• 제목/요약/키워드: Reference population size

검색결과 55건 처리시간 0.028초

Where to spot: individual identification of leopard cats (Prionailurus bengalensis euptilurus) in South Korea

  • Park, Heebok;Lim, Anya;Choi, Tae-Young;Baek, Seung-Yoon;Song, Eui-Geun;Park, Yung Chul
    • Journal of Ecology and Environment
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    • 제43권4호
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    • pp.385-389
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    • 2019
  • Knowledge of abundance, or population size, is fundamental in wildlife conservation and management. Camera-trapping, in combination with capture-recapture methods, has been extensively applied to estimate abundance and density of individually identifiable animals due to the advantages of being non-invasive, effective to survey wide-ranging, elusive, or nocturnal species, operating in inhospitable environment, and taking low labor. We assessed the possibility of using coat patterns from images to identify an individual leopard cat (Prionailurus bengalensis), a Class II endangered species in South Korea. We analyzed leopard cat images taken from Digital Single-Lense Relfex camera (high resolution, 18Mpxl) and camera traps (low resolution, 3.1Mpxl) using HotSpotter, an image matching algorithm. HotSpotter accurately top-ranked an image of the same individual leopard cat with the reference leopard cat image 100% by matching facial and ventral parts. This confirms that facial and ventral fur patterns of the Amur leopard cat are good matching points to be used reliably to identify an individual. We anticipate that the study results will be useful to researchers interested in studying behavior or population parameter estimates of Amur leopard cats based on capture-recapture models.

Complete Chloroplast Genome assembly and Annotation of Milk Thistle (Silybum marianum) and Phylogenetic Analysis

  • Hwajin Jung;Yedomon Ange Bovys Zoclanclounon;Jeongwoo Lee;Taeho Lee;Jeonggu Kim;Guhwang Park;Keunpyo Lee;Kwanghoon An;Jeehyoung Shim;Joonghyoun Chin;Suyoung Hong
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2022년도 추계학술대회
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    • pp.210-210
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    • 2022
  • Silybum marianum is an annual or biennial plant from the Asteraceae family. It can grow in low-nutrient soil and drought conditions, making it easy to cultivate. From the seed, a specialized plant metabolite called silymarin (flavonolignan complex) is produced and is known to alleviate the liver from hepatitis and toxins damages. To infer the phylogenetic placement of a Korean milk thistle, we conducted a chloroplast assembly and annotation following by a comparison with existing Chinese reference genome (NC_028027). The chloroplast genome structure was highly similar with an assembly size of 152,642 bp, an 153,202 bp for Korean and Chinese milk thistle respectively. Moreover, there were similarities at the gene level, coding sequence (n = 82), transfer RNA (n = 31) and ribosomal RNA (n = 4). From all coding sequences gene set, the phylogenetic tree inference placed the Korean cultivar into the milk thistle clade; corroborating the expected tree. Moreover, an investigation the tree based only on the ycf1 gene confirmed the same tree; suggesting that ycf1 gene is a potential marker for DNA barcoding and population diversity study in milk thistle genus. Overall, the provided data represents a valuable resource for population genomics and species-centered determination since several species have been reported in the Silybum genus.

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한국산 꿀풀과 15 분류군에 대한 유전체양 조사 (Genome size of 15 Lamiaceae taxa in Korea)

  • 이윤경;김상태
    • 식물분류학회지
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    • 제47권2호
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    • pp.161-169
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    • 2017
  • 한 생물체의 전체 유전체 크기는 계통학, 육종학, 집단유전학, 진화학과 같은 많은 분야에 활용될 수 있는 기본적인 정보이다. 최근에는 전체 유전체 결정 연구에서 특히 강조되고 있는데, 이는 최소 유전체 크기를 갖는 분류군의 선택은 유전체 결정사업의 효율성과 직접적으로 연관되어 있기 때문이다. 그러므로 유전체 연구의 선행 단계로서 연구 대상 종 및 연관된 분류군들의 유전체 양의 파악은 필수적이다. 본 연구에서는 쉽고 빠르면서도 신뢰성 있는 방법으로 알려져 있는 flow cytometry를 이용하여 한반도에 자생하는 꿀풀과의 9속 15 분류군에 대한 유전체 크기를 측정하였다. 본 연구에서 유전체 양이 측정된 15 분류군들은 모두 최초로 그 유전체 양이 조사된 분류군들로서 Plant DNA C-value Database (http://data.kew.org/cvalues/)에 수록된 바 없는데, 특히 Agastache, Clinopodium, Elsholtzia, Isodon에 속하는 분류군들은 속 수준에서의 최초의 보고이다. 골무꽃(Scutellaria indica L.)은 0.37 pg (1C)의 유전체 크기를 갖는 것으로 측정되었는데, 이는 현재까지 보고된 꿀풀과 98 분류군의 유전체 양들 중 네 번째로 유전체의 크기가 작은 분류군이다. 이에 골무꽃은 향후 유전체 연구를 위해 꿀풀과를 대표할 한국 자생종으로서 우선적으로 선택하여 분석할 수 있는 종일 것이다. 조사된 분류군들 중 가장 유전체 크기가 큰 분류군은 속단(Phlomis umbrosa Turcz.; 1C=2.6 pg)으로서 이는 다배체 형성에 의한 본 종의 기원 가능성을 제시하고 있다.

Application of DNA Microarray Technology to Molecular Microbial Ecology

  • Cho Jae-Chang
    • 한국미생물학회:학술대회논문집
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    • 한국미생물학회 2002년도 추계학술대회
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    • pp.22-26
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    • 2002
  • There are a number of ways in which environmental microbiology and microbial ecology will benefit from DNA micro array technology. These include community genome arrays, SSU rDNA arrays, environmental functional gene arrays, population biology arrays, and there are clearly more different applications of microarray technology that can be applied to relevant problems in environmental microbiology. Two types of the applications, bacterial identification chip and functional gene detection chip, will be presented. For the bacterial identification chip, a new approach employing random genome fragments that eliminates the disadvantages of traditional DNA-DNA hybridization is proposed to identify and type bacteria based on genomic DNA-DNA similarity. Bacterial genomes are fragmented randomly, and representative fragments are spotted on a glass slide and then hybridized to test genomes. Resulting hybridization profiles are used in statistical procedures to identify test strains. Second, the direct binding version of microarray with a different array design and hybridization scheme is proposed to quantify target genes in environmental samples. Reference DNA was employed to normalize variations in spot size and hybridization. The approach for designing quantitative microarrays and the inferred equation from this study provide a simple and convenient way to estimate the target gene concentration from the hybridization signal ratio.

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Association of Risk of Gastric Cancer and Consumption of Tobacco, Alcohol and Tea in the Chinese Population

  • Tong, Gui-Xian;Liang, Han;Chai, Jing;Cheng, Jing;Feng, Rui;Chen, Peng-Lai;Geng, Qing-Qing;Shen, Xing-Rong;Wang, De-Bin
    • Asian Pacific Journal of Cancer Prevention
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    • 제15권20호
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    • pp.8765-8774
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    • 2014
  • This study aimed at summarizing epidemiological research findings on associations between tobacco, alcohol and tea consumption and risk of gastric cancer (GC) in the Chinese population. The review searched PubMed, Embase, China National Knowledge Infrastructure (CNKI) and China Biology Medicine (CBM) databases and reference lists of review papers for all studies published in English or Chinese languages. Information extracted, via two independent researchers, from retrieved articles included first author, year of publication, study design, sample size, source of controls and adjusted odds ratio (OR) or relative risk (RR) with the corresponding 95% confidence intervals (CIs) for each category. Statistical analyses used software STATA version 12.0. The systematic search found 89 articles containing 25,821 GC cases and 135,298 non-cases. The overall random effects in terms of pooled OR and 95%CI for tobacco, alcohol and tea consumption were 1.62 (95%CI: 1.50-1.74), 1.57 (95%CI: 1.41-1.76) and 0.67 (95%CI: 0.59-0.76) respectively; while the heterogeneity among included studies ranged from 80.1% to 87.5%. The majority of subgroup analyses revealed consistent results with the overall analyses. All three behavioral factors showed statistically significant dose-dependent effects on GC (P<0.05). The study revealed that tobacco smoking and alcohol drinking were associated with over 1/2 added risk of GC, while tea drinking conferred about 1/3 lower risk of GC in the Chinese population. However, these results should be interpreted with caution given the fact that most of the included studies were based on a retrospective design and heterogeneity among studies was relatively high.

격자 기반의 통계정보 표현을 위한 데이터 변환 방법 (A Data Transformation Method for Visualizing the Statistical Information based on the Grid)

  • 김문수;이지영
    • Spatial Information Research
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    • 제23권5호
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    • pp.31-40
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    • 2015
  • 본 논문에서는 다양한 형태로 존재하는 통계정보를 일정한 모양과 크기를 갖는 격자로 표현하기 위해 필요한 데이터 변환 방법론에 대하여 제시한다. 격자는 기존 통계지도 서비스에서 활용하고 있는 통계공간단위인 행정구역과 집계구와 비교하였을 때 모양과 크기가 일정하여 통계정보를 객관적으로 파악할 수 있게 하며, 지도 축척 변화에 유연하게 적용될 수 있는 특징이 있다. 한편, 기존 통계지도 서비스에서는 면 보간법을 활용하여 통계공간단위로 변환하고 있는데, 이것을 다양한 형태로 존재하는 통계정보에 적용시키기 위해서는 추가적인 프로세스가 필요하다. 이에 따라, 본 논문에서는 다양한 형태로 존재하는 통계정보의 격자 변환을 위해 1)지오코딩을 통한 공간데이터로의 변환, 2)공간 관계 정의를 통한 위치정보 변환, 3)데이터 척도를 고려한 속성정보 변환을 수행하는 방법론을 정리하였다. 제시한 방법론은 서울시 A지역의 인구 밀도 통계정보를 격자로 변환하기 위해 적용하였다. 특히, 동일한 통계정보를 표현하는 참조데이터가 서로 다르더라도 유사한 격자 표현이 가능해야 함을 검증하기 위해 공간 자기상관성을 통해 분석하였다. 그 결과, 집계구와 건물을 통해 표현되는 인구 밀도를 각각 격자로 변환하였을 때, 두 데이터 모두 유사한 격자 분포를 표현함을 파악할 수 있었다. 이러한 결과를 통해 본 연구에서 제안하는 방법론은 일관된 결과를 표현할 수 있음을 확인하였다.

Current situation and future prospects for global beef production: overview of special issue

  • Smith, Stephen B.;Gotoh, Takafumi;Greenwood, Paul L.
    • Asian-Australasian Journal of Animal Sciences
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    • 제31권7호
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    • pp.927-932
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    • 2018
  • The demand for beef as a protein source is increasing worldwide, although in most countries beef accounts for considerably less than half of total meat consumption. Beef also provides a highly desirable eating experience in developed countries and, increasingly, in developing countries. The sustainability of beef production has different meanings in the various geographical and socio-economic regions of the world. Natural resources including land mass and uses, rainfall and access to livestock feed, and the robustness of the economy are major determinants of the perception of beef sustainability. In this overview of the 2016 International Symposium on "Future Beef in Asia" and this subsequent Special Edition of the Asian-Australasian Journal of Animal Sciences on "Current Situation and Future Prospects for Global Beef Production", the contributions have been grouped into the following categories: Countries in Southeast Asia; Europe; and Countries producing highly marbled beef for export and/or domestic consumption. They also include reference to Special Topics including marbled beef production, and use of "omics" technologies to enhance beef quality assurance. Among these broad categories, notable differences exist across countries in the production and marketing of beef. These reflect differences in factors including natural resource availability and climate, population size, traditional culture and degree of economic development including industrial and technological developments. We trust that the International Symposium and this Special Edition on Current Situation and Future Prospects for Global Beef Production, the contents of which that are briefly summarized in this paper, will serve as a valuable resource for the livestock industries, researchers and students with an interest in enhancing the prospects for sustainable, efficient beef production that satisfies the growing size and complexity of consumer demands and markets for beef.

Socio-economic Factors Influencing Tumor Presentation and Treatment Options in Chinese Breast Cancer Patients

  • Wang, Ke;Li, Xiao;Zhou, Can;Ren, Yu;Wang, Xian-Bing;He, Jian-Jun
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권1호
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    • pp.267-274
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    • 2013
  • The impact of income and education level on the clinical and pathologic characteristics, implementation of clinical breast examination (CBE), and treatment patterns of a small population of Chinese female breast cancer patients was studeied in order to provide a theoretical basis and statistical reference for further nationwide research. We included 484 pathologically confirmed female primary breast cancer inpatients of the First Affiliated Hospital of Medical College of Xi'an Jiaotong University from February 2003 to January 2004. All cases were reviewed and relevant information was collected using a designed case report form (CRF). Chisquare tests, rank-sum tests, and Fisher's exact tests were used in the analysis. Our analysis showed that: (1) women in different occupation groups had significant differences in tumor size, pre-operative mammography, surgical options, post-operative estrogen receptor (ER), progestin receptor (PR) and human epidermal growth factor receptor 2 (Her2) status, and post-operative radiotherapy and chemotherapy (P < 0.05); and (2) women with different education levels had statistically significant differences in tumor size, post-operative ER, PR and Her2 status, and post-operative chemotherapy, radiotherapy, and endocrine therapy (P < 0.05). In Xi'an, China, women in low-income occupations or with low education levels are more likely to have advanced tumor stages at presentation, lower implementation rate of clinical breast examination, and less treatment.

암석의 미세균열의 발달과 분포의 예측방법에 관한 연구 (Study on the Prediction of the Occurrence and Distribution of the Microcracks in Rock)

  • 백환조;김덕현;최성범
    • 터널과지하공간
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    • 제8권3호
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    • pp.226-233
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    • 1998
  • 자연적으로, 혹은 인위적으로 발생된 균열들은 현지암반의 공학적 거동에 대한 중요한 자료를 제공한다. 일정한 방향으로 분포하는 미세균열들은 암반의 물성에 현저한 영향을 미치게 되지만, 다른 요인들에 의한 이방성이 큰 경우에는 이들의 영향은 감소한다. 본 연구에서는 초음파속도의 이방성과 점하중 재하에 의한 인공균열의 진행방향을 기초로, 암석조직이 암석의 물성에 미치는 영향에 대하여 조사하였다. 암석시료는 우백질의 포천화강암 석재에서 코어링한 NX 시험편과 현장 시추코어를 사용하였다. 시료에 분포하는 균열들의 주 방향을 기준으로 설정한 후, 초음파속도의 이방성을 측정한 결과, 균열에 수직한 방향에서 초음파속도의 최소치가 측정되었다. 속도측정에 사용한 NX코어로부터 EX크기의 원판형 시험편을 성형한 수 점하중 재하실험을 수행하였으며, 점하중재하에 의한 인공균열의 진행방향은 기존의 미세균열의 방향과 거의 일치하였다.

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가정학교육 영역에서의 인구교육문제에 관한 조사연구 -선임가정학자들을 대상으로- (A Study of the Attitude of/and Problems Encountered by Senjor Home Economist Toward the Integration of Family Planning Education in the Korean Formal School System)

  • 김지화
    • 대한가정학회지
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    • 제19권3호
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    • pp.83-101
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    • 1981
  • Under the full consideration of the growing need and importance of population education in the field of home economics in Korea, the study was carried out to verify and assess the following facts on the current issues of population education of home economists who are presently engaging in teaching professions as the teachers of middle and high school and professors of college and universities by setting its primary objectives of the study as followings; 1) to assess the degree of general knowledge and attitudes of home economists toward population education in the field of home economics, 2) to verify the problems encountered in implementing population education by home economists in its field, 3) to find an existing status of previous trainings received and other activities of population education of home economists aimed at utilizing these findings as a part of reference materials when the population education is conducted in the field of home economics. In order to attain these objectives described above, the questionnaire was carefully designed to house a total of 40 questions with good combination of multiple-choice and the simple answer questions. The mail questionnaire survey was conducted by establishing teachers of home economics at middle/high schools and college/universities as Senior Home Economists(SHE) who are from public, private liberal arts and vocational schools. The rate of response observed during the survey was 45.6 percent and the findings of the survey research are as follows: 1) Examining the status of the respondents by residence and religion, it was found that 45 percent of middle & high school teachers ar.d 59. 1 percent of college professors are residing in Seoul city area and that the largest percent of them are christian in their religion. Analyzing respondents by their ages, 56 percent of middle/high school teachers are in their 30s, 45 percent of college professors are in their 40s, and 37 percent of college teachers are in their 30s. In addition, 13 percent of the total respondents are found to be unmarried. The study also revealed that 71 percent of the college professors finished Master Degree course and 82 percent of middle/high school teachers are graduated from college level lasting 4 years. Looking over the status cf major fields of respondents, 68.4 percent of middle/high school teachers are specialized in home economic education and the college professors, on the other hand, show relatively even prortion by specializing in the order of food & nutrition science, clothes & textile science and home managerial science. As far as the length of teaching experience is concerned, a relatively longer period of teaching experience is observed in the college professors in comparison with that of middle/high school teachers. In other words, 33.3 percent of middle/high school teachers are experienced in teaching from 6 to 10 years on average while 43.9 percent of college professors show more than 16 years of experience. 2) Examining the status of existing number of children cf the respondents, one boy and one daughter pattern is predominant, showing 28.5 percent in middle/high school teachers and 21.1 percent in college professors. As for the desired number of children of unmarried respondents, it is observed that 43.8 percent of middle/high school teachers desire to have one boy and one girl, and 31.3 percent of college professors want to have one child regardless of the sex. By assessing the degree of awareness of the population education through their students, it is observed that 53 percent of middle/high school teachers and 50 percent of college professors are aware of population education in some extent and that a majority of respondents took the positive attitudes toward an inclusion of family planning components into the formal school education. Another noteworthy to observe is that a total of 84.8 percent out of middle/high school teachers pointed that the population education currently conducted at schools as a part of home economics are less sufficient than it should be. 3) Analyzing the tendency as to whether the respondents were experienced in receiving population education during the time when they were students, 75 percent of college professors and 59 percent of middle/high school teachers responded negative answers in the survey. In the mean time, a total of 50 percent of the respondents replied that they began to acknowledge the importance of population education mainly through the participation of some sort of population-education orientend seminars, experienced by 40 percent of college professors and 80 percent of middle/high school teachers. 4) What it calls attention in this study was to find that 96.5 percent of middle/high school teachers and 72 percent of college professors conduct population education to some extent during their lecture hours and that more than 80 percent of them are never experienced in teaching population and family planning contents in their regular classes. It is, on the other hand, found that no more than once was the response of those who believe themselves that they are experienced in teaching these relevant components to their students. Analyzing the contents of the subjects being taught in the class, a large percent of them are found to be consisted of population and family planning contents. According to this study, the current population education through the formal school is quite inactive. Analyzing the facts, 44.9 percent of the college professors responded that the population and family planning components are quite apart from their specialization which eventually generates lack of interest in the field. 5) It is also noticed through the study that the degree of frequency of commenting on population and family planning contents during the classes was depending significantly on their specializations which means that the degree of frequency varies from a major to another. Those who majored in home managerial science was the first one, as compared to others who majored in different specializations. Glancing over the status of correlations between ages of the respondents and numbers of seminar paticipation, it is quite clear that the aged group participated more than the younger group did, and that the most highest number of participations made by college professors were those who are in 50s. In addition, it is also found that those who are aged 20s and 60s of the respondents were the group who comments least on the contents of population and family planning at their classes. The suggestions and recommendation made through this survey research are as follows. 1) No one denies that the rapid increase of population, as compared to the limited size of land and resources, will certainly affect adversly to an enhancement of individual life quality which will, eventually, bring forth the poverty of the nation. This is the reasson why we are insisting that the world population be controlled up to an optimum level with a matter of global concerns. It is our understading that the primary aim for reducing number of population is believed to be attained only by conducting the systematic and comprehensive population education through the formal schools. Therefore, the role of home economists in the field of population/family planning education is considered very importment due to the fact that an ultimate goal of population education is placed in elevating the quality of family life by having optimum number of children through family planning program. 2) It is quite clear that home economists as teachers of formal school in all level are invited to pay their attention on redefining the ultimate goal of education and that of population education. We also understant that the primary objective of population education is to change the norm and value of the clients by replenishing the students with pertinent knowledge and attitudes on population and its related problems through a sort of education in order to attain the ultimate goal for enhancing the quality of life. There is no exception in the theory of home economics. An altimate goal of home economics is to elevate the general quality of life through an establishment of value existed in daily life. Considering the relations between population education and home economics, it is quite indespensable to bandle population components as an integral part in the field of home economics. We believe, therefore, that the senior home economists positive participation in the effort population control is more needed than it has been. 3) It is also strongly urged that population education should be a part of instructor training course for home economics. In other words, the teacher of home economics should be well aware of population and its problems by teaching interrelationship between population education and home economics, needs, contents and methods of population education during the instructor training courese for home economics. In addition, the senior home economists should be encouraged through positive participation on the short term training by types of domestic and international seminar, workshop, etc. 4) We certainly believe that the population education can not sustain itself without any backing-up of information and findings' of various and comprehensive researches of natural and social sciences. Accordingly, every senior home economist is invited to exert their maximum effort to conduct systematic study with an aim to utilize these findings and information at best in population education in the field of home economics. Therefore, we consider that the development of training material is imminent in order to provide effective and efficient population education through the for training of home economies. It should be noted that these training materials must be carefully designed, tailored and developed to meet the different classes of trainees under the considerations as to whether it is easily adaptable and infusable into the curricula of every field of home economics, and it is acceptable in the degree of difficulty and quality in its contents. 5) It is true that there are many domestic and international research rapers, reports and findings in the field of population education and family planning. However, there is a tendency that the most of research papers are heavily relying on the authors intension and preferences in its expression and publication. Under these circumstances, it is urged that the home economists should aware of the growing need of the technical training in order to keep these available information and research findings reprocessed and redesigned to insure the practical application into the population education in the field of home economics in Korea.

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