ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of protein secondary structure using factor analysis infrared spectraDavid C. Lee, Parvez I. Haris, Dennis Chapman, and Robert MitchellCite this: Biochemistry 1990, 29, 39, 9185–9193Publication Date (Print):October 2, 1990Publication History Published online1 May 2002Published inissue 2 October 1990https://pubs.acs.org/doi/10.1021/bi00491a012https://doi.org/10.1021/bi00491a012research-articleACS PublicationsRequest reuse...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToward the semiquantitative estimation of binding constants. Guides for peptide-peptide in aqueous solutionDudley H. Williams, Jonathan P. L. Cox, Andrew J. Doig, Mark Gardner, Ute Gerhard, Perry T. Kaye, Allick R. Lal, Ian A. Nicholls, Colin Salter, and Robert C. MitchellCite this: Am. Chem. Soc. 1991, 113, 18, 7020–7030Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published inissue 1 August...

Vibrational excitation of the primary products photo-dissociation is discussed in terms equilibrium geometry excited state parent molecule. Approximate SCF molecular orbital calculations have been used to estimate this, and results agree well with experiment. halomethyl radicals, produced through bromides greatly enhances their reactivity towards H-atom abstraction. New experimental data for ·CH2Cl radicals are presented discussed.

Abstract Several algorithms that use hydrogen bond descriptors have been published for the permeation of compounds from aqueous solution through human stratum corneum. In present work, all skin permeability coefficients, Kp in cm s−, used these non-steroids correlated Abraham equation to give a new algorithm: where n is number solutes, r correlation coefficient, s.d. standard deviation, and F F-statistic. The solute are: R2 an excess molar refraction, dipolarity/polarizability, overall or...

Supernova 1987A remains the most well studied supernova to date. Observations produced excellent broadband photometric and spectroscopic coverage over a wide wavelength range at all epochs. We model observed spectra from day 1 81 using hydrodynamical model. show that good agreement can be obtained times up about 60 days if we allow for extended nickel mixing. Later than Balmer lines become stronger our models reproduce. this is likely due more complicated distribution of gamma rays in...

A new system of absorption bands near 3600 Å has been observed during the flash photolysis CF 3 NCF 2 and is ascribed to free F CN radical. The rotational analysis 0–0 band leads ground state molecular structure r = 1.310 (assumed), 1.265 ± 0.02 Å, FCF angle 113.5 + 1°. are shown be type arising from transition 1 ← B , spectrum compared with those iso-electronic molecules NO BO.

Supernova 1987A remains the most well observed and studied supernova to date. Observations have produced excellent broadband photometric spectroscopic coverage over a wide wavelength range at all epochs. Here we focus on very early observations. Only recently numerical models been of sufficient detail accurately explain spectra. In SN 1987A, good agreement has found between synthetic spectra for day 1, but by 4, predicted Balmer lines become much weaker than lines. We present results work...

The U.S. Army continues to evaluate capabilities associated with the Future of Vertical Lift (FVL) program—a futures program (with a time horizon 15 years and beyond) intended replace current helicopter fleet. As part FVL study, we investigated required for future aeromedical evacuation platforms. This study presents two significant capability findings platform one doctrinal finding medical planning brigade operations. three results follow: (1) Given simplifying assumptions constraints...

The i.r. spectra of N-methyl-N′-[4-(5-methylimidazol-4-yl)butyl]thiourea (methylburimamide), N-(4-imidazol-4-ylbutyl)-N′-methylthiourea (burimamide), N-methyl-N′-{2-[(5-methylimidazol-4-yl)methylthio]ethyl}thiourea (metamide), N-{2-[(imidazol-4-yl)methylthio]ethyl}-N′-methylthiourea (thiaburimamide), and N-cyano-N′-methyl-N″-[2-(4-methyl-5-imidazolylmethyl)thieothyl]guanidine (cimetidine) in bromoform have been recorded the 3 500–3 200 cm–1 region compared with those some closely related...

The temperature shift of ruby laser emission has been measured interferometrically for temperatures between 66° and 210°K. Representative values the coefficient are 0.004 Å/K° at 66°K, 0.014 100°K, 0.046 200°K. These results in excellent agreement with calculations by McCumber Sturge which were based on Raman scattering Debye-model phonons. experimental technique measuring wavelength shifts is described detail, compared earlier measurements dependence R1 absorption emission.

The occurrence of the elementary reaction O(23P)+ C2F4→ CF2O + CF2 has been verified through flash photolysis NO2–C2F4 mixtures. A new class type CF2= CXY [graphic omitted] discovered; when X, Y = halogen, biradical intermediate leading to step (b) is formed preferentially. transient production halogenocarbene inferred from results in presence oxygen.

The crystal and molecular structures of the title compounds have been determined from three-dimensional X-ray diffractometer data by direct methods. Metiamide (Ia) is monoclinic, P21/n(b unique), Z= 4, a= 10.229 ± 0.008, b= 19.045 0.009, c= 6.701 0.003 Å, β= 107.76°± 0.004. Thiaburimamide (Ic) also space goup P21/c(b unique)Z= 9.981 0.003, 5.928 20.396 0.007 105.36 0.02°. Data were refined least-squares to R= 4.4% in both cases (2 226 2 903 independent reflections). Both molecules are...

This study illustrates a new approach to conducting capabilities-based analysis by assessing the requirements and capabilities of Army aeromedical evacuation units. We conducted DOTMLPF (doctrine, organization, training, maintenance, leadership, personnel, facilities) assessment determine gaps in current force structure solutions for future design. Specifically, this tackles following research questions. RQ1: What are medical mission execution operations involving geographically dispersed...