scholarly journals Production of Surface Active Organic Material and Reduced Sulfur Species During the Growth of Marine Diatom Cylindrotheca closterium

2018 ◽  
Vol 91 (4) ◽  
Author(s):  
Irena Ciglenečki ◽  
Jelena Dautović ◽  
Ana Cvitešić ◽  
Galja Pletikapić
Keyword(s):  
Organic Material ◽  
Marine Diatom ◽  
Sulfur Species ◽  
Cylindrotheca Closterium ◽  
Surface Active ◽  
Reduced Sulfur

Effect of Reduced Sulfur Species on Chemolithoautotrophic Pyrite Oxidation with Nitrate

2018 ◽  
Vol 36 (1) ◽  
pp. 19-29 ◽  
Author(s):  
Ruiwen Yan ◽  
Andreas Kappler ◽  
E. Marie Muehe ◽  
Klaus-Holger Knorr ◽  
Marcus A. Horn ◽  
...  
Keyword(s):  
Pyrite Oxidation ◽  
Sulfur Species ◽  
Reduced Sulfur

Photosynthetic rate of the marine diatom Cylindrotheca closterium

1967 ◽  
Vol 18 (2) ◽  
pp. 123 ◽  
Author(s):  
GF Humphrey ◽  
DV Subba Rao
Keyword(s):  
Blue Light ◽  
Photosynthetic Rate ◽  
White Light ◽  
Culture Medium ◽  
Spectral Composition ◽  
Compensation Point ◽  
Marine Diatom ◽  
Ph Change ◽  
Cylindrotheca Closterium

Photosynthesis in Cylindrotheca closterium was greatest in 1-day-old cells (2-4 � O2 per 106 cells per hour), declining to about 50% of this at 3 days and to about 10 % at 14 days. Due mainly to a decrease in the intensity of photosynthesis the ratio of photosynthesis to respiration fell from 6-8 at 1 day to 34 at 3 days, and to 0.6-1.6 at 14 days. The decline in photosynthesis started before phosphate or nitrate in the culture medium was exhausted, but was accompanied by a pH change from 7.4 before inoculation to 8.4 at 1 day and 9.2 at 3 days and thereafter. White light of 1000-1500f.c. (6.4-9.6 mW/cm2) saturated photosynthesis, the compensation point varying from 50 to 100 f.c. (0.3-0.6 mW/cm2). In blue light similar in spectral composition to that found at 10m below the surface of the ocean, the compensation point was 0.5-0.6 mW/cm2.

scholarly journals Electrochemical Evidence of non-Volatile Reduced Sulfur Species in Water-Soluble Fraction of Fine Marine Aerosols

Atmosphere ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 674 ◽  
Author(s):  
Ana Cvitešić Kušan ◽  
Sanja Frka ◽  
Irena Ciglenečki
Keyword(s):  
Natural Waters ◽  
Soluble Fraction ◽  
Mercury Electrode ◽  
Water Soluble ◽  
Organic Carbon Content ◽  
Marine Aerosols ◽  
Sulfur Species ◽  
Water Soluble Fraction ◽  
Enhanced Solubility ◽  
Reduced Sulfur

The traditional voltammetric method at the mercury electrode, and an acidification step developed for the determination of reduced sulfur species (RSS) in natural waters, was for the first time used for the quantification of RSS in the water-soluble fraction of fine marine aerosols collected at the Middle Adriatic location (Rogoznica Lake). The evidence of two types of non-volatile RSS that have different interaction with the Hg electrode was confirmed: mercapto-type which complexes Hg as RS–Hg and sulfide/S0-like compounds which deposits HgS. The analytical protocol that was used for RSS determination in aerosol samples is based on separate voltammetric studies of a methyl 3-mercaptopropionate (3-MPA) as a representative of mercapto-type compounds and sulfide as a representative of inorganic RSS. Our preliminary study indicates the presence of mainly RS–Hg compounds in spring samples, ranging from 2.60–15.40 ng m−3, while both, the mercapto-type (0.48–2.23 ng m−3) and sulfide and/or S0-like compounds (0.02–0.26 ng m−3) were detected in early autumn samples. More expressed and defined RS–Hg peaks recorded in the spring potentially indicate their association with biological activity in the area. Those samples were also characterized by a higher water-soluble organic carbon content and a more abundant surface-active fraction, pointing to enhanced solubility and stabilization of RSS in the aqueous atmospheric phase.

Flammability of CS2 and other reduced sulfur species

2017 ◽  
Vol 91 ◽  
pp. 226-234 ◽  
Author(s):  
Zhe Zeng ◽  
Bogdan Z. Dlugogorski ◽  
Mohammednoor Altarawneh
Keyword(s):  
Sulfur Species ◽  
Reduced Sulfur

scholarly journals Oxidation of Reduced Sulfur Species: Carbon Disulfide

2014 ◽  
Vol 118 (34) ◽  
pp. 6798-6809 ◽  
Author(s):  
Peter Glarborg ◽  
Birgitte Halaburt ◽  
Paul Marshall ◽  
Adrian Guillory ◽  
Jürgen Troe ◽  
...  
Keyword(s):  
Carbon Disulfide ◽  
Sulfur Species ◽  
Reduced Sulfur
Sign in / Sign up

Export Citation Format

Share Document