Assessing lithium nutritional status by analyzing its cumulative frequency distribution in the hair and whole blood

2019 ◽  
Vol 36 (07) ◽  
pp. 113-119
Author(s):  
Ninoslav Mimica ◽  
Juraj Prejac ◽  
Andrey A. Skalny ◽  
Andrei R. Grabeklis ◽  
Berislav Momčilović
Keyword(s):  
Nutritional Status ◽  
Frequency Distribution ◽  
Whole Blood ◽  
Cumulative Frequency ◽  
Cumulative Frequency Distribution

A Mathematical Model Depicting the Stress-Strain Diagram and the Hysteresis Loop

1959 ◽  
Vol 26 (1) ◽  
pp. 95-100
Author(s):  
I. R. Whiteman
Keyword(s):  
Mathematical Model ◽  
Hysteresis Loop ◽  
Yield Stress ◽  
Frequency Distribution ◽  
Elastic Region ◽  
Tangent Modulus ◽  
Strain Diagram ◽  
Cumulative Frequency ◽  
Cumulative Frequency Distribution ◽  
Stress Strain

Abstract A model is made up of elastoplastic elements, all of which have the same value of Young’s modulus E, but which have different values of yield stress. It is shown that the dimensionless tangent modulus graph Et/E represents the cumulative frequency distribution of those elements which are in the elastic region. From the frequency distribution, the equations for the stress-strain diagram and the hysteresis loop can be written.

scholarly journals Assessing Human Molybdenum Nutritional Status by Analyzing Frequency distribution Properties in the Hair and Whole Blood with a Median Derivatives Bioassay

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 1455-1455
Author(s):  
Berislav Momčilović ◽  
Juraj Prejac ◽  
Ninoslav Mimica
Keyword(s):  
Nutritional Status ◽  
Frequency Distribution ◽  
Whole Blood ◽  
Biological Indicator ◽  
Linear Range ◽  
Linear Segment ◽  
Cross Sectional ◽  
Funding Sources ◽  
Sigmoid Curve ◽  
Ultra Trace

Abstract Objectives Molybdenum is the essential trace element in human nutrition since it is a part of a pterin coenzyme which is essential for the activity of various oxidases. High doses of Mo are neurotoxic to the human brain. The safe adequate intake of Mo is set at 75–200 µg·g−1, but there is no available long-term biological indicator tissue to assess the Mo nutritional status. The aim of this study was to assess human Mo nutritional status with a median derivatives bioassay. Methods We analyzed frequency distribution of hair Mo (HMo) in a prospective, observational, cross sectional and exploratory epidemiological study of 1073 apparently healthy adults (339 men, M and 734 women, W) from Zagreb, CROATIA. Whole blood Mo (WBMo) was assessed in a population subsample of 143 W and 91 M. Both hair and whole blood, a long- and short-term biological indicator, respectively were analyzed for Mo with the ICP MS at the Center for Biotic Medicine, Moscow, Russia: an ISO certified bioelement (electrolytes, trace- and ultra-trace elements) analytical laboratory. Hair Mo natural frequency distribution was analyzed with the aid of median derivatives bioassay logistic sigmoid curve for men and women separately. The range of values below the linear segment of the sigmoid curve (the adequate Mo intake) was considered to reflect Mo deficiency, whereas the values above that linear range indicate Mo dietary excess. The adequate linear range may be further subdivided into marginal (subclinical), true adequate, and ample region with a 30:60:10 ratio, respectively. Results The linear segment of the hair Mo deposition was distinctly different (ng·g−1) and higher in M (34–75) than W (27–57) with the observed median ♀/♂ ratio 0.82. The marginal (subclinical) interval ranges are M 34–46.3, W 27–36). However, there were no difference in the WBMo confidence intervals between M (455–1380) and W (480–1145); the Median ♀/♂ observed ratio is 0.93. Conclusions Adequate human population Mo nutritional status may be accurately assessed by analyzing hair Mo frequency distribution with the median derivatives bioassay. Apparently, there is gender dependent delay of Mo hair saturation in the men hair. For the first time it was possible to differentiate the subclinical levels of sparsely adequate dietary Mo. Funding Sources Institute for Research and Development of Sustainable Eco Systems, 10,000 Zagreb, Croatia.

Daylight climatology in the Athens urban environment: guidance for building designers

2002 ◽  
Vol 34 (4) ◽  
pp. 297-309 ◽  
Author(s):  
HD Kambezidis ◽  
ThI Oikonomou ◽  
D Zevgolis
Keyword(s):  
Energy Saving ◽  
Urban Environment ◽  
Frequency Distribution ◽  
Cumulative Frequency ◽  
Cumulative Frequency Distribution ◽  
Architectural Practice ◽  
Potential Value

Global and diffuse horizontal illuminance data are analysed for Athens, Greece, for the period 1992-1997. It is shown in a graphical manner that horizontal illuminance (global and diffuse) is dependent upon the time of the day and the month of the year. The diagrams are categorized according to Perraudeau’s nebulosity index, which reflects the sky cover and the climate at a given area. The cumulative frequency distribution of the parameters under all-sky types are estimated and discussed. Some examples of sky-luminance distributions using appropriate software are given. The conclusions are of potential value to local architectural practice, installations of lighting, and in developing an energy-saving policy for the Athens region.

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