Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Raimonds Makars"'
Autor:
Galia Shulga, Janis Rizhikovs, Brigita Neiberte, Anrijs Verovkins, Sanita Vitolina, Talrits Betkers, Raimonds Makars
Publikováno v:
Forests, Vol 14, Iss 9, p 1906 (2023)
In the last two decades, there has been increased interest in research focused on developing innovative polymer composite materials for food packaging, obtained by compounding polymers with organic fillers, intended for the manufacture of food storag
Externí odkaz:
https://doaj.org/article/2f8bc363dc944911909e1a055fc031c8
Autor:
Aiga Ivdre, Arnis Abolins, Nikita Volkovs, Laima Vevere, Aigars Paze, Raimonds Makars, Daniela Godina, Janis Rizikovs
Publikováno v:
Polymers, Vol 15, Iss 14, p 3124 (2023)
Developing polyols from biomass sources contributes to a more circular economy by replacing petroleum-based polyols in the vast production of polyurethanes (PUR). One such potential biomass source could be leftover birch bark from which suberinic aci
Externí odkaz:
https://doaj.org/article/5110eb278e5c40339ecfb6da02e0ce5c
Publikováno v:
Molecules, Vol 28, Iss 5, p 2227 (2023)
Suberin is a complex polyester biopolymer, and it is practically impossible to estimate the real content of suberin in suberised plant tissues. This indicates the importance of the development of instrumental analytical methods for the comprehensive
Externí odkaz:
https://doaj.org/article/d944e6f242ea40a49e35dca66906babf
Publikováno v:
Polymers, Vol 14, Iss 11, p 2304 (2022)
The birch (Betula spp.) outer bark is a valuable product rich in betulin. After removal of betulin extractives, suberin containing tissues are left. Suberin is a biopolyester built from α,ω-bifunctional fatty acids (suberinic acids), which after de
Externí odkaz:
https://doaj.org/article/8525165e81734033be245f5ad782ba92
Autor:
Janis Rizikovs, Daniela Godina, Raimonds Makars, Aigars Paze, Arnis Abolins, Anda Fridrihsone, Kristine Meile, Mikelis Kirpluks
Publikováno v:
Polymers, Vol 13, Iss 24, p 4380 (2021)
Global sustainability challenges prompt the world to modify its strategies and shift from a fossil-fuel-based economy to a bio-resources-based one and to the production of renewable biomass chemicals. Depolymerized suberinic acids (SA) were considere
Externí odkaz:
https://doaj.org/article/224af35cf1a3419db34fa9f72e0c6806
Publikováno v:
Materials Science Forum. 1071:182-188
Birch outer bark is a byproduct accumulated from birch tree (Betula pendula Roth. and Betula pubescens Ehrh.) processing and contains up to 50 wt% suberin. Suberin is a biopolyester built mostly from α,ω-bifunctional fatty acids (suberinic acids) w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da50762a7099600d44f5547cf206e10f
https://doi.org/10.4028/p-gxs1x9
https://doi.org/10.4028/p-gxs1x9
Autor:
Daniela Godina, Raimonds Makars, Arnis Abolins, Aigars Paze, Mikelis Kirpluks, Janis Rizhikovs
Publikováno v:
Materials Science Forum. 1071:166-173
Global sustainability challenges prompt the world to modify their strategies and shift from a fossil-fuel-based economy to a bio-resources-based one and to the production of renewable biomass-based chemicals. Different processes exist that allow the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::700d5fb230a21686dade448387a817ec
https://doi.org/10.4028/p-75i7vl
https://doi.org/10.4028/p-75i7vl
Autor:
Aigars Paze, Sanita Vitolina, Rudolfs Berzins, Janis Rizhikovs, Raimonds Makars, Daniela Godina, Arturs Teresko
Publikováno v:
Key Engineering Materials. 933:139-146
The aim of the study was to investigate the effect of process parameters on the production of hydrogels with antisolvent precipitation using unpurified (UB) and purified (PB) birch outer bark betulin powder samples. Experimental activities are focuse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15a9cb33b5839bcda8bf2a6bd130c94a
https://doi.org/10.4028/p-rhk0o3
https://doi.org/10.4028/p-rhk0o3
Autor:
Rudolfs Berzins, Aigars Paze, Sanita Vitolina, Janis Rizhikovs, Raimonds Makars, Daniela Godina, Arturs Teresko
Publikováno v:
Key Engineering Materials. 933:155-161
Application of the adapted methylene blue (MB) adsorption method in determining specific surface area was investigated on particles containing hydrogels obtained from purified (99 wt%) and unpurified (60 wt%) betulin samples. In order to study the ad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5edfc5adabd01b106c385745848304b
https://doi.org/10.4028/p-97n42e
https://doi.org/10.4028/p-97n42e
Autor:
Sanita Vitolina, Aigars Paze, Rudolfs Berzins, Janis Rizhikovs, Raimonds Makars, Daniela Godina, Arturs Teresko
Publikováno v:
Key Engineering Materials. 933:147-154
Dynamic light scattering (DLS) is a well-established technique to analyze particle size in a liquid medium and sample preparation is an essential step of the analysis to obtain reliable data. In this study, the pretreatment of an aqueous suspension c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78d195fce5d8b04c4028df6fbd1805ad
https://doi.org/10.4028/p-30e802
https://doi.org/10.4028/p-30e802