Now showing items 1-10 of 109
Characterization of gastrin amidation in the rat and porcine antrum: comparison with the pituitary
(Elsevier, 1990-04-24)
The formation of biologically active gastrin from glycine-extended processing intermediates occurs via the action of a peptide [alpha]-amidating enzyme. The observation that gastrin exists primarily as unamidated precursors ...
Synthesis of multivariable nonlinear controllers by input/output linearization
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1990-02)
This work concerns the synthesis of nonlinear controllers for multivariable nonlinear processes that make the closed-loop system linear in an input/output sense. Necessary and sufficient conditions for input/output ...
Fusion of mercury a new certified standard for differential scanning calorimetry
(Elsevier, 1990-03)
From the results of adiabatic-calorimetric measurements, mercury has been certified as a standard reference material for temperature and enthalpy of fusion for differential scanning calorimetry. The fusion temperature is ...
The sampling properties of some distance geometry algorithms applied to unconstrained polypeptide chains: A study of 1830 independently computed conformations
(Wiley Subscription Services, Inc., A Wiley Company, 1990-10)
In this paper we study the statistical geometry of ensembles of poly(L-alanine) conformations computed by several different distance geometry algorithms. Since basic theory only permits us to predict the statistical ...
Fluorescence Yield Near Edge Spectroscopy (FYNES) of benzene adsorbed in Na-Y zeolite
(Baltzer Science Publishers, Baarn/Kluwer Academic Publishers; J.C. Baltzer AG, Scientific Publishing Company ; Springer Science+Business Media, 1990-01)
Benzene adsorbed in sodium-Y zeolite has been investigated using Fluorescence Yield Near Edge Spectroscopy (FYNES). These studies demonstrate that FYNES measurements are feasible as a direct probe of the local electronic ...
A 1.8 Å resolution potential function for protein folding
(Wiley Subscription Services, Inc., A Wiley Company, 1990-08-15)
A general method is presented for constructing a potential function for approximate conformational calculations on globular proteins. The method involves solving a nonlinear program that seeks to adjust the potential's ...
Lubrication theory for n-layer thin-film flow with applications to multilayer extrusion and coating
(Elsevier, 1990)
Two-dimensional, n-layer isothermal flows of Newtonian liquids are analyzed by means of the Reynolds lubrication approximation (Phil. Trans. R. Soc. 177, 157, 1886). For algebraic simplicity, the coordinates are transformed ...
Nonlinear state feedback control of second-order nonminimum-phase nonlinear systems
(Elsevier, 1990-05)
The present work addresses the problem of synthesizing nonlinear state feedback controllers for second-order nonminimum-phase nonlinear systems. The concept of a first-order nonlinear all-pass is first introduced. A class ...
Structure of plane underexpanded air jets into water
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1990-06)
An experimental and numerical investigation of the structure of plane underexpanded turbulent air jets in water was conducted to characterize their structure and mixing properties. Measurements included void fraction ...
Thermodynamics of alkali alkanoates VII. Heat capacity and thermodynamic functions of potassium acetate from 4 to 585 K
(Elsevier, 1990-01)
The heat capacity of potassium acetate was measured by equilibrium adiabatic calorimetry from near 4 K up to 350 K and by d.s.c. from 325 K through melting (solid to isotropic liquid) to 585 K. No transition or anomaly was ...