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You searched for: Publication year rev 7981-2019 Remove constraint Publication year rev: 7981-2019 Subject term flame ionization Remove constraint Subject term: flame ionization
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1. A nebulizer interface for liquid chromatography - Flame ionization detection: Development and validation

Author:
Christian Becker; Maik A. Jochmann; Thorsten Teutenberg; Torsten C. Schmidt
Source:
Talanta 2019 pp. -
ISSN:
0039-9140
Subject:
1-propanol; butanol; flame ionization; hexanols; ionization; liquid chromatography; pentanols; stainless steel; temperature
Abstract:
... Within this study, a novel liquid chromatography (LC)/flame ionization detector (FID) interface was improved. In contrast to previously published interface concepts, the main nebulizer body and the transfer capillary was made of stainless steel. Previously reported problems such as blocking of the transfer capillary were investigated. The simple design of the here presented nebulizer interface all ...
DOI:
10.1016/j.talanta.2019.120229

2. A novel spot test based on digital images for determination of methanol in biodiesel

Author:
Samara Soares; Kétheny G. Torres; Eduardo L. Pimentel; Patrícia B. Martelli; Fábio R.P. Rocha
Source:
Talanta 2019 v.195 pp. 229-235
ISSN:
0039-9140
Subject:
biodiesel; cameras; color; detection limit; digital images; flame ionization; formaldehyde; fuel production; methanol; mobile telephones; oxalic acid; oxidation; potassium permanganate; transesterification; United States
Abstract:
... Methanol is used in transesterification reaction for biodiesel production, being an important quality parameter to evaluate the purity of the final product. Methanol concentrations higher than 0.20% (m/m) reduce the biofuel efficiency. The Brazilian, United States, and European standards recommend the reference method based on gas chromatography with flame ionization detection, which involves a ti ...
DOI:
10.1016/j.talanta.2018.11.028

3. Aldehydes gas ozonation monitoring: Interest of SIFT/MS versus GC/FID

Author:
Leticia Vitola Pasetto; Valérie Simon; Romain Richard; Jean-Stéphane Pic; Frédéric Violleau; Marie-Hélène Manero
Source:
Chemosphere 2019 v.235 pp. 1107-1115
ISSN:
0045-6535
Subject:
aldehydes; catalytic activity; flame ionization; mass spectrometry; monitoring; ozonation; ozone; silicone; temperature; volatile organic compounds
Abstract:
... Two analytical techniques – online Gas Chromatography coupled with Flame Ionization Detector (often used method for VOCs monitoring) versus Selected Ion Flow Tube coupled with Mass Spectrometry (a more recent technique based on direct mass spectrometry) – were compared in association to an ozone-based gas treatment. Selecting aldehydes as the representative VOCs, their concentrations were monitore ...
DOI:
10.1016/j.chemosphere.2019.06.186

4. An in‐needle solid‐phase microextraction device packed with etched steel wires for polycyclic aromatic hydrocarbons enrichment in water samples

Author:
Ying Yang; Weimei Mai; Jingyi Gao; Zhe Hu; Jianqiao Xu; Shichun Zou
Source:
Journal of separation science 2019 v.42 no.9 pp. 1750-1756
ISSN:
1615-9306
Subject:
adsorbents; detection limit; flame ionization; polycyclic aromatic hydrocarbons; solid phase microextraction; standard deviation; steel; storage time; tap water
Abstract:
... A novel, low‐cost and effective in‐needle solid‐phase microextraction device was developed for the enrichment of trace polycyclic aromatic hydrocarbons in water samples. The in‐needle solid‐phase microextraction device could be easily assembled by inserting hydrofluoric acid‐etched wires, which were used as adsorbent, into a 22‐gauge needle tube within spring supporters. Compared with the commerci ...
DOI:
10.1002/jssc.201801112

5. Analysis of Essential Oils from the Leaf of Phoebe paniculata (Wall. ex Nees) Nees, Leaf and Stem of Phoebe tavoyana (Meissn.) Hook. f. from Vietnam

Author:
Le D. Linh; Pham H. Ban; Do N. Dai; Nguyen V. Hung; Dau B. Thin; Vo T. Dung; Isiaka A. Ogunwande
Source:
Journal of essential oil-bearing plants 2019 v.22 no.1 pp. 231-238
ISSN:
0976-5026
Subject:
Phoebe; alpha-pinene; beta-caryophyllene; essential oils; flame ionization; germacrene; leaves; mass spectrometry; oils; sabinene; spathulenol; Vietnam
Abstract:
... The essential oils obtained from the leaf of Phoebe paniculata (Wall. ex Nees) Nees, as well as the leaf and stem of Phoebe tavoyana (Meissn.) Hook. f. (Lauraceae) were analysed using gas chromatography- flame ionization detector (GC-FID) and gas chromatography coupled with mass spectrometry (GC/MS). The yields of the essential oils were 0.21 % and 0.18 % (v/w) respectively, calculated on dry weig ...
DOI:
10.1080/0972060X.2019.1599735

6. Anti-inflammatory, Analgesic Activity and Toxicity of Two Pelargonium inquinans Ait Essential Oils: Wild and Cultivated

Author:
Babalwa Tembeni; Opeoluwa O. Oyedeji; Christopher N. Manene; Idris A. Oyemitan; Adebola O. Oyedeji
Source:
Journal of essential oil-bearing plants 2019 v.22 no.5 pp. 1252-1264
ISSN:
0976-5026
Subject:
Pelargonium; acetic acid; acute oral toxicity; analgesic effect; analgesics; anti-inflammatory activity; camphor; chemical composition; cytotoxicity; edema; egg albumen; eggs; flame ionization; gas chromatography-mass spectrometry; hydrodistillation; leaves; linalool; nociception; rats; sabinene; toxicity testing; wild plants
Abstract:
... Comparative chemical composition of the essential oils of wild and cultivated P. inquinans fresh leaves and stem was determined and the oils were evaluated for their anti-inflammatory, analgesic and cytotoxicity (acute oral toxicity profile) properties. Fresh leaves and stem of wild and cultivated P. inquinans were hydrodistilled using Clevenger apparatus. The chemical composition of the essential ...
DOI:
10.1080/0972060X.2019.1649989

7. Authentication of Schisandra chinensis and Schisandra sphenantherae in Chinese patent medicines by pyrolysis-gas chromatography/mass spectrometry and fingerprint analysis

Author:
Yilei Huang; Zhongping Huang; Chuichi Watanabe; Lili Wang
Source:
Journal of analytical and applied pyrolysis 2019 v.137 pp. 70-76
ISSN:
0165-2370
Subject:
Schisandra chinensis; chemometrics; flame ionization; fruits; gas chromatography-mass spectrometry; lignans; principal component analysis; pyrolysis; pyrolysis gas chromatography; spectrometers; standard deviation
Abstract:
... Authentication of Schisandra chinensis fruits (S. chinensis fruits) and Schisandra sphenantherae fruits (S. sphenantherae fruits) used in Chinese patent medicines (CPMs) was investigated by pyrolysis-gas chromatography coupled with fingerprint analysis on the basis of the lignan components. 0.3 mg powder of CPM sample was pyrolyzed in a vertical microfurnace pyrolyzer at 400 °C, and the products w ...
DOI:
10.1016/j.jaap.2018.11.011

8. Authentication of the geographical origin of extra-virgin olive oil of the Arbequina cultivar by chromatographic fingerprinting and chemometrics

Author:
Dainis N. Vera; Ana M. Jiménez-Carvelo; Luis Cuadros-Rodríguez; Itziar Ruisánchez; M. Pilar Callao
Source:
Talanta 2019 v.203 pp. 194-202
ISSN:
0039-9140
Subject:
aerosols; chemometrics; cultivars; data collection; extra-virgin olive oil; flame ionization; liquid chromatography; models; multivariate analysis; protected designation of origin; provenance; temperature; Spain
Abstract:
... This paper proposes to use chromatographic fingerprints coupled to multivariate techniques to authenticate the geographical origin of extra-virgin olive oils (EVOO) of the Arbequina botanical variety. This methodology uses the whole or part of the chromatogram as input data for the classification models but does not identify or quantify the chemicals constituents.Arbequina monovarietal EVOOs from ...
DOI:
10.1016/j.talanta.2019.05.064

9. Bio-herbicidal effects of five essential oils on germination and early seedling growth of velvetleaf (Abutilon theophrasti Medik.)

Author:
Marija Sarić-Krsmanović; Jelena Gajić Umiljendić; Ljiljana Radivojević; Ljiljana Šantrić; Ivana Potočnik; Rada Đurović-Pejčev
Source:
Journal of environmental science and health 2019 v.54 no.4 pp. 247-251
ISSN:
1532-4109
Subject:
Abutilon theophrasti; Melissa officinalis; Ocimum basilicum; Salvia officinalis; Solidago virgaurea; Thymus vulgaris; basil; bioassays; essential oils; flame ionization; germination; hydrodistillation; lipid content; mass spectrometry; oils; polysorbates; sage; thyme; weeds
Abstract:
... The evaluation of the inhibition effect exerted by the essential oils of basil (Ocimum basilicum), sage (Salvia officinalis), thyme (Thymus vulgaris), lemon balm (Melissa officinalis) and goldenrod (Solidago virgaurea) on seeds germination and early seedling growth of velvetleaf (Abutilon theophrasti Medik.) weed was examined in a laboratory bioassay. The essential oils were obtained by hydrodisti ...
DOI:
10.1080/03601234.2018.1550309

10. Characterization and Reduction of In-Use CH₄ Emissions from a Dual Fuel Marine Engine Using Wavelength Modulation Spectroscopy

Author:
David E. Sommer; Miayan Yeremi; Jeff Son; Joel C. Corbin; Stéphanie Gagné; Prem Lobo; J. Wayne Miller; Patrick Kirchen
Source:
Environmental science & technology 2019 v.53 no.5 pp. 2892-2899
ISSN:
1520-5851
Subject:
air; flame ionization; gas engines; global warming potential; greenhouse gas emissions; methane; natural gas; spectroscopy; wavelengths
Abstract:
... In-use exhaust stream CH₄ emissions from two dual fuel marine engines were characterized and strategies for CH₄ reduction were identified and evaluated. For this, a low-cost, portable, wavelength modulation spectroscopy (WMS) system was developed. The performance of the developed WMS sensor was assessed using gas standards and demonstrated on a heavy-duty, diesel pilot ignited, direct-injection na ...
DOI:
10.1021/acs.est.8b04244

11. Characterization of natural polymers as functional barriers for cellulose-based packaging materials

Author:
Andrea Walzl; Samir Kopacic; Wolfgang Bauer; Erich Leitner
Source:
Food additives & contaminants 2019 v.36 no.6 pp. 976-988
ISSN:
1944-0057
Subject:
biodegradability; biopolymers; flame ionization; food-packaging materials; gas chromatography-mass spectrometry; gases; high performance liquid chromatography; packaging; prices; recycled paper; recycling
Abstract:
... Cellulose-based packaging materials are currently the most commonly used food packaging materials due to their light weight, stability and affordable price. However, the use of recycled paper and board adds to the risk that undesirable substances migrate into the packed goods, since contaminants are not completely removed during the recycling process and can accumulate in the final product. The on ...
DOI:
10.1080/19440049.2019.1600747

12. Characterization of odour-active volatile compounds of acerola wine

Author:
J.A. Pino; C.E. Quijano-Célis
Source:
Acta alimentaria 2019 v.48 no.3 pp. 306-315
ISSN:
1588-2535
Subject:
acerolas; acids; alcohols; aldehydes; esters; flame ionization; furans; gas chromatography-mass spectrometry; headspace analysis; ketones; odor compounds; odors; solid phase microextraction; terpenoids; wines
Abstract:
... The volatile compounds of acerola wine were isolated by headspace–solid phase microextraction (HS-SPME) and analysed by gas chromatography-flame ionization detector (GC-FID), gas chromatography-mass spectrometry (GC-MS), and gas chromatography-olfactometry (GC-O). The composition of acerola wine included 38 esters, 19 alcohols, 16 acids, 8 terpenes, 5 aldehydes, 5 ketones, 3 furans, and 8 miscella ...
DOI:
10.1556/066.2019.48.3.5

13. Chemical Composition of Essential Oil of Madhuca longifolia var. latifolia (Roxb.) A. Chev. Flowers

Author:
Yogesh Chandrakant Suryawanshi; Digambar Nabhu Mokat
Source:
Journal of essential oil-bearing plants 2019 v.22 no.4 pp. 1034-1039
ISSN:
0976-5026
Subject:
Madhuca longifolia; chemical composition; essential oils; flame ionization; hydrodistillation; odors; sesquiterpenoids
Abstract:
... In the present investigation, the chemical composition of essential oil of Madhuca longifolia var. latifolia (Roxb.) A.Chev. flowers was studied for its aroma compounds. The essential oil was isolated using hydrodistillation method. The chemical composition of isolated essential oil was investigated by using gas chromatography equipped with flame ionization detector (GC) and gas chromatography cou ...
DOI:
10.1080/0972060X.2019.1667879

14. Chemical composition and biological activity of Mentha citrata Ehrh., essential oils growing in southern Algeria

Author:
Hamza Ouakouak; Naima Benchikha; Aicha Hassani; Mohamed L. Ashour
Source:
Journal of food science and technology 2019 v.56 no.12 pp. 5346-5353
ISSN:
0022-1155
Subject:
2,2-diphenyl-1-picrylhydrazyl; Mentha aquatica var. citrata; aerial parts; antioxidant activity; chemical composition; colorectal neoplasms; cytotoxicity; essential oils; flame ionization; free radicals; in vitro studies; leaves; mass spectrometry; microwave treatment; neoplasm cells; secondary metabolites; steam distillation; Algeria
Abstract:
... Three techniques, hydro distillation, steam distillation and microwave-assisted distillation, was used in this work to extract volatile secondary metabolites essential oils (EOs), from the aerial part of Mentha citrata Ehrh., plant (steams, leaves and flowers). The plant material was collected from a location called El-kobna in El-Oued province, southern Algeria during June 2018. The extracted Men ...
DOI:
10.1007/s13197-019-04005-z
PubMed:
31749482
PubMed Central:
PMC6838280

15. Chemical disparity in the oil from leaves of Cinnamomum zeylanicum Blume

Author:
Rajesh K. Joshi
Source:
Flavour and fragrance journal 2019 v.34 no.6 pp. 443-449
ISSN:
0882-5734
Subject:
Cinnamomum verum; acetates; alpha-phellandrene; benzyl benzoate; beta-caryophyllene; biosynthesis; essential oils; eugenol; flame ionization; flowering; gas chromatography-mass spectrometry; hydrodistillation; leaves; linalool; oils; wet season
Abstract:
... The hydrodistilled essential oil obtained from leaves of Cinnamomum zeylanicum Blume (Lauraceae) collected throughout the year was examined using gas chromatography fitted with flame ionization detector (GC‐FID) and gas chromatography connected with mass spectrometry (GC‐MS). The variation in essential oil yield was found to be in the range of 1.1–1.4% (w/w). Between 28 and 40 components, represen ...
DOI:
10.1002/ffj.3524

16. Chemical identification and antimicrobial potential of essential oil of Piper rivinoides kunth (BETIS-WHITE)

Author:
Antonio Linkoln Alves Borges Leal; Antonio Judson Targino Machado; Camila Fonseca Bezerra; Cicero Emerson Serra Inácio; Janaína Esmeraldo Rocha; Débora Lima Sales; Thiago Sampaio de Freitas; Waltécio de Oliveira Almeida; Wanderlei do Amaral; Luiz Everson da Silva; Aurea Portes Ferriani; Beatriz Helena Lameiro de Noronha Sales Maia; Maria Flaviana Bezerra Morais-Braga; Humberto Medeiros Barreto; Henrique Douglas Melo Coutinho
Source:
Food and chemical toxicology 2019 v.131 pp. 110559
ISSN:
0278-6915
Subject:
Candida albicans; Candida tropicalis; Escherichia coli; Piper; Staphylococcus aureus; antagonism; antifungal properties; bacteria; chemical composition; erythromycin; essential oils; flame ionization; fungi; gentamicin; norfloxacin; petroleum; synergism; toxicology
Abstract:
... The family Piperaceae is known for presenting in its species flavoring, healing and antimicrobial properties among others. The objective of the present study was: to study the chemical profile of the essential oil of Piper rivinoides (EOPR); to analyze its anti-bacterial and antifungal potential, as well as to evaluate the antifungal and antibiotic-modifying capacity. The chemical constituents wer ...
DOI:
10.1016/j.fct.2019.06.006

17. Chromatographic Procedure for the Determination of Products of the Direct Synthesis of Dimethyl Ether

Author:
P. V. Samokhin; I. A. Belostotskii; I. I. Marshev; M. A. Kipnis
Source:
Journal of analytical chemistry 2019 v.74 no.Supplement 2 pp. S17
ISSN:
1061-9348
Subject:
carbon dioxide; catalytic activity; detectors; ethane; flame ionization; nitrogen; synthesis gas; temperature
Abstract:
... We developed an original gas chromatographic procedure for determining the products and reagents for the catalytic synthesis of dimethyl ether (DME) from synthesis gas, which enables the simultaneous detection of СН₃ОН, DME, СО, СО₂, Н₂, Н₂О, N₂, and hydrocarbons to С₆. The gas circuit includes four detectors, three packed columns, two precolumns (to prevent water and organic compounds from enteri ...
DOI:
10.1134/S1061934819090181

18. Combination of a modified quick, easy, cheap, efficient, rugged, and safe extraction method with a deep eutectic solvent based microwave‐assisted dispersive liquid–liquid microextraction: Application in extraction and preconcentration of multiclass pesticide residues in tomato samples

Author:
Mir Ali Farajzadeh; Hessamaddin Sohrabi; Ali Mohebbi; Mohammad Reza Afshar Mogaddam
Source:
Journal of separation science 2019 v.42 no.6 pp. 1273-1280
ISSN:
1615-9306
Subject:
acetonitrile; centrifugation; detection limit; flame ionization; liquid-phase microextraction; microwave ovens; microwave treatment; pesticide residues; pesticides; solid wastes; solvents; tomato juice; tomatoes
Abstract:
... In this study, a new two–step extraction procedure based on the combination of a modified quick, easy, cheap, effective, rugged, and safe extraction method with a deep eutectic solvent based microwave‐assisted dispersive liquid–liquid microextraction has been developed for the extraction of multiclass pesticides in tomato samples before their analysis by gas chromatography with flame ionization de ...
DOI:
10.1002/jssc.201801107

19. Comparative study of fatty acid and sterol profiles for the investigation of potential milk fat adulteration

Author:
M.A. Nurseitova; F.B. Amutova; A.A. Zhakupbekova; A.S. Omarova; A.B. Kondybayev; G.A. Bayandy; N.N. Akhmetsadykov; B. Faye; G.S. Konuspayeva
Source:
Journal of dairy science 2019 v.102 no.9 pp. 7723-7733
ISSN:
0022-0302
Subject:
adulterated products; beta-sitosterol; campesterol; cholesterol; cluster analysis; comparative study; fatty acids; flame ionization; markets; mass spectrometry; milk; milk fat; multivariate analysis; vegetable oil; Central Asia
Abstract:
... Milk fat adulteration is a common issue in Central Asia. To assess the current situation in the commercial milk market, 17 milk samples were checked for fatty acid (FA) and sterol profiles to detect potential adulteration using multivariate analysis. Analysis of FA and sterols was performed using gas chromatography with flame ionization detection and gas chromatography with mass-spectrometric dete ...
DOI:
10.3168/jds.2018-15620

20. Comprehensive off-line silver phase liquid chromatography × gas chromatography with flame ionization and vacuum ultraviolet detection for the detailed characterization of mineral oil aromatic hydrocarbons

Author:
Alan Rodrigo García-Cicourel; Bas van de Velde; Joshka Verduin; Hans-Gerd Janssen
Source:
Journal of chromatography 2019 pp. 460391
ISSN:
0021-9673
Subject:
aromatic hydrocarbons; cooking fats and oils; cosmetics; flame ionization; liquid chromatography; mineral oil; purification methods; silver
Abstract:
... Highly purified mineral oils used for the elaboration of pharmaceutical, food and cosmetic products can contain residual mineral oil aromatic hydrocarbons (MOAH). Quantification of the MOAH level as well as detailed characterization of the aromatic species present is important for safety evaluations and for optimization of the purification process. Two comprehensive off-line silver phase liquid ch ...
DOI:
10.1016/j.chroma.2019.460391

21. Comprehensive two-dimensional gas chromatography for the analysis of nitrogen-containing compounds in fossil fuels: A review

Author:
Maria Elisabete Machado
Source:
Talanta 2019 v.198 pp. 263-276
ISSN:
0039-9140
Subject:
chemiluminescence; coal; comprehensive two-dimensional gas chromatography; detectors; distillates; flame ionization; fuel oils; hydrocarbons; mass spectrometry; nitrogen; petroleum
Abstract:
... The present review reports, for the first time, various comprehensive two-dimensional gas chromatography (GC×GC) applications for different fossil fuel matrices (crude oil, heavy gas oil (HGO), light and middle distillates, coal and shale oil) for the determination of nitrogen-containing compounds. The focus is on the various types of detectors (universal and specific), and their applicability for ...
DOI:
10.1016/j.talanta.2019.02.031

22. Determination of polycyclic aromatic hydrocarbons and potentially toxic metals in commonly consumed beef sausage roll products in Nigeria

Author:
J.A.O. Oyekunle; N.A. Yussuf; S.S. Durodola; A.S. Adekunle; A.A. Adenuga; O. Ayinuola; A.O. Ogunfowokan
Source:
Heliyon 2019 v.5 no.8 pp. e02345
ISSN:
2405-8440
Subject:
atomic absorption spectrometry; beef; beef consumption; flame ionization; guidelines; hexane; sausages; toxicity; Nigeria
Abstract:
... Levels of polycyclic aromatic hydrocarbons (PAHs) and potentially toxic metals (PTMs) were determined in the commonly consumed beef sausage roll products (coded BS1 – BS6) in Nigeria. This was done in order to assess the safety of regular consumption of these products with respect to the substances determined. Three batches of six samples of beef sausage roll products were collected from Ile-Ife, ...
DOI:
10.1016/j.heliyon.2019.e02345
PubMed:
31485531
PubMed Central:
PMC6717161

23. Determination of squalene in edible oils by transmethylation and GC analysis

Author:
Suzanne M. Budge; Christopher Barry
Source:
MethodsX 2019 v.6 pp. 15-21
ISSN:
2215-0161
Subject:
catalysts; cooking fats and oils; flame ionization; functional foods; reference standards; squalene; therapeutics; triterpenoids
Abstract:
... Squalene is a triterpenoid with medicinal, therapeutic and cosmetic applications. There is interest in identifying novel sources of squalene, creating a need for a rapid and accurate method of squalene determination. Here, we describe such an approach that involves first transmethylating the oil base containing squalene using a basic catalyst, followed by addition of internal standard and quantifi ...
DOI:
10.1016/j.mex.2018.12.001
PubMed:
30596025
PubMed Central:
PMC6308249

24. Discrimination of VOCs of the Plectranthus grandis by hydrodistillation, HS-SPME and cytotoxic activity

Author:
André L.M. Camelo; Francisco C. Oliveira; Francisco T. Correia; Francisco G. Barbosa; Jair Mafezoli; Izaura C.N. Diógenes; Ana J. Araújo; Letícia V. Costa-Lotufo; Elisane Longhinotti
Source:
Industrial crops and products 2019 v.127 pp. 225-231
ISSN:
0926-6690
Subject:
Plectranthus; adenocarcinoma; antineoplastic activity; brain; chemical composition; cytotoxicity; essential oils; flame ionization; headspace analysis; human cell lines; humans; hydrodistillation; leaves; mass spectrometry; molecular weight; multivariate analysis; neoplasm cells; ovarian neoplasms; roots; solid phase microextraction; stems; volatile organic compounds
Abstract:
... In this work, a multivariate data analysis to discriminate 73 volatile organic compounds (VOCs) of roots, stems and leaves of the Plectranthus grandis species which were extracted by hydrodistillation and headspace solid phase microextraction (HS-SPME) methods and identified by gas chromatography (GC) using a flame ionization detector (FID) and mass spectrometry detector (MS). Accordingly, sevente ...
DOI:
10.1016/j.indcrop.2018.10.053

25. Effect of Extraction and Drying Method on Chemical Composition, and Evaluation of Antioxidant and Antimicrobial Activities of Essential Oils from Salvia officinalis L.

Author:
Hadjer Boutebouhart; Linda Didaoui; Samira Tata; Nasserdine Sabaou
Source:
Journal of essential oil-bearing plants 2019 v.22 no.3 pp. 717-727
ISSN:
0976-5026
Subject:
2,2-diphenyl-1-picrylhydrazyl; Candida albicans; Pseudomonas aeruginosa; Salvia officinalis; air drying; antimicrobial properties; antioxidant activity; antioxidants; camphor; chemical analysis; chemical composition; cineole; essential oils; flame ionization; gas chromatography-mass spectrometry; hydrodistillation; leaves; microorganisms; microwave treatment; oils; ovens; steam distillation; viridiflorol; volatile compounds; Algeria
Abstract:
... The present study was carried out to determine, for the first time, the chemical composition, antioxidant and antimicrobial activities of essential oils from leaves of Salvia officinalis L. cultivated in Algeria. The essential oils (EOs) obtained by different extraction techniques: the microwave-assisted hydrodistillation (MAHD), the conventional hydrodistillation (HD) technique and the steam dist ...
DOI:
10.1080/0972060X.2019.1651223

26. Environmental significance of lubricant oil: A systematic study of photooxidation and its consequences

Author:
Ravi Shankar; Jee-Hyun Jung; Andrew Loh; Joon Geon An; Sung Yong Ha; Un Hyuk Yim
Source:
Water research 2019 pp. -
ISSN:
0043-1354
Subject:
Fourier transform infrared spectroscopy; Paralichthys olivaceus; anhydrides; environmental fate; environmental impact; flame ionization; gas chromatography-mass spectrometry; lubricants; marine environment; oils; photooxidation; pollution; research; toxicity; water; water solubility
Abstract:
... Lubricant (lube) oil discharge from ships has been widely considered as normal “operational consumption”, but is now deemed to be oil pollution. Despite the chronic contamination of the marine environment by lube oil, the number of studies related to its environmental impact, characteristics, and toxicity is limited. This study is the first attempt to investigate the environmental fate of lube oil ...
DOI:
10.1016/j.watres.2019.115183

27. Experimental Investigation of the Rheology and Crystal Morphology of Model Waxy Oils under Gelling Conditions

Author:
Thiago O. Marinho; Márcia C. K. De Oliveira; Márcio Nele
Source:
Energy & fuels 2019 v.33 no.10 pp. 9604-9618
ISSN:
1520-5029
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; differential scanning calorimetry; experimental design; flame ionization; fuels; gelation; gels; nuclear magnetic resonance spectroscopy; oils; paraffin wax; polarized light microscopy; prediction; regression analysis; remediation; rheology; stable isotopes; storage modulus; temperature; viscoelasticity
Abstract:
... The influence of six experimental variables (cooling rate, weight fraction of linear wax, weight fraction of branched wax, shear rate during cooling, final cooling temperature, and aging time) on the yield stress of gelled waxy oils was simultaneously investigated using an experimental design. Rheological tests were performed with systems comprising spindle oil and a blend of paraffin waxes. The w ...
DOI:
10.1021/acs.energyfuels.9b01972

28. Experimental data of the distillation of bio-oil from thermal cracking of methyl ester in castor oil

Author:
Guilherme Menshhein; Vanderlei Costa; Luana M. Chiarello; Dilamara R. Scharf; Edesio L. Simionato; Vanderleia Botton; Henry F. Meier; Vinicyus R. Wiggers; Laércio Ender
Source:
Data in Brief 2019 v.25 pp. 104325
ISSN:
2352-3409
Subject:
biofuels; carbon; castor oil; distillation; equipment; flame ionization; temperature
Abstract:
... This article presents the experimental data on distillation of bio-oil obtained from thermal cracking of a mixture of castor oil and its methyl esters. The interpretation of the data can be found in Menshhein et al. (2019) available on https://doi.org/10.1016/j.renene.2019.04.136. Experiments were carried out using a simple distillation apparatus and the products were quantified and qualified from ...
DOI:
10.1016/j.dib.2019.104325

29. Identification and overcome of limitations of weathered oil hydrocarbons bioremediation by an adapted Bacillus sorensis strain

Author:
Meriam Oualha; Nasser Al-Kaabi; Mohammad Al-Ghouti; Nabil Zouari
Source:
Journal of environmental management 2019 v.250 pp. 109455
ISSN:
0301-4797
Subject:
Bacillus sonorensis; Fourier transform infrared spectroscopy; ammonium nitrate; bacteria; bioaugmentation; biodegradation; biotechnology; carbon; cost effectiveness; flame ionization; mass spectrometry; nitrogen; oil spills; oils; pH; phosphorus; polluted soils; pollution; polycyclic aromatic hydrocarbons; polysorbates; soil treatment; surfactants; temperature; urea; Qatar
Abstract:
... Because of the high production of oil and gas in Qatar, the likelihood of oil spill occurrence is most probably susceptible to happen. Contaminated soil treatment is very expensive. Cost effective mechanisms are investigated to treat this threatening issue. For that reason, bioremediation and biotechnology tools are introduced to help accelerate and remove the pollution caused by the contamination ...
DOI:
10.1016/j.jenvman.2019.109455

30. Imprint and short-term fate of the Agia Zoni II tanker oil spill on the marine ecosystem of Saronikos Gulf

Author:
C. Parinos; I. Hatzianestis; S. Chourdaki; E. Plakidi; A. Gogou
Source:
Science of the total environment 2019 v.693 pp. 133568
ISSN:
0048-9697
Subject:
biodegradation; coasts; evaporation; flame ionization; fuel oils; gas chromatography-mass spectrometry; marine ecosystems; oil spills; petroleum; photolysis; photooxidation; polycyclic aromatic hydrocarbons; sediments; volatilization; weathering; Greece
Abstract:
... In this study we investigate the spatial and temporal imprint of the September 2017 Agia Zoni II tanker heavy fuel oil spill on the marine ecosystem of Saronikos Gulf (Greece). Based on the chemical fingerprinting approach, by means of gas chromatography - flame ionization detector, gas chromatography–mass spectrometry and the use of various diagnostic ratios, we characterize changes in the compos ...
DOI:
10.1016/j.scitotenv.2019.07.374

31. Magnetic graphene oxide–based solid-phase extraction combined with dispersive liquid–liquid microextraction for the simultaneous preconcentration of four typical pesticide residues in fruit juice and pulp

Author:
Behruz Feriduni; Ali Mohebbi; Mir Ali Farajzadeh; Maryam Namvar
Source:
Food analytical methods 2019 v.12 no.12 pp. 2742-2752
ISSN:
1936-9751
Subject:
acetonitrile; adsorption; chloroform; flame ionization; fruit juices; fruit pulp; graphene; graphene oxide; liquid-phase microextraction; magnetic materials; magnetism; pesticides; solid phase extraction; solvents; standard deviation; water solubility
Abstract:
... In the present work, magnetic graphene oxide–based solid-phase extraction combined with dispersive liquid–liquid microextraction has been developed for the extraction and preconcentration of some widely used pesticide residues in juice and pulp of fruits before their determination with gas chromatography–flame ionization detection. In this method, an appropriate weight of a synthetic magnetic grap ...
DOI:
10.1007/s12161-019-01635-z

32. Metabolic Changes of Fusarium graminearum Induced by TPS Gene Deletion

Author:
Caixiang Liu; Fangfang Chen; Jingtao Zhang; Laixing Liu; Hehua Lei; Heping Li; Yulan Wang; Yu-Cai Liao; Huiru Tang
Source:
Journal of proteome research 2019 v.18 no.9 pp. 3317-3327
ISSN:
1535-3907
Subject:
Fusarium graminearum; Fusarium head blight; alpha,alpha-trehalose-phosphate synthase (UDP-forming); biosynthesis; citrates; crop production; domestic animals; fatty acids; flame ionization; fungicides; gene deletion; genes; glycolysis; guanosine; humans; inosine; mass spectrometry; metabolomics; mutants; mycotoxins; nuclear magnetic resonance spectroscopy; proteome; trehalose; trehalose-phosphatase; tricarboxylic acid cycle; uridine; wheat
Abstract:
... Fusarium head blight (FHB) mainly resulting from Fusarium graminearum (Fg) Schwabe is a notorious wheat disease causing huge losses in wheat production globally. Fg also produces mycotoxins, which are harmful to human and domestic animals. In our previous study, we obtained two Fg mutants, TPS1– and TPS2–, respectively, with a single deletion of trehalose 6-phosphate synthase (TPS1) and trehalose ...
DOI:
10.1021/acs.jproteome.9b00259

33. Methodological approach to determine carlina oxide – a main volatile constituent of Carlina acaulis L. essential oil

Author:
Maciej Strzemski; Magdalena Wójciak-Kosior; Ireneusz Sowa; Ryszard Kocjan; Katarzyna Tyszczuk-Rotko
Source:
Talanta 2019 v.191 pp. 504-508
ISSN:
0039-9140
Subject:
Carlina; electrodes; essential oils; flame ionization; high performance liquid chromatography; mixing; plant extracts; statistical analysis; sulfuric acid
Abstract:
... In this work, a fast and low-cost voltammetric methodology for determination of carlina oxide in plant extracts was developed. The best results were obtained using a boron-doped diamond electrode (BDDE). The voltammetric measurements of carlina oxide were performed in a 0.1 mol/L solution of sulphuric acid. After 30 s of stirring the solution, differential pulse voltammograms (DPVs) were recorded ...
DOI:
10.1016/j.talanta.2018.09.005

34. Modulatory Effects of Alkaloid Extract from Gongronema latifolium (Utazi) and Lasianthera africana (Editan) on Activities of Enzymes Relevant to Neurodegeneration

Author:
Esther E. Nwanna; Adeniyi A. Adebayo; Ganiyu Oboh; Opeyemi B. Ogunsuyi; Ayokunle O. Ademosun
Source:
Journal of dietary supplements 2019 v.16 no.1 pp. 27-39
ISSN:
1939-022X
Subject:
acetylcholinesterase; alkaloids; amine oxidase (flavin-containing); choline; cholinesterase; dietary supplements; enzyme inhibition; flame ionization; neurodegenerative diseases; Nigeria
Abstract:
... Most alkaloids are produced by plants as a defense mechanism against herbivores. Since alkaloids are known to possess pharmacological effects, this study sought to investigate the in vitro modulatory effect of alkaloid obtained from two commonly consumed vegetables in southern Nigeria, Lasianthera africana (editan) and Gongronema latifolium (utazi), on some enzyme activities relevant to neurodegen ...
DOI:
10.1080/19390211.2018.1426075

35. Pharmacokinetics of S-(+)-linalool in silver catfish (Rhamdia quelen) after immersion bath: An anesthetic for aquaculture

Author:
Adriane Erbice Bianchini; Quelen Iane Garlet; Patrícia Rodrigues; Carine de Freitas Souza; Lenise de Lima Silva; Alessandro Casale dos Santos; Berta Maria Heinzmann; Bernardo Baldisserotto
Source:
Aquaculture 2019 v.506 pp. 302-307
ISSN:
0044-8486
Subject:
Rhamdia quelen; anesthesia; anesthetics; aquaculture; blood; blood flow; blood sampling; brain; fish; flame ionization; half life; pharmacokinetics; phytochemicals; sedatives
Abstract:
... S-(+)-linalool is a phytochemical with proven sedative and anesthetic effects in silver catfish (Rhamdia quelen); however, the pharmacokinetic profile of this compound in fish remains unknown. Therefore, this study describes the pharmacokinetics of S-(+)-linalool in silver catfish anesthetized by immersion bath. Fish were exposed to 153 mg/L S-(+)-linalool for a maximum of 30 min. Blood and brain ...
DOI:
10.1016/j.aquaculture.2019.03.044

36. PipeNig®-FL, a Fluid Extract of Black Pepper (Piper Nigrum L.) with a High Standardized Content of Trans-β-Caryophyllene, Reduces Lipid Accumulation in 3T3-L1 Preadipocytes and Improves Glucose Uptake in C2C12 Myotubes

Author:
Federica Geddo; Rosaria Scandiffio; Susanna Antoniotti; Erika Cottone; Giulia Querio; Massimo E. Maffei; Patrizia Bovolin; Maria Pia Gallo
Source:
Nutrients 2019 v.11 no.11 pp. -
ISSN:
2072-6643
Subject:
Piper nigrum; Toll-like receptors; acute exposure; adipocytes; adipogenesis; antioxidants; beta-caryophyllene; black pepper; cannabinoid receptors; flame ionization; fluorescence; fluorescent antibody technique; glucose; glucose transporters; lipid content; lipids; medicinal properties; myotubes; signal transduction; spectroscopy; staining
Abstract:
... Trans-β-caryophyllene (BCP) is a natural sesquiterpene hydrocarbon with several important pharmacological activities, including antioxidant, anti-inflammatory, anticancer, and cardioprotective functions. These properties are mainly due to its selective interaction with the peripherally expressed cannabinoid receptor 2. In addition, BCP activates peroxisome proliferated activator receptors &al ...
DOI:
10.3390/nu11112788
PubMed:
31731718
PubMed Central:
PMC6893583

37. Qualitative and Quantitative Analysis of the Product and By-Products from Transesterification between Phenol and Dimethyl Carbonate

Author:
Tao Liu; Jing Hu; Li Yong; Gang Zhang; Yi Zhang; Tong Chen; Gongying Wang
Source:
Journal of Analytical Methods in Chemistry (Online) 2019 v.2019 pp. -
ISSN:
2090-8873
Subject:
4-hydroxybenzoic acid; acetone; byproducts; carbonates; detection limit; flame ionization; gas chromatography-mass spectrometry; hydrogen; phenol; quantitative analysis; standard deviation; transesterification; xanthone
Abstract:
... By-products (phenyl salicylate, phenyl 4-hydroxybenzoate, and xanthone) from transesterification between phenol and dimethyl carbonate (DMC) were qualitatively analyzed by gas chromatography-mass spectrometry, and a gas chromatographic method with directed injection for simultaneous quantitative analysis of the product (DPC) and by-products of the transesterification has been established. Based on ...
DOI:
10.1155/2019/7632520
PubMed:
30984443
PubMed Central:
PMC6431506

38. Select Dietary Fibers Alter GI Microbiome Composition & Promote Fermentative Metabolism in the Lower Gastrointestinal Tract of Healthy Adult Dogs (P20-044-19)

Author:
Dale Fritsch; Susan Wernimont; Matthew Jackson; Dayakar Badri; Chun-Yen Cochrane; Kathy Gross
Source:
Current developments in nutrition 2019 v.3 no.Supplement_1 pp. -
ISSN:
2475-2991
Subject:
Bacteroides; Enterococcus; acetic acid; adults; animal care; animal feeding; barley; beet pulp; biochemical pathways; butyrates; cellulose; citrus pulp; corn; cranberries; defecation; dietary fiber; dietary recommendations; dogs; dried foods; feces; fermentation; flame ionization; freshwater; gastrointestinal system; ginger root; insoluble fiber; linseed; liquid-liquid extraction; metabolites; microbiome; oats; pecan shells; phenylalanine; plant fibers; psyllium gum; pumpkins; ribosomal RNA; sequence analysis; short chain fatty acids; soluble fiber; statistical models; test meals; tyrosine; whole grain foods
Abstract:
... The canine gastrointestinal (GI) microbiome is capable of fermenting fibers. We evaluated select dietary plant fibers on canine GI microbiome composition & metabolism. 39 adult dogs were fed a control food (CF) for 4 weeks, then fed a test food (TF) for 4 weeks. (CF: 3411 kcals/kg, 2.2 g total dietary fiber, TDF; 0.5 g soluble fiber, SF; 1.7 g insoluble fiber, INSF per 100 kcal; TF: 3273 kcal/kg, ...
DOI:
10.1093/cdn/nzz040.P20-044-19

39. Simple and rapid method to analyse squalene in olive oils and extra virgin olive oils

Author:
Deborah Pacetti; Serena Scortichini; Maria Chiara Boarelli; Dennis Fiorini
Source:
Food control 2019 v.102 pp. 240-244
ISSN:
0956-7135
Subject:
detection limit; extra-virgin olive oil; flame ionization; rapid methods; squalene; vegetables
Abstract:
... Olive oil is one of the main vegetable sources of squalene, substance with several interesting properties and applications. This work aims to present and validate a rapid method to quantify squalene in olive oil by gas chromatography (GC) coupled with flame ionization detector and to apply the method to extra virgin olive oils (EVOOs) and olive oils (OOs) from large scale distribution retail, and ...
DOI:
10.1016/j.foodcont.2019.03.005

40. Spatial differentiation of cultivated soils using compound-specific stable isotopes (CSSIs) in a temperate agricultural watershed in Manitoba, Canada

Author:
Dominic G. Reiffarth; Ellen L. Petticrew; Philip N. Owens; David A. Lobb
Source:
Journal of soils and sediments 2019 v.19 no.9 pp. 3411-3426
ISSN:
1439-0108
Subject:
Bayesian theory; agricultural watersheds; autumn; biomarkers; carbon; data analysis; environmental factors; fields; flame ionization; mass spectrometry; mixing; models; riparian areas; sediments; soil; spatial variation; spring; stable isotopes; t-test; temporal variation; tracer techniques; very long chain fatty acids; Manitoba
Abstract:
... PURPOSE: Compound-specific stable isotopes (CSSIs) of very long-chain fatty acids (VLCFAs) of plant origin were investigated in a soil and sediment tracing context in a watershed in Manitoba, Canada. Spatial and temporal variability in δ¹³CFA values and concentrations was examined at the point, transect, and field scales to determine the (1) ability to differentiate sediment sources in C3-cropped ...
DOI:
10.1007/s11368-019-02406-3

41. Specialized Dietary Fibers Alter Microbiome Composition & Promote Fermentative Metabolism in the Lower Gastrointestinal Tract of Healthy Adult Cats (P20-045-19)

Author:
Susan Wernimont; Dale Fritsch; Matthew Jackson; Dayakar Badri; Chun-Yen Cochrane; Kathy Gross
Source:
Current developments in nutrition 2019 v.3 no.Supplement_1 pp. -
ISSN:
2475-2991
Subject:
Bacteroides; Enterococcus; Peptococcus; Succinivibrio; adults; animal care; animal feeding; arginine; barley; beet pulp; biochemical pathways; butyrates; cats; citrus pulp; cleaning; corn; cranberries; defecation; dietary fiber; feces; fermentation; flame ionization; fructooligosaccharides; gastrointestinal system; guidelines; insoluble fiber; linseed; liquid-liquid extraction; metabolites; microbiome; oats; peas; pecan shells; phenylalanine; plant fibers; pomace; propionic acid; psyllium gum; pumpkins; ribosomal RNA; sequence analysis; short chain fatty acids; solar radiation; soluble fiber; statistical models; test meals; toys; tryptophan; tyrosine; whole grain foods
Abstract:
... The feline gastrointestinal (GI) microbiome is capable of fermenting fibers. We evaluated specialized dietary plant fibers on feline GI microbiome composition & metabolism. 46 healthy adult cats were fed control food (CF) for 4 wks & test food (TF) for 8 wks (CF: 4129 kcal/kg, 1.6 g total dietary fiber, TDF; 0.7 g soluble fiber, SF; & 0.9 g insoluble fiber, INSF, per 100 kcal; TF: 4010 kcal/kg, 3. ...
DOI:
10.1093/cdn/nzz040.P20-045-19

42. Sweet Basil (Ocimum basilicum L.) Productivity and Raw Material Quality from Organic Cultivation

Author:
Katarzyna Bączek; Olga Kosakowska; Małgorzata Gniewosz; Iwona Gientka; Zenon Węglarz
Source:
Agronomy 2019 v.9 no.6 pp. -
ISSN:
2073-4395
Subject:
Ocimum basilicum; air; basil; chemical analysis; chlorophyll; climatic factors; crop production; essential oils; flame ionization; flavonoids; foil; foods; linalool; mass spectrometry; microbiological quality; organic production; pesticide residues; phenolic acids; raw materials; sensory evaluation
Abstract:
... Sweet basil is one of the most important culinary herbs. Currently, its production is carried out mainly in accordance with conventional agriculture. However, its cultivation in organic systems seems to be better adjusted to consumer demands connected with the lack of pesticide residues in foods and their safety. In the present study, two methods of basil cultivation in organic farming system were ...
DOI:
10.3390/agronomy9060279

43. Analysis of major carotenoids and fatty acid composition of freshwater microalgae

Author:
Aline Terra Soares; Dayane Cristina da Costa; Armando Augusto Henriques Vieira; Nelson Roberto Antoniosi Filho
Source:
Heliyon 2019 v.5 no.4 pp. e01529
ISSN:
2405-8440
Subject:
Chlamydomonas; Chlorella; Coelastrum; Desmodesmus; Parachlorella kessleri; astaxanthin; atmospheric pressure; biodiesel; dietary supplements; docosahexaenoic acid; eicosapentaenoic acid; environmental sustainability; fatty acid composition; flame ionization; freshwater; high performance liquid chromatography; ionization; lutein; microalgae; raw materials; tandem mass spectrometry
Abstract:
... Considering the nutraceutical properties, the high commercial value from pigments and essential lipids and the environmental sustainability, the purposes of this study were to assess the major carotenoids and fatty acids composition of nine microalgae species as a source of nutraceutical compounds and as fatty raw material for biodiesel production. The carotenoid and fatty acid content were analyz ...
DOI:
10.1016/j.heliyon.2019.e01529
PubMed:
31049438
PubMed Central:
PMC6484207

44. Application of a needle trap device packed with XAD-2 polyaniline composite for sampling naphthalene and phenanthrene in air

Author:
Zahra Ghalichi Zave; Abdulrahman Bahrami; Farshid Ghorbani Shahna; Maryam Farhadian
Source:
Journal of chromatography 2019 v.1602 pp. 74-82
ISSN:
0021-9673
Subject:
adsorption; air; cost effectiveness; desorption; detection limit; flame ionization; headspace analysis; naphthalene; phenanthrenes; polymers; sorbents; storage time; temperature
Abstract:
... The purpose of this study was to develop a new method for the sampling and analysis of naphthalene (Nap) and phenanthrene (Phe) in air. XAD-2 sorbent was prepared with polyaniline (PANI) to increase its adsorption area. Thus, 22-gauge needles were packed with XAD-2/PANI sorbent for the extraction of Nap and Phe, and sampling of the analytes of interest. The compounds were dynamically sampled from ...
DOI:
10.1016/j.chroma.2019.05.058

45. Assessment of exposure of gas station attendants in Sri Lanka to benzene, toluene and xylenes

Author:
Paul T.J. Scheepers; Laurie de Werdt; Maurice van Dael; Rob Anzion; Jeroen Vanoirbeek; Radu Corneliu Duca; Matteo Creta; Lode Godder; D.T.D. Warnakulasuriya; Niranga Manjuri Devanarayana
Source:
Environmental research 2019 pp. -
ISSN:
0013-9351
Subject:
air; air sampling; benzene; breathing; dermal exposure; desorption; flame ionization; fuels; gas chromatography-mass spectrometry; inhalation exposure; isomers; liquid chromatography; metabolites; office workers; time-weighted average; toluene; urine; work schedules; xylene; Sri Lanka
Abstract:
... Exposure to benzene, toluene and p-, m-, o-xylene (BTX) was studied in 29 gas station attendants and 16 office workers in Sri Lanka. The aim of this study was to assess the exposure level and identify potential exposure mitigating measures. Pre- and post-shift samples of end-exhaled air were collected and analysed for BTX on a thermal desorption gas chromatography mass spectrometry system (TD-GC-M ...
DOI:
10.1016/j.envres.2019.108670

46. Bioremediation of petroleum-contaminated soils using Streptomyces sp. Hlh1

Author:
Hafida Baoune; Juan Daniel Aparicio; Graciela Pucci; Aminata Ould El Hadj-Khelil; Marta Alejandra Polti
Source:
Journal of soils and sediments 2019 v.19 no.5 pp. 2222-2230
ISSN:
1439-0108
Subject:
Lactuca sativa; Streptomyces; alkanes; aromatic hydrocarbons; biomass; bioremediation; endophytes; flame ionization; lettuce; liquids; metabolites; microorganisms; petroleum; phytotoxicity; pollutants; polluted soils; seedlings; soil remediation; soil sampling; soil sterilization
Abstract:
... PURPOSE: Bioremediation using microorganisms is a promising strategy to remediate soil with petroleum hydrocarbons. Streptomyces sp. Hlh1, an endophytic strain, has previously demonstrated the ability to degrade crude petroleum in liquid culture. To apply this strain at field scale, it is necessary to test its ability to colonize the soil, compete with native microbiota, and remove the petroleum h ...
DOI:
10.1007/s11368-019-02259-w

47. Catalytic deoxygenation of vapors obtained from ablative fast pyrolysis of wheat straw using mesoporous HZSM-5

Author:
Andreas Eschenbacher; Peter Arendt Jensen; Ulrik Birk Henriksen; Jesper Ahrenfeldt; Sokol Ndoni; Chengxin Li; Jens Øllgaard Duus; Uffe Vie Mentzel; Anker Degn Jensen
Source:
Fuel processing technology 2019 v.194 pp. 106119
ISSN:
0378-3820
Subject:
X-ray diffraction; X-ray fluorescence spectroscopy; acid value; aluminum; ammonia; carbon; catalysts; chemical composition; desorption; flame ionization; fossil fuels; gas chromatography-mass spectrometry; gel chromatography; nuclear magnetic resonance spectroscopy; oils; oxygen; porous media; pyrolysis; pyrolysis oils; silicon; stable isotopes; steam; thermogravimetry; transmission electron microscopy; washing; wheat straw
Abstract:
... Steam treated HZSM-5 with different Si/Al ratios were tested as catalysts for the upgrading of wheat straw pyrolysis vapors and their performance was compared to hierarchical counterparts, which were prepared by desilication followed by acid washing. Pyrolysis vapors were generated in an ablative system, hot gas filtered, and upgraded in an ex-situ catalyst bed to remove oxygen functionalities and ...
DOI:
10.1016/j.fuproc.2019.106119

48. Chemical Composition, Antimicrobial andAntioxidant Activity of Birch (Betula pendula Roth.) Buds Essential Oil

Author:
Marijana S. Vladimirov; Vesna D. Nikolic; Ljiljana P. Stanojevic; Jelena S. Stanojevic; Ljubisa B. Nikolic; Bojana R. Danilovic; Valentina D. Marinkovic
Source:
Journal of essential oil-bearing plants 2019 v.22 no.1 pp. 120-130
ISSN:
0976-5026
Subject:
2,2-diphenyl-1-picrylhydrazyl; Betula pendula; Candida albicans; Gram-negative bacteria; Klebsiella pneumoniae; Proteus vulgaris; antimicrobial properties; antioxidant activity; buds; chemical composition; essential oils; flame ionization; fungi; germacrene; hydrodistillation; mass spectrometry
Abstract:
... The essential oil from birch (Betula pendula Roth.) buds was obtained by Clevenger-type hydrodistillation. Its qualitative and quantitative composition was determined by gas chromatography in combination with mass spectrometry (GC/MS) and flame ionization detection (GC/FID), respectively. Twenty-seven compounds, mainly sesquiterpene hydrocarbons (78.7%) and oxygenated sesquiterpenes (14.8%), were ...
DOI:
10.1080/0972060X.2019.1602084

49. Chemical Composition, Enantiomeric Distribution, and Sensory Evaluation of the Essential Oils Distilled from the Ecuadorian Species Myrcianthes myrsinoides (Kunth) Grifo and Myrcia mollis (Kunth) DC. (Myrtaceae)

Author:
Mayra Montalván; Manuel Alejandro Peñafiel; Jorge Ramírez; Nixon Cumbicus; Nicole Bec; Christian Larroque; Carlo Bicchi; Gianluca Gilardoni
Source:
Plants 2019 v.8 no.11 pp. -
ISSN:
2223-7747
Subject:
Myrcia; acetylcholinesterase; alpha-pinene; beta-caryophyllene; beta-pinene; chemical composition; cholinesterase; cineole; enantioselectivity; essential oils; flame ionization; gamma-terpinene; gas chromatography-mass spectrometry; limonene; linalool; metabolites; myrcene; odors; sensory evaluation; spathulenol; steam distillation; terpinolene
Abstract:
... The essential oils of Myrcianthes myrsinoides and Myrcia mollis, belonging to the Myrtaceae family, were obtained by steam distillation. They were analyzed by gas chromatography-mass spectrometry (GC-MS), gas chromatography-flame ionization detector (GC-FID), enantioselective gas chromatography, and gas chromatography-olfactometry (GC-O). A total of 58 compounds for Myrcianthes myrsinoides essenti ...
DOI:
10.3390/plants8110511
PubMed:
31731807
PubMed Central:
PMC6918321

50. Chemical characterization and in vitro antioxidant and antimicrobial activities of essential oil from Commiphora wildii Merxm. (omumbiri) resin

Author:
Jacobina T. Sheehama; Celine Mukakalisa; Theopolina Amakali; Lydia N. Uusiku; Renate H. Hans; Karen Nott; Amber Nott; Stefan Louw
Source:
Flavour and fragrance journal 2019 v.34 no.4 pp. 241-251
ISSN:
0882-5734
Subject:
2,2-diphenyl-1-picrylhydrazyl; Candida albicans; Commiphora; Escherichia coli; Klebsiella; Staphylococcus aureus; alpha-pinene; antimicrobial properties; antioxidant activity; beta-pinene; biofilm; cosmetics; detergents; essential oils; flame ionization; gas chromatography-mass spectrometry; heptane; industry; ingredients; inhibitory concentration 50; minimum inhibitory concentration; oils; perfumes; quality control; steam distillation; women; Namibia
Abstract:
... The resin of the plant Commiphora wildii Merxm. (omumbiri) is traditionally used by Ovahimba women (Kunene, Namibia) as the main ingredient for their perfume. Although essential oil produced from the resin by steam distillation is sold commercially, its detailed chemical composition and biological properties are not known. Knowledge on the potential antimicrobial and antioxidant activities of C. w ...
DOI:
10.1002/ffj.3495