Application of the accelerated storage method for functional dry milk mixtures

В работе приведены результаты исследований сухой молочной смеси функционального назначения, подвергнутой хранению в течение 6 мес при аггравированных температурных режимах (20±2) °С, (35±2) °С, (55±2) °С и при постоянной относительной влажности воздуха 85 %. В результате было отмечено, что применение температуры хранения 55±2 °С позволяет подтвердить заявленный срок годности продукта с учетом коэффициента резерва, так как именно при данной температуре хранения отмечено изменение показателей окислительной порчи, гидролиза белка и органолептических показателей, которые оценивались по дескрипторно-профильному методу согласно ГОСТ ISO 16779-2017. The paper presents the results of studies of a dry milk mixture for functional purposes, stored for 6 months at aggravated temperature conditions (20±2) °C, (35±2) °C, (55±2) °C and at a constant relative air humidity of 85 %. As a result, it was noted that the use of a storage temperature 55±2 °C allows confirming the declared shelf life of the product, taking into account the reserve coefficient, since it is at this storage temperature that a change in indicators of oxidative deterioration, protein hydrolysis and organoleptic indicators, which were assessed by descriptor profile method according to GOST ISO 16779-2017.

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EFFECT OF PASTEURIZATION CONDITIONS, TYPE OF BACTERIA, AND STORAGE TEMPERATURE ON THE KEEPING QUALITY OF UHT-PROCESSED SOFT-SERVE FROZEN DESSERT MIXES1

Journal of Milk and Food Technology ◽

10.4315/0022-2747-34.5.256 ◽

1971 ◽

Vol 34 (5) ◽

pp. 256-259 ◽

Cited By ~ 4

Author(s):

J. H. Martin ◽

P. W. Blackwood

Keyword(s):

Shelf Life ◽

Storage Temperature ◽

Second Phase ◽

Large Numbers ◽

Dry Milk ◽

Frozen Dessert ◽

Dependence of fat acidity value on wheat grain storage conditions

BIO Web of Conferences ◽

10.1051/bioconf/20201700107 ◽

2020 ◽

Vol 17 ◽

pp. 00107

Author(s):

I. A. Kechkin ◽

V. A. Ermolaev ◽

M. V. Ivanov ◽

A. I. Romanenko ◽

E. A. Gurkovskaya

Keyword(s):

Storage Temperature ◽

Storage Period ◽

Acid Value ◽

Storage Conditions ◽

Air Humidity ◽

Wheat Grain ◽

Storage Duration ◽

Long Term Storage ◽

Relative Air Humidity

The article presents the dependence of the fat acidity value (FAV) on the values of humidity and temperature, the relationship between the storage duration for wheat grain and FAV. To establish the expiration date of wheat grain during long-term storage, the author of the article considered the fat acid value (FAV) in mg of KOH. Storage temperature and relative air humidity in a desiccator affect the change (growth) of fat acidity value. The greatest changes occurred at 6th, 7th and 8th months of storage at a relative air humidity of more than 65 % and temperatures above 20 °C. At a storage temperature of 10 °C, in all cases the growth of FAV remained insignificant and was within the limits of determination accuracy. It is noted that when the relative humidity was below 60 %, while the temperature was the same as in the previous case, the FAV of wheat grain was practically unchanged through the 6-month storage period.

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Pendugaan Umur Simpan Tepung Jamur Tiram Putih (Pleurotus ostreatus) Pada Kemasan Plastik Polietilen dengan Metode Akselerasi

Jurnal Penelitian Pertanian Terapan ◽

10.25181/jppt.v19i2.1405 ◽

2020 ◽

Vol 19 (2) ◽

pp. 95

Author(s):

Sussi Astuti ◽

Sri Setyani ◽

Suharyono Suharyono ◽

Muhammad Nurreza Nurreza H

Keyword(s):

Shelf Life ◽

Protein Content ◽

Water Content ◽

Arrhenius Equation ◽

Storage Temperature ◽

Equation Model ◽

Oyster Mushroom ◽

Microsoft Excel ◽

Plastic Packaging ◽

Accelerated Storage

The aim of the research was to determine the shelf life of white oyster mushroom flour in polyethylene plastic packaging with the Arrhenius method. The study was arranged descriptively with two replications. White oyster mushroom flour was stored at three storage temperature conditions, i.e. 30oC, 40oC and 50o C in polyethylene plastic packaging with a thickness of 0.03 mm and stored for one month (28 days). Observations were made on water content, levels of free fatty acids, protein content, flavour and color of white oyster mushroom flour every once a week i.e. on days 0, 7, 14, 21 and 28. The data obtained were used to determine the shelf life of white oyster mushroom flour using acceleration (accelerated storage) method with Arrhenius equation model using Microsoft Excel software. The results showed that the shelf life of white oyster mushroom flour in polyethylene plastic packaging thickness of 0.03 mm using the Arrhenius method was set at a temperature of 30o C based on the parameters of the zero reaction protein content, which was 130.67 days (4.3 months). White oyster mushroom flour in polyethylene plastic packaging thickness of 0.03 mm during storage temperature of 30o C, 40o C, and 50o C tends to decrease protein content, color and aroma, but experience an increase in free fatty acid levels. White oyster mushroom flour in polyethylene plastic packaging at 30o C tends to increase in water content during storage, and decreased water content at 40o C and 50o C.

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Gingerbread with Fruit Filling: Preservation Factor Assessment

Food Processing Techniques and Technology ◽

10.21603/2074-9414-2019-3-397-405 ◽

2019 ◽

Vol 49 (3) ◽

pp. 397-405

Author(s):

Николай Кондратьев ◽

Nikolay Kondratev ◽

Ксения Федорко ◽

Ksenia Fedorko ◽

Эмилия Крылова ◽

...

Keyword(s):

Relative Humidity ◽

Shelf Life ◽

Water Activity ◽

Mass Fraction ◽

Moisture Transfer ◽

Free Water ◽

Air Humidity ◽

Transfer Processes ◽

Relative Air Humidity ◽

Confectionery Products

The ratio of ‘bound’ and ‘free’ water plays an important role in the studies of staling of various baked confectionery products. Gingerbread with fruit filling is a traditional flour confectionery product with intermediate moisture, which causes transfer processes during storage. Temperature, relative humidity, light exposure, mechanical stress, and pressure affect the staling speed of such confectionery products. The shelf life of raw gingerbread was increased from 10–20 days to more than two months, which caused microbiological deterioration during storage. Moisture transfer between the filling and the crumb increases water activity and ruins the capillary structure of gingerbread during storage, thus significantly increasing the risk of microbiological damage. The present research featured the changes in the mass fraction of moisture and water activity of individual parts of raw gingerbread with fruit filling during storage at different temperatures and relative air humidity. The samples were packed in a 40-micron polypropylene film. During storage, the mass fraction of moisture and water activity may change in various parts of the product, which can lead to their molding. In this case, starch degradation processes led to the destruction of the structure and a decrease in the content of mechanically-bound moisture, as well as to the release of ‘free’ water and an increase in water activity. As a result, the risk of molding increased significantly. The water activity increased from 0.71 to 0.79 on the sample surface after six weeks of storage at 30°C and a 40% of equilibrium relative humidity. A set of experiments in microbiological indicators revealed no signs of molding in the freshly prepared samples. After one month of storage, the amount of mold reached 10 CFU/g. The quantity of mesophilic aerobic and facultative anaerobic microorganisms in different parts of the crumb increased from 3×10 to 9×102 CFU/g and in the filling – from 1×10 to 2.3×103 CFU/g. After two months of storage, the amount of mold reached more than 103 COE/g, which greatly exceeds safety norms. As the relative air humidity increased from 30% to 40%, the moisture transfer rate between the products and the environment was reduced by half. As a result, the shelf life decreased by 1–2 weeks. The research also studied the patterns of moisture transfer processes in summer and winter conditions. The research results contribute to the development of technology and shelf life forecasting for complex flour confectionery products with intermediate moisture.

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Visco-elastic changes of vocal fold mucosa related to high and low relative air humidity

Clinical Otolaryngology ◽

10.1046/j.1365-2273.2000.00358-27.x ◽

2000 ◽

Vol 25 (4) ◽

pp. 329-330

Author(s):

R.J.B. Hemler ◽

G.H. Wieneke ◽

P.H. Dejonckere

Keyword(s):

Vocal Fold ◽

Air Humidity ◽

Relative Air Humidity

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Clinical, epidemiological and climatic factors related to the occurrence of cutaneous leishmaniasis in an endemic area in northeastern Brazil

Brazilian Journal of Biology ◽

10.1590/1519-6984.224937 ◽

2020 ◽

Author(s):

R. S. Oliveira ◽

K. B. A. Pimentel ◽

M. L. Moura ◽

C. F. Aragão ◽

A. S. Guimarães-e-Silva ◽

...

Keyword(s):

Cutaneous Leishmaniasis ◽

Climatic Factors ◽

Wide Distribution ◽

Northeastern Brazil ◽

Public Health Issue ◽

Air Humidity ◽

Disease Occurrence ◽

Relative Air Humidity ◽

Age Range ◽

And Control

Abstract Cutaneous leishmaniasis (CL) is a neglected tropical disease with a wide distribution in the Americas. Brazil is an endemic country and present cases in all states. This study aimed to describe the occurrence, the underlying clinical and epidemiological factors, and the correlation of climatic variables with the frequency of reported CL cases in the municipality of Caxias, state of Maranhão, Brazil. This is a retrospective and descriptive epidemiological study based on data extracted from the Brazilian Information System of Diseases Notification, from 2007 to 2017. Maximum and minimum temperature, precipitation, and relative air humidity data were provided by the Brazilian National Institute of Meteorology. A total of 201 reported autochthonous CL cases were analyzed. The predominance of cases was observed in males (70.1%). The age range between 31 and 60 years old was the most affected, with 96 cases (47.9%). Of the total number of registered cases, 38.8% of the affected individuals were engaged in agriculture-related activities. The georeferenced distribution revealed the heterogeneity of disease occurrence, with cases concentrated in the Western and Southern regions of the municipality. An association was detected between relative air humidity (monthly mean) and the number of CL cases per month (p = 0.04). CL continues to be a concerning public health issue in Caxias. In this context, there is a pressing need to strengthen measures of prevention and control of the disease through the network of health services of the municipality, considering local and regional particularities.

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Responses of Rice Growth to Day and Night Temperature and Relative Air Humidity—Leaf Elongation and Assimilation

Plants ◽

10.3390/plants10010134 ◽

2021 ◽

Vol 10 (1) ◽

pp. 134

Author(s):

Sabine Stuerz ◽

Folkard Asch

Keyword(s):

Leaf Area ◽

Leaf Growth ◽

Crop Growth ◽

Air Humidity ◽

Leaf Elongation ◽

Night Temperature ◽

Relative Air Humidity ◽

Leaf Area Expansion ◽

Plant Level ◽

Area Expansion

Predictions of future crop growth and yield under a changing climate require a precise knowledge of plant responses to their environment. Since leaf growth increases the photosynthesizing area of the plant, it occupies a central position during the vegetative phase. Rice is cultivated in diverse ecological zones largely differing in temperature and relative air humidity (RH). To investigate the effects of temperature and RH during day and night on leaf growth, one variety (IR64) was grown in a growth chamber using 9 day/night regimes around the same mean temperature and RH, which were combinations of 3 temperature treatments (30/20 °C, 25/25 °C, 20/30 °C day/night temperature) and 3 RH treatments (40/90%, 65/65%, 90/40% day/night RH). Day/night leaf elongation rates (LER) were measured and compared to leaf gas exchange measurements and leaf area expansion on the plant level. While daytime LER was mainly temperature-dependent, nighttime LER was equally affected by temperature and RH and closely correlated with leaf area expansion at the plant level. We hypothesize that the same parameters increasing LER during the night also enhance leaf area expansion via shifts in partitioning to larger and thinner leaves. Further, base temperatures estimated from LERs varied with RH, emphasizing the need to take RH into consideration when modeling crop growth in response to temperature.

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Pengaruh Perlakuan Waktu dan Suhu Penyimpanan Dingin terhadap Mutu Kubis Bunga (Brassica Oleracea Var. Botrytis L.)

Jurnal BETA (Biosistem dan Teknik Pertanian) ◽

10.24843/jbeta.2020.v08.i01.p17 ◽

2019 ◽

Vol 8 (1) ◽

pp. 138

Author(s):

Chyntia Wulandari Eka Saputri ◽

I. A. Rina Pratiwi Pudja ◽

Pande Ketut Diah Kencana

Keyword(s):

Weight Loss ◽

Shelf Life ◽

Cold Storage ◽

Storage Time ◽

Consumption Rate ◽

Storage Temperature ◽

Treatment Time ◽

O2 Consumption ◽

Damage Level ◽

Four Levels

Tujuan dari penelitian ini adalah untuk menentukan waktu perlakuan optimal dan suhu penyimpanan dingin untuk mutu kubis bunga. Penelitian ini menggunakan rancangan acak lengkap (RAL) yang terdiri dari dua faktor, faktor pertama adalah suhu yang digunakan dan faktor kedua adalah waktu selama show case. Faktor pertama terdiri dari dua level, yaitu (P1): show case temperature 8oC, dan (P2): show case temperature 15oC dan tambah kontrol (P0). Faktor kedua terdiri dari empat level, yaitu (A0): penyimpanan selama 0 jam, (A1): penyimpanan selama 12 jam, (A2): penyimpanan selama 16 jam, (A3): penyimpanan selama 20 jam dan diulang untuk 3 kali ulangan. Kubis bunga sebagai kontrol disimpan pada suhu kamar (28 ± 1 ?). Parameter kualitas yang diamati dalam penelitian ini termasuk penurunan berat badan, tingkat konsumsi O2, warna (warna berbeda), uji organoleptik termasuk umur simpan dan tingkat kerusakan. Hasil penelitian menunjukkan parameter penurunan susut bobot, laju konsumsi O2, warna, umur simpan, tingkat kerusakan pada suhu perlakuan suhu terbaik adalah suhu 8 ? dan waktu penyimpanan 20 jam (P1A3).Kata kunci: kembang kol, waktu penyimpanan, suhu penyimpanan dingin The purpose of this study was to determine the optimal treatment time and cold storage temperature for the quality of cabbage flowers. This study uses a completely randomized design (CRD) consisting of two factors, the first factor is the temperature used and the second factor is the time during the showcase. The first factor consists of two levels, namely (P1): showcase temperature of 8oC, and (P2): showcase temperature of 15oC and added a control (P0). The second factor consists of four levels, namely (A0): storage for 0 hours, (A1): storage for 12 hours, (A2): storage for 16 hours, (A3): storage for 20 hours and repeated for 3 replications. Flower cabbage as control was stored at room temperature (28 ± 1 ?). The quality parameters observed in this study included weight loss, O2 consumption rate, color (color different), organoleptic tests including shelf life and damage level. The results showed the parameters of weight loss, O2 consumption rate, color, shelf life, damage rate at the best temperature of 8 ? and storage time of 20 hours (P1A3). Keywords: cauliflower, storage time, cold storage temperature

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Relationship between preterm birth and air pollution in Santos, Sao Paulo, Brazil

European Journal of Public Health ◽

10.1093/eurpub/ckaa166.111 ◽

2020 ◽

Vol 30 (Supplement_5) ◽

Author(s):

M E L Brandao ◽

B A L F Braga ◽

M L C Martins ◽

P L A A Pereira

Keyword(s):

Air Pollution ◽

Preterm Birth ◽

Air Pollutants ◽

First Trimester ◽

Sao Paulo ◽

São Paulo ◽

Air Humidity ◽

Relative Air Humidity ◽

The Impact ◽

Fourth Quartile

Abstract Santos is a seaboard Brazilian city recognized by its port activity where the road and rail infrastructure along with the large transportation operation, displays an important factor to contribute with all kinds of toxic and air pollutants. Recent studies have suggested associations between air pollution and various birth outcomes. Pollutant gases such as NOx, O3 and particulate matter PM2,5, PM10 have been cited as factors involved in such outcomes. The present study aims to assess the relationship between atmospheric pollutants and perinatal outcomes in the city of Santos from Jan. 2012 to Dec. 2015. Cross-sectional study that analyzed 10.319 singleton births in an area set with 2 km radius of the monitoring stations. Birth weight and information on mother and pregnancy were obtained at the Brazilian “Born Alive National Information System”. Daily records of air pollutants (PM10, PM2.5, NO2 and O3), temperature and relative air humidity, for the study period, were obtained from São Paulo State Environmental Agency (CETESB). Associations between preterm birth and air pollutants mean levels at each gestational trimester were investigated using multiple logistic regression model controlled by the variables: infant sex, type of delivery, maternal education. prenatal care, and number of previous live births, temperature and relative air humidity. NO2 e PM2,5 was not associated with preterm birth. O3 was significantly associated in the first trimester in the fourth quartile (OR = 1,47 CI 95% 1,05; 2,07). PM10 was significantly associated in the first trimester for the fourth quartile (OR = 1,28 CI 95% 1,00; 1,64), second trimester for the second quartile (OR = 1,37 CI 95% 1,07; 1,77). Conclusions the results shows evidence that maternal exposure to air pollution especially during the first trimester of pregnancy may contribute to preterm birth. Further actions are needed towards controlling air pollution are strongly recommended for promoting early-life health. Key messages This is the first research of this kind that was made in Santos. It brings important evidence of the impact in the life of the population, especially those whose is not even born yet. It can be used as a resource to guide public policies in health, especially the guidelines that dictate the concentration of air pollutants and air quality.

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Oxidation Kinetics of Hazelnut Shelf-Life Prediction Model

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.200.466 ◽

2012 ◽

Vol 200 ◽

pp. 466-469

Author(s):

Wen Li Dong ◽

Xue Gong ◽

Jing Dong ◽

Ling Jin ◽

Yu Xiang Wei

Keyword(s):

Prediction Model ◽

Shelf Life ◽

Peroxide Value ◽

Storage Temperature ◽

Order Kinetic ◽

Shelf Life Prediction ◽

Changing Patterns ◽

Kinetics Of ◽

Life Prediction Model

The changing patterns of filbert peroxide value through the determination of different storage temperature conditions,research the dynamics characteristics of oxidative rancidity of filbert. By regression analysis base on the storage time and the logarithm of peroxide value,it concluded the grease oxidation reaction first-order kinetic equation of filbert.Using Arrhenius equation and Q10 model for 5 ~ 35 °C temperature within the shelf life of any temperature prediction model.

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