[논문]Effect of cold plasma treatment on the quantitative compositions of silkworm powder

Jo, You-Young; Seo, YoungWook; Lee, Young Bo; Kim, Seong-Ryul; Kweon, HaeYong

doi:10.7852/ijie.2019.38.2.25

Effect of cold plasma treatment on the quantitative compositions of silkworm powder 원문보기

International journal of industrial entomology, v.38 no.2, 2019년, pp.25 - 30

Jo, You-Young (Sericultural and Apicultural Materials Division, National Institute of Agricultural Science, RDA) , Seo, YoungWook (Postharvest Engineering Division, National Institute of Agricultural Science, RDA) , Lee, Young Bo (Technology Services Team, National Institute of Agricultural Science, RDA) , Kim, Seong-Ryul (Agricultural Exports Division, Rural Development Administration) , Kweon, HaeYong (Sericultural and Apicultural Materials Division, National Institute of Agricultural Science, RDA)

Abstract ▼ AI-Helper

Atmospheric-pressure plasma technique is a technology for sterilizing agricultural product. In this study, dielectric barrier discharge plasma was applied to silkworm powder for 1 to 5 h with less than 2 ppm of $O_3$ and $NO_2$. Quantitative compositions including proximate contents, mineral and heavy metal contents, fatty acids, vitamins, and DNJ contents were measured. Proximate contents of silkworm powder were protein (57.2%), fat (9.9%), fiber (4.6%), ash (10.1%), and moisture (5.7%). These compositions were not affected by the treatment of plasma. Silkworm powder has 5 abundant minerals potassium (K), phosphorus (P), sulfur (S), calcium (Ca), and magnesium (Mg). Among these minerals, plasma treatment decreased the contents of P and S sharply from 732.3 to 176.8, and 492.7 to 185.2 mg/100g, respectively. Heavy metal contents including lead (Pb), cadmium (Cd), arsenic (As), and mercury (Hg) were not detected in the silkworm powder. Five vitamins such as ascorbic acid (13.6 mg/100g), riboflavin (5.4 mg/100g), ${\beta}$-carotene (1.8 mg/100g), niacin (0.6 mg/100g), and thiamine (0.4 mg/100g) were not significantly changed by plasma treatment. Silkworm powder is composed of 30 parts saturated fatty acids and 70 parts unsaturated ones. The fatty acid composition was not significantly changed by plasma treatment. The DNJ content of silkworm powder (3.72 mg/g) was also nearly constant within the experimental condition of plasma treatment.

주제어

표/그림 (7)

그림 Fig. 1. Schematic diagram of silkworm powder sterilization system based on atmospheric pressure dielectric barrier discharge (DBD) cold plasma technique
표 Table 1. Proximate composition of silkworm powder treated with plasma
표 Table 2. Mineral concentration (mg/100g) of silkworm powder treated with plasma
표 Table 3. Heavy metal concentration (ppm) of silkworm powder treated with plasma
표 Table 4. Vitamins contents (mg/100g) in silkworm powder treated with plasma
표 Table 5. Fatty acid compositions of silkworm powder (% of total fatty acids)
표 Table 6. Deoxynojirimycin content in silkworm powder treated with plasma

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제안 방법

The sample was treated with DBD plasma for 0, 1, 3, and 5h. Each sample was placed inside the DBD plasma system.
6 filter paper (GEHealthcare Life Sciences, Chicago, IL, USA) with hot water. Themineral contents in the prepared samples were analyzed usingan inductively coupled plasma optical emission spectrometer PerkinElmer Optima 8300 (Perkin-Elmer Corporation, Norwalk,CT, USA) by measuring the wavelength and intensities ofspecific emitted radiant rays for each mineral.

대상 데이터

The silkworm powder (B. mori L.) was purchased fromMokGolNongJang, a sericulture farm (YeongDeock, Korea). The3-day-old 5^th instar larva were quickly frozen within the liquidnitrogen and lyophilized.

이론/모형

Proximate analysis of the silkworm powder was determined asfollows: The water content was obtained by drying the powderat 105 °C under atmospheric pressure. The amount of crudeprotein was determined by semi-micro-Kjeldahl method usingan automatic protein analyzer (Kjeltec 2400 AUT, Poss Tecator,Mulgrave, Australia). The crude lipids in the dried samples wereextracted by diethyl ether and then quantified using a Soxhletextraction system (Soxtec System HT1043 extraction unit, FossTectator, Hoganas, Sweden).

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