• ALGAE
• /
• 제30권1호
• /
• pp.15-33
• /
• 2015

When the generitype Centroceras clavulatum, a presumed cosmopolitan warm temperate to tropical red alga, was discovered to have a biogeographic distribution limited to the Pacific Ocean using molecular and morphological evidence, the taxonomy in the genus Centroceras was thrown into chaos worldwide. An analysis of what species was, or were, previously identified as C. clavulatum in Bermuda is the focus of the present molecular (COI-5P, rbcL) and morphological study. Two novel species are proposed, C. arcii sp. nov. and C. illaqueans sp. nov., and the distributions of three taxa recently segregated in the 'C. clavulatum complex' of the western Atlantic, C. gasparrinii, C. hyalacanthum, and C. micracanthum, have been expanded to include Bermuda. C. arcii is shown to be morphologically cryptic with C. micracanthum, and remains best distinguished by its COI-5P barcode sequence.

• The Plant Pathology Journal
• /
• 제19권3호
• /
• pp.133-137
• /
• 2003

Seedborne fungus Bipolaris spicifera, which has not been previously reported in Korea, was detected from import-ed grass seeds in the country. The most frequently detected fungi from the seeds were Fusarium species, Ulocladium atrum, B. spicifera, Alternaria, and Cuvularia lunata among 17 different seed samples of the family Gramineae. Detection frequencies of B. spicifera were 11,8,5% in Bermuda grass, tall fescue, and mixed lawn grass imported from USA, respectively, and 9％ in mixed lawn grass imported from Italy. This suggests that important seedborne pathogen could be spread between countries through seed sources. The pathogen was seed-transmitted causing damping-off of Bermuda grass seedlings and showed strong pathogenicity to vice, corn, Bermuda grass, sorghum, and tall fescue. However, it did not infect wheat and blue grass.

• Asian-Australasian Journal of Animal Sciences
• /
• 제22권2호
• /
• pp.206-215
• /
• 2009

This experiment was carried out to evaluate performance and carcass characteristics of 40 crossbred young bulls ($Zebu{\times}European$) finished in a feedlot under two roughage sources (Bermuda grass hay or sorghum silage) with or without the addition of yeast (Saccharomyces cerevisae). The bulls were 20 months old, their initial average weight was 356 kg and they were allocated into four groups of ten animals. The experimental diets were Bermuda grass, Bermuda grass+yeast, sorghum silage and sorghum silage +yeast. Animal performance and carcass characteristics were not influenced by roughage source or yeast addition. The average daily weight gain was 1.50 kg, dry matter intake (DMI) was 11.1 kg/d, DMI as percentage of liveweight was 2.60% and feed dry matter conversion was 7.70. The mean dressing percentage was 52.0% and hot carcass weight was 268 kg. Carcass conformation was classified between good-minus to good. Carcass length (137 cm), leg length (72.9 cm) and cushion thickness (26.6 cm) were not influenced by treatments. The average fat thickness was 3.80 mm and the Longissimus muscle area was 66.9 $cm^{2}$. The classification of color, texture and marbling were slightly dark red to red, fine and slight-minus to light-typical, respectively. The mean percentage of bone, muscle and fat in the carcass was 15.5%, 62.3% and 22.5%, respectively. Yeast addition increased ${\gamma}$-linolenic fatty acid (0.15 vs. 0.11%) deposition. Bermuda grass hay increased deposition of ${\alpha}$-linolenic (0.49 vs. 0.41%), arachidonic (2.30 vs. 1.57%), eicosapentaenoic (0.41 vs. 0.29%), docosapentaenoic (0.80 vs. 0.62%), docosahexaenoic (0.11 vs. 0.06%) and n-3 fatty acids, and reduced n-6: n-3 ratio in meat, when compared to sorghum silage treatments. The treatments had no effect on saturated fatty acids (49.5%), polyunsaturated fatty acids (11.8%), n-6 fatty acids (9.87%), n-3 (1.61%) and PUFA:SFA ratio (0.24). Monounsaturated fatty acid levels were higher on sorghum silage (40.7 vs. 37.7%). The addition of yeast caused higher n-6: n-3 ratio (7.28 vs. 5.70) than treatments without yeast.

• 분석과학
• /
• 제9권1호
• /
• pp.107-111
• /
• 1996

Bipolaris cynodontis의 배양 추출물로부터 이탈리안 라이그라스 뿌리의 생육저해 활성을 나타내는 물질을 분리 정제한 다음에 2차원 NMR을 포함한 각종 기기분석을 이용하여 구조를 결정하였다. 이 화합물의 분자식은 $C_{24}H_{30}O_5$ 이었으며 세스퀴테르펜류 화합물로 이탈리안 라이그라스 및 벼와 같은 벼과식물에 대해서 100ppm에서 100%의 활성을 나타내는 것으로 보아 병원균의 병징 발현에 관여하는 것으로 보여진다.

• ALGAE
• /
• 제27권2호
• /
• pp.95-108
• /
• 2012

Using genetic sequencing (COI-5P, LSU, $rbc$L) to elucidate their phylogenetic positions and then morphological characters to distinguish each from existing species, three procumbent species, including two novel species, from warm temperate Northern Hemisphere waters are added to the recently resurrected genus $Halopeltis$ J. Agardh: $H.$ $adnata$ (Okamura) comb. nov. from Korea, $H.$ $pellucida$ sp. nov. from Bermuda and $H.$ $willisii$ sp. nov. from North Carolina, USA. Prior to these reports, the genus was confined to the Southern Hemisphere and tropical equatorial waters of the Northern Hemisphere although the latter records lack molecular confirmation. These three additional species join the six known species presently residing in $Halopeltis$.

• Bulletin of the Korean Chemical Society
• /
• 제28권4호
• /
• pp.613-618
• /
• 2007

Pollens are known to be an allergen. They penetrate human respiratory system, triggering a type of seasonal allergic rhinitis called pollen allergy (hey fever). The purpose of this study is to test two field-flow fractionation (FFF) techniques, gravitational FFF (GrFFF) and sedimentation FFF (SdFFF), for their applicability to sizecharacterization of micron-sized pollens. Both GrFFF and SdFFF are elution techniques, providing sequential elution of particles based on size. They allow the size distribution as well as the mean size of the sample to be determined from the elution time. In this study, GrFFF and SdFFF were used to determine the size distribution of Paper Mulberry and Bermuda Grass pollens. For the Paper Mulberry pollen, the mean size obtained by GrFFF is 12.7 μm, and agrees rather well with the OM data with the relative error of 8.0%. For the Bermuda Grass pollen, the mean size obtained by GrFFF is 32.6 μm with the relative error of 12.3%. The mean sizes determined by SdFFF are 12.4 (relative error = 10.1%) and 27.1 μm (relative error = 5.2%) for the Paper Mulberry and the Bermuda Grass pollen, respectively. Although SdFFF tends to yield more accurate size distribution due to lower band broadening under the field strength higher than 1 G, the sizes determined by GrFFF were not significantly different from those by SdFFF.

• Asian-Australasian Journal of Animal Sciences
• /
• 제17권1호
• /
• pp.53-62
• /
• 2004

The aim of this study was to predict the energy value and dynamic degradation of roughage in Taiwan using the $Daisy^{(R)}$. in vitro fermentation method to provide information on one of the very important nutrients for ration formulation. The second objective was to study the effects of Aspergillus oryzae (AFE) inclusion on nutrient utilization. Three ruminal fistulated dry dairy cows were used for rumen fluid and fifteen conventional forages used in dairy cattle were collected around this island. The degradability of these feedstuffs with and without AFE ($Amaferm^{(R)}$.) treatment was measured using the $Daisy^{(R)}$. in vitro method. The roughage energy values, including TDN and NEL, were calculated according to Robinson (2000). Results from the 30 h in vitro neutral detergent fiber (NDF) degradability and predicted energy evaluations showed that alfalfa (among the forages) contained the highest degradability and energy values, Bermuda straw having the lowest. Peanut vines and corn silage contained higher energy values and the lowest value found in Pangola and Napier grasses among the locally produced forages. Pangola and Napier grasses had lower values than most imported forages except Bermuda straw. Among the by-products, wheat middling contained the highest NDF degradability, while rice bran contained the richest energy value due to its high oil content. From the dynamic dry matter (DM), organic matter (OM), acid detergent fiber (ADF) and neutral detergent fiber (NDF) degradation, corn silage contained the highest effective degradation among the local forages; wheat middling (among the by-products) degraded the fastest in DM, OM, ADF and NDF and showed the highest effective degradability. AFE inclusion was inconsistent among the forages. Alfalfa hay showed significantly increased 30 h NDF degradability and energy values, Pangola hay, Napier grass and brewer's grains showed decreased degradability and energy values. AFE inclusion increased the DM, OM and NDF degradation rate in most forage, but only increased the DM degradation rate in sorghum distiller's grains, the OM degradation rate in bean curd pomace and the NDF and ADF degradation rates in soy pomace (among the by-products).

• 항공우주정책ㆍ법학회지
• /
• 제21권1호
• /
• pp.135-167
• /
• 2006

유럽연합의 통합과정에서 대두되는 EU와 제3국과의 항공교섭 상에서 기존의 EU회원국가들이 체결하고 있는 제3국과의 양국간 항공협정의 처리에 관한 문제가 대두하고 있다. 2004년 4월 29일의 유럽재판소의 판결기준에 대한 국제항공 공법적 차원에서 기존의 국제항공질서의 변화를 모색할 필요성이 강력하게 등장하게 된다. 이러한 점에서 특히 미국과의 기존의 양자관계를 다자관계로 변경하여야 하는 문제가 중요하다. 한국과도 향후 협상에 중요한 참고사항이 될 것이다. 이러한 점에서 특히 유럽연합과 미국의 기존의 양자관계에서 다자간 관계로 변형시켜 나가는 문제가 향후 국제항공질서에 커다란 영향을 미칠 것으로 보인다. 이러한 관점에서 새로운 방향전환을 위한 국제항공질서를 재정립할 대안모색을 해 본다. 결론적으로 대안모색으로서는 첫째, 기존의 시카고 협약에서 설정된 하늘에 대한 자유에 추가적인 질서형성을 위해 양국간 협정의 표본인 Bermuda I, II에 대체할 수 있는 어떤 다자간 제3의 Bermuda III와 같은 국제항공질서를 설정해야 한다. 둘째, 새로운 다자간 협정에 적용되어야 할 하늘의 자유는 양측의 자유만을 최대한 보장하는 형태가 아닌 양측의 주장을 조절하는 구체적인 것이 되어야 한다. 셋째, 또한 새로운 다자간 국제항공질서는 단순한 지역적 경계를 넘어서 전 지구적 문제로 접근한다는 점에서 최근 사회과학 연구에서 등장하는 복잡계이론을 도입할 필요가 있다. 이와 같은 대안모색에서 필요한 사항들을 점검하고 입장차를 줄여 나가는 방향으로 정리되어야 할 것으로 본다.

• 한국대기환경학회지
• /
• 제8권4호
• /
• pp.257-261
• /
• 1992

Measurements of sulfur dioxide, ozone and meteorological parameters at Kosan, Cheju Island show clear indications of the influence of the source areas of both Korean Peninsular and Mainland China. Monthly mean levels in February of $SO_2$ and $O_3$ were 1.4 and 44 ppb, respectively. These Values are 2-30 times higher than those measured in remote are as such as Bermuda Island and Uto Island in Finland. Ozone loss in February and March were found to be 0.2 and 0.36 ppb/hr and correlation coefficient between ozone and solar radiation was 0.48. Also it was found that $SO_2$ levels were more than 2 times higher when the prevailing winds from WSW-NNE than from the rest.

• Asian-Australasian Journal of Animal Sciences
• /
• 제5권2호
• /
• pp.279-283
• /
• 1992

Eighteen wether lambs averaging 32 kg were used to determine the effects of dietary silica, added as silicic acid, on mineral metabolism. Lambs were fed 1200 g daily of a coastal Bermuda grass based diet supplemented with either 0, .5 or 1.5% silicic acid. A 7-d total collection of urine and feces was conducted after lambs had adjusted to the dietary treatments for 19 days. Urinary excretion of silica was higher (p<.01) in lambs fed added silicic acid. Ruminal soluble concentrations of manganese tended to be lower (p<.10) and apparent absorption and retention of manganese were lower (p<.05) in lambs supplemented with silicic acid compared to control lambs. Apparent absorption and retention of calcium were slightly lower (p<.10) in silicic acid fed lambs. No differences in urinary between lambs fed .5 and those given 1.5% silicic acid. Phosphorus, magnesium, iron, zinc and copper absorption and retention were not affected by treatment.