L-arginine phosphate is a promising new material for generating harmonics of the Nd: YAG fundamental wavelength, 1064 nm. The synthesis of 20 other salts of L-arginine was attempted and millimeter size crystals of 10 of these were obtained. These were analyzed for crystal structure and chemical composition and the linear and nonlinear optical properties were measured. The compounds were all oprically biaxial and several gave second harmonic signals greater than quartz. Phasematching has been observed in four of the crystals to date.

We have designed and built an apparatus for the purpose of exposing samples of solid polymers to varying temperatures, atmospheres and stress levels wh

Journal of Applied Polymer ScienceVolume 29, Issue 12 p. 4439-4442 NoteFree Access Chemiluminescence of polysiloxane cushions: Correlation with physical properties† S. B. Monaco, S. B. Monaco Lawrence Livermore National Laboratory P. O. Box 808 L-329 Livermore, California 94550Search for more papers by this authorL. D. Davis, L. D. Davis Lawrence Livermore National Laboratory P. O. Box 808 L-329 Livermore, California 94550Search for more papers by this authorJ. H. Richardson, J. H. Richardson Lawrence Livermore National Laboratory P. O. Box 808 L-329 Livermore, California 94550Search for more papers by this author S. B. Monaco, S. B. Monaco Lawrence Livermore National Laboratory P. O. Box 808 L-329 Livermore, California 94550Search for more papers by this authorL. D. Davis, L. D. Davis Lawrence Livermore National Laboratory P. O. Box 808 L-329 Livermore, California 94550Search for more papers by this authorJ. H. Richardson, J. H. Richardson Lawrence Livermore National Laboratory P. O. Box 808 L-329 Livermore, California 94550Search for more papers by this author First published: December 1984 https://doi.org/10.1002/app.1984.070291276Citations: 2 † Work performed under the auspices of the U. S. Department of Energy by the Lawrence Livermore National Laboratory under Contract No. W-7405-ENG-48. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat References 1 G. K. Baker, Bendix Kansas City, Rept. BDX-613-2778, Kansas City, MO, 1979. 2 J. R. Porter, Bendix Kansas City, Rept. BID-A155, Kansas City, MO, 1981. 3 W. E. Cady, E. S. Jessop, A. T. Buckner, Lawrence Livermore National Laboratory, Rept. UCRL-53105, 1980. 4 R. K. Jungling, Bendix Kansas City, Rept. BID-A324, Kansas City, MO, 1982. 5 J. R. Porter, Bendix Kansas City, Rept. BID-A192, Kansas City, MO, 1981. 6 G. D. Mendenhall, Agnew Chem. Int. Ed., Engl. 16, 225 (1977). 7 G. D. Mendenhall, J. A. Hassell, and R. A. Nathan, NASA-CR-1747463, 1977. 8 S. B. Monaco and J. H. Richardson, Polymer News, 9, 230– 234 (1984). 9 W. E. Cady, E. S. Jessup, and A. T. Buckner, Lawrence Livermore National Laboratory, Rept. UCRL-53104, 1980. 10 W. E. Cady, E. S. Jessop, B. M. McKinley, and A. T. Buckner, Lawrence Livermore National Laboratory, Rept. UCRL-53124, 1981. 11 W. Noll, Chemistry and Technology of Silicones, Academic, New York, 1968, p. 397. 12 S. B. Monaco, J. H. Richardson, J. D. Breshears, S. M. Lanning, J. E. Bowman, and C. M. Walkup, Ind. Eng. Chem., Prod. Res. Dev., 21, 546 (1982). 13 G. K. Baker, Bendix Kansas City, Rept. BID-A346, Kansas City, MO, 1982. 14 M. O. Riley, J. R. Kolb, and E. S. Jessop, Lawrence Livermore National Laboratory, Rept. UCRL-87613, 1982. Citing Literature Volume29, Issue12December 1984Pages 4439-4442 ReferencesRelatedInformation

A computer-controlled stress chemiluminescence instrument has been designed and assembled. A LSI-11 microprocessor is used to ramp the stepping motor which applies the stress to the polymer sample. The computer also acquires data from the load cell and the photon counter, and outputs the essential data to either a printer or floppy disk for storage and subsequent manipulation. The stress chemiluminescence technique has been previously reported by Levy and Fanter: the significant result of this work is the correlation of an enhanced chemiluminescence signal in a low stress environment with the subsequent premature mechanical failure of the polymer sample. Currently only epoxy and nylon samples have been examined; not all epoxy polymers appear to have this correlation between mechanical failure and stress chemiluminescence signal (of course, previous work by Levy and Fanter indicated that not all polymers exhibit a correlation between stress and chemiluminescence). The technique will be extended to fibers, composites, and polymers subjected to accelerated aging.

Abstract A pilot-size brine handling system was operated from Magmamax Well 1 in southern California to study the characteristics of siliceous scale deposition and to evaluate the possibility of treating the brine with chemical additives to control scaling. The rates of formation, chemical constitution, and morphology of the scales were examined as functions of temperature, brine salinity, substrate material, and antiscalant additive activity. Potential antiscalant compounds were screened using a silica-precipitation inhibition test at 90°C. The most active classes of compounds were those containing polymeric chains of oxyethylene and polymeric nitrogen compounds that are cationic in character. The best single compound was Corcat P-18™ (Cordova Chemical Co. polyethylene imine; molecular weight ~1,800). This compound had no effect on the scale formed at 220°C but it reduced the rates of scaling at 125 and 90°C by factors of 4 and 18, respectively, and it also functioned as a corrosion inhibitor. The best additive formulation for the brines of the Salton Sea Geothermal field (SSGF) appears to be a mixture of an organic silica-precipitation inhibitor, a small amount of hydrochloric acid, and a phosphonate crystalline deposit inhibitor.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStress chemiluminescence of polymeric materials; predictive applications to the aging processSuzanne B. Monaco, Jeffery H. Richardson, James D. Breshears, Stanley M. Lanning, James E. Bowman, and Connie M. WalkupCite this: Ind. Eng. Chem. Prod. Res. Dev. 1982, 21, 4, 546–549Publication Date (Print):December 1, 1982Publication History Published online1 May 2002Published inissue 1 December 1982https://pubs.acs.org/doi/10.1021/i300008a007https://doi.org/10.1021/i300008a007research-articleACS PublicationsRequest reuse permissionsArticle Views69Altmetric-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 options Get e-Alerts

Pulsed laser excitation sources provide a convenient means of initiating and probing photophysical and photochemical processes at the semiconductor electrode-electrolyte interface. Both time-resolved optical and electrochemical measurements are used to characterize the dynamics of intra-electrode charge separation and interfacial charge transfer as a function of applied bias, solution composition, and electrode physical properties. The philosophy behind this approach to transient measurements will be illustrated with recent experimental results involving single crystal and polycrystalline electrodes.

Pulsed laser excitation sources provide a convenient means of initiating and probing photophysical and photochemical processes at the semiconductor electrode-electrolyte interface. Both time-resolved optical and electrochemical measurements are used to characterize the dynamics of intra-electrode charge separation and interfacial charge transfer as a function of applied bias, solution composition, and electrode physical properties. The philosophy behind this approach to transient measurements will be illustrated with recent experimental results involving single crystal and polycrystalline electrodes.