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Measure of an acid's strength in solution
the value of log Ka is the exponent (−5), giving pKa = 5. For acetic acid, Ka = 1.8 x 10−5, so pKa is 4.7. A lower Ka corresponds to a weaker acid (an
Acid_dissociation_constant
Topics referred to by the same term
Look up PKA or pKa in Wiktionary, the free dictionary. PKA may refer to: Napaskiak Airport (IATA code), airport in Napaskiak, Alaska Professionally known
PKA
Family of enzymes
protein kinase A (PKA) is a family of serine-threonine kinases whose activity is dependent on cellular levels of cyclic AMP (cAMP). PKA is also known as
Protein_kinase_A
protein pKa calculations are used to estimate the pKa values of amino acids as they exist within proteins. These calculations complement the pKa values
Protein_pKa_calculations
Network simulation software
Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that allows users to create network topologies and imitate modern computer
Packet_Tracer
American martial artist (born 1945)
American superstars of kickboxing, he was the Professional Karate Association (PKA) World Full-Contact Champion, and the Middleweight Kickboxing Champion for
Bill_Wallace_(martial_artist)
Atom displaced from its lattice site by an incident particle
In condensed-matter physics, a primary knock-on atom (PKA) is an atom that is displaced from its lattice site by irradiation; it is, by definition, the
PKA_(irradiation)
Kra–Dai language
Thai, or Central Thai (historically Siamese; Thai: ภาษาไทย), is a Tai language of the Kra–Dai language family spoken by the Central Thai, Mon, Lao Wiang
Thai_language
Martial arts promotion company
Professional Karate Association (PKA), later Professional Karate & Kickboxing Association, and now effective from March 1, 2022 PKA Worldwide was originally a
Professional Karate Association
Professional_Karate_Association
American kickboxer (born 1954)
Florida, Wilson lost a 5-round decision to Rudy Burney in a PKA sanctioned match. However, the PKA later overturned the decision for, "improper procedures
Don_Wilson_(kickboxer)
American actor and kickboxer
professional kickboxer. He is a former Professional Karate Association (PKA) and Professional Karate Commission (PKC) Light Welterweight World Champion
Jerry_Trimble
Aqueous solution of a weak acid and its conjugate base
value at pH = pKa ± 1, to 10% at pH = pKa ± 1.5 and to 1% at pH = pKa ± 2. For this reason the most useful range is approximately pKa ± 1. When choosing
Buffer_solution
Governing body for the sports of karate, kickboxing, and mixed martial arts (MMA)
issues that sent the Professional Karate Association (PKA) into decline. From 1974 until 1985, the PKA had been the most recognized worldwide kickboxing sanctioning
ISKA_(sports_governing_body)
American novelist
Virginian. Quine also was the president of the Professional Karate Association (PKA) whose Kick of the 80’s weekly fight series on ESPN ran for close to a decade
Don_Quine
Subdiscipline of chemistry, focusing on carbon compounds
groups have different pKa values and bond strengths (single, double, triple) leading to increased electrophilicity with lower pKa and increased nucleophile
Organic_chemistry
Statuary board of the government of Malaysia
Port Klang Authority (PKA) is a government agency of Malaysia that facilitates, regulates and owns the country's most important port, Port Klang, on the
Port_Klang_Authority
American martial artist and actor (1944–2012)
win the Professional Karate Association (PKA) Heavyweight full-contact karate title. The original 1974 PKA world champions, including Lewis (heavyweight)
Joe_Lewis_(martial_artist)
Activation of coagulation cascade
surface and reciprocal activation of FXII and PK occurs, forming FXIIa and PKa. FXIIa can initiate the coagulation cascade by cleaving and activating factor
Contact_activation_system
Property of ions and molecules
While pKa values often refer to aqueous solutions, pKa can be defined with reference to any solvent, and many weak organic acids have measured pKa values
Proton_affinity
American kickboxer (born 1959)
He rebounded from this by winning the Professional Karate Association (PKA) World Light Heavyweight title that same year before moving up to cruiserweight
Dennis_Alexio
Chemical compound
(PKA). H-89, derived from H-8 (N-[2-(methylamino)ethyl]-5-isoquinoline-sulfonamide), was initially believed to act specifically as an inhibitor of PKA
H-89
Chemical compound (OH–)
ion [HCrO4]− dissociates according to [O3CrO–H]− ⇌ [CrO4]2− + H+ with a pKa of about 5.9. The infrared spectra of compounds containing the OH functional
Hydroxide
Chemical compound
(NaOH). The buffering region is dependent upon the pKa, and is typically +/- 1.0 pH units of the pKa. The pKa of KHP is 5.4, so its pH buffering range would
Potassium_hydrogen_phthalate
Aqueous cation H3O+
define pKa of H3O+ in water, H2O has to act simultaneously as a solute and the solvent. The IUPAC has not given an official definition of pKa that would
Hydronium
Penultimate step in the activation of mammalian spermatozoa
monophosphate (cAMP) synthesis, activating a secondary pathway. Protein kinase A (PKA), which is activated by cAMP, phosphorylates actin polymerization regulators
Capacitation
whose major intracellular receptor is the cAMP-dependent protein kinase (PKA) that acts through the phosphorylation of target proteins. The signal transduction
Crosstalk_(biology)
Pair of structures in the brains of some arthropods and annelids
concentration of cAMP, which activates PKA. When dopamine, an aversive olfactory stimulant, is applied it activates PKA specifically in the vertical mushroom
Mushroom_bodies
Chemical compound
buffering agent in biology and biochemistry. It has pKa value of 6.15 at 20 °C. The pH (and pKa at ionic strength I≠0) of the buffer solution changes
MES_(buffer)
Chemical compound
corrosive. Peracetic acid is a weaker acid than the parent acetic acid, with a pKa of 8.2. Peracetic acid is produced industrially by the autoxidation of acetaldehyde:
Peracetic_acid
following weight classes: The (now defunct) Professional Karate Association (PKA) utilized the following weight classes: The ONE Championship utilizes the
Kickboxing_weight_classes
Football club
CMSS Rapatona Tigers FC, Moresby Casino Hotel and currently referred to as PKA Rapatona FC for sponsorship reasons, is a Papua New Guinean soccer club,
Rapatona_F.C.
American kickboxer
professional boxer from Memphis, Tennessee. He was a PKA World Super Heavyweight Champion, PKA World Heavyweight champion, Professional Karate Commission
Anthony_Elmore
1979 compilation album by various artists
release, the Flesh Eaters consisted solely of their founder, Chris Desjardins (pka Chris D.), backed by the members of the pioneering punk rock band the Flyboys;
Tooth and Nail (various artists album)
Tooth_and_Nail_(various_artists_album)
Mammalian protein found in Homo sapiens
stimulant of cAMP production, which leads to activation of protein kinase A. PKA functions to phosphorylate certain proteins, affecting their activity. The
Histamine_H2_receptor
Middle Indo-Aryan language of India
Developed into Eastern Hindi languages Language family Indo-European Indo-Iranian Indo-Aryan Ardhamagadhi Prakrit Language codes ISO 639-3 pka Glottolog None
Ardhamagadhi_Prakrit
Group of structurally diverse proteins
common function of binding to the regulatory subunit of protein kinase A (PKA) and confining the holoenzyme to discrete locations within the cell. At least
A-kinase-anchoring_protein
Catalysis of chemical reactions by enzymes
substantially altered pKa. This alteration of pKa is possible through the local environment of the residue.[citation needed] pKa can also be influenced
Enzyme_catalysis
Buffer solution commonly used in biological research
equation gives the pH of a solution relative to the pKa of the acid–base pair. However the pKa is dependent on ionic strength and temperature, and as
Phosphate-buffered_saline
Chemical compound
kinase A (PKA) is a group of kinases that are cAMP-dependent that primarily phosphorylate serine or threonine residues in target proteins. PKA is a tetramer
KT5720
National park in Indonesia
Papagaran Village is similar in size, with 258 families totaling 1,078 people.PKA & TNC 2000, p. 13 At the 2010 Census, Komodo Village had 1,508 inhabitants
Komodo_National_Park
Chemical compound
species (RNS). It is the conjugate acid of peroxynitrite (ONOO−). It has a pKa of approximately 6.8. It is formed in vivo from the diffusion-controlled
Peroxynitrous_acid
Chemical compound
formula [(CH3)3COK]n (abbr. KOtBu). This colourless solid is a strong base (pKa of conjugate acid is 17 in H2O), which is useful in organic synthesis. The
Potassium_tert-butoxide
American kickboxer
full contact kickboxer and actor from Rockford, Illinois. He is a former PKA World Heavyweight Champion, ISKA Full Contact Super Heavyweight World Champion
Brad_Hefton
American kickboxer, boxer and mixed martial arts fighter (born 1966)
(PKA, IKF, ISKA, FFKA and KICK), and is known for his boxing skills and powerful kicks. Roufus is the Global Director of Fighter Development for PKA Worldwide
Rick_Roufus
American martial artist
establishment of professional kickboxing in the United States. Joe Corley is CEO of PKA Worldwide. Joe Corley began studying Tang Soo Do at age 16. At 19 he earned
Joe_Corley
American kickboxer
Bill Morrison is a retired American karate and kickboxer, who was the PKA U.S. Heavyweight and Super-Heavyweight Champion from 1984 to 1985 and #1 contender
Bill_Morrison_(kickboxer)
Weak organic acid
acid is a triprotic acid, with pKa values, extrapolated to zero ionic strength, of 3.128, 4.761, and 6.396 at 25 °C. The pKa of the hydroxyl group has been
Citric_acid
Chemical compound
Pseudomonas hunanensis was found to be able to degrade TRIS buffer. Since Tris' pKa is more strongly temperature dependent, its use is not recommended in biochemical
Tris
Chemical added to show pH of a solution
states that when pH equals the pKa or pKb value of the indicator, both species are present in a 1:1 ratio. If pH is above the pKa or pKb value, the concentration
PH_indicator
American martial artist
Professional Karate Association (PKA) Middleweight U.S. Title in March 1980. McMorris challenged Don "The Dragon" Wilson for the PKA Full-Contact Middleweight
Glenn_McMorris
Protein-coding gene in the species Homo sapiens
substrates, changing their activity. Protein kinase A catalytic subunit (PKA Cα) is a member of the AGC kinase family (protein kinases A, G, and C), and
PRKACA
Metabolism involving breakdown of lipids
by PKA, it releases CGI-58 and it expedites the docking of phosphorylated lipases to the lipid droplet. CGI-58 can be further phosphorylated by PKA to
Lipolysis
American YouTuber and podcaster (born 1986)
continues to maintain an online presence as the co-host of Painkiller Already (PKA), a podcast he co-founded in 2010. As of April 2025, the FPSRussia channel
FPSRussia
Chemical compound
black powder Density 0.7 - 0.8 g/cm3 Solubility in water insoluble Acidity (pKa) 8.5 - 10.0 Except where otherwise noted, data are given for materials in
Bone_char
Chemical compound
Self-Consistent Spectrophotometric Basicity Scale in Acetonitrile to a Full Span of 28 pKa Units: Unification of Different Basicity Scales". J. Org. Chem. 70 (3): 1019–1028
1,8-Diazabicyclo(5.4.0)undec-7-ene
1,8-Diazabicyclo(5.4.0)undec-7-ene
Central nervous system stimulant
because Gs-cAMP-PKA signaling functionally inhibits RhoA's downstream activity; once intracellular cAMP sufficiently accumulates, PKA is activated and
Amphetamine
Chemical compound
a similar pH buffering compound that contains a piperazine ring. With a pKa of 7.20, MOPS is an excellent buffer for many biological systems at near-neutral
MOPS
Selected 1,10-Phenanthrolines and 2,2'-Bipyridines phen derivative pKa of conjugate acid comment/alt. name numbering scheme 1,10-phenanthroline 4.86 phen
Transition metal complexes of 1,10-phenanthroline
Transition_metal_complexes_of_1,10-phenanthroline
Chemical compound
190.5 K) Boiling point 106–8 °C (223–46 °F; 379–281 K) 750 Torr Acidity (pKa) 10.65 (conjugate acid) Hazards GHS labelling:[1] Pictograms Signal word
Cyclopentylamine
Chemical compound
(99 °F; 310 K) at 2.0 kPa Solubility in water miscible log P 1.23 Acidity (pKa) 12.69 Basicity (pKb) 1.31 Refractive index (nD) 1.3870 Thermochemistry Std
Tert-Butyl_hydroperoxide
Full-contact hybrid martial art and combat sport
prominence in September 1974, when the Professional Karate Association (PKA) held the first World Championships. Historically, kickboxing can be considered
Kickboxing
Chemical compound
non-selective phosphodiesterase inhibitor which raises intracellular cAMP, activates PKA, inhibits TNFα and leukotriene synthesis, and reduces inflammation and innate
IBMX
Effect of spatial atomic arrangement on properties of compounds
acidity of benzoic acid compared to formic acid. The table given below shows pKa values of various monosubstituted benzoic acids. When any group is present
Ortho_effect
Chemical compound
C20H12N3O7SNa Molar mass 461.381 g/mol Appearance dark red/brown powder Acidity (pKa) 6.2, 11.55 Except where otherwise noted, data are given for materials in
Eriochrome_Black_T
Chemical compound
at 20 °C and pH 7) Solubility in dichloromethane Easily soluble Acidity (pKa) 6.9 Hazards Occupational safety and health (OHS/OSH): Main hazards Irritant
Spirotetramat
Chemical compound
medium and yellow color in basic medium. Because it changes color at the pKa of a mid strength acid, it is usually used in titration of strong acids in
Methyl_orange
Chemical compound
in alcohol, pyridine, NaOH insoluble in ethyl ether log P −3.14 Acidity (pKa) 8.48 Hazards NFPA 704 (fire diamond) 2 1 0 Lethal dose or concentration
Allantoin
Fungal metabolite
is a potent inhibitor of the serine/threonine kinases protein kinase A (PKA) and protein kinase C (PKC), binding in a similar manner with that of ATP
Balanol
Organic ion with a negatively charged carbon atom
thermodynamically favorable (K > 1), the relationship pKa(BH) > pKa(AH) must hold. These values below are pKa values determined in dimethylsulfoxide (DMSO),
Carbanion
Group of biological receptors
enzyme with a coenzyme. The PKA enzyme also contains two catalytic PKS-Cα subunits, and a regulator PKA-R subunit dimer. The PKA holoenzyme is inactive under
Opioid_receptor
Organic ring compound (C4H4NH)
H4). Pyrrole is an extremely weak base for an amine, with a conjugate acid pKa of −3.8. The most thermodynamically stable pyrrolium cation (C4H6N+) is formed
Pyrrole
Organic compounds containing amine and carboxylic groups
occurs halfway between the two carboxylate pKa values: pI = 1/2(pKa1 + pKa(R)), where pKa(R) is the side chain pKa. Similar considerations apply to other
Amino_acid
Chemical data page
point - N/A RTECS number: N/A Chemical properties XLogP: -3.415 c pI: 5.97 pKa: =2.34; 9.58 Tautomers: Hydrogen bond: donor - 2 d; acceptor - 3 e Pharmacological
Glycine_(data_page)
Chemical compound
The compound has attracted interest because it (pKa = 9.58) is more basic than dimethylaminopyridine (pKa = 9.41). It is a popular base catalyst. Kaljurand
4-Pyrrolidinylpyridine
Solution of hydrogen fluoride in water
constant Ka = 6.6×10−4 (or pKa = 3.18), in contrast to corresponding solutions of the other hydrogen halides, which are strong acids (pKa < 0). However concentrated
Hydrofluoric_acid
Glycoside
ethanol soluble log P –1.35 Vapor pressure 2.3×10−12 mm Hg (25 °C) Acidity (pKa) 10.10 UV-vis (λmax) 285 nm Pharmacology ATC code D11 (WHO) Routes of administration
Arbutin
Chemical compound
50% water ethanol mixture, the acidity constant (pKa) of Barton's base is 14. In acetonitrile its pKa is 24.31. The base is prepared by the reaction of
2-tert-Butyl-1,1,3,3-tetramethylguanidine
2-tert-Butyl-1,1,3,3-tetramethylguanidine
Chemical compound
is most intensively studied. Its protonated derivative CF3C6H4NH+3 has a pKa in acetonitrile of 8.6, about 100x more acidic than aniline. The compound
4-(Trifluoromethyl)aniline
Ethyl ester of acetoacetic acid
8 °C (357.4 °F; 453.9 K) Solubility in water 2.86 g/100 ml (20 °C) Acidity (pKa) 10.68 (in H2O) 14.2 (in DMSO) Magnetic susceptibility (χ) −71.67×10−6cm3/mol
Ethyl_acetoacetate
2017 studio album by Boosie Badazz
Hatch Brian Wilcott John Wright J. Allen p.k.a. MouseOnDaTrack 3:26 2. "Real Shooter" Hatch Mykel Cook p.k.a. MykelOnTheBeat 3:56 3. "God Wants Me to
BooPac
American kickboxer and martial artist
various kickboxing organizations (NKL, WPKO, Professional Karate Association (PKA), World Kickboxing Association (WKA), AJKBA, Shin-Kakutojutsu Federation
Benny_Urquidez
Chemical compound
point 69.2 °C (156.6 °F; 342.3 K) Solubility in water Miscible Acidity (pKa) –18.6 (aqueous, est.) Hazards Occupational safety and health (OHS/OSH):
Triflidic_acid
Removal of proton(s) from a molecule in an acid-base reaction
measured by its pKa value. A low pKa value indicates that the compound is acidic and will easily give up its proton to a base. The pKa of a compound is
Deprotonation
Harley Streten p.k.a. Flume "This Girl" Jake Mason Dan West Ivan Khatchoyan (p.k.a. Cookin' on 3 Burners) "Call on Me" Starley Hope p.k.a. Starley Peter
APRA_billion_streams_list
Mammalian protein found in Homo sapiens
cAMP-dependent protein kinase (also called Protein Kinase A or PKA). Cellular effects of Gsα acting through PKA are described here. Although each GTP-bound Gsα can
Gs_alpha_subunit
Protein-coding gene in the species Homo sapiens
protein kinase A (PKA), which transduces the signal through phosphorylation of different target proteins. The inactive holoenzyme of PKA is a tetramer composed
PRKACB
Chemical compound
water Solubility in other solvents Soluble in alcohol, chloroform Acidity (pKa) 6.35 Hazards Flash point 110 °C (230 °F; 383 K) Except where otherwise noted
Tetramethylphenylenediamine
Anion, salt, functional group or ester derived from a phosphoric acid
two pKa values) the dihydrogen phosphate ion, H2PO4−, is practically the only species present. Around pH 9.8 (mid-way between the second and third pKa values)
Phosphate
Australian musical group
Daniel Young p.k.a. "Danny Current" on drums, his brother Michael Young p.k.a. "Eddy Current" on lead guitar and keyboard, Brendan Huntley p.k.a. "Brendan
Eddy_Current_Suppression_Ring
Organic compound used in sunscreen
(583–599 °F; 579–588 K) Solubility in Ethanol 13% w/w log P 1.7 Acidity (pKa) 13.3 UV-vis (λmax) 385 Except where otherwise noted, data are given for
Methoxypropylamino cyclohexenylidene ethoxyethylcyanoacetate
Methoxypropylamino_cyclohexenylidene_ethoxyethylcyanoacetate
Australian band
which consists of DJs and record producers, Ben Garden and Rob Kittler (p.k.a. RobKAY). In 2005 their remix, "Star2Fall", of Boy Meets Girl's 1988 single
Cabin_Crew
Chemical compound
Solubility in water miscible Solubility very soluble in alcohol, ether Acidity (pKa) 0.89±0.05 Conjugate base Phosphinate Structure Molecular shape pseudo-tetrahedral
Hypophosphorous_acid
Mammalian protein found in Homo sapiens
When phospholamban is phosphorylated by PKA, its ability to inhibit SERCA2 is lost. Thus, activators of PKA, such as the beta-adrenergic agonist epinephrine
Phospholamban
Chemical compound
255 °F; 393 to 397 K) Boiling point 164 °C (327 °F; 437 K) at 11 mmHg Acidity (pKa) 4.37 (amino; 20 °C, H2O) 9.82 (phenol; 20 °C, H2O) Hazards GHS labelling:
3-Aminophenol
Aqueous solution of hydrogen iodide
400 K) 1.03 bar, azeotrope Solubility in water Aqueous solution Acidity (pKa) −9.3 (HI) Hazards GHS labelling: Pictograms Signal word Danger Hazard statements
Hydroiodic_acid
Cellular second messenger
eukaryotes, cyclic AMP works by activating protein kinase A (PKA, or cAMP-dependent protein kinase). PKA is normally inactive as a tetrameric holoenzyme, consisting
Cyclic adenosine monophosphate
Cyclic_adenosine_monophosphate
Pharmaceutical drug
necessary for the drug to demonstrate glucocorticoid effects. The estimated pKa values of hydrocortisone are 12.59 and -2.8 respectively. The log P value
Topical_hydrocortisone
Chemical compound
dissociation constant, a measure of basicity) is 11.07 at 25 °C, while its pKa (acid dissociation constant, a measure of acidity) is approximately 37. Many
2,2,6,6-Tetramethylpiperidine
Buffer solution used in biochemistry
capacity in the 7–9.2 range. The conjugate acid of Tris has a pKa of 8.07 at 25 °C. The pKa declines approximately 0.03 units per degree Celsius rise in
Tris-buffered_saline
Chemical compound
Molar mass 267.285 g·mol−1 Melting point 203 °C (397 °F; 476 K) Acidity (pKa) 3.4 Hazards Occupational safety and health (OHS/OSH): Main hazards Toxic
Agaritine
PKA
PKA
PKA
PKA
Girl/Female
Latin Greek
A nymph.
Boy/Male
Hindu
The Moon, To shine, Moon light
Boy/Male
Egyptian
Creek.
Boy/Male
Finnish, Hindu, Indian, Malayalam, Marathi, Sanskrit, Telugu
Lord Vishnu; First Child
Boy/Male
Hindu
Cloud
Boy/Male
Hindu
Finishes bad things
Girl/Female
Hindu, Indian, Tamil
Flute
Girl/Female
Indian
Producing delight
Girl/Female
Hindu
You like to make your own decisions and to be the master of your domain
Surname or Lastname
English
English : from an Old English personal name composed of the elements beorht, briht ‘bright’ + sige ‘victory’.
PKA
PKA
PKA
PKA
PKA