微店是哪个公司的:哪位大哥大姐给小弟翻译一篇英文文章啊？

INTR0DUCT10N
The rate of diffusion of surfactants in gels is an important property both for the characterization of solute—gel interactions and for the design of nove1 applications of such materials(Kong et a1．． 1 997)． Conventionally， diffusion coefficients in gels are measured by monitoring the concentration of the diffusing solute in the solution outside the ge1． Holographic interferometry technique offers a powerful tool for non—contact measurement．It had been used to measure diffu
sion coefficients in binary liquid systems in the past(Becsey et a1．， 1971；Bochner et a1．，1976；Gabelmann—Gray et a1．，1979；Szydlows—ka et a1．， 1982； Ruiz—Bevia et a1． 1985)．
Recently， this technique was employed for liquid—gel or gel-gel system (Gustafsson et a1．，1993； Kosar et a1．， 1995 ； Ruiz-Bevia et a1 ．，1 989)．The method has several advantages．It is a direct method which avoids sampling and analysis of the liquid solution outside the ge1． No mass balances are needed since the concentration in the gel is monitored directly．But holographic
interferometry is based on photographic techniques， the process of film development makes their handling complicated．In this letter，we present digital speckle pattern interferometry (DSPI)and simple image processing to measure the diffusion coefficients in gels． The technique is also known as TV hologr aphy． A CCD cam era is used as the recording device．The main advantages of DSPI are the ease of recording the holographic interferograms and analyzing the data and the possibility of observing the object in near real—time．Quantitative phase information can be obtained with phase measuring algorithms．In the present work，the diffusion process of surfactants in agarose gels was monitored by DSPI．The diffusion coeficients were simply and directly meg sured form the interferograms． The theoretical simulation of diffusion coefficients was also perform ed and compared with experimental results．