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1.
Polymer Films of
Poly-3-hydroxybutyrate Synthesized byCupriavidus necatorfrom Different Carbon Sources / E. Shishatskaya, I. Nemtsev, A. Lukyanenko [et al.]> // J. Polym. Environ. - 2021. -
Vol. 29
. - P. 837-850,
DOI
10.1007/s10924-020-01924-3. - Cited References: 54. - The reported study was funded by RFBR and KKRF Grant No. 19-43-240012 "Biological and physical principles of production of new generation biomaterials". The work was carried out as part of the State Assignment of the Ministry of Education and Science of the Russian Federation No. FSRZ-2020-0006. The authors would like to express their special thanks to Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS" for providing equipment to ensure the accomplishment of this project . - ISSN 1566-2543. - ISSN 1572-8919
Перевод заглавия:
Полимерные пленки Поли-3-гидроксибутирата, синтезированные некатором Cupriavidus из различных источников углерода
РУБ
Engineering, Environmental + Polymer Science
Рубрики:
CHEMOMECHANICAL PROPERTIES
RALSTONIA-EUTROPHA
SURFACE
-
ROUGHNESS
Кл.слова (ненормированные):
Degradable P(3HB)
--
Various carbon substrates
--
Films
--
Structure
--
Properties
--
NIH 3T3 fibroblasts
Аннотация:
Films were prepared from 2% solutions of biodegradable poly-3-hydroxybutyrate [P(3HB)] and investigated. The polymer was synthesized by the Cupriavidus necator B-10646 bacterium cultivated using various carbon sources (glucose and glycerol of different degrees of purity, containing 0.3 to 17.93% impurities). Glycerol as the substrate influenced molecular-weight properties and crystallinity of the polymer without affecting its temperature characteristics. The P(3HB) specimens synthesized from glycerol had reduced Mw (300–400 kDa) and degree of crystallinity (50–55%) compared to the specimens synthesized from glucose (860 kDa and 76%, respectively). The low-crystallinity P(3HB) specimens, regardless of the degree of purity of glycerol, produced a beneficial effect on the properties of polymer films, which had a better developed folded
surface
and increased hydrophilicity. The values of the highest
roughness
(Ra) of the films synthesized from glycerol were 1.8 to 4.0 times lower and the water angles 1.4–1.6 times smaller compared to the films synthesized from glucose (71.75 nm and 87.4°, respectively). Those films performed better as cell scaffolds: the number of viable NIH fibroblasts was 1.7–1.9 times higher than on polystyrene (control) or films of P(3HB) synthesized from glucose.
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Держатели документа:
Siberian Fed Univ, 79 Svobodnyi Av, Krasnoyarsk 660041, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Inst Biophys, Krasnoyarsk, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, LV Kirenskii Inst Phys, Krasnoyarsk, Russia.
Доп.точки доступа:
Shishatskaya, Ekaterina; Nemtsev, I. V.; Немцев, Иван Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Kiselev, Evgeniy; Sukovatyi, Aleksey; Volova, Tatiana; RFBRRussian Foundation for Basic Research (RFBR); KKRF [19-43-240012]; Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [FSRZ-2020-0006]
}
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2.
Evaluating an improved
parameterization of the soil emission in L-MEB / J. P. Wigneron [et al.]> // IEEE Trans. Geosci. Remote Sensing. - 2011. -
Vol. 49
,
Is. 4
. - P. 1177-1189,
DOI
10.1109/TGRS.2010.2075935. - Cited References: 26 . - ISSN 0196-2892
Рубрики:
BAND MICROWAVE EMISSION
SURFACE
-
ROUGHNESS
1.4 GHZ
MODEL
MOISTURE
LAND
RADIOMETER
FREQUENCY
FIELDS
SPACE
Кл.слова (ненормированные):
Microwave remote sensing
--
radiometry
--
roughness
--
soil moisture (SM)
--
Soil Moisture and Ocean Salinity (SMOS)
--
soil
surface
Аннотация:
In the forward model [L-band microwave emission of the biosphere (L-MEB)] used in the Soil Moisture and Ocean Salinity level-2 retrieval algorithm, modeling of the
roughness
effects is based on a simple semiempirical approach using three main "
roughness
" model parameters: H-R, Q(R), and N-R. In many studies, the two parameters Q(R) and N-R are set to zero. However, recent results in the literature showed that this is too approximate to accurately simulate the microwave emission of the rough soil surfaces at L-band. To investigate this, a reanalysis of the PORTOS-93 data set was carried out in this paper, considering a large range of
roughness
conditions. First, the results confirmed that Q(R) could be set to zero. Second, a refinement of the L-MEB soil model, considering values of N-R for both polarizations (namely, N-RV and N-RH), improved the model accuracy. Furthermore, simple calibrations relating the retrieved values of the
roughness
model parameters H-R and (N-RH - N-RV) to the standard deviation of the
surface
height were developed. This new calibration of L-MEB provided a good accuracy (better than 5 K) over a large range of soil
roughness
and moisture conditions of the PORTOS-93 data set. Conversely, the calibrations of the
roughness
effects based on the Choudhury approach, which is still widely used, provided unrealistic values of
surface
emissivities for medium or large
roughness
conditions.
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Correction
Evaluating an improved parameterization of the soil emission in L-MEB [Текст] : Correction (2011, Vol. 49, P. 1177) / J. P. Wigneron [et al.] // IEEE Trans. Geosci. Remote Sensing : IEEE-Institute Electrical and Electronics Engineers, 2013. - Vol. 51 Is. 5.- P.3200-3200
Доп.точки доступа:
Wigneron, J. P.; Chanzy, A.; Kerr, Y. H.; Lawrence, H.; Shi, J. C.; Escorihuela, M. J.; Mironov, V. L.; Миронов, Валерий Леонидович; Mialon, A.; Demontoux, F.; de Rosnay, P.; Saleh-Contell, K.; Workshop on Remote Sensing and Modeling of
Surface
Properties (2nd ; Jun 09-11, 2009 ; Toulouse, France)
}
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