Screening for oral mucosal diseases by a portable spectrophotometer: Comparison between color difference and epithelial thickness

Takamoto, Aiko; Sugahara, Kazuyuki; Shibahara, Takahiko; Katakura, Akira; Matsuzaka, Kenichi; Sugihara, Naoki

doi:10.1016/j.ajoms.2012.10.007

Cited by 2 publications

(5 citation statements)

References 26 publications

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“…Researchers have done a great amount of work figuring out its performance and possible applications. Optical spectroscopy sensing systems are capable to improve the efficiency and ease the work in agriculture [5], food processing [6] and biomedical [7][8][9]. Recently, spectroscopy, which is followed the principal of optical techniques has been increasingly used in agricultural and food industries.…”

Section: Introductionmentioning

confidence: 99%

“…In food processing, spectroscopy can be used to detect defects in certain food products such as milk product. Soil macronutrients, N, P and K are important nutrients in agriculture for plant growth and health [1][2][3][4][5][6][7][8][9]. NPK fertilizer is the most common fertilizer available in the market.…”

Section: Introductionmentioning

confidence: 99%

“…For increasing crop production, soil testing is highly required for recommending the type of fertilizer and its quantity to be added to the soil. This testing would also help farmer to determine the quantity and the exact location to apply the fertilizers by measuring the concentrations of soil nutrients, especially N, P and K [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A low cost spectroscopy with Raspberry Pi for soil macronutrient monitoring

Isaak¹,

Yusof²,

Ngajikin³

et al. 2019

TELKOMNIKA

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Soil spectroscopy measurement is widely used to determine the macronutrients content in the soil. Spectrometer is costly equipment and commonly used to determine the transmittance, absorbance or reflectance level of various liquids and opaque solids by measuring the intensity of light as a light source passes through a sample chemical substance. This paper is reported on a low cost experimental assessment of soil macronutrient for soil spectroscopy utilizing Raspberry Pi (RPI) module in visible and near-infrared (NIR) wavelength. The sensitivity measurements are mainly due to the concentration level and the intensity of light emitting diode (LED) light source. The work is focusing on the absorbance spectroscopy particularly on linear relationship to determine the Nitrogen (N), Phosphorus (P) and Potassium (K) content level in soil using colour-developing reagent. The development of low cost and portable RPI based spectrophotometer has created new possibilities to measure the concentration level of the existed soil macronutrient within visible and infrared light wavelength of light sources. The absorbance of light was computed based on Beer-Lambert Law. The low cost RPI based spectrometer costs 80% less than the spectrometer available in the market and is capable of recording the absorbance measurements up to 5 samples. The performance of this prototype shows that it is possible to build the spectrometer using open-source software and hardware by considering the limiting factors such as light transfer to the sample, spectral filtering and the sensitivity due to the signal-to-noise ratio.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A low cost spectroscopy with Raspberry Pi for soil macronutrient monitoring

Isaak¹,

Yusof²,

Ngajikin³

et al. 2019

TELKOMNIKA

View full text Add to dashboard Cite

show abstract

“…It is most important to perform a screening test on any patient at risk for microalbuminuria in whom knowledge of the test will provide information on cardiovascular and renal risk stratification or have therapeutic implications. Confirmation of the presence of microalbuminuria is useful because some conditions cause transient excess albumin in the urine, which is neither a sign of CV nor a reason to treat microalbuminuria [4].…”

Section: Introductionmentioning

confidence: 99%

“…There are multiples method that has been widely used in biomedical field to diagnose microalbumin in human's unrine, such as dipstick and spectrophotometer [4]. Dipstick method uses a strip of 10 different reagents that will react with the urine sample and indicate a positive result with colour changing.…”

Section: Introductionmentioning

confidence: 99%

A Flexible Optical Sensor for Microalbuminuria Spectroscopy

Isaak¹,

Yusof²,

Yusof³

et al. 2018

IJEECS

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A flexible optical sensor unit was developed for the detection of albumin level in human urine. It consists of polydimethylsiloxane thinfilm with the microscopic glass as the substrate. A gradual increase of albumin level may indicate signs of health problem such as diabetes, hypertension, and endothelial dysfunction. The experimental results showed there are a spectral shift and an increase in absorbed light increase in intensity of light with sodium urate at different concentration as a substitute of urine sample. The transmittance and reflection of PDMS was determined in the 400–1400 nm wavelength range using halogen-detrium as the excitation light source to predict the sensor sensitivity based on the Beer–Lambert law. The results exhibited that the light intensity increases as the concentration of the sodium urate increases. This performance of prototype sensor ignites an alternative for albumin detection using flexible structure.

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Screening for oral mucosal diseases by a portable spectrophotometer: Comparison between color difference and epithelial thickness

Cited by 2 publications

References 26 publications

A low cost spectroscopy with Raspberry Pi for soil macronutrient monitoring

A low cost spectroscopy with Raspberry Pi for soil macronutrient monitoring

A Flexible Optical Sensor for Microalbuminuria Spectroscopy

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