate, negative predictive value, positive predicitive value, sensitivity, specificity and efficiency was 0.7%,22.4%,98.2%,64.4%,98.4%,61.7% and 76.9% respectively for the WBC suspect flags. In conclusion, the differential counting ability of Sysmex SE-9000 was acceptable for detecting abnormal or immature cells, and considered to be very useful for screening test.