Compositions of Bud and Leaf Exudates of Some Populus Species Compared

1992 ◽  
Vol 47 (5-6) ◽  
pp. 329-334 ◽  
Author(s):  
W. Greenaway
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Phenolic Compounds ◽  
The Other ◽  
Gas Chromatography Mass Spectrometry ◽  
Populus Alba ◽  
Leaf Exudate ◽  
Caffeic Acid Esters ◽  
Populus Species ◽  
Acid Esters

Bud and leaf exudates from Populus alba, P. balsamifera, P. nigra and P. tremuloides were analyzed by gas chromatography/mass spectrometry and their components were identified. For three of the four species, P. alba, P. balsamifera and P. nigra, the bud and leaf exudates were similar within each species, though there were marked differences between species. Bud and leaf exudates of P. alba contained only hydrocarbons, those of P. balsamifera contained primarily dihydrochalcones and those of P. nigra contained primarily caffeic acid esters. Bud and leaf exudates of P. tremuloides were different both from each other and from those of the other three species. Bud exudate of P. tremuloides contained a range of phenolic compounds which were largely lacking from the leaf exudate.

Catalytic Pyrolysis of Waste Achyranthes Root Over Al-MCM-41

2021 ◽  
Vol 21 (7) ◽  
pp. 4081-4084
Author(s):  
Seul-Bee Lee ◽  
Young-Min Kim ◽  
Ji-Hui Park ◽  
Young-Kwon Park
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Aromatic Hydrocarbons ◽  
Catalytic Pyrolysis ◽  
The Other ◽  
Gas Chromatography Mass Spectrometry ◽  
Acidic Properties ◽  
Achyranthes Root ◽  
Formation Efficiency ◽  
Mcm 41

This study examined the thermal and catalytic pyrolysis of waste Achyranthes Root (AR) using pyrolyzer-gas chromatography/mass spectrometry (Py-GC/MS). The non-catalytic pyrolysis of waste AR produced various kinds of oxygenates, such as acetic acid, hydroxy propanone, furfural, phenol, cresol, guaiacols, syringols, and so on. By applying nanoporous Al-MCM-41 with acidic properties and mesopores to the pyrolysis of waste AR, the levels of furan and aromatic hydrocarbons production increased with a concomitant decrease in the other oxygenates. The formation efficiency of furans was improved further by increasing the amount of Al-MCM-41 applied to the catalytic pyrolysis of waste AR.

scholarly journals Aroma retention during drying of caja-umbu fruit pulp

2018 ◽  
Author(s):  
Narendra Narain ◽  
Anderson Santos Fontes ◽  
Maria Terezinha Santos Leite-Neta ◽  
Patricia Nogueira Matos ◽  
Hannah Caroline Santos Araújo ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Phenolic Compounds ◽  
Volatile Compounds ◽  
Spray Drying ◽  
Gas Chromatography Mass Spectrometry ◽  
Total Phenolic ◽  
Fruit Pulp ◽  
Total Phenolic Compounds ◽  
Different Temperatures

This study was aimed to obtain and characterize the dried powder of cajá-umbu (Spondias spp) fruit pulp obtained by spray-drying and lyophilization. Spray-drying of the pulp was done at different temperatures. Analysis of bioactive compounds and volatile compounds was performed. The total phenolic compounds content was high in the dried powder obtained at the temperature of 140 °C. The volatiles analysis of dried powders revealed  that the powder dried at  140°C contained a larger number of compounds. The cajá-umbu powder showed that it is a better alternative for storage and conservation since it retained the majority of volatile compounds. Keywords: Cajá-umbu, volatile compounds, gas chromatography, mass spectrometry.

scholarly journals Essential Oil Constituents of Eclipta Prostrata (L.) L. and Vernonia amygdalina Delile

2009 ◽  
Vol 4 (3) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Akinola O. Ogunbinu ◽  
Guido Flamini ◽  
Pier L. Cioni ◽  
Isiaka A. Ogunwande ◽  
Sunday O. Okeniyi
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Stem Bark ◽  
The Other ◽  
Gas Chromatography Mass Spectrometry ◽  
Vernonia Amygdalina ◽  
Straight Chain ◽  
Aerial Parts ◽  
Eclipta Prostrata

The chemical composition of the essential oils from the leaves and stem bark of Eclipta prostrata (L.) L. and the aerial parts of Vernonia amygdalina Delile (Asteraceae) have been analyzed by capillary gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). The investigation led to the identification of 33 and 30 compounds in the oils of the leaves and stem of E. prostrate, respectively, and 40 compounds in the oil of V. amygdalina. While the oil of the leaves of E. prostrata was highly dominated by sesquiterpenoids (89.3%), the stem bark was comprised of sesquiteprenoids (47.7%), straight chain hydrocarbons (25.6%) and monoterpenoids (11.1%). The main constituents of both oils were β-caryophyllene (47.7% and 15.9%) and α-humulene (31.8 and 12.9%) in the leaves and stem, respectively. In addition, ( E)-β-farnesene (10.0%) was also identified in significant amount in the stem bark. On the other hand, the major component of V. amygdalina oil was α-muurolol (45.7%).

THE IN VIVO METABOLISM OF CORTISOL AND CORTICOSTERONE BY THE MACAQUE MONKEY (Macaca fascicularis)

1975 ◽  
Vol 78 (1) ◽  
pp. 91-109 ◽  
Author(s):  
K. D. R. Setchell ◽  
C. H. L. Shackleton
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Adult Female ◽  
Human Urine ◽  
Macaca Fascicularis ◽  
Macaque Monkey ◽  
The Other ◽  
Gas Chromatography Mass Spectrometry ◽  
In Vivo Metabolism

ABSTRACT [4-14C] Cortisol was administered intramuscularly to one adult female macaque monkey, MF3 (Macaca fascicularis). To adult female macaque monkey, MF4, [4-14C]corticosterone was administered intramuscularly. Urine samples were collected and the metabolites excreted identified using gas chromatography, radio-gas chromatography and gas chromatography-mass spectrometry. The principal metabolites of cortisol were identified as glucuronide conjugates of 11-oxygenated-17-oxosteroids. The excretion of tetrahydrocortisol and tetrahydrocortisone relative to the other corticosteroid metabolites was low compared with that of man. Two compounds, 3β-cortol and 3β-cortolone not normally present in human urine were identified in the urine from this species. The principal metabolites of corticosterone were glucuronide conjugates of hexahydroCompound A and hexahydrocorticosterone. Two unidentified radioactive compounds were also present.

Pyrolysis gas-chromatography mass-spectrometry (Py-GC/MS) to identify compression wood in Pinus radiata saplings

Holzforschung ◽  
2014 ◽  
Vol 68 (5) ◽  
pp. 505-517 ◽  
Author(s):  
Maree Brennan ◽  
J. Paul McLean ◽  
Andreas Klingberg ◽  
Clemens Altaner ◽  
Philip J. Harris
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Phenolic Compounds ◽  
Calcium Chloride ◽  
Pinus Radiata ◽  
Compression Wood ◽  
Total Yield ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Products ◽  
Fine Milling

Abstract The potential of pyrolysis followed by gas-chromatography and mass-spectrometry (Py-GC/MS) was investigated for identifying compression wood (CW) in saplings of radiata pine (Pinus radiata) by examining samples of CW and opposite wood (OW). Phenolic compounds and anhydrosugars were identified among the pyrolysis products that provided information about the cell-wall polymers. Sample preparation, such as coarse-milling, fine-milling, and fine-milling followed by calcium-chloride treatment was also investigated. Fine-milling typically decreased the total yield of phenolic compounds compared with coarse-milling. Fine-milling followed by calcium-chloride washing significantly increased the proportions of pyrolysis products from polysaccharides, specifically from (1→4)-β-D-galactans that were of interest in distinguishing CW from OW. Six pyrolysis products were identified that were unique to the CW samples examined, including derivatives of (1→4)-β-D-galactans and H-units of lignin. Other pyrolysis products were identified that had significantly different proportions between the two wood types, and sometimes among samples of the same wood type.

scholarly journals Comparative Study of Dark Beer Before and After Freeze Drying Rehydration Cycle

2018 ◽  
Vol 72 (2) ◽  
pp. 123-127
Author(s):  
Ingmārs Cinkmanis ◽  
Guntis Gailums ◽  
Sanita Vucāne
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Phenolic Compounds ◽  
Organic Acids ◽  
High Performance ◽  
Freeze Drying ◽  
Gas Chromatography Mass Spectrometry ◽  
Before And After

Abstract The aim of the study was to compare dark beer before and after a freeze drying rehydration cycle. The pH, colour, and concentrations of extract, organic acids, and phenolic compounds were determined. Dark beer before and after freeze drying was analysed using standard brewing analysis methods of the Mitteleuropäische Brautechnische Analysenkommision (MEBAK) and two types of chromatography: high-performance liquid chromatography (HPLC) and gas chromatography mass spectrometry (GC/MS). Increase of pH was not observed in dark beer after freeze drying. Dissolved powdered beer in deionised water was clear, dark brown, without sediments, and reproduced the original commercially available dark beer, with original extract substance content 8.88%. Concentrations of the following organic acids were determined: oxalic, tartaric, quinic, malic, ascorbic, lactic, acetic, citric, fumaric, and succinic. Volatile compounds by GC/MS analysis were isolated from dark beer before and after freeze drying.

scholarly journals Terpenes/Terpenoids in Cannabis: Are They Important?

2020 ◽  
Vol 3 (1) ◽  
pp. 25-60
Author(s):  
Lumír Ondřej Hanuš ◽  
Yotam Hod
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Medical Treatment ◽  
Essential Oils ◽  
Cannabis Sativa ◽  
The Other ◽  
Gas Chromatography Mass Spectrometry ◽  
Plant Materials ◽  
Chromatography Mass Spectrometry ◽  
Mass Spectrometry Detector

Cannabis sativa plant has not only cannabinoids as crucial compounds but also the other compounds that play important role as synergistic and/or entourage compound. Cannabis/hemp plant materials and essential oils were analyzed with the help of gas chromatography/mass spectrometry detector for the content of terpenes and terpenoids. The main terpenes/terpenoids and their abundance in the samples were evaluated. Results of this study will be helpful in the next evaluation of these compound in mixture with cannabinoids and their importance in medical treatment.

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