INFLUENCE OF TEMPERATURE AND GAS CONCENTRATION ON THE PHYSICAL-CHEMICAL, SENSORY AND MICROBIOLOGICAL PARAMETERS OF MINIMALLY PROCESSED APPLES (MALUS XDOMESTICA , B.) CV GALA

2012 ◽  
Vol 37 (5) ◽  
pp. 405-412
Author(s):  
CRISTIANE FAGUNDES ◽  
RENATA DIAS MELLO CASTANHO AMBONI ◽  
ALCILENE RODRIGUES MONTEIRO
2019 ◽  
Vol 35 (1) ◽  
pp. 228-233
Author(s):  
Laura Aikozova ◽  
Ainur Tukibayeva ◽  
Marat Satayev

This article presents thermodynamic calculations of the interaction of zinc and iron chlorides with phosphoric acid. The influence of temperature and duration of the interaction on the degree of decomposition of metal chlorides is also determined. It is established that with increasing the temperature and the duration of interaction, the degree of conversion of zinc and iron chlorides to metal phosphates increases and the residual chlorine content in the product simultaneously decreases. The quality control of the obtained products was carried out using physical, chemical and crystal-optical methods of analysis.


2019 ◽  
Vol 5 ◽  
pp. 64-69
Author(s):  
Sergiy Bochkarev ◽  
Anna Belinska ◽  
Oleksandra Varankina ◽  
Valeriya Ananieva ◽  
Igor Petik ◽  
...  

The aim of the research is to determine the microbiological stability of a protein-fat mixture of flax and sesame seeds that allows to correct its storage life. A protein-fat mixture has a high content of irreplaceable amino acids ВСАА and polyunsaturated fatty acids of w-3group, so it may be positioned as a component of nutrition for athletes. Flax and sesame seeds, cultivated in Ukraine, were used as research materials. The product was created, based on comminuted flax and sesame seeds in ratio 1:1. There were determined organoleptic (outlook, taste, smell, color) and physical-chemical (mass share of moisture, ash, protein, fat, acidic, peroxide, anisidine number) parameters of the product. There was determined the microbiological stability of the protein-fat mixture of the increased food value for athletes nutrition after 6 months. It has been proved, that as opposite to the control sample, the protein-fat mixture of the developed composition manifests its microbiological stability by the following parameters: content of mesophilic aerobic and facultative anaerobic microorganisms, molds, yeast, bacteria of the colon bacillus group and pathogenic microorganisms. The control sample that is comminuted flax seeds doesn’t manifest at the end of the storage term any correspondence of microbiological parameters by the content of mesophilic aerobic and facultative anaerobic microorganisms, molds, and bacteria of the colon bacillus group. This regularity is explained by the presence of lignans, sesamol and sesamoline, with preservative properties in the developed product. The obtained data may be used for reasoning recipes of products, based on the protein-fat mixture and correction of the food supplements ratio in them.


Author(s):  
О. С. Гавриленко ◽  
О. А. Хоміцька ◽  
О. В. Липовець

У статті наведено результати досліджень 22-х зразків м'ясних та м'ясорослинних консервів українських виробників за органолептичними, фізико-хімічними та мікробіологічними показниками. Проаналізовано показники якості та безпечності консервів, що реалізуються в торговій мережі по Україні. За результатами проведених досліджень встановлені невідповідності дослідних зразків консервів українських підприємств-виробників вимогам стандартів за органолептичними, фізико-хімічними та мікробіологічними показниками, що свідчить про те, що м'ясо, закладене в банки було нижчого ґатунку і не зовсім якісним, а також мають місце порушення на етапах технологічних операцій виробництва та стерилізації. The results of study of 22 samples of canned meat of Ukrainian producers by organoleptic, physical-chemical and microbiological parameters. According to the results of the studies we found established inconsistencies of experimental samples of canned Ukrainian enterprises-manufacturers of standard requirements for organoleptic, physical, chemical and microbiological parameters, which indicates that the meat placed in the banks was of a lower quality, and there were violations at the stages of production and sterilization.


2014 ◽  
Vol 15 (1&2) ◽  
pp. 95-98
Author(s):  
Indu Bhushan Sharma ◽  
Arvind Kumar Yadav ◽  
Vijeshwar Verma

Water quality is an index of health and well being of a society. The pollution of water bodies is one of the areas of major concern to environment. In the present investigation an attempt has been made to evaluate the physical, chemical and microbiological parameters of Jhajjar rivulet of J&K. The study has been carried out by taking water samples at three different sites of the rivulet i.e. site 1, site 2 and site3. During the study, the physico-chemical parameters like pH, temperature, colour, total hardness, BOD, COD, DO, TDS and TSS in the water samples were studied. In microbiological examination, the presence of coliform in the water samples were studied.  It has been observed that there was a pollution load mostly at site 3 and slightly at site 2, it may be due to the release of huge quantities of sewage, effluent and manmade activities at the respective sites but the water from all the sites was found free from microbial contamination. It was concluded that water at site 1 is suitable for drinking as compared to site 2 and site 3 of the rivulet.


2021 ◽  
Vol 10 (8) ◽  
pp. e5510817024
Author(s):  
Vanessa Barbieri Bombana ◽  
Carolina Elisa Demaman Oro ◽  
Diane Rigo ◽  
Caroline Chies Polina ◽  
Andressa Franco Denti ◽  
...  

The objective of this work was to evaluate the influence of temperature on the content of bioactive compounds of fruits of guabiju (Myrcianthes pungens (O. Berg) D. Legrand). The peel, pulp and seed of fresh guabiju were analyzed in relation to physical-chemical composition, metals, color, phenolic compounds, flavonoids, anthocyanins, vitamin C and antioxidant activity. On the dehydrated samples at temperature of 60 °C, where also determined the moisture and water activity. The fractions of the fruit showed high amounts of metals. After drying, moisture of 1.3, 1.0 and 0.9% were observed for peel, pulp and seed and water activity of 0.44 to 0.54. All the samples darkened, with less variation in the dehydrated peel (∆E 9.2). The samples showed high values of bioactive compounds, and in the fresh peel were observed higher levels of phenolic compounds (8459.8 mg EGA/100g dry extract), anthocyanins (152.0 mg/100 dry extract) and vitamin C (222.9 mg/100g) and on the dehydrated seed higher value of flavonoids (7480.7 mg EQ/100g dry extract). There was 86.3% degradation of anthocyanins in the dehydrated peel. The best values of antioxidant activities were obtained for the dehydrated peel (IC50 1.37 mg/mL), seed (IC50 1.49 mg/mL) and in the fresh peel (IC50 1.41 mg/mL).


2000 ◽  
Vol 42 (10-11) ◽  
pp. 83-90 ◽  
Author(s):  
L. Herrera ◽  
G. Castillo

A 3-modular units facultative waste stabilisation pond was experimentally studied for performance and efficiency, in relation to its original design. The system was located at La Esmeralda, Melipilla a small town of the central region in Chile. It was found that treated water did not comply with treatment requirements due to overloading, flow dynamics, wrong assumptions regarding hydraulic mixing behaviour, and an overestimation of systems kinetics. The overloading in terms of flow led to a retention time which was 62% of original design. Furthermore, bad mixing further decreased the designed residence time to only 18%. The effluent did not meet the WHO faecal coliforms guidelines for unrestricted irrigation. The modelling work on the batch faecal coliforms and coliphage removal concluded that the effective decay rates were 1.359×1.087(T-20°C) day-1 for coliforms, and 0.439×1.044(T-20°C) day-1 for coliphages. The data was also well fitted by a model that incorporated solar radiation. However, model discrimination indicated that the dependence on temperature gave a better and more sensitive fit with the observed data. As the original design considered a lower faecal coliforms decay ratio, namely 0.7 day-1, the failure of the system had to relate more to mixing than overloading. Operational seasonal data (flow and retention time) and physical, chemical and microbiological parameters, and tracer studies are included. Some solutions for improving the La Esmeralda SWP performance are also discussed.


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