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  • BIV

    Bovine Immunodeficiency Virus
  • BIVAS

    Body Image Visual Analog Scale
  • BL

    Biosafety Level
  • BL

    Biosafety Laboratory
  • BLA

    Biologics License Application
  • BLA (Biologics License Application)

    The required application for marketing a biologic product in the United States. Most biopharmaceuticals are biologics.
  • Black Box Testing

  • Black Box Warning

  • Blank

    A preliminary analysis omitting only the sample to provide an unbiased reference point or baseline for comparison. It is important to minimize extraneous contamination that could be confused with constituents in the sample itself.
  • Blanketing

    Blanketing is the term used to describe putting a layer of gas, typically nitrogen into the space in a vessel above the product generally with the intention of preventing oxygen in the air contacting and degrading the product, though it may also be used to maintain a low oxygen atmosphere to reduce risks ox explosion.
  • Blastocyst

    A preimplantation embryo of about 150 cells. The blastocyst consists of a sphere made up of an outer layer of cells (the trophectoderm), a fluid-filled cavity (the blastocoel), and a cluster of cells on the interior (the inner cell mass).
  • Blastomere

    Any one of the cells formed from the first few cleavages in animal embryology. The embryo usually divides into two, then four, then eight blastomeres, and so on.
  • Bleach

    A fluid, powder or other whitening (bleaching) or cleaning agent, usually with free chlorine ions. Commercial bleach contains calcium hypochlorite or sodium hypochlorite, and is a common disinfectant used for cleaning working surfaces, tools and plant materials in plant tissue culture and grafting.
  • Blind

    A randomized trial is “Blindâ€? if the participant is not told which arm of the trial they are on. A clinical trial is “Blindâ€? if participants are unaware of whether they are in the experimental or control arm of the study; also called “Maskedâ€?. • Phase I Clinical Trial • Phase II Clinical Trial • Phase III Clinical trial • Phase IV Clinical Trial
  • Blind Study

    Study where the test article and the reference standard are blinded (look alike) an provided in uniquely identified containers (e.g., subject specific, unit doses or IVR) with a randomization code assigned. Supplies may be randomized in”blocks” where a statistical ratio of test article to reference standard has been allocated. In these cases, random selection should be in block sizes in sufficient quantity to meet the retention sample requirements.
  • Blind Weld

    A weld joint by design that cannot feasibly be visually inspected internally.
  • Blinded or Blinding

    A method used in a clinical trial to prevent participants and/or researchers from knowing whether the patient is receiving the experimental or control treatment in a trial. Also referred to as “masking.” Single blinding is when only the patient does not know which treatment he or she is receiving.
  • Blinding

    The process by which the physical appearance of a comparative agent (or other drug product) is altered to obscure the identity of the drug product. Often obscured in such a way as to look like other products.
  • Blinding

    Clinical trial technique in which, to eliminate bias in a research study, subjects and/or clinical investigators remain unaware of which investigational product is provided.
  • Blinding

    A procedure in which one or more patients to the clinical trial (i.e., the subject/patient, investigator, and/or sponsor medical personnel) are kept unaware of the treatment assignment(s) of the clinical trial participants. Used to remove potential for study bias
  • BLM

    Bureau of Land Management (United States Department of the Interior)
  • Block

    (ISO) A string of records, words, or characters that for technical or logical purposes are treated as a unity.
  • Block

    A collection of contiguous records that are recorded as a unit, and the units are separated by interblock gaps.
  • Block

    In programming languages, a subdivision of a program that serves to group related statements, delimit routines, specify storage allocation, delineate the applicability of labels, or segment parts of the program for other purposes. In FORTRAN, a block may be a sequence of statements; in COBOL, it may be a physical record.
  • Block

    A group of bits or digits that are transmitted as a unit and that may be encoded for error-control purposes.