Moisture Sorption Isotherms of Various Tobaccos

Samejima, Toshiro; Soh, Yoshihiko; Yano, Toshimasa

doi:10.1080/00021369.1978.10863351

Cited by 3 publications

(2 citation statements)

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“…7, the values of Me for various kinds of tobacco were summarized in the previous paper,3) and the values of D for various operating conditions can be estimated with Eqs. (2) and (3). Therefore, the time course of the moisture sorption is predictable from Fig.…”

Section: Methodsmentioning

confidence: 89%

Moisture diffusion within shredded tobacco leaves.

Samejima

Yano

1985

Agricultural and Biological Chemistry

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The mechanismof moisture transfer into shredded tobacco was investigated in connection with moistening process control in cigarette manufacturing. For shredded tobaccos of less than about 1.0mmshred width, the moisture was sorbed mainly through the cut faces rather than through the leaf epidermis, indicating that the moisture diffusion within the leaf was the rate limiting step of moisture transfer. The moisture diffusion coefficient values within the cured tobacco leaf ranged from 8.80x 10~7 to 64.2x 10~7cm2-s~1 depending on the type of tobacco, the shred width of tobacco and the temperature at sorption. But these values were not affected by the relative humidity at sorption. The entire moisture transfer into the shredded tobacco leaves was predictable with the diffusion theory.

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Section: Methodsmentioning

confidence: 89%

Moisture diffusion within shredded tobacco leaves.

Samejima

Yano

1985

Agricultural and Biological Chemistry

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“…The economic importance of tobacco makes it one of the most often researched plants, which is an extremely important industrial production in China. , The quality of the final tobacco products in the industry not only depends on simply the tobacco shred’s moisture level but also is a matter of smoking characteristics of dry flue gas, pungent, insufficient flavor, etc. , It has always been a bottleneck technology of moisture retentivity and flavor enhancement to improve the quality of cigarettes in China. As a result of their polyhydroxy structure, polysaccharides can adsorb water and form a membrane on the surface of tobacco to reduce the loss of water, which featured excellent moisture adsorption and retention used in clinical medicine, cosmetics, and food preservation. − For example, the novel polysaccharide derived from Phyllobacterium sp.…”

Section: Introductionmentioning

confidence: 99%

Moisture Property and Thermal Behavior of Two Novel Synthesized Polyol Pyrrole Esters in Tobacco

et al. 2023

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To overcome the shortcomings of high relative humidity and harmful oxidation products from traditional humectants, excellent humectants and flavor precursors were reported herein. Glucosamine hydrochloride was used as the starting material for the cyclization, oxidation, and alkylation processes that produced pyrrole acid. Then, esterification occurred with polyol catalyzed by EDC and DMAP to give the target compounds 2-(2,3-dihydroxypropyl) 4-methyl 5-methyl-1-propyl-1H-pyrrole-2,4-dicarboxylate (Gpe) and (2-hydroxypropyl) 4-methyl 5-methyl-1-propyl-1H-pyrrole-2,4-dicarboxylate (Ppe). Nuclear magnetic resonance (1H NMR, 13C NMR), infrared spectroscopy (IR), and high-resolution mass recorded spectrometry (HRMS) were used to confirm the two novel polyol pyrrole ester compounds. When Gpe and Ppe were added to the tobacco shred, low-field nuclear magnetic resonance (LF-NMR) imaging was applied to assess the hygroscopicity and moisturizing capacity. Furthermore, thermogravimetry (TG) and pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS) techniques were applied to study their thermal behaviors. These results showed that the target compounds (Gpe and Ppe) are good humectants with thermal properties of high-temperature stability and flavor release.

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