• 펄프종이기술
• /
• 제48권1호
• /
• pp.111-118
• /
• 2016

The effects of pulp beating degree and bulky promotor concentration on the properties of handsheet including a bulk and strength have been investigated during manufacturing of low density paper (high bulk paper) with cationic fatty acid bulky promotor. It was found that paper bulk increased with increasing cationic fatty acid bulky agent concentration, while tensile strength decreased. On the other hand the opacity of handseets also increased with increasing cationic fatty acid bulky agent concentration, while brightness decreased slightly. With increasing pulp beating degree, paper bulk as well as tensile strength increased, while opacity decreased. Brightness did not show a significant difference with increasing pulp beating degree. The highest bulk and strength values were observed when 1.5% (SwBKP) and 2% (HwBKP) of bulky promotor was treated into the 450 mL CSF pulp slurry.

• 한국미생물·생명공학회지
• /
• 제26권1호
• /
• pp.68-75
• /
• 1998

A. niger의 GOD(Glucose Oxidase) 대량생산과 효율적인 분비를 protein의 대량생산에 많이 사용되는 strain인 S. cerevisiae에서 시도하였다. S. cerevisiae의 ADH1과 GAL 10 promotor, 그리고 ${alpha}$-MF signal sequence와 A. oryzae의 ${alpha}$-amylase signal sequence 및 S. cerevisiae의 GAL7과 A. niger의 GOD terminator를 이용하여 4개의 expression vector를 합성한 후 S. cerevisiae 2805에 auxotroph 방법으로 형질변환시켰다. 변이체들을 배양하여 세포내와 세포외의 GOD활성도를 분석한 결과 GAL 10 promotor가 삽입된 pGAL변이체들이 ADH1 promotor가 삽입된 pADH 변이체들 보다 GOD 생산성이 높았다. GAL 10 promotor와 A. oryzae의 ${alpha}$-amylase signal sequence가 삽입된 pGALGO2에서 115시간 배양시 GOD의 생산이 가장 높았다($GOD_{total}$: 10.3 unit/mL, $GOD_{ex}$: 8.7 unit/mL). 이 수치는 같은 promotor인 GAL 10 promotor와 ${alpha}$-MF signal sequence가 삽입된 pGALGO1보다 3배정도 높다. 이 결과는 ADH 1 promotor를 사용하였을 경우에도 일치하였다. 또한 A. oryzae의 ${alpha}$-amylase signal sequence가 S. cerevisiae의 ${alpha}$-MF signal sequence보다 GOD를 더 효과적으로 분비시켰다. 상기 결과로 미루어 보면 signal sequence가 단백질의 분비 외에도 단백질 합성에도 많은 영향을 주는 것으로 추측된다. pGALGO1과 pGALGO2의 GOD분비효율은 각각 89%, 84%이었다. S. cerevisiae에서는 일반적으로 과당화가 일어나기 때문에 S. cerevisiae에서 합성된 재조합 GOD의 분자량은 250 kDa으로 A. niger의 GOD(170 kDa)보다 더 컸다.

• 한국산학기술학회:학술대회논문집
• /
• 한국산학기술학회 2008년도 춘계학술발표논문집
• /
• pp.309-312
• /
• 2008

본 연구개발에서는 실리콘 오일을 가소제로 사용하지 않고 파라핀 오일과 재생 오일을 사용하고, 부착 강화제를 사용하여 실리콘 실란트를 제조하였다. 기본적인 다목적 실리콘 실란트 Formulation에 가소제인 실리콘 오일을 파라핀계 오일로 교체하여 토출성을 높여 작업성을 증진시켰으며, 접착 증진제의 교체로 무기 피착제와 폴리머와의 접착에서 각종 플라스틱, 아크릴, 폴리카보네이트 등과의 접착이 되도록 하였다. 비실리콘 오일의 교체로 기본 물성과의 차이를 극복하는 것과 접착 증진제 선택과 비율 조정이 제품화의 주요 기술이었다.

• 대한한의학회지
• /
• 제25권3호
• /
• pp.105-110
• /
• 2004

Objectives : Sasang Constitutional Medicine is based on the diversity of human beings and medically developing a variation of responses to diseases and medicines. This diversity is categorized into four concerning morphology, physiology, pathology, and pharmacology. It is supposed that sasang constitutional medicine is related the genetic diversity of individuals. Single nucleotide polymorphism is the basic tool to research genetic polymorphism as a landmark of genomes. Each constitution has different processes of pathophysiology and metabolisms to herb medications. In clinical research, the stroke incidence is significantly different by constitution. Methods : We researched whether the polymorphic expression of CCK (rs=2241997) depends on sasang constitution. The [c/t] polymorphism site of promotor region of CCK gene on 3p22-p21.3 was investigated. Results : The allele frequency of [c/t] polymorphism of CCK promotor region was different in constitution groups compared to the average allele frequency of SNP DB. The allele frequencies of Soeumin and Soyangin groups were (c:0.70/t:0.30). and (c:0.71/t:0.29), that of Taeumin group was (c:0.57/t:0.43) and of Taeyangin group was (c:1.00/t:0.00) Conclusions : It was regarded the [c/t] polymorphism of CCK promotor region is available to classify the constitution. However, it is necessary to research about CCK gene polymorphism and more constitution population groups. It is also necessary to research the more functional gene's polymorphism and sasang constitution.

• 산업기술연구
• /
• 제10권
• /
• pp.83-88
• /
• 1990

The samples used for this work were low grade c1ay($Fe_2O_3$ : 2.90%, $TiO_2$ : 1.65%) produced from Youngsan-po district, and for the iron-bearing impurities removal having a bad influence on Kaoline sample was carried out column floatatoin using Oleic acid, Potassium oleat, Aero 840 promotor, Aero 870 promotor and Keroseneas collectors. For removal of the iron-vearing impurities from the kaoline, investigated first chemical composition size distribution of Kaoline sample, also performanced a basic study on pulp density, collector and pH change on a sort of frother. The flotation separation of impurities from kaoline can be achieved by using both oleic acid and Aero 840 promotor as collectors within narrow acid limits(pH 2-3). Pine oil was more effective frother than MIBC with olelic acid as aa collector.

• Journal of Microbiology
• /
• 제35권2호
• /
• pp.149-151
• /
• 1997

A plasmid vector with combined features of yeast shuttle vector and mammalian expression vector was constructed to facilitate expression of cloned gene in both cell-types. All necessary elements required for plasmid maintenance and selection in E. coli, yeast and mammalian cells were size-economically arranged in this plasmid. The numan cytomegalovirus (CMV) immediate early promoter and yeast GAL1 promoter were sequentially placed in front of the gene to be expressed. The synthetic splicing donor and acceptor sequences were inserted into the immediate upstream and downstream of the GAL1 promotor, allowing the CMV promotor to direct the expression of a given gene in mammalian cell environment by splicing out the interfering GAL1 promotor sequence. When the resulting vector containing LacZ as a gene was introduced into yeast and mammalian cells, both cells efficiently produced .betha.-galactosidase, dimonstrating its dual host usage.

• 미생물학회지
• /
• 제30권6호
• /
• pp.460-465
• /
• 1992

The effect of PSOD expression on lacZ-sodP fusion (pYK4) was explored in Escherichia coli sodA sodB mutants (QC774) under oxidative stress. In this system, although .betha.-galactosidase activity was not fully induced by isopropyl-1-thio-.betha.-galactosidase (IPTG) and was inhibited by glucose, functional PSOD was under lacZ promotor control and was induced by IPTC, lactose, PQ and copper isons, finally, the results show that higher PSOD expression leel was consistently importnat in defending against superoxide radicals.

• Clinical and Experimental Pediatrics
• /
• 제52권4호
• /
• pp.476-480
• /
• 2009

목 적 : 저자들은 가와사키병 환아에서 TNF-alpha 유전자의 다형성을 조사함으로써 가와사키병과 유전자 다형성의 관련 여부를 알아보고, 또한 관상동맥 병변의 발생과 연관이 있는지를 살펴보려 하였다. 방 법 : 2003년 1월부터 2007년 1월까지 가와사키병 환아 51명과 대조군 48명을 대상으로 TNF-alpha 촉진자의 단일 유전자 다형성을 살펴보았으며, 가와사키병 환아 중 관상동맥 병변이 있는 24명(관상동맥병변군)과 관상동맥 이상이 없었던 27명(정상관상동맥군)에서의 유전자 다형성을 또한 비교하였다. 말초 혈액에서 DNA를 추출하여 TNF-alpha 유전자 -308 부위의 촉진자에 위치한 2개의 단일 염기 서열 G/A에 대한 대립 유전자의 다형성을 Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) 방법으로 분석하였다. 결 과 : 가와사키병 환아군에서의 -308번 TNF-alpha 유전자의 다형성은 51명 중 9명으로 17.6%였고, 정상 대조군에서는 48명 중 3명으로 6.8%로 가와사키병 환아군에서 높았으나 통계학적으로 유의성은 없었다. 가와사키병 환아 중 관상동맥병병군 24명 중 3명인 12.5%에서 유전자 다형성이 있었고 정상관상동맥군은 27명 중 6명인 22.2%로 정상관상동맥군에서 더 높은 빈도 이었으나 통계학적으로 유의하지 않았다. 결 론 : 본 연구에서는 가와사키병 환아의 TNF-alpha의 다형성과 가와사키병의 발병과의 관련성이 통계학적으로 유의한 수준은 아니지만 가와사키병 환아에서 G/A 빈도수가 17.6%으로 대조군에서 6.8% 보다 다소 높게 나타난 결과를 얻었고 앞으로 많은 수의 환아를 대상으로 한다면 유의한 차이가 있을 것으로 생각되므로 향후 대규모의 지속적인 연구가 필요할 것이다.

• 한국의류산업학회지
• /
• 제13권6호
• /
• pp.972-982
• /
• 2011

The purpose of this study is to improve the method of color developing with alkali solution as a promotor of color developing for feasible use. Cotton fabric was dyed with persimmon extract ranged with 0~3% alkali component with 5 types of strong to mild alkali solution. Heat treatment for color developing was applied to fabric dyed with persimmon extract and alkali mixing solution. Tests were carried out to analyze the change of surface color, ${\Delta},Ea^*b^*$, and water repellent of the dyed cotton fabric. The alkali mixing sample showed higher ${\Delta},Ea^*b^*$ value than control one without alkali mixing on the base of dyed fabric due to high color developing by alkali in the initial step of dyeing process. As alkali concentration increased, deeper dark color appeared on the fabric. The fabric color was changed to more dark in the application of sodium hydroxide, sodium carbonate, potassium carbonate in the initial step of dyeing process but color was not changed by increased heating time. However, the fabric showed a slight dark color with sodium acetate and more color change than that of the fabric dyed with persimmon extract without alkali. Therefore, sodium acetate seemed to a suitable promotor for color developing in persimmon extract dyeing. Property of water repellent was showed after color developing by heating with low concentration of alkali treatment.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제34권2호
• /
• pp.135-140
• /
• 2008

Loss of E-cadherin (E-cad) expression has been found in multiple cancers and is postulated to facilitate tumor cell dissociation and metastais. Promotor methylation may provides an alternative pathway for loss of gene function. This study evaluated the role of hypermethylation in the down-regulation of E-cad in oral squamous cell carcinoma (OSCC). We examined the E-cad expression by immunohistochemical staining and detected methylation status by methylation-specific polymerase chain reaction (MSP) in 20 OSCC tissues. Overally, 12 (60%) cases of hypermethylation of E-cad were detected and we found there were no correlation between methylation and age, histologic grade, lympn node metastasis, tumor size and clinical stage. However, Eleven (73.3%) of 15 samples which was negative for E-cad staining showed hypermethylation of E-cad promotor region. On the other hand, only one (20%) of 5 E-cad positive sample was observed with methylated status. The underexpression of E-cad was found to be related to promotor hypermethylation (p=0.035). In conclusion, we suggest that hypermethylation play a role in inactivation of E-cad gene and may be a appreciable biomarker for diagnosis and treatment of OSCC.