منابع مشابه
Enhance nisin yield via improving acid-tolerant capability of Lactococcus lactis F44
Traditionally, nisin was produced industrially by using Lactococcus lactis in the neutral fermentation process. However, nisin showed higher activity in the acidic environment. How to balance the pH value for bacterial normal growth and nisin activity might be the key problem. In this study, 17 acid-tolerant genes and 6 lactic acid synthetic genes were introduced in L. lactis F44, respectively....
متن کاملLactone derivatives from the marine-derived fungus Penicillium sp. PSU-F44.
Two new fungal metabolites, penicipyrone (1), and penicilactone (2), were isolated from the marine-derived fungus Penicillium sp. PSU-F44 along with three known macrolides, (+)-brefeldin A (3), (+)-brefeldin C (4), and 7-oxobrefeldin A (5). Their antimicrobial activities against methicillin-resistant Staphylococcus aureus SK1 and Microsporum gypseum SH-MU-4 were examined.
متن کاملDependence of SOA oxidation on organic aerosol mass concentration and OH exposure: experimental PAM chamber studies
The oxidation of secondary organic aerosol (SOA) is studied with mass spectra analysis of SOA formed in a Potential Aerosol Mass (PAM) chamber, a small flow-through photo-oxidation chamber with extremely high OH and ozone levels. The OH exposure from a few minutes in the PAM chamber is similar to that from days to weeks in the atmosphere. The mass spectra were measured with a Quadrupole Aerosol...
متن کاملChemical Evolution of Secondary Organic Aerosol from OH-Initiated Heterogeneous Oxidation
The heterogeneous oxidation of laboratory Secondary Organic Aerosol (SOA) particles by OH radicals was investigated. SOA particles, produced by reaction of αpinene and O3, were exposed to OH radicals in a flow tube, and particle chemical composition, size, and hygroscopicity were measured to assess modifications due to oxidative aging. Aerosol Mass Spectrometer (AMS) mass spectra indicated that...
متن کاملOrganic Aerosol Components Observed in Northern Hemispheric Datasets from Aerosol Mass Spectrometry
In this study we compile and present results from the factor analysis of 43 Aerosol Mass Spectrometer (AMS) datasets (27 of the datasets are reanalyzed in this work). The components from all sites, when taken together, provide a holistic overview of Northern Hemisphere organic aerosol (OA) and its evolution in the atmosphere. At most sites, the OA can be separated into oxygenated OA (OOA), hydr...
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ژورنال
عنوان ژورنال: Arthropod Management Tests
سال: 2012
ISSN: 2155-9856
DOI: 10.4182/amt.2012.f44