scholarly journals Abiotic synthesis of high-molecular-weight organics from an inorganic gas mixture of carbon monoxide, ammonia, and water by 3 MeV proton irradiation

2004 ◽  
Vol 84 (8) ◽  
pp. 1410-1412 ◽  
Author(s):  
Yoshinori Takano ◽  
Akihiro Ohashi ◽  
Takeo Kaneko ◽  
Kensei Kobayashi
Keyword(s):  
Molecular Weight ◽  
Carbon Monoxide ◽  
High Molecular Weight ◽  
Proton Irradiation ◽  
Gas Mixture ◽  
Abiotic Synthesis

Abiotic Synthesis of Amino Acids by Proton Irradiation of a Mixture of Carbon Monoxide, Nitrogen, and Water

1989 ◽  
Vol 18 (9) ◽  
pp. 1527-1530 ◽  
Author(s):  
Kensei Kobayashi ◽  
Tairo Oshima ◽  
Hiroshi Yanagawa
Keyword(s):  
Amino Acids ◽  
Carbon Monoxide ◽  
Proton Irradiation ◽  
Abiotic Synthesis

Proton irradiation of ultra high molecular weight polyethylene for space applications

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
C.P. Stephens ◽  
R.S. Benson ◽  
X. Ling ◽  
H. Song ◽  
H.-J. Ham ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Low Dose ◽  
Proton Irradiation ◽  
Morphological Changes ◽  
Amorphous Region ◽  
Interfacial Region ◽  
Space Applications ◽  
Ultra High Molecular Weight ◽  
Proton Dose

AbstractThe effect of low dose proton irradiation on the morphology of ultra high molecular weight polyethylene (UHMWPE) was studied. The integral proton dose was ranging from 900 Gy to 1200 Gy. The experimental data revealed that low dose proton irradiation in the presence of oxygen leads to the formation of intermolecular crosslinks in UHMWPE and that proton irradiation produces morphological changes that involve a reduction in the thickness of the interfacial region and increase in the thickness of the amorphous region. The observed morphological changes depend on the integral dose

Microtubule motors and other maps

1990 ◽  
Vol 48 (3) ◽  
pp. 1-1
Author(s):  
Richard B. Vallee
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Cytoplasmic Dynein ◽  
Organelle Transport ◽  
Structural Components ◽  
Microtubule Associated Proteins ◽  
Microtubule Motors ◽  
Associated Proteins ◽  
The Subject ◽  
Intracellular Motility

Microtubules are involved in a number of forms of intracellular motility, including mitosis and bidirectional organelle transport. Purified microtubules from brain and other sources contain tubulin and a diversity of microtubule associated proteins (MAPs). Some of the high molecular weight MAPs - MAP 1A, 1B, 2A, and 2B - are long, fibrous molecules that serve as structural components of the cytamatrix. Three MAPs have recently been identified that show microtubule activated ATPase activity and produce force in association with microtubules. These proteins - kinesin, cytoplasmic dynein, and dynamin - are referred to as cytoplasmic motors. The latter two will be the subject of this talk.Cytoplasmic dynein was first identified as one of the high molecular weight brain MAPs, MAP 1C. It was determined to be structurally equivalent to ciliary and flagellar dynein, and to produce force toward the minus ends of microtubules, opposite to kinesin.

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