• 한국연초학회지
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• 제25권2호
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• pp.87-94
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• 2003

Recently, many researches for plant alkaloids, one of the largest groups of natural products, are reported because of their various pharmacological activity. This study was carried out to clone putrescine N-methyltransferase (PMT) gene which is a key enzyme in diverting polyamine metabolism towards the biosynthesis of nicotine and related alkaloids from Burley tobacco. To induce expression of PMT gene in tobacco plant, the floral meristem was removed and then mRNA was purified from root. cDNA encoding PMT gene was isolated by RT PCR and cloned. Three different groups of clones were screened by PCR and restriction enzyme digestion analysis and were characterized. The data of these screening revealed that three types of PMT are present in Burley tobacco. Comparison of the nucleotide sequence of this three genes encoding putative PMT with those of other tobaccos revealed that two types of PMT are newly discovered from Nicotiana tabacum cv. Br21 tobacco and they were same as PMT2, PMT3 of N. tabacum cv. Xanthi.

• Bulletin of the Korean Chemical Society
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• 제34권4호
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• pp.1263-1265
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• 2013

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제14권4호
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• pp.322-331
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• 2014

Chaotic dynamics is an active area of research in biology, physics, sociology, psychology, physiology, and engineering. This interest in chaos is also expanding to the social scientific fields such as politics, economics, and argument of prediction of societal events. In this paper, we propose a dynamic model for addiction of tobacco. A proposed dynamical model originates from the dynamics of tobacco use, recovery, and relapse. In order to make an addiction model of tobacco, we try to modify and rescale the existing tobacco and Lorenz models. Using these models, we can derive a new tobacco addiction model. Finally, we obtain periodic motion, quasi-periodic motion, quasi-chaotic motion, and chaotic motion from the addiction model of tobacco that we established. We say that periodic motion and quasi-periodic motion are related to the pre-addiction or recovery stage, respectively. Quasi-chaotic and chaotic motion are related to the addiction stage and relapse stage, respectively.

• Journal of Information Processing Systems
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• 제18권3호
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• pp.311-318
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• 2022

Tobacco sales enterprises often need to summarize and verify the daily sales bills, which may consume substantial manpower, and manual verification is prone to occasional errors. The use of artificial intelligence technology to realize the automatic identification and verification of such bills offers important practical significance. This study presents a novel multi-branch residual network for tobacco sales bills to improve the efficiency and accuracy of tobacco sales. First, geometric correction and edge alignment were performed on the input sales bill image. Second, the multi-branch residual network recognition model is established and trained using the preprocessed data. The comparative experimental results demonstrated that the correct recognition rate of the proposed method reached 98.84% on the China Tobacco Bill Image dataset, which is superior to that of most existing recognition methods.

• 한국연초학회지
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• 제4권1호
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• pp.79-81
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• 1982

Cytoplasmic male- sterile Hyangchio, derived from male- sterile Burley 21 containing N. megalosiphon cycloplasm, and male- fertile Hyangchio (Korean local aromatic variety) were evaluated in replicated pot trials in green-house. Male- sterile Hyangchio was comparable to the male- fertile Hyangchio for six agronomic traits and total alkaloids content. The only significant difference was that the male- sterile Hyangchio flowered 2.3 days later than the male- fertile Hyangchio. M ale- sterile Hyangchio has increased the yield than the male- fertile Hyangchio significantly in case of non- topped.

• 농촌의학ㆍ지역보건
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• 제26권2호
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• pp.7-14
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• 2001

증례들은 40대 남자 1명과 여자 1명, 50대 여자 2명이었다. 담배 농사는 모두 10년 이상 종사하였다. 모두 어지러움과 구역을 호소하였으며, 구토, 두통, 설사, 쇠약감 등의 증상이 있었다. 이런 증상은 담배를 집중적으로 수확하는 시기에 발생하였으며, 날씨가 덥거나 땀을 많이 흘리는 경우에 증상이 심했다. 이슬에 젖은 담배잎을 수학하면서 증상이 발현되는 경우도 있었다. 최근 2-3년 동안에 상기 증상들이 1년에 2-3차례 발생하였다. 남자 1명이 고혈압으로 치료하고 있는 것을 제외하면 병력상 특이점은 없었으며, 모두 비흡연자였다. 증례들은 약국과 병원에서 수액요법 등으로 1일 이내에 호전되었다. 우리 나라에서 담배잎농부병의 유병률, 발생률 및 위험요인을 파악하기 위한 역학조사와 병 의원 감시체계를 가동하여야 한다. 담배잎을 수확하다가 어지러움과 구토를 주소로 내원하는 많은 사람들이 실제 담배잎농부병으로 진단되지 못하고 단순한 농약중독과 고온손상에 준하여 치료받는 경우가 많을 것으로 생각한다. 담배를 재배하는 농부는 물론 의료인에 대해서도 담배잎농부병의 예방과 치료에 대한 교육을 실시하여야 한다.

• Asian Pacific Journal of Cancer Prevention
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• 제17권1호
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• pp.275-280
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• 2016

Background: A tobacco-free workplace policy is identified as an effective means to reduce tobacco use and protect people from second-hand smoke; however, the number of tobacco-free policies (TFP) remains very low in workplaces in Malaysia. This study explored the factors affecting support for a tobacco-free policy on two healthcare campuses in Malaysia, prior to the implementation of TFP. Materials and Methods: This cross-sectional study was conducted among 286 non-smokers from two healthcare training centres and two nearby colleges in Malaysia from January 2015 to April 2015. A standardized questionnaire was administered via staff and student emails. The questionnaire collected information on sociodemographic characteristics, support for a tobacco-free policy and perceived respiratory and sensory symptoms due to tobacco exposure. Bivariate and multivariate logistic regression analyses were performed to estimate the independent effects of supporting a tobacco-free campus. Results: The percentage of individuals supporting completely tobacco-free facilities was 83.2% (N=238), as opposed to 16.7% (N=48) in support of partially tobacco-free facilities. Compared to the supporters of partially tobacco-free facilities, non-smokers who supported completely tobacco-free health facilities were more likely to be female, have higher education levels, to be very concerned about the effects of other people smoking on their health and to perceive a tobacco-free policy as very important. In addition, they perceived that tobacco smoke bothered them at work by causing headaches and coughs and, in the past 4 weeks, had experienced difficulty breathing. In the multivariate model, after adjusting for sociodemographic characteristics and other factors, only experiencing coughs and headaches increased the odds of supporting a completely tobacco-free campus, up to 2.5- and 1.9-fold, respectively. Conclusions: Coughs and headaches due to other people smoking at work enhances support for a completely tobacco-free campus among non-smokers.

• 한국연초학회지
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• 제2권1호
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• pp.83-84
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• 1980

• 한국연초학회:학술대회논문집
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• 한국연초학회 2001년도 46회 학술발표회
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• pp.11-12
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• 2001

• 한국연초학회지
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• 제27권1호
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• pp.134-140
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• 2005

The purpose of this study was the discrimination of different tobacco types by the E-Nose/tongue and the analysis of what human sensory attributes are correlated with e-instrument's sensors. Samples were made from five groups of Korean domestic tobacco leaves, aged burley and not aged, aged flue-cured and not aged and blending types of the four. Instrumental tests were conducted to discriminate characteristics among different tobacco samples by the E-Nose and the E-Tongue. Sensory attributes of tobacco tastes were impact, irritation, bitterness, hay-like, tobacco taste, smoke volume, smoke pungent and mouth cleanness. STATISTICA software was used to analyze correlation between the human sensory data and the raw data of e-instruments. Discrimination analysis can be achieved using principal components analysis (PCA) and discriminant factorial analysis(DFA). As a result, impact, bitterness, irritation, smoke volume and smoke pungent of human sensory attributes were correlated with data from the several clustered E-Nose sensors(p < 0.10). And bitterness, irritation, and smoke pungent of human sensory attributes were correlated with data from the E-Tongue sensors(p < 0.10). PCA plot by the E-Nose shows that aged tobacco and not aged were discriminated and DFA plot shows that three groups(aged burley, not aged burley and flue-cured) were discriminated. PCA plot by the E- Tongue shows that flue-cured tobacco was separated from burley. Our results indicated that the e-instruments are sensitive enough to distinguish among tobacco types and their several sensors are reacted to the human sensory attributes.