• 한국초지조사료학회지
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• 제6권1호
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• pp.44-48
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• 1986

사일리지 옥수수의 적정(滴定) 질소시비(窒素施肥) 수준(水準)과 재식밀도(栽植密度)를 알아보고자 1981년(年) 부터 1982년(年) 까지 축산시험장(畜産試驗場) 사료포(飼料圃)에서 단교잡종(單交雜種) 수원(水原) 19호(號)를 가지고 시험(試驗)한 결과(結果)는 아래와 같다. 1. 질소(窒素)를 증시(增施)하면 웅수출현기(雄穗出現期)와 간장(稈長)은 뚜렷한 변화가 없었으나 착수고(着穗高)는 다소 낮아지고 경(莖)의 직경(直徑)은 굵어지며 엽면적지수(葉面積指數)와 도복율(倒伏率)은 높아졌다. 2. 밀식(密植)하면 웅수출현기(雄穗出現期)는 늦어지고 간장(稈長)은 짧아지나 착수고(着穗高)는 높아지며 경(莖)의 직경(直徑)은 가늘어지고 엽면적지수(葉面積指數)와 도복율(倒伏率)은 증가(增加)되었다. 3. 질소(窒素)를 증시(增施)하면 결주율(缺株率)이 높아지고 밀식(密植)하면 불임율(不姙率)이 높아져 종실수량(種實收量)은 10a당(當) 질소(窒素) 10kg, 재식본수(栽植本數) 5,550본(本)에서 많았다. 4. 전가소화(全可消化) 건물수량(乾物收量) 역시 10a당 질소(窒素) 10kg, 재식본수(栽植本數) 5,550 본(本)에서 많았다.

• 한국자원식물학회지
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• 제19권3호
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• pp.427-431
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• 2006

In vitro high-frequency plant regeneration of Muscari comosum var. plumosum through somatic embryogenesis was obtained via two developmental pathways: direct embryos and multiple shoots regenerated from embryogenic callus. Flower bud with pedicel, receptacle, petal and ovary wall, floral stalk and leaf as explants were cultured in MS medium supplemented with various plant growth regulators. Embryos formed directly from pedicel, receptacle and floral stalk. Depending on explant sources, the optimal medium was MS medium supplemented with 0.2 mg/L IBA and 0.3 mg/L BA, 3.0 mg/L IBA and 3.0 mg/L BA, and MS-free medium for pedicel, receptacle, and floral stalk, respectively. Multiple shoots regenerated from embryogenic cal]i which was initiated from petal, ovary and leaf were observed in MS medium with different concentrations and combinations of hormone. The most suitable medium for each type of explant was 3.0 mg/L IBA and 3.0 mg/L BA(petal and ovary) and 5.0 mg/L IBA and 5.0 mg/L BA (leaf) Furthermore, the combination of 0.1 mg/L 2,4-D and 1.0 mg/L BA was also good for all sources of explants not only for direct embryo formation, but also, for embryogenic callus induction.

• 한국미생물·생명공학회지
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• 제42권1호
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• pp.58-66
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• 2014

본 연구에서는 브로콜리의 비가식 부위의 효율적인 이용 및 브로콜리의 가공식품 개발 연구의 일환으로 브로콜리의 주요 가식부위인 꽃송이와 비가식 부위인 줄기 부분을 대상으로 각각 에탄올 추출물 및 이들의 순차적 유기용매 분획물을 조제하여 이들의 유용성분 분석 및 항산화, 항균, 대장암 세포 생육억제능을 평가하였다. 먼저 성분 분석결과 브로콜리 줄기는 꽃송이보다 수용성 당류를 많이 포함하고 있으며, 꽃송이는 상대적으로 지용성 물질을 많이 포함하고 있었고, 총 플라보노이드 및 총 폴리페놀은 꽃송이가 줄기보다 1.50-1.99배 높은 함량을 나타내었다. 분획물의 총 플라보노이드 함량은 줄기 및 꽃송이의 ethylacetate 분획이 9.45 mg/g 및 42.01 mg/g으로 가장 높게 나타났으며, 총 폴리페놀 함량도 꽃송이 ethylacetate 분획이 181.12 mg/g으로 가장 높게 나타났다. 항산화 활성 평가결과, 브로콜리 꽃송이 에탄올 추출물의 ethylacetate 분획에서 강력한 DPPH 음이온 소거능, ABTS 양이온 소거능 및 환원력을 확인하였으며, nitrite 소거능의 경우에는 줄기의 n-hexane 분획이 강력한 활성을 나타내었다. 항균 활성 평가에서는, 꽃송이의 ethylacetate 분획에서 실험에 사용된 그람 양성 및 그람 음성 세균 모두에서 강력한 항균력을 나타내었다. 대장암 세포성장 억제활성 평가에서는, 줄기 및 꽃송이에서 모두 n-hexane 분획 및 ethylacetate 분획에서 우수한 생육억제 활성을 나타내었으며, 줄기의 경우 n-hexane 분획에서 세포 생존율 $18.4{\pm}1.2%$, 꽃송이에서는 n-butanol 분획에서 세포 생존율 $6.9{\pm}2.3%$를 나타내어 가장 강력한 활성이 나타났다. 본 연구결과는 브로콜리의 다양한 부위로부터 관련 활성물질의 탐색, 정제를 통한 식의약품 소재 개발 연구가 가능함을 제시하고 있다.

• 한국연초학회지
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• 제4권2호
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• pp.41-50
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• 1982

To investigate tile effects of growth characteristics on the yield, price per Kg, chemical contents and physical properties in Burley tobacco, ten varieties including Burley 21 were tested in this study. The results obtained are summarized as follows. 1 Forty to fifty days after transplanting, CCR (Crop Growth Rate) was the highest. RCR (Relative Growth Rate) increased up to 40 days, but decreased 50 days when maturation began. High- yielding varieties showed high CCR and RCR till 60 days. 2. Total alkaloid content of cured leaf increased about three times than that of topping stage, but the increased rates were some what different among varieties. 3. Leaf area, stalk diameter, stalk height and days to flower showed positive correlations to yield, whereas leaf thickness and weight per unit leaf area showed negative. 4 Varieties which are high in cured leaf weight ratio and weight per unit leaf thickeners showed relatively poor quality. 5 Nitrogen content was high in leafy and larger stalk diameter variety. 6. There are positive correlation between weight per unit leaf thickness and filling power. The time of combustion was positively correlated to leaf thickness and weight Per unit leaf. 7. It can be concluded that many characteristics are related to the yield, but not quality. It is, there fore, easy to Predict tile yield, but difficult to forecast the qualiffy.

• 한국연초학회지
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• 제18권1호
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• pp.5-11
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• 1996

Field experiment was conducted to get the basic information about the difference in color and plastid pigments at the different stage of harvest of flue-cured tobacco cultivated in paddy field, and compared to upland ones. All tested crops were primed in lots of 3 to 4 at each priming, beginning at the bottom of the plant. Leaf pigments and chromatic values of tobacco leaves were determined in samples collected at weekly intervals, and according to analyses obtained from 4 stalk positions. By the degree of maturity, leaves harvested were separated with visual characters into four classes of immature, mature, ripe and mellow. regardless of stalk position, chlorophyll contents was higher in the order of immature > mature > ripe > mellow, respectively. In fresh leaves, chlorophyll levels was higher with ascending stalk position. chlorophyll a and b in cured leaves were less than 10% of the amount present at harvest, and it was estimated that maturity condition also influenced the rates of degradation of plastid pigments. Fully mature leaves of upland diverted from paddy field showed slightly higher in chlorophyll contents than in those of upland tobacco ones but somewhat lowered in $L^*$ and $b^*$ values, and there was no difference in $a^*$ value.

• 한국자동차공학회논문집
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• 제21권3호
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• pp.30-42
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• 2013

This study investigates the effects of OSRVM mounting location and its configurations such as stalk height and housing height on the aerodynamic performance of the passenger car. In order to validate the flow solver, FLUENT which is very well known commercial code, the flow field around an Ahmed Body was analyzed numerically and compared with the experimental data. The predicted aerodynamic performance and flow patterns around a car show good agreements with the experimental data. Mounting location and stalk height should be designed while OSRVM is mounted on the car to evaluate the aerodynamic performance precisely. Housing height, however, may be designed independent of the car because the aerodynamic interference between housing height and car configuration is negligible.

• 펄프종이기술
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• 제42권2호
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• pp.61-66
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• 2010

Corn stalk, one of the most abundant agricultural residue in the world, was examined in this study to use it as an alternative fiber source of wood fiber. In order to find the proper way to utilize corn stalk more efficiently, the morphological properties and the papermaking properties of the, bast fibers and the corn pith, were evaluated respectively. Although the bast fiber fraction showed comparable properties to those for hardwoods in the fiber properties and the papermaking properties, the pith resulted in low brightness and low drainage rate. But the short and flexible fibers in pith fraction led to dense and compact handsheet structure, correspondingly the higher sheet strength. There big differences in properties between bast fiber and pith should be considered for the fully utilization of corn stalk.

• Applied Microscopy
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• 제43권2호
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• pp.47-53
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• 2013

The trichomes on leaves of three species of Mentha such as M. spicata, M. suaveolens, and M. piperita var were examined by scanning electron microscopy. Simple non-glandular trichomes and peltate glandular trichomes were distinctively occurred on these leaves. In M. spicata, short and sharp non-glandular trichomes were dominantly appeared on adaxial surface, whereas capitate glandular trichomes were commonly localized on abaxial surface. In M. suaveolens, non-glandular trichomes were identified with simple unbranched and branched. Unbranched trichomes which were sharp and pointed in shape occurred on adaxial surface, however, branched and v-shaped trichomes appeared abundantly on abaxial surface. Peltate trichomes consisted of a large eight-celled head. Small capitates trichomes consisted of a cylindrical head with an one-celled uniseriate stalk. In M. piperita var, single non-glandular trichomes and peltate trichomes were present on adaxial surface. Small capitate trichomes consisted of a globose unicellular head with a two- or three-celled uniseriate stalk. Peltate trichomes were distinctly present on abaxial surface, whereas they were not observed on adaxial surface. The trichomes were less dense in this species. Peltate trichomes consisted of a large eight-celled head, with an enlarged secretory cavity, attached to an one-celled short stalk.

• Asian-Australasian Journal of Animal Sciences
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• 제15권2호
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• pp.205-208
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• 2002

The use of chopped sugarcane stalk (CSS) as a roughage for lactating cows was examined using four Holstein crossbred cows in a private dairy farm in Khon Kaen, Thailand, in comparison with rice straw (RS), which is the conventional roughage in the dry season in the region. Cows were subjected to the following two dietary treatments: Diet 1) RS with commercial concentrate feed, and Diet 2) CSS and RS with commercial concentrate feed. The diet was switched over every 3 weeks. The amount of concentrate was determined by the experience of the owner of the cows. RS and CSS were given ad libitum. There was no difference in milk production between two groups, although the total DMI was less in cows fed CSS. Solid-not-fat (SNF) content in milk was significantly higher in the cows given CSS. The NEFA content was significantly lower in the animals given CSS, which suggested that cows given only RS as roughage would be suffering from energy malnutrition. Therefore, it was considered that CSS feeding improved energy supply, which resulted in higher SNF in milk. In the nutritional point of view, the present study clearly showed CSS can be used as a roughage for dairy cows in the dry season.

• 대한본초학회지
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• 제25권1호
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• pp.45-54
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• 2010

Objectives : The purpose of this study is to determine the impurity tolerance of Zanthoxylum Peel. Methods : Compare with medicinal Herb Books and the Pharmacopoeia of 6 nations. Results : Current Pharmacopoeia show different Zanthoxylum Peel's Purity, such as 2.0% of seeds and fruit stalk, etc. in North Korea, 2% of seeds in Vietnam, totally 3% in China. On the other hand, Korea and Japan set the total number 26.0% including the specific numbers such as 20.0% of seeds, 5.0% of fruit stalk, 1.0% of the other foreign matter. This Zanthoxylum Peel's Purity, 26.0%, is too high compared to that of other medical matters specified by The Korean Pharmacopoeia Ninth Edition. When The Japanese Pharmacopoeia Sixth Edition firstly set the Zanthoxylum Peel's Purity, the herbal name was Fructus. However, since the part for medical usage in origin is well-ripen pericarp, not seed, the permissible level, 30.0%, is supposed to be simple error range, 3.0%. Conclusions : As a result, I think bills concerning the Zanthoxylum Peel's Purity should be revised to the total number 3.0% or specifically set the level 2.0% of seeds, 1.0% of fruit stalk, twig and so on.