Development of a deep-sea hydrogen sulfide ion sensor and its application for submarine hydrothermal plume exploration

2015 ◽  
Vol 49 (6) ◽  
pp. 603-611 ◽  
Author(s):  
Kei Okamura ◽  
Taku Sugiyama ◽  
Takuroh Noguchi ◽  
Tatsuhiro Fukuba ◽  
Kyoko Okino
Keyword(s):  
Hydrogen Sulfide ◽  
Deep Sea ◽  
Hydrothermal Plume ◽  
Ion Sensor ◽  
Sulfide Ion

Residual phase lignin in haft cooking related to the conditions in the cook

1997 ◽  
Vol 12 (4) ◽  
pp. 225-229
Author(s):  
Cart-in A-S. Gustavsson ◽  
Chritofer T. Lindgren ◽  
Mikael E. Lindström
Keyword(s):  
Hydrogen Sulfide ◽  
Ionic Strength ◽  
Sodium Ion ◽  
Ion Concentration ◽  
Constant Composition ◽  
Hydroxide Ion ◽  
Sulfide Ion ◽  
Residual Phase ◽  
Kraft Cooking ◽  
Very High

Abstract The amount of lignin reacting according to the slow residual phase, i.e. the residual phase lignin, is in many perspectives an interesting issue. The purpose of the present investigation was to develop a mathematical model to show how the amount of residual phase lignin in the kraft cooking of spruce chips (Picm ahies) depends on the conditions in the earlier phases of the cook. The variables studied were hydroxide ion concentration, hydrogen sulfide ion concentration and ionic strength. The liquor-to-wood ratio during pulping was very high to maintain approximately constant chemical concentrations throughout each experiment (so called "constant composition" cooks). An increase in hydroxide ion concentration andtor hydrogen sulfide ion concentration leads to a decrease in the amount of residual phase lignin, while an increase in ionic strength, i.e. sodium ion concentration, leads to an increase. A signiticant result is that the hydrogen sulfide ion concentration has a pronounced influence on the amount of residual phase lignin during a cook at a low hydroxide ion concentration. The amount of residual phase lignin expressed as % lignin on wood, L,, can be described by the following equation developed for "constant composition" cooks (when cooking with a constant sodium ion concentration of 2 mol/L): LT=0,55-0.32*[HO-](-1,3)*ln[HS-] This equation is valid for a concentration of HO- in the range from 0.17 to 1.4, and a hydrogen sulfide ion concentration from 0.07 to 0.6 mol/L.

scholarly journals Kocuria oceani sp. nov., isolated from a deep-sea hydrothermal plume

2017 ◽  
Vol 67 (1) ◽  
pp. 164-169 ◽  
Author(s):  
Limin Zhang ◽  
Lijun Xi ◽  
Jisheng Ruan ◽  
Ying Huang
Keyword(s):  
Deep Sea ◽  
Hydrothermal Plume

Enzymatic microbial Mn(II) oxidation and Mn biooxide production in the Guaymas Basin deep-sea hydrothermal plume

2009 ◽  
Vol 73 (21) ◽  
pp. 6517-6530 ◽  
Author(s):  
Gregory J. Dick ◽  
Brian G. Clement ◽  
Samuel M. Webb ◽  
F. Joel Fodrie ◽  
John R. Bargar ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Plume ◽  
Guaymas Basin

scholarly journals Autotrophic ammonia oxidation in a deep-sea hydrothermal plume

2004 ◽  
Vol 47 (2) ◽  
pp. 191-206 ◽  
Author(s):  
Phyllis Lam ◽  
James P Cowen ◽  
Ronald D Jones
Keyword(s):  
Deep Sea ◽  
Ammonia Oxidation ◽  
Hydrothermal Plume
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