Rapid determination of carbon dioxide in absorbent liquors or other carbonate solutions

The Analyst ◽  
1949 ◽  
Vol 74 (879) ◽  
pp. 360 ◽  
Author(s):  
B. E. Dixon ◽  
R. A. Williams
Keyword(s):  
Carbon Dioxide ◽  
Rapid Determination ◽  
Carbonate Solutions

Rapid Determination of Carbon Dioxide in Silicate Rocks

1955 ◽  
Vol 27 (11) ◽  
pp. 1796-1797 ◽  
Author(s):  
Leonard Shapiro ◽  
W. W. Brannock
Keyword(s):  
Carbon Dioxide ◽  
Rapid Determination ◽  
Silicate Rocks

Carbon dioxide compensation—its relation to photosynthetic carboxylation reactions, systematics of the Gramineae, and leaf anatomy

1968 ◽  
Vol 46 (3) ◽  
pp. 207-215 ◽  
Author(s):  
W. J. S. Downton ◽  
E. B. Tregunna
Keyword(s):  
Carbon Dioxide ◽  
Leaf Anatomy ◽  
Rapid Determination ◽  
High Concentration ◽  
Mesophyll Cells ◽  
Biochemical Status ◽  
Carbon Dioxide Compensation Concentration ◽  
Carboxylation Pathway ◽  
Compensation Concentration

The carbon dioxide compensation concentration of members of the Gramineae and a few other plants was determined with an infrared CO2 analyzer. These results were then considered in relation to the new photosynthetic carboxylation pathway proposed by Hatch et al., rates of photosynthesis, grass systematics, leaf anatomy, and distribution of starch in the leaf. Plants possessing the new carboxylation pathway had low compensation values whereas those having the Calvin carboxylation reaction had high values. Low compensation plants also had a well-developed parenchyma bundle sheath containing a high concentration of chloroplasts which accumulated large amounts of starch. Little or no starch was present in the mesophyll cells. Cyperus was exceptional in that it also formed appreciable starch in the mesophyll. Those low compensation members of the Gramineae tested belonged either to the chloridoid–eragrostoid or the panicoid lines of evolution. A literature survey indicated that low compensation grasses have photosynthetic rates that are about double those of plants with photorespiration correlated with a temperature optimum for photosynthesis of about 35 °C. Those plants with photorespiration have optima within the range 10–25 °C. Some simple assay procedures proposed on the basis of the above correlations allow rapid determination of the physiological and biochemical status of plants with respect to photosynthesis.

A Rapid Electrochemical Technic for Measuring Carbon Dioxide Content of Blood

1968 ◽  
Vol 14 (7) ◽  
pp. 637-645 ◽  
Author(s):  
Robert J Reyes ◽  
J Ryan Neville
Keyword(s):  
Carbon Dioxide ◽  
Standard Deviation ◽  
Blood Sample ◽  
Whole Blood ◽  
Rapid Determination ◽  
Electrode System ◽  
Carbon Dioxide Content ◽  
Blood Samples ◽  
Carbon Dioxide Co2

Abstract An electrochemical technic for measuring carbon dioxide (CO2) content in whole blood has been devised and evaluated. The method requires a membrane-covered pH electrode for the CO2 measurements. This electrode system permits rapid determination of CO2 content in blood samples of less than 1 ml. The measurement is performed by hemolyzing and acidifying a blood sample in such a manner that the released CO2 goes into physical solution. The increase of tension caused by this physically dissolved CO2 is measured by exposing the sample to a previously calibrated electrode. While use of the technic requires some compromise with accuracy (standard deviation of replicate samples = 0.76 volume/100 ml. compared with 0.12 volume/100 ml. for the Van Slyke manometric procedure), its convenience may outweigh this consideration in certain routine applications.

Weak Beam Imaging and Diffraction Studies of Stacking Faults in Silicon

1976 ◽  
Vol 34 ◽  
pp. 590-591
Author(s):  
T. Y. Tan ◽  
W. K. Tice
Keyword(s):  
Fast Neutron ◽  
Rapid Determination ◽  
Stacking Faults ◽  
Imaging Method ◽  
Large Reduction ◽  
Dislocation Loops ◽  
Fringe Spacing ◽  
Weak Beam ◽  
Kinematical Theory

In studying ion implanted semiconductors and fast neutron irradiated metals, the need for characterizing small dislocation loops having diameters of a few hundred angstrom units usually arises. The weak beam imaging method is a powerful technique for analyzing these loops. Because of the large reduction in stacking fault (SF) fringe spacing at large sg, this method allows for a rapid determination of whether the loop is faulted, and, hence, whether it is a perfect or a Frank partial loop. This method was first used by Bicknell to image small faulted loops in boron implanted silicon. He explained the fringe spacing by kinematical theory, i.e., ≃l/(Sg) in the fault fringe in depth oscillation. The fault image contrast formation mechanism is, however, really more complicated.

Methods for rapid determination of pecan (Carya illinoensis) seed viability

2017 ◽  
Vol 45 (2) ◽  
pp. 455-464
Author(s):  
T.T. Xue ◽  
J. Liu ◽  
Y.B. Shen ◽  
G.Q. Liu
Keyword(s):  
Rapid Determination ◽  
Seed Viability ◽  
Carya Illinoensis
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