Browsing by Author "Ungureanu, Ovidiu C."

Sort by: Order: Results:

  • Chemical transformations and spectral characterization to Protobind 3000 lignin 
    Ungureanu, Elena; Ariton, Adina-Mirela; Trofin, Alina-Elena; Jităreanu, Carmenica-Doina; Ungureanu, Ovidiu C.; Popa, Valentin I. (“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2018)
    Lignin derivative (the commercial product -Protobind 3000) offered by the Granit Recherche Developement S.A. company, Lausanne-Schwitzerlandwas synthesized from annual plants. The present study’s aim was tomodify ...
  • Design of Functional Polymer Systems to Optimize the Filler Retention in Obtaining Cellulosic Substrates with Improved Properties 
    Ungureanu, Elena; Fortună, Maria-Emiliana; Țopa, Denis-Constantin; Lobiuc, Andrei; Ungureanu, Ovidiu C.; Jităreanu, Carmenica-Doina (MDPI, 2023-02-25)
    In the present work, the possibility of increasing the calcium carbonate (CaCO3) content in sheets of paper to optimize their properties was investigated. A new class of polymeric additives for papermaking is proposed as ...
  • Gravitational analyses applied to protobind 1000 lignin 
    Ungureanu, Elena; Ungureanu, Ovidiu C.; Trofin, Alina-Elena; Ariton, Adina-Mirela; Jităreanu, Carmenica-Doina; Popa, Valentin I. (“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2020)
    Lignin derivative (the commercial product -Protobind 1000) offered by the Granit Recherche Developement S.A. company, Lausanne-Schwitzerlandwas synthesized from annual plants. The ligninstands out by a very large range ...
  • Gravitational sedomentometrical analyses applied to the sarkanda grass lignin 
    Ungureanu, Elena; Ungureanu, Ovidiu C.; Trofin, Alina-Elena; Ariton, Adina-Mirela; Jităreanu, Carmenica-Doina; Popa, Valentin I. (“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2019)
    The lignin stands out by a very large range of applications in extremely various domains. The adsorption-desorption capacity, ion exchange capacity and its catalytic properties are just a few specific ...
  • Lignin derivatives modified by hydroxymethylation and epoxydation reactions 
    Ungureanu, Elena; Jităreanu, Carmenica-Doina; Trofin, Alina-Elena; Ungureanu, Ovidiu C.; Popa, Valentin I. (“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2017)
    Lignin derivative (the commercial product -Protobind 2000) offered by the Granit Recherche Developement S.A. company, Lausanne-Schwitzerlandwas synthesized from annual plants. The present study’s aim was tomodify ...
  • Studies on kinetics and adsorption equilibrium of lead and zinc ions from aqueous solutions on Sarkanda grass lignin 
    Ungureanu, Elena; Trofin, Alina-Elena; Trincă, Lucia-Carmen; Ariton, Adina-Mirela; Ungureanu, Ovidiu C.; Fortună, Maria-Emiliana; Jităreanu, Carmenica-Doina; Popa, Valentin I. (Editura Academiei Romane, 2021-06)
    In this study, the adsorption of Pb2+ and Zn2+ ions from aqueous solutions onto lignin obtained from unmodified Sarkanda grass was analyzed. To ensure optimal process conditions, the retention of lead and zinc ions was ...
  • Use of Sarkanda grass lignin as a possible adsorbent for as (III) from aqueous solutions – kinetic and equilibrium studies 
    Ungureanu, Elena; Jităreanu, Carmenica-Doina; Trofin, Alina-Elena; Fortună, Maria-Emiliana; Ungureanu, Ovidiu C.; Ariton, Adina-Mirela; Trincă, Lucia-Carmen; Brezuleanu, Stejărel; Popa, Valentin I. (Editura Academiei Romane, 2022-05-06)
    Considering the negative effects of polluting species on the environment and human health, in particular heavy metals, and the need for efficient use of resources, the present study investigated the adsorption of As (III) ...