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Abbreviation: OPA
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Long Form No. Long Form Research Area Co-occurring Abbreviation PubMed/MEDLINE Info. (Year, Title)
o-phthalaldehyde
(443 times)
Chemistry Techniques, Analytical
(149 times)
HPLC (57 times)
NAC (20 times)
GABA (17 times)
1978 Fluorometric amino-acid analysis with o-phthaldialdehyde (OPA).
ocular pulse amplitude
(142 times)
Ophthalmology
(114 times)
IOP (99 times)
DCT (55 times)
GAT (31 times)
1992 Diagnosis of cavernous sinus arteriovenous fistula by measurement of ocular pulse amplitude.
optical parametric amplifier
(91 times)
Ophthalmology
(79 times)
DFG (6 times)
MIR (6 times)
OPG (4 times)
1996 Noiseless optical amplification in quasi-phase-matched bulk lithium niobate.
opsonophagocytic activity
(84 times)
Allergy and Immunology
(56 times)
GMCs (14 times)
GMTs (12 times)
IgG (10 times)
1999 Contribution of serotype-specific IgG concentration, IgG subclasses and relative antibody avidity to opsonophagocytic activity against Streptococcus pneumoniae.
ovine pulmonary adenocarcinoma
(71 times)
Veterinary Medicine
(26 times)
JSRV (60 times)
Env (16 times)
ENTV (4 times)
2001 Retrovirus-induced ovine pulmonary adenocarcinoma, an animal model for lung cancer.
occupational physical activity
(69 times)
Occupational Medicine
(19 times)
LTPA (35 times)
CI (9 times)
CVD (7 times)
1988 10-year trends in physical activity in the eastern Finnish adult population: relationship to socioeconomic and lifestyle characteristics.
opsonophagocytic assay
(51 times)
Allergy and Immunology
(27 times)
ELISA (9 times)
GMTs (7 times)
IgG (3 times)
2000 Comparison of an opsonophagocytic assay and IgG ELISA to assess responses to pneumococcal polysaccharide and pneumococcal conjugate vaccines in children and young adults with sickle cell disease.
octadecylphosphonic acid
(28 times)
Chemistry
(9 times)
SAMs (5 times)
AFM (4 times)
ToF-SIMS (4 times)
2005 Robust self-assembled octadecylphosphonic acid monolayers on a mica substrate.
occipital place area
(26 times)
Neurology
(9 times)
PPA (23 times)
RSC (19 times)
fMRI (4 times)
2013 The occipital place area is causally and selectively involved in scene perception.
10  one-photon absorption
(25 times)
Chemistry
(19 times)
TPA (23 times)
DFT (5 times)
ZINDO (3 times)
2004 An insight into a novel class of self-assembled porphyrins: geometric structure, electronic structure, one- and two-photon absorption properties.
11  orthogonal projection approach
(19 times)
Chemistry Techniques, Analytical
(15 times)
EFA (5 times)
MCR-ALS (4 times)
ALS (2 times)
1996 Orthogonal projection approach applied to peak purity assessment.
12  opsonophagocytic killing assay
(15 times)
Allergy and Immunology
(8 times)
GMCs (3 times)
AEs (2 times)
ART (2 times)
2008 A four-parameter logistic model for estimating titers of functional multiplexed pneumococcal opsonophagocytic killing assay.
13  oropharyngeal aspiration
(13 times)
Pediatrics
(4 times)
VFSS (6 times)
MWCNTs (3 times)
BALF (2 times)
2007 Oropharyngeal aspiration and pneumonia in children.
14  overall percent agreement
(10 times)
Neoplasms
(2 times)
NPA (3 times)
PPA (3 times)
CI (2 times)
2012 Physiotherapist agreement when visually rating movement quality during lower extremity functional screening tests.
15  Opalinus Clay
(9 times)
Environmental Health
(6 times)
HM (2 times)
COx (1 time)
DOM (1 time)
2003 Diffusion of HTO, 36Cl- and 125I- in Opalinus Clay samples from Mont Terri. Effect of confining pressure.
16  optical phased array
(9 times)
Ophthalmology
(8 times)
CBC (1 time)
DEHI (1 time)
EO (1 time)
2004 Optical phased array configuration for an extremely large telescope.
17  oropharyngeal airway
(8 times)
Medicine
(2 times)
NPA (2 times)
BCLP (1 time)
BVMs (1 time)
2001 Aspiration of an oropharyngeal airway during nasotracheal intubation.
18  octaphlorethol A
(7 times)
Toxicology
(4 times)
AMPK (2 times)
GLUT4 (2 times)
alpha-MSH (1 time)
2012 Octaphlorethol A, a novel phenolic compound isolated from a brown alga, Ishige foliacea, increases glucose transporter 4-mediated glucose uptake in skeletal muscle cells.
19  oligonucleotide pool assay
(7 times)
Genetics
(3 times)
BC (1 time)
DFS (1 time)
DH (1 time)
2008 Coupling amplified DNA from flow-sorted chromosomes to high-density SNP mapping in barley.
20  occupational PA
(6 times)
Sports Medicine
(3 times)
LTPA (4 times)
PA (4 times)
TPA (2 times)
2013 Physician communication and physical activity among Latinas.
21  opsonophagocytic
(6 times)
Allergy and Immunology
(2 times)
AEs (1 time)
AOM (1 time)
CI (1 time)
2007 ELISA IgG concentrations and opsonophagocytic activity following pneumococcal protein D conjugate vaccination and relationship to efficacy against acute otitis media.
22  osteophyte area
(6 times)
Rheumatology
(5 times)
mJSW (6 times)
ROAD (6 times)
OA (5 times)
2010 Normal and threshold values of radiographic parameters for knee osteoarthritis using a computer-assisted measuring system (KOACAD): the ROAD study.
23  o-phthalic acid
(4 times)
Chemistry Techniques, Analytical
(2 times)
4-CBA (2 times)
BA (2 times)
HMA (2 times)
2009 Sample stacking for determination of aromatic acid impurities by microemulsion electrokinetic chromatography.
24  Opalescence
(4 times)
Dentistry
(4 times)
REM (3 times)
CON (1 time)
DD (1 time)
2001 Effects of 10% carbamide peroxide bleaching materials on enamel microhardness.
25  optical platelet aggregometry
(4 times)
Vascular Diseases
(2 times)
CAD (2 times)
ADP (1 time)
AIS (1 time)
2008 Monitoring aspirin therapy with the Platelet Function Analyzer-100.
26  optimized prolate ablation
(4 times)
Ophthalmology
(4 times)
OPDCAT (2 times)
HOAs (1 time)
MTF (1 time)
2005 Optimized prolate ablations with the NIDEK CXII excimer laser.
27  ovine pulmonary adenomatosis
(4 times)
Virology
(2 times)
BAC (2 times)
JSRV (2 times)
bFGF (1 time)
2004 Detection and characterization of betaretroviral sequences, related to sheep Jaagsiekte virus, in Africans from Nigeria and Cameroon.
28  oxalate-pyroantimonate
(4 times)
Histocytochemistry
(2 times)
PPA (2 times)
LAMMA (1 time)
1984 Localization of calcium in skeletal and cardiac muscle.
29  Office of Population Affairs
(3 times)
Public Health
(2 times)
DC (1 time)
FPAR (1 time)
HHS (1 time)
2014 Providing quality family planning services: Recommendations of CDC and the U.S. Office of Population Affairs.
30  oil palm ash
(3 times)
Chemistry
(1 time)
MK (1 time)
OPC (1 time)
S/S (1 time)
2008 Oil palm ash as partial replacement of cement for solidification/stabilization of nickel hydroxide sludge.
31  o-phthalaldehyde reagent
(2 times)
Biochemistry
(1 time)
DSA (1 time)
GARA (1 time)
GEN (1 time)
2008 Evaluation of the stability of gentamicin in different antibiotic carriers using a validated MEKC method.
32  o-phthalic dicarboxaldehyde
(2 times)
Chemistry Techniques, Analytical
(2 times)
3-MPA (1 time)
FAAs (1 time)
HPLC-FLD (1 time)
2000 Analysis of linear and cyclic oligomers in polyamide-6 without sample preparation by liquid chromatography using the sandwich injection method. II. Methods of detection and quantification and overall long-term performance.
33  occluded popliteal artery
(2 times)
Endocrinology
(2 times)
FV (2 times)
ICM (1 time)
IMA (1 time)
2012 Alterations of specific biomarkers of metabolic pathways in vascular tree from patients with Type 2 diabetes.
34  occlusal plane angle
(2 times)
Dentistry
(2 times)
GA (2 times)
MPA (2 times)
LAFH/TAFH (1 time)
2017 Cephalometric Improvement of Severe Microretrognathia With an Anterior Open Bite Using Curvilinear Mandibular Distraction Osteogenesis.
35  ocular photosensitivity analyzer
(2 times)
Eye Diseases
(1 time)
VPT (2 times)
CI (1 time)
ICC (1 time)
2017 New Methods for Quantification of Visual Photosensitivity Threshold and Symptoms.
36  oligodeoxynucleoside phosphoramidates
(2 times)
Biochemistry
(2 times)
OPT (1 time)
1991 Characterization of antisense DNA derivatives having stereoisomeric linkages.
37  Ontario Psychiatric Association
(2 times)
Psychiatry
(2 times)
--- 1977 Collaboration between Ohio psychiatrists and the legislature to update commitment laws.
38  optic atrophy
(2 times)
Molecular Biology
(1 time)
ERR (1 time)
Fis (1 time)
HFD (1 time)
2014 In utero exposure to prepregnancy maternal obesity and postweaning high-fat diet impair regulators of mitochondrial dynamics in rat placenta and offspring.
39  Ordinary Procrustes analysis
(2 times)
Radiography, Dental
(1 time)
ANCOVA (1 time)
CBCT (1 time)
CS (1 time)
2015 The effect of smiling on facial asymmetry in adults: a 3D evaluation.
40  organ procurement agency
(2 times)
Transplantation
(1 time)
BSA (1 time)
1987 Hospitals to receive help in organ procurement.
41  organized physical activity
(2 times)
Health Services
(1 time)
AIT (1 time)
AOR (1 time)
CI (1 time)
2014 Contribution of organized and nonorganized activity to children's motor skills and fitness.
42  organophosphate acid
(2 times)
Pharmacology
(2 times)
DFP (1 time)
OP (1 time)
1988 Organofluorophosphate-hydrolyzing activity in an estuarine clam, Rangia cuneata.
43  Organophosphorus acid
(2 times)
Microbiology
(1 time)
DFP (1 time)
1993 Comparison of organophosphorous acid anhydrolases from different species using monoclonal antibodies.
44  oropharyngeal anesthesia
(2 times)
Pulmonary Medicine
(2 times)
OAH (2 times)
CAH (1 time)
NA (1 time)
1987 Upper airway obstruction during sleep in normal subjects after selective topical oropharyngeal anesthesia.
45  out-patient appointment
(2 times)
General Surgery
(2 times)
--- 2007 A comparison of the views of patients and medical staff in relation to the process of informed consent.
46  4-oxopentanal
(1 time)
Toxicology
(1 time)
PM (1 time)
2004 Pyridoxamine: an extremely potent scavenger of 1,4-dicarbonyls.
47  7-oxa-13-prostynoic acid
(1 time)
Endocrinology
(1 time)
PPP (1 time)
1975 7-oxa-13-prostynoic acid and polyphloretin phosphate as non-specific antagonists of the stimulatory effects of different agents on adenylate cyclase from various tissues.
48  agent--Opalescence/Ultradent
(1 time)
Dentistry
(1 time)
DD (1 time)
DE (1 time)
PLA (1 time)
2001 The effect of 10% carbamide peroxide bleaching material on microhardness of sound and demineralized enamel and dentin in situ.
49  beta-(1-oxo-2-propynyl)androst-4-en-3-one
(1 time)
Biochemistry
(1 time)
beta-HPA (1 time)
1980 Study of 3 alpha, 20 beta-hydroxysteroid dehydrogenase with an enzyme-generated affinity alkylator: dual enzyme activity at a single active site.
50  di-n-octylphosphinate, and n-octylphosphonate
(1 time)
Chemistry
(1 time)
DMAP (1 time)
PPA (1 time)
TOPO (1 time)
2008 Identification of acidic phosphorus-containing ligands involved in the surface chemistry of CdSe nanoparticles prepared in tri-N-octylphosphine oxide solvents.
51  histamine-orthophthalaldehyde
(1 time)
Chemistry Techniques, Analytical
(1 time)
--- 2003 Contributions to the determination of histamine rate by measuring out the histamine-orthophthalaldehyde complex in the absorption and fluorescence.
52  l-ornithine phenylacetate
(1 time)
Gastroenterology
(1 time)
AEs (1 time)
ALF (1 time)
ALI (1 time)
2018 Safety, tolerability, and pharmacokinetics of l-ornithine phenylacetate in patients with acute liver injury/failure and hyperammonemia.
53  O-phenanthroline
(1 time)
Molecular Biology
(1 time)
DUB (1 time)
MM (1 time)
2017 Blockade of deubiquitylating enzyme Rpn11 triggers apoptosis in multiple myeloma cells and overcomes bortezomib resistance.
54  o-phthalaldehyde 3-mercaptopropionic acid
(1 time)
Chemistry, Clinical
(1 time)
FMOC (1 time)
HPLC (1 time)
IEC (1 time)
2005 Analysis of plasma amino acids by HPLC with photodiode array and fluorescence detection.
55  o-Phthalaldehyde-mercaptoethanol
(1 time)
Chemistry Techniques, Analytical
(1 time)
HPLC (1 time)
1983 Electrochemical activity of o-phthalaldehyde-mercaptoethanol derivatives of amino acids. Application to high-performance liquid chromatographic determination of amino acids in plasma and other biological materials.
56  o-phthalaldehyde/t-butylthiol
(1 time)
Brain
(1 time)
GABA (1 time)
1999 Extracellular perfusion of rat brain nuclei using microdialysis: a method for studying differential neurotransmitter release in response to neurotoxins.
57  O. pedunculosum agglutinin
(1 time)
Biochemistry
(1 time)
RACE (1 time)
2011 Purification, characterization, and molecular cloning of a novel antifungal lectin from the roots of Ophioglossum pedunculosum.
58  Obesity Policy Action
(1 time)
Metabolism
(1 time)
--- 2009 Obesity Policy Action framework and analysis grids for a comprehensive policy approach to reducing obesity.
59  observed in ACE-inhibitory activities and proteolytic
(1 time)
Nutritional Sciences
(1 time)
ACE-inhibitory (1 time)
ST (1 time)
2012 The impact of NaCl substitution with KCl on proteinase activities cell-free extract and cell-free supernatant at different pH levels and salt concentrations: Lactobacillus delbrueckii ssp. bulgaricus and Streptococcus thermophilus.
60  observer preference analysis
(1 time)
Radiology
(1 time)
VGA (1 time)
1997 Digital mammography using storage phosphor plate technique--optimizing image processing parameters for the visibility of lesions and anatomy.
61  occult placenta accreta
(1 time)
Pathology
(1 time)
BPMF (1 time)
ISIT (1 time)
2007 Occult placenta accreta: the missing link in the diagnosis of abnormal placentation.
62  occupational activity
(1 time)
Sports Medicine
(1 time)
CA (1 time)
LTPA (1 time)
2002 Twenty-five-year trends in physical activity of 30- to 59-year-old populations in eastern Finland.
63  occurs in the popliteal artery
(1 time)
Cardiology
(1 time)
OFPA (1 time)
1998 Tibioperoneal bypass for popliteal arterial occlusion.
64  octylamine-poly(acrylic acid)
(1 time)
Nanotechnology
(1 time)
QDs (1 time)
2011 The cytotoxicity of OPA-modified CdSe/ZnS core/shell quantum dots and its modulation by silibinin in human skin cells.
65  off-pathway aggregation
(1 time)
Chemistry
(1 time)
HEWL (1 time)
2017 Insoluble Off-Pathway Aggregates as Crowding Agents during Amyloid Fibril Formation.
66  Office of Patient Affairs
(1 time)
Pediatrics
(1 time)
--- 2005 Characteristics of families that complain following pediatric emergency visits.
67  Offset Pixel Apertures
(1 time)
Biophysics
(1 time)
DMP (1 time)
2018 Depth extraction with offset pixels.
68  oil particulate aggregates
(1 time)
Biology
(1 time)
ASMB (1 time)
CLB (1 time)
PAHs (1 time)
2018 Effect of evaporative weathering and oil-sediment interaction on the fate and behavior of diluted bitumen in marine environments. Part 2. The water accommodated and particle-laden hydrocarbon species and toxicity of the aqueous phase.
69  Oil Pollution Act
(1 time)
Environmental Health
(1 time)
CERCLA (1 time)
ERA (1 time)
NRDA (1 time)
2002 Quantifying natural resource injuries and ecological service reductions: challenges and opportunities.
70  Olefinic peptide nucleic acid
(1 time)
Biochemistry
(1 time)
--- 2003 Olefinic peptide nucleic acid (OPA).
71  olefinic peptide nucleic acid analogues
(1 time)
Biochemistry
(1 time)
--- 2003 Olefinic peptide nucleic acid (OPA).
72  Oligo Pool All
(1 time)
Medicine
(1 time)
EGFR (1 time)
IGFBP-3 (1 time)
SNPs (1 time)
2009 An analysis of growth, differentiation and apoptosis genes with risk of renal cancer.
73  oligo pool assay
(1 time)
Genetics
(1 time)
LD (1 time)
SNPs (1 time)
2010 Population- and genome-specific patterns of linkage disequilibrium and SNP variation in spring and winter wheat (Triticum aestivum L.).
74  oligomeric proanthocynidins
(1 time)
Medicine
(1 time)
OS (1 time)
PMs (1 time)
2011 Activity of some physiological modulators in reducing the side effects of levothyroxine in patients suffering from primary hypothyroidism.
75  oligonucleotide peak analyzer
(1 time)
Chemistry Techniques, Analytical
(1 time)
OMA (1 time)
2013 OMA and OPA--software-supported mass spectra analysis of native and modified nucleic acids.
76  oligopeptide amphiphile
(1 time)
Biotechnology
(1 time)
EDS (1 time)
SEM (1 time)
TEM (1 time)
2014 A novel self-assembled oligopeptide amphiphile for biomimetic mineralization of enamel.
77  oncofetal pancreatic antigen
(1 time)
Biochemistry
(1 time)
--- 1981 Partial characterisation of an oncofetal pancreatic antigen. Its role in the differential diagnosis and therapy of patients with pancreatic cancer.
78  one-photon absorption cross section of sigma
(1 time)
Chemistry
(1 time)
TPA (1 time)
2007 Two-photon excited fluorescence of nitrogen-vacancy centers in proton-irradiated type Ib diamond.
79  online preparatory assessment
(1 time)
Nursing
(1 time)
IBD (1 time)
2013 1+1=3? The systematic development of a theoretical and evidence-based tailored multimedia intervention to improve medication adherence.
80  opacification
(1 time)
Stomatognathic Diseases
(1 time)
CBCT (1 time)
MT (1 time)
PT (1 time)
2014 Prevalence of incidental maxillary sinus pathologies in dental patients on cone-beam computed tomographic images.
81  Opaque shade
(1 time)
Dentistry
(1 time)
ALP (1 time)
CCP (1 time)
MFB (1 time)
2018 Effect of priming agents on shear bond strengths of resin-based luting agents to a translucent zirconia material.
82  open prostatic adenectomy
(1 time)
Urology
(1 time)
BPH (1 time)
2006 An improved technique for controlling bleeding during simple retropubic prostatectomy: a randomized controlled study.
83  open proximal anastomosis
(1 time)
General Surgery
(1 time)
HCA (1 time)
LLA (1 time)
1999 [A report of 4 cases of aortic operation using open proximal anastomosis under the hypothermic circulatory arrest and left lateral exposure].
84  operational amplifier
(1 time)
Biomedical Engineering
(1 time)
CMRR (1 time)
IC (1 time)
2009 Six-channel neural signal regeneration integrated circuit.
85  ophthalmic artery
(1 time)
Anesthesiology
(1 time)
CBF (1 time)
CSFP (1 time)
ICP (1 time)
1990 [Effects of prostaglandin E1 on cerebral blood flow, cerebrospinal fluid pressure, and spinal subarachnoidal compliance].
86  OPPA-therapy
(1 time)
Pediatrics
(1 time)
--- 1988 [Significance of procarbazine in the chemotherapy of Hodgkin's disease--a report of the Cooperative Therapy Study DAL-HD-85].
87  opsonic activities
(1 time)
Allergy and Immunology
(1 time)
--- 2018 A toddler PCV booster dose following 3 infancy priming doses increases circulating serotype-specific IGG levels but does not increase protection against carriage.
88  opsonic antibody
(1 time)
Allergy and Immunology
(1 time)
HEU (1 time)
MenC (1 time)
SBA (1 time)
2016 Association of serum bactericidal antibody and opsonic antibody levels after Neisseria meningitidis serogroup C conjugate vaccine in Brazilian children and adolescents infected or not infected with HIV.
89  OptiBond All-in-one
(1 time)
Dentistry
(1 time)
AHO (1 time)
BF (1 time)
CSE (1 time)
2011 Enamel margin integrity of Class I one-bottle all-in-one adhesives-based restorations.
90  optical aggregometry
(1 time)
Vascular Diseases
(1 time)
ARF (1 time)
CVVHDF (1 time)
PGI (1 time)
2010 Heparin versus prostacyclin in continuous hemodiafiltration for acute renal failure: effects on platelet function in the systemic circulation and across the filter.
91  optical plankton analyser
(1 time)
Cell Biology
(1 time)
TOF (1 time)
1989 Optical plankton analyser: a flow cytometer for plankton analysis, II: Specifications.
92  Optical platelet aggregation
(1 time)
Laboratory Techniques and Procedures
(1 time)
AA (1 time)
NSAIDs (1 time)
PRP (1 time)
2005 A Thrombelastograph whole blood assay for clinical monitoring of NSAID-insensitive transcellular platelet activation by arachidonic acid.
93  optically
(1 time)
Laboratory Techniques and Procedures
(1 time)
NSAID (1 time)
PWA (1 time)
TEG (1 time)
2005 Comparison of modified Thrombelastograph and Plateletworks whole blood assays to optical platelet aggregation for monitoring reversal of clopidogrel inhibition in elective surgery patients.
94  optimal power allocation
(1 time)
Biosensing Techniques
(1 time)
DF (1 time)
FDR (1 time)
GP (1 time)
2016 Transmit Power Allocation for Physical Layer Security in Cooperative Multi-Hop Full-Duplex Relay Networks.
95  optimized prolate ablation algorithm
(1 time)
Ophthalmology
(1 time)
NAVEX (1 time)
2005 Optimized prolate corneal ablation: case report of the first treated eye.
96  oral protein administration
(1 time)
Medicine
(1 time)
IPA (1 time)
2011 Intraduodenal administration of intact pea protein effectively reduces food intake in both lean and obese male subjects.
97  organismal performance assay
(1 time)
Biological Evolution
(1 time)
--- 2016 Quantification of cerivastatin toxicity supports organismal performance assays as an effective tool during pharmaceutical safety assessment.
98  organizational performance assessment
(1 time)
Health Services
(1 time)
--- 1998 A review of organizational performance assessment in health care.
99  organized out of school PA
(1 time)
Sports Medicine
(1 time)
AT (1 time)
NOPA (1 time)
2010 The physical activity behaviors outside school and BMI in adolescents.
100  organized, group-based physical activity
(1 time)
Medicine
(1 time)
ALI (1 time)
BP (1 time)
CVD (1 time)
2015 Effects of Organized Physical Activity on Selected Health Indices among Women Older than 55 Years.