Advanced material with antibacterial properties would be a promising way to improve the disinfection process in food plants. Our objective was to combine the bactericidal effect of TiO2 with the mechanical strength of...Advanced material with antibacterial properties would be a promising way to improve the disinfection process in food plants. Our objective was to combine the bactericidal effect of TiO2 with the mechanical strength of TiN coatings. A TiO2 rutile film was obtained after annealing of a supplied 316 stainless steel with a TiN coating. This TiO2 upperlayer displays a photocatalytic activity under UV light exposure. The substrates with the TiN coating and the TiO2 upperlayer are more hydrophobic than the 316 control. The adhesion of either Listeria or Pseudomonas, on 316-TIN is characterized by the presence of clusters of cells, while the oxidation of the TiN surface leads to a more hydrophilic layer where cells are individualized. After UV illumination of the adherent cells and subsequent growth, the residual bacterial population present on 316-TIO2 is lower than that present on the 316-TIN. The bactericidal effect is more important on Listeria than on Pseudomonas.展开更多
1089 strains of yeasts were obtained from seawater,sea sediments,mud of sea salterns,guts of marine fishes,mangroveplants and marine algae.The results of routine identification and molecular analysis methods show that...1089 strains of yeasts were obtained from seawater,sea sediments,mud of sea salterns,guts of marine fishes,mangroveplants and marine algae.The results of routine identification and molecular analysis methods show that 44 strains among the marineyeasts obtained in this study belong to Candida tropicalis,which may indicate its wide distribution in different environment,especially in the tropical and subtropical marine environment.The wide distribution of C.tropicalis indicates that it may play an important role in marine environment and the marine environment in turn is a good source for obtaining C.tropicalis.展开更多
Lack of information about the available species of mushroom, the distribution along different ecological zones and purposes for which they have been used has hampered their domestication for sustainable production. Th...Lack of information about the available species of mushroom, the distribution along different ecological zones and purposes for which they have been used has hampered their domestication for sustainable production. This study assessed the diversity, distribution and uses of wild edible mushrooms in Ekiti State. The study area was stratified based on vegetation distribution into two zones （rainforest and derived savanna zones）. Pre-tested semi-structured questionnaires were administered to 80 randomly selected respondents for data collection. Descriptive statistical technique of frequency counts and percentages were used to summarize the data. Information from the study revealed that 52.5% and 67.5% of the respondents are above 50 years in the rain forest and the derived savannah vegetation, respectively. About 57.5% and 47.5% of the respondents had at least secondary education in the rainforest and derived savannah vegetation, respectively, while majority of the respondents with over 20 years of collection experience carried out their hunting in free areas outside forest reserve in both ecological zones. Twenty different species of mushroom are collected at different period of the year for consumption. The study recommended that government should checkmate further destruction of the remaining natural forest to ensure continued availability of these mushrooms.展开更多
文摘Advanced material with antibacterial properties would be a promising way to improve the disinfection process in food plants. Our objective was to combine the bactericidal effect of TiO2 with the mechanical strength of TiN coatings. A TiO2 rutile film was obtained after annealing of a supplied 316 stainless steel with a TiN coating. This TiO2 upperlayer displays a photocatalytic activity under UV light exposure. The substrates with the TiN coating and the TiO2 upperlayer are more hydrophobic than the 316 control. The adhesion of either Listeria or Pseudomonas, on 316-TIN is characterized by the presence of clusters of cells, while the oxidation of the TiN surface leads to a more hydrophilic layer where cells are individualized. After UV illumination of the adherent cells and subsequent growth, the residual bacterial population present on 316-TIO2 is lower than that present on the 316-TIN. The bactericidal effect is more important on Listeria than on Pseudomonas.
基金supported by the National Infrastructure of Natural Resources for Science and Technology Program of China(Grant No.2005DKA21209)
文摘1089 strains of yeasts were obtained from seawater,sea sediments,mud of sea salterns,guts of marine fishes,mangroveplants and marine algae.The results of routine identification and molecular analysis methods show that 44 strains among the marineyeasts obtained in this study belong to Candida tropicalis,which may indicate its wide distribution in different environment,especially in the tropical and subtropical marine environment.The wide distribution of C.tropicalis indicates that it may play an important role in marine environment and the marine environment in turn is a good source for obtaining C.tropicalis.
文摘Lack of information about the available species of mushroom, the distribution along different ecological zones and purposes for which they have been used has hampered their domestication for sustainable production. This study assessed the diversity, distribution and uses of wild edible mushrooms in Ekiti State. The study area was stratified based on vegetation distribution into two zones （rainforest and derived savanna zones）. Pre-tested semi-structured questionnaires were administered to 80 randomly selected respondents for data collection. Descriptive statistical technique of frequency counts and percentages were used to summarize the data. Information from the study revealed that 52.5% and 67.5% of the respondents are above 50 years in the rain forest and the derived savannah vegetation, respectively. About 57.5% and 47.5% of the respondents had at least secondary education in the rainforest and derived savannah vegetation, respectively, while majority of the respondents with over 20 years of collection experience carried out their hunting in free areas outside forest reserve in both ecological zones. Twenty different species of mushroom are collected at different period of the year for consumption. The study recommended that government should checkmate further destruction of the remaining natural forest to ensure continued availability of these mushrooms.
