Factors Affecting Resistance to Heat and Recovery of Heat-Injured Bacteria
نویسندگان
چکیده
منابع مشابه
Agar underlay method for recovery of sublethally heat-injured bacteria.
A method of recovering sublethally heat-injured bacteria was developed. The procedure (termed the agar underlay method) uses a nonselective agar underlaid with a selective medium. In a two-chambered petri dish, the Lutri plate (LP), a nonselective agar is inoculated with a population of sublethally heat-injured bacteria. After a 2-h repair incubation period, selective agar is added to the botto...
متن کاملRecovery of heat-injured Listeria innocua.
Listeria innocua was subjected to thermal inactivation and the extent of heat-injured cells was quantified. Cultures were heated in liquid medium for different times, using temperatures in the range of 52.5 to 65.0 degrees C, and plated on Tryptic Soy Agar with 0.6% yeast extract (TSAYE) used as non-selective medium and on TSAYE plus 5% NaCl (TSAYE+NaCl) and Palcam agar with selective supplemen...
متن کاملRecovery of viability and radiation resistance by heat-injured conidia of Penicillium expansum Lk. ex Thom.
Spores heated in water at 54 C for up to 1 hr were plated on nutrient agar immediately or held for 3 days in aerated water at 23 C and then plated. Under these conditions, holding was optimal for recovery, increasing survival percentage up to 20-fold over values for immediate plating. Recovery was prevented partially or completely, however, when spores were held in any of the following solution...
متن کاملFactors affecting recovery of Neosartorya fischeri ascospores after exposure to dry heat.
Recovery of Neosartorya fischeri ascospores subjected to a dry heat treatment (DHT) at 95 degrees C, 50% relative humidity (RH) for 60 minutes increased exponentially as the initial temperature of the recovery buffer increased. Different diluents were evaluated and the same recovery pattern was obtained when water or dilute buffers were used to recover the DHT spores. However, when glycerol was...
متن کاملFactors affecting quarantine heat treatment efficacy
Heat quarantine treatments have been used for 70 years on a variety of fresh agricultural commodities and pests. Despite the high level of efficacy demanded of these treatments and the very low levels of infestation usually found in commodities traded across quarantine barriers, heat treatments have sometimes failed. Key differences between investigation and application which may affect treatme...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1969
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(69)86615-4