Microbiological bases of natural milk starter culture

2021 ◽  
Author(s):  
Oleg Sidorenko

For the first time, the educational and methodological manual summarizes knowledge about the peculiarities of the ecology of lactobacilli of natural starter cultures of different geographical zones of Russia. Geographical races of lactobacilli and yeast of dairy national products can be a source of new, more resistant to extreme factors (including medicinal preparations) enzymes that will be in demand in biotechnology, medicine. Gives fundamentally important predictions that can be experimentally verified. The prospect of treating the microbiome of the digestive organs is shown — eliminating therapy with bacteriophages, lactotherapy instead of chemotherapy. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for the preparation of students of biological specialties, agricultural technologists, as well as bachelors in the profiles "Technology of production, storage and processing of animal products" and "Natural starter cultures" in the directions: 35.03.07 "Technology of production and processing of agricultural products", 19.03.03 and 19.04.03 "Food of animal origin".

2020 ◽  
Author(s):  
Oleg Sidorenko ◽  
Ekaterina Zhukova

The textbook examines the role of microorganisms in shaping the quality of animal products, describes the microorganisms that affect the quality of food and processes caused by technically and technologically important microflora. The basic principles of microbiological control of milk and meat processing products production are described. The second edition focuses on the quality and safety of food products of animal origin. The material has been reworked and supplemented with the results of recent research, which can be used in the training program for microbiologists in food technology. Meets the requirements of Federal state educational standards of higher education of the latest generation. For students studying in biological specialties, agricultural technologists in the profile "Technology of production, storage and processing of animal products" and in the areas of training 35.03.07 "Technology of production and processing of agricultural products", 19.03.03, 19.04.03 "food of animal origin".


2020 ◽  
Author(s):  
Andrey Zabashta ◽  
Tat'yana Shalimova ◽  
Valer'yan Basov

The textbook describes the structure and chemical composition of eggs, requirements for food chicken eggs, conditions for collection, sorting, packaging, transportation and storage. Possible defects of eggs and ways of their prevention are given. Technologies for the production of frozen and dry egg products are described. Meets the requirements of the Federal state educational standards of higher education of the latest generation. For undergraduate students studying in the direction 19.03.03 "food of animal origin" (profile "technology of meat and meat products").


2004 ◽  
Vol 33 ◽  
pp. 1-35 ◽  
Author(s):  
D. Thomas ◽  
D. Rangnekar

Livestock production currently accounts for some 40% of the gross value of world agricultural production, and its share is rising (FAO, 2002). Livestock production is the largest user of agricultural land; directly through grazing of pastures and indirectly through the production of forage crops and other feeds. Over the next 20 years, there will be a massive increase in demand for food of animal origin in developing countries, and this increase will be greater than for either the major cereals or roots and tubers (IFPRI, 1995; Delgado et al., 1999).


1981 ◽  
Vol 4 ◽  
pp. 439-448
Author(s):  
W. Schaefer-Kehnert

It is a world-wide experience that economic growth creates an increasing demand for food of animal origin, and, once a certain income level is reached, the demand for food of vegetable origin shrinks. Therefore, the proportion of animal products in the human diet is almost an indicator of the income level achieved by certain population groups or whole countries (excluding vegetarian societies on the one hand and pastoral societies on the other). FAO's provisional food balance sheets (FAO, 1977) indicate that, in most low income countries, animal products contribute less than 10% to total energy intake, whereas in high income countries they contribute almost 50%


2019 ◽  
Vol 94 (1) ◽  
pp. 187-196 ◽  
Author(s):  
Daria Savvateeva ◽  
Jorge Numata ◽  
Robert Pieper ◽  
Helmut Schafft ◽  
Monika Lahrssen-Wiederholt ◽  
...  

AbstractTetrachlorodibenzo-p-dioxin (TCDD) is a ubiquitous, toxic, persistent and bioaccumulative organic pollutant. TCDD can potentially enter the food chain through contaminated food of animal origin as a consequence of feed contamination. Prediction of the TCDD transfer from feed into animal products is thus important for human health risk assessment. Here, we develop several physiologically based toxicokinetic (PBTK) models of TCDD transfer from contaminated feed into growing pigs (Sus scrofa) exposed to doses ranging from 24.52 to 3269.25 ng of TCDD. We test the consequences of explicit dose-dependent absorption (DDA) versus the indirect effects of a self-induced liver metabolism (SIM). The DDA and SIM models showed similar fit to experimental data, although currently it is not possible to unequivocally make statement on a mechanistic preference. The performance of both toxicokinetic models was successfully evaluated using the 1999 Belgian case of contaminated fats for feeding. In combination with toxicokinetic models of other dioxin congeners, they can be used to formulate maximum allowance levels of dioxins in feedstuffs for pigs. Additionally, the implementation of in silico-predicted partition coefficients was explored as a useful alternative to predict TCDD tissue distribution in low-dose scenarios without recurring to animal experiments.


1999 ◽  
Vol 82 (2) ◽  
pp. 337-358 ◽  
Author(s):  
René K Juhler ◽  
Milter Green Lauridsen ◽  
Mette Rindom Christensen ◽  
Gudrun Hilbert

Abstract The paper presents results of analyses of 4182 samples collected from January 1995 to December 1996 for the Danish National Pesticide Monitoring Program. The program basis is a random sample control supplemented with a target control. The objectives of the control are to monitor consumer exposure to health hazards and to enforce national and European Community regulations. The Danish Veterinary and Food Administration is responsible for establishing methods, data manipulation, and evaluation, but actual analyses are performed at 4 regional laboratories. In addition to a description of the Danish National Pesticide Monitoring Program on food, the effects of lowering the reporting limits are discussed. Pesticides included are those in current use as well as chlorinated pesticides like lindane, DDT, and HCB, occurring in food now primarily as a result of environmental contamination. Commodities analyzed are fruits, vegetables, cereals, bran, fish, and animal products such as meat, butter, cheese, fat, and eggs. In fruits and vegetables, residues were detected in 10% of 2515 samples, with higher incidences of detection for foreign commodities. Violation rate was 0.6%. In food of animal origin, low levels of organo- chlorine pesticides were detected in most fish samples and in more than half of the animal product samples. However, no results exceeding maximum residue limits were found. No residues of organo- phosphorus pesticides were detected in the 231 meat samples analyzed.


Author(s):  
Juan García-Díez ◽  
Cristina Saraiva

Starter cultures can be defined as preparations with a large number of cells that include a single type or a mixture of two or more microorganisms that are added to foods in order to take advantage of the compounds or products derived from their metabolism or enzymatic activity. In foods from animal origin, starter cultures are widely used in the dairy industry for cheese, yogurt and other fermented dairy products, in the meat industry, mainly for sausage manufacture, and in the fishery industry for fermented fish products. Usually, microorganisms selected as starter culture are isolated from the native microbiota of traditional products since they are well adapted to the environmental conditions of food processing and are responsible to confer specific appearance, texture, aroma and flavour characteristics. The main function of starter cultures used in food from animal origin, mainly represented by lactic acid bacteria, consists in the rapid production of lactic acid, which causes a reduction in pH, inhibiting the growth of pathogenic and spoilage microorganisms, increasing the shelf-life of fermented foods. Also, production of other metabolites (e.g., lactic acid, acetic acid, propionic acid, benzoic acid, hydrogen peroxide or bacteriocins) improves the safety of foods. Since starter cultures have become the predominant microbiota, it allows food processors to control the fermentation processes, excluding the undesirable flora and decreasing hygienic and manufacturing risks due to deficiencies of microbial origin. Also, stater cultures play an important role in the chemical safety of fermented foods by reduction of biogenic amine and polycyclic aromatic hydrocarbons contents. The present review discusses how starter cultures contribute to improve the microbiological and chemical safety in products of animal origin, namely meat, dairy and fishery products.


2015 ◽  
Vol 8 (1) ◽  
pp. 121-132 ◽  
Author(s):  
S.C. Duarte ◽  
C.M. Lino ◽  
A. Pena

Several toxic effects have been described after exposure to ochratoxin A (OTA), which can enter the human diet directly through food or through animal products via carry-over from contaminated feed. To assess the exposure of the Portuguese population to OTA, a study over a two-year period was conducted. It involved analysis of 472 morning urine samples from inhabitants of four regions, together with a survey of regional bread (738) and pork (254) samples. These foodstuffs are two staple foods in the Portuguese and Mediterranean diet that present a high and widespread consumption by the majority of the population. The bread samples analysed showed a low level of contamination, although the contamination range was broad and some of the samples exceeded the maximum level established in the European Union. Maize bread (broa), especially when made by mixing with rye, was the most contaminated, followed by whole grain-, rye- and wheat-based bread. However, the latter contributed more to OTA exposure, because they were more commonly consumed. Even though the occurrence was rather low, the average OTA amount in pork was relatively high compared to previous national and other surveys. The observed high within-subject variability of OTA in urine limited the use of this biomarker of exposure at the individual level, but not on a population or subgroup of subjects scale. Among the studied population, a widespread exposure was confirmed by the high frequency of OTA contamination in urine, although characterised by a low average contamination level. Independent of region or population, pork appears to be the main contributor to the daily OTA intake in Portugal. These data were clearly in contrast with previous studies showing that cereals and their derived products were the major contributors, while food of animal origin only contributed a small part to the total human dietary OTA exposure.


2012 ◽  
Vol 27 (4) ◽  
pp. 388-391 ◽  
Author(s):  
Gordana Vitorovic ◽  
Branislava Mitrovic ◽  
Velibor Andric ◽  
Mirjana Stojanovic ◽  
Mirjana Lazarevic-Macanovic ◽  
...  

The main aim of this study was to investigate the impact of the coal mine in Lazarevac, and the coal-fired power stations in Obrenovac, on the activity concentrations of radionuclides 40K, 238U, 232Th, and 137Cs in some parts of human food chain of people living in the surrounding area. The obtained results showed that natural environment around the examined coal mine and the coal-fired power stations are not significantly affected by the emission of primordial radionuclides. The activity concentrations of 238U in the soil around the open coal mine and the coal processing installations (66.4-76.0 Bq/kg) and in the soil around the coal-fired power stations (55.5-61.2 Bq/kg) were not significantly higher than the average values in Serbia. The significant increase in the activity concentrations of natural radioisotopes in the samples of soil, vegetation, and animal products, was not confirmed. Food of animal origin used in human consumption is safe, i. e. not contaminated by radiation.


2021 ◽  
Author(s):  
Galina Chebakova ◽  
Mariya Gorbacheva ◽  
Konstantin Esepenok

Technologies of milk and dairy products production, technologies of slaughter of farm animals, poultry and rabbits, commodity characteristics of milk and dairy products, meat of slaughtered animals, offal, ghee, sausage products, canned meat and semi-finished products, chicken eggs and egg products are considered. The classification and characteristics of dairy and meat products are given, taking into account the new national standards developed in recent years; the terms and definitions for dairy and meat products are presented in a new interpretation. Meets the requirements of the federal state educational standards of higher education of the latest generation. For university students studying in the field of training 38.03.07 "Commodity science". It can be useful for experts, researchers and a wide range of consumers.


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