The size spectrum of condensation nuclei by a new form of the ionic mobility method

1965 ◽  
Vol 14 (3) ◽  
pp. 318-342 ◽  
Author(s):  
G. McGreevy
Keyword(s):  
Ionic Mobility ◽  
Size Spectrum ◽  
Condensation Nuclei ◽  
New Form ◽  
Mobility Method

Theoretical Aspccts of Cloud Drop Distributions

1949 ◽  
Vol 2 (3) ◽  
pp. 376 ◽  
Author(s):  
EB Kraus ◽  
B Smith
Keyword(s):  
Cooling Rate ◽  
Drop Size ◽  
Initial Temperature ◽  
Theoretical Study ◽  
Air Pressure ◽  
Size Spectrum ◽  
Condensation Nuclei ◽  
Cloud Drop ◽  
Rate Of Cooling

A theoretical study indicates that the number and size of the drops formed in a cloud vary with the rate of cooling, the initial temperature, and the air pressure. The faster the cooling rate, the lower the initial temperature, and the lower the altitude, the greater is the number of drops and the smaller their size. The drop size spectrum also depends, to a large extent, on the number of available condensation nuclei. Furthermore, it tends to be widened by sedimentation and turbulence.

The Application of Condensation Nuclei Monitors to Clean Rooms

1985 ◽  
Vol 28 (2) ◽  
pp. 34-36
Author(s):  
David Ensor ◽  
Robert Donovan
Keyword(s):  
Ultrafine Particles ◽  
Turn Of The Century ◽  
Size Spectrum ◽  
Adiabatic Expansion ◽  
Clean Room ◽  
Condensation Nuclei ◽  
Differential Mobility ◽  
Expansion Chamber ◽  
Diffusion Battery ◽  
Number Of Particles

The instrument often used by aerosol researchers to detect 0.1-μm and smaller particles is the condensation nuclei monitor. The instrument will provide information about ultrafine particles in the clean room unobtainable by any other means. The principle of operation is to grow the particles by the condensation of water or alcohol onto a size that can be detected optically. The instrument was invented at the turn of the century by John Aitken.1 His instrument was an adiabatic expansion chamber followed by counting with a microscope after the droplets had settled onto a slide. In the last few years, automatic instruments have been commercially available. Since the condensation nuclei counter only detects the total number of particles, a particle size preseparator needs to be used with the instrument to obtain size distribution information. One type of preseparator is the "diffusion battery," and another is a differential mobility separator. The present application of the instrument is as a research tool to quantify the size spectrum of particles less than 1 μm. Measurements of clean-room condensation nuclei will be presented under a number of situations.

Fine Structure of Platelet Interaction with a New Microcrystalline Collagen Preparation

1974 ◽  
Vol 32 ◽  
pp. 58-59
Author(s):  
W. H. Zucker ◽  
R. G. Mason
Keyword(s):  
Fine Structure ◽  
Platelet Aggregation ◽  
Hydrochloric Acid ◽  
Whole Blood ◽  
Platelet Adhesion ◽  
Hemostatic Agent ◽  
Native Collagen ◽  
Fibrillar Morphology ◽  
Clinical Interest ◽  
New Form

Platelet adhesion initiates platelet aggregation and is an important component of the hemostatic process. Since the development of a new form of collagen as a topical hemostatic agent is of both basic and clinical interest, an ultrastructural and hematologic study of the interaction of platelets with the microcrystalline collagen preparation was undertaken.In this study, whole blood anticoagulated with EDTA was used in order to inhibit aggregation and permit study of platelet adhesion to collagen as an isolated event. The microcrystalline collagen was prepared from bovine dermal corium; milling was with sharp blades. The preparation consists of partial hydrochloric acid amine collagen salts and retains much of the fibrillar morphology of native collagen.

The staining pattern of the tropomyosin sequence is displayed in a new paracrystal

1986 ◽  
Vol 44 ◽  
pp. 150-151
Author(s):  
M.K. Lamvik ◽  
L.L. Klatt
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Staining Pattern ◽  
Banding Patterns ◽  
Mass Thickness ◽  
New Form

Tropomyosin paracrystals have been used extensively as test specimens and magnification standards due to their clear periodic banding patterns. The paracrystal type discovered by Ohtsuki1 has been of particular interest as a test of unstained specimens because of alternating bands that differ by 50% in mass thickness. While producing specimens of this type, we came across a new paracrystal form. Since this new form displays aligned tropomyosin molecules without the overlaps that are characteristic of the Ohtsuki-type paracrystal, it presents a staining pattern that corresponds to the amino acid sequence of the molecule.

A New Form and Function for Personality

2013 ◽  
Author(s):  
Joshua Wilt ◽  
William Revelle
Keyword(s):  
Form And Function ◽  
New Form ◽  
And Function

New form of oxygen found

Nature ◽  
2001 ◽  
Author(s):  
Philip Ball
Keyword(s):  
New Form
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