The study on the relationship of frequency domain spectroscopy of oil-paper insulation with degree of polymerization and tensile strength

2018 ◽  
Author(s):  
Xiaoguang Xi ◽  
Haoming Wang ◽  
Wei Wang ◽  
Yi Xiao ◽  
Qingmin Li ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Frequency Domain ◽  
Degree Of Polymerization ◽  
Paper Insulation ◽  
Relationship Of ◽  
The Relationship

Evidence Of Possible Linkage Between Von Willebrand’S Disease (VWD) And 2 Polymorphic Genetic Markers

1981 ◽  
Author(s):  
E S Barrow ◽  
H M Reisner ◽  
K K Namboodiri ◽  
R C Elston ◽  
J B Graham
Keyword(s):  
Genetic Markers ◽  
Laboratory Data ◽  
Degree Of Polymerization ◽  
Pedigree Information ◽  
Chromosome 6 ◽  
Lod Score ◽  
Laboratory Findings ◽  
Relationship Of ◽  
The Relationship ◽  
Normal Laboratory

VWD shows great variability within and between families. In some kindred the affected persons show decreased amounts of an apparently normal VIIIR:Ag. In others, abnormal electrophoretic mobility of VIIIR:Ag has been associated with a defect in the degree of polymerization. Within kindred, expressivity may be so variable that some transmitters have normal laboratory findings. Detection of linkage between VWD and a clearly defined antigenic or biochemical marker might provide the means to make unambiguous diagnoses and to distinguish between the effects of the multiple genes involved in synthesis of VIIIR:Ag.We have examined 4 VWD kindred, using 23 genetic markers. Individuals were classified for VWD using clinical and laboratory data, pedigree information and 2 statistical procedures: D I based on 3 measures of F VIII activity, and D II which also included bleeding time and a subjective index of symptoms. Using D I, a LOD score of 0.66 at a recombination frequency (θ) of 0.20 was found with GPT (glucose pyruvic transaminase). Using D II a LOD score of 0.50 at a θ of 0.25 was found. Most of the evidence of a VWD- GPT linkage was provided by a single kindred. Using D II, evidence suggesting a second linkage was observed between VWD and GLO (glyoxylase) with a LOD score of 1.03 at a 0 of 0.20, all 4 families contributing.The LOD scores reported are suggestive of linkage and warrant further study. Since GLO relates to Chromosome 6 while the chromosomal location of GPT is not known and since GPT and GLO are unlinked, VWD may be genetically heterogeneous, 2 or more loci being involved.Studies to clarify the relationship of VWD to Chromosome 6 are underway using markers known to be linked to GLO.

Is cotton-strip tensile strength a surrogate for microbial activity in groundwater?

2010 ◽  
Vol 61 (3) ◽  
pp. 351 ◽  
Author(s):  
M. J. Lategan ◽  
K. Korbel ◽  
G. C. Hose
Keyword(s):  
Tensile Strength ◽  
Microbial Activity ◽  
Strength Loss ◽  
Cellulolytic Activity ◽  
Community Interactions ◽  
The Media ◽  
Microbial Groups ◽  
Relationship Of ◽  
The Relationship ◽  
Cotton Strip

The cotton strip assay uses the loss of tensile strength of cotton strips as a measure of microbial cellulolytic activity. Its suitability for measuring general microbial activity in groundwater was tested by examining the relationship of tensile strength, abundance of cellulolytic organisms and general microbial activity on cotton strips deployed in bores. The hypothesis was that the strength of cotton strips would decline with increasing abundance and activity of cellulolytic organisms, and as cellulolysis makes resources available to other microbial groups, cotton strength loss should also be related to increased overall microbial activity. The correlation between the abundance of cellulolytic organisms and cotton strength was not significant. Two main factors influenced this relationship: (i) effectiveness of the media in detecting cellulolytic moulds and (ii) inter-community interactions. After accounting for the presence of moulds through partial correlation, the relationship between tensile strength and abundance of cellulolytic organisms was stronger and significant. Both cotton strength and abundance of cellulolytic organisms correlated significantly with general microbial activity. These results support the use of the cotton strip assay, and cotton tensile strength as a surrogate for microbial activity in groundwater.

Study on the Relationship between Soil-Cement Parameters and Unconfined Compressive Strength

2011 ◽  
Vol 255-260 ◽  
pp. 4012-4016
Author(s):  
Jun Qing Ma ◽  
You Xi Wang
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Shear Strength ◽  
Unconfined Compressive Strength ◽  
Deformation Modulus ◽  
Soil Cement ◽  
Strength And Deformation ◽  
Cement Soil ◽  
Relationship Of ◽  
The Relationship

This paper studies relationship between soil-cement parameters and unconfined compressive strength. The research in tensile strength and deformation modulus of soil-cement is an important basis for soil-cement failure mechanism and intensity theory. They also impact cracks, deformation and durability of cement-soil structure. Shear strength and deformation of soil-cement is important to the destruction analysis and finite element calculations. Therefore it needs to study on tensile strength, shear strength and deformation modulus of soil-cement. Based on previous experiments, the relationship of tensile strength, shear strength, deformation modulus and unconfined compressive strength of soil-cement are quantitatively studied.

The Direct Determination of Oxygen in Rubber. The Adaptation of the Ter Meulen Method to Rubber and Its Application to the Study of Aging

1939 ◽  
Vol 12 (2) ◽  
pp. 269-282 ◽  
Author(s):  
H. I. Cramer ◽  
I. J. Sjothun ◽  
L. E. Oneacre
Keyword(s):  
Tensile Strength ◽  
Physical Properties ◽  
Direct Determination ◽  
Sulfur Poisoning ◽  
Oxidation Products ◽  
Oxygen Bomb ◽  
Vulcanized Rubber ◽  
Relationship Of ◽  
The Relationship

Abstract The ter Meulen method for the direct determination of oxygen has been adapted, with modifications, to the analysis of raw and vulcanized rubbers. Raney nickel has been found to be quite effective as the reducing catalyst and to be satisfactorily resistant to sulfur poisoning. The method has been applied to the study of the aging of vulcanized rubber in the Geer oven and oxygen bomb. From this study the following conclusions may be drawn: (1) The increase in combined oxygen is greater in the oxygen bomb than in the Geer oven. (2) Deterioration of rubber in the oxygen bomb involves oxidation primarily, whereas that occurring in the Geer oven involves not only oxidation but also thermal decomposition followed by volatilization of oxidation products. (3) The effectiveness of an antioxidant in retarding the absorption of oxygen in oxygen-bomb aging agrees well with its ability to maintain the physical properties of the stock in which it is present. (4) The deterioration in physical properties of a rubber stock in the oxygen bomb during the early stages of aging is a linear function of the increase in combined oxygen. For stocks containing antioxidants and diphenylguanidine as the accelerator, an increase in combined oxygen of approximately 1.2% corresponds to a decrease in tensile strength of 50%. (5) The relationship of increase in combined oxygen to decrease in tensile strength seems to be affected not only by antioxidants, but also by accelerators of vulcanization.

scholarly journals Autonomic effects on the spectral analysis of heart rate variability after exercise

2009 ◽  
Vol 297 (4) ◽  
pp. H1421-H1428 ◽  
Author(s):  
Jason Ng ◽  
Sri Sundaram ◽  
Alan H. Kadish ◽  
Jeffrey J. Goldberger
Keyword(s):  
Frequency Domain ◽  
High Frequency ◽  
Frequency Domain Analysis ◽  
Mean Square ◽  
Rr Intervals ◽  
Autonomic Blockade ◽  
Frequency Components ◽  
Highly Correlated ◽  
Relationship Of ◽  
The Relationship

Although frequency-domain analysis of heart rate variability (HRV) has been performed in the setting of exercise and recovery from exercise, the relationship of specific frequency components to sympathetic and parasympathetic inputs has not been validated in this setting. The aim of this study is to evaluate the relationship of frequency components of HRV to sympathetic and parasympathetic modulation in the setting of recovery after exercise using selective autonomic blockade. Normal subjects ( n = 27, 17 men, 53 ± 7 yr old) underwent bicycle stress testing on four separate days. On day 1, a baseline study without autonomic blockade was performed. On days 2 through 4, either β-adrenergic, parasympathetic, or double blockade was administered during exercise and completed 3 min before recovery. Continuous ECG was recorded for 5 min starting from the end of exercise. Time- and frequency-domain measures of HRV were computed for each of the five 1-min segments of RR intervals. Parasympathetic blockade significantly decreased all the HRV measures compared with baseline ( P < 0.02 for all). Root mean square of successive differences of RR intervals (rMSSD) was increased by β-adrenergic blockade ( P < 0.0002). All the HRV measures except rMSSD showed increases with time after the first minute of recovery. The low frequency-to-high frequency ratio did not respond to autonomic blockade or to recovery time, consistent with the expected changes in sympathovagal influence. Root mean square (detrended SD) and rMSSD were highly correlated with the square root of the total power ( r = 0.96) and high-frequency power ( r = 0.95), respectively. Although there are marked reductions in the frequency-domain measures in recovery versus rest, the fluctuations in the low- and high-frequency bands respond to autonomic blockade in the expected fashion. Time-domain measures of HRV were highly correlated with frequency-domain measures and therefore provide a computationally more efficient assessment of autonomic influences during recovery from exercise that is less susceptible to anomalies of frequency-domain analysis.

The Relationship of Structure to Properties in Electrodeposited Films

1985 ◽  
Vol 47 ◽  
Author(s):  
Keith Sheppard ◽  
Rolf Weil
Keyword(s):  
Tensile Strength ◽  
Amorphous Materials ◽  
Scientific Basis ◽  
Internal Stresses ◽  
Structure And Properties ◽  
Chemical Additives ◽  
Modulation Techniques ◽  
Alternative Means ◽  
Relationship Of ◽  
The Relationship

ABSTRACTThe recent development of a more systematic, scientific basis for knowledge in electrodeposition technology is discussed, focussing on the influence of microstructure on deposit properties. Internal stresses, tensile strength, ductility, preferred orientation and the ability to electrodeposit amorphous materials are considered. In particular the unique influence on these properties of small quantities of chemical additives is discussed. The application of current modulation techniques during electrodeposition is described as an alternative means of controlling structure and properties.

Revisiting the Link between Consumer Sentiment and Economic Activity

2016 ◽  
pp. 16-50 ◽  
Author(s):  
Sadullah Çelik
Keyword(s):  
Frequency Domain ◽  
Economic Activity ◽  
Emerging Market ◽  
Consumer Confidence ◽  
Main Theme ◽  
The Public ◽  
Financial Variables ◽  
Leading Economic Indicators ◽  
Relationship Of ◽  
The Relationship

This chapter revisits the relationship between consumer confidence(sentiment) and economic and financial variables for the emerging market of Turkey using the recently developed and superior frequency domain causality and wavelet comovement analysis. The main theme is to assess the information content and the relationship of consumer confidence indices (which are advocated to be leading economic indicators) with important economic and financial variables in Turkey. This will help to understand the dynamics of interaction between households, firms and the public sector in Turkey. There are two basic contributions of this study to the existing literature: first, as far as we know, this study is the first of its' kind concentrating on the consumer confidence and several other financial parameters for an emerging market by adopting a frequency domain and wavelet comovement analyses. Second, the use of frequency analysis enables us to examine the test results over different frequencies rather than limiting ourselves in time domain and a linear world.

Effects of UV Irradiation on the Molecular Structure and Tensile Properties of Nucleated Polypropylene

2014 ◽  
Vol 905 ◽  
pp. 82-87 ◽  
Author(s):  
You Ji Tao ◽  
Gan Xin Jie ◽  
Xiao Dong Zhang ◽  
Li Fen Hu ◽  
Jian Peng ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Uv Irradiation ◽  
Irradiation Time ◽  
Relative Content ◽  
Carbonyl Index ◽  
Relationship Of ◽  
The Relationship ◽  
Strength Retention

A sorbitolum compound and an aryl amide compound were applied to prepare α-nucleated PP (α-PP) and β-nucleated PP (β-PP), respectively. Effects of UV irradiation on the molecular structure and tensile properties of pure PP, α-PP and β-PP were investigated. The relationship of tensile strength with carbonyl index was discussed. The change of relative content of β-modification in β-PP during photodegradation was examined by WAXD. The carbonyl index calculated from FTIR spectra arranged as α-PP > PP > β-PP, however, the tensile strength retention at the UV irradiation time of 792h arranged as PP > β-PP > α-PP. The relative content of β-crystal nearly unchanged during the photodegradation.

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