Rubidium standard: A rubidium standard or rubidium atomic clock is a frequency standard in which a specified hyperfine transition of electrons in rubidium-87 atoms is used to control the output frequency. It is the most inexpensive, compact, and widely used type of atomic clock, used to control the frequency of television stations, cell phone base stations, in test equipment, and global navigation satellite systems like GPS.List of radioactive isotopes by half-life: This is a list of radioactive isotopes ordered by half-life from shortest to longest.Trans-tubular potassium gradient: The trans-tubular potassium gradient (TTKG) is an index reflecting the conservation of potassium in the cortical collecting ducts (CCD) of the kidneys. It is useful in diagnosing the causes of hyperkalemia or hypokalemia.Caesium bromideFXYD familyThallium halides: The thallium halides include monohalides, where thallium has oxidation state +1, trihalides where thallium generally has oxidation state +3 and some intermediate halides with mixed +1 and +3 oxidation states. These materials find use in specialized optical settings, such as focusing elements in research spectrophotometers.Fractional sodium excretion: The fractional excretion of sodium (FENa) is the percentage of the sodium filtered by the kidney which is excreted in the urine. It is measured in terms of plasma and urine sodium, rather than by the interpretation of urinary sodium concentration alone, as urinary sodium concentrations can vary with water reabsorption.Vanadium redox battery: The vanadium redox (and redox flow) battery (VRB) is a type of rechargeable flow battery that employs vanadium ions in different oxidation states to store chemical potential energy. The vanadium redox battery exploits the ability of vanadium to exist in solution in four different oxidation states, and uses this property to make a battery that has just one electroactive element instead of two.Cascade storage system: A cascade storage system is a high pressure gas cylinder system which is used for the refilling of smaller compressed gas cylinders or air cylinders. Each of the large cylinders is filled by a compressor, but the cascade system allows small cylinders to be filled without a compressor.Transcellular transport: Transcellular transport involves the transportation of solutes by a cell through a cell. One classic example is the movement of glucose from the intestinal lumen to extracellular fluid by epithelial cells.Alkali metal oxide: The alkali metals react with oxygen to form several different compounds: suboxides, oxides, peroxides, superoxides, and ozonides. They all react violently with water.Logorrhea (psychology): In psychology, logorrhea or logorrhoea (from Ancient Greek λόγος logos "word" and ῥέω rheo "to flow") is a communication disorder, expressed by excessive wordiness with minor or sometimes incoherent talkativeness. Logorrhea is sometimes classified as a mental illness, resulting in a variety of psychiatric and neurological disorders including aphasia, localized cortical lesions in the thalamus, mania, or most typically in catatonic schizophrenia.DigoxinLithium (medication)HyperchloremiaErythrocrine: Erythrocrine describes red blood cell or erythrocyte for production and release of signaling molecules. The term “erythrocrine“ was coined by Song et al.Phosphoramidate: A phosphoramidate is a phosphate that has an NR2 instead of an OH group. The structure of phosphoramidic acid (phosphoramidate), (HO)2PONH2, is present in PubChem.Hemiphractidae: The Hemiphractidae are a family of frogs from South and Central America. Previously, this group had been classified as a subfamily (Hemiphractinae) under family Hylidae.Sodium decavanadateGramicidinAnkyrin-G binding motif of KCNQ2-3: In molecular biology, the ankyrin-G binding motif of KCNQ2-3 is a protein motif found in the potassium channels KCNQ2 and KCNQ3.Sodium hexametaphosphateMediated transportReversal potential: In a biological membrane, the reversal potential (also known as the Nernst potential) of an ion is the membrane potential at which there is no net (overall) flow of that particular ion from one side of the membrane to the other. In the case of post-synaptic neurons, the reversal potential is the membrane potential at which a given neurotransmitter causes no net current flow of ions through that neurotransmitter receptor's ion channel.Kennel club