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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Salmela, Anniina, Kokkonen, Eero, Kulmala, Ilpo, Veijalainen, Anna-Maria, van Houdt, Rob, Leys, Natalie, Berthier, Audrey, Viacheslav, Ilyin, Kharin, Sergey, Morozova, Julia, Tikhomirov, Alexander, Pasanen, Pertti
Заглавие : Production and characterization of bioaerosols for model validation in spacecraft environment
Колич.характеристики :12 с
Коллективы : European Union [263076]
Место публикации : J. Environ. Sci.: SCIENCE PRESS, 2018. - Vol. 69. - С. 227-238. - ISSN 1001-0742, DOI 10.1016/j.jes.2017.10.016. - ISSN 1878-7320(eISSN)
Примечания : Cited References:28. - The research leading to these results has received funding from the European Union Seventh Framework Programme (FP/2007-2013) under grant agreement number 263076 within the BIOSMHARS Project (BIO contamination Specific Modeling in Habitats Related to Space).
Предметные рубрики: INDOOR AIR
MICROBIAL-CONTAMINATION
BUILDING-MATERIALS
FUNGAL
Ключевые слова (''Своб.индексиров.''): bioaerosol--modeling--cfd--spacecraft--fungi--bacteria
Аннотация: This study aimed to evaluate the suitability of two bioaerosol generation systems (dry and wet generation) for the aerosolization of microorganisms isolated from the International Space Station, and to calibrate the produced bioaerosols to fulfill the requirements of computational fluid dynamics model (CFD) validation. Concentration, stability, size distribution, agglomeration of generated bioaerosol and deposition of bioaerosols were analyzed. In addition, the dispersion of non-viable particles in the air was studied. Experiments proved that wet generation from microbial suspensions could be used for the production of well-calibrated and stabile bioaerosols for model validation. For the simulation of the natural release of fungal spores, a dry generation method should be used. This study showed that the used CFD model simulated the spread of non-viable particles fairly well. The mathematical deposition model by Lai and Nazaroff could be used to estimate the deposition velocities of bioaerosols on surfaces, although it somewhat underestimated the measured deposition velocities. (c) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ranjan, Rajeev, Kirillova, Maria A., Esimbekova, Elena N., Zharkov, Sergey M., Kratasyuk, Valentina A.
Заглавие : Agglomeration behavior of lipid-capped gold nanoparticles
Колич.характеристики :11 с
Коллективы : Russian Foundation for Basic Research [16-34-60100]; [0356-2017-0017]
Место публикации : J. Nanopart. Res.: SPRINGER, 2018. - Vol. 20, Is. 4. - Ст.107. - ISSN 1388-0764, DOI 10.1007/s11051-018-4215-5. - ISSN 1572-896X(eISSN)
Примечания : Cited References:35. - The research was supported by the Russian Foundation for Basic Research [project no. 16-34-60100] and the state budget allocated to the fundamental research (project no. 0356-2017-0017). The authors thank Prof. Tatiana Volova, Prof. Evgenia Slyusareva, and Ms. Nina Slyusarenko of the Siberian Federal University for their assistance in the zeta potential and zeta-average analysis.
Предметные рубрики: COLORIMETRIC SENSOR ARRAY
OPTICAL-PROPERTIES
AGGREGATION
CANCER
Ключевые слова (''Своб.индексиров.''): gold nanoparticles--ionic interference--agglomeration--stabilization--lipid capping--nanobiotechnology applications
Аннотация: The current investigation deciphers aggregation pattern of gold nanoparticles (AuNPs) and lipid-treated AuNPs when subjected to aqueous sodium chloride solution with increasing ionic strengths (100-400 nM). AuNPs were synthesized using 0.29 mM chloroauric acid and by varying the concentrations of trisodium citrate (AuNP1 1.55 mM, AuNP2 3.1 mM) and silver nitrate (AuNP3 5.3 mu M, AuNP4 10.6 mu M) with characteristic LSPR peaks in the range of 525-533 nm. TEM analysis revealed AuNPs to be predominantly faceted nanocrystals with the average size of AuNP1 to be 35 +/- 5 nm, AuNP2 15 +/- 5 nm, AuNP3 30 +/- 5 nm, and AuNP4 30 +/- 5 nm and the zeta-average for AuNPs were calculated to be 31.23, 63.80, 26.08, and 28 nm respectively. Induced aggregation was observed within 10 s in all synthesized AuNPs while lipid-treated AuNP2 (AuNP2-L) was found to withstand ionic interferences at all concentration levels. However, lipid-treated AuNPs synthesized using silver nitrate and 1.55 mM trisodium citrate (AuNP3, AuNP4) showed much lower stability. The zeta potential values of lipid-treated AuNPs (AuNP1-L-1x/200, -17.93 +/- 1.02 mV; AuNP2-L-1x/200, -21.63 +/- 0.70; AuNP3-L-1x/200, -14.54 +/- 0.90; AuNP3-L-1x/200 -13.77 +/- 0.83) justified these observations. To summarize, AuNP1 and AuNP2 treated with lipid mixture 1 equals or above 1x/200 or 1x/1000 respectively showed strong resistance against ionic interferences (up to 400 mM NaCl). Use of lipid mixture 1 for obtaining highly stable AuNPs also provided functional arms of various lengths which can be used for covalent coupling.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Joseph, Blessy, Sam, Rubie Mavelil, Balakrishnan, Preetha, Maria, Hanna J., Gopi, Sreeraj, Volova, Tatiana, Fernandes, Susana C. M., Thomas, Sabu
Заглавие : Extraction of Nanochitin from Marine Resources and Fabrication of Polymer Nanocomposites: Recent Advances
Колич.характеристики :37 с
Коллективы : Government of the Russian Federation [074-02-2018-328, 220]; "Investissements d'Avenir" French programFrench National Research Agency (ANR) [ANR-16-IDEX-0002]; Region Nouvelle-AquitaineRegion Nouvelle-Aquitaine; Communaute d'Agglomeration du Pays Basque, France
Место публикации : Polymers: MDPI, 2020. - Vol. 12, Is. 8. - Ст.1664. - ISSN 2073-4360(eISSN), DOI 10.3390/polym12081664
Примечания : Cited References:128. - This study was financially supported by project "Agro preparations of the new generation: a strategy of construction and realization" (agreement number 074-02-2018-328) in accordance with resolution number 220 of the Government of the Russian Federation of 9 April 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning." S.C.M.F. is the recipient of an E2S UPPA Research Partnership Chair (MANTA: Marine Materials) supported by the "Investissements d'Avenir" French program managed by ANR (ANR-16-IDEX-0002), the Region Nouvelle-Aquitaine and the Communaute d'Agglomeration du Pays Basque, France.
Предметные рубрики: NATURAL-RUBBER NANOCOMPOSITES
ELECTROSPUN PVDF MEMBRANE
ALPHA-CHITIN
Аннотация: Industrial sea food residues, mainly crab and shrimp shells, are considered to be the most promising and abundant source of chitin. In-depth understanding of the biological properties of chitin and scientific advancements in the field of nanotechnology have enabled the development of high-performance chitin nanomaterials. Nanoscale chitin is of great economic value as an efficient functional and reinforcement material for a wide range of applications ranging from water purification to tissue engineering. The use of polymers and nanochitin to produce (bio) nanocomposites offers a good opportunity to prepare bioplastic materials with enhanced functional and structural properties. Most processes for nanochitin isolation rely on the use of chemical, physical or mechanical methods. Chitin-based nanocomposites are fabricated by various methods, involving electrospinning, freeze drying, etc. This review discusses the progress and new developments in the isolation and physico-chemical characterization of chitin; it also highlights the processing of nanochitin in various composite and functional materials.
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