• Title/Summary/Keyword: tobacco quality

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Problems and Prospects of Tobacco Quality Evaluation (잎담배 품질평가방법의 문제점 및 전망)

  • Lee, Seung-Chul;Ryu, Myung-Hyun;Han, Chul-Soo;Ban, Yu-Son
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.33 no.s01
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    • pp.124-138
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    • 1988
  • This paper comprised a review of published literature dealing with the evaluation of tobacco quality and usability. Evaluation of tobacco quality and usability seems to be difficult not only due to our inability to define them in simple and easily measurable term but also due to their relations to the profitability of tobacco companies and safety of comsumers. Chemical constituents and smoking taste and aroma of the tobacco represent the underlying basis for tobacco quality: however, tobacco is still purchased upon its physical appearance. Grade and value system is very convenient for evaluating the tobacco quality, if the system is based on the triangular relationship of physical appearance, chemical and smoking properties of tobacco, and also based on intrinsic quality of the tobacco independent of external influences. Grade and value system for tobacco in Korea is thought to be influenced by external factors besides intrinsic quality. Therefore, we have to concern new systems that could be supplement to, or replacement for currently available grade and value system.

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Study of Leaf Quality Coefficient on Korea Flue-cured Tobacco Leaves According to Chemical Variables. (이화학적인 방법에 의한 황색종 잎담배 품질의 계수)

  • 김신일;김찬호
    • Journal of the Korean Society of Tobacco Science
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    • v.6 no.1
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    • pp.63-72
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    • 1984
  • 1 . Some components associated with mildness, taste, and aroma were set. It was supposed that the three factors contribute to equally the evaluation of tobacco quality. Following equation of quality index was provide. $Q_{pr}\;=\;=0.815\;f_1+8.224f_2+1.858f_3$ where $f_1$ = Reducing sugar (%)/cellulose (%) $f_2=\frac{1}{Total N (%) + Protein (%) + Citric acid (%)}$ $f_3$=Key aromatic compounds ($mg/10g$) 2. The coefficient of correlation between the grades by visible criteria and the values of the quality index for Korean flue-cured tobacco was $\tau$=-0.689 (n=29)

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Effect of Stem Drying Method during Curing Process on Physico-chemical Properties in Bulk Cured Leaves (Bulk건조에서 주맥건조방법이 잎담배 이화학성에 미치는 영향)

  • 이철환;이병철;진정의
    • Journal of the Korean Society of Tobacco Science
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    • v.22 no.2
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    • pp.133-137
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    • 2000
  • The bulk curing experiment to improve the quality of flue-cured leaves were carried out to evaluate relationship between the modified(3 step-up) drying and conventional drying method in bulk curing process. Modified drying method was somewhat higher values in yellowing color index of cured leaves, and less brittle than those in conventional drying program. As to the chemical properties, there was no difference in chemical component levels in cured leaves between the modified and the conventional methods, while the major chemical compounds in relation to aromatic essential oil of cured leaves showed mostly higher level in the modified method than that in conventional drying method. Additionally 3 step-up drying method increased the tobacco quality by 2 % in price per kg compared with conventional drying method.

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On the maintenance of Semimanufactured Tobacco(cut tobacco) quality during Shipping or Long Term Straging (수송 또는 보관중 반제품(각초) 담배의 품질유지에 관하여)

  • 민영근;정한주;김기환;양광규
    • Journal of the Korean Society of Tobacco Science
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    • v.14 no.1
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    • pp.57-65
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    • 1992
  • The quality of cut tobacco will be deteriorated due to weather conditions such as temperature and relative humidity, when shipping and long term storaging. The change of equilibrium moisture contents in cut tobacco were under influence of relative humidity and temperature but not humectants. Therefore internal packing materials are necessary for cut tobacco to maintain initial quality, including taste, flavour and musty smell during shipping or storaging. When packing cut tobacco for shipping or long term storaging, desiralbe packing density was 200/$m^2$, For the long term storage under R.H 90% and 3$0^{\circ}C$, polyethylene film thickness suitable for packing material are above 100$\mu$, which resulted in 42days of shelf life.

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Relation of Climatic Factors and Leaf Tobacco Quality (기상요인과 잎담배 품질과의 관계)

  • 이용득
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.40 no.1
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    • pp.120-124
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    • 1995
  • The study was conducted to investigate the relationships between tobacco leaf pro-duction rate by quality grade and the value of climatic factors in tobacco growing season. In flue cured tobacco(NC82), high quality was positively corretated with precipitation in late April and May, with sunshine' hours in early May and late June, with average temperature in middle July, significanly. In Burley tobacco(Br21), high quality was positively correlated with precipitation in late April and May, with sunshine hours in early May and early July, with average temperature in middle July, significantly.

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Manufacture of Sheet Tobacco Using Orient Scraps (오리엔트 잎담배 부산물(scraps)을 이용한 판상엽 제조)

  • 김용옥;김기환;김천석;박영수;이태호
    • Journal of the Korean Society of Tobacco Science
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    • v.19 no.1
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    • pp.51-56
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    • 1997
  • This experiment was conducted to reduce the cost of orient leaf using izmir, samsun and basma scraps in cigarettes manufacturing process. We manufactured rolled and paper sheet tobacco using orient scraps and substituted orient leaf in Pine tree to the rolled and paper sheet tobacco using orient scraps. Orient scraps were lower in total sugar, total sugar/nicotine and total nitrogen/nicotine, higher in nicotine and crude ash than those of orient leaves. Izmir and basma scraps were higher of 2-methyl butanoic, 3-methyl butanoic and 3-methyl pentanoic acid, but the chemical contents in samw scraps were lower than those of orient leaves. The specific gravity thickness, flness index, filling value were similar between orient scraps blended sheet tobacco and present sheet tobacco. The physical characteristics of orient scraps blended sheet tobacco were within Present sheet tobacco quality specification. The sheet tobacco using orient scraps was higher 2-metal butanoic, 3-methyl butanoic and 3-methyl pentanoic acid than those of present sheet tobacco. The rolled processed sheet tobacco using orient scraps was higher 2-methyl butanoic, 3-methyl butanoic and 3-methyl Pentanoic acid than those of paper sheet tobacco using orient scraps. The sample cigarettes using orient scraps sheet tobacco were lower 2-methyl butanoic, 3-mettwl butanoic and 3-mettwl Pentanoic acid than those of control cigarettes. The result of sensory test showed no great difference compared with sample of orient scraps and control cigarettes. This result shows that we can possible to substitute orient leaf to orient scraps to reduce the cost of orient leaf.

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The Feeding Preference of Cigarette Beetle, Lasioderma serricorne F., on Cured Tobacco Leaves. (궐련벌레의 원료 잎담배 식이 선호성에 관한 연구)

  • 오명희
    • Journal of the Korean Society of Tobacco Science
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    • v.16 no.2
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    • pp.122-127
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    • 1994
  • Feeding preference of cigarette beetle, Lasioderma sewicorne F., on cured tobacco leaves was investigated to obtain basic information on ecological management of the insect pest in tobacco storage warehouses. About 3, 000-4, 000 adults of the insect were released in a warehouse in which groud tobacco leaves were placed on the bottom and at 3m above the floor level, and numbers of insects attracted were examined. There was no significant difference on feeding preference between the two tobacco varieties, flue-cured(NC82) and air-cured(Br3l) tobacco leaves. However, significant differences were noted in feeding preference between thick and thin leaves and among different quality grades within a tobacco variety. Feeding preferences of cigarette beetle between flue- and air- cured tobacco varieties showed significant differences on the lower position, though there were no differences on the 3m upper position. On the 3m upper position, feeding preferences were different between thick and thin leaves of tobacco varieties, and variety X thickness and variety X thickness equality grades showed statistically significant differences. Significantly higher feeding preference by cigarette beetle adults was observed for the food placed on the 3m upper than on the lower position. There were negative correlations between quality grades of cured tobacco leaves and feeding preference on the lower position, and the regression equation was Y(feeding preference)=4.050-0.683 X (degree).

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EFFECT OF TEMPERATURE AND HUMIDITY ON THE LEAF COLOR AND CHEMICAL COMPONENTS DURING THE YELLOWING STAGE OF FLUE-CURING (황색종 연초 건조중 황변기 온습도차가 잎담배 색상 및 화학성분에 미치는 영향)

  • Hwang, Keon-Joong;Seok, Yeong-Seon;Lee, Han-Seok
    • Journal of the Korean Society of Tobacco Science
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    • v.7 no.2
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    • pp.129-139
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    • 1985
  • cent was carried out to study on the effect of temperature and humidity to chemical tobacco leaves during the yellowing stage. The results were follows : In the condition of high humidity and low temperature, yellowing time was delayed ; leaf color appeared lack clearness. In the higher temperature and the lower humidity during the yellowing stage : total sugar, reducing sugar and malic acid content were increased. Decomposition of nitrogenous components elevated in $38^{\circ}C$, 85%RH. Changes of total nitrogen content correlated with total curing time. Adecrease of linolenic acid with a corresponding increase of chlorogenic acid proceeded in the condition of low temperature and high humidity. In a view of tobacco quality by chemical components, the low temperature and high humidity during the yellowing stage decreased quality of tobacco leaves. It is considered to control of the proper condition of temperature and humidity during the yellowing.

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Identification of Nicotine Converter Plants in Burley Tobacco KB9118 (KB108)

  • Jung Suk-Hun;Chung Yun-Hwa;Keum Wan-Soo;Kang Yue-Gyu;Shin Seung-Ku;Jo Chun-Joon;Choi Sang-Ju
    • Journal of the Korean Society of Tobacco Science
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    • v.27 no.1
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    • pp.11-18
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    • 2005
  • The nicotine converter genotypes of burley tobacco (Nicotiana tabacum L.), which convert nicotine to nornicotine, contain a high amount of nornicotine that degrades tobacco quality and smoking taste. Elimination of nicotine converter plants before seed harvesting is required for breeding nicotine low-converter lines and for increasing their seed production. This study aims to develop a rapid and convenient method of identifying nicotine converter plants of burley breeding lines of KB9118(KB108) using thin-layer chromatography (TLC) and isatin coloration method. Out of 223 plants in 10 lines harvested at maturity in 2002, 102 plants ($45\%$) were identified as nicotine converters by TLC of tobacco leaves air-cured. For 16 lines selected as low-converters in 2002, 148 plants grown in the field in 2003 were tested by the isatin coloration method using two detached leaves at the flowering stage thoroughly sprayed with $1\%\;NaHCO_3$ solution and cured in conditioned chambers for the early identification of nicotine to nornicotine conversion. From these samples, 46 plants ($31\%$) in 4 lines were identified as nicotine converters, indicating that the ratio of converters significantly decreased by one time selection. Mean percent conversion of non-screened lines was $14\%$ higher than that of following generation. Therefore in the burley tobacco, a rapid and convenient means of identifying and removing nornicotine converter plants by the isatin coloration method during growth in the greenhouse or field were effective in reducing the converter plants in the following generation.

Evaluation of Cigarette Quality by Measurement of Oxygen Free Radicals in Smoke (담배 연기 중 산소 자유 라디칼 측정에 의한 품질 평가)

  • Ji-Chang Park;Kyung-Ran Yoon;Young-Ha Rhee;Cheong Ho Lee
    • Journal of the Korean Society of Tobacco Science
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    • v.12 no.1
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    • pp.19-27
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    • 1990
  • To evaluate tobacco quality, several mathods including sensory test, or measurement of some toxic compounds such as tar, nicotine and carbon monoxide in cigarette smoke have been used. However, many detrimental effects of smoking on the physiological functions including respiratory system reported were turned out to be the action of reactive oxygen species. Therefore, the amounts of oxygen free radicals such as superoxide, hydroxyl radical, even hydrogen peroxide in the cigarette smoke are thought the very important factors. In the present study, we have determined the generation of superoxide and the content of hydrogen peroxide using superoxide dismutase and catalase in the gas and particulate phases obtained from cigarette smoke, respectively. In the aqueous extracts of total particulate materials, suproxide and hydrogen peroxide were detected, and there was an excellent correlation between oxygen tint of oxygen free radicals in cigarette smoke may be a useful index for evaluation of cigarette quality in the aspect of smoking and health.

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