In solution stability of organic peroxides

Organic peroxides are compounds possessing one or more oxygen&#8211;oxygen bonds. They are derivatives of hydrogen peroxide (H2O2), in which one or both hydrogens are replaced by a group containing carbon. This kind of compounds are ubiquitous in the environment being detected in Secondary Organic Aerosols (SOA)1,2, rainwater, and cloud water3,4. The role of peroxides is very important from health and climate perspectives5, and to understand the mechanism of SOA formation6. It is known that they can easily decompose to form H2O2 and other products7. However, the decomposition processes for organic peroxides have not been studied in a systematic way that allow to stablish improved strategies for sampling and storage of the samples. Moreover, these processes would happen in the atmosphere and need to be included in atmospheric models.The aim of this work is to study the decomposition rate at different temperatures of hydroperoxides formed in the aqueous solution of some atmospherically relevant organic compounds with ozone. Iodometric method is used to monitor the total peroxides concentration. The implications related to sampling and storage for atmospheric samples containing organic peroxides are discussed together with the atmospheric impact of the studied processes.&#160;&#160;&#160;&#160;&#160;&#160;REFERENCES:&#160; &#160; 1. Mutzel, A., L. Poulain, T. Berndt, Y. Iinuma, M. Rodigast, O. B&#246;ge, S. Richters, G. Spindler, M. Sipila, T. Jokinen, et al. 2015. Environ. Sci. Technol. 2015, 49 (13):7754&#8211;61. ; 2. Kristensen, K., &#197;. K. Watne, J. Hammes, A. Lutz, T. Pet&#228;j&#228;, M. Hallquist, M. Bilde, and M. Glasius. Environ. Sci. Technol. Lett. 2016, 3 (8):280&#8211;5; 3. Kelly, T.J., Daum, P.H. and S.E. Schwartz. J. Geophysical Research. 1985, 90(D5), 7861-7871; 4. Huang, S., Fuse, Y., Yamda, E. and Kagaku, B. Bunseki Kagaku. 2004, 53(9), 875-881; 5. Tao, F.; Gonzalez-Flecha, B.; Kobzik, L. Free Radical Biol. Med. 2003, 35, 327&#8722;340; 6.Seinfeld, J. H.; Pandis, S. N. Atmospheric Chemistry and Physics: From Air Pollution to Climate Change, 3rd ed.; John Wiley & Sons: Hoboken, NJ, 2016; 7. Badali, K.M., Zhou, S., Aljawhary, D., Anti&#241;olo, M., Chen, W.J., Lok, A., Mungall, Wong, E., J. P. S., Zhao, R. and Abbatt, J.P.D. Atmos. Chem. Phys., 2015, 15, 7831&#8211;7840.

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THE ROLE OF ANTHROPONYMS IN THE SEMANTIC FIELD OF ARTISTIC WORKS

Naukovy Visnyk of South Ukrainian National Pedagogical University named after K D Ushynsky Linguistic Sciences ◽

10.24195/2616-5317-2019-29-6 ◽

2019 ◽

Vol 2019 (29) ◽

pp. 66-77

Author(s):

Lidiya Derbenyova

Keyword(s):

Literary Work ◽

Main Theme ◽

Semantic Field ◽

New Meanings ◽

Minor Part ◽

The One ◽

A Minor ◽

And Storage ◽

Horizon Of Expectations

The article explores the role of antropoetonyms in the reader’s “horizon of expectation” formation. As a kind of “text in the text”, antropoetonyms are concentrating a large amount of information on a minor part of the text, reflecting the main theme of the work. As a “text” this class of poetonyms performs a number of functions: transmission and storage of information, generation of new meanings, the function of “cultural memory”, which explains the readers’ “horizon of expectations”. In analyzing the context of the literary work we should consider the function of antropoetonyms in vertical context (the link between artistic and other texts, and the groundwork system of culture), as well as in the context of the horizontal one (times’ connection realized in the communication chain from the word to the text; the author’s intention). In this aspect, the role of antropoetonyms in the structure of the literary text is extremely significant because antropoetonyms convey an associative nature, generating a complex mechanism of allusions. It’s an open fact that they always transmit information about the preceding text and suggest a double decoding. On the one hand, the recipient decodes this information, on the other – accepts this as a sort of hidden, “secret” sense.

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The role of lipid metabolism and signalling during postharvest treatment and storage of horticultural crops

Stewart Postharvest Review ◽

10.2212/spr.2008.3.7 ◽

2008 ◽

Vol 4 (3) ◽

pp. 1-8

Author(s):

Fernando Alferez

Keyword(s):

Lipid Metabolism ◽

Horticultural Crops ◽

Postharvest Treatment ◽

And Storage

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Effect of Temperature during Drying and Storage of Dried Figs on Growth, Gene Expression and Aflatoxin Production

Toxins ◽

10.3390/toxins13020134 ◽

2021 ◽

Vol 13 (2) ◽

pp. 134

Author(s):

Ana Isabel Galván ◽

Alicia Rodríguez ◽

Alberto Martín ◽

Manuel Joaquín Serradilla ◽

Ana Martínez-Dorado ◽

...

Keyword(s):

Gene Expression ◽

Aflatoxin Production ◽

Effect Of Temperature ◽

Mycotoxin Production ◽

Industrial Processing ◽

Factors Associated ◽

Different Temperatures ◽

Major Producer ◽

Main Factors ◽

And Storage

Dried fig is susceptible to infection by Aspergillus flavus, the major producer of the carcinogenic mycotoxins. This fruit may be contaminated by the fungus throughout the entire chain production, especially during natural sun-drying, post-harvest, industrial processing, storage, and fruit retailing. Correct management of such critical stages is necessary to prevent mould growth and mycotoxin accumulation, with temperature being one of the main factors associated with these problems. The effect of different temperatures (5, 16, 25, 30, and 37 °C) related to dried-fig processing on growth, one of the regulatory genes of aflatoxin pathway (aflR) and mycotoxin production by A. flavus, was assessed. Firstly, growth and aflatoxin production of 11 A. flavus strains were checked before selecting two strains (M30 and M144) for in-depth studies. Findings showed that there were enormous differences in aflatoxin amounts and related-gene expression between the two selected strains. Based on the results, mild temperatures, and changes in temperature during drying and storage of dried figs should be avoided. Drying should be conducted at temperatures >30 °C and close to 37 °C, while industry processing, storage, and retailing of dried figs are advisable to perform at refrigeration temperatures (<10 °C) to avoid mycotoxin production.

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Effects and Side Effects of Platelet Transfusion

Hämostaseologie ◽

10.1055/a-1347-6551 ◽

2021 ◽

Author(s):

Fabrice Cognasse ◽

Kathryn Hally ◽

Sebastien Fauteux-Daniel ◽

Marie-Ange Eyraud ◽

Charles-Antoine Arthaud ◽

...

Keyword(s):

Side Effects ◽

Immune Responses ◽

Platelet Transfusion ◽

Biological Response ◽

Innate Immune ◽

Innate Immune Responses ◽

Stress Injury ◽

Processing And Storage ◽

And Storage

AbstractAside from their canonical role in hemostasis, it is increasingly recognized that platelets have inflammatory functions and can regulate both adaptive and innate immune responses. The main topic this review aims to cover is the proinflammatory effects and side effects of platelet transfusion. Platelets prepared for transfusion are subject to stress injury upon collection, preparation, and storage. With these types of stress, they undergo morphologic, metabolic, and functional modulations which are likely to induce platelet activation and the release of biological response modifiers (BRMs). As a consequence, platelet concentrates (PCs) accumulate BRMs during processing and storage, and these BRMs are ultimately transfused alongside platelets. It has been shown that BRMs present in PCs can induce immune responses and posttransfusion reactions in the transfusion recipient. Several recent reports within the transfusion literature have investigated the concept of platelets as immune cells. Nevertheless, current and future investigations will face the challenge of encompassing the immunological role of platelets in the scope of transfusion.

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Changes of Physicochemical Properties of Starch Syrups Recommended for Winter Feeding of Honeybees during Storage

Agriculture ◽

10.3390/agriculture11040374 ◽

2021 ◽

Vol 11 (4) ◽

pp. 374

Author(s):

Teresa Szczęsna ◽

Ewa Waś ◽

Piotr Semkiw ◽

Piotr Skubida ◽

Katarzyna Jaśkiewicz ◽

...

Keyword(s):

Chemical Composition ◽

Physicochemical Properties ◽

Physicochemical Parameters ◽

Storage Temperature ◽

Storage Conditions ◽

Different Temperatures ◽

And Storage ◽

Bee Colonies ◽

Temperature Time ◽

Winter Feeding

The aim of this study was to determine the influence of storage temperature and time on physicochemical parameters of starch syrups recommended for the winter feeding of bee colonies. The studies included commercially available three starch syrups and an inverted saccharose syrup that were stored at different temperatures: ca. 20 °C, 10–14 °C, and ca. 4 °C. Physicochemical parameters of fresh syrups (immediately after purchase) and syrups after 3, 6, 9, 12, 15, 18, 21, and 24 months of storage at the abovementioned temperatures were measured. It was observed that the rate of unfavorable changes in chemical composition of starch syrups and the inverted saccharose syrup, mainly the changes in the 5-hydroxymethylfurfural (HMF) content, depended on the type of a syrup and storage conditions (temperature, time). Properties of tested starch syrups intended for winter feeding of bees stored at ca. 20 °C maintained unchanged for up to 6 months, whereas the same syrups stored at lower temperatures (10–14 °C) maintained unchanged physicochemical parameters for about 12 months. In higher temperatures, the HMF content increased. To date, the influence of this compound on bees has not been thoroughly investigated.

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Modeling of magneto-conductivity of bismuth selenide: a topological insulator

SN Applied Sciences ◽

10.1007/s42452-021-04397-8 ◽

2021 ◽

Vol 3 (4) ◽

Author(s):

Yogesh Kumar ◽

Rabia Sultana ◽

Prince Sharma ◽

V. P. S. Awana

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Single Crystal ◽

Single Crystals ◽

X Ray Diffraction ◽

Field Range ◽

X Ray ◽

Bulk Carriers ◽

Different Temperatures

AbstractWe report the magneto-conductivity analysis of Bi2Se3 single crystal at different temperatures in a magnetic field range of ± 14 T. The single crystals are grown by the self-flux method and characterized through X-ray diffraction, Scanning Electron Microscopy, and Raman Spectroscopy. The single crystals show magnetoresistance (MR%) of around 380% at a magnetic field of 14 T and a temperature of 5 K. The Hikami–Larkin–Nagaoka (HLN) equation has been used to fit the magneto-conductivity (MC) data. However, the HLN fitted curve deviates at higher magnetic fields above 1 T, suggesting that the role of surface-driven conductivity suppresses with an increasing magnetic field. This article proposes a speculative model comprising of surface-driven HLN and added quantum diffusive and bulk carriers-driven classical terms. The model successfully explains the MC of the Bi2Se3 single crystal at various temperatures (5–200 K) and applied magnetic fields (up to 14 T).

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