3,710 research outputs found
Diphenylacetylene-linked peptide strands induce bidirectional β-sheet formation.
No full textIn the search for synthetic mimics of protein secondary structures relevant to the mediation of protein-protein interactions, we have synthesized a series of tetrasubstituted diphenylacetylenes that display β-sheet structures in two directions. Extensive X-ray crystallographic and NMR solution phase studies are consistent with these proteomimetics adopting sheet structures, displaying both hydrophobic and hydrophilic amino acid side chains
sj-pdf-1-ggm-10.1177_23337214211060166 – Supplemental Material for “You Feel Very Isolated”: Effects of COVID-19 Pandemic on Caregiver Social Connections
No full textSupplemental Material, sj-pdf-1-ggm-10.1177_23337214211060166 for “You Feel Very Isolated”: Effects of COVID-19 Pandemic on Caregiver Social Connections by Alycia A. Bristol, Aaron C. Mata, Melody Mickens, Kara B. Dassel, Lee Ellington, Debra Scammon, Amber Thompson, Gail L. Towsley, Rebecca L. Utz and Alexandra L. Terrill in Gerontology and Geriatric Medicine</p
β,β-directly linked porphyrin rings: synthesis, photophysical properties, and fullerene binding
No full textCyclic porphyrin oligomers have been studied as models for photosynthetic light-harvesting antenna complexes and as potential receptors for supramolecular chemistry. Here, we report the synthesis of unprecedented β,β-directly linked cyclic zinc porphyrin oligomers, the trimer (CP3) and tetramer (CP4), by Yamamoto coupling of a 2,3-dibromoporphyrin precursor. Their three-dimensional structures were confirmed by nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry, and single-crystal X-ray diffraction analyses. The minimum-energy geometries of CP3 and CP4 have propeller and saddle shapes, respectively, as calculated using density functional theory. Their different geometries result in distinct photophysical and electrochemical properties. The smaller dihedral angles between the porphyrin units in CP3, compared with CP4, result in stronger π-conjugation, splitting the ultraviolet–vis absorption bands and shifting them to longer wavelengths. Analysis of the crystallographic bond lengths indicates that the central benzene ring of the CP3 is partially aromatic [harmonic oscillator model of aromaticity (HOMA) 0.52], whereas the central cyclooctatetraene ring of the CP4 is non-aromatic (HOMA –0.02). The saddle-shaped structure of CP4 makes it a ditopic receptor for fullerenes, with affinity constants of (1.1 ± 0.4) × 105 M–1 for C70 and (2.2 ± 0.1) × 104 M–1 for C60, respectively, in toluene solution at 298 K. The formation of a 1:2 complex with C60 is confirmed by NMR titration and single-crystal X-ray diffraction
Sugarbeet harvesting efficiency
No full textBulletin no. 770 Moscow, Idaho :University of Idaho, College of Agriculture, Agriculture Experiment Station, 1994-12-01. Author(s): Withers, Russell V.; Thompson, Joseph C.; Peterson, Charles L
Concentration in Knowledge Output: A case of Economics Journals
No full textThis paper assesses the degree of author concentration in seven economics journals, which were published in India during 1990-2002. To measure the degree of author concentration, Lotka's Law was used. Moreover, we also make an exploratory analysis of the geographic, economics subfield and institutional concentration in 704 economics journals. An important finding of this paper is that specialized journals in the sample report the highest degree of author concentration. This result is quite similar to the findings by Cox and Chung (1991). Furthermore, there are several instances showing that the journals lean towards certain norms; this may affect the flow of innovative ideas into economics. We conclude that a knowledge activity, involving the high degree of concentration and a biased publication process, may affect the flow of new ideas into the discipline.Concentration, Lotka's Law
"'Traumatic Screens': l'11 settembre visto dal televisore della Sig.ra Thompson"
No full textThe paper aims to read David Forster Wallace’s essay “The View From Mrs Thompson” (appeared in the October 25, 2001 issue of Rolling Stone) through the exegetic filter of trauma theory, in order to interpret the manner the author chose to account for his own account of the horror of 9/11, which he experimented not directly, but mediated by the screen of a television in a Midwest living room, namely Mrs Thompson
Short-term alteration in voluntary feed intake after selenium supplementation in Angora goat kids
No full textThe objective of this study was to examine the effect of selenium (Se) supplementation on voluntary feed intake in Se-deficient Angora goat kids and its temporal relationship to alterations in the concentrations of thyroid hormones in plasma and the activity of glutathione peroxidase in serum. Angora goat kids were fed pelleted lucerne with a Se concentration of 20 mu g/kg of dry matter (DM) and treated orally with either Se (0.1 mg/kg of liveweight weekly, as sodium selenate) or deionised water. Supplementation with Se had no effect on DM intake measured over 21 days. Serum activity of glutathione peroxidase was increased by Day 1 of treatment (P < 0.001), plasma concentration of thyroxine was decreased by Day 21 of treatment (P < 0.01), and plasma concentration of triiodothyronine was unaffected by treatment. It is concluded that increased appetite is unlikely to be the primary mechanism involved in the response to Se supplementation in Angora goats.PT: J; CR: *SAS I INC, 1988, SAS US GUID STAT VER ARTHUR JR, 1993, AM J CLIN NUTR S, V57, P236 BUNK MJ, 1980, J NUTR, V110, P743 DONALD GE, 1993, AUST J EXP AGR ANIM, V33, P411 EWAN RC, 1976, J NUTR, V106, P702 HAFEMAN DG, 1974, J NUTR, V104, P580 HUSSEIN KSM, 1982, ACTA AGR SCAND, V23, P556 THOMPSON JN, 1969, J NUTR, V97, P335 THOMPSON KG, 1980, RES VET SCI, V28, P321 UNDERWOOD EJ, 1977, TRACE ELEMENTS HUMAN WALSH DM, 1993, INT J VITAM NUTR RES, V63, P188 WICHTEL JJ, 1995, IN PRESS J DAIRY SCI WICHTEL JJ, 1996, NEW ZEAL J AGR RES, V39, P111; NR: 13; TC: 1; J9: N Z J AGR RES; PG: 4; GA: UM341Source type: Electronic(1
Journal of International Agricultural Trade and Development, Volume 6, Issue 1
No full textTable of Contents: (1) Meyers, William H., Patrick Westhoff, Jacinto F. Fabiosa, and Dermot J. Hayes: "The FAPRI Global Modeling System and Outlook Process," pp. 1-20; (2) Meyer, Seth, Julian Binfield, and Patrick Westhoff: "Interactions between Energy Markets and Agriculture in the U.S.: A Stochastic Approach," pp. 21-40; (3) Han, Suk Ho, and Dae Seob Lee: "Impacts of the Korea-U.S. FTA: Application of the Korea Agricultural Simulation Model," pp. 41-60; (4) Strauss, P.G., and F.H.Meyer: "Combining Stochastic Modeling Techniques with Scenario Thinking for Strategic and Policy Decisions in Agriculture," pp. 61-82; (5) Hanrahan, Kevin, Trevor Donellan, and Frederic Chantreuil: "Agricultural Policy Change in the EU: Analyzing the Impact at member State and Aggregate EU Levels," pp. 83-100; (6) Moss, Joan, Myles Patton, Julian Binfield, Lichun Zhang, and In Seck Kim: "FAPRI-UK Modeling: Regional Responses to European Policy Incentives," pp. 101-116; (7) Thompson, Wyatt: "Biofuel Effects on Markets and Indirect Effects on Land Use and Food," pp. 117-132; (8) Westhoff, Patrick, and William H. Meyers: "The FAPRI Approach: A Few Key Principles." pp. 133-135.Agricultural Policy, International Trade, International Development, Agricultural and Food Policy, International Development, International Relations/Trade,
Gender and body image
No full textThat gender has a considerable impact on people’s body image may seem obvious based on the considerable attention paid to women’s and men’s bodies in popular culture (Thompson, Heinberg, Altabe, & Tantleff-Dunn, 1999; Wolf, 1991)
- …
