Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Janis Rizikovs"'
Autor:
Laura Andze, Sanita Vitolina, Rudolfs Berzins, Janis Rizikovs, Daniela Godina, Arturs Teresko, Solveiga Grinberga, Eduards Sevostjanovs, Helena Cirule, Edgars Liepinsh, Aigars Paze
Publikováno v:
Plants, Vol 13, Iss 1, p 145 (2024)
Birch outer bark extract (BBE), containing pentacyclic triterpenes such as betulin, lupeol, and betulinic acid, is a widely recognized natural product renowned for its diverse pharmacological effects. However, its limited water solubility restricts i
Externí odkaz:
https://doaj.org/article/f4052903aace41e793b0c1165ca05bf9
Autor:
Beate Beatrise Bruvere, Anda Gromova, Maksims Jurinovs, Oskars Platnieks, Ja̅nis Rižikovs, Aigars Pa̅že, Daniela Godiņa, Inese Mieriņa, Ivo Heinmaa, Krisjanis Smits, Vita̅lijs Rjabovs, Sergejs Gaidukovs
Publikováno v:
ACS Omega, Vol 9, Iss 42, Pp 42786-42798 (2024)
Externí odkaz:
https://doaj.org/article/25dc427cef2b4f46abf671157b979e3e
Publikováno v:
Materials; Volume 15; Issue 17; Pages: 5872
The necessity for the reduction in greenhouse gas emissions, the growing demand for the improvement of biorefinery technologies, and the development of new biorefining concepts oblige us as a society, and particularly us, as scientists, to develop no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::226a10ab7046a4dee8612360bb78c46b
Publikováno v:
Holzforschung. 75:908-916
This study investigated the effect of phenol-formaldehyde (PF) resin treatment on the dimensional stability of birch solid wood and plywood. Therefore, three different low molecular weight PF resins with average molecular weights (M w ) of 292, 528,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81d38cf1dd0a96a1ea8987f57f38c49d
https://doi.org/10.1515/hf-2020-0235
https://doi.org/10.1515/hf-2020-0235
Publikováno v:
Polymers; Volume 14; Issue 11; Pages: 2304
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://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd750f8e4ac5cd11c1e3b47b1eb8ddc6
https://pubmed.ncbi.nlm.nih.gov/35683976
https://pubmed.ncbi.nlm.nih.gov/35683976
Autor:
Rudolfs Berzins, Inguss Virsis, Raimonds Makars, Maris Puke, Daniela Godiņa, Janis Rizikovs, Kristaps Stankus, Aigars Paze
Publikováno v:
Key Engineering Materials. 850:3-8
The effects on birch outer bark (BOB) ethanolic extractives’ chemical composition after recrystallization with C2–C5 alkanols were studied in this paper. Ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and 1-pentanol were used as solvents.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d4677ca60c3aef94c1fb5032fa5946b
https://doi.org/10.4028/www.scientific.net/kem.850.3
https://doi.org/10.4028/www.scientific.net/kem.850.3
Autor:
Janis Rizikovs, Daniela Godina, Raimonds Makars, Aigars Paze, Arnis Abolins, Anda Fridrihsone, Kristine Meile, Mikelis Kirpluks
Publikováno v:
Polymers
Polymers; Volume 13; Issue 24; Pages: 4380
Polymers, Vol 13, Iss 4380, p 4380 (2021)
Polymers; Volume 13; Issue 24; Pages: 4380
Polymers, Vol 13, Iss 4380, 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://explore.openaire.eu/search/publication?articleId=doi_dedup___::c765c3f2b6abf21a1206b90b92189e05
https://pubmed.ncbi.nlm.nih.gov/34960931
https://pubmed.ncbi.nlm.nih.gov/34960931
Publikováno v:
Polymers
Polymers, Vol 13, Iss 1816, p 1816 (2021)
Volume 13
Issue 11
Polymers, Vol 13, Iss 1816, p 1816 (2021)
Volume 13
Issue 11
From birch wood, it is possible to obtain both acetic acid and 2-furaldehyde as valuable value-added products. The main objective of this study was to develop a new wasteless technology for obtaining 2-furaldehyde, acetic acid, and lignocellulose (LC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ad1d55c713924631b118bf542b3eebb
https://pubmed.ncbi.nlm.nih.gov/34072843
https://pubmed.ncbi.nlm.nih.gov/34072843
Publikováno v:
Polymers, Vol 13, Iss 175, p 175 (2021)
Polymers
Volume 13
Issue 2
Polymers
Volume 13
Issue 2
This study investigated the effect of phenol-formaldehyde (PF) resin treatment on the weathering stability and biological durability of birch plywood. Silver birch (Betula pendula) veneers were vacuum-pressure impregnated with four different PF resin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29fa03afa23bca921cf097f6fb669441
https://doi.org/10.3390/polym13020175
https://doi.org/10.3390/polym13020175