A non-invasive photoacoustic and ultrasonic method for the measurement of glucose solution concentration

In the near-infrared region, we can test the blood glucose by non-invasive method. Based on this theory, combined photoacoustic principle, we had research about the simulated samples of blood glucose, measured the concentration of glucose solution. We have discussed the optimal wavelength in the near-infrared region (780-2400nm), and did the experiment repeatedly, and then analyzed data through the linear, polynomial and exponential fitting of the Generalized Least Squares, the measuring accuracy of the glucose solution had improved. These research results provide the guidance on the practice and experimental evidence for the further research of measuring.

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Research of Electrochemistry Measuring System Based on Saliva Glucose

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.301-303.1139 ◽

2011 ◽

Vol 301-303 ◽

pp. 1139-1144

Author(s):

Li Ying Jiang ◽

Li Jie Ren ◽

Qing Hua Chen ◽

Guang Zhao Cui

Keyword(s):

Glucose Oxidase ◽

Chemical Sensors ◽

Linear Relation ◽

Glucose Solution ◽

Solution Concentration ◽

Measuring System ◽

Cross Linking ◽

Glucose Content ◽

Relationship Of ◽

The Relationship

According to the relationship of glucose content in diabetes saliva and blood, the biosensor for detecting saliva glucose was introduced based on electrochemical detecting principle, glucose oxidase was immobilized onto the surface of electrode by glutaraldehyde cross-linking. The measuring system was designed by using potentiostat for amperometric chemical sensors. The characters of the microsystem has been demonstrated with the detection of standard glucose solution concentration of saliva parameter. Compared with the data obtained from the instrument CHI660A, it showed that has a good linear relation in the linear range of 0-2200µmol/L, with the correlation coefficient of 0.9531.

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Glucose level detection system in glucose solution using TCS3200 sensor with If-Else method

ILKOM Jurnal Ilmiah ◽

10.33096/ilkom.v13i2.733.110-116 ◽

2021 ◽

Vol 13 (2) ◽

pp. 110-116

Author(s):

Kemal Thoriq Al-Azis ◽

Alfian Ma'arif ◽

Sunardi Sunardi ◽

Fatma Nuraisyah ◽

Apik Rusdiarna Indrapraja

Keyword(s):

Glucose Level ◽

Color Change ◽

Glucose Solution ◽

Detection System ◽

The Body ◽

Glucose Levels ◽

Non Invasive ◽

Eye Health ◽

Sugar Levels

Early and routine examination of glucose levels plays an important role in preventing and controlling diabetes mellitus and maintaining the quality of life. Checking blood sugar levels by hurting the body (invasive) can lead to infections caused by needles. As an alternative, the examination is carried out in a non-invasive way using excretory fluid in the form of urine, which is reacted with Benedict's solution that create a color change. Experts in the laboratory only carry out an examination using non-invasive methods because in determining glucose levels, it requires accuracy and eye health factors. Therefore, a glucose level detection system was created using a sample of glucose solution to determine the system's parameters using the if-else method. The glucose level detection system is conducted by mixing the glucose solution with Benedict's solution to produce a color change. Then the reaction results are read by the TCS3200 sensor and processed by Arduino to be classified, according to predetermined parameters. The decision results based on the classification of the glucose level parameters that have been determined are displayed on a 16x2 LCD. The results achieved in this study on 10 samples of glucose solution that were tested and processed by the if-else method were successfully read and classified based on predetermined parameters.

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Microsphere Coupled Mach-Zehnder Interferometer for Biochemical Sensor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.284-287.2885 ◽

2013 ◽

Vol 284-287 ◽

pp. 2885-2889

Author(s):

Yun Dong Zhang ◽

Jing Zhang ◽

He Tian ◽

Ping Yuan

Keyword(s):

Glucose Solution ◽

Solution Concentration ◽

Steep Slope ◽

Frequency Range ◽

High Quality ◽

Interference Structure ◽

Biochemical Sensor ◽

Highly Sensitive ◽

Narrow Frequency Range ◽

Spectral Responses

We present the microsphere coupled Mach–Zehnder interference structure. We theoretically calculate that spectral responses of this structure vary with the glucose solution concentrations. It can produce the sharply asymmetric Fano resonance line shape related to the slope between zero and unity transmission. The variation of the normalized transmission is linearly related to the solution concentration. This structure is the promising highly sensitive biochemical sensor due to high quality factor resonance and steep slope over a very narrow frequency range

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SURFACE ROUGHNESS STUDY ON MICROCHANNELS OF CO2 LASER FABRICATING PMMA-BASED MICROFLUIDIC CHIP

Surface Review and Letters ◽

10.1142/s0218625x17500172 ◽

2017 ◽

Vol 24 (02) ◽

pp. 1750017 ◽

Cited By ~ 9

Author(s):

XUEYE CHEN ◽

TIECHUAN LI ◽

BAODING FU

Keyword(s):

Surface Roughness ◽

Laser Ablation ◽

Laser Power ◽

Sacrificial Layer ◽

Ultrasonic Method ◽

Solution Concentration ◽

Microfluidic Chips ◽

Power Laser ◽

Best Value ◽

Novel Method

A novel method named soak sacrificial layer ultrasonic method (SSLUM) has been presented for optimizing the surface roughness of the microchannels of polymethyl methacrylate (PMMA)-based microfluidic chips. CO2 laser was used for ablative microchannels on the PMMA sheet, and the effects of key parameters including laser power, laser ablation speed and solution concentration on the surface roughness of microchannels were estimated and optimized by SSLUM. The experimental observation demonstrates that the surface roughness results mainly from the residues on the channel wall, which are produced by the bubbles movement and bursting. The research results show that the surface roughness can be improved effectively by using SSLUM. In our experiment, the best value was Ra [Formula: see text] 110[Formula: see text]nm with laser power 12[Formula: see text]W, laser ablation speed 10[Formula: see text]mm/s, the solution concentration 75%, and the time of ultrasonic vibration 25[Formula: see text]min. SSLUM is proven to be an effective, simple and rapid method for optimizing the surface roughness of microchannels of microfluidic chips.

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Production and characterization of lipid microparticles produced by spray cooling encapsulating a low molar mass hydrophilic compound

Food Science and Technology ◽

10.1590/s0101-20612010005000014 ◽

2010 ◽

Vol 30 (1) ◽

pp. 276-281 ◽

Cited By ~ 12

Author(s):

Alda Jusceline Leonel ◽

Hulda Noemi Mamani Chambi ◽

Daniel Barrera-Arellano ◽

Heloise Oliveira Pastore ◽

Carlos Raimundo Ferreira Grosso

Keyword(s):

Glucose Solution ◽

Spherical Shape ◽

Average Diameter ◽

Solution Concentration ◽

Spray Cooling ◽

The Core ◽

Lipid Mixtures ◽

Continuous Surface ◽

Lipid Microparticles

The objective of this research was to produce and characterize lipid particles (MpLs) that may be used as carriers of high amounts of hydrophilic core and evaluate the influence of the core amount on the performance of lipid microparticles. The MpLs were produced by spray cooling from solid and liquid lipid mixtures (stearic and oleic fatty acids and partly hydrogenated vegetable fat) containing glucose solution as core and soy lecithin as surfactant. The performance of MpLs was evaluated by means of the effective amount of encapsulated core, the core amount present on the surface of MpLs (superficial glucose) and the core release profile in aqueous solution. Morphological observations showed that MpLs presented spherical shape and a rugged and continuous surface, and an average diameter between 25 and 32 µm. The effective amount of encapsulated core was greater than 78% for all formulations evaluated. Larger amounts of superficial glucose were found in formulations in which more concentrated glucose solutions were used, regardless of the glucose lipid-solution ratio. The release results showed that core retention was significantly influenced by the glucose solution concentration, whereas release modulation was influenced by the glucose lipid-solution ratio.

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