scholarly journals Determination of the Volatile Compounds of Chimonanthus Praecox (Wintersweet) Used as an Ornamental Plant in the Parks of Burdur (Gölhisar)

2021 ◽  
Author(s):  
Sevgin ÖZDERİN ◽  
Ebru Hatice TIĞLI KAYTANLIOĞLU ◽  
Hüseyin FAKİR
Keyword(s):  
Volatile Compounds ◽  
Ornamental Plant ◽  
Chimonanthus Praecox

Rapid Determination of Volatile Compounds Emitted from Chimonanthus praecox Flowers by HS-SPME-GC-MS

2004 ◽  
Vol 59 (9-10) ◽  
pp. 636-640 ◽  
Author(s):  
Chunhui Deng ◽  
Guoxin Song ◽  
Yaoming Hu
Keyword(s):  
Mass Spectrometry ◽  
Volatile Compounds ◽  
Methyl Salicylate ◽  
Rapid Determination ◽  
Benzyl Ester ◽  
Gas Chromatography Mass Spectrometry ◽  
Linalool Oxide ◽  
First Time ◽  
Chimonanthus Praecox

Abstract A novel rapid, simple and solvent-free method was developed for determination of the volatile compounds from the flowers of Chimonanthus praecox Link using headspace solidphase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS). The SPME conditions were firstly optimized and applied to sampling of the volatile compounds emitted from living Chimonanthus praecox L. flowers and excised Chimonanthus praecox L. flowers. Thirty-one compounds emitted from living flowers were identified for the first time, which mainly included 4-methyl-1,3-pentadiene (2.0%), α-phellandrene (4.7%), benzyl methanol (11.1%), trans-linalool oxide (furanyl ring) (5.3%), α-linalool (36.0%), methyl salicylate (24.5%) and acetic acid benzyl ester (5.9%). Comparing the emission from living flowers and excised flowers, twenty-eight compounds were found to be detected in the two emissions, and three compounds, n-pentadecane, n-cetane and n-heptadecane, were only found in the emission from the living flowers, which shows that they might be biomarker compounds.

DETERMINATION OF AROMATIC VOLATILE COMPOUNDS IN PETROCHEMICAL WASTEWATER

2011 ◽  
Vol 10 (8) ◽  
pp. 1081-1085 ◽  
Author(s):  
Elisabeta Chirila ◽  
Simona Dobrinas ◽  
Elena Paunescu ◽  
Gabriela Stanciu ◽  
Camelia Draghici
Keyword(s):  
Volatile Compounds ◽  
Petrochemical Wastewater

Bifunctional Metal Meshes Acting as a Semipermeable Membrane and Electrode for Sensitive Electrochemical Determination of Volatile Compounds

2021 ◽  
Author(s):  
Gabriela F. Giordano ◽  
Vitoria M. S. Freitas ◽  
Gabriel R. Schleder ◽  
Murilo Santhiago ◽  
Angelo L. Gobbi ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Electrochemical Determination ◽  
Semipermeable Membrane ◽  
Metal Meshes

scholarly journals Managing pH of Organic Matrices and New Commercial Substrates for Ornamental Plant Production: A Methodological Approach

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 851
Author(s):  
Sonia Cacini ◽  
Sara Di Lonardo ◽  
Simone Orsenigo ◽  
Daniele Massa
Keyword(s):  
Methodological Approach ◽  
Buffering Capacity ◽  
Ornamental Plant ◽  
Plant Production ◽  
Climatic Chamber ◽  
Step Procedure ◽  
Coir Dust ◽  
Organic Matrices ◽  
Substrate Mixtures

Professional peat-free substrates for ornamental plant production are increasingly required by nursery growers. Most promising materials are green compost, coconut coir dust, and woody fibre, used alone or in mixtures. One of the major concerns is pH, usually higher than optimal. In this work, a method based on a three-step procedure was adopted to acidify three organic matrices alone or in mixtures and to individuate the most suitable product, between iron(II) sulphate 7-hydrate and elemental sulphur chips. Firstly, the determination of the buffering capacity by dilution with sulphuric acid was carried out to determine dosages. Afterwards, an incubation trial of 84 (iron(II) sulphate) or 120 days (sulphur chips) was conducted on matrices and substrate mixtures with calculated doses in a climatic chamber maintained at 21 °C. Iron(II) sulphate resulted not suitable because it caused a rapid, but not lasting, pH lowering and an excessive electrical conductivity (EC) increase. Sulphur chips could instead guarantee an adequate and lasting pH lowering. These results were then validated in the open field trial on matrices and substrates. The proposed acidification methodology could be considered in developing new substrates, but the rapidity of pH acidification and EC increase on plant and mineral nutrition should be further investigated.

scholarly journals Determination of the Chemical Composition of Tea by Chromatographic Methods: A Review

2015 ◽  
Vol 4 (3) ◽  
pp. 56 ◽  
Author(s):  
Alexandr Ya Yashin ◽  
Boris V. Nemzer ◽  
Emilie Combet ◽  
Yakov I. Yashin
Keyword(s):  
Chemical Composition ◽  
Volatile Compounds ◽  
Black Tea ◽  
Storage Conditions ◽  
Organoleptic Evaluation ◽  
Chromatographic Methods ◽  
Tea Quality ◽  
Processing And Storage ◽  
And Storage

<p>Despite the fact that mankind has been drinking tea for more than 5000 years, its chemical composition has been studied only in recent decades. These studies are primarily carried out using chromatographic methods. This review summarizes the latest information regarding the chemical composition of different tea grades by different chromatographic methods, which has not previously been reviewed in the same scope. Over the last 40 years, the qualitative and quantitative analyses of high volatile compounds were determined by GC and GC/MS. The main components responsible for aroma of green and black tea were revealed, and the low volatile compounds basically were determined by HPLC and LC/MS methods. Most studies focusing on the determination of catechins and caffeine in various teas (green, oolong, black and pu-erh) involved HPLC analysis.</p> <p>Knowledge of tea chemical composition helps in assessing its quality on the one hand, and helps to monitor and manage its growing, processing, and storage conditions on the other. In particular, this knowledge has enabled to establish the relationships between the chemical composition of tea and its properties by identifying the tea constituents which determine its aroma and taste. Therefore, assessment of tea quality does not only rely on subjective organoleptic evaluation, but also on objective physical and chemical methods, with extra determination of tea components most beneficial to human health. With this knowledge, the nutritional value of tea may be increased, and tea quality improved by providing via optimization of the growing, processing, and storage conditions.</p>

scholarly journals Gas Chromatographic Determination of some Volatile Compounds in Urine.

1962 ◽  
Vol 16 ◽  
pp. 1289-1290 ◽  
Author(s):  
Roger Bonnichsen ◽  
Maire Linturi ◽  
Anne-Marie Olson ◽  
T. Briggs ◽  
G. A. D. Haslewood ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Chromatographic Determination

scholarly journals Total Water Content of Mainstream Smoke and Sidestream Smoke / Über den Wassergehalt von Haupt- und Nebenstromrauch

1966 ◽  
Vol 3 (5) ◽  
Author(s):  
G. Neurath ◽  
H. Ehmke ◽  
H. Schneemann
Keyword(s):  
Volatile Compounds ◽  
Combustion Process ◽  
Vapour Phase ◽  
Total Water Content ◽  
Mainstream Smoke ◽  
Total Water ◽  
Sidestream Smoke ◽  
Large Water ◽  
Convection Stream

AbstractThe present paper gives a balance of total water (comprising moisture content of tobacco as well as water of combustion) in the smoking of a plain cigarette without filter under standard conditions. 62.8 % of the hydrogen originally present in the burnt portion of the cigarette are transformed into water. The sidestream smoke is enriched by the total water to a large extent, i.e., in proportion to the total water of a cigarette, 14.4 mg of water are calculated to be transferred to the mainstream smoke and 344.7 mg to the sidestream smoke and to the ashes. 14.6 % of the said hydrogen are found to be delivered into the condensates of main and sidestream smoke in the form of slightly volatile compounds containing hydrogen. The residual 22.6 % are transferred into the gas-vapour phase in the form of volatile compounds. The interpretation of temperature measurements made along the axis of and in the space above a freely smouldering cigarette (without drawing) as well as the determination of the velocity (33 cm/sec) of the escaping sidestream smoke indicate the presence of a rapid and steep convection stream over the glowing zone. This finding accounts for the large water enrichment of the sidestream smoke and for the fact that water formed by the combustion process does not contribute to the transfer of steam-volatile substances into the sidestream smoke.

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