AbstractDas Glyoxyloylanthranilsäureoxim (I) bil‐ ,.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorometric assay of methyl ketonesDavid N. Kramer, Lucio U. Tolentino, and Ethel B. HackleyCite this: Anal. Chem. 1972, 44, 13, 2243–2246Publication Date (Print):November 1, 1972Publication History Published online1 May 2002Published inissue 1 November 1972https://pubs.acs.org/doi/10.1021/ac60321a034https://doi.org/10.1021/ac60321a034research-articleACS PublicationsRequest reuse permissionsArticle Views94Altmetric-Citations3LEARN 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

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew sensitive method for quantitative assay of ammonia in airDavid N. Kramer and John M. SechCite this: Anal. Chem. 1972, 44, 2, 395–398Publication Date (Print):February 1, 1972Publication History Published online1 May 2002Published inissue 1 February 1972https://doi.org/10.1021/ac60310a054Request reuse permissionsArticle Views81Altmetric-Citations4LEARN 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 InReddit PDF (403 KB) Get e-Alertsclose Get e-Alerts

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAssay of phenols and arylamines via oxidative couplingDavid N. Kramer and Lucio U. TolentinoCite this: Anal. Chem. 1971, 43, 7, 834–837Publication Date (Print):June 1, 1971Publication History Published online1 May 2002Published inissue 1 June 1971https://pubs.acs.org/doi/10.1021/ac60302a021https://doi.org/10.1021/ac60302a021research-articleACS PublicationsRequest reuse permissionsArticle Views131Altmetric-Citations14LEARN 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

During the investigation of the photochemical decarbonylation of aryl lactones1 as a simple synthesis of o–fuchsones of general type 2, both the starting lactones 1 and the photoproducts 2 were examined by mass spectrometry.

The literature contains few references to the reactions of phosphonate esters with iron salts. Guilbault et al. 1 recently studied the infrared spectrs of diisopropyl methylphosphonate (DIMP) and dimethyl methylphosphonate (DIMP) chemisorbed on solid FeCl 3 and made infrared band assignments. We wish to report the results of a study of the products of the homogeneous reaction of DIMP, DMMP and diethyl ethylphosphonate (DEEP) with ferric chloride. On the basis of elemental analysis and infrared absorption data, the products isolated were identified as tris (methylmethylphosphonate) iron (III), tris (ethyl ethylphosphonate) iron (III), and tris (isopropyl methylphosphonate) iron (III). Key Words: infrared spectraorganophosphorus-inorganic saltsstructures

A multicyclic catalytic scheme for the vapor detection of the organophosphorus compound isopropyl methylphosphonofluoridate, GB, is described. A detector tube containing silica gel impregnated with 1-phenyl-1,2,3-butanetrione 2-oxime, o-dinitrobenzene, and p-nitrobenzaldehyde detected 0.12 and 0.3 μg of GB in 5 and 3 minutes, respectively.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReduction of methyl viologen by cyanohydrin anionsDavid N. Kramer, George G. Guilbault, and F. Marion MillerCite this: J. Org. Chem. 1967, 32, 4, 1163–1165Publication Date (Print):April 1, 1967Publication History Published online1 May 2002Published inissue 1 April 1967https://pubs.acs.org/doi/10.1021/jo01279a068https://doi.org/10.1021/jo01279a068research-articleACS PublicationsRequest reuse permissionsArticle Views194Altmetric-Citations4LEARN 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

An electrochemical method is described for the determination of the enzyme glucosidase and of mercury (II) which inhibits this enzyme. The method is based on the liberation of cyanide from the substrate amygdalin; the cyanide produced is measured using a silver-platinum electrode combination in a spontaneous (internal) electrolysis cell. The changes in potential with time, ΔE/min, were found to be proportional to the activity of glucosidase over the range 0.00156–0.0780 unit/ml, and to the concentration of mercury (II) from 1 × 10−5 to 5 × 10−7M.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular and spectral properties of .alpha.-cyano-N-benzylidene anilsJohn W. Ledbetter Jr., David N. Kramer, and F. Marion MillerCite this: J. Org. Chem. 1967, 32, 4, 1165–1168Publication Date (Print):April 1, 1967Publication History Published online1 May 2002Published inissue 1 April 1967https://pubs.acs.org/doi/10.1021/jo01279a069https://doi.org/10.1021/jo01279a069research-articleACS PublicationsRequest reuse permissionsArticle Views95Altmetric-Citations6LEARN 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

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew substrate for fluorometric determination of oxidative enzymesGeorge G. Guilbault, David N. Kramer, and Ethel B. HackleyCite this: Anal. Chem. 1967, 39, 2, 271Publication Date (Print):February 1, 1967Publication History Published online1 May 2002Published inissue 1 February 1967https://pubs.acs.org/doi/10.1021/ac60246a029https://doi.org/10.1021/ac60246a029research-articleACS PublicationsRequest reuse permissionsArticle Views199Altmetric-Citations87LEARN 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 fluorometric method is described for the assay of the enzyme hyaluronidase and of Cu(II), Fe(II), and cyanide ions which inhibit the enzymic activity. The method for hyaluronidase is based upon the hydrolysis of the nonfluorescent indoxyl acetate by the enzyme to give the highly fluorescent indigo white (λex = 395 mμ, λem = 470 mμ). Metal ions, such as Fe++ and Cu++, and CN−, which inhibit the enzyme, can be determined by recording their effect on the enzymic activity. By this procedure, from 0.0010 to 0.0330 μg/ml of hyaluronidase, 0.10 to 4.0 μg/ml of CN−, 0.20 to 12 μg/ml of Fe++, and 0.20 to 6 μg/ml of Cu++ could be determined with standard deviations of 1.8% for hyaluronidase and 2.3% for the inhibitors. Evidence is offered to demonstrate hyaluronidase, and not esterase, activity.

A series of fluorescein and eosin esters have been prepared for use in the assay of the activity of lipase and acylase: the diacetyl, dipropionyl, dichloropropionyl, dibutyryl, divaleryl, and dicaproyl esters of fluorescein, and the diacetyl, dipropionyl, and dibutyryl esters of eosin. The eosin esters were found to hydrolyze extremely slowly in the presence of enzyme, even at pH's as high as 10.0. The rate of hydrolysis of the fluorescein esters by all enzymes except porcine pancreas lipase was found to decrease in the order: acetyl > propionyl > butyryl > valeryl > caproyl. With porcine pancreas, the divaleryl and dicaproyl esters of fluorescein had a higher rate of hydrolysis than the dibutyryl ester. Steapsin, porcine pancreas, and wheat germ lipase, as well as acylase, catalyze the hydrolysis of fluorescein esters to fluorescein. The order of activity is porcine pancrease > acylase > steapsin > wheat germ lipase.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDihydropyran Derivatives of Secondary Aromatic AminesLawrence G. Vaughan and David N. KramerCite this: J. Org. Chem. 1966, 31, 6, 1982–1983Publication Date (Print):June 1, 1966Publication History Published online1 May 2002Published inissue 1 June 1966https://pubs.acs.org/doi/10.1021/jo01344a513https://doi.org/10.1021/jo01344a513research-articleACS PublicationsRequest reuse permissionsArticle Views124Altmetric-Citations3LEARN 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

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRapid, sensitive kinetic method for detection and determination of phenolic compoundsGeorge G. Guilbault, David N. Kramer, and Ethel B. HackleyCite this: Anal. Chem. 1966, 38, 13, 1897–1899Publication Date (Print):December 1, 1966Publication History Published online1 May 2002Published inissue 1 December 1966https://pubs.acs.org/doi/10.1021/ac50155a055https://doi.org/10.1021/ac50155a055research-articleACS PublicationsRequest reuse permissionsArticle Views64Altmetric-Citations6LEARN 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

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Reduction of 1,2-Dinitrobenzene by the Cyanohydrin of p-NitrobenzaldehydeDavid N. Kramer and George G. GuilbaultCite this: J. Org. Chem. 1966, 31, 4, 1103–1106Publication Date (Print):April 1, 1966Publication History Published online1 May 2002Published inissue 1 April 1966https://pubs.acs.org/doi/10.1021/jo01342a027https://doi.org/10.1021/jo01342a027research-articleACS PublicationsRequest reuse permissionsArticle Views374Altmetric-Citations8LEARN 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

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltra Sensitive, Specific Method for Cyanide Using p-Nitrobenzaldehyde and o-Dinitrobenzene.G. G. Guilbault and D. N. KramerCite this: Anal. Chem. 1966, 38, 7, 834–836Publication Date (Print):June 1, 1966Publication History Published online1 May 2002Published inissue 1 June 1966https://pubs.acs.org/doi/10.1021/ac60239a009https://doi.org/10.1021/ac60239a009research-articleACS PublicationsRequest reuse permissionsArticle Views448Altmetric-Citations73LEARN 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

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Immobilized Cholinesterase for Use in Analytical Chemistry.E. K. Bauman, L. H. Goodson, G. G. Guilbault, and D. N. KramerCite this: Anal. Chem. 1965, 37, 11, 1378–1381Publication Date (Print):October 1, 1965Publication History Published online1 May 2002Published inissue 1 October 1965https://doi.org/10.1021/ac60230a023Request reuse permissionsArticle Views84Altmetric-Citations84LEARN 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 InReddit PDF (1 MB) Get e-Alertsclose Get e-Alerts