NEW METHOD FOR THE SIMULTANEOUS OBSERVATION OF SHAPE AND SIZE OF A LARGE NUMBER OF FALLING SNOW PARTICLES

1956 ◽  
Vol 13 (3) ◽  
pp. 274-278 ◽  
Author(s):  
Keiji Higuchi
Keyword(s):  
New Method ◽  
Simultaneous Observation ◽  
Shape And Size

scholarly journals A new method for the quantitative estimation of hydrocyanic acid in vegetable and animal tissues

1910 ◽  
Vol 82 (559) ◽  
pp. 574-587 ◽  
Keyword(s):  
Rapid Detection ◽  
Quantitative Estimation ◽  
New Method ◽  
Hydrocyanic Acid ◽  
Animal Tissues ◽  
Simultaneous Observation ◽  
Sodium Picrate ◽  
Prunus Laurocerasus

The evolution of hydrocyanic acid by laurel leaves (Prunus laurocerasus) is consequence of congelation, or of their exposure to the action of anæsthetic vapours, was first pointed out by Raphael Dubois. It has been studied more recently by Guignard, who has introduced an extremely delicate test for the presence of hydrocyanic acid by sodium picrate paper, and quite recently this test has been applied by F. E. Armstrong for the rapid detection of ferments of the emulsin class. The reaction was first studied by Hlasiwetz in 1859, who gave the following equation:- C 6 H 3 N 3 O 7 + 3 KCN + 3H 2 O = C 8 H 4 KN 5 O 6 + CO 2 + NH 3 + 2KHO. Potassium isopurpurate. The reaction appeared likely to afford a convenient instance for the simultaneous observation of chemical and electrical changes taking place in living protoplasm between the course of the two changes-chemical and electrical.

The Alteration of the Pore Spaces in Sandstones

1973 ◽  
Vol 31 ◽  
pp. 210-211
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Other ◽  
Coarse Grained ◽  
Depositional Fabric ◽  
Soluble Components ◽  
Scanning Electron ◽  
Shape And Size

The pore spaces in sandstones are the result of the original depositional fabric and the degree of post-depositional alteration that the rock has experienced. The largest pore volumes are present in coarse-grained, well-sorted materials with high sphericity. The chief mechanisms which alter the shape and size of the pores are precipitation of cementing agents and the dissolution of soluble components. Each process may operate alone or in combination with the other, or there may be several generations of cementation and solution.The scanning electron microscope has ‘been used in this study to reveal the morphology of the pore spaces in a variety of moderate porosity, orthoquartzites.

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

A new method for the determination of nitrates

1960 ◽  
Vol 23 ◽  
pp. 227-232 ◽  
Author(s):  
P WEST ◽  
G LYLES
Keyword(s):  
New Method
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