Triterpene alcohols from the leaves of Populus tremula

1986 ◽  
Vol 22 (4) ◽  
pp. 487-487 ◽  
Author(s):  
V. I. Roshchin ◽  
O. Yu. Poverinova ◽  
V. A. Raldugin ◽  
V. A. Pentegova
Keyword(s):  
Populus Tremula ◽  
Triterpene Alcohols

RESEARCH ON PREPARATION OF  GAMMA ORYZANOL ANTI-AGING CREAM

2017 ◽  
pp. 15-21
Author(s):  
Thi Minh Nguyet Le ◽  
Thi Kim Lien Phan
Keyword(s):  
Product Quality ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Aging Effect ◽  
Triterpene Alcohols ◽  
Beneficial Effects ◽  
Long Time ◽  
Formulation Parameters ◽  
Rice Water ◽  
Gamma Oryzanol

Background and Objectives: For a long time, Asian women have known to use rice water, rice bran for skin care, lightening dark spots and slowing down the aging process. Gamma Oryzanol, an ester mixture of trans-ferulic acid with phytosterols and triterpene alcohols extracted from rice bran oil, has been shown to have beneficial effects on the skin, especially its antioxidant and anti-aging effect. The aims of this research were to formulate Gamma Oryzanol-loaded anti-aging cream and to evaluate the product quality. Materials and Methods: Gamma Oryzanol was imported from Japan. Some formulation parameters such as emulsifi-ers, performance modifiers were investigated and the product quality was evaluated according to the criteria of drugs and cosmetics. Results: The excipients were chosen including 1% (w/w) of Lunamer with 3% (w/w) of Prolipid as emulsifiers and 8% (w/w) of mango seed butter as a state modifier in the formulation of Gamma Oryzanol anti-aging cream. The cream is ivory-white, thick, smooth, fragrant-smelling and satisfied all criteria of developed specification. Conclusion: The study was successful in the preparation of Gamma Oryzanol anti-aging cream. Key words: Gamma Oryzanol, anti-aging cream, Franz cells.

Carbon and Nitrogen Isotope Composition of the Wood of Pinus sylvestris, Betula pendula and Populus tremula

2020 ◽  
Vol 54 (8) ◽  
pp. 819-824
Author(s):  
P. Yu. Voronin ◽  
V. A. Mukhin ◽  
T. A. Velivetskaya ◽  
A. V. Ignatiev ◽  
Vl. V. Kuznetsov
Keyword(s):  
Pinus Sylvestris ◽  
Betula Pendula ◽  
Isotope Composition ◽  
Nitrogen Isotope ◽  
Populus Tremula ◽  
Carbon And Nitrogen ◽  
Nitrogen Isotope Composition

scholarly journals Overexpression of vesicle-associated membrane protein PttVAP27-17 as a tool to improve biomass production and the overall saccharification yields in Populus trees

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Madhavi Latha Gandla ◽  
Niklas Mähler ◽  
Sacha Escamez ◽  
Tomas Skotare ◽  
Ogonna Obudulu ◽  
...  
Keyword(s):  
Membrane Protein ◽  
Biomass Production ◽  
Enzymatic Saccharification ◽  
Dry Weight ◽  
Populus Tremula ◽  
Transgenic Trees ◽  
Wild Type ◽  
Glucose Yield ◽  
Transgenic Lines ◽  
Wild Type Control

Abstract Background Bioconversion of wood into bioproducts and biofuels is hindered by the recalcitrance of woody raw material to bioprocesses such as enzymatic saccharification. Targeted modification of the chemical composition of the feedstock can improve saccharification but this gain is often abrogated by concomitant reduction in tree growth. Results In this study, we report on transgenic hybrid aspen (Populus tremula × tremuloides) lines that showed potential to increase biomass production both in the greenhouse and after 5 years of growth in the field. The transgenic lines carried an overexpression construct for Populus tremula × tremuloides vesicle-associated membrane protein (VAMP)-associated protein PttVAP27-17 that was selected from a gene-mining program for novel regulators of wood formation. Analytical-scale enzymatic saccharification without any pretreatment revealed for all greenhouse-grown transgenic lines, compared to the wild type, a 20–44% increase in the glucose yield per dry weight after enzymatic saccharification, even though it was statistically significant only for one line. The glucose yield after enzymatic saccharification with a prior hydrothermal pretreatment step with sulfuric acid was not increased in the greenhouse-grown transgenic trees on a dry-weight basis, but increased by 26–50% when calculated on a whole biomass basis in comparison to the wild-type control. Tendencies to increased glucose yields by up to 24% were present on a whole tree biomass basis after acidic pretreatment and enzymatic saccharification also in the transgenic trees grown for 5 years on the field when compared to the wild-type control. Conclusions The results demonstrate the usefulness of gene-mining programs to identify novel genes with the potential to improve biofuel production in tree biotechnology programs. Furthermore, multi-omic analyses, including transcriptomic, proteomic and metabolomic analyses, performed here provide a toolbox for future studies on the function of VAP27 proteins in plants.

scholarly journals Allelopathic effects of leachates of Juglans regia L., Populus tremula L. and juglone on germination of temperate zone cultivated medicinal and aromatic plants

2021 ◽  
Vol 95 (2) ◽  
pp. 431-442
Author(s):  
Péter Zubay ◽  
Jakob Kunzelmann ◽  
András Ittzés ◽  
Éva Németh Zámboriné ◽  
Krisztina Szabó
Keyword(s):  
Current Knowledge ◽  
Juglans Regia ◽  
Agroforestry Systems ◽  
Temperate Zone ◽  
Populus Tremula ◽  
Environmental Benefits ◽  
Allelopathic Effect ◽  
Aromatic Plants ◽  
Medicinal And Aromatic Plants ◽  
Allelopathic Effects

AbstractThe environmental benefits of agroforestry systems are well known. However, current knowledge of potential allelopathic interactions is inadequate. The decrease in soil fertility, the increasingly rhapsodic distribution of precipitation, and the special metabolism and cultivation of medicinal and aromatic plants are all harbingers of medicinal-agroforestry systems. The authors aimed to discover the allelopathic effects of Juglans regia L. and Populus tremula L. on germination of medicinal and aromatic plants cultivated in a temperate zone. Accordingly, an in vitro germination trial was conducted with leachates of these trees and two juglone concentrations. These allelopathic effects were evaluated for germination vigour, germination rate, and total fresh weight of seedlings of twelve different species. A pronounced species specificity was observed in tolerance of seeds and seedlings to the allelopathic effect of Populus and Juglans. In four of the species studied, the allelopathic effect may inhibit germination, but only initially. Poppy and angelica proved to be the most sensitive to the treatments. The following species had relative tolerance to the allelochemicals, so further research under natural conditions is suggested for: Althea officinalis L. (9.34 ± 5.04–68.66 ± 13.62 GR%), Anethum graveolens L. (12.00 ± 2.00–100.00 ± 6.12 GR%), Cannabis sativa L. (72.66 ± 9.02–91.34 ± 1.16 GR%), Dracocephalum moldavica L. (38.00 ± 2.00–80.00 ± 17.44 GR%), Linum usitatissimum L. (44.66 ± 2.00–58.00 ± 3.46 GR%), and Satureja hortensis L. (52.00 ± 28.22–82.00 ± 8.00 GR%). The aim would be to introduce them into agroforestry systems.

The efficiency of nitrogen explosion pretreatment on common aspen – Populus tremula: N2- VS steam explosion

Energy ◽  
2021 ◽  
pp. 119741
Author(s):  
V. Rooni ◽  
N. Sjulander ◽  
A. Cristobal-Sarramian ◽  
M. Raud ◽  
Lisandra Rocha-Meneses ◽  
...  
Keyword(s):  
Steam Explosion ◽  
Populus Tremula

Amines modified fibers obtained from natural Populus tremula and their rapid biosorption of Acid Blue 25

2018 ◽  
Vol 250 ◽  
pp. 423-432 ◽  
Author(s):  
Najeh Tka ◽  
Mahjoub Jabli ◽  
Tawfik A. Saleh ◽  
Ghazwan Ali Salman
Keyword(s):  
Populus Tremula ◽  
Acid Blue 25 ◽  
Acid Blue

Triterpene Alcohols and Sterols in the Seeds of Brassica napus

1978 ◽  
Vol 80 (10) ◽  
pp. 382-386 ◽  
Author(s):  
T. Itoh ◽  
T. Tamura ◽  
T. Matsumoto
Keyword(s):  
Brassica Napus ◽  
Triterpene Alcohols

scholarly journals Genome Sequences of Populus tremula Chloroplast and Mitochondrion: Implications for Holistic Poplar Breeding

PLoS ONE ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. e0147209 ◽  
Author(s):  
Birgit Kersten ◽  
Patricia Faivre Rampant ◽  
Malte Mader ◽  
Marie-Christine Le Paslier ◽  
Rémi Bounon ◽  
...  
Keyword(s):  
Populus Tremula ◽  
Genome Sequences ◽  
Poplar Breeding
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