• Title/Summary/Keyword: Case Investigation

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Aberrant Methylation of p16 Tumor Suppressor Gene and Death-Associated Protein Kinase in Non-Small Cell Lung Carcinoma (비소세포폐암 조직에서 p16 종양억제유전자와 Death-Associated Protein Kinase의 Aberrant Methylation의 양상)

  • Kim, Yun-Seong;Lee, Min-Ki;Jung, Kyung-Sik;Kim, Ki-Uk;Kim, Young-Dae;Lee, Hyung-Ryul;Lee, Chang-Hoon;Seok, Ju-Won;Kim, Yong-Ki;Jun, Eun-Sook;Choi, Young-Min;Rha, Seo-Hee;Park, Soon-Kew
    • Tuberculosis and Respiratory Diseases
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    • v.51 no.2
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    • pp.108-121
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    • 2001
  • Background : The $p16^{INK4a}$ (p16) twnor suppressor gene is frequently inactivated in hwnan non-small cell lung cancers (NSCLCs), predominantly through homozygous deletion or in association with aberrant promotor hypermethylation. Death-associated protein kinase (DAPK) gene influences interferon $\gamma$-induced apoptotic cell death and has important role in metastasis of lung cancer in animal model. Hypermethylation of promoter region of DAP kinase gene may suppress the expression of this gene. Methods : This study was performed to investigate the aberrant methylation of p16 or DAP kinase in 35 resected primary NSCLCs by methylation-specific PCR (MSP), and demonstrated frequency, diagnostic value and clinical implication of aberrant methylation of two genes. Results : Thirty-two cases were male patients, and 3 cases were female patients with an average age was 57. $8{\pm}10.5$ years. The histologic types of lung cancer were 22 of squamous cell carcinoma, 12 of adenocarcinoma, 1 of large cell carcinoma. Pathologic stages were 11 cases of stage I (1 IA, 10 IB), 13 cases of stage II (1 IIA, 12 IIB), and 11 cases of stage III (9 IIIA, 2 IIIB). Regarding for the cancer tissue, p16 aberrant methylation was noted in 13 case of 33 cases (39.4%), DAP kinase in 21 cases of 35 cases (60%). Age over 55 year was associated with p16 aberrant methylation significantly (p<0.05). Methylation status of two genes was not different by smoking history, histologic type, size of tumor, lymph node metastasis and disease progression of lung cancer. There was no correlation between p16 and DAP kinase hypermethylation. Conclusion: This investigation demonstrates that aberrant methylation of p16 tumor suppressor gene or DAP kinase showed relatively high frequency (74.3%) in NSCLCs, and that these genes could be a biologic marker for early detection of lung cancer.

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Effect of LED Light Wavelength on Lettuce Growth, Vitamin C and Anthocyanin Contents (LED광 파장이 상추생육과 비타민 C 및 안토시아닌 함량에 미치는 영향)

  • Choi, Man Kwon;Baek, Gyeong Yun;Kwon, Soon Joo;Yoon, Yong Cheol;Kim, Hyeon Tae
    • Journal of Bio-Environment Control
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    • v.23 no.1
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    • pp.19-25
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    • 2014
  • In this study, we analyzed the growth characteristics of red lettuce under Light-emitting diode (LED) light environment as well as the change of vitamin C and anthocyanins of lettuce. We made five monochromatic light treatments (red 647 nm, 622 nm, blue 463 nm, 450 nm, White), six mixed red (R) and blue (B) light treatments (R : B = 9 : 1, 8 : 2, 7 : 3, 6 : 4, 5 : 5) and red + white, and three light treatments made according to photoperiod of LED with lighting sources ratio of red : blue (R : B = 8 : 2(18/06 h, 15/09 h, 12/12 h)). It was composed of totally 14 control beds. As a result, the red lettuce the most developed leaf height, leaf numbers and fresh weight under red single light, root length and leaf developed when grown under blue single light. Therefore, red light were related to above part of the lettuce, blue light were related to the growth of the underground part of lettuce. Case of the mixed light, leaf height, leaf numbers, fresh/dry weight of above and underground part were highest red + white light and root length and chlorophyll content were highest under red 7 : 3 blue light. Result of growing investigation by photoperiod, the red lettuce were considered to be most effective in 15/09 h (on/off). The content of anthocyanins; the single light source, mixed light and light irradiation period were highest under blue light (463 nm), red 7 : 3 blue and 18/06 h (on/off) light irradiation, respectively. The vitamin C showed the lowest content of $1.26mg{\cdot}L^{-1}$ under the white light, but showed the greatest content of $3.02mg{\cdot}L^{-1}$ for the control group.

A Study on the Religious Costume in Korea - Buddhist and Taoist Costume - (한국(韓國) 종교복식(宗敎服飾)에 관(關)한 연구(硏究) - 불교(佛敎)와 도교복식(道敎服飾)을 중심(中心)으로 -)

  • Im, Yeong-Ja
    • Journal of the Korean Society of Costume
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    • v.14
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    • pp.63-73
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    • 1990
  • The thought of three religious, Confucianism, Buddhism, and Taoism, had been the mainaxis of Korean spirit of the past. This study is centered on Buddhist and Taoist costume. There have been a lot of studies on Korean costume from many viewpoints. However, there have been few approaches to the inner !"ide of it. That is to say, the research on spiritual back-ground or religious correlation has not done yet. And especially, we are wholly lacking the studies on Taoist costume. In this dissertation, I investigate how they had come to wear Buddhist costume and how it trans, on the basis of related documentary records and existing remains. I also inquiry Taoist costume which was worn at Taoist ceremony in our country, with the help of Korean books and documents and of the sources of Packwoonkwan in China. In the case of Topobyunjeung in Korean costume, in particular, we can catch the source of it only after studying the religious side of Taoist costume and Buddhist costume. As revealed in the theory of Topobyunjeung in Ojuyunmoonja-ngsango by Lee, Kyu Kyung, even old masters and great Confucianists could not know whether Topo, the ordinary clothes of the Sadaeboo, originated from Taoist costume or Buddhist costume. There have been many opinions about the origin, but even now it is true that no one has made it clear. Therefore in this dissertatio I demonstrate mainly how Topo and Hakchangeui appeared in Korean costume through Taoist costume. It is said that Taoists, Buddhists, and literary men wore Topo, Chickchul, and Chickshin in Song dynasty of China. Topo was a clerical robe of Taoists and was also an ordinary clothes. Chick-chul was a clerical robe of Buddhists, and Chick-shin was worn by Zen priests in Won dynaty. Over the Po, Buddhist wore a large robe, namely Kasa, and Taoist wore Packhakchang like Wooeui, when they attended at the religious ceremony. And they regarded such manner of dressing as ceremonial full-dress attire. The style of Topo in China was Saryunggyogeo. The is th say that they put the black Yeon along Sajoo, which are Young, Soogoo, Keum, and Keo, and that they wore Sajodae around their waists so as to let the band down in front of them. Our existing type of Topo is that of Chickryung-gyoin. The characteristics of the type are its Koreum hung on the dress, no Yeon along Sajoo, and Soopok at the back of the dress. And when they put on the dress, they wear Saejodae around their waists. These characteristics considered, we can find the source of Topo from the Po of Chickshin among Buddhist costume. Other types of Topo are those that were transformed elegantly according to our national manners and customs in our country. So-called Wooeui in Chiness Taoism is Hakchang. Originally it was made by weaving for of cranes or other feathered birds. Its remarkable feature is the wide sleeves. Later they called such a robe with wide sleeves Hakchang. Our hakchangeui has Yeon along Sajoo and a belt around waist. We can guess that the features of Topo and wide-sleeved Hakchang mingled and turned into Hakchangeui. Or it might also be that Topa worn by Taoist was regarded as Hakchang and Topa which has Yeon along Sajoo was regarded as Hakchangeui in our country. Such type of Hakchang worn by Taoists was well shown in the Buddhist and Taoist paintings among "The Pictures of Hills, Waters, and Folks" in the latter half of the 16th century. In China Hakchang with a belt around waist could not be seen. Comparing our style of Hakchangeui with the Chinese style, we can recognize the former was similar to that of Chinese Topa. From this, we gather that Topa was regarded as Hakchang, Wooeui worn by Taoists, Ascetics and True Men in Korea. Furthermore I also gather that our Hakchangeui, which has Tongjeong, Koreurn and a belt around waist, was a transformed style in our own country. From the above, we can realize that in costume the three religions, Confucianism, Buddhism, and Taoism, cannot be treated separately although they are different each other in the essential thought. We have to recognize that Korean Costume was established under the closely connected correlation among the religions and that it was transfigured and accepted according to the cultural characteristics. This study is significant in that it is the first attempt to understand Korean costume through the religous approach, which has never been made in our Korean costume studies. We are demanded even more wide and profound investigation on the religious side of costume throughout the general field of costume studies.

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A Study on the Decision Point and a Standard of Judgment under the Duty of Inter-hospital Transfer for Patients of Doctor - Focused on the Trend of Supreme Court's Decisions - (의사의 전원의무(轉院義務) 위반 여부의 판단기준과 전원시점 판단 - 판례의 동향을 중심으로 -)

  • Choi, Hyun-tae
    • The Korean Society of Law and Medicine
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    • v.20 no.1
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    • pp.163-201
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    • 2019
  • Doctor has the duty of an inter-hospital transfer, known as inter-facility or secondary transfer, when the diagnostic and therapeutic facilities required for a patient are not available at the given hospital. Also, the decision to transfer the patient to an another facility is rely on whether ill patient is the benefits of care, including clinical and non-clinical reasons, available at the another facility against the potential risks. Crucial point to note is that issues about 'inter-hospital transfer' is limited to questions occurred in the course of transfer between emergency medicals (facilities). 'emergency medical (facility)' is specified by Medical Law, article 3 and the duty of an inter-hospital transfer includes any possible adverse events, medical or technical, during the transfer. Because each medical facility has an different ability to care for a patient in an emergency condition, coordination between the referring and receiving hospitals' emergency medicals would be important to ensure prompt transfer to the definitive destination avoiding delay at an emergency. Simultaneously, transfer of documents about the transfer process, medical record and investigation reports are important materials for maintaining continuity of medical care. Although the duty of an inter-hospital transfer is recognized as one of duty of doctor and more often than not it occurs, there is constant legal conflict between a doctor and a patient related to the duty of the inter-hospital transfer. Therefore, we need clear and specific legal standard about the inter-hospital transfer. This paper attempts to review the Supreme Court's cases associated to the inter-hospital transfer and to compare opinion of the cases with guideline for an inter-hospital transfer already given. Furthermore, this article is intended to broaden our horizons of understanding the duty of an inter-hospital transfer and I wish this article helps to resolve the settlement and case dealt with the duty of inter-hospital transfer.

The Effect of Creeping Bentgrass Growth on Greenspeed (그린잔디의 생육이 그린스피드에 미치는 영향)

  • Kwon, Il-Woo;Lee, Dong-Hee;Choi, Byuong-Man;Tae, Hyun-Sook;Shin, Dong-Hyun
    • Asian Journal of Turfgrass Science
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    • v.25 no.2
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    • pp.223-228
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    • 2011
  • This research was performed to investigate change of green speed according to growth of grass, for this, the method of effective green management for improvement of green speed was searched by investigating green density, soil moisture, surface hardness, and mowing height every day for 6 months. As the result of the study, reliability between, green density, soil moisture, surface hardness, mowing height and green speed were measured to be respectively 0.4742, 0.5690, 0.4632, 0.2806, i.e. soil moisture is considered as the factor which affects green speed the most. Therefore, it will be an advantageous environment to maintain soil moisture a little bit low to improve green speed within the range that does not disrupt the growth of green. In case of green density, it is considered to be effective to get a fast green speed when obtaining enough density during May~June, the most vigorous growth period and at the same time green up period. Surface hardness was confirmed that management work as rolling is a considerably effective method to increase hardness. However, rolling gives high stress to the green, combining another management work as regular hilling could be a good alternative. Reliability of green preview and green speed was 0.2806, lower than soil moisture or surface hardness. Through the results, it was confirmed that management of mowing height to be low less than 3.00 mm is helpful to improve green speed, timely, and it is advantageous to manage green speed when adjusting mowing height during the vigorous growth period of bent grass. However, considering the range of mowing height was not various, being 2.9~3.4 mm, henceforth research on investigation of green speed at more various mowing heights would be necessary. Consequently, except mowing height, other three factors, i.e. green density, soil moisture and surface hardness were investigated to have considerable level of reliability on green speed, and it is considered that each factor affects green speed respectively according to green condition and time. Accordingly, in order for the manager to maintain high speed all year round, intensive care for each factor per time unit considering green growth condition is considered to be necessary.

Role of MYH Polymorphisms in Sporadic Colorectal Cancer in China: A Case-control, Population-based Study

  • Yang, Liu;Huang, Xin-En;Xu, Lin;Zhou, Jian-Nong;Yu, Dong-Sheng;Zhou, Xin;Li, Dong-Zheng;Guan, Xin
    • Asian Pacific Journal of Cancer Prevention
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    • v.14 no.11
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    • pp.6403-6409
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    • 2013
  • Purpose: Biallelic germline variants of the 8-hydroxyguanine (8-OG) repair gene MYH have been associated with colorectal neoplasms that display somatic $G:C{\rightarrow}T:A$ transversions. However, the effect of single germline variants has not been widely studied, prompting the present investigation of monoallelic MYH variants and susceptibility to sporadic colorectal cancer (CRC) in a Chinese population. Patients and Methods: Between January 2006 and December 2012, 400 cases of sporadic CRC and 600 age- and sex-matched normal blood donors were screened randomly for 7 potentially pathogenic germline MYH exons using genetic testing technology. Variants of heterozygosity at the MYH locus were assessed in both sporadic cancer patients and healthy controls. Univariate and multivariate analyses were performed to determine risk factors for cancer onset. Results: Five monoallelic single nucleotide polymorphisms (SNPs) were identified in the 7 exon regions of MYH, which were detected in 75 (18.75%) of 400 CRC patients as well as 42 (7%) of 600 normal controls. The region of exon 1 proved to be a linked polymorphic region for the first time, a triple linked variant including exon 1-316 $G{\rightarrow}A$, exon 1-292 $G{\rightarrow}A$ and intron 1+11 $C{\rightarrow}T$, being identified in 13 CRC patients and 2 normal blood donors. A variant of base replacement, intron 10-2 $A{\rightarrow}G$, was identified in the exon 10 region in 21 cases and 7 controls, while a similar type of variant in the exon 13 region, intron 13+12 $C{\rightarrow}T$, was identified in 8 cases and 6 controls. Not the only but a newly missense variant in the present study, p. V463E (Exon 14+74 $T{\rightarrow}A$), was identified in exon 14 in 6 patients and 1 normal control. In exon 16, nt. 1678-80 del GTT with loss of heterozygosity (LOH) was identified in 27 CRC cases and 26 controls. There was no Y165C in exon 7 or G382D in exon 14, the hot-spot variants which have been reported most frequently in Caucasian studies. After univariate analysis and multivariate analysis, the linked variant in exon 1 region (p=0.002), intron 10-2 $A{\rightarrow}G$ (p=0.004) and p. V463E (p=0.036) in the MYH gene were selected as 3 independent risk factors for CRC. Conclusions: According to these results, the linked variant in Exon 1 region, Intron 10-2 $A{\rightarrow}G$ of base replacement and p. V463E of missense variant, the 3 heterozygosity variants of MYH gene in a Chinese population, may relate to the susceptibility to sporadic CRC. Lack of the hot-spot variants of Caucasians in the present study may due to the ethnic difference in MYH gene.

암환자 인식에 관한 연구 - 간호사ㆍ의사를 중심으로

  • Jo, In-Hyang
    • Korean Journal of Hospice Care
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    • v.2 no.1
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    • pp.58-74
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    • 2002
  • This paper constitutes a descriptive investigation and used a structured questionnaire to investigate nurses' and doctors' recognition of cancer patients. The subjects were extracted from the medical personnel working at the internal medicine, the surgery ward, the obstetrics and gynecology department, the pediatrics department, the cancer ward, and the emergency room of five general hospitals located in Seoul and Gyeonggi Province. The research lasted from August, 2001 to September 2001. Total 137 nurses and 65 doctors were included and made out the questionnaires directly distributed by the investigator. The study tool was also developed by the investigator and consisted of such items as the demographic and social characteristics, the medical personnel's recognition degree of cancer and cancer patients, their recognition of the management of cancer patients, and their participation in a hospice. The results were analyzed using the SPSS Window program in terms of technological statistics, ranks, t-test, and ANOVA. The reliability was represented in Cronbach' α=.75. The nurses' and doctors' recognition degree of cancer and cancer patients had an overall average of 3.86 at the 5 point-scale. The items that received an average of 4.0 or more included 'Medical personnel should explain about the cancer cure plans to the cancer patient and his or her family', 'A patient whose case has been diagnosed as a terminal cancer should be notified of it, 'If I were a cancer patient, I would want to get informed of it,' and 'Cancer shall be conquered whenever it is'. In the meantime, the items that received an average of 3.0 or less was 'My relationship with the cancer patient's family has gotten worse since I announced his or her impending death.' And according to the general characteristics and the difference test, the recognition degree of cancer and cancer patient was high among the subgroups of nurses, females, married persons, who were in their 30s, who had a family member that was a cancer patient, and who received a hospice education. The biggest number of the nurses and doctors saw 'a gradual approach over several days'(68.8%) as a method to tell a cancer patient about his or her cancer diagnosis or impending death. Those who usually tell tragic news were the physician in charge(62.8%), the family members or relatives(32.1%) and the clergymen(3.8%) in the order. The greatest number of them recommended a cancer patient's home as the place where he or she should face death because they thought 'it would stabilize his or her mentality'(91.9%) while a number of them recommended the hospital because they 'should give the psychological satisfaction to the patient'(40%) or 'should try their best until the last moment of the patient's death'(30%). A majority of the medical personnel regarded 'smoking or drinking' and 'diet' as the causes of cancer. The biggest symptom of a cancer patient was 'pain' and the pain management of a cancer patient was mostly impeded by the 'excessive fear of drug addiction, tolerance to drugs and side effects of drugs' by medical personnel, the patient, and his or her family. The most frequently adopted treatment plan of a terminal cancer patient was 'to do whatever the patient or his or her family wants' to resort to a hospice' and 'to continue active treatment efforts' in the order. The biggest reasons why a terminal cancer patient went to see a doctor were 'pain alleviation' 'control of symptoms other than pain(intravenous supply)' and 'incapability of the patient's family' in the order. Terminal cancer patients placed their major concern in 'spiritual(religious) matter' 'emotional matters' their family' 'existence' and 'physical matters' in the order. 113(58.5%) of the whole medical personnel answered they 'would recommend' an alternative treatment to a terminal cancer patient mostly because they assumed it would 'stabilize the patient's mentality.' Meanwhile, 80(41.5%) of them chose 'not to recommend it mostly due to the unverified effects and high cost of it(78.7%). A majority of them, I. e. 190(94.1%) subjects said they 'would recommend' a hospice to a terminal cancer patient mostly because they thought it would help the patient to 'mentally prepare'(66.6%) Only 17.3% of them, however, had received a hospice education, most of which was done through the hospital duty education(41.4%) and volunteer training(34.5%). The follows are results of this study: 1. The nurses and the doctors turned out to be still passive and experience confusion in dealing with a cancer patient despite their great sense of responsibility for him or her. 2.Nurses and Doctors realize the need of a hospice, but an extremely small number of them participate in a hospice education or performance. Thus, a whole recognition of a hospice should be changed, for which purpose a hospice education for nurses and doctors should be provided. 3.Terminal cancer patients preferred their home to a hospital as the place to face their impending death because they felt it would bring 'mental stability.' And most of nurses and doctors think it would be unnecessary for them to be hospitalized just for control of their symptoms. Accordingly a terminal cancer patient can be cared at home, and a home hospice care needs to be activated.

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Analysis of the Location Environment of the Sub-alpine Coniferous Forest in National Parks Using GIS - Focusing on Abies koreana - (GIS를 활용한 국립공원 아고산대 침엽수림의 입지환경 분석 - 구상나무를 대상으로 -)

  • Kim, Tae-Geun;Oh, Jang-Geun
    • Korean Journal of Ecology and Environment
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    • v.49 no.3
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    • pp.236-243
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    • 2016
  • It was a case study to use as a basic data for efficient the preservation and management of subalpine coniferous forest in national parks. It is based on inhabitation condition of 210 individuals of Abies koreana Wilson that was found through local investigation in the sub-alpine zone of Jirisan National Park and Songnisan National Park. It analyzed the effect of the geographical location and topographical features, which are the basics of location environment, on the growth of A. koreana. The variables related to the growth of A. koreana are tree height and diameter at breast height. Topographical features include geographical longitude, altitude above sea level, slope of the mountains, aspect that describes the direction in which a slope faces and topographical wetness index. Topographical features were extracted through GIS spatial analysis. It used canonical correlation analysis to estimate whether the two variables groups have related to each other and how much they are related, if any, and estimated the effect of the geographical and topographical features on the growth structure of A. koreana using multiple regression analysis. The tree height and diameter at breast height that represent the growth structure of A. koreana show greater relation to geographical latitude distribution than topographical feature and the geographical and topographical factors show greater relation to diameter at breast height than tree height. The growth structure's variable and geographical and topographical variable of A. koreana have meaningful relation and the result shows that geographical and topographical variables explain 18.1% of the growth structure. The variables that affect the diameter at breast height of A. koreana are geographical latitude, topographical wetness index, aspect and altitude, which are put in order of statistical significance. The higher the latitude is, the smaller the diameter at breast height. Depending on the topographical feature, it becomes bigger. The variable that affects the tree height is topographical wetness index, which was the only meaningful variable. Overall, the tree height and diameter at breast height that are related to the growth structure of A. koreana are affected by geographical and topographical feature. It showed that the geographical feature affected it the most. Especially the effect of water among the topographical features is expected to be bigger than the other topographical factors. Based on the result, it is expected that geographical and topographical feature is an important factor for the growth structure of A. koreana. Even though it considered only the geographical and topographical features and used spatial analysis data produced by GIS, the research results will be useful for investigating and researching the growth environment of coniferous forest inhabiting in sub-alpine zone of national parks and are expected to be used as basic data for establishing measures to efficiently manage and preserve evergreen needleaf tree such as A. koreana.

Clinical Features of Dietary Protein Induced Proctocolitis (식이 단백 유발 직결장염의 임상적 고찰)

  • Im, Sun Ju;Kim, Seong Heon;Bae, Sang Nam;Park, Jae Hong
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • v.8 no.2
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    • pp.157-163
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    • 2005
  • Purpose: Dietary protein induced proctocolitis (DPIPC) can be considered as a cause of rectal bleeding or blood streaked stool in otherwise healthy-looking infants in the first several months of life. Failure to appreciate this entity may lead to inappropriate diagnostic or therapeutic intervention. This study aimed to ascertain the clinical features, treatment and prognosis of DPIPC. Methods: We reviewed 13 infants retrospectively, presented with bloody stool in early infancy. They were diagnosed as DPIPC clinically in Pusan National University Hospital from May 2002 to June 2004. Results: Seven males and six females were included. The mean age at onset of bleeding was $96.8{\pm}58.8days$. The mean frequency of hematochezia was $2.6{\pm}2.5$ times a day. Duration from onset of symptom to diagnosis was $35.5{\pm}55.0days$ and duration from onset of symptom to resolution of bleeding was $58.7{\pm}67.0days$. Nine (69.2%) were exclusively breast-fed infants and two (15.4%) were formula-fed infants. All but one infant did not have family history of other allergic diseases. A dietary history of ingestion of cow's milk, nut or shellfish was present in three mothers. Peripheral eosinophil count was normal to slightly elevated (total WBC count $10,555{\pm}3,145/mm^3$, relative eosinophil count $6.3{\pm}3.0%$, absolute eosinophil count $659.0{\pm}532.2/mm^3$). Sigmoidoscopy revealed lymphonodular hyperplasia with surrounding hemorrhagic spots in the rectosigmoid colon in 6 infants. Histopathologic finding of colonic biopsies in 5 infants showed chronic inflammation with lymphoid follicular hyperplasia (5 infants), crypt abscess (3 infants), or mild infiltration of eosinophils (less than 20/high power field) in the lamina propria. Spontaneous resolution of rectal bleeding occurred in all infants without dietary change or medicine. Conclusion: Most infants with DPIPC experience a very benign course and have spontaneous resolution of rectal bleeding without changes in the mother's diet. In the case of strong evidence for DPIPC we suggest deferring further invasive investigation and continuing breast feeding.

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Role Formation by Interaction Function and Pattern for Group Discussion Activity using the case of Environmental Education Camp for Undergraduate Student (대학생 환경교육캠프 사례에서의 집단 토의 활동에 있어서 상호작용 기능과 양상에 따른 역할 형성 양상)

  • Jung, Won-Young;Lee, Go-Eun;Shin, Hyeon-Jeong;Cha, Hyun-Jung;Kim, Chan-Jong
    • Journal of The Korean Association For Science Education
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    • v.32 no.4
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    • pp.555-569
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    • 2012
  • Many science education research and practices are recently emphasizing the importance of collaborative learning. This study also understands learning in aspects of socio-cultural context, and regarded the creation of meaning in a same-age group as an important learning process. This is most especially true in the premise that the formation of roles in a collaborative learning is important for successful interactive learning. This study aims to find out how roles form in a group. For this purpose, university students participating in a group discussion activity about energy flow and circulation of material were selected as research participants. Discussions among the nine students in one group consisted of cognitive conversations on the topic and operational conversations for preparing a presentation. Video-clips of the discussions were made and transcribed. For the analysis, we developed a framework that includes four interaction functions (cognitive, organizational, meta-cognitive, operational), four action elements (question, simple answer, providing opinion, response to opinion), and two to four intention elements by each action elements. As a result, a total of nine roles were revealed through the interaction function and element; cognitive questioner, operational questioner, simple answerer, operational suggester, organizational commander, operational commander, cognitive explainer, terminator, reflective thinker. These roles are re-classified into seven utterance patterns by the utterance order and object, and they were categorized into three role groups (facilitating interaction, sustaining interaction, finishing interaction). The result means that role formation and function can have influence on learning and interaction. This study is meaningful to the suggestion to collaborative learning including project-based learning, investigation, club activity, and for the re-illumination of the role in an aspect of the interaction.