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Alpha particles

Alpha particles

positively charged particles composed of two protons and two neutrons, i.e., helium nuclei, emitted during disintegration of very heavy isotopes; a beam of alpha particles or an alpha ray has very strong ionizing power, but weak penetrability.


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argument against the uranium-in-zircon dating

... associated with radiation damage, or to the ejection of high energy alpha particles from the phase being dated (Hurley, 1954). Zeitler et al. ( 1987) recently revived ...

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by mith
Mon Sep 22, 2008 11:56 pm
 
Forum: Evolution
Topic: argument against the uranium-in-zircon dating
Replies: 17
Views: 12496

The Fiber Disease

... Affinity identification of delta-opioid receptors using latex nanoparticles. M Hasegawa, H Ohno, H Tanaka, M Hatakeyama, H Kawaguchi, T Takahashi, ... [Pubmed Record - new window] Synthesis and characterization of poly-alpha,beta-[N-(2-hydroxyethyl)-L-aspartamide]-g-poly(L-lactide) biodegradable ...

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by Nadas Moksha
Wed Dec 20, 2006 8:01 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5479111

Cancer Research paper (1997) needed

... me a pdf of the following paper: Narayanan PK, Goodwin EH, Lehnert BE. Alpha particles initiate biological production of superoxide anions and hydrogen peroxide in human ...

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by amaterasu
Wed May 31, 2006 1:01 pm
 
Forum: PDF & Doc Files
Topic: Cancer Research paper (1997) needed
Replies: 0
Views: 2247

The Fiber Disease

... have inhaled and ingested millions of tiny invisible ceramic uranium particles which emit alpha, beta and gamma radiation as they embed in lungs, kidneys, blood, lymph and bone.22 Radiation ...

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by Skytroll
Tue May 23, 2006 4:57 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5479111

Exocytosis vs Pinocytosis

... neurons. - Pynocytosis is the process by means of cells ingest liquid particles or dissolved particles from extracellular (intersticial) space ... in cells with nutritive function (as cells of the intestinal mucose). Alpha cells produce and secrete glucagon, so the process is exocytosis. At ...

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by Enzyme
Sun Apr 16, 2006 3:25 pm
 
Forum: Cell Biology
Topic: Exocytosis vs Pinocytosis
Replies: 1
Views: 5111
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