Search for Articles:
Journal:
Subject:

Search Filter

Years
Between: -
Article Types
Search Results (2768)
Order
page
文章
Neveen S. M. Soliman and Salwa A. Aly*
Abstract: This study aims at identifying the diversity and abundance of yeast associated with Egyptian Karish cheese, employing comparison between conventional laboratory techniques and API20 kits techniques in yeast identification. A total of one hundred samples (fifty each) of Egyptian raw and pasteurized Karish cheese milk were randomly collected from farmers and markets in Cairo and Giza Districts. The occurrence of yeast in raw and pasteurized Karish cheese milk were 100 and 38% with a mean value of 7 ± 1.1 l and 1 ± 0.31 log10 cfu g−1, respectively. Yeast strains isolated from both raw and pasteurized karish cheese samples were identified and characterized using both conventional methods and API 20 C AUX as a commercial identification system. The most prevalent isolates belonged to Trichosporon cutaneum (25%), Candida catenulata (23%), Yarrowia lipolytica (13%), Debaryomyces hansenii (13%), Kluyveromyces lactis (6%), Geotrichum candidum (7%), Candida zeylanoides (5%), Candida lambica (3%), Candida albicans (2%), Cryptococcus formans (1%), Rhodotorula glabrata (1%) and Saccharomyces cerevisiae (1%). There was no significant difference (P 0.05) between the conventional method and the API20 kits test. However, the results of this study reveal that API 20 kits are simple, highly useful and are commercially available kits that considerably shorten the time required for the identification of yeast in cheese.[...] Read More.
Keywords: Yeast identification, Karish cheese, API 20 kits.
Full text
Views:729
Download:769
文章
Hattem H. E.*, Manal A. Naeim, Hanaa S. Sakr and Elham H. Abouel-Einin
Abstract: The present study was carried out to investigate the effect of different thermal treatments on the composition and chemical properties of camel milk. The rennet clotting time of camel milk was also investigated. Camel milk samples were thermal treated at 63, 80 and 90°C for 30 min and 72°C for 15 s, whereas raw milk sample was served as a control. We found that the fat content was not affected by the applied treatments (3.2±0.189%), but the protein contents average ± SD values were found to be 3.2±0.148, 3.4±0.136, 3.4±0.149, 3.3±0.049 and 3.1±0.157%, respectively. The ash contents were also affected by the thermal treatments and their average ± SD values were 0.70±0.065, 0.71±0.056, 0.73±0.052, 0.71±0.088 and 0.68±0.096%, respectively. The thermal treatments affected also the total solids in the samples; 10.0±1.168, 10.10±1.057, 10.16±1.089, 10.05±1.055 and 9.9±1.189%, respectively. The non protein nitrogen (NPN), non casein nitrogen (NCN) and whey protein nitrogen (WPN) gradually decreased as thermal treatments were increased but casein number and the percentage of denaturation were increased. Rennet clotting time in the presence of different concentrations of CaCl2 (0 to 20 mg /100 ml) was found to be increasing by raising the temperature. However, increasing the amount of calcium chloride was found to be decreasing the rennet clotting time at all thermal treatment. Incubation of milk with yoghurt culture at 40°C for 12 h revealed a significant increase to the acidity level and a substantial decrease in the pH level at all the applied thermal treatments.[...] Read More.
Keywords: Camel milk, heat treatments, chemical composition, some properties.
Full text
Views:761
Download:752
文章
Idise, Okiemute Emmanuel
Abstract: Wine was produced at 1:4 (must: sugar) from coconut (Cocos nucifera) using natural yeast (Recipe A), natural yeast augmented with granulated sugar (Recipe B), natural yeast augmented with Baker’s yeast, granulated sugar (Recipe C), a control consisting of granulated sugar and Baker’s yeast (Recipe D). On fermentation for 120 h, pH values were 4.68±0.191, 4±0.029, 4.08±0.023, 3.65±0.058, temperature values (°C) were 28.75±0.61,  27.75±0.26, 28.25±0.43,  27.5±0.58,  specific gravity values were 1.003±0.0006, 1.012±0.00171,   1.001±0.0006,   0.99±0.0023,   optical   density   values   were   0.6918±0.019,     0.715±0.017, 0.774±0.0023,    0.752±0.005,    %   alcohol   (v/v)   values   were    1.359±0.002,    1.371±0.006,     1.357±0.007, 1.354±0.008,% titratable acidity values were 0.16±0.001, 0.809±0.044, 0.302±0.002, 0.382±0.015, Rf values were 4.7±0.017, 4.9±0.058, 4.25±0.052, 4.95±0.058 and total aerobic counts were 7.308±0.036, 7.183±0.067, 6.72±0.046, 7.175±0.014 for Recipes A to D respectively. Malo-lactic fermentation after 48h was evident. Taste testing showed very little differences in wines from Recipes A to C. Statistical analyses at 95% confidence level showed no significant differences in coconut wine produced with different recipes for the tested parameters. The wine from the control had similar taste and characteristics with natural palm wine. Coconut wine could thus be produced for immediate consumption within 48 h using the Recipes A - C.[...] Read More.
Keywords: Coconut, flora, fermentation, sugar, wine, flavor, yeast.
Full text
Views:838
Download:918
文章
R. Shavindra Dias
Abstract: Illicit brew contaminated with Paraquat, bipridyl non -selective contact herbicide, resulting in an epidemic of paraquat poisoning was investigated in Sri Lanka. It was found that the brewers use to hang the paraquat bottle with the lid pierced over the distilling cocktail. Brewers believe that condensed particles act as a catalyst, increasing the concentration and quality of the distillate. Clinical data, biochemical and histopathological data were used to confirm the poison. In-depth interviews and group discussions were used to elucidate the mechanism used by the illicit brewers. Due to an accident the paraquat bottle had slipped into the distilling cocktail resulting in this epidemic of paraquat poisoning.[...] Read More.
Keywords: Paraquat, Illicit, brewers, cocktail.
Full text
Views:698
Download:770
文章
João V. B. de Souza*, Alita M. Lima, Eveleise S. de J. Martins, Julia I. Salem
Abstract: The aim of this work was to increase the concentration of substances with anti-mycobacterium activity in culture filtrates obtained from the dematiaceous fungus C10. An experimental design was employed to study the effect of glucose, potato infusion and Senna reticulata infusion. The anti-mycobacterium activity was determined by evaluating the growth of bacteria in culture medium containing “culture filtrate” (the products of the submerged fermentation of the fungus). It was observed that the concentrations of glucose 30 g/L, potato infusion 50% v/v and S. reticulata infusion 0% v/v (a better result was obtained not using S. reticulata infusion) were the best conditions for metabolites production. The influence of each variable was determined and it was possible to produce a mathematical model and a surface response to demonstrate the influence of the studied variables. In conclusion, we note that the culture medium had a great importance in the production of culture filtrate with anti-mycobacterial activity and that the experimental design showed to be a functional statistical tool for studying the influence of culture medium composition.[...] Read More.
Keywords: Culture medium, Senna reticulata, endophytic fungi, experimental design.
Full text
Views:722
Download:822
文章
Olu Malomo*, Ogunmoyela O. A. B., Oluwajoba S. O., Adigun M. O. and Daniel ‘Toyosi
Abstract: The type and strain of yeast used in fermentation has a great influence on the taste and character of beer produced. Apart from brewing, sorghum has been used extensively in food industries. The essence of this study is to investigate the behavior of yeast in a sorghum/barley brew and also to investigate the sensory acceptability of such a combination. The study showed that the assessors were unable to detect if there were differences below a 40/60 blend, sorghum and barley mix respectively, beyond which all the organoleptic parameters presented became objectionable.[...] Read More.
Keywords: Organoleptic, fermentation, assessors, brewing, sorghum, barley.
Full text
Views:794
Download:791
文章
S. J. Sanei* and S. E. Razavi
Abstract: Olive leaf spot or peacock spot, caused by the fungal pathogen Spilocaea oleagina, can cause reduced growth and yield in olive trees (Olea eurapaea). Investigations were carried out during 2007-2010 to measure the prevalence and severity of olive leaf spot in the northern olive growing regions of Iran. The susceptibility of ten cultivars (Amygdalifolia, Blaidy, Koronakei, Mary, Manzanillo, Mission, Rooghany, Valatolina, Wild olive, Zard) to the disease was assessed. Olive scab was found in all study areas and with the worst affected in high relative humidity (Y= -21.058 + 0.794X, p[...] Read More.
Keywords: Peacock spot, Spilocaea oleagina, disease prevalence, disease severity, Iran.
Full text
Views:755
Download:783
文章
Vagner G. Cortez* , Iuri G. Baseia and Rosa Mara B. Silveira
Abstract: Boletales is an order of the subclass Phallomycetidae, which comprises of a wide variety of morphological types of macrofungi, including the boletes and earthballs. In this paper, the gasteroid members of the Boletales from Rio Grande do Sul State, in southern Brazil, were revised. Specimens were collected during the years 2006 to 2009, analyzed macro and microscopically and the collections are preserved at the herbarium ICN. The following taxa were recorded: Rhizopogon roseolus (Rhizopogonaceae), Calostoma zanchianum, Pisolithus arhizus, Scleroderma albidum, Scleroderma bovista, Scleroderma citrinum, Scleroderma dictyosporum, Scleroderma fuscum, Scleroderma laeve and Scleroderma verrucosum (Sclerodermataceae). Scleroderma dictyosporum and S. laeve are reported for the first time from Brazil. A key for the identification of the species of Scleroderma is provided and colour photographs and line drawings of the basidiospores are presented for all taxa studied.[...] Read More.
Keywords: Basidiomycota, calostomataceae, ectomycorrhizal fungi, Eucalyptus, Pinus, pisolithaceae, taxonomy.
Full text
Views:728
Download:806
文章
David, O. M.*, Fagbohun, E. D., Oluyege, A. O. and Adegbuyi, A.
Abstract: Nutriceutics potential and physicochemical properties of the oil extract from five species of macrofungi which include Ganoderma lucidium, Pleurotus tuberregium, Termytomyces robustus, Schizophyllum commune and Trametes versicolor were investigated using standard chemical and microbiological methods. The oil was extracted using Soxhlet method of extraction. Disc diffusion and agar dilution methods were used to test for the antibacterial and antifungal properties of the samples respectively. The extracted oils were tested against five clinical bacterial isolates: Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus, Serratia marcescens, Enterococcus faecalis and Escherichia coli. The susceptibility of three fungi genera to the oil samples was also tested. The potency of the extracts oils was determined at different concentrations. All the oils extracted from the mushroom were liquid at room temperature. The acid values of the oils ranged between 0.9 and 6.7 mg KOH/g in T. robustus and T. versicolor respectively. The high iodine values ranged between 39.8 in T. versicolor and 127.0 mg I2/100 g. The saponification value was above 100 mg KOH/g except T. robustus. The aromabiogram of the oils from the mushroom had a pronounced effect on the Gram negative bacteria. Oil from S. commune has the least inhibitory effect on the bacteria. The antifungal assay of P. tuberregium was most effective against Aspergillus parasiticus, followed by that of G. lucidium. The least effective was oil from T. versicolor. The performance of oil from G. lucidium was the best out of all the samples. The inhibitory activities of the oils were concentration dependent. The oils tested were good sources of antimicrobials.[...] Read More.
Keywords: Mushroom, oil, nutriceutics, antimicrobial, pathogens, macrofungi.
Full text
Views:920
Download:756
文章
Kathiresan Kandasamy*, Nabeel M. Alikunhi and Manivannan Subramanian
Abstract: Yeasts and other fungi are prevalent in marine and estuarine ecosystems where they play an important role in the food web. Marine yeasts are unique in performing fermentations under high salt concentrations. The mechanism underlying the high salt tolerance involves the ability to accumulate high concentrations of sodium without becoming intoxicated, and the exclusion of excessive sodium from the cytoplasm. Overall, the yeasts play major roles in fermentation, enzyme technology, pollution control, micro sensors, and in some medicinal and medical applications.[...] Read More.
Keywords: Marine yeast, deep sea, estuarine, mangrove, association.
Full text
Views:724
Download:772
Submit Your Manuscript Now