000			02716nam a22003377a 4500
003			OSt
005			20250714092042.0
008			250714b |||||||| |||| 00| 0 eng d
040			_aTUPM _bEnglish _cTUPM _dTUPM _erda
050			_aBTH TK 146 _bA53 2025
100			_aAnda, Ariel Jr. M. _eauthor
245			_aPlusma: _bmodular dielectric barrier discharge (dbd) cold plasma sterilization device for inactivating escherichia coli on tomatoes and strawberries/ _cAriel Jr. M. Anda, Jea B. Gorpio, John Albert L. Mariano, John Rhey T. Ugates, Rose Angeline L. Venturero, and Rigel R. Villaroman.--
260			_aManila: _bTechnological University of the Philippines, _c2025.
300			_aii, 133pages: _c29cm.
336			_2rdacontent
337			_2rdamedia
338			_2rdacarrier
500			_aBachelor's thesis
502			_aCollege Of Engineering.-- _bBachelor of science in electronics engineering: _cTechnological University of the Philippines, _d2025.
504			_aIncludes bibliographic references and index.
520			_aContaminated food causes health problems. E. coli in food points to a need for better ways to sterilize. A study describes the PlusMA Cold Plasma Sterilization Device. This device uses a pulsed, high voltage plasma at 60 kilovolts DC and 50 kilohertz - it cleans E. coli from tomatoes and strawberries. Researchers bought the fruit at public markets. The device uses a Dielectric Barrier Discharge setup. Gold-plated copper electrodes are in the device. An FR4 barrier separates the electrodes. The device creates reactive particles in the air - these particles inactivate microbes without heat or chemicals. The test results showed a large drop in Colony Forming Units. Tomatoes decreased from 4,600 to 2,600 CFU per gram in four minutes. Strawberries went from 260,000 to 57,000 CFU per gram in seven minutes. Statistical analyses, including t-tests (p < 0.001) and ANOVA (F = 11.898, p = 0.008), confirmed the treatment’s effectiveness. Log-linear regression indicated a D-value of approximately 11 minutes, demonstrating a time-dependent reduction in microbial load. These findings show that cold plasma treatment effectively reduces contamination without heat or chemicals, offering a promising method for preserving the safety, physical integrity, and nutritional quality of fresh produce.
650			_aContaminated produce
650			_aCopper electrodes
650			_aFR4 insulator
700			_aGorpio, Jea B. _eauthor
700			_aMariano, John Albert L. _eauthor
700			_aUgates, John Rhey T. _eauthor
700			_aVenturero, Rose Angeline L. _eauthor
700			_aVillaroman, Rigel R. _eauthor
942			_2lcc _cBTH COE _n0
999			_c30314 _d30314