| slovo | definícia |
23
(gcide) | 23 \23\ adj.
1. one more than twenty-two; denoting a quantity consisting
of twenty-three items or units; -- representing the number
twenty-three as Arabic numerals
Syn: twenty-three, xxiii
[WordNet 1.5 +PJC] |
23
(wn) | 23
adj 1: being three more than twenty [syn: twenty-three, 23,
xxiii]
n 1: the cardinal number that is the sum of twenty-two and one
[syn: twenty-three, 23, XXIII] |
| | podobné slovo | definícia |
plutonium 239
(encz) | plutonium 239, n: |
uranium 235
(encz) | uranium 235, n: |
uranium 238
(encz) | uranium 238, n: |
238
(czen) | 238,6 litrů,hogshead Zdeněk Brož |
vilfredo pareto (1848-1923)
(czen) | Vilfredo Pareto (1848-1923),Pareton: [jmén.] italský sociolog a
ekonom Petr Prášek |
23rd
(gcide) | 23rd \23rd\ adj.
1. coming next after the twenty-second in a series
Syn: twenty-third
[WordNet 1.5 +PJC] |
C22H23NO7
(gcide) | opianine \o"pi*a*nine\, n. (Chem.)
An alkaloid (C22H23NO7) found in small quantity in opium.
It is identical with narcotine. It is present in amounts up
to 11% in Papaver somniferum, and is used clinically as an
antitussive. --MI11
Syn: noscapine; narcosine; opian.
[1913 Webster +PJC] |
C23H22O6
(gcide) | rotenone \ro"te*none\, n.
A chemical substance (C23H22O6) extracted from the root of
the derris (Derris elliptica, Derris malaccensis, and
other species), used in treatment of scabies and as an
insecticide for external infestation by chiggers in human
medicine, and in veterinary medicine for the treatment of
infestations with fleas, ticks, and lice.
[PJC] |
C23H30ClN3O
(gcide) | Atabrine \Atabrine\ n. [Trademark.]
a drug once used to treat malaria (C23H30ClN3O); chemically
it is a derivative of the tricyclic structure acridine:
6-chloro-9-[[4-(diethylamino-1-methylbutyl)]amino]-2-methoxyacridine.
It also has some anthelmintic activity against cestodes.
Atabrine is a trademark.
Syn: quinacrine, mepacrine.
[WordNet 1.5] |
C23H48
(gcide) | Trikosane \Tri"ko*sane\, n. [Pref. tri- + Gr. ? twenty.] (Chem.)
A hydrocarbon, C23H48, of the methane series, resembling
paraffin; -- so called because it has twenty-three atoms of
carbon in the molecule.
[1913 Webster] |
C6H2NO23OH
(gcide) | Picric \Pi"cric\, a. [Gr. ? bitter.] (Chem.)
Pertaining to, or designating, a strong organic acid (called
picric acid), intensely bitter.
[1913 Webster]
Note: Picric acid is obtained by treating phenol with strong
nitric acid, as a brilliant yellow crystalline
substance, C6H2(NO2)3.OH. It is used in dyeing silk
and wool, and also in the manufacture of explosives, as
it is very unstable when heated. Called also
trinitrophenol, and formerly carbazotic acid.
[1913 Webster] |
C6H3CO23
(gcide) | Trimesitic \Tri`me*sit"ic\, a. [Pref. tri- + mesitylene + -ic.]
(Chem.)
Of, pertaining to, or designating, a tribasic acid,
C6H3.(CO2)3, of the aromatic series, obtained, by the
oxidation of mesitylene, as a white crystalline substance.
[Written also trimesic.]
[1913 Webster] |
CHNO23
(gcide) | Nitroform \Ni"tro*form\, n. [Nitro- + formyl.] (Chem.)
A nitro derivative of methane, analogous to chloroform,
obtained as a colorless oily or crystalline substance,
CH.(NO2)3, quite explosive, and having well-defined acid
properties.
[1913 Webster] |
H2NC6H4COOCH23NC4H92
(gcide) | butacaine \butacaine\ n.
a white crystalline ester (C18H30N2O2) that is applied to
mucous membranes as a topical anesthetic. Chemically it is
3-(di-n-butylamino)-1-propanol 4-aminobenzoate
(H2N.C6H4.CO.O.(CH2)3N(C4H9)2). It is usually used as the
sulfate salt.
Syn: butacaine sulfate.
[WordNet 1.5 +PJC] |
NO23C6HOH2
(gcide) | Styphnic \Styph"nic\, a. [Gr. (spurious) sty`fein to contract.]
(Chem.)
Pertaining to, or designating, a yellow crystalline
astringent acid, (NO2)3.C6H.(OH)2, obtained by the action
of nitric acid on resorcin. Styphnic acid resembles picric
acid, but is not bitter. It acts like a strong dibasic acid,
having a series of well defined salts.
[1913 Webster] |
23rd
(wn) | 23rd
adj 1: coming next after the twenty-second in position [syn:
twenty-third, 23rd] |
atomic number 23
(wn) | atomic number 23
n 1: a soft silvery white toxic metallic element used in steel
alloys; it occurs in several complex minerals including
carnotite and vanadinite [syn: vanadium, V, {atomic
number 23}] |
june 23
(wn) | June 23
n 1: the night before Midsummer Day [syn: Midsummer Eve,
Midsummer Night, St John's Eve, St John's Night,
June 23] |
plutonium 239
(wn) | plutonium 239
n 1: a highly fissionable isotope of plutonium that is used in
atomic weapons and as a reactor fuel; produced by
irradiating uranium 238 with slow electrons |
uranium 235
(wn) | uranium 235
n 1: a uranium isotope with mass number 235; capable of
sustaining chain reactions |
uranium 238
(wn) | uranium 238
n 1: the commonest isotope of uranium; it is not fissionable but
when irradiated with neutrons it produces fissionable
plutonium 239 |
eia-232
(foldoc) | EIA-232
RS-232
(Formerly "RS-232") The most common
asynchronous serial line standard. EIA-232 is the EIA
equivalent of ITU-T V.24, and V.28.
EIA-232 specifies the gender and pin use of connectors, but
not their physical type. RS-423 specifies the electrical
signals. 25-way D-type connectors are common but often only
three wires are connected - one ground (pin 7) and one for
data in each direction. The other pins are primarily related
to hardware handshaking between sender and receiver and to
carrier detection on modems, inoperative circuits, busy
conditions etc.
The standard classifies equipment as either {Data
Communications Equipment} (DCE) or Data Terminal Equipment
(DTE). DTE receives data on pin 3 and transmits on pin 2
(TD). A DCE EIA-232 interface has a female connector. DCE
receives data from DTE on pin 2 (TD) and sends that data out
the analog line. Data received from the analog line is sent
by the DCE on pin 3(RD).
Originally DCE was a modem and DTE was a computer or terminal.
The terminal or computer was connected (via EIA-232) to two
modems, which were connected via a telephone line.
The above arrangement allows a computer or terminal to be
connected to a modem with a straight-through (2-2, 3-3) cable.
It is common, however, to find equipment with the wrong sex
connector or with pins two and three reversed, requiring the
insertion of a cable or adapter wired as a gender mender or
null modem. Such an adapter is also required when
connecting a computer directly to a terminal or to another
computer without the use of modems.
(1999-12-28)
|
eia-232c
(foldoc) | EIA-232C
The EIA equivalent of ITU-T
standard V.24.
The EIA EIA-232C electrical signal is unbalanced +/- 5 to +/-
12V, polar non return to zero and handles data speeds up
to 19.2 kilobits per second.
[Correct name? Relationship to RS-232C? Difference from
EIA-232?]
(2004-08-02)
|
eia-423
(foldoc) | EIA-423
RS-423
(Formerly "RS-423") An EIA
serial line standard which specifies single ended
communication. The mechanical connections for this interface
are specified by EIA-449. Although it was originally
intented as a successor of EIA-232 it is not widely used.
The EIA-232 standard has its limits at 20kbps and 1.5m.
EIA-423 can have a cable lenght of 1200m, and achieve a data
rate of 100Kbps. When no data is being transmitted, the
serial line is at a logical zero (+3 to +15 Volts). A logical
one is represented as a signal level of -15 to -3 Volts. In
practise, one often finds signals which switch between
nominally +4.5 and +0.5 Volts. Such signals are large by
modern standards, and because the impedance of the circuits is
relatively high, the allowable bit rate is modest. The data
is preceded by a start bit which is always a logical
one. There may be seven or eight bits of data, possibly
followed by an even or odd parity bit and one or two stop
bits. A "break" condition is a continuous logical one on the
line which is what would be observed if nothing was connected.
{Comparing EIA-422, 423, 449 to RS-232-C
(http://rad.com/networks/1995/rs232/rs449.htm)}. {Details
on RS-232, 422, 423 and 485
(http://rs485.com/rs485spec.html)}.
(2002-10-05)
|
h.323
(foldoc) | H.323
The ITU-T standard for sending
voice (audio) and video using IP on a LAN without
QoS.
H.323 includes Q.931 for call setup, H.225 for call
signalling, H.245 for exchanging terminal capabilities,
RTP/RTCP for packet streaming, G.711/G.712 for
CODECs, and several other protcols, many of which need to
be negotiated to setup a simple voice call.
The complexity of H.323 has lead to the IETF proposing the
simpler alternatives SIP and MGCP/Megaco.
(2003-11-30)
|
iso 8823
(foldoc) | presentation layer
ISO 8822
ISO 8823
layer 6
X.216
X.226
The second highest layer (layer 6) in the OSI
seven layer model. Performs functions such as text
compression, code or format conversion to try to smooth out
differences between hosts. Allows incompatible processes in
the application layer to communicate via the {session
layer}.
Documents: ITU Rec. X.226 (ISO 8823), ITU Rec. X.216 (ISO
8822).
(1996-07-20)
|
rfc 1123
(foldoc) | RFC 1123
The RFC "Requirements for Internet
Hosts Application and Support" which clarifies or changes the
specification of protocols given in earlier RFCs.
RFC 1123 defines the terms "MUST", "SHOULD", "MAY",
"unconditionally compliant", "conditionally compliant".
Capitals are used to emphasise that the official definition of
the word is being used.
MUST or REQUIRED means an absolute requirement for
conformance.
SHOULD or RECOMMENDED means the item can be ignored under
certain circumstances, although the full implications should
be understood.
MAY or OPTIONAL means the implementor can choose, usually
depending on whether it is needed or not.
Something "unconditionally compliant" meets all the MUST and
SHOULD requirements, "conditionally compliant" meets all the
MUST requirements and "not compliant" - does not meet some
MUST requirement.
For example, RFC 1123 amends RFC952 to say software MUST
handle either a letter or a digit as the first character of a
hostname.
(rfc:1123).
(1996-01-13)
|
rfc 1823
(foldoc) | RFC 1823
The RFC defining the C language
application program interface to the {Lightweight Directory
Access Protocol}.
(rfc:1823).
(1996-11-28)
|
rfc 2234
(foldoc) | RFC 2234
The RFC defining Augmented Backus-Naur Form.
(rfc:2234).
(1997-11-23)
|
rfc 2236
(foldoc) | RFC 2236
The RFC describing IGMP version 2.
(rfc:2236).
(1999-11-08)
|
rfc 2326
(foldoc) | RFC 2326
The RFC defining RTSP.
(rfc:2326).
(1999-10-12)
|
rfc 2364
(foldoc) | RFC 2364
The RFC defining PPPoA.
(rfc:2364).
(2007-06-15)
|
rfc 3232
(foldoc) | RFC 3232
The RFC describing TCP port
numbers. RFC 3232 supersedes RFC 1700.
(rfc:3232).
See also IANA, STD 2.
(2004-12-30)
|
rs-232
(foldoc) | EIA-232
RS-232
(Formerly "RS-232") The most common
asynchronous serial line standard. EIA-232 is the EIA
equivalent of ITU-T V.24, and V.28.
EIA-232 specifies the gender and pin use of connectors, but
not their physical type. RS-423 specifies the electrical
signals. 25-way D-type connectors are common but often only
three wires are connected - one ground (pin 7) and one for
data in each direction. The other pins are primarily related
to hardware handshaking between sender and receiver and to
carrier detection on modems, inoperative circuits, busy
conditions etc.
The standard classifies equipment as either {Data
Communications Equipment} (DCE) or Data Terminal Equipment
(DTE). DTE receives data on pin 3 and transmits on pin 2
(TD). A DCE EIA-232 interface has a female connector. DCE
receives data from DTE on pin 2 (TD) and sends that data out
the analog line. Data received from the analog line is sent
by the DCE on pin 3(RD).
Originally DCE was a modem and DTE was a computer or terminal.
The terminal or computer was connected (via EIA-232) to two
modems, which were connected via a telephone line.
The above arrangement allows a computer or terminal to be
connected to a modem with a straight-through (2-2, 3-3) cable.
It is common, however, to find equipment with the wrong sex
connector or with pins two and three reversed, requiring the
insertion of a cable or adapter wired as a gender mender or
null modem. Such an adapter is also required when
connecting a computer directly to a terminal or to another
computer without the use of modems.
(1999-12-28)
|
rs-232c
(foldoc) | RS-232C
Renamed EIA-232C
(2004-08-02)
|
rs-232d
(foldoc) | RS-232D
The EIA equivalent of ITU-T
standard V.28.
[Difference from EIA-232/EIA-232C?]
(1995-03-02)
|
rs-423
(foldoc) | EIA-423
RS-423
(Formerly "RS-423") An EIA
serial line standard which specifies single ended
communication. The mechanical connections for this interface
are specified by EIA-449. Although it was originally
intented as a successor of EIA-232 it is not widely used.
The EIA-232 standard has its limits at 20kbps and 1.5m.
EIA-423 can have a cable lenght of 1200m, and achieve a data
rate of 100Kbps. When no data is being transmitted, the
serial line is at a logical zero (+3 to +15 Volts). A logical
one is represented as a signal level of -15 to -3 Volts. In
practise, one often finds signals which switch between
nominally +4.5 and +0.5 Volts. Such signals are large by
modern standards, and because the impedance of the circuits is
relatively high, the allowable bit rate is modest. The data
is preceded by a start bit which is always a logical
one. There may be seven or eight bits of data, possibly
followed by an even or odd parity bit and one or two stop
bits. A "break" condition is a continuous logical one on the
line which is what would be observed if nothing was connected.
{Comparing EIA-422, 423, 449 to RS-232-C
(http://rad.com/networks/1995/rs232/rs449.htm)}. {Details
on RS-232, 422, 423 and 485
(http://rs485.com/rs485spec.html)}.
(2002-10-05)
|
v.23
(foldoc) | V.23
An ITU-T modem protocol which
allowed half-duplex (unidirectional) data transmission at
1200 bits per second with a 75 bps back channel and {fall
back} to 600/75 bps. This was the main standard used for
British Telecom's Prestel service.
(2004-07-26)
|
|