Strategies and Techniques for Liver Magnetic Resonance Imaging: New and Pending Applications for Routine Clinical Practice

Ringe Kristina I.,Yoon Jeong Hee 대한영상의학회 2023 Korean Journal of Radiology Vol.24 No.3

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Liver Transplantation

Burckhardt Ringe 한국간담췌외과학회 2005 한국간담췌외과학회 학술대회지 Vol.2005 No.3

Approaches to modelling the shape of nanocrystals

Boukouvala Christina,Daniel Joshua,Ringe Emilie 나노기술연구협의회 2021 Nano Convergence Vol.8 No.26

Unlike in the bulk, at the nanoscale shape dictates properties. The imperative to understand and predict nanocrystal shape led to the development, over several decades, of a large number of mathematical models and, later, their software implementations. In this review, the various mathematical approaches used to model crystal shapes are first overviewed, from the century-old Wulff construction to the year-old (2020) approach to describe supported twinned nanocrystals, together with a discussion and disambiguation of the terminology. Then, the multitude of published software implementations of these Wulff-based shape models are described in detail, describing their technical aspects, advantages and limitations. Finally, a discussion of the scientific applications of shape models to either predict shape or use shape to deduce thermodynamic and/or kinetic parameters is offered, followed by a conclusion. This review provides a guide for scientists looking to model crystal shape in a field where ever-increasingly complex crystal shapes and compositions are required to fulfil the exciting promises of nanotechnology.

Intra-Aneurysmal Glue Embolisation of a Giant Pulmonary Artery Pseudoaneurysm after Left Upper Lobe Lobectomy: Case Report

Ashwin Garg,Kiruthika Chandrasekaran,Sidram Jadhav,Gurbaag Chandok,Aparna Ringe,Ashwini Sankhe 대한영상의학회 2013 Korean Journal of Radiology Vol.14 No.3

We report a case of pseudoaneurysm of the anterior ascending branch of the left pulmonary artery, following a left upper lobectomy for pulmonary aspergillosis, for which we have done an endovascular treatment. This is the first case where complete pseudoaneurysm occlusion was accomplished after a transcatheter intra-aneurysmal N-butyl 2-cyanoacrylate (glue) injection.

Crystal structure of the DNA binding domain of the transcription factor T-bet suggests simultaneous recognition of distant genome sites

Liu, Ce Feng,Brandt, Gabriel S.,Hoang, Quyen Q.,Naumova, Natalia,Lazarevic, Vanja,Hwang, Eun Sook,Dekker, Job,Glimcher, Laurie H.,Ringe, Dagmar,Petsko, Gregory A. National Academy of Sciences 2016 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.113 No.43

<P>The transcription factor T-bet (Tbox protein expressed in T cells) is one of the master regulators of both the innate and adaptive immune responses. It plays a central role in T-cell lineage commitment, where it controls the T(H)1 response, and in gene regulation in plasma B-cells and dendritic cells. T-bet is a member of the Tbox family of transcription factors; however, T-bet coordinately regulates the expression of many more genes than other Tbox proteins. A central unresolved question is how T-bet is able to simultaneously recognize distant Tbox binding sites, which may be located thousands of base pairs away. We have determined the crystal structure of the Tbox DNA binding domain (DBD) of T-bet in complex with a palindromic DNA. The structure shows a quaternary structure in which the T-bet dimer has its DNA binding regions splayed far apart, making it impossible for a single dimer to bind both sites of the DNA palindrome. In contrast to most other Tbox proteins, a single T-bet DBD dimer binds simultaneously to identical half-sites on two independent DNA. A fluorescence-based assay confirms that T-bet dimers are able to bring two independent DNA molecules into close juxtaposition. Furthermore, chromosome conformation capture assays confirm that T-bet functions in the direct formation of chromatin loops in vitro and in vivo. The data are consistent with a looping/synapsing model for transcriptional regulation by T-bet in which a single dimer of the transcription factor can recognize and coalesce distinct genetic elements, either a promoter plus a distant regulatory element, or promoters on two different genes.</P>

치환에 의해서 야기되는 Benzene ring의 변형에 관한 고찰

서정선,조정랑 명지대학교 1978 明大論文集 Vol.11 No.-

The small deformations induced by subtitution in the skeletal geometry of the benzene ring are analysed in detail in a number of monosubstituted benzene derivatives. It is shown that the available structural data, which come mainly from room Temperature X-ray diffraction experiments, are unsuitable for a detailed investigation of the bond length distrbution within the ring, because of the effects of the thermal motion. They are suitable, however, for a study of the internal bond angles. The observed dependence of the ring geometry upon the σ-electronwithdrawing or-releasing properties of the substituent and the extent of its conjugation with the ring is discussed in terms of ① hybridization effects at the carbon atom at which substitution takes places ② valence shell electron pair repulsions ③ intramolecular non-bonded interactions, and ④ coulombic attractions between formally charged atoms. If appears that the experimental evidence is best rationalized in terms of either hybridization changes or valence shell electron pair repulsions.

沙土에 있어서 감자栽培의 生態的 調査硏究

李瑯雨 대구교육대학교 1974 論文集 Vol.10 No.-

Raising crops have been so far impossible on the sandy soil of rivers. But the results obtained from this test has shown that growing crops on such soil are possible with the help of chemical fertilizer and plant growth hormone through the crops thus raised are not so good in quality and quantity as those raised on the ordinary plough land. It is expected that continuing study will bring about better effect on both quality and quantity.

木材의 맞춤 技法에 關한 硏究

申朗浩,金政虎 三陟大學校 1998 論文集 Vol.31 No.3

목재의 접합이란 목재가 지니고 있는 단점을 보완하는 방법 중의 하나로서 각각의 기능이나 용도에 맞게 두 개 이상의 부재를 이어서 한 개의 부재로 접합하는 것을 이음이라 하고, 각각의 부재를 쓰임에 따라 직각 또는 경사지게 맞추는 방법을 맞춤(짜임)이라 한다. 가구나 건축에서의 맞춤은 그 정밀도에 따라서 제품의 수명도 달라지고, 같은 조건에서도 어떤 맞춤 방법을 사용하느냐에 따라 제품의 아름다움이나 질이 달라지므로 맞춤의 기법을 공정과 함께 세부적으로 인지하고 있어야 한다. 목재의 접합은 일정한 강도를 유지하는 것 외에도 힘에 대한 변위(變位)가 적어야 하며, 적절한 강성을 지녀야 하는데 구조재에 작용하는 압축, 인장, 전단 등의 응력을 파악하고 맞춤 하고자 하는 장소와 부재의 구조 방법에 따라 적절한 기법을 선택하여 사용하여야 한다. 이러한 의미에서 본 장에서는 맞춤 기법의 종류와 사용 방법 공정 등에 대하여 연구하고, 나아가 맞춤에 사용되는 공구류에 대하여도 세부적으로 살펴본다. The technique of joining is one of the most effective methods for the correction of shortcoming of woods. According to the function and the uses of it, it has two different main types. One called 'connection' is a method which is used when we want pur at least two boards together side by side, and another called 'joint' is used when we put pieces of wood together at the end of pieces at a right angle or slant. An accurate joint can make all the difference in the life span of furniture and architecture. Even though all the conditions are the same in processes, the appearances and the qualities of outcoming can be very different by the types of joint that is used. So, it is necessary to know about all the details of joining techniques along with the processes of wood working. Because joints are the places where the structures of furniture or architecture should be properly selected according to the factors like the compression stress, the expansive stress, and the conductivity of each constructions. In these senses, in this chapte, we'll study more about all the different types and the processes of joints and we'll get more specified information about tools for joining techniques as well.

華角工藝를 利用한 工藝品 開發에 關한 硏究

申朗浩 三陟大學校 1993 論文集 Vol.26 No.-

Among traditional craft arts in Korea, Wha-Gak handicraft is recognized as an orgianl craft art, because its material has been improved and developed. The author attempted to find out its historic and social background and production processes through boks and trial manufacture. The author tried to recognize its value as a traditional craft arts. As for Wha-Gak handicraft , it is intially made by sheets of thin horn paper. On this paper, various patterns are drawn with colors and attached on the object as a decoration. It was influenced by ancient Chinese Dae-Mo-Bok-Chae technique and it is estimated that these days horn paper is used instead of Dae-Mo as a main material. The oldest remain that we know are produced during the Silla Dynastry and kept at Jung Chang Won in Japna, The essence of color on Wha-Gak handicraft is pattern design and the horn paper. Judhing from patterns and colors on the remains we can understand that popular belief and story have been shaped and symbolized in limited areas. Chinese color, gold and silver foil have been used and flowers, longevity symbols, dragons, tigers, magpie tigers and jumping carps seen oncfolk painting and embroidery have been repeatedly described on the remains. These old remains are feminine articles such as sewing boxes, mirrors, Korean socks case, combs, fans, jewelry boxes and sewing measures. The reason why this Wha-Gak handicraft has been developed so slow is that its production process was difficult, it was restricted because it was regarded as aristocratic craft arts and remains could not be spread out because of horn paper's weakness. I think that recently production problems are solved by recognition of traditional craft arts, mechanized production of horn paper and development of tools.

木材의 材料分析에 關한 硏究

申朗浩,金政虎 三陟大學校 1993 論文集 Vol.26 No.-

나날이 발전해가는 경제성장과 더블어 한층 심각해져만 가는 환경오염을 피부로 느끼면서 생활하는 현대인들은 누구나가 자연 그 지체로 돌아가고 싶다는 마을을 가지리라 생각한다. 근본적인 자연 그 자체로 들어가지 못하는 마음을 현대 생활속에서 항상 접하는 어떠한 물건에서 찾는다면, 그것은 바로 인간에게 가장 자연스러운 친금감을 주는 재료인 나무로 만들어진 제품이라 하겠다. 즉, 목재는 역사가 시작된 이래 부드럽고 따뜻하며 자연스런 친금감을 준다는 질감의 특성으로 인하여 인간과 더블어 가장 밀접한 관계를 계속 유지해 왔다고 볼 수 있다. 따라서 예부터 우리나라에서는 삼면이 바다로 둘로 싸여 있고, 남북으로 길게 위치해 있다는 지리적, 위치의 특성으로 인하여 수종이 매우 다양하고 풍부하였다. 그래서 이러한 목재는 가구재나 건축재로 많이 사용되어져 왔다. 그러나 새로운 건축자재가 다양하게 발달됨으로써 목재의 사용 용도 또한 건축용재에서 장식용재 및 공예재료로 차츰 전환되어 가고 있다. 이러한 의미에서 우리가 쉽게 접할 수 있는 목재의 종류와 구조 및 성질에 관하여 연구하고, 더믈어 목재를 기본 재료로하여 만들어진 새로운 재료의 특성 및 종류에 관하여 살펴본다. Almost every modern people who is living a life getting the feel of environmental polution wit the skin that is worsening in line with the increasing economic growth, is believed to have a great mind to return to nature. If we can suggest an object which is touched in everyday life the moderns with who can not return to the orginal nature, it will be works made of wood which gives a feeling of intimacy to human beings. That is, wood is regarded to have had a close relationship with man due to its characteristic that have produced friendly feelings to man since the begining of human history. Accordingly, owing to the geographic character of our country that is surrounded by sea on all sides but one and stretches from south to north, it abound with and has a variety kind of wood. So such woods have been used as materials for building and furniture. But in accordance with various development of new building materials, the use of wood have undergone a change from the materials for building to the ones for decoration and craftwork. In this respect, the kinds, structure and character of wood which is easily touched with us, is studied and the special character and kinds of new materials that are made on the basis of wood, are examined.