• 제목/요약/키워드: evenness

검색결과 472건 처리시간 0.024초

Associations of physical activity with gut microbiota in pre-adolescent children

  • Santarossa, Sara;Sitarik, Alexandra R.;Johnson, Christine Cole;Li, Jia;Lynch, Susan V.;Ownby, Dennis R.;Ramirez, Alex;Yong, Germaine LM.;Cassidy-Bushrow, Andrea E.
    • 운동영양학회지
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    • 제25권4호
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    • pp.24-37
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    • 2021
  • [Purpose] To determine whether physical activity (PA), primarily the recommended 60 minutes of moderate-to-vigorous PA, is associated with gut bacterial microbiota in 10-year-old children. [Methods] The Block Physical Activity Screener, which provides minutes/day PA variables, was used to determine whether the child met the PA recommendations. 16S rRNA sequencing was performed on stool samples from the children to profile the composition of their gut bacterial microbiota. Differences in alpha diversity metrics (richness, Pielou's evenness, and Faith's phylogenetic diversity) by PA were determined using linear regression, whereas beta diversity (unweighted and weighted UniFrac) relationships were assessed using PERMANOVA. Taxon relative abundance differentials were determined using DESeq2. [Results] The analytic sample included 321 children with both PA and 16S rRNA sequencing data (mean age [SD] =10.2 [0.8] years; 54.2% male; 62.9% African American), where 189 (58.9%) met the PA recommendations. After adjusting for covariates, meeting the PA recommendations as well as minutes/day PA variables were not significantly associated with gut richness, evenness, or diversity (p ≥ 0.19). However, meeting the PA recommendations (weighted UniFrac R2 = 0.014, p = 0.001) was significantly associated with distinct gut bacterial composition. These compositional differences were partly characterized by increased abundance of Megamonas and Anaerovorax as well as specific Christensenellaceae_R-7_group taxa in children with higher PA. [Conclusion] Children who met the recommendations of PA had altered gut microbiota compositions. Whether this translates to a reduced risk of obesity or associated metabolic diseases is still unclear.

Characterization of the Distribution of Indicator Species Beetles in the Mt. Mangunsan Area

  • Junsu Kim;Man-Leung Ha;Hyun Kim;Chong Kyu Lee
    • Journal of Forest and Environmental Science
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    • 제40권2호
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    • pp.82-89
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    • 2024
  • This study aimed to investigate habitat distribution and beetle diversity, using beetles as biological indicator species to assess environmental changes in the Mt. Mangunsan area near the South Sea of Korea. Plots were installed at varying elevations on the southern and northern slopes of Mt. Mangunsan, and the beetle species composition was determined. A total of 1,368 beetles comprising 32 species belonging to ten families were collected between May and September 2023 from the study sites in the Mt. Mangunsan area near the South Sea of Korea. The two most prevalent species consisted of Synuchus nitidus, with 152 collected beetles, and Calosoma chinense, with 128 collected beetles. In May, June, July, August, and September, 76 beetles comprising 10 species, 180 beetles comprising 18 species, 138 beetles comprising 15 species, 525 beetles comprising 27 species, and 449 beetles comprising 25 species were collected, respectively, with the highest abundance observed in August. In terms of elevation, 239 beetles comprising 19 species were collected at 300 m; 352 beetles comprising 27 species at 400 m; 314 beetles comprising 24 species at 500 m; 280 beetles comprising 22 species at 600 m; 183 beetles comprising 16 species at 700 m. Based on the slope, 442 beetles comprising 18 species belonging to eight families were collected on the southern slope, and 926 beetles comprising 24 species belonging to 10 families were collected on the northern slope. Analysis of the beetles on the southern slope produced the following estimations: diversity of 1.086, evenness of 0.866, and dominance of 0.109. Meanwhile, those in the northern slope yielded a diversity of 1.204, evenness of 0.873, and dominance of 0.081.

전기로슬래그 혼합골재를 이용한 조기교통개방이 가능한 연속 적층식 상온 아스팔트포장 유지보수 공법 (Early Traffic Opening-Capable Continuous Multi-Layer Asphalt Pavement Maintenance Method Using Electric Arc Furnace Slag Aggregate and Emulsified Asphalt)

  • 김완상;이석홍;권문현;최도선
    • 한국방재학회:학술대회논문집
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    • 한국방재학회 2007년도 정기총회 및 학술발표대회
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    • pp.117-120
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    • 2007
  • The main purpose of this paper is to introduce the early traffic opening-capable continuous multi-layer asphalt pavement maintenance method using electric arc furnace slag aggregate and emulsified asphalt to the actual construction sites. As well known, the previous surface treatment method of emulsified asphalt mixture have various shortcomings such as long work-time, traffic congestions, plastic deformation and poor evenness. Thus, the proposed method has enabled tile early traffic opening by utilizing the optimized emulsified asphalt after consideration of the climate and road conditions in Korea. The application of the electric furnace slag with $6\;{\sim}\;18\;mm$ thickness is helpful to become a environment-friendly construction method. And also, it has been improved enough to accommodate night-time works of mechanized construction activities for wearing course and control course.

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Christian Dior 오뜨꾸띄르의 디자인 오리지날리티 (Design Originality of Christian Dior's Haute Couture)

  • 공미선;채금석
    • 복식
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    • 제53권2호
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    • pp.57-70
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    • 2003
  • Modern Haute Couture represents artistic views through its image. symbol, and originality. Haute Couture's original art has been kept as a design technics which is the fusion of timely, original Maison's concept, plastic beauty as designer's personality. Christian Dior's maison continued by Yves Saint Laurent, Marc Bohan, Gianfranco Ferr'e and John Galliano who emphasize elegant image which has avant-garde trends came from post modernism. Christian Dior Haute Couture's design which can be symbolized by the feature of timely variation and new feeling of continuing designers has the following originalities. 1. Christian Dior Haute Couture's design has been affected by the timely art-trends. 2. Christian Dior Haute Couture's design concept is represented as Nobly Chic Elegance. Feminine Elegance. Sophisticately Chic Elegance, Fantastically humourous Elegance therfore, the traditional concept of Elegance are maintained. 3. Christian Dior Haute Couture's design technic not only emphasizes the details of collars and up side of clothes or trimming but also persuits the total beauty of balanceness with the harmony of the evenness between other factors.

Solo-spun 방적에서 섬유의 거동과 사의 물리적 성질(1) (The Fiber Behavior in Yarn Formation and the Physical Properties of Solo-spun Yarn(1))

  • 박수현;김승진
    • 한국염색가공학회지
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    • 제13권5호
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    • pp.58-58
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    • 2001
  • This study surveys the fiber behavior in yarn formation and the physical properties of Solo-spun yarn. The specimens were made by six types of Solo-spun rollers with fixed twist multiplier. The physical properties such as yarn count, evenness, strength, and breaking elongation of these yarns were compared with the properties of ring spun yarns and analysed with the mechanism of Solo-spun yarn formation. The grooves on the surface of Solo-spun roller divide the web and interfere the twist propagation. These phenomena cause the uneven draft and the fly of fiber, so the Solo-spun yarn becomes finer than fing-spun yarn and the yarn breaking strength and elongation deteriorate, but these demerits can be improved with rounding the protruded edge of Solo-spun roller grooves.

Solo-spun 방적에서 섬유의 거동과 사의 물리적 성질(1) (The Fiber Behavior in Yarn Formation and the Physical Properties of Solo-spun Yam(1))

  • 박수현;김승진
    • 한국염색가공학회지
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    • 제13권5호
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    • pp.346-352
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    • 2001
  • This study surveys the fiber behavior in yam formation and the physical properties of Solo-spun yam. The specimens were made by six types of Solo-spun rollers with fixed twist multiplier. The physical properties such as yam count, evenness, strength, and breaking elongation of these yams were compared with the properties of ring spun yams and analysed with the mechanism of Solo-spun yarn formation. The grooves on the surface of Solo-spun roller divide the web and interfere the twist propagation. These phenomena cause the uneven draft and the fly of fiber, so the Solo-spun yam becomes finer than fing-spun yam and the yam breaking strength and elongation deteriorate, but these demerits can be improved with rounding the protruded edge of Solo-spun roller grooves.

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생사검사에 있어서 현행방법과 전자식 방법에 대한 비교분석 II. Uster Tester 3의 세리프렌 검사 정확도와 검사효율 (Comparison of the Electronic Methods of Raw Silk Testing and Grading with Those of the Current Methods II. The Effectiveness and Convenience of Raw Silk Inspection Process by Uster Tester III)

  • 최병희;김한수
    • 한국잠사곤충학회지
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    • 제34권1호
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    • pp.72-80
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    • 1992
  • These studies were brought about to know how much the elctronic methods of raw silk testing is correct, effective and convenient in the testing process. These effectiveness and convenience for the testing process under the emergency of the automatic system in raw silk inspecting process, the convenience of inspection in crease in it's capability decreasing the necessary working members, but as certain defect, the corresponding time span needs more than the former case in kind. Judging from the above mentioned carefully, it is necessary or even immidiate for participants to deeply study and search in earnest as well, before adopting the so called International Method of Raw Silk Test and Classification which was proposed by S.S.C in 1990.

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유전자지문분석법(T-RFLP)을 이용한 하천 미생물의 다양성 평가 (Evaluation of Riverine Microbial Diversity using the Culture-Independent Genetic Fingerprinting Technique (T-RFLP))

  • 정주용;이경희
    • 한국물환경학회지
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    • 제24권2호
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    • pp.195-200
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    • 2008
  • To analyze the riverine microbial community structure, genetic fingerprints and ecological indexes such as species abundances, diversity, evenness, dominance of targeted rivers in Gyeonggi Province were acquired and evaluated using terminal restriction fragment length polymorphism (T-RFLP) technique. Genetic fingerprinting technique such as T-RFLP, which is able to show the microbial community clearly unlike traditional culture-dependent techniques, was thought to be useful to analyse the riverine microbial ecosystem under various factors. Riverine ecosystem evaluation using visible organisms would give biased results with time, targeted organism and researcher. But, T-RFLP, which can exclude the subjected biases such as culture condition and identification, would be an option to understand natural ecosystem by including the microorganisms that defy culture but perform important functions.

Solo spun 방적에서 섬유의 거동과 사의 물리적 성질(2) (The Fiber Behavior in Solo-spun Yarn Formation and the Physical Properties of Solo-spun Yarn(2))

  • 박수현;김승진
    • 한국염색가공학회지
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    • 제13권6호
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    • pp.428-434
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    • 2001
  • This study surveys the fiber behavior in yam formation and the Physical properties of Solo-spun yarn. The specimens were made by six types of Solo-spun rollers with fixed twist multiplier In the previous part, the physical properties such as yarn count, evenness, strength, and breaking elongation of these yams were compared with the properties of ring shun yarns and analysed with the mechanism of Solo-spun yarn formation. In the second part of this report, the abrasion resistance and hairiness were discussed wish respect to the micro yarn structures. The narrower the groove width of Solo-spun roller is, the more active the bulk fibers migration is. The Solo-spun film structure has two groups. One is shorter than the others one in longitudinal direction of yarn and has the same structure as ring-spun yarn, which is derided from the smooth zone on the surface of Solo-spun roller. The other one is longer than the former and there are the wrapping fibers. This part is derived from the conflicted grooves on the surface of Solo-spun troller.

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Solo spun 방적에서 섬유의 거동과 사의 물리적 성질(2) (The Fiber Behavior in Solo-spun Yarn Formation and the Physical Properties of Solo-spun Yarn(2))

  • 박수현;김승진
    • 한국염색가공학회지
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    • 제13권6호
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    • pp.70-70
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    • 2001
  • This study surveys the fiber behavior in yarn formation and the Physical properties of Solo-spun yarn. The specimens were made by six types of Solo-spun rollers with fixed twist multiplier In the previous part, the physical properties such as yarn count, evenness, strength, and breaking elongation of these yarns were compared with the properties of ring spun yarns and analysed with the mechanism of Solo-spun yarn formation. In the second part of this report, the abrasion resistance and hairiness were discussed with respect to the micro yarn structures. The narrower the groove width of Solo-spun roller is, the more active the bulk fiber migration is. The Solo-spun yarn structure has two groups. One is shorter than the other one in longitudinal direction of yarn and has the same structure as ring-spun yarn, which is derived from the smooth zone on the surface of Solo-spun roller. The other one is longer than the former and there are the wrapping fibers. This part is derived from the conflicted grooves on the surface of Solo-spun roller.