A. V. Shkirin, S. N. Chirikov, N. V. Suyazov, M. E. Astashev, D. N. Ignatenko, S. V. Gudkov
{"title":"Detection of Somatic Cells in Milk Using Laser Light Scattering","authors":"A. V. Shkirin, S. N. Chirikov, N. V. Suyazov, M. E. Astashev, D. N. Ignatenko, S. V. Gudkov","doi":"10.3103/s1068335624600566","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The angular intensity distribution of 650 nm laser radiation multiply scattered by bovine milk samples of various fat content, containing large-scale particles with a size of ~20 μm, is studied in cylindrical geometry. It is shown that the forward scattering intensity measured for milk with a fat content in the range of 0–6% decreases monotonically with increasing concentration of somatic cells in the range of 5 × 10<sup>4</sup>–10<sup>6</sup> cm<sup>‒3</sup>. However, the angular dependence of the side- and backscattering intensity, used to determine the fat content in milk, practically does not change when somatic cells are added. A prototype of a milk composition sensor is assembled, based on measuring the scattering indicatrix in the angular range of 18°–162° using an axisymmetric array of photodiodes in combination with a photodetecting CMOS matrix that measures the small-angle forward light scattering intensity (near 0°).</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6000,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Lebedev Physics Institute","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.3103/s1068335624600566","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The angular intensity distribution of 650 nm laser radiation multiply scattered by bovine milk samples of various fat content, containing large-scale particles with a size of ~20 μm, is studied in cylindrical geometry. It is shown that the forward scattering intensity measured for milk with a fat content in the range of 0–6% decreases monotonically with increasing concentration of somatic cells in the range of 5 × 104–106 cm‒3. However, the angular dependence of the side- and backscattering intensity, used to determine the fat content in milk, practically does not change when somatic cells are added. A prototype of a milk composition sensor is assembled, based on measuring the scattering indicatrix in the angular range of 18°–162° using an axisymmetric array of photodiodes in combination with a photodetecting CMOS matrix that measures the small-angle forward light scattering intensity (near 0°).
期刊介绍：
Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.
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