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WTS Database
The subject of interest is:
waterpipe, water-pipe, nargile, narghile, arguileh, arguile, shisha, sheesha, chichi, hubble bubble, hubbly bubbly, goza, hookah, bong
| Title | Pub Year | Author Sort descending | SearchLink |
|---|---|---|---|
| Trends in species distribution and susceptibility of bloodstream isolates of Candida collected in Monterrey, Mexico, to seven antifungal agents: results of a 3-year (2004 to 2007) surveillance study | 2008 | Departamento de Microbiologia, Facultad de Medicina, Universidad Autonoma de Nuevo Leon, Colonia Mitras Centro, Monterrey, NL, Mexico. gmglez@yahoo.com.mx | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of clinical microbiology
Periodical, Abbrev.
J.Clin.Microbiol.
Pub Date Free Form
Sep
Volume
46
Issue
9
Start Page
2902
Other Pages
2905
Notes
LR: 20141120; JID: 7505564; 0 (Antifungal Agents); 0 (ER 30346); 0 (Echinocandins); 0 (Pyrimidines); 0 (Thiazoles); 0 (Triazoles); 304NUG5GF4 (Itraconazole); 6TK1G07BHZ (posaconazole); 7XU7A7DROE (Amphotericin B); 8VZV102JFY (Fluconazole); F0XDI6ZL63 (cas
Place of Publication
United States
ISSN/ISBN
1098-660X; 0095-1137
Accession Number
PMID: 18632907
Language
eng
SubFile
Journal Article; IM
DOI
10.1128/JCM.00937-08 [doi]
Output Language
Unknown(0)
PMID
18632907
Abstract
During a 3-year surveillance program (2004 to 2007) in Monterrey, Mexico, 398 isolates of Candida spp. were collected from five hospitals. We established the species distribution and in vitro susceptibilities of these isolates. The species included 127 Candida albicans strains, 151 C. parapsilosis strains, 59 C. tropicalis strains, 32 C. glabrata strains, 11 C. krusei strains, 5 C. guilliermondii strains, 4 C. famata strains, 2 C. utilis strains, 2 C. zeylanoides strains, 2 C. rugosa strains, 2 C. lusitaniae strains, and 1 C. boidinii strain. The species distribution differed with the age of the patients. The proportion of candidemias caused by C. parapsilosis was higher among infants 45 years old). MICs were calculated following the criteria of the Clinical Laboratory Standards Institute reference broth macrodilution method. Overall, C. albicans, C. parapsilosis, and C. tropicalis isolates were susceptible to fluconazole and amphotericin B. However, 31.3% of C. glabrata isolates were resistant to fluconazole (MIC >or= 64 microg/ml), 43.3% were resistant to itraconazole (MIC >or= 1 microg/ml), and 12.5% displayed resistance to amphotericin B (MIC >or= 2 microg/ml). Newer triazoles, namely, voriconazole, posaconazole, and ravuconazole, had a notable in vitro activity against all Candida species tested. Also, caspofungin was active against Candida sp. isolates (MIC(90) <or= 0.5 microg/ml) except C. parapsilosis (MIC(90) = 2 microg/ml). It is imperative to promote a national-level surveillance program to monitor this important microorganism.
Descriptors
Adolescent, Adult, Age Factors, Aged, Aged, 80 and over, Amphotericin B/pharmacology/therapeutic use, Antifungal Agents/pharmacology/therapeutic use, Candida/drug effects, Candida albicans/drug effects, Candida glabrata/drug effects, Candida tropicalis/drug effects, Candidiasis/drug therapy/microbiology, Child, Child, Preschool, Echinocandins/pharmacology/therapeutic use, Female, Fluconazole/pharmacology/therapeutic use, Humans, Infant, Infant, Newborn, Itraconazole/pharmacology/therapeutic use, Male, Mexico, Microbial Sensitivity Tests, Middle Aged, Pyrimidines/pharmacology/therapeutic use, Thiazoles/pharmacology/therapeutic use, Triazoles/pharmacology/therapeutic use, Voriconazole, Young Adult
Links
Book Title
Database
Publisher
Data Source
Authors
Gonzalez,G. M., Elizondo,M., Ayala,J.
Original/Translated Title
URL
Date of Electronic
20080716
PMCID
PMC2546732
Editors
|
|||
| Candidemia by species of the Candida parapsilosis complex in children's hospital: prevalence, biofilm production and antifungal susceptibility | 2013 | Departamento de Microbiologia, Instituto de Ciencias Biomedicas II, Universidade de Sao Paulo (USP), Sao Paulo, SP, Brazil. lu_ruiz74@hotmail.com | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Mycopathologia
Periodical, Abbrev.
Mycopathologia
Pub Date Free Form
Apr
Volume
175
Issue
4-Mar
Start Page
231
Other Pages
239
Notes
LR: 20131029; JID: 7505689; 0 (Antifungal Agents); 0 (DNA, Fungal); 0 (DNA, Ribosomal Spacer); 2012/10/05 [received]; 2013/01/15 [accepted]; 2013/02/13 [aheadofprint]; ppublish
Place of Publication
Netherlands
ISSN/ISBN
1573-0832; 0301-486X
Accession Number
PMID: 23404576
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1007/s11046-013-9616-5 [doi]
Output Language
Unknown(0)
PMID
23404576
Abstract
Opportunistic infections are an increasingly common problem in hospitals, and the yeast Candida parapsilosis has emerged as an important nosocomial pathogen. The aims of this study were to determine and compare (i) the prevalence rate among C. parapsilosis complex organisms isolated from blood in a public children's hospital in Sao Paulo state, (ii) the ability of the complex C. parapsilosis species identified to produce biofilm and (iii) the antifungal susceptibility profiles. Forty-nine (49) specimens of isolated blood yeast were analyzed, previously identified as C. parapsilosis by conventional methods. After the molecular analysis, the isolates were characterized as C. parapsilosis sensu stricto (83.7 %), C. orthopsilosis (10.2 %) and C. metapsilosis (6.1 %). All species were able to form biofilm. The species with the highest biofilm production was C. parapsilosis sensu stricto, followed by C. orthopsilosis and further by C. metapsilosis. All of the strains have demonstrated similar susceptibility to fluconazole, caspofungin, voriconazole, cetoconazole and 5-flucytosine. Only one strain of C. parapsilosis was resistant to amphotericin B. Regarding itraconazole, 66.6 and 43.9 % isolates of C. metapsilosis and C. parapsilosis, respectively, have demonstrated to be susceptible dose-dependent, with one isolate of the latter species resistant to the drug. Candida parapsilosis sensu stricto has demonstrated to be the less susceptible, mainly to amphotericin B, caspofungin and "azoles" such as fluconazole. Therefore, C. metapsilosis and C. orthopsilosis are still involved in a restricted number of infections, but these data have become essential for there are very few studies of these species in Latin America.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Ruiz,L.S., Khouri,S., Hahn,R.C., da Silva,E.G., de Oliveira,V.K., Gandra,R.F., Paula,C.R.
Original/Translated Title
URL
Date of Electronic
20130213
PMCID
Editors
|
|||
| Biofilm formation and effect of caspofungin on biofilm structure of Candida species bloodstream isolates | 2009 | Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil. jantgferr@hotmail.com | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Antimicrobial Agents and Chemotherapy
Periodical, Abbrev.
Antimicrob.Agents Chemother.
Pub Date Free Form
Oct
Volume
53
Issue
10
Start Page
4377
Other Pages
4384
Notes
LR: 20141207; JID: 0315061; 0 (Antifungal Agents); 0 (Echinocandins); F0XDI6ZL63 (caspofungin); OID: NLM: PMC2764222; 2009/06/22 [aheadofprint]; ppublish
Place of Publication
United States
ISSN/ISBN
1098-6596; 0066-4804
Accession Number
PMID: 19546368
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1128/AAC.00316-09 [doi]
Output Language
Unknown(0)
PMID
19546368
Abstract
Candida biofilms are microbial communities, embedded in a polymeric matrix, growing attached to a surface, and are highly recalcitrant to antimicrobial therapy. These biofilms exhibit enhanced resistance against most antifungal agents except echinocandins and lipid formulations of amphotericin B. In this study, biofilm formation by different Candida species, particularly Candida albicans, C. tropicalis, and C. parapsilosis, was evaluated, and the effect of caspofungin (CAS) was assessed using a clinically relevant in vitro model system. CAS displayed in vitro activity against C. albicans and C. tropicalis cells within biofilms. Biofilm formation was evaluated after 48 h of antifungal drug exposure, and the effects of CAS on preformed Candida species biofilms were visualized using scanning electron microscopy (SEM). Several species-specific differences in the cellular morphologies associated with biofilms were observed. Our results confirmed the presence of paradoxical growth (PG) in C. albicans and C. tropicalis biofilms in the presence of high CAS concentrations. These findings were also confirmed by SEM analysis and were associated with the metabolic activity obtained by biofilm susceptibility testing. Importantly, these results suggest that the presence of atypical, enlarged, conical cells could be associated with PG and with tolerant cells in Candida species biofilm populations. The clinical implications of these findings are still unknown.
Descriptors
Antifungal Agents/pharmacology, Biofilms/drug effects/growth & development, Candida/drug effects/growth & development/ultrastructure, Echinocandins/pharmacology, Humans, Microscopy, Electron, Scanning
Links
Book Title
Database
Publisher
Data Source
Authors
Ferreira,J. A., Carr,J. H., Starling,C. E., de Resende,M. A., Donlan,R. M.
Original/Translated Title
URL
Date of Electronic
20090622
PMCID
PMC2764222
Editors
|
|||
| Adherence to treatment to help quit smoking: effects of task performance and coping with withdrawal symptoms | 2014 | Departamento de Personalidad, Evaluacion y Tratamiento Psicologico, Centro de Investigacion Cuerpo Cerebro Comportamiento (CIMCYC), Universidad de Granada, Campus Universitario de Cartuja s/n, 18071 Granada, Espana. fcalopez@ugr.es. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
BMC public health
Periodical, Abbrev.
BMC Public Health
Pub Date Free Form
25-Nov
Volume
14
Issue
Start Page
1217
Other Pages
2458-14-1217
Notes
LR: 20151028; JID: 100968562; OID: NLM: PMC4289175; 2014/02/23 [received]; 2014/11/10 [accepted]; 2014/11/25 [aheadofprint]; epublish
Place of Publication
England
ISSN/ISBN
1471-2458; 1471-2458
Accession Number
PMID: 25424314
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1186/1471-2458-14-1217 [doi]
Output Language
Unknown(0)
PMID
25424314
Abstract
BACKGROUND: Currently the combined cognitive-behavioral and pharmacological treatment is the best option to quit smoking, although success rates remain moderate. This study aimed to identify predictors of continuous abstinence in an assisted smoking cessation program using combined treatment. In particular, we analyzed the effects of socio-demographic, smoking-, and treatment-related variables. In addition, we analyzed the effect of several risk factors on abstinence, and estimated a model of risk for smoking relapse. METHODS: Participants were 125 workers at the University of Granada (50 males), with an average age of 46.91 years (SD = 8.15). They were recruited between 2009 and 2013 at an occupational health clinic providing smoking cessation treatment. Baseline measures included socio-demographic data, preferred brand of cigarettes, number of years smoking, use of alcohol and/or tranquilizers, past attempts to quit, Fargerstrom Test for Nicotine Dependence, Smoking Processes of Change Scale, and Coping with Withdrawal Symptoms Interview. Participants were invited to a face-to-face assessment of smoking abstinence using self-report and cooximetry hemoglobin measures at 3, 6, and 12 months follow-up. The main outcome was smoking status coded as "relapse" versus "abstinence" at each follow-up. Kaplan-Meier survival analysis was performed to estimate the probability of continued abstinence during 12 months and log-rank tests were used to analyze differences in continued abstinence as a function of socio-demographic, smoking-, and treatment-related variables. Cox regression was used to analyze the simultaneous effect of several risk factors on abstinence. RESULTS: Using alcohol and/or tranquilizers was related to shorter abstinence. Physical exercise, the number of treatment sessions, performance of treatment tasks, and coping with withdrawal symptoms were related to prolonged abstinence. In particular, failure to perform the treatment tasks tripled the risk of relapse, while lack of coping doubled it. CONCLUSIONS: Our results show that physical exercise, performance of treatment-related tasks, and effective coping with withdrawal symptoms can prolong abstinence from smoking. Programs designed to help quit smoking can benefit from the inclusion of these factors.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Lopez-Torrecillas,F., Rueda,M.M., Lopez-Quirantes,E.M., Santiago,J.M., Tapioles,R.R.
Original/Translated Title
URL
Date of Electronic
20141125
PMCID
PMC4289175
Editors
|
|||
| Magnetic ionic liquids as non-conventional extraction solvents for the determination of polycyclic aromatic hydrocarbons | 2016 | Departamento de Quimica (Area de Quimica Analitica), Universidad de La Laguna (ULL), La Laguna, Tenerife, 38206, Spain. Electronic address: mtrujill@ull.edu.es.; Department of Chemistry, Iowa State University, Ames, IA, 50011, USA. Electronic address: ona | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Analytica Chimica Acta
Periodical, Abbrev.
Anal.Chim.Acta
Pub Date Free Form
31-Aug
Volume
934
Issue
Start Page
106
Other Pages
113
Notes
CI: Copyright (c) 2016; JID: 0370534; OTO: NOTNLM; 2016/05/11 [received]; 2016/06/07 [revised]; 2016/06/08 [accepted]; 2016/06/15 [aheadofprint]; ppublish
Place of Publication
Netherlands
ISSN/ISBN
1873-4324; 0003-2670
Accession Number
PMID: 27506350
Language
eng
SubFile
Journal Article; IM
DOI
10.1016/j.aca.2016.06.014 [doi]
Output Language
Unknown(0)
PMID
27506350
Abstract
This work describes the applicability of magnetic ionic liquids (MILs) in the analytical determination of a group of heavy polycyclic aromatic hydrocarbons. Three different MILs, namely, benzyltrioctylammonium bromotrichloroferrate (III) (MIL A), methoxybenzyltrioctylammonium bromotrichloroferrate (III) (MIL B), and 1,12-di(3-benzylbenzimidazolium) dodecane bis[(trifluoromethyl)sulfonyl)]imide bromotrichloroferrate (III) (MIL C), were designed to exhibit hydrophobic properties, and their performance examined in a microextraction method for hydrophobic analytes. The magnet-assisted approach with these MILs was performed in combination with high performance liquid chromatography and fluorescence detection. The study of the extraction performance showed that MIL A was the most suitable solvent for the extraction of polycyclic aromatic hydrocarbons and under optimum conditions the fast extraction step required approximately 20 muL of MIL A for 10 mL of aqueous sample, 24 mmol L(-1) NaOH, high ionic strength content of NaCl (25% (w/v)), 500 muL of acetone as dispersive solvent, and 5 min of vortex. The desorption step required the aid of an external magnetic field with a strong NdFeB magnet (the separation requires few seconds), two back-extraction steps for polycyclic aromatic hydrocarbons retained in the MIL droplet with n-hexane, evaporation and reconstitution with acetonitrile. The overall method presented limits of detection down to 5 ng L(-1), relative recoveries ranging from 91.5 to 119%, and inter-day reproducibility values (expressed as relative standard derivation) lower than 16.4% for a spiked level of 0.4 mug L(-1) (n = 9). The method was also applied for the analysis of real samples, including tap water, wastewater, and tea infusion.
Descriptors
Links
Book Title
Database
Publisher
Elsevier B.V
Data Source
Authors
Trujillo-Rodriguez,M.J., Nacham,O., Clark,K.D., Pino,V., Anderson,J.L., Ayala,J.H., Afonso,A.M.
Original/Translated Title
URL
Date of Electronic
20160615
PMCID
Editors
|
|||
| An ecological study of lactic acid bacteria from Almagro eggplant fermentation brines | 2007 | Departamento de Quimica Analitica y Tecnologia de Alimentos, Facultad de Ciencias del Medio Ambiente, Campus Tecnologico de la Fabrica de Armas, Toledo, Spain. susana.sprieto@uclm.es | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of applied microbiology
Periodical, Abbrev.
J.Appl.Microbiol.
Pub Date Free Form
Nov
Volume
103
Issue
5
Start Page
1553
Other Pages
1561
Notes
JID: 9706280; 0 (DNA, Bacterial); 0 (Salts); 0 (brine); ppublish
Place of Publication
England
ISSN/ISBN
1364-5072; 1364-5072
Accession Number
PMID: 17953566
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
JAM3387 [pii]
Output Language
Unknown(0)
PMID
17953566
Abstract
AIM: Identification of the predominant lactic acid bacteria (LAB) involved in spontaneous fermentations of Almagro eggplants, and evaluation of the biodiversity by molecular typing. METHODS AND RESULTS: Almagro eggplant fermentations in three factories (A, B and C) enjoying Protected Designation of Origin (PDO) status were monitored by chemical and microbiological analysis of brines. LAB isolates from brines were identified by phenotypic analysis and by species-specific PCR reactions and typed by randomly amplified polymorphic DNA (RAPD)-PCR. All isolates from factories A and C belonged to the genus Lactobacillus (Lact.), whereas isolates from factory B belonged to Lactobacillus (50%), Leuconostoc (Ln.) (25%) and Lactococcus (Lc.) (25%); 1.9% of this microbiota was considered cosmopolitan. The genera Leuconostoc and Lactococcus and the species Lact. acidophilus and Lact. paracasei had never previously been reported in Almagro eggplant fermentations. CONCLUSION: Considerable differences in the composition of the lactic acid microbiota participating in the Almagro eggplant fermentations exist. Brine NaCl concentration has a notable influence both in number and in the species participating. SIGNIFICANCE AND IMPACT OF THE STUDY: The original aspect of this work consists of an ecological study of the LAB taking part in spontaneous Almagro eggplant fermentations from different factories. Participation of Leuconostoc and Lactococcus species and of Lact. acidophilus and Lact. paracasei, which had never before been described for this pickle, and the evidence that a lactic fermentation does not always take place, were the most relevant results.
Descriptors
Biodiversity, Colony Count, Microbial, DNA, Bacterial/analysis, Fermentation, Food Microbiology, Food Preservation, Food Technology, Food-Processing Industry, Lactobacillaceae/genetics/isolation & purification, Lactobacillus/genetics/isolation & purification, Lactobacillus acidophilus/genetics/isolation & purification, Lactococcus/genetics/isolation & purification, Leuconostoc/genetics/isolation & purification, Phenotype, Random Amplified Polymorphic DNA Technique, Salts, Solanum melongena/microbiology
Links
Book Title
Database
Publisher
Data Source
Authors
Sesena,S., Palop,M. L.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
|
|||
| Utilization of a benzyl functionalized polymeric ionic liquid for the sensitive determination of polycyclic aromatic hydrocarbons; parabens and alkylphenols in waters using solid-phase microextraction coupled to gas chromatography-flame ionization detecti | 2010 | Departamento de Quimica Analitica, Nutricion y Bromatologia, Universidad de La Laguna, La Laguna (Tenerife) 38206, Spain. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of chromatography.A
Periodical, Abbrev.
J.Chromatogr.A
Pub Date Free Form
12-Nov
Volume
1217
Issue
46
Start Page
7189
Other Pages
7197
Notes
CI: Copyright (c) 2010; JID: 9318488; 0 (Endocrine Disruptors); 0 (Imidazoles); 0 (Imides); 0 (Ionic Liquids); 0 (Parabens); 0 (Phenols); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); 2010/08/03 [received]; 2010/09/06 [revised]; 2
Place of Publication
Netherlands
ISSN/ISBN
1873-3778; 0021-9673
Accession Number
PMID: 20933234
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; IM
DOI
10.1016/j.chroma.2010.09.016 [doi]
Output Language
Unknown(0)
PMID
20933234
Abstract
The functionalized polymeric ionic liquid poly(1-(4-vinylbenzyl)-3-hexadecylimidazolium bis[(trifluoromethyl)sulfonyl]imide (poly(VBHDIm(+)NTf(2)(-))) has been used as successful coating in solid-phase microextraction (SPME) to determine a group of fourteen endocrine disrupting chemicals (ECDs), including polycyclic aromatic hydrocarbons (PAHs), alkylphenols, and parabens, in several water samples. The performance of the PIL fiber in direct immersion mode SPME followed by gas chromatography (GC) with flame-ionization detection (FID) is characterized with average relative recoveries higher than 96.1% from deionized waters and higher than 76.7% from drinking bottled waters, with precision values (RSD) lower than 13% for deionized waters and lower than 14% for drinking bottled waters (spiked level of 1 ng mL(-1)), when using an extraction time of 60 min with 20 mL of aqueous sample. Detection limits varied between 9 ng L(-1) and 7 ng mL(-1). A group of real water samples, including drinking waters, well waters, and swimming pool waters, have been analyzed under the optimized conditions. A comparison has also been carried out with the commercial SPME coatings: polydimethylsyloxane (PDMS) 30 mum, and polyacrylate (PA) 85 mum. The functionalized PIL fiber ( approximately 12 mum) demonstrated to be superior to both commercial fibers for the overall group of analytes studied, in spite of its lower coating thickness. A normalized sensitivity parameter is proposed as a qualitative tool to compare among fiber materials, being higher for the poly(VBHDIm(+)NTf(2)(-)) coating. Furthermore, the partition coefficients of the studied analytes to the coating materials have been determined. A quantitative comparison among the partition coefficients also demonstrates the superior extraction capability of the functionalized PIL sorbent coating.
Descriptors
Endocrine Disruptors/analysis/isolation & purification, Gas Chromatography-Mass Spectrometry/methods, Imidazoles/chemistry, Imides/chemistry, Ionic Liquids/chemistry, Parabens/analysis/isolation & purification, Phenols/analysis/isolation & purification, Polycyclic Hydrocarbons, Aromatic/analysis/isolation & purification, Reproducibility of Results, Sensitivity and Specificity, Solid Phase Microextraction/methods, Water Pollutants, Chemical/analysis/isolation & purification
Links
Book Title
Database
Publisher
Elsevier B.V
Data Source
Authors
Lopez-Darias,J., Pino,V., Meng,Y., Anderson,J. L., Afonso,A. M.
Original/Translated Title
URL
Date of Electronic
20100921
PMCID
Editors
|
|||
| Comparison of two extraction methods for the determination of polycyclic aromatic hydrocarbons in surface soils using headspace SPME with GC-FID | 2009 | Departamento de Quimica Aplicada, Facultad de Quimica, Universidad del Pais Vasco, Apdo. 1072, 20080, San Sebastian, Spain. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of chromatographic science
Periodical, Abbrev.
J.Chromatogr.Sci.
Pub Date Free Form
Feb
Volume
47
Issue
2
Start Page
97
Other Pages
102
Notes
JID: 0173225; 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Soil); 0 (Soil Pollutants); ppublish
Place of Publication
United States
ISSN/ISBN
0021-9665; 0021-9665
Accession Number
PMID: 19222916
Language
eng
SubFile
Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Validation Studies; IM
DOI
Output Language
Unknown(0)
PMID
19222916
Abstract
Two simple methods using headspace solid-phase microextraction (HS-SPME) coupled to a gas chromatograph with a flame ionization detector were compared for the determination of polycyclic aromatic hydrocarbons (PAH) in soils. These compounds were included in the US Environmental Protection Agency's Priority Pollutants list. Direct hot water HS-SPME extraction and sonication organic extraction followed by HS-SPME were optimized using experimental designs. The first method was chosen for PAH determination. The validation of the proposed method was carried out by analyzing PAHs in the certified soil reference material RTC-CRM 123. The accuracy obtained for the PAHs was shown to be inside the prediction interval with the certified material. The optimized method was applied to the analysis of several superficial soils from Gipuzkoa (Basque Country, North Spain).
Descriptors
Chromatography, Gas/methods, Flame Ionization, Polycyclic Hydrocarbons, Aromatic/analysis, Reproducibility of Results, Soil/analysis, Soil Pollutants/analysis, Solid Phase Microextraction/methods, Spain
Links
Book Title
Database
Publisher
Data Source
Authors
Zuazagoitia,D., Millan,E., Garcia-Arrona,R.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
|
|||
| Simultaneous determination of pesticides, polycyclic aromatic hydrocarbons and polychlorinated biphenyls in seawater and interstitial marine water samples, using stir bar sorptive extraction-thermal desorption-gas chromatography-mass spectrometry | 2007 | Departamento de Quimica Fisica, Facultad de Ciencias del Mar y Ambientales, Universidad de Cadiz, Campus Rio San Pedro s/n 11510 Puerto Real, Cadiz, Spain. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of chromatography.A
Periodical, Abbrev.
J.Chromatogr.A
Pub Date Free Form
2-Nov
Volume
1170
Issue
2-Jan
Start Page
82
Other Pages
90
Notes
LR: 20131121; JID: 9318488; 0 (Pesticide Residues); 0 (Pesticides); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); 4M7FS82U08 (Dichlorodiphenyl Dichloroethylene); DFC2HB4I0K (Polychlorinated Biphenyls); 2007/06/14 [received]; 2007/
Place of Publication
Netherlands
ISSN/ISBN
0021-9673; 0021-9673
Accession Number
PMID: 17915232
Language
eng
SubFile
Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
S0021-9673(07)01551-8 [pii]
Output Language
Unknown(0)
PMID
17915232
Abstract
A method for the simultaneous determination of semi-volatile organic contaminants (polycyclic aromatic hydrocarbons, polychlorinated biphenyls, organochlorine and organophosphorus pesticides) in marine samples has been developed, for the first time, using the stir bar sorptive extraction technique (SBSE) and thermal desorption coupled to capillary gas chromatography-mass spectrometry (SBSE-TD-GC-MS). Polydimethyl siloxane (PDMS) was used for the extraction of the selected analytes and two procedures have been optimised and validated, one for seawater samples (100 mL) and another for interstitial water samples (10 mL), using PDMS stir bars of 20 mm and 10 mm size, respectively. The extraction and analytical conditions, such as extraction time, matrix effects, sample volume and desorption time, were optimised. The proposed methods are sensitive, simple and show good linearity and detection limits lower than 1 ng L(-1) with seawater and lower than 10 ng L(-1) with interstitial marine water for the majority of compounds tested. Repeatability and reproducibility, expressed as relative standard deviation, have values lower than 20% for the majority of analytes considered. The recoveries for both sample volume procedures are higher than 60 and 70% for 10 and 100 mL, respectively, except for the more apolar (some PAHs and PCBs) and the more polar (some triazines) analytes which present lower values. The present SBSE/GC/MS method was applied for the analysis of trace organic contaminants in seawater and interstitial water samples from Cadiz Bay (SW of Spain). Terbutylazine, DDX and some PAHs were found at several seawater sampling points at ng L(-1) levels, and some PAHs in interstitial water too.
Descriptors
Adsorption, Chemical Fractionation/methods, Dichlorodiphenyl Dichloroethylene/analysis, Gas Chromatography-Mass Spectrometry/instrumentation/methods, Hot Temperature, Pesticide Residues/analysis, Pesticides/analysis, Polychlorinated Biphenyls/analysis, Polycyclic Hydrocarbons, Aromatic/analysis, Reproducibility of Results, Seawater/chemistry, Sensitivity and Specificity, Volatilization, Water Pollutants, Chemical/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
Perez-Carrera,E., Leon,V. M., Parra,A. G., Gonzalez-Mazo,E.
Original/Translated Title
URL
Date of Electronic
20070914
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| Chemical composition of the essential oil and fixed oil Bauhinia pentandra (Bong.) D. Dietr | 2015 | Departamento de Quimica Organica e Inorganica, Universidade Federal do Ceara, Fortaleza-CE, Brazil.; Departamento de Quimica Organica e Inorganica, Universidade Federal do Ceara, Fortaleza-CE, Brazil.; Departamento de Quimica Organica e Inorganica, Univer | Read more... |
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Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Pharmacognosy magazine
Periodical, Abbrev.
Pharmacogn Mag.
Pub Date Free Form
Oct
Volume
11
Issue
Suppl 2
Start Page
S362
Other Pages
4
Notes
JID: 101300403; OTO: NOTNLM; ppublish
Place of Publication
India
ISSN/ISBN
0973-1296; 0973-1296
Accession Number
PMID: 26664026
Language
eng
SubFile
Journal Article
DOI
10.4103/0973-1296.166015 [doi]
Output Language
Unknown(0)
PMID
26664026
Abstract
BACKGROUND: Bauhinia pentandrais popularly known as "mororo" and inhabits the Caatinga and Savannah biomes. OBJECTIVE: This paper reports the chemical composition of the essential and fatty oils of the leaves from B. pentandra. MATERIALS AND METHODS: The essential oil was obtained by hydrodistillation and the fixed oil by extraction with hexane, followed by saponification with KOH/MeOH, and methylation using MeOH/HCl. The constituents were analyzed by gas chromatography-mass spectrometry. RESULTS: The major constituent of the essential oil was the phytol (58.78% +/-8.51%), and of the fatty oil were palmitic (29.03%), stearic (28.58%) and linolenic (10.53%) acids. CONCLUSION: Of the compounds identified in the essential oil, three are first reported in this species, and this is the first record of the chemical composition of the fixed oil.
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Data Source
Authors
de Almeida,M.C., Souza,L.G., Ferreira,D.A., Monte,F.J., Braz-Filho,R., de Lemos,T.L.
Original/Translated Title
URL
Date of Electronic
PMCID
PMC4653348
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