Fruit and vegetable processing and food technology: a summary of research

Evaluation of tomato cultivars for processing / W. A. Gould and R. Stillabower -- Physical and subjective color evaluation of tomato juice / Kenneth L. Beck and W. A. Gould -- Flavor evaluation of tomato juice fortified with sugar and citric acid / J. A. Gould and W. A. Gould -- Effects of citric acid and sugar ratios on thermal resistance of Bacillus coagulans var. thermoacidurans in tomato juice / Dennis L. Gierhart and W. A. Gould -- Protein bodies of the germinating tomato seed cotyledon / L. K. Eggers and J. R. Geisman -- Studies concerning the protein of tomato seeds recovered from tomato cannery waste / L. K. Eggers and J. R. Geisman -- Lipid composition of cucumber / A. C. Peng -- Fatty acids in fresh and recycled brines / A. C. Peng and J. R. Geisman -- Repeated recycling of spent pickle brine affects pickle quality / J. R. Geisman and M. Lazear -- Evaluation of snap bean cultivars for processing / W. Gould, J. Gould, J. Mount, M. Skoog and R. Stillabower -- Evaluating strawberries for freezing / J. F. Gallander and J. F. Stetson -- Grapes for Ohio wines / J. F. Gallander and J. F. Stetso

A Device for Performing Lateral Conductance Measurements on Individual Double-Stranded DNA Molecules

A nanofluidic device is described that is capable of electrically monitoring the driven translocation of DNA molecules through a nanochannel. This is achieved by intersecting a long transport channel with a shorter orthogonal nanochannel. The ionic conductance of this transverse nanochannel is monitored while DNA is electrokinetically driven through the transport channel. When DNA passes the intersection, the transverse conductance is altered, resulting in a transient current response. In 1 M KCl solutions, this was found to be a current enhancement of 5–25%, relative to the baseline transverse ionic current. Two different device geometries were investigated. In one device, the DNA was detected after it was fully inserted into and translocating through the transport nanochannel. In the other device, the DNA was detected while it was in the process of entering the nanochannel. It was found that these two conditions are characterized by different transport dynamics. Simultaneous optical and electrical monitoring of DNA translocation confirmed that the transient events originated from DNA transport through the nanochannel intersection