| | podobné slovo | definícia |
C20H42
(gcide) | Eikosane \Ei"ko*sane\, n. [Gr. e'i`kosi.] (Chem.)
A solid hydrocarbon, C20H42, of the paraffin series, of
artificial production, and also probably occurring in
petroleum.
[1913 Webster] |
Ca3PO42
(gcide) | Superphosphate \Su`per*phos"phate\, n. (Chem.)
An acid phosphate.
[1913 Webster]
Superphosphate of lime (Com. Chem.), a fertilizer obtained
by trating bone dust, bone black, or phosphorite with
sulphuric acid, whereby the insoluble neutral calcium
phosphate, Ca3(PO4)2, is changed to the primary or acid
calcium phosphate Ca(H2PO4)2, which is soluble and
therefore available for the soil.
[1913 Webster] |
CaH2PO42
(gcide) | Superphosphate \Su`per*phos"phate\, n. (Chem.)
An acid phosphate.
[1913 Webster]
Superphosphate of lime (Com. Chem.), a fertilizer obtained
by trating bone dust, bone black, or phosphorite with
sulphuric acid, whereby the insoluble neutral calcium
phosphate, Ca3(PO4)2, is changed to the primary or acid
calcium phosphate Ca(H2PO4)2, which is soluble and
therefore available for the soil.
[1913 Webster] |
SO43Cr2K2SO424H2O
(gcide) | Chrome \Chrome\, n.
Same as Chromium.
[1913 Webster]
Chrome alum (Chem.), a dark violet substance,
(SO4)3Cr2.K2SO4.24H2O, analogous to, and crystallizing
like, common alum. It is regarded as a double sulphate of
chromium and potassium.
Chrome green
(a) The green oxide of chromium, Cr2O3, used in enamel
painting, and glass staining.
(b) A pigment made by mixing chrome yellow with Prussian
blue.
Chrome red, a beautiful red pigment originally prepared
from the basic chromate of lead, but now made from red
oxide of lead.
Chrome yellow, a brilliant yellow pigment, PbCrO4, used
by painters.
[1913 Webster] |
42nd
(wn) | 42nd
adj 1: the ordinal number of forty-two in counting order [syn:
forty-second, 42nd] |
atomic number 42
(wn) | atomic number 42
n 1: a polyvalent metallic element that resembles chromium and
tungsten in its properties; used to strengthen and harden
steel [syn: molybdenum, Mo, atomic number 42] |
eia-422
(foldoc) | EIA-422
RS-422
(Formerly "RS-422") An EIA
serial line standard which specifies 4-wire,
full-duplex, differential line, multi-drop
communications. The mechanical connections for this interface
are specified by EIA-449. The maximum cable length is
1200m. Maximum data rates are 10Mbps at 1.2m or 100Kbps at
1200m. EIA-422 cannot implement a truly multi-point
communications network (such as with EIA-485), although only
one driver can be connected to up to ten receivers. The best
use of EIA-422 is probably in EIA-232 extension cords.
{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)
|
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)
|
rfc 1442
(foldoc) | RFC 1442
The RFC defining SMI for SNMP v2.
(rfc:1442).
(1997-11-23)
|
rfc 4213
(foldoc) | RFC 4213
The RFC defining mechanisms for
transitioning to IPv6, such as dual-stack versus tunnelling.
(rfc:4213).
(2013-11-12)
|
rs-422
(foldoc) | EIA-422
RS-422
(Formerly "RS-422") An EIA
serial line standard which specifies 4-wire,
full-duplex, differential line, multi-drop
communications. The mechanical connections for this interface
are specified by EIA-449. The maximum cable length is
1200m. Maximum data rates are 10Mbps at 1.2m or 100Kbps at
1200m. EIA-422 cannot implement a truly multi-point
communications network (such as with EIA-485), although only
one driver can be connected to up to ten receivers. The best
use of EIA-422 is probably in EIA-232 extension cords.
{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)
|
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.42
(foldoc) | V.42
An ITU-T standard protocol for
error correction between modems, which includes MNP up
to level 4 and asynchronous to synchronous conversion.
(2004-08-02)
|
v.42bis
(foldoc) | V.42bis
An extension of the ITU-T V.42
standard modem protocol to included compression using a
Lempel-Ziv related technique, which detects frequently
occurring character strings and replaces them with tokens.
This is similar to the Unix compress utility. Typical
compression for text is 50% or better; with nearly 20% gain
from synchronous conversion this gives reduces transmission
time by almost 60%.
[Details? On-line spec?]
(2004-08-02)
|
|