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333489 occurrences (No.56 in the rank) during 5 years in the PubMed. [no cache] 500 found

298) The geometric structure of molecule, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) orbitals were also determined in order to predict the structural changes and reactive sites in clavulanate potassium during degradation and compatibility studies in the solid state.

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PMID:24219797 DOI:10.3109/10837450.2013.852571

2015 Pharmaceutical development and technology

* Solid-state stability and compatibility studies of clavulanate potassium.

- The kinetic and thermodynamic parameters of degradation of clavulanate potassium in the solid state were studied by using a reversed phase high performance liquid chromatography (RP-HPLC) method. The degradation of clavulanate potassium was a first-order reaction depending on the substrate concentration at an increased relative air humidity (RH) and in dry air. The dependence ln k = f(1/T) became the ln k = (0.026 ± 166.35)-(2702.82 ± 1779.43)(1/T) in dry air and ln k = (1.65 ± 100.40) × 10(3)-(5748.81 ± 3659.67)(1/T) at 76.4% RH. The thermodynamic parameters Ea, ΔH(≠a), ΔS(≠a) of the degradation of clavulanate potassium in the solid state were calculated. The dependence ln k = f (RH%) assumed the form ln k = (8.78 ± 5.75) 10 (-2) (RH%) + (2.64 × 10(-8 )± 40.41). The compatibility of clavulanate potassium with commonly used excipients was studied at an increased temperature and in dry air. The geometric structure of molecule, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) orbitals were also determined in order to predict the structural changes and reactive sites in clavulanate potassium during degradation and compatibility studies in the solid state. The ultraviolet (UV), Fourier transform infrared spectroscopy (FT-IR) and Raman spectra of degraded samples of the compound were analyzed.

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(1)52 mechanisms	(19)5 docking	(37)3 recognition	(55)2 heparin
(2)26 weight	(20)5 information	(38)3 serotyping	(56)2 identification
(3)18 data	(21)5 methods	(39)3 sieve	(57)2 knowledge
(4)18 mechanism	(22)5 modeling	(40)3 structure	(58)2 mass
(5)16 dynamics	(23)5 phylogenetic	(41)3 techniques	(59)2 mechanisms,
(6)15 and	(24)5 targets	(42)3 variance	(60)2 or
(7)10 analysis	(25)4 diagnosis	(43)2 Dynamics	(61)2 oxygen
(8)10 basis	(26)4 interactions	(44)2 approach	(62)2 perspectives
(9)8 characterization	(27)4 level	(45)2 biological	(63)2 phenotypic
(10)7 epidemiology	(28)4 level,	(46)2 classification	(64)2 phylogenies
(11)7 genetic	(29)4 responses	(47)2 clock	(65)2 probes
(12)7 imaging	(30)4 target	(48)2 dating	(66)2 profiles
(13)6 biology	(31)3 evolution	(49)2 details	(67)2 subtype
(14)6 changes	(32)3 features	(50)2 diffusion	(68)2 therapies
(15)6 markers	(33)3 levels	(51)2 effects	(69)2 underpinnings
(16)6 pathways	(34)3 marker	(52)2 events
(17)5 analyses	(35)3 medicine	(53)2 evidence
(18)5 characteristics	(36)3 orbital	(54)2 genetics

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--- WordNet output for molecular --- =>分子の Overview of adj molecular The adj molecular has 2 senses (first 1 from tagged texts) 1. (6) molecular -- (relating to or produced by or consisting of molecules; "molecular structure"; "molecular oxygen"; "molecular weight is the sum of all the atoms in a molecule") 2. molecular -- (relating to simple or elementary organization; "proceed by more and more detailed analysis to the molecular facts of perception"--G.A. Miller) --- WordNet end ---