• 무역상무연구
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• 제24권
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• pp.25-49
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• 2004

English contract law has traditionally taken the view that it is not the duty of the parties to a contract to give information voluntarily to each other. In English law, one of the principal distinctions between insurance contract law and general contract law is the existence of the duty of disclosure in insurance law. This article is, therefore, designed to analyse the scope or extent of the duty of disclosure and the remedy for breach of the duty in English marine insurance law. The main purpose of this article is also to seek the alternative remedy for the breach. The results of analysis are as following : First, the scope of the duty of disclosure is closely related to the test of materiality and the concept of a hypothetical prudent insurer. The assured is required to disclose only material circumstances subject to MIA 1906, s. 18(1). The test of materiality, which had caused a great deal of debate in English courts over 30 years, was finally settled by the House of Lords in Pan Atlantic and the House of Lords rejected the 'decisive influence' test and the 'increased risk' test, and the decision of the House of Lords is thought to accept the 'mere influence' test in subsequent case by the Court of Appeal. Secondly, an actual insurer is, in order to avoid contract, required to provide proof that he is induced to enter into the contract by reason of the non-disclosure of the assured. But this subjective test of actual inducement is somewhat meaningless in sense that English court takes the test of materiality as a starting point and assumes the presumption of inducement even in case of no clear proof on the inducement. Finally, MIA 1906, s. 18 provides expressly for the remedy of avoidance of the contract for breach of the duty of disclosure. This means rescission or retrospective avoidance of the entire contract, and the remedy is based upon a fairly crude 'all-or-nothing' approach. The remedy of rescission is too draconian from the point of view of the assured, because he can be deprived of all cover despite he is innocent perfectly. An inadvertent breach from an innocent mistake is as fatal as wilful concealment. What is, therefore, needed in English marine insurance law with respect to remedy for the breach is to introduce a more sophisticated or proportionate remedy ascertaining degrees of fault.

• 한국응용과학기술학회지
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• 제38권2호
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• pp.368-377
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• 2021

본 연구는 방사선 형질전환 차조기와 백출복합물(차조기 복합물)이 퇴행성관절염 관련 매개체에 미치는 영향을 확인하고자 MIA(monosodium iodoacetate)로 퇴행성관절염을 유도한 랫드로 평가하였다. 차조기 복합추출물을 2주 동안 25, 50, 100 mg/kg/day의 용량으로 경구 투여하고 랫드의 우측관절 내 공간에 MIA를 주입한 후 동일 용량을 4주 동안 지속 투여하였다. 이후, 혈청 바이오마커와 무릎 관절 분석의 형태학 및 조직병리학적 분석에 기초한 치료 효과를 평가하였다. 대조군 랫드와 비교하였을 때 차조기 복합추출물은 혈청 내 염증 및 골 대사 마커(TNF-α, MMP-3, COX-2, PGE₂, COMP, Aggrecan)의 생성량을 유의하게 감소시켰다. 이와는 반대로 연골 흡수 매개체인 CTX-2 생성을 증가시켰으며, 방사선 형질전환 차조기는 무릎 연골과 활막을 효과적으로 보존하였다. 그 결과, 차조기 복합물은 퇴행성관절염 증상을 개선하였다. 따라서, 차조기 복합물은 퇴행성관절염 관리를 위한 식품소재로 사용될 수 있다.

• The Plant Pathology Journal
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• 제15권1호
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• pp.21-27
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• 1999

Nonpathogenic mutants of Xanthomonas campestris pv. glycines were generated with Omegon-Kim to isolate genes essential for pathogenicity and inducing hypersensitive response (HR). Three nonpathogenic multants and two mutants showing slow symptom development were isolated among 1,000 colonies tested. From two nonpathogenic mutants, 8-13 and 26-13, genes homologous to hrcC and hrpF of X. campestris pv. vesicatoria were identified. The nonpathogenic mutant 8-13 had a mutation in a gene homologous to hrpF of X. campestris pv. vesicatoria and failed to cause HR on pepper plants but still induced HR on tomato leaves. The nonpathogenic mutant 26-13 had an insertional mutation in a gene homologous to hrcC of X. campestris pv. vesicatoria and lost the ability to induce HR on pepper leaves but still caused HR on tomato plants. Unlike other phytopathogenic bacteria, the parent strain and these two mutants of X. campestris pv. glycines did not cause HR on tobacco plants. a cosmid clone, pBL1, that complemented the phenotypes of 8-13 was isolated. From the analysis of restriction enzyme mapping and deletion analyses of pBL1, a 9.0-kb Eco RI fragment restored the phenotypes of 8-13. pBL1 failed to complement the phenotypes of 26-13, indicating that the hrcC gene resides outside of the insert DNA of pBL1. One nonpathogenic mutant, 13-33, had a mutation in a gene homologous to a miaA gene encoding tRNA delta (2)-isopentenylpyrophosphate transferase of Escherichia coli. This indicated that tRNA modifications in X. campestris pv. glycines may be required for expression of genes necessary for pathogenicity. The mutant 13-33 multiplied as well as the parent strain did in the culture medium and in planta, indicating that loss of pathogenicity is not due to the inability of multiplication in vivo.

• Archives of Plastic Surgery
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• 제35권6호
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• pp.637-644
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• 2008

Purpose: The survival of bone marrow derived stem cell was reported several times. But the survival of adipose tissue derived stem cells(hASCs) was not mentioned on. We studied the adipose tissue derived stem cell's survival and effect on articular cartilage in rabbits. Methods: Osteoarthritis was induced in twenty New Zealand white rabbits by intraarticular injection of monosodium iodoacetate(MIA). After four weeks, hASCs were also injected into the knee joints space without any vehicle, but the control group received phosphate buffered saline only. The histologic grade of articular cartilage was measured in 4 and 8 weeks after the transplantation of hASC and the viability of injected stem cells measured by Fluorescent in situ Hybridization (FISH) examination. Results: After 4 and 8 weeks from hASCs transplantation, histologic grade was not significantly difference between two groups(p>0.05), and the Y chromosome of the transplanted hASCs was not detected in articular cartilage. Conclusion: We found that direct injection of hASC in joint space didn't work on damaged articular cartilage repair.

• 대한한방내과학회지
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• 제40권1호
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• pp.70-88
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• 2019

Objective: This study investigated the trends in pancreatic cancer research on Korean medicine in order to establish a direction for further study. Methods: Pancreatic cancer research on Korean medicine was reviewed using databases such as OASIS, KoreanTK, KISS, RISS, KISTI, and NDSL. The search terms were "pancreatic cancer" "Korean medicine," and "herbal medicine." There was no restriction on publication dates, and the reviewed studies were analyzed according to the type of research. Results: Nineteen studies were reviewed. The numbers and types of research were as follows: 9 clinical studies including case reports, 2 review studies, and 8 in vitro studies; there was no in vivo study. Among the clinical research were 3 descriptive studies and 6 case reports. The baseline characteristics and quality of life of pancreatic cancer patients were analyzed in the descriptive studies. In the case reports, interventions such as herbal medicine, pharmacopuncture, and acupuncture were used. Research articles on the review of pancreatic cancer were titled "Preliminary Study for Development of Korean Medicine Clinical Practice Guideline for Pancreatic Cancer" and "Systemic Review on the Tumor Dormancy Therapy." Cell lines such as PANC-1, MIA PaCa-2, and AsPC-1 were used for in vitro studies. These studies have reported decreased cell viability, induced apoptosis, and changes in cancer-related gene expression. Conclusion: Through this review, we found that using Korean medicine for treating pancreatic cancer is applicable. However, due to overall limited the number of study, the benefit of Korean medicine for pancreatic cancer may be substantiated to a limited degree. Better methodological quality and large controlled trials are expected to further quantify the therapeutic effect of Korean medicine.

• Journal of Microbiology and Biotechnology
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• 제32권5호
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• pp.645-656
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• 2022

Gossypol, a natural phenolic aldehyde present in cotton plants, was originally used as a means of contraception, but is currently being studied for its anti-proliferative and anti-metastatic effects on various cancers. However, the intracellular mechanism of action regarding the effects of gossypol on pancreatic cancer cells remains unclear. Here, we investigated the anti-cancer effects of gossypol on human pancreatic cancer cells (BxPC-3 and MIA PaCa-2). Cell counting kit-8 assays, annexin V/propidium iodide staining assays, and transmission electron microscopy showed that gossypol induced apoptotic cell death and apoptotic body formation in both cell lines. RNA sequencing analysis also showed that gossypol increased the mRNA levels of CCAAT/enhancer-binding protein homologous protein (CHOP) and activating transcription factor 3 (ATF3) in pancreatic cancer cell lines. In addition, gossypol facilitated the cleavage of caspase-3 via protein kinase RNA-like ER kinase (PERK), CHOP, and Bax/Bcl-2 upregulation in both cells, whereas the upregulation of ATF was limited to BxPC-3 cells. Finally, a three-dimensional culture experiment confirmed the successful suppression of cancer cell spheroids via gossypol treatment. Taken together, our data suggest that gossypol may trigger apoptosis in pancreatic cancer cells via the PERK-CHOP signaling pathway. These findings propose a promising therapeutic approach to pancreatic cancer treatment using gossypol.

• Journal of Oral Medicine and Pain
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• 제36권4호
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• pp.261-271
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• 2011

측두하악관절에서 발생하는 골관절염은 저작시 통증, 개구제한, 관절잡음, 교합변화를 유발하여 환자의 삶의 질을 저하시키는데 관여하는 주요한 질환이다. 골관절염의 진행과정과 그에 따른 제어방법을 연구하기 위하여 다양한 연구방법이 시도되고 있다. 이 중 골조직면에서의 조직변화, 활막액의 성분변화, 활막의 조직변화, 주변조직의 변화, 통증에 대한 반응을 확인할 수 있는 동물모델이 주로 많이 이용된다. 본 연구에서는 실험동물에서 다양한 방법으로 측두하악관절 골관절염을 유도하여 하악관절표면에서 일어난 조직변화를 비교 관찰하였으며 각 동물모델의 연구 활용방안에 대하여 탐색하였다. 측두하악관절의 관절강에 monosodium iodoacetate (MIA) 와 interleukin-$1{\alpha}$(IL-$1{\alpha}$)를 직접 주입하여 약물로 관절염을 유도하여 관절조직면을 관찰하였다. 또한 여성호르몬인 에스트로겐에 의한 골변화를 확인하기 위하여 난소절제술로 인한 골다공증 유발모델에서의 하악관절을 관찰하였으며, 노화된 백서의 관절면을 확인함으로써 노화로 인한 골변화를 관찰하였다. Safranin-O 염색 법과 Masson's trichrome 염색법을 이용하여 각각의 관절면에서 세포배열의 변화, 콜라겐의 변화, 골조직의 변화 및 파괴양상에 대하여 확인하였고 Safranin-O의 양성반응을 확인하여 proteoglycans (PGs)의 조직내 분포를 추적하였다.

• 한국자원식물학회지
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• 제28권5호
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• pp.591-599
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• 2015

본 연구는 까마귀쪽나무 열매 70% 주정에탄올 추출물을 가지고 제작된 인체적용시험시료(LJTM)의 항염증 및 골관절염 biomarker의 변화를 통한 관절건강 기능성식품을 개발하기 위하여 인체적용시험시료를 제작한 후 이에 대한 유효성분의 함량을 평가하고, 인체적용시험전에 그 효력이 유지됨을 확인하기 위하여 수행되었다. 본 연구에 사용된 시료 LJTM은 NO생성이 억제되는 농도에서 세포독성이 관찰되지 않았으며, TNF-α와 IL-6 생성이 농도 의존적으로 억제되고 PGE₂를 억제하였다. 또한 동물시험에서 골관절염의 biomarker인 MMP-2, 3, 7, 9와 TIMP-1, 2에 대한 mRNA 발현이 농도 의존적으로 억제되었으며, 중추신경계 및 말초신경계에 의한 통증을 억제하는 것으로 평가되었다. 따라서 까마귀쪽나무 열매 70% 추출물이 함유된 인체적용시험시료(LJTM)는 골관절염과 진통억제에 우수한 효과가 있는 것으로 확인되었다.