 JMDMT 558 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Descrição do Vídeo:
The James M. DuPont Meteorite Collection -of a-amino
acids. : 47-54. M. Stahmann, Ed. Polyamino Acids,
Polypeptides and Proteins. Univ. of Wisconsin Press.
Madison. 21. Bender, M. L. 1960. Mechanisms of
catalysis of nucleophilic reactions of carboxylic acid
derivatives. Chem. Revs. 60: 53 113. 494 Annals New York
Academy of Sciences 22. NoGUCHi, j. & T. Saito. 1962.
Studies on the catalytic activity of synthetic poly-
amino acids having an imidazole group in the active
site. : 313-327. M. Stahmann, Ed. Polyamino Acids,
Polypeptides and Proteins. Univ. of Wisconsin Press.
Data: November 21, 2008
Palavras Relacionados: Meteorite Life Fossils Cyanobacteria Carbonaceous
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JMDMT 546 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Descrição do Vídeo:
The James M. DuPont Meteorite Collection -
approximately as complex as protein molecules, can be
produced by a process which, although mechanis- tically
complicated, is remarkably simple in operation. The
kind of morphogenicity observed also depends upon the
intrusion of water into the system, under conditions
different from those for inducing loss of catalytic
activity. Acid proteinoid is typically heated in
boiling water or salt solution (1 part of solid to 2000
parts of aqueous phase) for 10 seconds, the hot
supernatant decanted and allowed to cool. There result,
for ea
Data: November 21, 2008
Palavras Relacionados: Meteorite Life Fossils Cyanobacteria Carbonaceous
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JMDMT 544 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Descrição do Vídeo:
The James M. DuPont Meteorite Collection - interest
are those of catalytic activity and morpho- genicity.
Catalytic activity has been found and studied for the
hydrolysis of /»-nitrophenyl acetate. This is an
unnatural substrate popularly used in studies by enzyme
model chemists.-' This substrate is unstable and
hydrolyzes spon- taneously over a large range of pH.
Histidine, which has been implicated as part of the
active site of many enzymes/" catalyzes this
hydrolysis. Simple derivatives of histidine also have
this effect and some which are several times as active
as his
Data: November 21, 2008
Palavras Relacionados: Meteorite Life Fossils Cyanobacteria Carbonaceous
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JMDMT 501 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Descrição do Vídeo:
The James M. DuPont Meteorite Collection - Another
interesting pathway has been described recently by
Schramm et al? Polyarginine (mol. wt. 4000 to 5000) was
prepared from arginine with the help of polyphosphate
esters. Using the same method, polyleucine, polyvaline,
and polyserine were prepared in our laboratory. ' In
addition to the above pathways of polypeptide formation
other obser- vations have been made which indicate that
peptides or polymers containing amino acids can also
be obtained by the action of ultraviolet light- and
electric discharges." It should be adde
Data: November 20, 2008
Palavras Relacionados: Meteorite Life Fossils Cyanobacteria Carbonaceous
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JMDMT 478 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Descrição do Vídeo:
The James M. DuPont Meteorite Collection - added here
that when the formaldehyde-hydroxylamine hydrochloride
mixtures were made slightly basic, pyridines were also
formed in addition to amino acids. A subsequent study
in our laboratory of the products formed by refluxing
aqueous mixtures of formaldehyde and hydrazine revealed
the formation of glycine, vaHne, and lysine as detected
by paper chromatography.'"* The mechanism of lysine
formation is thought to involve the intermediate
formation of hexoses and their reduction-oxidation by
hydrazine. It is well known that hexos
Data: November 20, 2008
Palavras Relacionados: Meteorite Life Fossils Cyanobacteria Carbonaceous
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drolet wood stove
Descrição do Vídeo:
My first few hours with a NON-catalytic
(recirculating) Drolet Escape 1800 wood stove. My lousy
camera almost shows how the gases are burned and how the
flame rolls back into itself. George, if you want to see
"it" (the recirculating gases being burned) really
happens it looks like you better come to my house :p.
Just the same, today it was 19 outside and windy, my
2300+ ranch was over 70 degrees upstairs with a medium
fire.
...where the stove is, downstairs, it was too hot. I love
it!
Data: November 20, 2008
Palavras Relacionados: drolet wood stove
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Dodge Ram Cherry Bomb Extreme Muffler and HiFlow Cat at nite
Descrição do Vídeo:
This is the work that has been done to my Dodge Ram
1500 5.9. v8 mopar
- superchips flashpaq
- K&N Cold Air Intake
- Fastman Throttle Body 52mm
- Rebuilt Starter
- Rewired Battery Terminals
- NGK Iridium IX
- MSD Wires
- MSD Ignition Coil
- HiFlow Catalytic Converter
- Custom Exhaust with Cherry Bomb Extreme Dual Out
- 24" Stainless Steel Tips
- Custom Headlights & Tailights
- Stainless Steel Gauge Bezel
- Sony Headunit
- Infinity Speakers
- Dodge Floor Mats & Seat Covers
- Blue Neons in Cab
- 2 inch lift in front
- spray in liner
- slt edition
Data: November 15, 2008
Palavras Relacionados: Dodge Ram exhaust Cherry Bomb HiFlow Cat High Flow Hi Catalytic Converter
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84 Z28 LS1
Descrição do Vídeo:
Here is my mostly stock 3rd gen with a Borla
cat-back, custom y-pipe, no catalytic converters, LS1
swapped, LS6 cam, ported MAF ends, CAI, tuned for no O2
sensors.
Data: November 12, 2008
Palavras Relacionados: LS1 3rd Gen Camaro Firebird Chevy
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