ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSome Ion-Exchange Studies of the Polymerization of Beryllium1Isaac Feldman and Jean R. HavillCite this: J. Am. Chem. Soc. 1952, 74, 9, 2337–2340Publication Date (Print):May 1, 1952Publication History Published online1 May 2002Published inissue 1 May 1952https://pubs.acs.org/doi/10.1021/ja01129a046https://doi.org/10.1021/ja01129a046research-articleACS PublicationsRequest reuse permissionsArticle Views34Altmetric-Citations10LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Abstract The fluorescence parameters, lifetime, relative quantum yield, maximum and mean wavelength, half‐width, and polarization, of bovine serum albumin (BSA) were measured at 15°C in aqueous solutions containing varying concentrations of different chemical perturbants, glycerol, Cu 2+ ions, guanidine hydrochloride, and urea. By considering a quenching mechanism as being either dynamic or static, depending upon whether the quenching is or is not accompanied by a change in the fluorescence lifetime, we were able to correlate the changes produced in the various fluorescence parameters by the different chemical perturbants with changes in macromolecular structure as the concentration of perturbant was gradually increased. The addition of glycerol and of Cu 2+ ions indicated that in aqueous BSA both tryptophan residues are below the surface of the macromolecule, out of contact with solvent water, and, as a consequence, they are statically quenched. “Ultra‐Pure” guanidine hydrochloride at 2.4 M or more caused a drastic conformation change, which resulted in the emergence of a visible tyrosine peak at 304 nm in the BSA fluorescence spectrum when either 260‐ or 270‐nm excitation was employed. With the same excitation, the enhancement of BSA tyrosine fluorescence by 6–8 M ultra‐pure urea produced only a shoulder near 304 nm in the BSA fluorescence spectrum. We have introduced the use of a new relative quantum yield for protein fluorescence, q ′, referenced to the quantum yield of unquenched free tryptophan, which eliminates the quenching action of water from the reference.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence-quenching study of glucose binding by yeast hexokinase isoenzymesIsaac Feldman and Douglas C. KrampCite this: Biochemistry 1978, 17, 8, 1541–1547Publication Date (Print):April 18, 1978Publication History Published online1 May 2002Published inissue 18 April 1978https://pubs.acs.org/doi/10.1021/bi00601a029https://doi.org/10.1021/bi00601a029research-articleACS PublicationsRequest reuse permissionsArticle Views139Altmetric-Citations24LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
A significant minority of Israel's population is not Jewish. Approximately twenty percent are Palestinians who are citizens of the country and receive many, though significantly not all, the benefits of such citizenship (this circumstance describes Israel, not the occupied territories). The presence of large numbers of Palestinians within its boundaries has posed a problem for the self-defined Jewish state from its creation. Palestinian citizenship in Israel has, in turn, often posed a problem for this population's relationship with the wider Palestinian and Arab communities. Hillel Cohen considers the first decades of Israel's existence—a time when its Arab citizens lived under the strictures of military rule—and investigates the complex array of mechanisms through which the state governed this population and the population engaged the state. This compelling and important book, which draws on recently opened police files housed in the Israel State Archives, is in many ways a companion to Cohen's...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdditions and Corrections - Chelation of Uranyl Ions by Adenine Nucleotides. II. Proton Magnetic Resonance Investigation of the Uranyl Nitrate-Adenosine 5'-Monophosphate Chelate in D2O at Basic pDRaghunath Agarwal and Isaac FeldmanCite this: J. Am. Chem. Soc. 1969, 91, 9, 2411Publication Date (Print):April 1, 1969Publication History Published online14 April 2004Published inissue 1 April 1969https://pubs.acs.org/doi/10.1021/ja01037a604https://doi.org/10.1021/ja01037a604research-articleACS PublicationsRequest reuse permissionsArticle Views24Altmetric-Citations2LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
