Temat: geraniol - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Green method of conversion of geraniol to value-added products in the presence of selected minerals
Autorzy:: Fajdek-Bieda, Anna
Wróblewska, Agnieszka
Perec, Andrzej
Miądlicki, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/2204146.pdf
Data publikacji:: 2023
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: halloysite
mironekuton
geraniol
linalool
thumbergol
Opis:: The study presents the results of research on the process of geraniol (GA) transformation in the presence of natural minerals: montmorillonite, mironekuton, halloysite and also in the presence of halloysite modified with 0.1 M water solution of H2SO4. To obtain information on the structure of the used catalysts, instrumental studies were performed (SEM, XRD, FT-IR, XRF, BET). The second part of the research consisted in examining the influence of individual parameters (temperature, catalyst content, and reaction time) on the course of GA transformation process. The syntheses were carried out without the application of solvent and under atmospheric pressure. To determine the most beneficial process conditions, two functions were selected: GA conversion and selectivity of GA. The proposed method of GA transformation on such minerals: montmorillonite, mironekuton, halloysite, has not been described in the literature so far.
Źródło:: Polish Journal of Chemical Technology; 2023, 25, 1; 47--60
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Isolation of citronellal and geraniol from citronella (Cymbopogon winterianus) oil by vacuum fractional distillation: Effect of operating conditions on the separation
Autorzy:: Le, Minh-Trung
Vu, Duc-Phuong
Nguyen, Thanh Ngoc
Le, Xuan-Tien
Powiązania:: https://bibliotekanauki.pl/articles/27315670.pdf
Data publikacji:: 2023
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: citronellal
geraniol
vacuum
fractional distillation
citronella oil
Opis:: This study used fractional distillation to separate citronellal and geraniol from citronella (Cymbopogon winterianus) essential oil to improve their market value. The one-factor-at-a-time methodology investigated operating parameters’ optimum conditions and effects, including system pressure, packing types, and column height. All investigations were evaluated based on their main fraction’s citronellal and geraniol content and recovery. Regarding the effect of the variables, a higher system pressure improved the separation while increasing the temperature range of each fraction and distillation time. The packing types would also improve the separation by providing a large surface area. Finally, the column height also positively impacted the separation. In the optimum citronella oil fractionation, citronellal content experienced a 2.5-fold increase, from 37.68% to 94.33%. Geraniol purity reached 40.61% from an initial content of 17.33% in the raw CW oil. The distillation could recover up to 90.00% of citronellal and 68.18% of geraniol.
Źródło:: Polish Journal of Chemical Technology; 2023, 25, 4; 67--80
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Prenyl sulfates as alkylating reagents for mercapto amino acids
Autorzy:: Maltsev, Sergey
Sizova, Olga
Utkina, Natalia
Shibaev, Vladimir
Chojnacki, Tadeusz
Jankowski, Wieslaw
Swiezewska, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/1040690.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: cysteamine
geraniol
cysteine
S-prenylation
nerol
lipidated amino acids
Opis:: A new methodology for prenylation of thiol compounds has been developed. The approach is based on the use of prenyl sulfates as new reagents for S-prenylation of benzenethiol and cysteamine in aqueous systems. The C10-prenols geraniol and nerol that differ in the configuration (E or Z, correspondingly) of the α-isoprene unit were efficiently O-sulfated in the presence of a pyridine-SO3' complex. The obtained geranyl and neryl sulfates were tested as alkylating agents. These compounds were chosen to reveal the influence of the α-isoprene unit configuration on their alkylation (prenylation) ability. S-Geranyl cysteine was prepared to demonstrate the applicability of this method for prenylation of peptides containing mercapto amino acids.
Źródło:: Acta Biochimica Polonica; 2008, 55, 4; 807-813
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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