A NEW LOOK AT PSYCHOLOGICAL TESTING: PSYCHOLOGICAL TESTING FROM THE STANDPOINT OF A BEHAVIORIST.

DISCUSSES TEST PERFORMANCE IN TERMS OF RELATIONSHIPS TO CONTINGENT AND CONTROLLING STIMULI. IT IS SUGGESTED THAT TEST PERFORMANCE MAY BE RELATED TO THE SELECTION OF THE KINDS OF CONTINGENT STIMULI THAT MAY BE USED BY PERSONNEL WHO HAVE CONTACTS WITH THE PATIENT. A RELATIONSHIP BETWEEN TEST PERFORMANCE AND SELF-CONTROL AND CONTROL BY OTHERS IS HYPOTHESIZED. IT IS EMPHASIZED THAT THE SUGGESTED ANALYSIS IS STRICTLY AN EMPIRICAL APPROACH TO TESTING. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The Prediction of the Emissivity and Thermal Conductivity of Powder Beds

The present study attempts to understand drying characteristics of rubber wood sawdust in a tray dryer as it is the simplest and oldest of the dryers known commercially. An increase in temperature, flow rate of the heating medium, and initial moisture content was found to increase the drying rate. However, an increase in the particle diameter and bed height was found to reduce the drying rate. The increase in drying rate with temperature and moisture content was attributed to increase in the diffusion coefficient, while the increase due to the flow rate is attributed to reduction in the external mass transfer resistance during early stages of drying while the drying rate was high. An increase in bed height as well as particle size increases the diffusion path length for moisture, which contributes to the reduction in drying rate. The experimental data were modeled using Fick's diffusion equation, and the effective diffusivity coefficient was evaluated by minimizing the error between the experimental data and the prediction using the model equation. The effective diffusion coefficient was found to increase with increase in temperature, initial moisture content, and the flow rate of the heating medium, while it was found to decrease with increase in particle size. The diffusion coefficient was not found to vary with the bed height/solid loading. The effective diffusion coefficient was found to vary within 9.1 × 10^?9to 22 × 10^?9 m²/min. The standard deviation of error between the experimental data and prediction using the model, using the estimated effective diffusivity coefficient, was found to be less than 0.07 for the entire set of data, indicating the appropriateness of the model in predicting drying kinetics.     

Effect of structure and function of paraoxonase-1 (PON-1) on organophosphate pesticides metabolism

Paraoxonase-1 (PON1) is an important enzyme in various pathologies such as pesticide poisoning, diabetes,atherosclerosis, neuronal disorders, and cancer, due to its multifunctional activity since it acts on different metabolites.However, one of its main functions is the hydrolysis of organophosphate (OP) compounds from pesticides that causefatal poisoning at the level of the central nervous system (CNS). The objective of this review was to investigate whetherthe structure, genetics, and function of PON1 affect the metabolism of organophosphate pesticides or otherabnormalities. Information was selected from articles in the database PubMed–NCBI (https://www.ncbi.nlm.nih.gov/pubmed/) with a publication date between 2011 and 2019. The enzymatic activity of PON1 can be modified dependingon its chemical structure since there are different genetic polymorphisms that change PONI morphologies or the levelsof expression in the bloodstream. This leads to differences in susceptibilities to organophosphate pesticide poisoning.The results of this review reveal that phenotypic variants of PON1 have differences in affinities for OP substrates.