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R Rich

Publications and source records attributed to R Rich.

25 records · Page 2Linked to original sources
PubMed1967

Enzyme-induced formation of spheres from cells and envelopes of Escherichia coli.

Normal and filamentous whole cells and isolated envelopes of Escherichia coli B were exposed to various enzymatic treatments to remove surface layers and to characterize the component(s) conferring rigidity in this organism. Modification of cell rigidity was determined by sphere formation in both whole cells and isolated envelopes. Enzymes capable of converting trypsinized normal or untreated filamentous whole cells and untreated envelopes to spheres included: lysozyme plus ethylenediaminetetraacetic acid, clostridial phospholipase C, and phospholipase D from cabbage. These data suggest that there are at least two components essential for maintenance of cell rigidity in E. coli B. The first is the peptidoglycan (mucopeptide), which is susceptible to lysozyme. The second is a phospholipid which is either covalently linked to the mucopeptide or in close association with it. This phospholipase C-sensitive component is protected more completely in normal than in filamentous whole cells by a protein layer which is easily modified by trypsin treatment to allow enzymatically induced sphere formation to occur.

Cell Wall↗
PubMedDate not supplied

Therapeutic uses of sexually explicit materials in the United States and the Czech and Slovak Republics: a qualitative study.

This study investigates the reflections of 279 U.S. and Czech and Slovak mental health and health professionals about their use of sexually explicit materials. Professionals were 2.6 times as likely to cite specific instances when their use of sexually explicit materials was useful with their clients and students than they were to cite instances when such materials were not useful. In addition, no significant differences were observed between the ways in which U.S. and Czech and Slovak mental health and health professionals evaluated these materials. The article presents several suggestions for the judicious and efficacious use of sexually explicit materials in therapy or in the classroom in either Western or Central European settings.

Adult↗