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Heart rate is one of the important indices to calculate and evaluate the intensity and quality of motion. It can scientifically and objectively reflect the intensity level of momentum and exercise in the process of exercise. It is an important index of athletic strength and physical fitness of athletes in college sports training. This paper analyzes the basic metabolic model of the human body and energy supply and demand model and constructs a scientific energy consumption test model for special sports activity. An algorithm for heart rate detection and energy consumption based on acceleration data acquisition is proposed. Therefore, it is proposed to calculate motion acceleration using bone point data obtained from a portable telephone camera sensor for special sports activity and to calculate kinetic energy consumption through detection data. A model for evaluating the proposed algorithm is also established. [ABSTRACT FROM AUTHOR]

The dark current mechanism of extended wavelength InxGa1-xAs photo-detectors is still a debated issue. In this paper, the deep-level transient spectroscopy (DLTS) and dark current characteristics of InxGa1-xAs/InP detectors are investigated. Using trap parameters obtained from DLTS measurement, the device simulations of current-voltage characteristics are carried out by Silvaco Altas. The results reveal that the dark current at the low reverse bias voltage is associated with deep level trap induced trap assisted tunneling and Shockley-Read-Hall generation mechanism. The reduction of the deep level trap concentration in InxGa1-xAs absorption layer could dramatically suppress the dark current near zero bias in extended wavelength InxGa1-xAs/InP detectors. [ABSTRACT FROM AUTHOR]

Both Fe(III)-bearing clay minerals and humic acids (HAs) are abundant in the soils and sediments. Previous studies have shown that bioreduction of structural Fe(III) in clay minerals could be accelerated by adding anthraquinone compound as a redox-active surrogate of HAs. However, a quinoid analogue could not reflect the adsorption and complexation properties of HA, and little is known about the effects of real HAs at environmental concentration on bioreduction of clay minerals. Here, it was shown that 10-200 mg l−1 of natural or artificially synthesized HAs could effectively stimulate the bioreduction rate and extent of Fe(III) in both iron-rich nontronite NAu-2 and iron-deficient montmorillonite SWy-2. After adsorption to NAu-2, electron-transfer activities of different HA fractions were compared. Additionally, Fe(II) complexation by HAs also contributed to improvement of clay-Fe(III) bioreduction. Spectrosopic and morphological analyses suggested that HA addition accelerated the transformation of NAu-2 to illite, silica and siderite after reductive dissolution. [ABSTRACT FROM AUTHOR]

Aim: Alcohol dehydrogenase-IB (ADH1B) and aldehyde dehydrogenase-2 (ALDH2) are the key enzymes for elimination of ethanol and acetaldehyde, the latter being an established animal carcinogen produced after drinking. In this study, we aimed to evaluate the contribution of ADH1B and ALDH2 polymorphisms to the risk of esophageal squamous cell (ESCC) in Chinese females., Methods: A total of 81 pathologically-proven female ESCC cases and 162 female controls were recruited from the Affiliated Hospital of Medical College of Armed Police Forces of PRC in China. ADH1B and ALDH2 polymorphisms were genotyped using PCR-CTPP., Results: Compared with those with ADH1B*2/*2, individuals with ADH2*1/*2 and ADH2*1/*1 had 1.47 and 2.36-fold, respectively, increased risk of developing ESCC (95%CI=0.84-2.58, 95%CI=1.14-5.79) after adjusting for alcohol consumption and other covariates. Significantly increased risk was also noted among subjects with ALDH2*1/*2 (adjusted OR=3.24, 95%CI=1.45-5.36), when compared to those with ALDH2*1/*1. Risk was greater in heavy drinking females carrying ADH1B *1/*1 or ALDH2*1/*2 genotypes compared to those with ADH1B*2 and ALDH2*1/*1. Moreover, we found a significant trend of ESCC risk with alcoholic consumption in women with ALDH2*1/*2., Conclusion: Chinese women with ADH1B *1/*1 or ALDH2*1/*2 have elevated risk of ESCC similarly to men. Women with inactive ADH1B and ALDH2 should reduce drinking and increase their intake of vegetable and fruit to prevent development of esophageal cancer.