Search results for "ZOL"
showing 10 items of 4792 documents
In situ derivatization for double confirmation of 2C–C in oral fluids by ion mobility spectrometry
2017
Ion mobility spectrometry (IMS) is a powerful tool to carry out quick and sensitive detection of illicit activities and has been employed for the determination of the psychedelic drug 2,5-dimethoxy-4 chlorophenethylamine (2C–C) in oral fluid samples. Saliva samples were extracted with chloroform and analysed by IMS reaching a limit of detection (LOD) of 14 μg L−1. Nevertheless, IMS has a scarce resolution and selectivity of the method can be often compromised by the presence of potential interferents with similar molecular weights and drift times. Thus, a rapid and in situ derivatization with acetone, to form the corresponding imine, has been proposed in the present study to confirm the pre…
A conjugated polymer with ethyl 2-(2-(pyridin-2-yl)-1H-benzo[d]imidazol-1-yl) acetate units as a novel fluorescent chemosensor for silver(I) detection
2013
Abstract A novel conjugated polymer ( P1 ) containing fluorene and ethyl 2-(2-(pyridin-2-yl)-1 H -benzo[ d ]imidazol-1-yl)acetate (PBMA) was designed and successfully synthesized through the Sonogashira coupling reaction. P1 shows high sensitivity and selectivity for Ag + detection in comparison to other metal cations. Upon addition of Ag + , the fluorescent emission of the polymer solution in THF was quenched dramatically, accompanying the color changed from blue to green. The detection limit for Ag + was 5 × 10 −8 mol L −1 . However, the similar copolymers P2 and P3 containing 2-(pyridin-2-yl)-1 H -benzo[ d ]imidazole and 2-(thiophen-2-yl)-1 H -benzo[ d ]imidazole, respectively, did not …
Capillary zone electrophoresis for the determination of thiabendazole, prochloraz and procymidone in grapes
2001
Capillary zone electrophoresis with UV detection was applied to the simultaneous determination of thiabendazole, prochloraz and procymidone in grapes. Electrolyte conditions such as pH, composition and concentration of the buffer, addition of organic solvent and working voltage were checked to obtain a high-performance separation of the three fungicides (by measurement of separation efficiency and resolution). The most critical parameter was the pH of the running buffer. The best separation was achieved in 4 mM phosphate solution at pH 3.5. The repeatability of the migration times, expressed as RSD, was <0.44%. The three peaks were completely resolved with a separation efficiency up to 100 …
Analysis of thiabendazole and procymidone in fruits and vegetables by capillary electrophoresis–electrospray mass spectrometry
2002
Abstract A capillary electrophoresis–mass spectrometry method for determining procymidone and thiabendazole in apples, grapes, oranges, pears, strawberries and tomatoes is described. Separation is achieved using a buffer of formic acid–ammonium formate at pH 3.5 with 2% of methanol. Fungicide residues present in the sample are preconcentrated by both solid-phase extraction and injection of large sample volumes into the capillary by a stacking technique, to obtain lower detection limits. Ionization is performed at atmospheric pressure in an electrospray type source and detection is carried out using positive ionization and selected ion monitoring modes. The quantitation limits are 0.005 and …
Robotizētu procesu automatizācijas risinājumu piegāde
2019
Bakalaura darba mērķis ir izanalizēt un pētīt programmatūras piegādes specifiku un tās darbības izolācijas paņēmienus, kā arī pētīt un salīdzināt gan maksas, gan atvērtā pirmkoda robotizētu procesu automatizācijas platformu sniegtās iespējas un piegādes īpatnības. Bakalaura darbā sākotnēji tiek pētīts programmatūras piegādes process un šī procesa automatizācija, izvērtējot automatizēto risinājumu prasības un ieguvumus. Tālākajā darba gaitā tiek izpētīta piegādātās programmatūras izolācija, izvērtējot iespējamo variantu pozitīvās un negatīvās iezīmes. Turpmākajā darba gaitā tiek pētītas gan atvērtā pirmkoda, gan maksas robotizētu procesu automatizācijas izstrādes platformas, izvērtējot to sn…
CCDC 960138: Experimental Crystal Structure Determination
2013
Related Article: Mainak Mitra, Julio Lloret-Fillol, Matti Haukka, Miquel Costas, Ebbe Nordlander|2014|Chem.Commun.|50|1408|doi:10.1039/C3CC47830K
CCDC 890481: Experimental Crystal Structure Determination
2013
Related Article: C.R.de Arellano, E.Escriva, C.J.Gomez-Garcia, G.M.Espallargas, R.Ballesteros, B.Abarca|2013|CrystEngComm|15|1836|doi:10.1039/c2ce26654g
Pesticides in the Ebro River basin: Occurrence and risk assessment
2016
In this study, 50 pesticides were analyzed in the Ebro River basin in 2010 and 2011 to assess their impact in water, sediment and biota. A special emphasis was placed on the potential effects of both, individual pesticides and their mixtures, in three trophic levels (algae, daphnia and fish) using Risk Quotients (RQs) and Toxic Units (TUs) for water and sediments. Chlorpyrifos, diazinon and carbendazim were the most frequent in water (95, 95 and 70% of the samples, respectively). Imazalil (409.73 ng/L) and diuron (150 ng/L) were at the highest concentrations. Sediment and biota were less contaminated. Chlorpyrifos, diazinon and diclofenthion were the most frequent in sediments (82, 45 and 2…
Diazonamīda A neciklisko analogu sintēze
2019
Diazonamīda A neciklisko analogu sintēze. Vasiļevska A., zinātniskie vadītāji: prof., Dr. chem. Sūna E., Mg. chem. Kazak M. Maģistra darbs, 78 lappuses, 70 attēli, 6 tabulas, 81 literatūras avots. Latviešu valodā. Darbā veikta diazonamīda A neciklosko analogu sintēze, izmantojot litiētā 2,4’-bioksazola reakciju ar ketoniem un Negishi šķērssametināšanu. Ir izstrādātās divas metodes 2,4’-bioksazolu sintēzei. Literatūras apskatā aplūkota informācija par 2,4’-bioksazolu sintēzes metodēm un 2,4’-bioksazola modificēšanas iespējām C5’ pozīcijā.
CCDC 127933: Experimental Crystal Structure Determination
2001
Related Article: S.Kiviniemi, M.Nissinen, M.T.Lamsa, J.Jalonen, K.Rissanen, J.Pursiainen|2000|New J.Chem.|24|47|doi:10.1039/a907608e