STUDY OF CHEMICAL COMPOSITION OF VOLATILE SUBSTANCES OF PODOPHYLLUM PELTATUM CELLULAR CULTURE

2020 ◽  
Vol 18 (5) ◽  
Author(s):  
M.P. Kitaeva ◽  
Ya.F. Kopytko ◽  
T.A. Fedotcheva
Keyword(s):  
Chemical Composition ◽  
Volatile Substances ◽  
Podophyllum Peltatum ◽  
Cellular Culture

scholarly journals Chemical Composition in Essential Oils of Schefflera octophylla L. Harvested in Hai Duong Province, Vietnam

2020 ◽  
Vol 32 (8) ◽  
pp. 2075-2078
Author(s):  
Tran Quoc Toan ◽  
Pham Quoc Long ◽  
Pham Minh Quan ◽  
Tran Thi Kim Gan ◽  
Luu Van Huyen ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Volatile Components ◽  
Volatile Substances ◽  
Medicinal Properties ◽  
Therapeutic Activities

This study aims to determine the chemical composition of essential oils extracted from Schefflera octophylla L. harvested in Pha Dong commune, Chi Linh district, Hai Duong province, Vietnam. To determine the concentration of volatile components, GC - MS was performed. The results showed that the content of volatile substances occupied 97.07% of essential oils. Some main ingredients having medicinal properties were myrcene (9.0%), cis-β-elemene (6.67%), E-caryophylene (β-caryophylene) (24.91%), α-selinene (6.30%), β-selinene (7.29%). This study opens new potentials in the application of chemical ingredients in the fields of pharmaceuticals, cosmetics, agriculture and in some therapeutic activities.

scholarly journals Etude de l'influence de la pourriture grise des raisins (Botrytis cinerea) sur la composition chimique et la qualité des vins

OENO One ◽  
1976 ◽  
Vol 10 (4) ◽  
pp. 427
Author(s):  
Alain Bertrand ◽  
Rosella Pissard ◽  
Ch. Sarre ◽  
Jean-Claude Sapis
Keyword(s):  
Acetic Acid ◽  
Chemical Composition ◽  
Botrytis Cinerea ◽  
Significant Variation ◽  
Research Programme ◽  
Phase Gazeuse ◽  
Higher Alcohols ◽  
Composition Chimique ◽  
White Wines ◽  
Volatile Substances

<p style="text-align: justify;">Dans le cadre de la recherche de l'influence du taux de pourriture des raisins sur la composition chimique des vins on a effectué, dans six vins rouges et quatre vins blancs, le dosage des polyols et des substances volatiles par chromatographie en phase gazeuse. On constate que les teneurs en acide acétique et en polyols augmentent régulièrement en fonction du taux de pourriture ; par contre, les concentrations en alcools supérieurs et en esters varient de façon non significative.</p><p style="text-align: justify;">+++</p><p style="text-align: justify;">Within a research programme investigating the influence of the level of the grape rot on chemical composition of wines, the concentrations of polyols and volatile substances in six red and four white wines were determined. The concentrations of acetic acid and polyols were found to increase proportionately with the level of grape rot. However, there was a non-significant variation in the concentration of esters and higher alcohols.</p>

scholarly journals Influence du débourbage des moûts et du sulfitage sur les teneurs en substances volatiles des vins et des eaux-de-vie. 1. Etude des vins

OENO One ◽  
1978 ◽  
Vol 12 (1) ◽  
pp. 35
Author(s):  
Alain Bertrand ◽  
C. Marly-Brugerolle ◽  
Ch. Sarre
Keyword(s):  
Gas Chromatography ◽  
Chemical Composition ◽  
Phase Gazeuse ◽  
Composition Chimique ◽  
Volatile Substances

<p style="text-align: justify;">Dans ce travail, on étudie l'influence du débourbage d'un moût d'Ugni Blanc sur la composition chimique des vins et en particulier sur les substances volatiles, dosées par chromatographie en phase gazeuse. Les vins de moût débourbé ont des teneurs en esters plus fortes et des teneurs en alcools supérieurs plus faibles que les vins de moûts non débourbés ce qui correspond à une augmentation de la qualité des vins.</p><p style="text-align: justify;">+++</p><p style="text-align: justify;">In this work, the influence of the settling of an Ugni Blanc must on the chemical composition of wines and in particular on volatile substances is studied, measured by gas chromatography. The wines made from settled must have greater amounts of esters and lower superior alcohol contents than wines made from unsettled must, which corresponds to an increase in the quality of the wines.</p>

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

On the Inhomogeneity of Chemical Composition over the Surface of 21 Per

1976 ◽  
Vol 32 ◽  
pp. 343-349
Author(s):  
Yu.V. Glagolevsky ◽  
K.I. Kozlova ◽  
V.S. Lebedev ◽  
N.S. Polosukhina
Keyword(s):  
Chemical Composition ◽  
Spectral Line ◽  
Variable Star ◽  
Radial Velocities ◽  
Crimean Astrophysical Observatory ◽  
Line Intensities ◽  
Magnetic Variable

SummaryThe magnetic variable star 21 Per has been studied from 4 and 8 Å/mm spectra obtained with the 2.6 - meter reflector of the Crimean Astrophysical Observatory. Spectral line intensities (Wλ) and radial velocities (Vr) have been measured.

Structural Studies on Mitotic Spindle Fibres

1978 ◽  
Vol 36 (3) ◽  
pp. 615-626
Author(s):  
J.R. Mcintosh
Keyword(s):  
Chemical Composition ◽  
Mitotic Spindle ◽  
Structural Studies ◽  
Mitotic Apparatus ◽  
Chemical Studies ◽  
Medical Interest ◽  
Spindle Fibres

The mitotic apparatus is a structure of obvious biological and medical interest, but it has proved to be a difficult cellular machine to understand. The chemical composition of the spindle is only slightly elucidated, largely because of the difficulties in preparing useful isolates of the structure. Chemical studies of the mitotic spindle have been reviewed elsewhere (Mcintosh, 1977), and will not be discussed further here. One would think that structural studies on the mitotic apparatus (MA) in situ would be straightforward, but even with this approach there is some disagreement in the results obtained with various methods and by different investigators. In this paper I will review briefly the approaches which have been used in structural studies of the MA, pointing out the strengths and problems of each approach. I will summarize the principal findings of the different methods, and identify what seem to be fruitful avenues for further work.

Effects of 5-5'-Diphenyl-2-thiohydantoin (DPTH) and Thyroxine on the Ultrastructure and Chemical Composition of Rat Liver

1971 ◽  
Vol 29 ◽  
pp. 570-571
Author(s):  
E. A. Elfont ◽  
R. B. Tobin ◽  
D. G. Colton ◽  
M. A. Mehlman
Keyword(s):  
Chemical Composition ◽  
Rat Liver ◽  
Future Study ◽  
Mode Of Action ◽  
Liver Mitochondria ◽  
Rat Liver Mitochondria ◽  
Effective Inhibitor ◽  
Biochemical Effects ◽  
Glycerophosphate Dehydrogenase ◽  
Stimulation Of

Summary5,-5'-diphenyl-2-thiohydantoin (DPTH) is an effective inhibitor of thyroxine (T4) stimulation of α-glycerophosphate dehydrogenase in rat liver mitochondria. Because this finding indicated a possible tool for future study of the mode of action of thyroxine, the ultrastructural and biochemical effects of DPTH and/or thyroxine on rat liver mere investigated.Rats were fed either standard or DPTH (0.06%) diet for 30 days before T4 (250 ug/kg/day) was injected. Injection of T4 occurred daily for 10 days prior to sacrifice. After removal of the liver and kidneys, part of the tissue was frozen at -50°C for later biocheailcal analyses, while the rest was prefixed in buffered 3.5X glutaraldehyde (390 mOs) and post-fixed in buffered 1Z OsO4 (376 mOs). Tissues were embedded in Araldlte 502 and the sections examined in a Zeiss EM 9S.Hepatocytes from hyperthyroid rats (Fig. 2) demonstrated enlarged and more numerous mitochondria than those of controls (Fig. 1). Glycogen was almost totally absent from the cytoplasm of the T4-treated rats.

Applications of Photoelectron Microscopy

1976 ◽  
Vol 34 ◽  
pp. 506-507
Author(s):  
William J. Baxter
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
Chemical Composition ◽  
Ultraviolet Radiation ◽  
Thin Layer ◽  
Edge Effects ◽  
Electron Optics ◽  
Surface Layers ◽  
Crystalline Orientation ◽  
Fluorescent Screen

In this form of electron microscopy, photoelectrons emitted from a metal by ultraviolet radiation are accelerated and imaged onto a fluorescent screen by conventional electron optics. image contrast is determined by spatial variations in the intensity of the photoemission. The dominant source of contrast is due to changes in the photoelectric work function, between surfaces of different crystalline orientation, or different chemical composition. Topographical variations produce a relatively weak contrast due to shadowing and edge effects.Since the photoelectrons originate from the surface layers (e.g. ∼5-10 nm for metals), photoelectron microscopy is surface sensitive. Thus to see the microstructure of a metal the thin layer (∼3 nm) of surface oxide must be removed, either by ion bombardment or by thermal decomposition in the vacuum of the microscope.

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