All > Science > Biotechnology and Genetics > Food Biotechnology
The basic number of chromosomes in a polyploid series, monoploid/haploid = x; diploid = 2x; triploid = 3x; etc.
- Browse Related Terms: allosome, autosome, Barr body, embryo sexing, Hemizygous, semen sexing, sex linkage, x, X-chromosome, Y chromosome
All > Technology > E-mail > Microsoft Email > Microsoft Exchange > Microsoft Exchange 2003
An Exchange component that is integrated with the message transfer agent (MTA) and can be configured to connect routing groups within Exchange, or to route messages to other X.400 systems. When handling communication between Exchange and other X.400 systems, it maps addresses and converts Exchange messages to native X.400 messages and vice versa. [Exchange 2003]
- Browse Related Terms: Address Rewrite, ADMD (administrative management domain), certificate, DSAccess, Exchange Stress and Performance 2003, Internet Key Exchange, IP address/TCP port combination, MTA (message transfer agent), MTA Check, P1 message header, proxy server, reverse proxy server, SMTP (Simple Mail Transfer Protocol), X.400 Connector
All > Technology > E-mail > Microsoft Email > Microsoft Exchange > Microsoft Exchange 5.5
An Exchange component integrated with the MTA that can be configured to connect sites within Exchange, or to route messages to foreign X.400 systems. [Exchange 5.5]
- Browse Related Terms: address space, Backbone, bridgehead server, connector, direct postoffice, directory replication bridgehead server, directory synchronization, Dynamic RAS Connector, Internet Mail Service, MAPI (Messaging Application Programming Interface), Microsoft Mail Connector, MTA (message transfer agent), routing table, Site Connector, target server, X.400 Connector
All > Technology > E-mail > Microsoft Email > Microsoft Exchange > Microsoft Exchange 5.5
Defines the standard interfaces of an electronic messaging system. These recommendations specify the structure of a message handling system, message structure and components, and the method used to transfer messages. [Exchange 5.5]
- Browse Related Terms: DR (delivery receipt), foreign system, gateway, information service, Mailbox, NDR (non-delivery report), NRN (non-read notification), profile, routing, RR (read receipt), SMTP (Simple Mail Transfer Protocol), X.400 Recommendations
All > Technology > E-mail > Microsoft Email > Microsoft Exchange > Microsoft Exchange 5.5
Networking software required to support X.400 server-to-server message transport. [Exchange 5.5]
- Browse Related Terms: control message, inbound host, Internet, Internet News Service, newsfeed, NNTP (Network News Transfer Protocol), organization, outbound host, USENET, USENET site, X.400 transport stack
All > Technology > Operating System > Microsoft Windows > Microsoft Windows Server > Microsoft Active Directory
A set of standards defining a distributed directory service, developed by the International Standards Organization (ISO).- Browse Related Terms: Attribute, Attributes, Classes, Domain Specific Contents, Generic Accounts, Namespace, Object identifier (OID), Schema, X.500
All > Technology > Security
The International Organization for Standardization/International Telecommunication Union Standardization Department (ISO/ITU-T) X.509 standard defined two types of certificates the X.509 public key certificate, and the X.509 attribute certificate. Most commonly (including this document), an X.509 certificate refers to the X.509 public key certificate.
- Browse Related Terms: CA (Certification Authority), certification, Certification Practice Statement (CPS), CRL (Certificate Revocation List), Duration, On-Line Certificate Status Protocol (OCSP), Online Certification Status Protocol (OCSP), public key infrastructure (PKI), Re-key (a certificate), Renew (a certificate), Update (a Certificate), X.509 Certificate, X.509 Public Key Certificate
All > Technology > Security
The public key for a user (or device) and a name for the user (or device), together with some other information, rendered unforgeable by the digital signature of the certification authority that issued the certificate, encoded in the format defined in the ISO/ITU-T X.509 standard.
- Browse Related Terms: CA (Certification Authority), certification, Certification Practice Statement (CPS), CRL (Certificate Revocation List), Duration, On-Line Certificate Status Protocol (OCSP), Online Certification Status Protocol (OCSP), public key infrastructure (PKI), Re-key (a certificate), Renew (a certificate), Update (a Certificate), X.509 Certificate, X.509 Public Key Certificate
All > Technology > Telecommunications
A protocol for network interworking which supports communication between adjacent networks and communication thru transit networks.
- Browse Related Terms: branching network, computer network engineering, Federal Networking Council (FNC), Fiber Distributed Data Interface (FDDI), network integrity, network loss, network reliability, port, request acknowledgment, shaping network, spur, telecommunication architecture, token-bus network, transit network identification, transit network section, X.75 Gateway Service
A frequency band of microwave radiation in which radars operate.
- Browse Related Terms: ASR-9, Derived Products, Meteorologist, Multiple Doppler Analysis, NEXRAD, Product Resolution, TDWR, TVS, WSR-88D, X-Band
All > Technology > Telecommunications
Unassigned overhead bits. Transmitters should code these bits as zeros while receivers are required to be capable of ignoring the value contained in these bits. [T1.646-1995]
- Browse Related Terms: bit stuffing, error correction, maximum user signaling rate, multiplex aggregate bit rate, overhead communications, system overhead information, user overhead information, X-bits
All > Science > Biotechnology and Genetics > Food Biotechnology
See: sex chromosome.
- Browse Related Terms: allosome, autosome, Barr body, embryo sexing, Hemizygous, semen sexing, sex linkage, x, X-chromosome, Y chromosome
All > Science > Biotechnology and Genetics > Human Genome
One of the two sex chromosomes, X and Y. See also: Y chromosome, sex chromosome
- Browse Related Terms: autosome, Chromosomal deletion, Chromosome, cytogenetic map, cytogenetics, Deletion, fluorescence in situ hybridization (FISH), Homologous recombination, Insertion, karyotype, Nucleolar organizing region, Nucleus, sex-linked, Spectral karyotype (SKY), X-chromosome, Y chromosome
All > Technology > Telecommunications
In facsimile systems, the effective recorded spot dimension measured in the direction of the recorded line. Note 1: By "effective recorded spot dimension" is meant the largest center-to-center spacing between recorded spots, which gives minimum peak-to-peak variation of density of the recorded line. Note 2: "X-dimension of recorded spot" implies that the facsimile equipment response to a constant density in the object (original) is a succession of discrete recorded spots.
- Browse Related Terms: flood projection, maximum keying frequency, multiple-spot scanning, picture black, picture white, raster scanning, scanning field, scanning line, scanning line frequency, scanning line length, scanning line period, scanning rate, simple scanning, spot projection, stroke speed, synchronizing, synchronizing signal, total line length, X-dimension of recorded spot, X-dimension of scanning spot, Y-dimension of recorded spot, Y-dimension of scanning spot
All > Technology > Telecommunications
In facsimile systems, the distance between the centers of adjacent scanning spots measured in the direction of the scanning line on the object. Note: The numerical value of the X-dimension of scanning spot depends upon the type of system.
- Browse Related Terms: flood projection, maximum keying frequency, multiple-spot scanning, picture black, picture white, raster scanning, scanning field, scanning line, scanning line frequency, scanning line length, scanning line period, scanning rate, simple scanning, spot projection, stroke speed, synchronizing, synchronizing signal, total line length, X-dimension of recorded spot, X-dimension of scanning spot, Y-dimension of recorded spot, Y-dimension of scanning spot
All > Technology > E-mail > Microsoft Email > Microsoft Exchange > Microsoft Exchange 2007
User-defined, unofficial header field that exists in the message header. X-headers are not specifically mentioned in RFC 2822, but the use of an undefined header field starting with "X-" has become an accepted way to add unofficial header fields to a message. Messaging applications, such as anti-spam, antivirus, and messaging server applications may add their own X-headers to a message. X-header fields are usually preserved but ignored by messaging servers and clients that don't use them. [Exchange 2007]
- Browse Related Terms: DSN (delivery status notification), In-Country/Region Number Format, International Number Format, message envelope, message header, missed call notification, pilot identifier, SCL (spam confidence level), SPF (sender policy framework), TCP (Transmission Control Protocol), UDP (User Datagram Protocol), voice message, voice message originator, X-header
All > Science > Biotechnology and Genetics > Stem Cell
The normal inactivation of one of the two X chromosomes in females.
- Browse Related Terms: aneuploid, autosome, Chromosomes, Diploid, Diploid human cell, genome, haploid, Hox genes, karyotype, Maternal gene product, Metaphase, mitosis, Nucleus, X inactivation, Y chromosome
All > Science > Biotechnology and Genetics > Food Biotechnology
The presence of a gene on the X-chromosome.
- Browse Related Terms: balanced lethal system, chromomeres, chromonema, chromosome banding, chromosome mutation, compound chromosome, endomitosis, endoreduplication, fluorescence in situ hybridization, gene insertion, gene replacement, genome, hybrid dysgenesis, Independent assortment, jumping library, karyogram, lampbrush chromosome, locus, Locus (plural = loci), meiotic drive, paternal, polymorphism, Restriction fragment length polymorphism (RFLP), tetrasomic, walking, X-linked, zoo FISH
All > Science > Biotechnology and Genetics > Food Biotechnology
A genetic disease caused by a mutation on the X chromosome. In X-linked recessive conditions, a normal female "carrier" passes on the mutated X chromosome to an affected son.
A genetic disease caused by an allele at a locus on the X-chromosome.
- Browse Related Terms: amorph, back mutation, cis heterozygote, cryptic, Darwinian cloning, Deletion, down promoter mutation, genetic disease, hemophilia, heteroallele, hypomorph, Irradiation, mutable gene, Mutation, mutation pressure, neutral mutation, neutral theory, Point mutation, Recessive gene, silent mutation, Site-directed mutagenesis, somatic hypermutation, spontaneous mutation, trans heterozygote, X-linked disease
All > Technology > Defense
All > Law > Intellectual Property
In the 46 years prior to the Great Fire of 1836, the United States government had issued about 10,000 patents. Most of these could never be revived again, but Congress acted to restore those records that could be reconstructed from private files and reproduce models which were deemed critical. Patents whose records were not restored were cancelled. There were a total of 2,845 patents restored, most of which were eventually given a number beginning with "X". All patents after the date of the establishment of the Patent Office in July 1836 were numbered as a new series (without the X), beginning with a new Patent No. 1 to John Ruggles. A small number of the new series patents had been destroyed in the Great Fire but they were quickly recovered from their owners' records. X files bear numbers that range from X000001 to X011280. X0000001 is the first patent, issued to Samuel Hopkins in 1790.
- Browse Related Terms: classification, classification of goods and services, combination patent, copyrights, CRU, GAU, Group Art Unit, IC, inventor, Office, Patent, patent infringement, RE, SIRA, Technology Center, US, USC, USPS, X patent
All > Healthcare > Medicine > Cancer
A type of high-energy radiation. In low doses, x-rays are used to diagnose diseases by making pictures of the inside of the body. In high doses, x-rays are used to treat cancer.
- Browse Related Terms: abdominal x-ray, bone marrow aspiration, cell proliferation, chest X-ray, diagnostic mammogram, dosimetry, Gamma-Ray, Mammogram, neuroradiologist, proliferative index, PTC, Radiologist, radiology, radon, respirator, screening mammogram, thoracodynia, x-ray
All > Healthcare > Medicine > Cancer > Breast Cancer
(x'-ra) electromagnetic vibrations of short wavelengths that are produced when electrons moving at high velocity impinge on various substances. These qualities make it possible to use them in taking radiographs of various parts of the body, thus revealing the presence and position of fractures or foreign bodies or etc.
- Browse Related Terms: Cyst, Disease, DNA or deoxyribonucleic acid, Edema, Immune, Inflammatory, Lymph, lymph node, Lymph vessels, Lymphedema, Rheumatoid arthritis, Sentinel Lymph Node, Sentinel Lymph Node Dissection, Stereotactic, x-ray