Zobrazeno 1 - 10
of 1 652
pro vyhledávání: '"Chiralt, A"'
We propose a unified approach for different exponential perturbation techniques used in the treatment of time-dependent quantum mechanical problems, namely the Magnus expansion, the Floquet--Magnus expansion for periodic systems, the quantum averagin
Externí odkaz:
http://arxiv.org/abs/2401.12955
We propose a framework where Fer and Wilcox expansions for the solution of differential equations are derived from two particular choices for the initial transformation that seeds the product expansion. In this scheme intermediate expansions can also
Externí odkaz:
http://arxiv.org/abs/2401.12952
Publikováno v:
Macromolecular Materials and Engineering, Vol 309, Iss 10, Pp n/a-n/a (2024)
Abstract In this study, two green extraction methods are explored to valorize rice straw into cellulose fibers (CFs), namely subcritical water extraction (SWE) and combined ultrasound‐heating treatment (USHT). The resultant fibers are, thereafter,
Externí odkaz:
https://doaj.org/article/c5f868c3b7f848ddb982f71ffcb58bca
A procedure to numerically integrate non-autonomous linear delay differential equations is presented. It is based on the use of an spectral discretization of the delayed part to transform the original problem into a matrix linear ordinary differentia
Externí odkaz:
http://arxiv.org/abs/2207.09178
Publikováno v:
Carbohydrate Polymer Technologies and Applications, Vol 8, Iss , Pp 100550- (2024)
In this study, cellulose extraction from Posidonia oceanica (PO) waste was studied in order to reduce chemicals in the process, in line with the green chemistry principles. Thus, subcritical water extraction (SWE) was applied to promote the separatio
Externí odkaz:
https://doaj.org/article/4ce6d7b723a8451cbb3ab4bbf202a90e
Publikováno v:
Carbohydrate Polymer Technologies and Applications, Vol 7, Iss , Pp 100491- (2024)
Cellulose fibres from rice straw (RS) were obtained by applying a combined and green process consisting of subcritical water extraction (SWE) (at 160 and 180 °C), followed by bleaching with hydrogen peroxide (H2O2). The bleaching variables were opti
Externí odkaz:
https://doaj.org/article/722c50bfc8b14a91a2ca9ed5e3923325
Publikováno v:
In Science of the Total Environment 20 September 2024 944
Autor:
de Freitas, Pedro Augusto Vieira, Meyer, Silvia, Hernández-García, Eva, Rebaque, Diego, Vilaplana, Francisco, Chiralt, Amparo
Publikováno v:
In Food Chemistry 1 September 2024 451
Autor:
Paula Andrea Gomez-Contreras, Catalina Obando, Pedro Augusto Vieira de Freitas, Laia Martin-Perez, Amparo Chiralt, Chelo Gonzalez-Martinez
Publikováno v:
Molecules, Vol 29, Iss 20, p 4897 (2024)
Of the three types of waste generated in beer processing, brewer’s spent grain (BSG) is the most abundant and has a high potential for valorization. In this work, defatted BSG (DB) was subjected to an extraction process with subcritical water at di
Externí odkaz:
https://doaj.org/article/6400cac853b8445ebae6b79890e82edf
Publikováno v:
In Carbohydrate Polymer Technologies and Applications December 2024 8