scholarly journals Supplemental Material: Volcanic origin of the mercury anomalies at the Cretaceous-Paleogene transition of Bidart, France

2021 ◽  
Author(s):  
Eric Font ◽  
et al.
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Analytical Methods ◽  
Isotope Composition ◽  
Volcanic Origin

Detailed analytical methods, Table S1 (Hg concentration, total organic carbon, and Ir concentration of the Bidart samples), Table S2 (Hg isotope composition of the Bidart samples), and methods.<br>

scholarly journals Supplemental Material: Volcanic origin of the mercury anomalies at the Cretaceous-Paleogene transition of Bidart, France

2021 ◽  
Author(s):  
Eric Font ◽  
et al.
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Analytical Methods ◽  
Isotope Composition ◽  
Volcanic Origin

Detailed analytical methods, Table S1 (Hg concentration, total organic carbon, and Ir concentration of the Bidart samples), Table S2 (Hg isotope composition of the Bidart samples), and methods.<br>

Selective quantification of nanoplastics in environmental matrices by asymmetric flow field – flow fractionation with total organic carbon detection

2021 ◽  
Author(s):  
Marfua Mowla ◽  
Sheyda Shakiba ◽  
Stacey M Louie
Keyword(s):  
Organic Carbon ◽  
Flow Field ◽  
Total Organic Carbon ◽  
Analytical Methods ◽  
Environmental Pollutants ◽  
Fate And Transport ◽  
Field Flow Fractionation ◽  
Environmental Matrices ◽  
Asymmetric Flow ◽  
Carbon Detection

Nanoplastics are of rapidly emerging concern as ubiquitous environmental pollutants. However, fate and transport assessments are currently hindered by a need for new analytical methods that can selectively quantify nanoplastics...

CHARACTERISATION OF DISSOLVED ORGANIC CARBON (DOC) LEACHED FROM LEAVES IN WATER

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Markus Heryanto Langsa
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Total Organic Carbon ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Mass Spectrometry ◽  
Pinus Radiate

<p>Penelitian ini bertujuan untuk menentukan senyawa organik khususnya organic karbon terlarut (DOC) dari dua spesies daun tumbuhan (<em>wandoo eucalyptus </em>and <em>pinus radiate, conifer</em>) yang larut dalam air selama periode 5 bulan leaching eksperimen. Kecepatan melarutnya senyawa organic ditentukan secara kuantitatif dan kualitatif menggunakan kombinasi dari beberapa teknik diantaranya Total Organic Carbon (TOC) analyser, Ultraviolet-Visible (UV-VIS) spektrokopi dan pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS).</p><p>Hasil analisis DOC dan UV menunjukkan peningkatan yang tajam dari kelarutan senyawa organic di awal periode pengamatan yang selanjutnya berkurang seiring dengan waktu secara eksponensial. Jumlah relatif senyawa organic yang terlarut tergantung pada luas permukaan, aktifitas mikrobiologi dan jenis sampel tumbuhan (segar atau kering) yang digunakan. Fluktuasi profil DOC dan UV<sub>254</sub> disebabkan oleh aktifitas mikrobiologi. Diperoleh bahwa daun kering lebih mudah terdegradasi menghasilkan senyawa organic dalam air dibandingkan dengan daun segar. Hasil pyrolysis secara umum menunjukkan bahwa senyawa hidrokarbon aromatic dan fenol (dan turunannya) lebih banyak ditemukan pada residue sampel setelah proses leaching kemungkinan karena adanya senyawa lignin atau aktifitas humifikasi mikrobiologi membuktikan bahwa senyawa-senyawa tersebut merupakan komponen penting dalam proses karakterisasi DOC.</p>

Parameters for Measuring the Activity and Viability of Activated Sludge

1974 ◽  
Vol 9 (1) ◽  
pp. 235-249 ◽  
Author(s):  
S.G. Nutt ◽  
K.L. Murphy
Keyword(s):  
Organic Carbon ◽  
Activated Sludge ◽  
Biological System ◽  
Analytical Methods ◽  
Heterogeneous System ◽  
Removal Rate ◽  
Bacterial Species ◽  
Atp Content ◽  
Culture Studies ◽  
Activated Sludge System

Abstract Conventional wastewater parameters are accepted as inadequate estimates of the condition of activated sludge but numerous other indices have been suggested as specific measurements of the activity and viability of the biomass. Literature in the related fields of microbiology and biochemistry were reviewed in order to select the most appropriate activity parameters for application to a heterogeneous biological material. Modified analytical methods were applied to a well-controlled biological system containing a single predominant bacterial species to evaluate the relative merit of each as an indicator of viability and activity. The potential of each parameter in a complex heterogeneous system was determined by monitoring each index in a bench activated sludge system. The predominant culture studies indicated that the ATP content of the biomass and the dehydrogenase activity were potential indicators of cell viability in a simple system. However, in the complex activated sludge system, only the ATP content showed significant correlation to the organic carbon removal rate.

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