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안주희,V.M. Balasubramaniam 한국식품과학회 2007 Food Science and Biotechnology Vol.16 No.2
The effects of temperature heating-up rate and pressure building~up phase on the inactivation of Listeria innocua ATCC 33090 were evaluated in buffered peptone water. The number of 1. znnocua was reduced by 5.57 and 6.52 log CFUI mL during the nonisothermal treatment (the come-up time followed by isothermal process) and i?e Isothermal treatme~t, res ectivel at 60°C. When compared to the isothermal treatment (0.76<D value<0.9?), 1. znn~cua. exposed at t e no~sothe~al treatment (1.58<D value<2.31) became more resistant to heat. The come-up tune r~ductIons m numbers of 1. innocua significantly increased with increasing the heating rates (p<0.05). The pronounced ~eductI?n was observed by more than 5 log CFU/mL at 33.2°C/min of temperature heat!ng-~ate. T.he effect of the combmed high pressure and thermal processing on the inactivation of 1. innocua increased WIth mcreas~g pressure and temperature. ~t all temperature levels from 40 to 60°C under 700 MPa,1. innocua was not detected by ennchment culture (>7 log reduction).
안주희,Bala V. M. Balasubramaniam 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.6
Pressure-assisted thermal processing (PATP)inactivation kinetics of Bacillus amyloliquefaciens sporesin deionized water (DIW) were evaluated for egg pattymince (EPM) and green pea puree (GPP). Recovery ofPATP-injured spores during storage was determined. Thenumber of B. amyloliquefaciens spores in DIW wasreduced more than 6 log when treated at 121oC and 700MPa, including a come-up time reduction (3.32 log MPN/g) and a pressure holding time reduction (3.55 log MPN/g). Treatments at 700 MPa in combination with 105oC for16 min, 115oC for 5 min, or 121oC for 3 min, decreasedB. amyloliquefaciens spore populations in EPM to levelsundetectable using an enrichment procedure. No significant(p>0.05) recovery of PATP-injured spores was observed inEPM and GPP during storage for 8 weeks, compared withcontrols. These results provide useful information forenhancing microbial lethality of PATP-resistant bacterialspores in low-acid foods.
안주희,이현용,Lynn Knipe,V.M. Balasubramaniam 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.5
Effects of surface pasteurization on inactivationof Listeria innocua were investigated. Surface temperature,monitored during post-packaging pasteurization, was usedto predict the lethality of L. monocytogenes. Temperaturesreached 70oC for lean and fat sausages within 9 min oftreatment. An inoculation study validated the efficacy ofpost-processing and the thermal lethality of L. monocytogenes. Pre-cooked sausage and ham, inoculated with approximately107 CFU/cm2 of L. innocua, were heated to a surfacetemperature of 70oC. Numbers of L. innocua were reducedby 7 log on surface-inoculated sausage. Guidelines for safe,ready-to-eat meat products are provided for small scalemeat processors.
RATPHITAGSANTI, WANNASAWAT,AHN, JUHEE,BALASUBRAMANIAM, V. M.,YOUSEF, AHMED E. International Association for Food Protection 2009 Journal of food protection Vol.72 No.4
<P>Pressure-assisted thermal processing (PATP) is an emerging sterilization technology in which a combination of pressure (500 to 700 MPa) and temperature (90 to 120°C) are used to inactivate bacterial spores. The objective of this study was to examine the role of pressurization rate and pressure pulsing in enhancing PATP lethality to the bacterial spore. Bacillus amyloliquefaciens TMW 2.479 spore suspensions were prepared in deionized water at three inoculum levels (1.1 × 109, 1.4 × 108, and 1.3 × 106 CFU/ml), treated at two pressurization rates (18.06 and 3.75 MPa/s), and held at 600 MPa and 105°C for 0, 0.5, 1, 2, 3, and 5 min. Experiments were carried out using custom-fabricated, high-pressure microbial kinetic testing equipment. Single and double pulses with equivalent pressure-holding times (1 to 3 min) were investigated by using the spore suspension containing 1.4 × 108 CFU/ml. Spore survivors were enumerated by pour plating, using Trypticase soy agar after incubation at 32°C for 2 days. During short pressure-holding times (≤2 min), PATP treatment with the slow pressurization rate provided enhanced spore reduction over that of the fast pressurization rate. However, these differences diminished with extended pressure-holding times. After a 5-min pressure-holding time, B. amyloliquefaciens population decreased about 6 log CFU/ml, regardless of pressurization rate and inoculum level. Double-pulse treatment enhanced PATP spore lethality by approximately 2.4 to 4 log CFU/ml, in comparison to single pulse for a given pressure-holding time. In conclusion, pressure pulsing considerably increases the efficacy of PATP treatment against bacterial spores. Contribution of pressurization rate to PATP spore lethality varies with duration of pressure holding.</P>
R Sambath Kumar,T Sivakumar,V Senthil,N Venkateswara Murthy,V Balasubramaniam,R Kanaga Sabi,R. Shanmuga Sundram,P Perumal,U K Mazumder,M Gupta 경희대학교 융합한의과학연구소 2008 Oriental Pharmacy and Experimental Medicine Vol.8 No.2
The methanol extract of stem barks of Careya arborea Roxb. (MECA) (Family- Myrtaceae) was evaluated for antitumor activity and antioxidant status against Ehrlich’s Ascites Carcinoma (EAC) bearing Swiss albino mice. After 24 h of tumor inoculation the MECA was administered at the doses of 50, 100 and 200 mg/kg body weight/mice/day for 14 days. After the last dose and 18 h fasting mice were sacrificed. The effect of MECA on the growth of transplantable murine tumor, life span of EAC bearing hosts, hematological profiles, serum and liver biochemical parameters were estimated. The MECA showed significant (P < 0.01) decrease in ascites volume, packed cell volume and viable cell count and prolonged the life span of EAC tumor bearing mice. Hematological profiles reverted to more or less normal levels in extract treated mice. The MECA also produced protective effect by decreasing the activity of serum enzymes, bilirubin and increase the protein and uric acid levels. MECA significantly (P < 0.05) decreased the levels of lipid peroxidation, while significantly (P < 0.05) increased the levels of glutathione content, vitamin C, vitamin E, superoxide dismutase and catalase CAT. The results indicate that MECA exhibited significant antitumor and antioxidant activity in EAC bearing mice. The methanol extract of stem barks of Careya arborea Roxb. (MECA) (Family- Myrtaceae) was evaluated for antitumor activity and antioxidant status against Ehrlich’s Ascites Carcinoma (EAC) bearing Swiss albino mice. After 24 h of tumor inoculation the MECA was administered at the doses of 50, 100 and 200 mg/kg body weight/mice/day for 14 days. After the last dose and 18 h fasting mice were sacrificed. The effect of MECA on the growth of transplantable murine tumor, life span of EAC bearing hosts, hematological profiles, serum and liver biochemical parameters were estimated. The MECA showed significant (P < 0.01) decrease in ascites volume, packed cell volume and viable cell count and prolonged the life span of EAC tumor bearing mice. Hematological profiles reverted to more or less normal levels in extract treated mice. The MECA also produced protective effect by decreasing the activity of serum enzymes, bilirubin and increase the protein and uric acid levels. MECA significantly (P < 0.05) decreased the levels of lipid peroxidation, while significantly (P < 0.05) increased the levels of glutathione content, vitamin C, vitamin E, superoxide dismutase and catalase CAT. The results indicate that MECA exhibited significant antitumor and antioxidant activity in EAC bearing mice.
Kumar, R Sambath,Sivakumar, T,Senthil, V,Murthy, N Venkateswara,Balasubramaniam, V,Sabi, R Kanaga,Sundram, R. Shanmuga,Perumal, P,Mazumder, U K,Gupta, M Kyung Hee Oriental Medicine Research Center 2008 Oriental pharmacy and experimental medicine Vol.8 No.2
The methanol extract of stem barks of Careya arborea Roxb. (MECA) (Family- Myrtaceae) was evaluated for antitumor activity and antioxidant status against Ehrlich's Ascites Carcinoma (EAC) bearing Swiss albino mice. After 24 h of tumor inoculation the MECA was administered at the doses of 50, 100 and 200 mg/kg body weight/mice/day for 14 days. After the last dose and 18 h fasting mice were sacrificed. The effect of MECA on the growth of transplantable murine tumor, life span of EAC bearing hosts, hematological profiles, serum and liver biochemical parameters were estimated. The MECA showed significant (P < 0.01) decrease in ascites volume, packed cell volume and viable cell count and prolonged the life span of EAC tumor bearing mice. Hematological profiles reverted to more or less normal levels in extract treated mice. The MECA also produced protective effect by decreasing the activity of serum enzymes, bilirubin and increase the protein and uric acid levels. MECA significantly (P < 0.05) decreased the levels of lipid peroxidation, while significantly (P < 0.05) increased the levels of glutathione content, vitamin C, vitamin E, superoxide dismutase and catalase CAT. The results indicate that MECA exhibited significant antitumor and antioxidant activity in EAC bearing mice.