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Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Fengtang plum is popular with consumers because of its unique taste and high nutritional value. In this paper, three different harvest maturity Fengtang plums were used as experimental materials. After treated with 0.5 μL/L and 1.0 μL/L 1-methylcyclopropene (1-MCP), the fruits was stored at (25 ± 2)°C for 14 days. The decay rate, respiratory intensity, ethylene release rate, firmness, color, soluble solid content, titratable acid content, and solid-acid ratio were measured every 2 days, and sensory evaluation was made. In addition, the effects of 1-MCP on the shelf quality and volatile substances of different maturity plums were analyzed by GC-MS. Results showed that the Fengtang plum was a typical non-climacteric fruit. Harvest maturity was the main reason affecting the quality change of Fengtang plums during their shelf life. The higher the harvest maturity, the higher the decay rate of plum fruit during shelf life, the more vigorous the respiration, the more rapid the quality deterioration. A high concentration of 1-MCP (1.0 μL/L) treatment could delay the quality deterioration of different maturity plum fruit during shelf life, and the effect of high maturity (110 days after flowering) fruit preservation was the most obvious. GC-MS analysis showed that aldehydes (grassy aroma) and esters (fruit aroma) were the main volatile substances in Fengtang plums, and the higher the harvest maturity, the lower the aldehyde content and the higher the ester content. Different concentrations of 1-MCP treatment could delay the decrease of aldehyde content and the increase of ester content during the shelf life of plum fruit, and more effectively maintain the inherent aroma of plum fruit. Combined with the results of the solid-acid ratio and sensory evaluation, the high-maturity plum fruit had the best flavor during shelf life. 1-MCP treatment (1.0 μL/L) could effectively delay the quality deterioration and flavor loss of different maturity plum fruit during shelf life and had the best shelf preservation effect on high-maturity plum fruit. [ABSTRACT FROM AUTHOR]

[Objective] In order to clarify the influence of harvest maturity on the industrial availability of the cutters of flue-cured tobacco CB-1.[Method] A comparative curing test on different harvest maturity of the cutters of CB-1 was conducted, to test and compare the quality traits of cured tobacco leaves in each treatment. [Result] The results show that, the appearance quality, grade structure and average price of tobacco leaves of ripe treatment was the best, mature treatment was second, unripe treatment was worse, overmature treatment was the worst. The high-class tobacco proportion of ripe treatment (75.63%) was higher than mature treatment (67.69%) 11.73%, higher than unripe treatment (63.92%)18.32%, higher than overmature treatment (12.38%) 510.90%. The average price of ripe treatment (36.36 yuan/kg) was 3.18% higher than mature (35.24 yuan/kg),6.69% higher than unripe (34.08 yuan/kg),74.96% higher than overmature (20.78 yuan/kg). With increasing harvest maturity, the total sugar, reduced sugar content and the ratio of sugar/nicotine of cured tobacco leaves tend to be better, and the chemical composition is more coordinated. The total aroma composition decreased with the increasing harvest maturity, the total aroma composition of unripe (598.75 µg/g) was 0.85% higher than mature (593.71 µg/g), 10.77% higher than ripe (540.53 µg/g), and 51.82% higher than overmature (394.39 µg/g). With increasing harvest maturity, the ratio of damascenone which contributes the most to the fresh-aroma type style, and solanone which contributes the most to the full-aroma style, showed a significantly decreased trend, unripe (7.83) was highest, mature was second (6.18), ripe was third (4.96), overripe (3.90) was lowest. It means that the fresh-aroma style was significantly weakened. [Conclusion] In general, the ripe tobacco leaves have the best quality, industrial availability and economic benefits, and mature was second, and unripe and overripe were inferior. The ripe and mature are the appropriate harvest maturity standard in the cutters of CB-1. [ABSTRACT FROM AUTHOR]

In order to explore the appropriate harvest maturity of cigar wrapper leaves, the effects of different harvest maturity on the main ag- ronomic characters, physical indicators, chemical components and appearance quality of cigar wrapper middle leaves after air-curing were studied. The results showed that with the increase of harvest maturity, the SPAD value and water content of fresh wrapper leaves decreased, while the chromaticity value increased. After air-curing, the leaf thickness, leaf surface density and tensile force of leaves first increased and then decreased. The ratio of two sugars first increased and then decreased, while the nitrogen base ratio and potassium chloride ratio decreased; The scores of maturity and oil content increased, while the scores of branch thickness and flatness decreased. Considering the physical charac- teristics, chemical composition and appearance quality, the appearance characteristics of the cigar wrapper middle leaves that were suitable for harvest maturity; leaf color was greenish yellow (greenish to yellowish), with 1/3 of the main veins turning white, and 1/4 of the branch veins turning white with a small amount of tomenta falling off. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] The puipose of the article was to ascertain the precise criterion of maturity of fresh tobacco leaves. [Method] Using flue-cured tobacco K326 as test material, the effects of different maturity were studied on the botanical characteristics, photosynthetic characteristics, main chemical components, tissue structure and cell ultrastructure, as well as the yield and quality of due-cured tobacco leaves. [Result]The best quality, the most harmonization of the internal chemical composition and the highest quality of sensory evaluation were the proper maturity treatment of the tobacco leaves. Through the best treatment of production and quality, the standard of the proper maturity was deduced, and the indexes of botanical characteristics of the freshly harvested K326 middle part were first explored. Several botanical characteristics were the leal' color yellowish, yellowing by 80 % . 60 % whitening of main vein, 40 % whitening of branch vein, stem and leaf angle of 70°, 70 % mature spots, hair loss nearly 50 % . The other indexes were SPAD value of middle tobacco leaves 23. 5, total sugar content 14.02 %, reducing sugar content 10.63 %, starch content 25. 42 %, protein content 12.02 %, palisade tissue thickness 58. 94 μm。, sponge tissue thickness 68.54 μm。. [Conclusion] This study provided a theoretical basis for improving the reasonable maturity and easy roasting of K326 varieties. [ABSTRACT FROM AUTHOR]

To find out the appropriate number and harvest maturity of tobacco leaves for cigar variety (GH1) in Shifang area, the effects of the number of leaves and harvest maturity on the chemical composition and the quality of tobacco leaf were analyzed; The amount of total nitrogen and nicotine in cigar tobacco leaves were significantly influenced by the number of tobacco leaves, while the contents of ash and potassium in tobacco leaves were not significantly affected; Both of the number and harvest maturity affected sensory quality of cigar tobacco leaves significantly, and harvest maturity was the more powerful one; The optimal number of leaves for cigar variety (GH1) was 16. When the upper leaves were at stage of under-ripe or delayed in 3 days, they were suitable for harvest, while the harvest of lower part leaves should be 6 days later than the stage of under-ripe. [ABSTRACT FROM AUTHOR]