scholarly journals Papers read to the Society, February 17, 1898

1898 ◽  
Vol 62 (379-387) ◽  
pp. 385-385
Keyword(s):  
Chemical Composition ◽  
Electrical Properties ◽  
Mathematical Theory ◽  
Cephalic Index ◽  
Theory Of Evolution ◽  
Colour Blindness ◽  
Elasmobranch Fishes

I. “On the Connection between the Electrical Properties and the Chemical Composition of different kinds of Glass.” By Professor Andrew Gray, LL.D., F. R. S., and Professor J. J. Bobbie, M.A., D.Sc. II. “On the Magnetic Deformation of Nickel.” By E. Taylor Jones, D.Sc. Communicated by Professor Andrew Gray, F. R. S. III. “Upon the Structure and Development of the Enamel of Elasmobranch Fishes.” By Charles S. Tomes, M.A., F. R. S. V. “On artificial temporary Colour-blindness, with an Examination of the Colour Sensations of 109 Persons.” By George J. Burch, M.A. Communicated by Professor Gotch, F. R. S. V. “Contributions to the Mathematical Theory of Evolution. On the Inheritance of the Cephalic Index.” By Cicely Fawcett and Karl Pearson, F. R. S.

scholarly journals II.—A mathematical theory of evolution, based on the conclusions of Dr. J. C. Willis, F. R. S

1925 ◽  
Vol 213 (402-410) ◽  
pp. 21-87 ◽  
Keyword(s):  
Mathematical Theory ◽  
Small Areas ◽  
Theory Of Evolution ◽  
Precise Formulation ◽  
Statistical Studies

The following work is founded on that conception of evolution, the most recent and precise formulation of which is due to Dr. J. C. Willis, and represents an attempt to develop the quantitative consequences of the conception. By his statistical studies of distribution Dr. Willis was led to two conclusions:— (1) Species occupying large areas are, on the whole , older than those occupying small areas, provided that allied forms are compared.

Thermal Acclimation of a Central Neurone in Helix Aspersa: III. Ionic Substitution and Related Studies

1979 ◽  
Vol 78 (1) ◽  
pp. 201-211
Author(s):  
C. K. LANGLEY
Keyword(s):  
Chemical Composition ◽  
Electrical Properties ◽  
Membrane Resistance ◽  
Thermal Acclimation ◽  
Neuronal Membrane ◽  
Electrical Characteristics ◽  
Ionic Substitution ◽  
Warm Acclimation ◽  
Sodium And Potassium ◽  
Made In

(1) Thermal acclimation of the Fi neurone does not appear to result from changes in the chemical composition of the haemolymph. This is deduced from the lack of effect on the electrical characteristics of control neurones of either pooled haemolymph from acclimated individuals, or variations in the experimental salines made in accordance with haemolymph analyses. (2) Changes in [Ca]0 tended to act cooperatively with temperature shifts to induce alterations in the electrical properties of the neurone, notably to increase excitability and lower membrane resistance. (3) Warm acclimation was associated with increased resting conductance of the neuronal membrane to sodium and potassium, whereas chloride conductance appeared little affected.

scholarly journals IV. Contributions to the mathematical theory of evolution. III. Regression, heredity, and panmixia

1896 ◽  
Vol 59 (353-358) ◽  
pp. 69-71 ◽  
Keyword(s):  
Mathematical Theory ◽  
Quantitative Measurement ◽  
Correlation Coefficients ◽  
Regression Coefficients ◽  
Wide Field ◽  
Theory Of Evolution ◽  
Standard Deviations ◽  
Physiological Theory

The object of this paper is to develop the methods and generalise the conclusions of Mr. Francis Gallon’s work on ‘Natural Inheritance.’ It endeavours to show the wide field which a purely statistical (as distinguished from a mechanical or physiological) theory of heredity may be made to cover. In order to do this it is needful to define certain biological terms in such a manner that they are capable of quantitative measurement, the symbols in terms of which they are expressed being the standard-deviations, correlation-coefficients, and regression-coefficients already well known from the labours of Mr. Galton.

STUDYING MULTILAYERED GRAPHENES BY ELECTROPHYSICAL METHODS

2021 ◽  
pp. 100-107
Author(s):  
K. L. Levine ◽  
D. V. Ryabokon ◽  
S. D. Khanin ◽  
R. V. Gelamo ◽  
N. A. Nikonorova
Keyword(s):  
Electrical Conductivity ◽  
Chemical Composition ◽  
Electrical Properties ◽  
Work Function ◽  
Electron Work Function ◽  
Charge Storage ◽  
High Electrical Conductivity ◽  
Free Standing ◽  
Storage Devices

The paper studies multilayer graphenes in the form of free-standing films. The authors provide data about the morphology and electrical properties of films treated with plasma of various chemical composition. It is shown that it is possible to control the electrical properties of the surface and electron work function without significantly affecting its morphology. The obtained samples, combining mechanical flexibility with unreactiveness and high electrical conductivity, are promising for application in flexible charge storage devices.

Research on Aging Characteristics and Chemical Composition of Hydrogenated Transformer Oil

2012 ◽  
Vol 614-615 ◽  
pp. 1131-1137 ◽  
Author(s):  
Xu Dong Ouyang ◽  
Yi Hua Qian ◽  
Wei Su ◽  
Yi Bin Huang
Keyword(s):  
Chemical Composition ◽  
Electrical Properties ◽  
Dielectric Loss ◽  
Loss Factor ◽  
Kinematic Viscosity ◽  
Chemical Properties ◽  
Dielectric Loss Factor ◽  
Transformer Oil ◽  
Composition Variation

Under the condition of Baader aging, the chemical composition variation and the effect of transformer oil aging on electrical properties such as dielectric loss factor and physic-chemical properties such as kinematic viscosity were studied during aging. Moreover, the correlation between hydrogenated transformer oil electrical and physic-chemical properties and its chemical composition variation were investigated.

Synthesis of Cu/Cr and Cu/Cr/W Materials by Powder Metallurgy Techniques

2018 ◽  
Vol 880 ◽  
pp. 241-247
Author(s):  
Claudiu Nicolicescu ◽  
Victor Horia Nicoară ◽  
Costel Silviu Bălulescu
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Powder Metallurgy ◽  
Chemical Composition ◽  
Electrical Properties ◽  
Mechanical Alloying ◽  
Ball Mill ◽  
Weight Percent ◽  
Scanning Electron

Alloys based on Cu/Cr and Cu/Cr/W attract the attention due to their presence in different applications that require higher electrical properties which are combined with good mechanical properties. In order to synthesis the material based on Cu/Cr and Cu/Cr/W, mechanical alloying technique was used. Four mixtures, X1 (99%CuCr), X2 (97%CuCr), X3 (94%Cu1%CrW), X4 (92%Cu3%CrW – weight percent), were prepared using a vario planetary ball mill Pulverisette 4 made by Fritsch. The mixtures obtained after 10 hours were analyzed by scanning electron microscopy (SEM). It was found that the presence of chromium and tungsten influence the morphology and the particles tend to be flat. Sinter ability and microhardness are influenced by the chemical composition of the samples.

Tin as a Diffusion Barrier Between CoSi2 or PtSi and Aluminum

1982 ◽  
Vol 18 ◽  
Author(s):  
R. J. Schutz
Keyword(s):  
Chemical Composition ◽  
Electrical Properties ◽  
Schottky Barrier ◽  
Diffusion Barrier ◽  
Schottky Barrier Height ◽  
X Ray Diffraction ◽  
X Ray ◽  
Effective Barrier ◽  
Glancing Angle ◽  
Typical Temperature

The effectiveness of a thin (360Å) layer of reactively sputtered TiN as a diffusion barrier between aluminum and two silicides (PtSi and CoSi2) was evaluated. The chemical composition, structural phases and electrical properties of silicide/Al and silicide/TiN/Al contacts to n-type silicon were studied by Rutherford backscattering spectroscopy, glancing angle X-ray diffraction and Schottky barrier height measurements respectively. The results show that TiN is an effective barrier in these two systems up to at least 450°C, the typical temperature at which aluminum contacts are sintered.

ChemInform Abstract: Electrical Properties and Chemical Composition of VCr2S4.

ChemInform ◽  
2010 ◽  
Vol 27 (21) ◽  
pp. no-no
Author(s):  
MY. A. BOUTBILA ◽  
J. RASNEUR
Keyword(s):  
Chemical Composition ◽  
Electrical Properties
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