All > Science > Biotechnology and Genetics > Food Biotechnology
Abbreviation for thymine.
- Browse Related Terms: A, ACP, AI, ASA, BOD, Bt, C, CBD, ccc DNA, cM, cpDNA, EDV, F1, g, GDP, GLP, GRAS, GUS, Hup+, log phase, LPS, MAS, messenger RNA, monocot, mtDNA, NFT, OLA, OPU, ORF, PEG, PG, Phage, PHB, PPM, PR protein, PWP, RH, RIA, RIP, RNAase, RNase, RuBP, SC, SCA, SCE, SCP, simple sequence repeat, SNP, sperm, ssDNA, T, U, VSG
Thunderstorm
- Browse Related Terms: Hodograph, Left Mover, Max Parcel Level (MPL), OCNL, Outer Convective Band, Outflow, Right Mover, Shelf Cloud, Single Cell Thunderstorm, Supercell Thunderstorm, T, Tail-End Charlie, TSRA, TSTM
All > Technology > Knowledge Management > Semantic Web
Box - used to describe statements in ontologies; T-Box statements describe a system in terms of controlled vocabularies, for example, a set of classes and properties. T-box statements are sometimes associated with object-oriented classes.
- Browse Related Terms: ABox, anonymous class, asserted hierarchy, CamelBack notation, defined class, inferred hierarchy, OWL DL, OWL-Full, OWL-Lite, owl:Thing, Pellet, probe class, Reasoner, restriction, SHER, T, Web Ontology Language (OWL)
All > Technology > E-mail > Microsoft Email > Microsoft Exchange > Microsoft Exchange 2000
A standards-based protocol used with Exchange Data Conferencing. Clients such as Microsoft NetMeeting are T.120 compatible. [Exchange 2000]
- Browse Related Terms: DSAccess, IMAP4 (Internet Messaging Access Protocol version 4), IMPP (Instant Messaging Presence Protocol), LSA (Link State Algorithm), MTA (message transfer agent), NNTP (Network News Transfer Protocol), POP3 (Post Office Protocol version 3), routing service, RVP (Rendezvous Protocol), SMTP (Simple Mail Transfer Protocol), T.120, Virtual server
All > Technology > Defense
All > Technology > Defense
All > Healthcare > Medicine > Cancer
A thyroid hormone. Also called triiodothyronine.
- Browse Related Terms: hyperthyroidism, hypothyroidism, iodine, neuroendocrine tumor, overactive thyroid, T-3, thyroglobulin, thyroid, thyroid cancer, thyroid follicular cell, thyroid gland, thyroid hormone, thyroid hormone treatment, thyroid-stimulating hormone, thyroiditis, triiodothyronine, TSH, underactive thyroid
All > Business > Finance > Investment
Short-term, highly liquid government securities issued at a discount from the face value and returning the face amount at maturity.
- Browse Related Terms: Agency Securities, BA (Banker's Acceptance), Banker’s Acceptance (BA), CDs (Certificates of Deposit), Certificates of Deposit (CD), Commercial Paper, Corporate Bond, Coupon, Federal Funds Rate, Federal Reserve Board, Maturity Date, money-market fund, Moody's Corporate Ratings, Moody's Short-term Debt Ratings, Principal, Salomon Brothers Broad Investment-Grade (BIG) Bond Index, T-Bill (Treasury Bill), Treasury bill (T-bill), Treasury Bond or Note
All > Technology > Defense
All > Technology > Telecommunications
- The generic designator for any of several digitally multiplexed telecommunications carrier systems.
Note 1: The designators for T-carrier in the North American digital hierarchy correspond to the designators for the digital signal (DS) level hierarchy. See the associated table below.
Note 2: T-carrier systems were originally designed to transmit digitized voice signals. Current applications also include digital data transmission.
Note 3: If an "F" precedes the "T", a fiber optic cable system is indicated at the same rates.
Note 4: The table below lists the designators and rates for current T-Carrier systems.
Note 5: The North American and Japanese hierarchies are based on multiplexing 24 voice-frequency channels and multiples thereof, whereas the European hierarchy is based on multiplexing 30 voice-frequency channels and multiples thereof. See table below.T-Carrier Systems North American Japanese European (CEPT) Level zero (Channel data rate) 64 kb/s (DS0) 64 kb/s 64 kb/s First level 1.544 Mb/s (DS1) (24 user channels) 1.544Mb/s (24 user channels) 2.048 Mb/s (30 user channels) (Intermediate level, North American Hierarchy only) 3.152 Mb/s (DS1C) (48 Ch.) - - Second level 6.312 Mb/s (DS2) (96 Ch.) 6.312 Mb/s (96 Ch.), or 7.786 Mb/s (120 Ch.) 8.448 Mb/s (120 Ch.) Third level 44.736 Mb/s (DS3) (672 Ch.) 32.064 Mb/s (480 Ch.) 34.368 Mb/s (480 Ch.) Fourth level 274.176 Mb/s (DS4) (4032 Ch.) 97.728 Mb/s (1440 Ch.) 139.268 Mb/s (1920 Ch.) Fifth level 400.352 Mb/s (5760 Ch.) 565.148 Mb/s (7680 Ch.) 565.148 Mb/s (7680 Ch.) Note 1: The DS designations are used in connection with the North American hierarchy only.
Note 2: There are other data rates in use, e.g., military systems that operate at six and eight times the DS1 rate. At least one manufacturer has a commercial system that operates at 90 Mb/s, twice the DS3 rate. New systems, which take advantage of the high data rates offered by optical communications links, are also deployed or are under development. - Browse Related Terms: access connection, adaptive channel allocation, automatic sounding, basic access, broadband exchange (BEX), Capacity, channel gate, Channelization, circuit transfer mode, common control, common equipment, common-channel interoffice signaling (CCIS), embedded operations channel (EOC), multidestination mode (MD), positioned channel, primary channel, primary rate interface (PRI), restricted channel, secondary channel, statistical multiplexing, T-carrier, terminal
All > Healthcare > Medicine > Cancer
One type of white blood cell that attacks virus-infected cells, foreign cells, and cancer cells. T cells also produce a number of substances that regulate the immune response. Also called T lymphocyte.
- Browse Related Terms: Alum, aluminum sulfate, antigen, antigen-presenting cell, APC, B7-1, booster, cortisone, cytokine, delayed-type hypersensitivity response, DTH, hydrocortisone, hypersensitivity, immune response, immunization, immunocompetence, immunocompetent, immunological adjuvant, omega-3 fatty acid, prednisone, resiquimod, skin test, T cell, T lymphocyte, tetanus toxoid, TNF, tumor necrosis factor, vaccine adjuvant
All > Science > Biotechnology and Genetics > Food Biotechnology
Lymphocytes which pass through the thymus gland during maturation. Different kinds of T cells play important roles in the immune response. Synonym: T lymphocyte. See: T-cell-mediated (cellular) immune response.
- Browse Related Terms: adoptive immunization, allergen, antibody-mediated immune response, auto-immune disease, auto-immunity, B cell, cell-mediated (cellular) immune response, clonal selection, effector cells, humoral immune response, immune response, immunization, immunogenicity, immunoprophylaxis, immunosuppressor, Interleukin, lymphokine, major histocompatibility antigen, memory cell, monokine, multivalent vaccine, passive immunity, phagocytes, primary immune response, secondary immune response, T cell, T-cell-mediated (cellular) immune response, universal donor cell, vaccination
All > Science > Biotechnology and Genetics > Stem Cell
A type of lymphocyte responsible for attacking and destroying virus-infected cells, foreign tissue and tumor cells. Cytotoxic T- cells target a particular antigen and secrete toxic chemicals to kill the foreign cell or tissue. Other T-cells, called Helper T-cells, activate lymphocytes like B- cells and NK cells to help the body fight off invading viruses, micro- organisms and malignant cells.
- Browse Related Terms: Cytokines, Granulocyte, immune system, Immune-function assay, Immunodeficient, Immunogenic, Leukocyte (White Blood Cell), lymph node, Lymph nodes, natural killer cell, T cell, T cells, T lymphocyte, Thymus, Tolerance induction, White Blood Cells
All > Healthcare > Medicine > Cancer
(...LIM-foh-BLAS-tik loo-KEE-mee-uh) A type of leukemia (blood cancer) in which too many T-cell lymphoblasts (immature white blood cells) are found in the blood and bone marrow. Also called precursor T-lymphoblastic leukemia and T-cell acute lymphocytic leukemia.
- Browse Related Terms: acute lymphoblastic leukemia, acute lymphocytic leukemia, acute promyelocytic leukemia, ALL, APL, B-cell acute lymphoblastic leukemia, B-cell acute lymphocytic leukemia, BLAST, chronic lymphoblastic leukemia, chronic lymphocytic leukemia, CLL, erythroleukemia, lymphoblast, lymphoblastic, myeloblastic, petechiae, precursor B-lymphoblastic leukemia, precursor T-lymphoblastic leukemia, promyelocytic leukemia, stage 0 chronic lymphocytic leukemia, T-cell acute lymphoblastic leukemia, T-cell acute lymphocytic leukemia
All > Healthcare > Medicine > Cancer
(...LIM-foh-SIH-tik loo-KEE-mee-uh) A type of leukemia (blood cancer) in which too many T-cell lymphoblasts (immature white blood cells) are found in the blood and bone marrow. Also called precursor T-lymphoblastic leukemia and T-cell acute lymphoblastic leukemia .
- Browse Related Terms: acute lymphoblastic leukemia, acute lymphocytic leukemia, acute promyelocytic leukemia, ALL, APL, B-cell acute lymphoblastic leukemia, B-cell acute lymphocytic leukemia, BLAST, chronic lymphoblastic leukemia, chronic lymphocytic leukemia, CLL, erythroleukemia, lymphoblast, lymphoblastic, myeloblastic, petechiae, precursor B-lymphoblastic leukemia, precursor T-lymphoblastic leukemia, promyelocytic leukemia, stage 0 chronic lymphocytic leukemia, T-cell acute lymphoblastic leukemia, T-cell acute lymphocytic leukemia
All > Healthcare > Medicine > Cancer
(... sel dih-PLEE-shun) Treatment to destroy T cells, which play an important role in the immune response. Elimination of T cells from a bone marrow graft from a donor may reduce the chance of an immune reaction against the recipient's tissues.
- Browse Related Terms: CMV, cytomegalovirus, graft-versus-tumor, hepatic veno-occlusive disease, immunosuppression, peripheral blood lymphocyte therapy, peripheral stem cell support, peripheral stem cell transplantation, stem cell transplantation, T-cell depletion, tacrolimus, total-body irradiation
All > Healthcare > Medicine > Cancer
(... sel lim-FOH-muh) A disease in which certain cells of the lymph system (called T lymphocytes) become cancerous.
- Browse Related Terms: contiguous lymphoma, noncontiguous lymphoma, stage I adult Hodgkin lymphoma, stage I adult non-Hodgkin lymphoma, stage I childhood Hodgkin lymphoma, stage I childhood non-Hodgkin lymphoma, stage II adult Hodgkin lymphoma, stage II adult non-Hodgkin lymphoma, stage II childhood Hodgkin lymphoma, stage III adult Hodgkin lymphoma, stage III adult non-Hodgkin lymphoma, stage III AIDS-related lymphoma, stage III childhood Hodgkin lymphoma, stage III childhood non-Hodgkin lymphoma, stage IV adult Hodgkin lymphoma, stage IV adult non-Hodgkin lymphoma, stage IV childhood Hodgkin lymphoma, T-cell lymphoma
All > Science > Biotechnology and Genetics > Food Biotechnology
The synthesis of antigen-specific T cell receptors and the development of killer T cells in response to an encounter of immune system cells with an unrecognized immunogenic molecule.
- Browse Related Terms: adoptive immunization, allergen, antibody-mediated immune response, auto-immune disease, auto-immunity, B cell, cell-mediated (cellular) immune response, clonal selection, effector cells, humoral immune response, immune response, immunization, immunogenicity, immunoprophylaxis, immunosuppressor, Interleukin, lymphokine, major histocompatibility antigen, memory cell, monokine, multivalent vaccine, passive immunity, phagocytes, primary immune response, secondary immune response, T cell, T-cell-mediated (cellular) immune response, universal donor cell, vaccination
All > Science > Biotechnology and Genetics > Food Biotechnology
An antigen -binding protein, located on the surface of mammalian killer T cells, which mediates the cellular immune response. T cell antigen encoding genes are assembled from gene segments by processes that occur during lymphocyte differentiation.
- Browse Related Terms: Drosophila melanogaster, Joining (J) segment, joining segment, major histocompatibility complex, pair-rule gene, recombinant toxin, segment-polarity gene, T cell receptor, tribrid protein
All > Science > Biotechnology and Genetics > Stem Cell
A type of white blood cell that is of crucial importance to the immune system. Immature T cells migrate to the thymus gland in the upper chest cavity, where they mature and differentiate into various types of mature T cells and become active in the immune system in response to a hormone called thymosin and other factors. T-cells that are potentially activated against the body's own tissues are normally killed or changed ("down-regulated") during this maturation process.
- Browse Related Terms: Cytokines, Granulocyte, immune system, Immune-function assay, Immunodeficient, Immunogenic, Leukocyte (White Blood Cell), lymph node, Lymph nodes, natural killer cell, T cell, T cells, T lymphocyte, Thymus, Tolerance induction, White Blood Cells
All > Technology > Telecommunications
A passive optical coupler having three ports (three fibers). Note 1: Two isolated inputs may be combined into one output; or one input, into two isolated outputs. Note 2: The amount of coupling loss, usually expressed in dB, between ports is determined by the design and construction of the coupler. [After FAA] Synonyms directional coupler, splitter, tee coupler.
- Browse Related Terms: Amplifier, attenuator, bandwidth (of an optical fiber), medium access unit (MAU), noise current, noise voltage, optical detector, optical junction, photon noise, quantum efficiency, quantum noise, shot noise, source efficiency, spectral responsivity, star coupler, T-coupler, transfer function
All > Science > Biotechnology and Genetics > Food Biotechnology
The DNA segment of the Ti plasmid, present in pathogenic Agrobacterium tumefaciens, that is transferred to plant cells and inserted into the plant's DNA as part of the infection process. Wild type T-DNA encodes enzymes that induce the plant to synthesize specific opines that are required for bacterial growth. In engineered T-DNA s, these genes are replaced by a transgene (s).
- Browse Related Terms: Agrobacterium, Agrobacterium rhizogenes, Agrobacterium tumefaciens-mediated transformation, binary vector system, crown gall, gall, opine, Ri plasmid, T-DNA, Ti (tumor-inducing) plasmid, Ti plasmid
All > Science > Biotechnology and Genetics > Food Biotechnology
The transforming region of DNA in the Ti plasmid of Agrobacterium tumefaciens.
- Browse Related Terms: carrier DNA DNA, co-integrate vector system, E. coli, episome, F factor, Hfr, incompatibility group, IPTG, mobilization, par gene, pBR322, Plasmid (p), relaxed circle plasmid, resistance factor, T-DNA (transfer DNA, tumor-DNA), tripartite mating, Tumor-inducing plasmid, tumour-inducing plasmid
All > Technology > Defense
Test and Evaluation.
- Browse Related Terms: ACETEF, Air Force Operational Test and Evaluation Center (AFOTEC), Capstone Test and Evaluation Master Plan (Capstone TEMP), CDT&E, COMOPTEVFOR, CTE, CTEIP, DOT&E, DT&E, DTSE&E, Follow-On Operational Test and Evaluation (FOT&E), FOT&E, IOT&E, JT&E, LFT&E, Life Cycle of a Weapon System, MCOTEA, OPTEC, OPTEVFOR, OT&E, PAT&E, RDT&E, Research, Development, Test, and Evaluation (RDT&E), Sys T&E, T&E, Technical Evaluation, TECOM, TEIPT, TEMP, TEP, TER, TERC, TESP, TEV, TEWG, TT&E, USAOTEC, USATECOM