• 한국잠사곤충학회지
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• 제25권2호
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• pp.32-36
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• 1984

하추기 뽕나무 총채벌레의 우수 방제 약제 선발과 총채벌레 피해뽕잎이 잠작에 미치는 영향 및 뽕잎 성분 변화를 구명키 위한 시험에서 얻어진 결과를 요약하면 다음과 같다. 1. 총채벌레 방제에 우수한 효과를 나타냄. 약제는 Ortran, Furadan, Metasystox이었으며, Ortran과 Furadan의 약효 지속기간은 25일로 제일 길었다. 2. 총채벌레 피해뽕잎과 방제뽕으로 누에를 사육한 결과 수견양 방제뽕잎구는 상자당 3.68kg (10a당 5.15kg)이 증수되었다. 3. 방제뽕잎중의 수분 및 전탄수화물의 함량은 피해뽕잎중의 그것보다 높았고, 피해뽕잎이 조기에 경화되는 경향을 보였다.

• 한국융합학회논문지
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• 제9권6호
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• pp.89-98
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• 2018

은행잎의 Biflavonoid인 ginkgetin과 isoginkgetin을 화장품 소재로 이용 가능성 여부를 확인하기 위해 이를 분리하여 화학 구조 및 물리화학적 특성을 규명하고자 하였다. 음건한 은행나무 단풍잎 1 kg을 순차적으로 ethanol, n-hexane, ethylacetate 및 normal butyl alcohol로 분획 추출하여 최종 ginkgetin과 isoginkgetin을 확보하였다. 두 화합물은 모두 HPLC를 통해 99% 이상 고 순도로 나타났고 MS spectrum을 통한 분자량은 566, 분자식은 $C_{32}H_{22}O_{10}$로 동일한 이성질체적 구조를 나타냈다. UV spectrum으로 flavonoid의 골격과 NMR로 aromatic proton의 존재와 탄소 수 및 구성비를 측정한 결과 문헌에 보고된 flavonoid 화합물의 정보와 일치하였다.

• 한국잠사곤충학회지
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• 제2권
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• pp.33-39
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• 1962

춘하추 삼기사육에 있어서 연구조사한 결과 본시험에서 다음과 같은 결과를 얻었다. 1. Menthol의 상기첨식시험에서 Menthol의 1%내에서는 잠아의 생리에 하등의 영향이 없다는 결과를 얻었다. 이 결과는 누에의 상기한 실용형질 전면에 걸쳐 무해이며 또 유익하다는 점도 발견치 못하였다. 2. 박하를 상전에 간작하여 지장이 없음이 연명되였으며 박하엽에 거찰된 상엽을 잠아에 결여하여도 누에 생리에 하등영향이 없다. 3. 들깨(荏)에 있어서도 2항과 동일하다. 4. 결과적으로 박하의 상전간작은 무해로운 작물로 사료되며 들깨의 상전간작도 농민들이 기피하는 경향이 있으나 잠아에는 하등영향이 없다.

• Preventive Nutrition and Food Science
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• 제4권2호
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• pp.97-102
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• 1999

Antimicrobial activity and chemical composition of volatile flavor extracts from Agastache rugosa were investigated. The volatile flavor extracts were obtained from leaves and stems of Agastache rugosa by simultaneous distillation extraction (SDE) method. Antimicrobial activity was investigated by disc diffusion and broth dilution methods against several microorganisms of Bacillus cereus, bacillus megaterium, Bacillus subtilis, Corynebacterium xerosis, Staphylo coccus aureus, Staphylococcus epidermidis, Agrobacterium rhizogenes , Agrobacterium tumefaciences, Enterobacter cloacae, Escherichia coli, Salmonella typhi, Vibrio parahaemolyticus, Candida utilis and Saccharomyces cerevisiae. Volatile flavor extractsfrom leaves have strong antimicrobial activity against C.utilis and S.cerevisiae. When 0.12% volatile flavor extracts from fresh leaves were included in the medium, lag phase of C. utilis was extended 6 hr and that of S.utilis and S.cerevisiae was extended 2hr. Further analyses were performed to elucidatethe effective component of the extracts. The major component of volatile flavor was estragole, a phenolic compound. Minor components were determined to be terpenes , alcohols, acids , esters, ketones and aldethydes.

• 한국연초학회지
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• 제17권1호
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• pp.68-78
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• 1995

A study of expanding tobacco includes the steps of adjusting the moisture content of cut tobacco, without the use of exogenous impregnants by contacting the filler with a high velocity gaseous medium at elevated temperature such that heat is rapidly and substantially uniformly transferred from the medium to the filler for a total contact time sufficient to expand the tobacco leaves. Study is disclosed for drying and expanding cut tobacco by introducing the tobacco into an elongated tubular shaped conduit through which steam high temperature 150-35$0^{\circ}C$ and high velocity above the 18m1sec, super steam is recycled. moisture content of shreded tobacco leaves, immediately before treatment within the range of from 10% to 24% and, most preferably, within the range of from 18% to 21%. Expanding rate showed 70% in NC -82(B.3) and 42% in Burley -21(B.1) which is produced in 1993 under this condition. When expanding tobacco expanded tobacco did not change significally, but they were decreased at 27$0^{\circ}C$ very largely. The curtailment of cost price and physical and chemical properties of various items were improved in cigarettes. Key words : Expanding tobacco, Super steam tobacco expansion, Fast drying tobacco, High temperature treat tobacco, Puffing tobacco.

• Structural Engineering and Mechanics
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• 제50권5호
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• pp.575-588
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• 2014

Gel materials have recently gained more attention due to its unique capability of large and reversible volumetric changes. This study explores the possibility of mimicking the pattern formation of certain natural fruits during their growing process and leaves during drying processes through the swelling and de-swelling of gel materials. This will hopefully provide certain technical explanations on the morphology of fruits and plants. We adopt the inhomogeneous field gel theory to predict the deformation configurations of gel structures to describe the morphology of natural fruits and plants. The growing processes of apple and capsicum are simulated by imposing appropriate boundary conditions and field loading via varying the chemical potential from their immature to mature stages. The drying processes of three types of leaves with different vein structures are also investigated. The simulations lead to promising results and demonstrate that pattern formation of fruits and plants may be described from mechanical perspective by the behavior of gel materials based on the inhomogeneous field theory.

• Journal of Microbiology and Biotechnology
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• 제29권5호
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• pp.731-738
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• 2019

Endophytic fungi are an important component of plant microbiota, and have the excellent capacity for producing a broad variety of bioactive metabolites. These bioactive metabolites not only affect the survival of the host plant, but also provide valuable lead compounds for novel drug discovery. In this study, forty-two endophytic filamentous fungi were isolated from Ficus elastica leaves, and further identified as seven individual taxa by ITS-rDNA sequencing. The antimicrobial activity of these endophytic fungi was evaluated against five pathogenic microorganisms. Two strains, Fes1711 (Penicillium funiculosum) and Fes1712 (Trichoderma harzianum), displayed broad-spectrum bioactivities. Our following study emphasizes the isolation, identification and bioactivity testing of chemical metabolites produced by T. harzianum Fes1712. Two new isocoumarin derivatives (1 and 2), together with three known compounds (3-5) were isolated, and their structures were elucidated using NMR and MS. Compounds 1 and 2 exhibited inhibitory activity against Escherichia coli. Our findings reveal that endophytic fungi from the rubber tree F. elastica leaves exhibit unique characteristics and are potential producers of novel natural bioactive products.

• Asian Journal of Business Environment
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• 제14권1호
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• pp.15-22
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• 2024

Purpose: The development of natural batik dyes based on a combination of coconut fiber waste and avocado leaves using the extraction method is important to support the green economy and reduce chemical waste in Indonesia. Research design, data and methodology: The research explores the use of coconut fiber and avocado leaf waste extraction as a natural batik dye and conducts market testing to assess consumer satisfaction. Results: Indonesian batik exports are growing, but synthetic dye practices are causing a decline in demand. To address this, natural dyes are being explored, including coconut fiber waste and avocado leaf waste. Conclusion: Test results from washing at 40 degrees Celsius in terms of color changes and color staining, from sweat in terms of changes in acid color and changes in base color, to sunlight in terms of color fastness value, to heat to iron in terms of color change and color staining shows a value of 3-4 (quite good) and 4-5 (good), meaning that coconut fiber and avocado leaves waste can be used as natural batik dye.

• Archives of Pharmacal Research
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• 제25권6호
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• pp.831-836
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• 2002

A new and two known lupane-triterpene glycosides were isolated from the hot MeOH fraction of the leaves of Acanthopanax gracilistylus W. W. Smith. Based on the physical properties and spectroscopic data, their chemical structures were determined as acankoreoside A (1), acankoreoside D (2), and $3{\alpha}-hydroxy-lup-23-al-20(29)-en-28-oic$ acid $28-O-{\alpha}-L-rhamnopyranosyl-(1{\rightarrow}4)-{$beta}-D-glucopyranosyl-(1{\rightarrow}6)-{\beta}-D-glucopyranosyl$ ester (3), respectively. To our best knowledge, compand 3 appears to be novel, which was named as wujiapioside A.

• 한국연초학회지
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• 제4권2호
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• pp.31-36
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• 1982

The field evaluation were conducted on dihaploid progenies derived from anther culture of F1 plant of Drama x Sohyang (N. tabacum L.) The mean values of agronomic and chemical traits of dihaploids such as Nicotine, length/width, plant height, Leaf length, leaves per plant and Yield were greater than those of tar parents. The correlation coefficient of dihaploids were similar to those of conventional lines and varieties. In path analysis, in relating yield components to yield, leaves per plant and leaf width had a direct effect on Yield, but the other components such as plant height, leaf length and days to flowering influenced Yield indirect way.