description link name type Arbitrary Fluorescence Units http://purl.obolibrary.org/obo/NCIT_C77534 AFU concentration Antibody Index https://www.aacc.org/publications/cln/articles/2014/june/ana-testing AI concentration Antibody titer is a titer of antibody that shows how much antibody an organism has produced that recognizes a particular epitope, expressed as the greatest dilution ratio (or its reciprocal) that still gives a positive result. ELISA is a common means of determining antibody titers. http://purl.obolibrary.org/obo/VO_0000150 Antibody titer Titer Arithmetic Mean Fluorescence Intensity Unit http://purl.obolibrary.org/obo/NCIT_C163562 Arithmetic Mean Fluorescence Intensity Unit (aMFI) Fluorescence Intensity Unit Unit of measure of potency of allergenic product expressed as a number of allergy units per one milliliter of formulation. http://purl.obolibrary.org/obo/NCIT_C70504 AU/ml concentration The unit of measure for the number of paired nucleotides in a DNA or RNA sequence. UMLS CUI:C4318478, has exact synonym: Base Pair Unit; BASE PAIRS; BP; {BP} http://purl.obolibrary.org/obo/NCIT_C132477 Base Pair Unit Quantitative Concept A stage for hepatocellular carcinoma defined according to the Barcelona Clinic Liver Cancer (BCLC) criteria. http://purl.obolibrary.org/obo/NCIT_C115134 BCLC Stage Classification The number of heartbeats measured per minute time. http://purl.obolibrary.org/obo/NCIT_C49673 Beats per Minute Quantitative Concept The result of a body mass index measurement. [Definition Source: NCI] http://purl.obolibrary.org/obo/NCIT_C138901 Body Mass Index Finding Finding The type of an expression with two possible values, "true" and "false". http://purl.obolibrary.org/obo/NCIT_C45254 Boolean Qualitative Concept The number of breaths (inhalation and exhalation) taken per minute time. http://purl.obolibrary.org/obo/NCIT_C49674 Breaths per Minute Quantitative Concept Celsius http://purl.obolibrary.org/obo/UO_0000027 C temperature A dosing unit equal to the amount of active ingredient(s) contained in a capsule. http://purl.obolibrary.org/obo/NCIT_C48480 Capsule Dosing Unit Quantitative Concept Categorical data are types of data which may be divided into groups. http://purl.obolibrary.org/obo/NCIT_C142412 categorical derived_result cell count http://purl.obolibrary.org/obo/NCIT_C48938 cells derived_flow Cells per kg body weight https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4138781/ cells/kg body weight concentration A unit of cell concentration expressed in cells per unit of volume equal to one milliliter. http://purl.obolibrary.org/obo/NCIT_C74919 cells/ml derived_flow A unit of cell concentration expressed as a number of cells per unit volume equal to one microliter. http://purl.obolibrary.org/obo/NCIT_C67242 cells/ul derived_flow The minimum number of separable cells which is able to produce a detectable colony of progeny. https://ontobee.org/ontology/NCIT?iri=http://purl.obolibrary.org/obo/NCIT_C68742 CFU varchar A derived unit of viable cell concentration defined as the number of colony forming units in one milliliter of substance http://purl.obolibrary.org/obo/NCIT_C68902 CFU/ml concentration A basic unit of length in the former CGS version of metric system, equal to one hundredth of a meter or approximately 0.393 700 787 inch. http://purl.obolibrary.org/obo/NCIT_C49668 cm length Determining the number or amount of something. http://purl.obolibrary.org/obo/NCIT_C25463 Count Activity Threshold cycle (or Ct or Cq) is a count which is defined as the fractional PCR cycle number at which the reporter fluorescence is greater than the threshold in the context of the RT-qPCR assay. http://purl.obolibrary.org/obo/STATO_0000190 Cq PCR Threshold cycle (or Ct or Cq) is a count which is defined as the fractional PCR cycle number at which the reporter fluorescence is greater than the threshold in the context of the RT-qPCR assay. http://purl.obolibrary.org/obo/STATO_0000190 Ct PCR The time for Earth to make a complete rotation on its axis; ordinarily divided into twenty-four hours, equal to 86 400 seconds. This also refers to a specific day. http://purl.obolibrary.org/obo/NCIT_C25301 Day Temporal Concept Difference between the target gene and the reference gene. http://www.ncbi.nlm.nih.gov/pubmed/11846609 Delta Ct PCR Difference between the Delta Ct target gene of the treated sample and the Delta Ct of the target gene of the untreated sample. http://www.ncbi.nlm.nih.gov/pubmed/11846609 Delta Delta Ct PCR The NIDDK calibrators were tested together with dilutions of the WHO reference serum using harmonized assays on five occasions in the BDC, Bristol, and Munich laboratories and reported as WHO units/ml by calibration as previously described. For each of the NIDDK calibrators, the median value of the WHO units/ml obtained for the 15 measurements was assigned as its calibrator unit. The assigned units were termed digestive and kidney units (DK units)/ml. https://repository.niddk.nih.gov/studies/aab-calibrators/ DK units/ml concentration Information about the donor. http://purl.obolibrary.org/obo/NCIT_C158611 Donor Information Conceptual Entity A quantity of an agent (such as substance or energy) administered, taken, or absorbed at one time. http://purl.obolibrary.org/obo/NCIT_C25488 Dose Conceptual Entity Fahrenheit http://purl.obolibrary.org/obo/UO_0000195 F temperature Fragments Per Kilobase Million: Normalized expression value of a given gene as measured by paired-end RNA sequencing http://www.ncbi.nlm.nih.gov/pubmed/22872506 FPKM gene_expression A unit of mass concentration defined as the concentration of one gram of a substance per unit volume of the mixture equal to one deciliter (100 milliliters). The concept also refers to the metric unit of mass density (volumic mass) defined as the density of substance which mass equal to one gram occupies the volume one deciliter. http://purl.obolibrary.org/obo/NCIT_C64783 g/dl concentration grams per liter http://purl.obolibrary.org/obo/UO_0000175 g/l concentration Characteristics of people that are socially constructed, including norms, behaviors, and roles based on sex. As a social construct, gender varies from society to society and can change over time. (Adapted from WHO.) http://purl.obolibrary.org/obo/NCIT_C17357 Gender Organism Attribute A unit of measure for the geometric mean fluorescence intensity. http://purl.obolibrary.org/obo/NCIT_C163563 Geometric Mean Fluorescence Intensity Unit (gMFI) Fluorescence Intensity Unit gram http://purl.obolibrary.org/obo/UO_0000021 gm mass A position on a scale of intensity or amount or quality. http://purl.obolibrary.org/obo/NCIT_C48309 Grade Quantitative Concept A SI derived unit of absorbed radiation dose. One gray is equal to an absorbed dose of one joule per kilogram of matter, or to 100 rads. https://uts.nlm.nih.gov/uts/umls/concept/C0556636 Gy Not_Specified hemagglutination units http://en.wikipedia.org/wiki/Virus_quantification HAU concentration A unit measure of time equal to 3,600 seconds or 60 minutes. It is approximately 1/24 of a median day. http://purl.obolibrary.org/obo/NCIT_C25529 Hour Temporal Concept A traditional unit of length equal to 1/12 of a foot or 2.54 centimeters. http://purl.obolibrary.org/obo/NCIT_C48500 in length The unitage assigned by the WHO to International Biological Standards - substances, classed as biological according to the criteria provided by WHO Expert Committee on Biological Standardization (e.g. hormones, enzymes, and vaccines), to enable the results of biological and immunological assay procedures to be expressed in the same way throughout the world. The definition of an international unit is generally arbitrary and technical, and has to be officially approved by the International Conference for Unification of Formulae. http://purl.obolibrary.org/obo/NCIT_C48579 IU mass Unit of arbitrary substance concentration (biologic activity concentration) defined as the concentration of one international unit per one liter of the system volume. http://purl.obolibrary.org/obo/NCIT_C67376 iu/l concentration A unit of arbitrary substance concentration (biologic activity concentration) defined as the concentration of one international unit per one milliliter of system volume. http://purl.obolibrary.org/obo/NCIT_C67377 IU/ml concentration Kelvin http://purl.obolibrary.org/obo/UO_0000012 K temperature An arbitrary unit of a kallikrein inactivator concentration equal to the concentration at which one milliliter of the mixture contains one unit of the kallikrein inactivator. http://purl.obolibrary.org/obo/NCIT_C73531 Kallikrein Inactivator Unit per Milliliter concentration A basic SI unit of mass. It is defined as the mass of an international prototype in the form of a platinum-iridium cylinder kept at Sevres in France. A kilogram is equal to 1,000 grams and 2.204 622 6 pounds. http://purl.obolibrary.org/obo/NCIT_C28252 kg mass Kilogram per Square Meter, the SI derived unit of spread rate of a substance by mass, used also as a measure of area density and as a dose calculation unit. http://purl.obolibrary.org/obo/NCIT_C49671 kg/m2 area density The non-SI unit of volume accepted for use with the SI. One liter is equal to cubic decimeter, or one thousandth of cubic meter, or 1000 cubic centimeters, or approximately 61.023 744 cubic inches. http://purl.obolibrary.org/obo/NCIT_C48505 l volume Liter per Second: A metric unit of volumetric flow rate defined as the rate at which one liter of matter crosses a given surface during the period of time equal to one second. http://purl.obolibrary.org/obo/NCIT_C67390 L/sec Quantitative Concept molar http://purl.obolibrary.org/obo/UO_0000062 M concentration A unit of measure for the mean fluorescence intensity (when the mathematic calculation is unspecified or unknown). http://purl.obolibrary.org/obo/NCIT_C163046 Mean Fluorescence Intensity Unit (MFI,FIU) Fluorescence Intensity Unit A unit of measure equal to the median fluorescence intensity of a log-normal distribution of fluorescence signals. http://purl.obolibrary.org/obo/NCIT_C96687 Median Fluorescence Intensity Unit (MdFI) Fluorescence Intensity Unit Mean Fluorescence Intensity at 90th Percentile. MFI : A unit of measure equal to the geometric mean fluorescence intensity of a log-normal distribution of fluorescence signals. http://purl.obolibrary.org/obo/NCIT_C96687 MFI at 90th percentile derived_flow milligram http://purl.obolibrary.org/obo/UO_0000022 mg mass A unit of mass concentration defined as the concentration of one milligram of a substance in unit volume of the mixture equal to one cubic deciliter or 100 cubic centimeters. It is also a unit of mass density (volumic mass) defined as the density of substance which mass equal to one milligram occupies the volume one cubic deciliter or 100 cubic centimeters. http://purl.obolibrary.org/obo/NCIT_C67015 mg/dl concentration Milligrams Per Kilogram, used in dosing calculations, especially weight based dosing in pharmacology http://purl.obolibrary.org/obo/NCIT_C42579 mg/kg mass A metric unit of mass concentration defined as the concentration of one gram of a substance per unit volume of the mixture equal to one cubic meter. The concept also refers to the metric unit of mass density (volumic mass) defined as the density of a substance which mass equal to one gram occupies the volume of one cubic meter. http://purl.obolibrary.org/obo/NCIT_C64572 mg/l concentration microgram per milliliter http://purl.bioontology.org/ontology/SNOMEDCT/258798001 mg/ml concentration A unit of a mass fraction expressed as a number of milligrams of substance per kilogram of mixture. The unit is also used as a dose calculation unit. Has exact synonym: Attogram per Picogram; Milligram/Kilogram; Yoctogram per Attogram; milligram per kilogram; fg/ng; Femtogram per Nanogram; ng/mg; milligram(s)/kilogram; pg/mcg; ag/pg; Microgram per Gram; Nanogram per Milligram; Zeptogram per Femtogram; mcg/g; yg/ag; Picogram per Microgram; mg/kg; ug/g; zg/fg; Milligram per Kilogram; pg/ug; mg/kilo http://purl.obolibrary.org/obo/NCIT_C67401 Milligram per Kilogram Unit of Mass Fraction Unit of arbitrary substance concentration (biologic activity concentration) defined as the concentration of one international unit per one liter of the system volume. http://purl.obolibrary.org/obo/NCIT_C67376 miu/ml concentration milliliter http://purl.obolibrary.org/obo/UO_0000098 ml volume Milliliter per Minute: A metric unit of volumetric flow rate defined as the rate at which one milliliter of matter crosses a given surface during the period of time equal to one minute. http://purl.obolibrary.org/obo/NCIT_C64777 mL/min Quantitative Concept Milliliter per Minute per 1.73 m2 of Body Surface Area: A unit used in the calculation of a rate of the substance removal from the body (such as creatinine clearance) for the measurement of renal excretory function, with the applied correction factor for body size. It is also used as a dose delivery rate calculation unit equal to the rate, at which one milliliter of medication is delivered during a period of time equal to one minute per 1.73 square meters of body surface area. http://purl.obolibrary.org/obo/NCIT_C67412 mL/min/(173/100).m2 Quantitative Concept Milliliter per Minute per Millimeters of Mercury: A unit for measuring a pulmonary diffusing capacity expressed in units of gas flow rate (in milliliters per minute) per a unit of pressure (in torrs). http://purl.obolibrary.org/obo/NCIT_C67417 mL/min/mmHg Quantitative Concept millimolar http://purl.obolibrary.org/obo/UO_0000063 mM concentration Millimeter of Mercury: A non-SI unit of pressure equal to 133,332 Pa or 1.316E10-3 standard atmosphere. Use of this unit is generally deprecated by ISO and IUPAC. http://purl.obolibrary.org/obo/NCIT_C49670 mmHg Quantitative Concept multiplicity of infection http://en.wikipedia.org/wiki/Multiplicity_of_infection MOI concentration One of the 12 divisions of a year as determined by a calendar. It corresponds to the unit of time of approximately to one cycle of the moon's phases, about 30 days or 4 weeks. http://purl.obolibrary.org/obo/NCIT_C29846 Month Temporal Concept A 20-item self-report instrument designed to measure fatigue. It covers the following dimensions: General Fatigue, Physical Fatigue, Mental Fatigue, Reduced Motivation and Reduced Activity. http://purl.obolibrary.org/obo/NCIT_C54719 Multidimensional Fatigue Inventory Intellectual Product nanogram http://purl.obolibrary.org/obo/UO_0000024 ng mass A unit of mass concentration defined as the concentration of one nanogram of a substance per unit volume of the mixture equal to one deciliter. The concept also refers to the unit of mass density (volumic mass) defined as the density of substance which mass equal to one nanogram occupies the volume of one deciliter. http://purl.obolibrary.org/obo/NCIT_C67326 ng/dl concentration nanogram per milliliter http://purl.bioontology.org/ontology/SNOMEDCT/258806002 ng/ml concentration nanogram per nanoliter ng/nl concentration nanogram per microliter http://purl.bioontology.org/ontology/SNOMEDCT/272082007 ng/ul concentration nanoliter http://purl.obolibrary.org/obo/UO_0000102 nl volume nanomolar http://purl.obolibrary.org/obo/UO_0000065 nM concentration A relative fluorescence intensity unit that is adjusted to a reference standard. http://purl.obolibrary.org/obo/NCIT_C154680 Normalized Fluorescence Intensity Unit Fluorescence Intensity Unit No value provided. Not stated explicitly or in detail. http://purl.obolibrary.org/obo/NCIT_C38046 Not Specified Not_Specified NPX, Normalized Protein eXpression, is Olink's arbitrary unit which is in Log2 scale. It is calculated from Ct values and data pre-processing (normalization) is performed to minimize both intra- and inter-assay variation. NPX data allows users to identify changes for individual protein levels across their sample set, and then use this data to establish protein signatures. The NPX scale is inverted compared to that of Ct. This means that a high NPX value equals a high protein concentration. Because NPX is in a log2 scale, a 1 NPX difference means a doubling of protein concentration. If needed NPX values can be converted into linear scale: 2^NPX= linear NPX. https://www.olink.com/question/what-is-npx/ NPX concentration A measurement of the total number of events that have occurred. http://purl.obolibrary.org/obo/NCIT_C124281 Number of Episodes Quantitative Concept The measurement of the light transmitted through a sample for a given wavelength. [database_cross_reference: ISBN:038733341X] http://purl.obolibrary.org/obo/CHMO_0002039 optical density concentration A fraction or ratio with 100 understood as the denominator. e.g. percentage of a cell population of interest within a parent population http://purl.obolibrary.org/obo/NCIT_C25613 percentage derived_flow Plaque-forming unit. A measure of viable infectious entities (e.g. viral particles or group of particles) in the specimen or product defined as the smallest quantity that can produce a cytopathic effect in the host cell culture challenged with the defined inoculum, visible under the microscope and/or to the naked eye as a plaque. A number of plaque forming units (PFU) per unit volume is a conventional way to refer the titer of an infective entity in a specimen or preparation. http://purl.obolibrary.org/obo/NCIT_C67264 PFU concentration Plaque-forming unit equivalents http://purl.obolibrary.org/obo/NCIT_C67264 PFUe concentration picogram http://purl.obolibrary.org/obo/UO_0000025 pg mass Protein/Creatinine [Ratio] in Urine http://purl.obolibrary.org/obo/NCIT_C85780 pg/mg creatinine concentration picogram per milliliter http://purl.obolibrary.org/obo/NCIT_C67327 pg/ml concentration picogram per nanoliter pg/nl concentration picogram per microliter http://purl.obolibrary.org/obo/NCIT_C67306 pg/ul concentration picoliter http://purl.obolibrary.org/obo/UO_0000103 pl volume picomolar http://purl.obolibrary.org/obo/UO_0000066 pM concentration A numeric unit used to quantify a score. http://purl.obolibrary.org/obo/NCIT_C113499 Point Quantitative Concept The traditional unit of mass. By international agreement, one avoirdupois pound is equal to exactly 0.453 592 37 kilogram, 16 ounces, or 1.215 28 troy pounds. http://purl.obolibrary.org/obo/NCIT_C48531 Pound mass Quotient of quantities of the same kind for different components within the same system. http://purl.obolibrary.org/obo/NCIT_C44256 Ratio Quantitative Concept A unit of measurement that estimates the size or amount of material in a sample by normalizing its luminescence to that of a reference standard. http://purl.obolibrary.org/obo/NCIT_C77535 Relative Fluorescence Intensity Unit Fluorescence Intensity Unit Reads Per Kilobase Million: Normalized expression value of a given gene as measured by single-end RNA sequencing http://www.ncbi.nlm.nih.gov/pubmed/22872506 RPKM gene_expression An ordered reference standard used to measure incremental changes. http://purl.obolibrary.org/obo/NCIT_C25664 Scale Intellectual Product A test used to determine the amount of tears collected on a filter paper strip in 5 minutes. http://purl.obolibrary.org/obo/NCIT_C75526 Schirmer Test Wetting Finding A number or range of numeric values measuring performance, function, quality, or ability. http://purl.obolibrary.org/obo/NCIT_C25338 Score Quantitative Concept Fold change comparing stimulated vs unstimulated sample https://en.wikipedia.org/wiki/Fold_change stim/unstim fold change derived_flow mean tissue culture infective dose http://en.wikipedia.org/wiki/Virus_quantification TCID50 concentration A unit of cell concentration expressed as a number of cells in thousands per unit volume equal to one microliter. Synonyms: 10E3 Cells/uL, Kcells/ul. https://uts.nlm.nih.gov/uts/umls/concept/C1883312 Thousand Cells per Microliter concentration A titer (or titre) is a measure of concentration. Titer testing employs serial dilution to obtain approximate quantitative information from an analytical procedure that inherently only evaluates as positive or negative. The titer corresponds to the highest dilution factor that still yields a positive reading; for example, positive readings in the first 8 serial twofold dilutions translate into a titer of 1:256. http://purl.obolibrary.org/obo/VO_0000555 titer Titer Transcripts per million reads- Measurement of mRNA abundance using RNA-seq data http://www.ncbi.nlm.nih.gov/pubmed/22872506 TPM gene_expression microgram http://purl.obolibrary.org/obo/UO_0000023 ug mass A unit of mass concentration defined as the concentration of one microgram of a substance per unit volume of the mixture equal to one deciliter. The concept also refers to the unit of mass density (volumic mass) defined as the density of substance which mass equal to one microgram occupies the volume one deciliter. http://purl.obolibrary.org/obo/NCIT_C67305 ug/dl concentration Microgram per Kilogram: A unit of a mass fraction expressed as a number of micrograms of substance per kilogram of mixture. The unit is also used as a dose calculation unit. http://purl.obolibrary.org/obo/NCIT_C67396 ug/kg Quantitative Concept A unit of mass concentration defined as the concentration of one microgram of a substance per unit volume of the mixture equal to one liter. The concept also refers to the unit of mass density (volumetric mass) defined as the density of a substance which mass equal to one microgram occupies the volume of one liter. http://purl.obolibrary.org/obo/NCIT_C67306 ug/l concentration microgram per milliliter http://purl.bioontology.org/ontology/SNOMEDCT/258801007 ug/ml concentration microgram per microliter http://purl.obolibrary.org/obo/NCIT_C42576 ug/ul concentration Microgram Equivalents Per Gram: A concentration unit measured as a number of microgram equivalents per gram of substance. http://purl.obolibrary.org/obo/NCIT_C166087 ugEq/g Intellectual Product Unit of arbitrary substance concentration (biologic activity concentration) defined as the concentration of one millionth of international unit per one milliliter of system volume. http://purl.obolibrary.org/obo/NCIT_C67405 uiu/ml concentration microliter http://purl.obolibrary.org/obo/UO_0000101 ul volume micromolar http://purl.bioontology.org/ontology/SNOMEDCT/258814008 uM concentration A unit of concentration (molarity unit) equal to one one-millionth of a mole (10E-6 mole) of solute per one liter of solution. http://purl.obolibrary.org/obo/NCIT_C48508 umol/l concentration An arbitrary unit of substance content expressed in unit(s) per gram. http://purl.obolibrary.org/obo/NCIT_C77606 Unit per Gram Arbitrary Unit of Substance Rate Enzyme Unit per Milliliter. Unit of catalytic activity concentration defined as activity equal to one enzyme unit per one milliliter of system volume. http://purl.bioontology.org/ontology/SNOMEDCT/259002007 units/ml concentration Any period of seven consecutive days. http://purl.obolibrary.org/obo/NCIT_C29844 Week Temporal Concept A period of time that it takes for Earth to make a complete revolution around the sun, approximately 365 days; a specific one year period. http://purl.obolibrary.org/obo/NCIT_C29848 Year Temporal Concept A response or indicator that can have a value of yes, no, or unknown. http://purl.obolibrary.org/obo/NCIT_C38148 Yes, No, or Unknown Response Classification A method for converting an individual score into a standard form. The z-score indicates how far and in what direction an item deviates from its distribution's mean, expressed in units of standard deviation. Calculation of a z-score requires knowledge about the population's standard deviation and mean. http://purl.obolibrary.org/obo/NCIT_C68741 Z-Score Quantitative Concept