Re: Bio/Chem ascii art wanted
From Colin Douthwaite <Col...@equinox.gen.nz>
· alt.ascii-art
· 6 Jan 1995 02:24 · View full thread
· report
Cari Smithrud (smi...@lamar.ColoState.EDU) wrote:
: I'm a microbiology major and am interested in any ascii
: art that pertains to biology or chemistry. Does anyone
: have art that might be related to genetics (maybe a well-done
: DNA helix, e.g.), microorganisms, laboratory items, etc. ?
: I'm not looking for anything complex. Plus, I'm looking for
: things on the smaller side -- not horses, cows, birds, and other
: various animals. That's a bit too broad for the biology-
: related subjects I'm interested in.
---------------------------------------------------------------------------
Table of Elements
---------------------------------------------------------------------------
1A 2A 3A 4A 5A 6A 7A 8A
----- -----
1 | H | |He |
|---+---- --------------------+---|
2 |Li |Be | | B | C | N | O | F |Ne |
|---+---| |---+---+---+---+---+---|
3 |Na |Mg |3B 4B 5B 6B 7B | 8B |1B 2B |Al |Si | P | S |Cl |Ar |
|---+---+---------------------------------------+---+---+---+---+---+---|
4 | K |Ca |Sc |Ti | V |Cr |Mn |Fe |Co |Ni |Cu |Zn |Ga |Ge |As |Se |Br |Kr |
|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|
5 |Rb |Sr | Y |Zr |Nb |Mo |Tc |Ru |Rh |Pd |Ag |Cd |In |Sn |Sb |Te | I |Xe |
|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|
6 |Cs |Ba |LAN|Hf |Ta | W |Re |Os |Ir |Pt |Au |Hg |Tl |Pb |Bi |Po |At |Rn |
|---+---+---+------------------------------------------------------------
7 |Fr |Ra |ACT|
-------------
-------------------------------------------------------------
Lanthanide |La |Ce |Pr |Nd |Pm |Sm |Eu |Gd |Tb |Dy |Ho |Er |Tm |Yb |Lu |
|---+---+---+---+---+---+---+---+---+---+---+---+---+---+---|
Actinide |Ac |Th |Pa | U |Np |Pu |Am |Cm |Bk |Cf |Es |Fm |Md |No |Lw |
-------------------------------------------------------------
---------------------------------------------------------------------------
From: ndw...@konichiwa.cc.columbia.edu (Nikolaos Daniel Willmore)
Newsgroups: alt.ascii-art
Subject: Vitamin C.
Date: 17 Jan 1994 07:37:22 GMT
Organization: Columbia University
Lines: 66
Does this count? From another discusion,
In article <CJr...@ncifcrf.gov>, Jerry N. Alexandratos
<ale...@ncifcrf.gov> wrote:
>...(For the chemists, ascorbic acid doesn't have a free COOH group, only
>alcohols. It is acidic like phenol, C6H5OH.)
The real fun thing is that is IS like a free COOH group, more than it is
like a phenol. It is what synthetic chemists like to call a "vinylogous"
carboxylic acid, in that is has the RC(O)OH group but there is a C=C
(vinyl) group between the C and the OH, like this, RC(O)CH=CHOH. Putting
the C=C in there doesn't change things much! When you pull off the proton
(H+) the resulting RC(O)CH=CHO- is much like a normal carboxylate ion,
RC(O)O- except it is more delocalized due to the C=C so it is more stable.
Thus a vinylogous carboxylic acid is more acidic than a carboxylic acid
such as acetic acid (vinegar). However ascorbic acid has a second electron
donating OH connected to the C=C group that balances out the effect of the
C=C itself.
Phenol is not much of an acid, though it is easy to pull off it's proton
with bases. Ascorbic acid is slightly more acidic than acetic acid. Amino
acids aren't really acidic either since the proton from the COOH group is
normally attatched to the amino group, which is a base.
Ascorbic acid:
OH
|
HCOH <-Chiral center one
|
Chiral center two-> HC-O-C=O <-C=O similar to C=O of a carboxylic acid
| |
C===C-OH <-Electron donating OH
|
OH <- Acidic OH
My above comment about how it was a vinylogous carboxylic acid is
not exactly right since the C=O is connected to an O in the ring,
not a carbon like is the case for carboxylic acids. When you add
such an O to a
carboxylic acid R-C=O you get a "carbonic acid" group, R-O-C=O, but the
| |
OH OH
acidity doesn't change much (also, normal non-vinylogous carbonic
acids are quite unstable, as on deprotonation they tend to
spontaneously loose carbon dioxide, giving RO- which then is quite
basic and grabs the lost proton right back!).
Why is ascorbic acid an anti-oxidant? Because it itself is very easily
oxidized:
OH OH OH
| | |
HCOH HCOH HCOH
| | |
HC-O-C=O - 2H HC-O-C=O water HC-O-C=O
| | ---------> | | ------> | | Hydrated form of
C===C-OH O=C---C=O <----- O=C---C-OH dehydroascorbic acid.
| |
OH OH
Those two H atoms attatch to nasty things like free radicals, though
the actual details are very complicated, and involve HUGE enzymes
taking hold of the ascorbic acid and whatever it is reacting with.
Weee! This is fun.
-Nik
--------------------------------------------------------------------
--------------------------------------------------------------------
deoxyribose
HOCH2 O OH
|.' `.|
' H H `
|\|_|/|
H | | H
OH H
thymine
CH3
|
H ,,'. O
\// `.//
| |
| |
N. .N---H
`.'
||
O
adenine
H
/
H---N N H
\ / \\ /
\_____/ \\/
// \\ |
N ----N
\ /
/=====N
/
H
guanine
H
|
/ \\
/ N
N | O
\ ,,'. //
\// `//
| |
| |
N. .N--H
\\.'
|
N--H
/
H
cytosine
H
H---N |
\ .'.. H
\.' \\/
|| |
|| |
N. .N
`.'
||
||
O
base pairs
thiamine adenine
CH3
|
H ,,'. O- - - H---N N H
\// `.// \ / \\ /
| | \_____/ \\/
| | // \\ |
N. .N--------H- - -N ----N
H2C O / `.' \ /
|.' `./ || /=====N
' H H ` O / \
|\|_|/| H \ H
H |H N |__ H
H \/| |\|
, H H ,
|`. .'|
H O CH2
guanine cytosine
H
|
/ \\
/ N H
N | O- - -H---N |
\ ,,'. // \ .'.. H
\// `// \.' \\/
| | || |
| | || |
N. .N-------H- - - N. .N H
H2C O / \\.' `.' \ |__ H
|.' `./ | || \/| |\|
' H H ` N----------H- - - - -O , H H ,
|\|_|/| / |`. .'|
H |H H H O CH2
H
helix
.-.-. .-.-. .-.-. .-.-. .-.-. .-.-. .-.-. .-.-. .-.-.
/ \ \ / / \ \ / / \ \ / / \ \ / / \ \ / / \ \ / / \ \ / / \ \ / /
/ `-`-' `-`-' `-`-' `-`-' `-`-' `-`-' `-`-' `-`-'
-Lee Thompson-Herbert-
--------------------------------------------------------------------
Original message headers
X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f996b,fff17983c01dcbeb X-Google-Attributes: gidf996b,public X-Google-ArrivalTime: 1995-01-05 18:24:44 PST Path: nntp.gmd.de!newsserver.jvnc.net!netnews.upenn.edu!news.cc.swarthmore.edu!psuvax1!news.ecn.bgu.edu!newspump.wustl.edu!newsreader.wustl.edu!news.starnet.net!wupost!waikato!comp.vuw.ac.nz!canterbury.ac.nz!southern.co.nz!equinox.gen.nz!equinox!not-for-mail From: Col...@equinox.gen.nz (Colin Douthwaite) Newsgroups: alt.ascii-art Subject: Re: Bio/Chem ascii art wanted Date: 6 Jan 1995 02:24:44 GMT Organization: Southern InterNet Services Lines: 251 Distribution: world Message-ID: <3ei9lc$g8...@southern.co.nz> References: <950...@SYSLINK.MCS.COM> <3efeqk$1g7...@yuma.ACNS.ColoState.EDU> NNTP-Posting-Host: equinox.gen.nz X-Newsreader: TIN [AMIGA 1.3 941121BETA PL0]
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