Physicochemical Characteristics and Microbial Quality of an Oil Polluted Site in Gokana, Rivers State.

The effect of novel antimicrobial peptides (AMPs) and antimicrobial peptide microspheres (AMS) on the physicochemical and microbial quality of Tricholoma matsutake wild edible mushrooms was investigated. In the experiments, 1.0 g/L, 0.5 g/L of AMS, and 1.0 g/L AMPs were used as preservatives. Mushrooms coated with 1.0 g/L and 0.5 g/L of AMS as a preservative had better physicochemical and sensory qualities than did mushrooms coated with 1.0 g/L of AMPs. In the experiment, 1.0 g/L of blank microspheres without cathelicidin-BF-30 (PLGA-1.0) and distilled water was used as the control. Samples with these two treatments had minimal changes in texture, weight loss, total bacteria count, and sensory attributes. Research results suggests that the use of AMS can maintain the quality of Tricholoma matsutake wild edible mushrooms and could extend the postharvest life to 20 d.

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Microbial Quality of Human Wastes and Treatment Plant Effluent

Water Science & Technology ◽

10.2166/wst.1986.0297 ◽

1986 ◽

Vol 18 (7-8) ◽

pp. 257-265 ◽

Cited By ~ 3

Author(s):

K. Kawamura ◽

M. Kaneko

Keyword(s):

Staphylococcus Aureus ◽

Vibrio Cholerae ◽

Treatment Plant ◽

Microbial Quality ◽

Chlorination Process ◽

Fecal Streptococci ◽

Human Wastes ◽

Micro Organisms ◽

Spore Forming Bacteria

In order to evaluate the microbial quality of human wastes and effluents from treatment processes, the microbial flora of samples was examined. Total coliforms, fecal coliforms and fecal streptococci were used as indicator micro-organisms, and Vibrio cholerae non O-1, Salmonella, Staphylococcus aureus and Welchii (Clostridium perfrigens) were selected as pathogenic organisms. Salmonella was detected in only the water samples from the night soil treatment plant, while Staphylococcus aureus was detected in the night soil and the samples from the night soil purification tanks. Vibrio cholerae non 0-1 was not detected in any samples, but Welchii existed in almost all samples. Generally, the density levels and distribution patterns of the indicator micro-organisms were similar to those in the raw wastewaters. The microbial flora was not changed remarkably after the primary sedimentation process and the biological treatment process. After the chlorination process, total colonies, spore-forming bacteria, Welchii, moulds and fecal streptococci could survive, and spore-forming bacteria formed the majority of the total colonies in the well-chlorinated effluents. Welchii at the level of 103/100 ml can be used as the indicator micro-organism to ensure a sanitary safe discharge, because it can survive at the level of 103−104/100 ml even if other indicators and pathogenic micro-organisms are inactivated completely by the chlorination process.

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Impact of gelatin nanogel coating containing thymol and nisin on the microbial quality of rainbow trout fillets and the inoculated Listeria monocytogenes

Aquaculture Research ◽

10.1111/are.15239 ◽

2021 ◽

Author(s):

Fatemeh Mohajer ◽

Saeid Khanzadi ◽

Kobra Keykhosravy ◽

Seyyed Mohammad Ali Noori ◽

Mohammad Azizzadeh ◽

...

Keyword(s):

Rainbow Trout ◽

Listeria Monocytogenes ◽

Microbial Quality

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Comparative Studies of Ginger (Zingiber officinale) and West African Black Pepper (Piper guineense) Extracts at Different Concentrations on the Microbial Quality of Soymilk and Kunun-zaki

Nigerian Food Journal ◽

10.1016/s0189-7241(15)30033-3 ◽

2012 ◽

Vol 30 (2) ◽

pp. 38-43 ◽

Cited By ~ 1

Author(s):

E.A. Udensi ◽

T.C. Odom ◽

C.O. Dike

Keyword(s):

Comparative Studies ◽

Zingiber Officinale ◽

Black Pepper ◽

West African ◽

Microbial Quality ◽

Piper Guineense ◽

African Black

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Impact of High-Pressure Homogenization Parameters on Physicochemical Characteristics, Bioactive Compounds Content, and Antioxidant Capacity of Blackcurrant Juice

Molecules ◽

10.3390/molecules26061802 ◽

2021 ◽

Vol 26 (6) ◽

pp. 1802

Author(s):

Bartosz Kruszewski ◽

Katarzyna Zawada ◽

Piotr Karpiński

Keyword(s):

High Pressure ◽

Vitamin C ◽

Antioxidant Capacity ◽

Bioactive Compounds ◽

Titratable Acidity ◽

Physicochemical Characteristics ◽

Food Preservation ◽

Inlet Temperature ◽

High Pressure Homogenization

High-pressure homogenization (HPH) is one of the food-processing methods being tested for use in food preservation as an alternative to pasteurization. The effects of the HPH process on food can vary depending on the process parameters used and product characteristics. The study aimed to investigate the effect of pressure, the number of passes, and the inlet temperature of HPH processing on the quality of cloudy blackcurrant juice as an example of food rich in bioactive compounds. For this purpose, the HPH treatment (pressure of 50, 150, and 220 MPa; one, three, and five passes; inlet temperature at 4 and 20 °C) and the pasteurization of the juice were performed. Titratable acidity, pH, turbidity, anthocyanin, vitamin C, and total phenolics content, as well as colour, and antioxidant activity were measured. Heat treatment significantly decreased the quality of the juice. For processing of the juice, the best were the combinations of the following: one pass, the inlet temperature of 4 °C, any of the used pressures (50, 150, and 220 MPa); and one pass, the inlet temperature of 20 °C, and the pressure of 150 MPa. Vitamin C and anthocyanin degradation have been reported during the HPH. The multiple passes of the juice through the machine were only beneficial in increasing the antioxidant capacity but negatively affected the colour stability.

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