To standardize by mass of soil or organic carbon? A comparison of permanganate oxidizable carbon (POXC) assay methods

Geoderma ◽  
2021 ◽  
Vol 404 ◽  
pp. 115392
Author(s):  
Jordon Wade ◽  
Chongyang Li ◽  
Mirjam M. Pulleman ◽  
Grace Trankina ◽  
Skye A. Wills ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Assay Methods

Regrowth of bacteria on assimilable organic carbon in drinking water

1985 ◽  
Vol 16 (3) ◽  
pp. 201-218 ◽  
Author(s):  
D. Van der Kooij ◽  
W.A.M. Hijnen
Keyword(s):  
Drinking Water ◽  
Organic Carbon ◽  
Assimilable Organic Carbon

Lack of Agreement of Chromogenic and Glotting Assays for Factor X and Protein C in Warfarinised Plasma

1991 ◽  
Vol 65 (04) ◽  
pp. 360-363 ◽  
Author(s):  
P Han ◽  
K P Fung ◽  
U Rahdakrishnan
Keyword(s):  
Serine Proteases ◽  
Protein C ◽  
Warfarin Therapy ◽  
Intraclass Correlation ◽  
Chromogenic Substrate ◽  
Factor X ◽  
Laboratory Automation ◽  
Quantitative Results ◽  
Assay Methods

SummaryCoagulation serine proteases can be measured with either a chromogenic substrate assay or a clotting assay using deficient plasmas. It is a concern whether both assays give similar quantitative results, in particular in plasma obtained fiom patients on long term warfarin therapy. If these two assay methods were interchangeable, then the chromogenic substrate assay has the advantages of precision as well as laboratory automation. We used the intraclass correlation coefficient (r1) to assess the agreement between the two methods in measuring factor X and protein C levels in warfarinised plasma. The results indicate that the extent and pattern of agreement of the two methods for the measurement of the two variables in warfarinised plasma are poor, despite high Pearson product moment coefficients of correlation.

Assay Methods and Standard Preparations for Plasmin, Plasminogen and Urokinase in Purified Systems, 1967-1968

1969 ◽  
Vol 21 (02) ◽  
pp. 259-272 ◽  
Author(s):  
A. J Johnson ◽  
D. L Kline ◽  
Norma Alkjaersig
Keyword(s):  
Heart Institute ◽  
Thrombolytic Agents ◽  
National Heart ◽  
Assay Methods

SummaryTo facilitate communication between investigators, the Committee on Thrombolytic Agents of the National Heart Institute suggests standardized reagents and assay methods for the measurement of standard preparations of plasmin, plasminogen, and urokinase with use of casein, fibrin and synthetic esters as substrates.

A Collaborative Study Designed to Establish the 4th International Standard for Heparin

1984 ◽  
Vol 52 (02) ◽  
pp. 148-153 ◽  
Author(s):  
D P Thomas ◽  
A D Curtis ◽  
T W Barrowcliffe
Keyword(s):  
Collaborative Study ◽  
International Standard ◽  
Thrombin Inhibition ◽  
Freeze Dried ◽  
Assay Methods ◽  
The Mean ◽  
International Collaborative ◽  
International Collaborative Study

SummaryAn international collaborative study, in which 22 laboratories participated, was carried out to establish a replacement for the International Standard for Heparin. A total of 248 assays were analyzed, including APTT, thrombin inhibition and anti-Xa assays, as well as pharmacopoeial assays. Overall, there was less than 5% difference in the mean potency estimates of the candidate preparations, by all assay methods. The freeze-dried preparation 82/502 demonstrated the closest parallelism by bioassay to the existing standard and was established by WHO as the 4th International Standard for Heparin, with an assigned unitage of 1780 i.u. per ampoule.

Deployable Decentralized Biofilm System to Degrade Organic Carbon, Nutrients and Benzene from Wastewater

2009 ◽  
Author(s):  
Dong Chen ◽  
Che-Jen Lin ◽  
R. Gavin Jones ◽  
Sehul Patel ◽  
Rachelle Smith ◽  
...  
Keyword(s):  
Organic Carbon

Photocatalytic degradation of methylene blue from aqueous solutions using nanopillars-TiO2 thin films: Batch reactor studies

2018 ◽  
Vol 18 (3) ◽  
pp. 81-91 ◽  
Author(s):  
C. Lalhriatpuia
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Organic Carbon ◽  
Photocatalytic Degradation ◽  
Batch Reactor ◽  
Tio2 Thin Films ◽  
Initial Concentration ◽  
Bet Specific Surface Area ◽  
Interfering Ions

Nanopillars-TiO2 thin films was obtained on a borosilicate glass substrate with (S1) and without (S2) polyethylene glycol as template. The photocatalytic behaviour of S1 and S2 thin films was assessed inthe degradation of methylene blue (MB) dye from aqueous solution under batch reactor operations. The thin films were characterized by the SEM, XRD, FTIR and AFM analytical methods. BET specific surface area and pore sizes were also obtained. The XRD data confirmed that the TiO2 particles are in its anatase mineral phase. The SEM and AFM images indicated the catalyst is composed with nanosized pillars of TiO2, evenly distributed on the surface of the substrate. The BET specific surface area and pore sizes of S1 and S2 catalyst were found to be 5.217 and 1.420 m2/g and 7.77 and 4.16 nm respectively. The photocatalytic degradation of MB was well studied at wide range of physico-chemical parameters. The effect of solution pH (pH 4.0 to 10.0) and MB initial concentration (1.0 to 10.0 mg/L) was extensively studied and the effect of several interfering ions, i.e., cadmium nitrate, copper sulfate, zinc chloride, sodium chloride, sodium nitrate, sodium nitrite, glycine, oxalic acid and EDTA in the photocatalytic degradation of MB was demonstrated. The maximum percent removal of MB was observed at pH 8.0 beyond which it started decreasing and a low initial concentration of the pollutant highly favoured the photocatalytic degradation using thin films and the presence of several interfering ions diminished the photocatalytic activity of thin films to some extent. The overall photocatalytic activity was in the order: S2 > S1 > UV. The photocatalytic degradation of MB was followed the pseudo-first-order rate kinetics. The mineralization of MB was studied with total organic carbon measurement using the TOC (total organic carbon) analysis.

Contribution of transparent exopolymeric particles (TEP) to estuarine particulate organic carbon pool

2015 ◽  
Vol 529 ◽  
pp. 17-34 ◽  
Author(s):  
S Annane ◽  
L St-Amand ◽  
M Starr ◽  
E Pelletier ◽  
GA Ferreyra
Keyword(s):  
Organic Carbon ◽  
Particulate Organic Carbon ◽  
Carbon Pool ◽  
Organic Carbon Pool ◽  
Transparent Exopolymeric Particles

Large variability in organic carbon and CaCO3 burial in seagrass meadows: a case study from three Australian estuaries

2019 ◽  
Vol 616 ◽  
pp. 211-218 ◽  
Author(s):  
CJ Sanders ◽  
DT Maher ◽  
JM Smoak ◽  
BD Eyre
Keyword(s):  
Organic Carbon ◽  
Large Variability ◽  
Seagrass Meadows
Sign in / Sign up

Export Citation Format

Share Document