Self-Powered Wearable Sweat-Lactate Analyzer for Scheduling Training of Boat Race

2020 ◽  
Vol 15 (2) ◽  
pp. 212-218 ◽  
Author(s):  
Yupeng Mao ◽  
Ning Ba ◽  
Xinchao Gao ◽  
Ziqi Wang ◽  
Mailun Shen ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Piezoelectric Effect ◽  
Physiological State ◽  
Enzymatic Reaction ◽  
Driving Frequency ◽  
Lactate Oxidase ◽  
Training Plan ◽  
Self Powered ◽  
The Relationship ◽  
Sweat Lactate

Self-powered wearable sweat-lactate analyzer has been developed for training analysis of rowing. Tetrapodshaped ZnO nanowires are attached onto ordinary textiles to form a device. Based on the coupling of enzymatic reaction (lactate oxidase and lactic acid) and piezoelectric effect, the device can be attached to the tester to monitor the driving frequency, rowing distance and sweat lactic acid concentration of the tester in real-time. The relationship between the rowing frequency and physiological state is obtained by monitoring the rowing process of the tester, which is helpful to formulate a training plan belonging to the rowing tester. This study provides a new direction for the scientific monitoring of kinematics and accelerates the development of wearable sports equipment.

scholarly journals Wearable Battery-Free Perspiration Analyzing Sites Based on Sweat Flowing on ZnO Nanoarrays

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Wanglinhan Zhang ◽  
Hongye Guan ◽  
Tianyan Zhong ◽  
Tianming Zhao ◽  
Lili Xing ◽  
...  
Keyword(s):  
Enzymatic Reaction ◽  
Lactate Concentration ◽  
Electrical Signal ◽  
Physiological Status ◽  
Zno Nanowire ◽  
Lactate Oxidase ◽  
Capillary Action ◽  
Wireless Transmitter ◽  
Flow Channels ◽  
Self Powered

AbstractWe fabricated wearable perspiration analyzing sites for actively monitoring physiological status during exercises without any batteries or other power supply. The device mainly consists of ZnO nanowire (NW) arrays and flexible polydimethylsiloxane substrate. Sweat on the skin can flow into the flow channels of the device through capillary action and flow along the channels to ZnO NWs. The sweat flowing on the NWs (with lactate oxidase modification) can output a DC electrical signal, and the outputting voltage is dependent on the lactate concentration in the sweat as the biosensing signal. ZnO NWs generate electric double layer (EDL) in sweat, which causes a potential difference between the upper and lower ends (hydrovoltaic effect). The product of the enzymatic reaction can adjust the EDL and influence the output. This device can be integrated with wireless transmitter and may have potential application in constructing sports big data. This work promotes the development of next generation of biosensors and expands the scope of self-powered physiological monitoring system.

scholarly journals Self-Powered Piezoelectric-Biosensing Textiles for the Physiological Monitoring and Time-Motion Analysis of Individual Sports

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3310 ◽  
Author(s):  
Yupeng Mao ◽  
Mailun Shen ◽  
Bing Liu ◽  
Lili Xing ◽  
Song Chen ◽  
...  
Keyword(s):  
Motion Analysis ◽  
Physiological State ◽  
Enzymatic Reaction ◽  
Lactate Concentration ◽  
Physiological Monitoring ◽  
Material System ◽  
Analysis Process ◽  
Time Motion ◽  
Self Powered ◽  
Individual Sports

Self-powered piezoelectric-biosensing textiles for the physiological monitoring and time-motion analysis of individual sports have been developed. The material system is composed of tetrapod-shaped ZnO nanowires on common textiles. The mechanism is based on the coupling of enzymatic reaction (LOx and lactate) and piezoelectric effect. After conformably attaching the device to the athlete, the device can monitor in real-time the moving speed, frequency, joint angle, and sweat lactate concentration of the athlete. The whole monitoring/analysis process is battery-free. The motor skills and physiological state of two athletes are investigated using the textiles, and different lactate threshold times and maximum lactate release capacities have been obtained. This technique can help them develop distinct training programs. This research is a new direction for the scientific monitoring of kinematics and may also stimulate the development of self-powered wearable sports-related systems.

TO STUDY THE DYNAMICS OF IMMUNITY IN BLACK-AND-WHITE COWS DEPENDING ON AGE

2020 ◽  
pp. 49-52
Author(s):  
М.В. ДОВЫДЕНКОВА
Keyword(s):  
Bactericidal Activity ◽  
Phagocytic Activity ◽  
Physiological State ◽  
Age Groups ◽  
Statistical Processing ◽  
Natural Resistance ◽  
Black And White ◽  
Feeding Methods ◽  
High Degree ◽  
The Relationship

Проведена статистическая обработка сформированной базы данных показателей неспецифической резистентности MS «Excel» с целью изучения динамики иммунитета по параметрам бактерицидной, лизоцимной и фагоцитарной активности у крупного рогатого скота черно-пестрой породы разных возрастов. Было установлено, что средние значения показателей лизоцимной и бактерицидной активности у телят в 6 мес были ниже (47,89% и 49,09%, соответственно), чем у животных в 3—4 года (53,75% и 52,81%). Выведено уравнение регрессии, описывающее взаимосвязь между средними показателями фагоцитарной активности и возрастом при высокой степени достоверности (R2=0,90). Изменения лизоцимной и бактерицидной активности в зависимости от возраста были недостоверными (R2=0,58 и R2=0,49, соответственно). Установлена высокая корреляция между бактерицидной и лизоцимной активностью. Отмечена динамика изменения неспецифического иммунитета у коров различных возрастных групп. Создание баз данных и постоянный мониторинг основных показателей естественной резистентности в зависимости от различных факторов (породы, возраста, стадий лактации, кормления, способов содержания), которые влияют на данные показатели, необходимо для оценки физиологического состояния организма животных и их устойчивости к болезням. Statistical processing of the generated MS "Excel" on indicators of non-specific resistance database was carried out with the aim of studying the dynamics of the development of immunity in terms of bactericidal, lysozyme and phagocytic activity in black-and-white cattle of different ages. It was found that the average values of indicators of lysozyme and bactericidal activity in calves at 6 months were lower (47.89% and 49.09%, respectively) than in animals at the age of 3—4 years (53.75% and 52.81%). The equation of regression was derived, it describes the relationship between the average indicators of phagocytic activity and the age with a high degree of reliability (R2=0.90). The changes in lysozyme and bactericidal activity depending on age were dubious (R2=0.58 and R2=0.49, respectively). The high correlation between bactericidal and lysozyme activity was established. It was noticed that the cows of different age groups experienced the dynamics of changes in nonspecific immunity. The creation of databases and constant monitoring of the main indicators of natural resistance, depending on various factors (breed, age, stages of lactation, feeding, methods of keeping) that affect these indicators, is necessary for assessing the physiological state of the animals’ body of and their resistance to diseases.

scholarly journals Colonic Volume Changes in Paediatric Constipation Compared to Normal Values Measured Using MRI

Diagnostics ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 974
Author(s):  
Hayfa Sharif ◽  
Caroline L. Hoad ◽  
Nichola Abrehart ◽  
Penny A. Gowland ◽  
Robin C. Spiller ◽  
...  
Keyword(s):  
Linear Regression ◽  
Physiological State ◽  
Functional Constipation ◽  
Initial Study ◽  
Healthy Controls ◽  
Volume Changes ◽  
Additional Information ◽  
Symptom Reports ◽  
Magnetic Resonance Imaging Mri ◽  
The Relationship

Background: Functional constipation in children is common. Management of this condition can be challenging and is often based on symptom reports. Increased, objective knowledge of colonic volume changes in constipation compared to health could provide additional information. However, very little data on paediatric colonic volume is available except from methods that are invasive or require unphysiological colonic preparations. Objectives: (1) To measure volumes of the undisturbed colon in children with functional constipation (FC) using magnetic resonance imaging (MRI) and provide initial normal range values for healthy controls, and (2) to investigate possible correlation of colonic volume with whole gut transit time (WGTT). Methods: Total and regional (ascending, transverse, descending, sigmoid, and rectum) colon volumes were measured from MRI images of 35 participants aged 7–18 years (16 with FC and 19 healthy controls), and corrected for body surface area. Linear regression was used to explore the relationship between total colon volume and WGTT. Results: Total colonic volume was significantly higher, with a median (interquartile range) of 309 mL (243–384 mL) for the FC group than for the healthy controls of 227 mL (180–263 mL). The largest increase between patients and controls was in the sigmoid colon–rectum region. In a linear regression model, there was a positive significant correlation between total colonic volume and WGTT (R = 0.56, p = 0.0005). Conclusions: This initial study shows increased volumes of the colon in children with FC, in a physiological state, without use of any bowel preparation. Increased knowledge of colonic morphology may improve understanding of FC in this age group and help to direct treatment.

Self-Efficacy Sources, Reading Self-Efficacy, Metacognitive Reading Strategies and Reading Comprehension Performance: A Correlational Study in Saudi EFL Context

2021 ◽  
Vol 7 (2) ◽  
pp. 19-35
Author(s):  
Muhammad Waleed Shehzad ◽  
Ishtiaq Hussain ◽  
Amer Akhtar ◽  
Saadia Fatima
Keyword(s):  
Reading Comprehension ◽  
Self Efficacy ◽  
Reading Strategies ◽  
Structural Equation ◽  
Physiological State ◽  
Positive Association ◽  
Efficacy Beliefs ◽  
Correlational Design ◽  
Metacognitive Reading Strategies ◽  
The Relationship

Abstract The intended aim of this research was to identify the connection of Self-Efficacy Sources (SES) and Metacognitive Reading Strategies (MCRS) with Reading Comprehension (RC) by deploying reading Self-Efficacy Beliefs (SEB) as a mediating construct. A correlational design was utilized. Proportionate stratified random sampling was deployed to select a sample of 383 Saudi EFL university learners. Questionnaires and a reading comprehension test were employed to gather the data. Structural equation modelling was used to test the relationships. Results indicated that SES were substantially associated with SEB except physiological state. Moreover, all the three MCRS showed significant and positive association with SEB. Also, SEB were substantially associated with RC. Regarding mediation, it was discovered that SEB mediated the relationship among SES and RC except one source, i.e., physiological state. Moreover, SEB mediated the association between all the three MCRS and RC. This study provides several implications for learners, teachers, and policymakers. Keywords: Metacognitive Reading Strategies, Self-efficacy Sources, Reading Self-efficacy Beliefs, Reading Comprehension, Saudi EFL Learners

scholarly journals The relationship between sugar in blood and lactic acid in brain

1932 ◽  
Vol 26 (2) ◽  
pp. 381-387 ◽  
Author(s):  
Eric Gordon Holmes ◽  
Mohamed Abdel Fattah Sherif
Keyword(s):  
Lactic Acid ◽  
The Relationship

scholarly journals Computer Digital Technology-Based Educational Platform for Protection and Activation Design of Ming Furniture

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Zhe Peng ◽  
Yichen Du
Keyword(s):  
Production Management ◽  
Educational Software ◽  
Training Design ◽  
Data Simulation ◽  
Technical Management ◽  
Design Program ◽  
Training Plan ◽  
The World ◽  
Operation Platform ◽  
The Relationship

Chinese Ming-style furniture is the first of the three major furnitures in the world, which has high artistic value and complete structural system. The protection of Ming-style furniture and making its design show vitality that has always been a research topic in China and even in the world. Based on 3D virtual simulation technology, this paper uses 3D scanning reverse data acquisition technology and intelligent operation of computer engine to realize big data simulation and develops the design software of Ming furniture. By means of computer information technology, we interpret and present the structural thinking and design concept of Ming furniture and transform it into design program software. This has formed a system-wide educational software operation platform for knowledge reserve, thinking training, design and application, and achievement transformation. By applying the mechanism strategy of production and teaching to the talent training plan of colleges and universities, the underlying logic of talent training, technical management, and production management that can open up the innovative industry of Ming furniture is also constructed. After experimenting with the platform software, students are able to understand the relationship between the structure and form of Ming furniture and can design new styles that fit the logic of Ming furniture shapes as they prefer.

Experimental Study of Thermoelectric Generators

2014 ◽  
Vol 663 ◽  
pp. 299-303 ◽  
Author(s):  
Ubaidillah ◽  
Suyitno ◽  
Imam Ali ◽  
Eko Prasetya Budiana ◽  
Wibawa Endra Juwana
Keyword(s):  
Output Voltage ◽  
Thermoelectric Generator ◽  
Electrical Energy ◽  
Thermoelectric Generators ◽  
Data Logger ◽  
Computer Data ◽  
Standard Module ◽  
Self Powered ◽  
Resistive Loads ◽  
The Relationship

Thermoelectric generator is solid-state device which convert temperature difference, ∆T into electrical energy based on Seebeck effect phenomenon. The device has been widely used in self-powered system applications. This paper focuses on presentation of methodology for characterizing thermoelectric generators. The measurement of its behavior is performed by varying load resistances. A standard module of thermoelectric generator (TEC1-12710) is used in examination and an instrument setup consists of controllable heat source, controllable cooler, personal computer, data logger MCC DAQ USB-1208LS equipped with two sets of K-type thermocouples. The experiment is performed by measuring output voltage and output current in 4 values of temperature gradient by applying 10 values of resistive loads connected to the thermoelectric output wires. The common parameters studied in this research are output voltage, current and power. Generally, the relationship between parameters agrees with the basic theory and the procedure can be adopted for characterizing other type of thermoelectric generator.

Relationship Between Water Activity, Salts of Lactic Acid, and Growth of Listeria monocytogenes in a Meat Model System

1992 ◽  
Vol 55 (8) ◽  
pp. 574-578 ◽  
Author(s):  
NING CHEN ◽  
LEORA A. SHELEF
Keyword(s):  
Lactic Acid ◽  
Listeria Monocytogenes ◽  
Moisture Content ◽  
Water Activity ◽  
Sodium Lactate ◽  
Model System ◽  
Cell Numbers ◽  
Maximum Cell ◽  
The Relationship ◽  
Control Samples

The relationship between water activity (aw), lactate, and growth of Listeria monocytogenes strain Scott A was studied in a meat model system consisting of cooked strained beef ranging in moisture content from 25 to 85% (wt/wt). Lactate (4%) depressed meat aw, and differences between aw values in control and lactate-treated samples at each moisture level increased progressively with decrease in moisture, from 0.003 (85% moisture) to 0.046 (25% moisture). Maximum cell numbers per g in control samples stored at 20°C for 7 d were about 109 (45–85% moisture, aw= 0.981–0.994) and 107 (35% moisture, aw = 0.965); there was no growth in meat with 25% moisture (aw = 0.932). Sodium lactate (4%) suppressed listerial growth at >55% and inhibited growth in samples with 25–55% moisture (a < 0.964). Lactate concentrations less than 4% were not listeristatic, but combinations of 2 or 3% lactate with 2% NaCl in samples with 55% moisture inhibited growth. Potassium and calcium lactate were as effective as the sodium salt in suppressing growth and aw.

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