DEFINITION OF INDEXES OF SAFETY OF THE FRESH VEGETABLES GROWING IN THE NOVOSIBIRSK REGION

Author(s):  
С.Ю. ГЛЕБОВА ◽  
О.В. ГОЛУБ ◽  
Н.И. ДАВЫДЕНКО

В обороте могут находиться овощи, соответствующие требованиям нормативной документации по химической, радиационной и микробиологической безопасности. Овощи отличаются способностью к накоплению чужеродных, потенциально опасных соединений антропогенного и природного происхождения из-за широкого использования пестицидов, удобрений и т. д. Цель исследования – определить безопасность свежих овощей – кабачков, тыквы, брюквы, свеклы и ревеня, произрастающих в Новосибирском районе Новосибирской области. При выполнении исследований использовали общепринятые методы испытаний. В результате проведенных исследоваий установлено, что в овощах содержание токсичных элементов не превышает регламентируемых ТР ТС 021/2011 «О безопасности пищевой продукции» нормативов: кадмия в кабачках, тыкве, свекле, брюкве и ревене (черешках) соответственно 0,0039, 0,013, 0,011, менее 0,005 мг/кг; свинца – 0,021, 0,016, 0,015, 0,0044, 0,021 мг/кг; мышьяка – менее 0,02 мг/кг (в черешках ревеня – менее 0,04 мг/кг), ртути – менее 0,002 мг/кг. В исследованных овощах пестициды (гексахлорциклогексан (б-, в-, г-изомеры) и ДДТ и его метаболиты) не обнаружены при пределе обнаружения 0,007 мг/кг. Нитраты в черешках ревеня не обнаружены, в свекле их количество составляет 863 мг/кг, что не превышает нормируемых (не более 1400 мг/кг). Содержание цезия-137 в корнеплодах, тыквенных и десертных овощах не превышает регламентируемых нормативной документацией значений и составляет менее 6,7 Бк/кг. В исследованных овощах патогенные микроорганизмы, в том числе сальмонеллы, не обнаружены в 25 г. Свекла, брюква, кабачки, тыква и ревень местного произрастания могут находиться в обороте без каких-либо ограничений при соблюдении условий хранений и рекомендаций по использованию (потреблению), установленных производителем. In circulation can is vegetables, appropriate regulatory requirements on chemical, radiation and microbiological safety. Vegetables differ in ability to accumulate foreign, potentially harmful compounds of anthropogenic and natural origin due to the wide use of pesticides, fertilizers, etc. the purpose of the study is to determine the safety of fresh vegetables (zucchini, pumpkins, rutabagas, beets and rhubarb), grown in the Novosibirsk district of the Novosibirsk region. When performing the research, the commonly used test methods were used. As a result it was ascertained, that in vegetables the maintenance of toxic elements does not exceed regulation TR TS 021/2011 «On food safety» standards: cadmium in zucchini, pumpkin, beets, turnips and rhubarb (petioles), respectively 0,0039, 0,013, 0,011, less than 0,005 mg/kg; lead – 0,021, 0,016, 0,015, 0,0044, 0,021 mg/kg; arsenic – less than 0,02 mg/kg (in the petioles of rhubarb – less than 0,04 mg/kg), mercury – less than 0,002 mg/kg In the studied vegetables pesticides (hexachlorocyclohexane (б-, в-, г-isomers) and DDT and its metabolites) not detected at detection limit 0,007 mg/kg. Nitrates in the stalks of rhubarb are not detected in the roots, their number is 863 mg/kg, not to exceed regulated (not more than 1400 mg/kg). The content of cesium-137 in the roots, pumpkin and sweet vegetables does not exceed the regulated standard documentation values, and is less of 6,7 Bq/kg in the studied vegetables with pathogenic microorganisms, including Salmonella not detected in 25 g. Beets, turnips, zucchini, pumpkin and rhubarb local growth may be in circulation without any restrictions at observance of storage conditions and recommendations for use (consumption) established by the manufacturer.

2010 ◽  
Vol 77 (5) ◽  
pp. 1758-1762 ◽  
Author(s):  
K. Zhou ◽  
S. M. George ◽  
A. Métris ◽  
P. L. Li ◽  
J. Baranyi

ABSTRACTSalmonella entericaserovar Typhimurium was grown at salt concentrations ranging from 0.5 to 7.5% in minimal medium with and without added osmoprotectant and in a rich medium. In minimal medium, the cells showed an initial decline period, and consequently the definition of the lag time of the resultant log count curve was revised. The model of Baranyi and Roberts (Int. J. Food Microbiol. 23:277-294, 1994) was modified to take into account the initial decline period, based on the assumption that the log count curve of the total population was the sum of a dying and a surviving-then-growing subpopulation. The lag time was defined as the lag of the surviving subpopulation. It was modeled by means of a parameter quantifying the biochemical work the surviving cells carry out during this phase, the “work to be done.” The logarithms of the maximum specific growth rates as a function of the water activity in the three media differed only by additive constants, which gave a theoretical basis for bias factors characterizing the relationships between different media. Models for the lag and the “work to be done” as a function of the water activity showed similar properties, but in rich medium above 5% salt concentrations, the data showed a maximum for this work. An accurate description of the lag time is important to avoid food wastage, which is an issue of increasing significance in the food industry, while maintaining food safety standards.


2017 ◽  
Vol 20 (K6) ◽  
pp. 87-94
Author(s):  
Son Anh Tran ◽  
Ky Quang Dang

The problem of pesticide residues in vegetables, especially leafy vegetable is the big concern to both customers and exporters. These days, plants, where people use postharvest technologies, are located in Cu Chi, Hoc Mon và Binh Chanh. Due to their simple and obsolete features, those technologies are in need of significant investment with a view to serving manufacture and accommodating customers' demand. This research aims at proposing a fresh vegetables handling process based on elements affecting the process by ultrasonic, micro bubbles and Ozone. The result of research is concentrated on studying, designing and implementing the equipment in line 200 kg/h productivity. It demonstrates an effective combination of cleaning and removing pesticide residues to the extent that is regulated by of Ministry of Health’s Food safety standards.


2019 ◽  
Vol 116 (31) ◽  
pp. 15414-15419 ◽  
Author(s):  
Carlisle E. W. Topping ◽  
Maveric K. I. L. Abella ◽  
Michael E. Berkowitz ◽  
Monica Rouco Molina ◽  
Ivana Nikolić-Hughes ◽  
...  

Radioactive contamination of fruits in the northern Marshall Islands, resulting from the US nuclear weapons testing program in the 1940s and 1950s, is still a human health concern, in particular pertaining to island population resettlement and the economic benefit from farming. Over 200 fruits, primarily coconuts and pandanus, were collected on 11 islands from four atolls in the northern Marshall Islands in 2017. The energy spectra from nuclear gamma decays were measured on a research vessel for each fruit in situ. From these recordings, the level of cesium-137 (137Cs) contamination was determined for individual fruits. Comparisons of the results are made to past studies and international food safety standards. There is a broad distribution of values, ranging from below detectable radiation levels to relatively high levels; safety concerns are largest for Bikini Island. A noticeable fraction of fruits from Bikini have significantly higher levels of 137Cs contamination compared with those from all other measured islands.


2014 ◽  
Vol 687-691 ◽  
pp. 3110-3115
Author(s):  
Gu Li ◽  
Zi Ming Fu ◽  
Jie Feng Yan ◽  
Bing Wen Li ◽  
Zhi Rong Cen

This paper analyzes and studies the definition of the voltage transformer secondary load, examines the practical purposes of the measured values of the voltage transformer secondary load, and presents a variety of testing methods to analyze and compare the differences. This paper gives the test methods of the voltage transformer secondary load when the connection of the voltage transformer is the Y / Y in a three-phase three-wire power supply system, filling the blank of this type of test method in the industry. When other units within the industry carry out such work, the conclusions of this paper are available for reference, and the conclusions of this paper can be referred when drafting relevant regulations in the future.


2010 ◽  
Vol 29 (12) ◽  
pp. 1472-1477 ◽  
Author(s):  
Zachary Maina Gitonga ◽  
Adenirin Chabi-Olaye ◽  
Dagmar Mithöfer ◽  
Julius Juma Okello ◽  
Cecilia Nyawira Ritho

2009 ◽  
Vol 33 (6) ◽  
pp. 573-576 ◽  
Author(s):  
Helen Clifford ◽  
Henry Olszowy ◽  
Megan Young ◽  
John Hegarty ◽  
Matthew Cross

2021 ◽  
Vol 2 (4) ◽  
Author(s):  
Behnam Pourdeyhimi ◽  
Simon Schick ◽  
Robert Groten ◽  
Hooman Vahedi Tafreshi

The shortage of medical masks and respirators led to an explosion of cloth mask offerings.  In the absence of any regulatory requirements, and appropriate guidance, the medical masks vary greatly in their performance and have become more of a fashion item.    We review the filtration mechanisms and test methods and show data on common offerings.  Almost exclusively, the data suggest that cloth masks do not offer much of a protection, and many are poorly designed with only the pressure drop and fogging in mind; these compromise the performance of the entire mask. While cloth masks do not offer significant respiratory protection, it is still critical that masks are worn during pandemics regardless in that they do reduce the number of aerosols expelled by the wearer.


2017 ◽  
Vol 6 (5) ◽  
pp. 41
Author(s):  
Nguessan Elise ◽  
Cisse Mohamed ◽  
Niyonzima Eugene ◽  
Sindic Marianne

Very popular in Belgium, rice tart is a hot pastry sold in bakeries. It is then consumed at home, for dessert or snack. This study is conducted to investigate the microbiological stability of this foodstuff, from the end of baking to end user by consumers. In this purpose, 108 rice tart samples were collected from each of seven bakeries in five Belgium provinces. Physico-chimical analysis in addition to microbiological analysis were carried out in accordance with the European Regulation EC 2073/2005 and with references methods, to enumerate the total microorganisms count, Staphylococcus aureus, Bacillus cereus as well as Enterobacteria, susceptible likely to contaminate the tarts during the production or after baking. Even when the results meet the microbiological safety standards immediately after baking in all bakeries implicated, a significant (p <0,05) increase of mesophilic aerobic bacteria (ranging from <1 to 7 log cfu/g) and B. cereus (> 3,7 log cfu/g) was observed during the storage at nonrefrigerated temperature (28 to 30°C). A post-baking recontamination and other parameters like an insufficient baking time or a non uniform distribution of the oven heat could explain the observed bacteria growth. The present study shows that most rice tarts investigated are microbiologically safe. However, the possible increase of bacteria load in this foodstuff attributable to the favorable aw, pH and temperature conditions, highlight the importance of applying good hygienic practices and compliance with storage conditions after baking to ensure consumer safety. 


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