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1. The ep --e'p eta reaction at and above the S11(1535) baryon resonance

Author

Thompson, R., Dytman, S., Kim, Ky, Mueller, J., Adams, Gs, Amaryan, Mj, Anciant, E., Anghinolfi, M., Asavapibhop, B., Auger, T., Audit, G., Avakian, H., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bertozzi, W., Bianchi, N., Biselli, A., Boiarinov, S., Bonner, Be, Briscoe, Wj, Brooks, W., Burkert, Vd, Calarco, Jr, Capitani, G., Carman, Ds, Carnahan, B., Cole, Pl, Coleman, A., Connelly, J., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J., Day, D., Degtyarenko, Pv, Demirchyan, Ra, Dennis, Lc, Airton Deppman, Sanctis, E., Vita, R., Dhuga, Ks, Djalali, C., Dodge, Ge, Doughty, D., Dragovitsch, P., Dugger, M., Eckhause, M., Efremenko, Yv, Egiyan, H., Egiyan, Ks, Elouadrhiri, L., Farhi, L., Feuerbach, Rj, Ficenec, J., Fissum, K., Freyberger, A., Funsten, H., Gai, M., Gavrilov, Vb, Gilfoyle, Gp, Giovanetti, K., Gilad, S., Girard, P., Griffioen, Ka, Guidal, M., Guillo, M., Gyurjyan, V., Hancock, D., Hardie, J., Heddle, D., Heisenberg, J., Hersman, Fw, Hicks, K., Hicks, Rs, Holtrop, M., Hyde-Wright, Ce, Ito, Mm, Jenkins, D., Kane, J., Khandaker, M., Kim, W., Klein, A., Klein, Fj, Klusman, M., Kossov, M., Kuhn, Se, Kuang, Y., Laget, Jm, Lawrence, D., Leskin, Ga, Longhi, A., Loukachine, K., Lucas, M., Magahiz, R., Major, Rw, Manak, Jj, Marchand, C., Matthews, Sk, Mcaleer, S., Mccarthy, J., Mcnabb, Jwc, Mecking, Ba, Mestayer, Md, Meyer, Ca, Minehart, R., Mirazita, M., Miskimen, R., Muccifora, V., Mutchler, Gs, Napolitano, J., Niyazov, Ra, Ohandjanyan, Ms, O Brien, Jt, Opper, A., Patois, Y., Peterson, Ga, Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Preedom, Bm, Price, Jw, Qin, Lm, Raue, Ba, Reolon, Ar, Riccardi, G., Ricco, G., Ripani, M., Ritchie, Bg, Ronchetti, F., Rossi, P., Roudot, E., Rowntree, D., Rubin, Pd, Salgado, Cw, Sanzone, M., Sapunenko, V., Sarty, A., Sargsyan, M., Schumacher, Ra, Shafi, A., Sharabian, Yg, Shaw, J., Shuvalov, Sm, Skabelin, A., Smith, T., Smith, C., Smith, Es, Sober, Di, Spraker, M., Stepanyan, S., Stoler, P., Taiuti, M., Taylor, S., Tedeschi, D., Tung, Ty, Vineyard, Mf, Vlassov, A., Weller, H., Weinstein, Lb, Welsh, R., Weygand, Dp, Whisnant, S., Witkowski, M., Wolin, E., Yegneswaran, A., Yun, J., Zhou, Z., Zhao, J., and Clas, Collaboration

Abstract

New cross sections for the reaction e p--e p eta are reported for total center of mass energy W = 1.5--1.86 GeV and invariant momentum transfer Q2 = 0.25--1.5 (GeV/c)(2). This large kinematic range allows extraction of important new information about response functions, photocouplings, and eta N coupling strengths of baryon resonances. Newly observed structure at W approximately 1.65 GeV is shown to come from interference between S and P waves and can be interpreted with known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.

Published
2000

2. Yeast-encapsulated essential oils: a new perspective as an environmentally friendly larvicide.

Author

Workman MJ, Gomes B, Weng JL, Ista LK, Jesus CP, David MR, Ramalho-Ortigao M, Genta FA, Matthews SK, Durvasula R, and Hurwitz I

Subjects
Animals, Green Chemistry Technology, Insecticides pharmacology, Larva drug effects, Mosquito Vectors drug effects, Plant Oils pharmacology, Saccharomyces cerevisiae, Aedes drug effects, Cell Encapsulation methods, Mosquito Control methods, Oils, Volatile pharmacology
Abstract

Background: Effective mosquito control approaches incorporate both adult and larval stages. For the latter, physical, biological, and chemical control have been used with varying results. Successful control of larvae has been demonstrated using larvicides including insect growth regulators, e.g. the organophosphate temephos, as well as various entomopathogenic microbial species. However, a variety of health and environmental issues are associated with some of these. Laboratory trials of essential oils (EO) have established the larvicidal activity of these substances, but there are currently no commercially available EO-based larvicides. Here we report on the development of a new approach to mosquito larval control using a novel, yeast-based delivery system for EO., Methods: Food-grade orange oil (OO) was encapsulated into yeast cells following an established protocol. To prevent environmental contamination, a proprietary washing strategy was developed to remove excess EO that is adsorbed to the cell exterior during the encapsulation process. The OO-loaded yeast particles were then characterized for OO loading, and tested for efficacy against Aedes aegypti larvae., Results: The composition of encapsulated OO extracted from the yeast microparticles was demonstrated not to differ from that of un-encapsulated EO when analyzed by high performance liquid chromatography. After lyophilization, the oil in the larvicide comprised 26-30 percentage weight (wt%), and is consistent with the 60-65% reduction in weight observed after the drying process. Quantitative bioassays carried with Liverpool and Rockefeller Ae. aegypti strains in three different laboratories presented LD 50 of 5.1 (95% CI: 4.6-5.6) to 27.6 (95% CI: 26.4-28.8) mg/l, for L1 and L3/L4 mosquito larvae, respectively. LD 90 ranged between 18.9 (95% CI: 16.4-21.7) mg/l (L1 larvae) to 76.7 (95% CI: 69.7-84.3) mg/l (L3/L4 larvae)., Conclusions: The larvicide based on OO encapsulated in yeast was shown to be highly active (LD 50  < 50 mg/l) against all larval stages of Ae. aegypti. These results demonstrate its potential for incorporation in an integrated approach to larval source management of Ae. aegypti. This novel approach can enable development of affordable control strategies that may have significant impact on global health.

Published
2020
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3. Q2 Dependence of quadrupole strength in the gamma*p --> Delta(+)(1232) --> p pi(0) transition.

Author

Joo K, Smith LC, Burkert VD, Minehart R, Aznauryan IG, Elouadrhiri L, Stepanyan S, Adams GS, Amaryan MJ, Anciant E, Anghinolfi M, Armstrong DS, Asavapibhop B, Audit G, Auger T, Avakian H, Barrow S, Bagdasaryan H, Battaglieri M, Beard K, Bektasoglu M, Bertozzi W, Bianchi N, Biselli AS, Boiarinov S, Bonner BE, Brooks WK, Calarco JR, Capitani GP, Carman DS, Carnahan B, Cole PL, Coleman A, Cords D, Corvisiero P, Crabb D, Crannell H, Cummings J, De Sanctis E, De Vita R, Degtyarenko PV, Demirchyan RA, Denizli H, Dennis LC, Deppman A, Dharmawardane KV, Dhuga KS, Djalali C, Dodge GE, Doughty D, Dragovitsch P, Dugger M, Dytman S, Eckhause M, Efremenko YV, Egiyan H, Egiyan KS, Farhi L, Feuerbach RJ, Ficenec J, Fissum K, Forest TA, Funsten H, Gai M, Gavrilov VB, Gilad S, Gilfoyle GP, Giovanetti KL, Girard P, Griffioen KA, Guidal M, Guillo M, Gyurjyan V, Hancock D, Hardie J, Heddle D, Heisenberg J, Hersman FW, Hicks K, Hicks RS, Holtrop M, Hyde-Wright CE, Ito MM, Jenkins D, Kelley JH, Khandaker M, Kim KY, Kim W, Klein A, Klein FJ, Klusman M, Kossov M, Kuang Y, Kuhn SE, Laget JM, Lawrence D, Longhi A, Loukachine K, Lucas M, Major RW, Manak JJ, Marchand C, Matthews SK, McAleer S, McNabb JW, Mecking BA, Mestayer MD, Meyer CA, Mirazita M, Miskimen R, Muccifora V, Mueller J, Mutchler GS, Napolitano J, Niculescu G, Niczyporuk B, Niyazov RA, Ohandjanyan MS, Opper A, Patois Y, Peterson GA, Philips S, Pivnyuk N, Pocanic D, Pogorelko O, Polli E, Preedom BM, Price JW, Qin LM, Raue BA, Reolon AR, Riccardi G, Ricco G, Ripani M, Ritchie BG, Ronchetti F, Rossi P, Rowntree D, Rubin PD, Salgado CW, Sanzone M, Sapunenko V, Sargsyan M, Schumacher RA, Sharabian YG, Shaw J, Shuvalov SM, Skabelin A, Smith ES, Smith T, Sober DI, Spraker M, Stoler P, Taiuti M, Taylor S, Tedeschi D, Thompson R, Todor L, Tung TY, Vineyard MF, Vlassov A, Weller H, Weinstein LB, Welsh R, Weygand DP, Whisnant S, Witkowski M, Wolin E, Yegneswaran A, Yun J, Zhou Z, and Zhao J

Abstract

Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q2 dependence of the magnetic (M1+), electric (E1+), and scalar (S1+) multipoles in the gamma*p-->Delta(+)-->p pi(0) transition. We report new experimental values for the ratios E(1+)/M(1+) and S(1+)/M(1+) over the range Q2 = 0.4-1.8 GeV2, extracted from precision p(e,e(')p)pi(0) data using a truncated multipole expansion. Results are best described by recent unitary models in which the pion cloud plays a dominant role.

Published
2002
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4. The ep -->e'p eta reaction at and above the S11(1535) baryon resonance.

Author

Thompson R, Dytman S, Kim KY, Mueller J, Adams GS, Amaryan MJ, Anciant E, Anghinolfi M, Asavapibhop B, Auger T, Audit G, Avakian H, Barrow S, Battaglieri M, Beard K, Bektasoglu M, Bertozzi W, Bianchi N, Biselli A, Boiarinov S, Bonner BE, Briscoe WJ, Brooks W, Burkert VD, Calarco JR, Capitani G, Carman DS, Carnahan B, Cole PL, Coleman A, Connelly J, Cords D, Corvisiero P, Crabb D, Crannell H, Cummings J, Day D, Degtyarenko PV, Demirchyan RA, Dennis LC, Deppman A, De Sanctis E, De Vita R, Dhuga KS, Djalali C, Dodge GE, Doughty D, Dragovitsch P, Dugger M, Eckhause M, Efremenko YV, Egiyan H, Egiyan KS, Elouadrhiri L, Farhi L, Feuerbach RJ, Ficenec J, Fissum K, Freyberger A, Funsten H, Gai M, Gavrilov VB, Gilfoyle GP, Giovanetti K, Gilad S, Girard P, Griffioen KA, Guidal M, Guillo M, Gyurjyan V, Hancock D, Hardie J, Heddle D, Heisenberg J, Hersman FW, Hicks K, Hicks RS, Holtrop M, Hyde-Wright CE, Ito MM, Jenkins D, Joo K, Kane J, Khandaker M, Kim W, Klein A, Klein FJ, Klusman M, Kossov M, Kuhn SE, Kuang Y, Laget JM, Lawrence D, Leskin GA, Longhi A, Loukachine K, Lucas M, Magahiz R, Major RW, Manak JJ, Marchand C, Matthews SK, McAleer S, McCarthy J, McNabb JW, Mecking BA, Mestayer MD, Meyer CA, Minehart R, Mirazita M, Miskimen R, Muccifora V, Mutchler GS, Napolitano J, Niyazov RA, Ohandjanyan MS, O'Brien JT, Opper A, Patois Y, Peterson GA, Philips S, Pivnyuk N, Pocanic D, Pogorelko O, Polli E, Preedom BM, Price JW, Qin LM, Raue BA, Reolon AR, Riccardi G, Ricco G, Ripani M, Ritchie BG, Ronchetti F, Rossi P, Roudot F, Rowntree D, Rubin PD, Salgado CW, Sanzone M, Sapunenko V, Sarty A, Sargsyan M, Schumacher RA, Shafi A, Sharabian YG, Shaw J, Shuvalov SM, Skabelin A, Smith T, Smith C, Smith ES, Sober DI, Spraker M, Stepanyan S, Stoler P, Taiuti M, Taylor S, Tedeschi D, Tung TY, Vineyard MF, Vlassov A, Weller H, Weinstein LB, Welsh R, Weygand DP, Whisnant S, Witkowski M, Wolin E, Yegneswaran A, Yun J, Zhou Z, and Zhao J

Abstract

New cross sections for the reaction e p-->e p eta are reported for total center of mass energy W = 1.5--1.86 GeV and invariant momentum transfer Q2 = 0.25--1.5 (GeV/c)(2). This large kinematic range allows extraction of important new information about response functions, photocouplings, and eta N coupling strengths of baryon resonances. Newly observed structure at W approximately 1.65 GeV is shown to come from interference between S and P waves and can be interpreted with known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.

Published
2001
Full Text
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