Direct Evidence of the Spin Contraction in the Limited-Size Ferrimagnetic Organic Spin System: Determination of the Spin Densities at the Divalent Carbon and Theoretical Calculation of the Spin Contraction

1997 ◽  
Vol 306 (1) ◽  
pp. 447-454
Author(s):  
Yoshio Teki ◽  
Takamasa Kinoshita ◽  
Takeji Takui ◽  
Koichi Itoh
Keyword(s):  
Theoretical Calculation ◽  
Spin System ◽  
Direct Evidence ◽  
Limited Size ◽  
Spin Densities

The Determination of Criminal Insanity in Western Nigeria

1976 ◽  
Vol 14 (2) ◽  
pp. 219-245 ◽  
Author(s):  
Leigh Bienen
Keyword(s):  
Expert Testimony ◽  
Direct Evidence ◽  
Emotional Illness ◽  
Criminal Insanity

This article grew out of a more detailed study of all tried cases of homicide in Western Nigeria from 1966 to 1972. While reading more than I00 court transcripts and trial opinions, I was struck by what seemed an inordinately large number of accused with symptoms which westerners associate with mental or emotional illness. I was also conscious of judges being forced to apply an awkward, and at best difficult, standard for the determination of criminal insanity with sparse direct evidence and, in many cases, without the help of expert testimony.

scholarly journals The scattering of α-particles by matter

1910 ◽  
Vol 83 (565) ◽  
pp. 492-504 ◽  
Keyword(s):  
Quantitative Measurement ◽  
Direct Evidence ◽  
Zinc Sulphide ◽  
The Other ◽  
Narrow Slit ◽  
Preliminary Note ◽  
Metal Foils ◽  
Strong Source ◽  
Α Particles

In a preliminary note (‘Roy. Soc. Proc.’ A, vol. 81, p. 174, 1908) on the above subject, experiments were described which gave direct evidence of the scattering of the α -particles. In those experiments a strong source of α -radiation was placed at one end of a long exhausted tube, and the α -particles, after passing through a narrow slit, fell upon a zinc sulphide screen sealed to the other end of the tube. When the pressure inside the tube was very low, the narrow line of scintillations which marked the place of incidence of the α -particles on the screen was well defined, but when the rays on their way to the screen passed through gas or through thin metal foils the edges of this line of scintillations became indistinct. The amount of scattering could be estimated for different foils by placing them in the path of the rays and noting the distribution of the scintillations on the screen. The present investigation was undertaken with a view to obtain a quantitative measurement of the scattering by determining the most probable angle through which an α -particle of definite range is turned by passing through a given thickness of matter. The following are the chief points investigated:— (1) Determination of the amount of scattering produced in different thicknesses of the same material. (2) Comparison of the amounts of scattering produced in different materials. (3) Relation between the velocity of the α -particles and the amount of their scattering.

Determination of X-ray Elastic Constants in a Ti-14Al-21Nb Nb Alloy and a Ti-14Al-21Nb/SiC Metal Matrix Composite

1990 ◽  
Vol 34 ◽  
pp. 689-698 ◽  
Author(s):  
J. Jo ◽  
R. W. Hendricks ◽  
W. D. Brewer ◽  
Karen M. Brown
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Elastic Constant ◽  
Theoretical Calculation ◽  
Metal Matrix Composite ◽  
Elastic Constants ◽  
Metal Matrix ◽  
Intrinsic Value ◽  
X Ray

Residual stress values in a material are governed by the measurements of the atomic spacings in a specific crystallographic plane and the elastic constant for that plane. It has been reported that the value of the elastic constant depends on microstructure, preferred orientation, plastic deformation and morphology [1], Thus, the theoretical calculation of the elastic constant may deviate from the intrinsic value for a real alloy.

Determination of relaxation constants of a quadrupole spin system with many energy levels

2000 ◽  
Vol 42 (4) ◽  
pp. 653-656 ◽  
Author(s):  
I. V. Zolotarev ◽  
A. S. Kim ◽  
P. G. Neifel’d
Keyword(s):  
Spin System ◽  
Energy Levels ◽  
Quadrupole Spin

An improved double antibody radioimmunoassay for the determination of insulin in serum, plasma, and tissue incubation media

1982 ◽  
Vol 60 (10) ◽  
pp. 962-966 ◽  
Author(s):  
Marthe Dalpé-Scott ◽  
H. M. C. Heick ◽  
Nicole Bégin-Heick
Keyword(s):  
Experimental Animals ◽  
Limited Size ◽  
Double Antibody ◽  
Incubation Periods ◽  
Free Insulin ◽  
Antibody Method ◽  
Nonspecific Interactions ◽  
Insulin Radioimmunoassay ◽  
Pig Serum

We have modified the double antibody method of insulin radioimmunoassay to allow relatively short incubation periods and the use of centrifugation to separate bound from free insulin. This was achieved by altering the order of addition of reagents and by adding normal guinea-pig serum to reduce nonspecific interactions. The method allows for precise measurements in the range of 0–3.2 ng insulin. Both serum and plasma give consistent values. The technique is useful for the measurement of insulin levels in samples of limited size such as those from small experimental animals.

scholarly journals Flyrock Analysis To Reduce The Safe Radius Of The Tools In Andesite Rock Blossing In The District Margaasih, Bandung Regency, West Java Province

PROMINE ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 23-28
Author(s):  
Shilvyanora Aprilia Rande ◽  
Ardila Yulianti
Keyword(s):  
Theoretical Calculation ◽  
Trial Data ◽  
West Java ◽  
Naked Eye ◽  
Potential Sources ◽  
Actual Rock

Bandung regency known to have had to scatter material which be potential sources of revenue of them are material andesit mining sand and also .Research objectives is measuring the estimation of the distance the throw rocks due to maximum blasting , restudying in the determination of a radius of secure at blasting activities by counting the radius of safe to an instrument based on a theory that is compared with actual that had broken out and get constant k in signification fly rock according to alan b.richards and adrian j.moore to adjust to those of the rocks and stemming used .The research was done by counting the throw of maximum rock theoretically menutut alan b .Ricahrds and adrian j .Moore coupled with the observation actual fly rock in the field with the observation use video and the naked eye .Trial done by moving a radius of safe instrument less than 300 m. From the trial data, it is obtained that the maximum throw of the actual rock and the prediction with the theoretical calculation is in accordance with the recommendation of Adrian J. Moore and Alan B. Richard, so the radius to secure the tool is at least 2 times that of the actual throw. With the provision of using stemming, the safe radius for blasting is reduced to 200 m.

scholarly journals Kinetic and substrate complex characterization of RamA, a corrinoid protein reductive activase from Methanosarcina barkeri

2020 ◽  
Vol 367 (17) ◽  
Author(s):  
Katherine A Huening ◽  
Ruisheng Jiang ◽  
Joseph A Krzycki
Keyword(s):  
Direct Evidence ◽  
Atp Hydrolysis ◽  
Methanogenic Archaea ◽  
Methanosarcina Barkeri ◽  
Serine Residue ◽  
Substrate Complex ◽  
Apparent Kinetic Parameters ◽  
Kinetics Of

ABSTRACT In microbial corrinoid-dependent methyltransferase systems, adventitious Co(I)-corrinoid oxidation halts catalysis and necessitates repair by ATP-dependent reductive activases. RamA, an activase with a C-terminal ferredoxin domain with two [4Fe-4S] clusters from methanogenic archaea, has been far less studied than the bacterial activases bearing an N-terminal ferredoxin domain with one [2Fe-2S] cluster. These differences suggest RamA might prove to have other distinctive characteristics. Here, we examine RamA kinetics and the stoichiometry of the corrinoid protein:RamA complex. Like bacterial activases, K+ stimulates RamA. Potassium stimulation had been questioned due to differences in the primary structure of bacterial and methanogen activases. Unlike one bacterial activase, ATP is not inhibitory allowing the first determination of apparent kinetic parameters for any corrinoid activase. Unlike bacterial activases, a single RamA monomer complexes a single corrinoid protein monomer. Alanine replacement of a RamA serine residue corresponding to the serine of one bacterial activase which ligates the corrinoid cobalt during complex formation led to only moderate changes in the kinetics of RamA. These results reveal new differences in the two types of corrinoid activases, and provide direct evidence for the proposal that corrinoid activases act as catalytic monomers, unlike other enzymes that couple ATP hydrolysis to difficult reductions.

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