Relationship between Classification of Fabellae and the Severity of Knee Osteoarthritis: A Relevant Study in the Chinese Population.

OBJECTIVE: To classify the fabellae and discuss the relationship between the classification of fabellae and the severity of knee osteoarthritis (KOA) in Chinese. METHODS: From February 2019 to February 2020, 136 patients were measured and classified using three-dimensional computed tomography (CT) reconstruction. According to the CT imaging characteristics, the fabellae were divided into five types: type I, a fabella on the lateral femoral condyle; type II, a fabella on the medial femoral condyle; type III, a fabella on the lateral femoral condyle and a fabella on the medial femoral condyle; type IV, two fabellae on the medial femoral condyle; and type V, two fabellae on the lateral femoral condyle. The severity of KOA was assessed on the Recht grade by magnetic resonance imaging (MRI). The data were analyzed with SPSS 24.0. RESULTS: The classification of fabellae were correlated with KOA grades (χ2  = 35.026, P < 0.05). In terms of KOA grades, grade I and grade II were occupied most by fabellar type II (32, 72.8%); type II and other types showed significant statistical difference (P < 0.05). Grade I and grade II were also mainly fabellar type IV (four, 100%). Fabellar type V's biggest component was grade III and grade IV (six, 75%). Type IV and type V showed significant statistical difference (P < 0.05). CONCLUSION: The classification of fabellae were correlated with KOA grades. The type II may mean the lower KOA grades while type V may mean the higher KOA grades.

[Synthesis and spectra of novel metal complexes of multi-nitrogen heterocyclic ligand].

Novel multi-nitrogen heterocyclic metal complexes M(HMPB)2 (M = Co, Ni) using 2-(2'-hydroxy-5'-methyl phenyl) benzotriazole (HMPB) as ligand, were synthesized by the methanol aqueous solution precipitation method for the first time. The as-prepared samples were characterized by element analysis and laser-desorption ionization time-of-flight mass spectrometry (LDI-TOF-MS). The Fourier transform infrared characteristic spectra (FTIR) and ultraviolet visible electronic absorption spectrum (UV-Vis) of the new complexes were also studied especially. The results show that the HMPB ligand coordinates with the center metal ions by nitrogen and oxygen atoms in the form of bidentate ligand, and the coordination number of the center metal ions is four in the complexes; FTIR characteristic absorption band of the complexes is located in the region of 400-2 500 cm(-1). After the complexes formation, the stretching vibration of the hydroxy group of 2-(2'-hydroxy-5'-methyl phenyl) benzotriazole, the vibration peak of C = N bond and the characteristic absorption of C-O bond showed distinct changes. The IR characteristic absorption peak positions of M-N and M-O bond were also confirmed. These complexes exhibited a strong absorption in the ultraviolet region and the maximum absorption peak located in the range of 335-345 nm.

[Spectral study of monoisothiocyanato-substituted 3:1 asymmetrical phthalocyanine zinc(II)].

Electronic absorption spectra of three monoisothiocyanato-substituted asymmetrical phthalocyanine zinc(II), 2-isothiocyanato-9,10,16,17,23,24-alkyloxyphthalocyanine zinc(II) [(RO)6 (NCS)PcZn(II)] (R = n-C4H9, n-C5H11, n-C10H21), were measured in five organic solvents. The effect and order of the substitute groups and solvents were studied by electronic absorption spectra. The changes of lamda(max) data are very small between monoamino- and monoisothiocyanato-substituted asymmetrical phthalocyanines. The order of lamda(max), data is listed here, CHCl3>CH2Cl2>toluene in non-coordination solvents; DMF>THF in O-coordination solvents. The fluorescence spectra of these complexes were measured in organic solvents at the same time. The effect and order of the substitute groups, solvents and concentrations were studied on the maximum wavelength of emission and fluorescence intensity. The lamda(em,max) data of fluorescence emission are among 690-700 nm. The order of lamda(em,max) data is listed here, DMF>THF in O-coordination solvents and almost the same in non-coordination solvents. The fluorescence intensity is very strong in DMF and THF. The order of fluorescence intensity is listed here, DMF>THF in O-coordination solvents; toluene> CH2Clz > CHCl3 in non-coordination solvents. They have special fluorescent effect and should be expected to become a photosensitizer of photodynamic therapy in future.