Results 261 to 270 of about 2,342 (296)

Direct, microwave-assisted substitution of anomeric nitrate-esters

Carbohydrate Research, 2017
A series of carbohydrate 2-azido-1-nitrate-esters, protected at the C-3, C-4, and C-6 positions, were hydrolyzed thermally under reagent free conditions. This preliminary result was extended to direct exchange of the 1-nitrate-ester modality for alcohol, alkoxy, and azide coupling partners with minimal purification.
D Jamin, Keith, Steven D, Townsend
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Direct Observation of ClO from Chlorine Nitrate Photolysis

Science, 1992
Chlorine nitrate photolysis has been investigated with the use of a molecular beam technique. Excitation at both 248 and 193 nanometers led to photodissociation by two pathways, ClONO 2 → ClO + NO 2 and ClONO 2 → Cl + NO 3 , with comparable ...
T K, Minton, C M, Nelson, T A, Moore, M, Okumura   +3 more
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Integrated Assessment of Water Framework Directive Nitrate Reduction Measures

SSRN Electronic Journal, 2008
AbstractThis article illustrates a statistical approach for deriving farm economic impacts of policy options aiming to reduce nitrate diffuse pollution. Building upon Fezzi et al. (2008), who assess the costs of Water Framework Directive‐related measures on farm accounts data, we estimate regression models allowing such costs to be predicted for any ...
Fezzi, Carlo, Hutchins, Michael, Rigby, Dan, Bateman, Ian J., Posen, Paulette, Hadley, David   +5 more
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Direct Potentiometric Measurement of Nitrate in Seeds and Produce

Communications in Soil Science and Plant Analysis, 2003
A highly stable and selective nitrate sensor was utilized for the development of a new methodology for the direct determination of nitrate concentration in dried greens and seeds. The method developed allows for the accurate (100–102% recovery values in lettuce, olive leaves and coffee beans) and fast (4 to 8 minutes) analysis of the samples without ...
E. Geniatakis, M. Fouskaki, N. A. Chaniotakis   +2 more
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Direct Titration of Nitrate with Diphenylthallium(III) Sulfate

Analytical Letters, 1968
Abstract Nitrate may be titrated with diphenylthallium(III) sulfate. The titration may be monitored amperometrically or potentiometrically. Fluoride, perchlorate, sulfate and phosphate do not interfere. Chloride, bromide and iodide interfere and must be removed. For amperometric titration, the range is 5 – 22 × 10−3 M nitrate.
Joseph S. Digregorio, Michael D. Morris
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Proposed Direct Ultraviolet Determination of Nitrate

Journal AWWA, 1967
This article discusses the absorbance of an acidified potable water sample containing nitrate ion that is measured at 206 mµ against a similarly acidified distilled water blank. A standard curve is prepared in a similar manner, using standard concentrations of nitrate ion.
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CHANGES IN QUALITY OF SURFACE AND GROUND WATERS DURING IMPLEMENTATION OF NITRATES DIRECTIVE IN SELECTED AGRICULTURAL RIVER BASIN OF WESTERN POMERANIA

Inżynieria Ekologiczna, 2015
Polska w ramach szeroko pojętej polityki zrównoważonego rozwoju oraz zobowiązań międzynarodowych, wynikających z Ramowej Dyrektywy Wodnej, a szczególnie Dyrektywy Azotanowej zobligowana jest do realizacji działań związanych z ochroną jakości wody przed ...
Durkowski, T., Jarnuszewski, G.
exaly   +2 more sources

Direct Electrochemistry with Nitrate Reductase in Chitosan Films

Journal of the Chinese Chemical Society, 2004
AbstractStable films made from chitosan (CS) on pyrolytic graphite (PG) electrode gave direct electrochemistry for incorporated enzyme nitrate reductase (NR). Cyclic voltammetry (CV) of NR‐CS films showed a pair of well‐defined and nearly reversible redox peaks at about −0.430 V vs.
Yaru Song, Xiaoxia Chen, Hong Wu, Huibo Shao   +3 more
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Direct Nitration of 3-Arylamino-2-chloro-1,4-naphthoquinones

Synthesis, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Thida Win, Sarit Yerushalmi, Shmuel Bittner   +2 more
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Implementation of the eu nitrates directive in Turkey

2014
AB Nitrat Direktifi, tarımsal faaliyetlerden kaynaklanan nitrat kirliliğinin azaltılması ve önlenmesine yönelik doğal kaynakların sürdürülebilirliliği açısından önemli bir direktif olup AB Su Çerçeve Direktifi’nin bütünleyici bir parçasıdır. Avrupa Konseyi tarafından 1991 yılında kabul edilen direktif, 2004 yılında Türkiye’de Tarımsal Kaynaklı Nitrat ...
BİLGİN YILDIRIM, Hatice, DEMİR, Süleyman   +1 more
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