The present invention provides a device for modifying an atmosphere in proximity to the device, the device comprising a sachet comprising a semipermeable material, and a composition including a mixture of acetylsalicylic acid and sodium bicarbonate contained within a cavity of the sachet. The invention further provides methods for modifying an atmosphere comprising placing a mixture of a carboxylic acid and a base in the atmosphere, wherein the atmosphere has a sufficient level of water vapor such that, upon contact of the water vapor with the mixture, carbon dioxide is produced.
A method and means for enhancing the inner environment of a package containing perishable merchandise include taking a closable package containing perishable merchandise and placing in the package a multi-layered sheet including a plurality of layers comprised of moisture absorbing materials to absorb any residual moisture emanating from the perishable merchandise. The multi-layered sheet includes a quantity of CO
2
generating material incorporated therein. The CO
2
generating material is exposable to humidity and any residual moisture within the package and any moisture absorbing material to allow the CO
2
generating material to emit an atmosphere of CO
2
within the package from exposure to moisture within the air in the package, and to absorb any residual moisture in the package.
一种用于改善装有易腐商品的包装内部环境的方法和装置,包括取一个装有易腐商品的可封闭包装,并在包装内放置一个多层薄片,该多层薄片包括由吸湿材料组成的多层,以吸收易腐商品散发出的任何残余湿气。多层板包括一定量的 CO
2
生成材料。二氧化碳
2
生成材料可暴露于湿度、包装内的任何残留湿气以及任何吸湿材料中,使 CO
2
生成材料释放出二氧化碳气体。
2
并吸收包装内的任何残留湿气。
Alicyclic Claisen rearrangement. A general carbocycle synthesis based on four-atom-ring contractions of lactones
作者:Matthew M. Abelman、Raymond L. Funk、John D. Munger
DOI:10.1021/ja00378a054
日期:1982.7
ABELMAN, M. M.;FUNK, R. L.;MUNGER, J. D. ,, JR, J. AMER. CHEM. SOC., 1982, 104, N 14, 4030-4032
作者:ABELMAN, M. M.、FUNK, R. L.、MUNGER, J. D. ,, JR
DOI:——
日期:——
FUNK R. L.; ABELMAN M. M.; MUNGER J. D., JR., TETRAHEDRON, 42,(1986) N 11, 2831-2846