College of Chemistry and Chemical Engineering , Liaocheng University, Liaocheng , Shandong 252059 , China.
Published: July 2019
AI Article Synopsis
Article Abstract
Various functional secondary and tertiary phosphines, or their derivatives, containing stationary chiral phosphorus and flexible chiral axis were prepared, which could be further modified to afford diversely chelating ligands. The flexible axial chirality was fixed by stereogenic phosphorus via a cyclic linkage of chemical bonds or coordination with a metallic ion.
This work provides a mathematical derivation of a quasi-stationary (QS) model for multimode parametric down-conversion (PDC), which was presented in Gatti . (Gatti ., .
Department of Physical Therapy for Neurology and Neurosurgery, Faculty for Physical Therapy, Cairo University, 12612, Egypt; Department of Physical Therapy and Health Rehabilitation, College of Applied Medical Sciences, Jouf University, Al-Qurayyat, Saudi Arabia.
Background: Cognitive dysfunction is prevalent but inadequately treated in people with multiple sclerosis (PwMS). Central vestibular functions are associated with multiple cognitive domains in PwMS, even when controlling for disability status. To our knowledge, the effectiveness of vestibular training on cognition in PwMS has never been explored.
I. U. CINQUIMA, Analytical Chemistry Group (TESEA), Dept. Analytical Chemistry, Faculty of Sciences, University of Valladolid 47011, Valladolid, Spain. Electronic address:
The simultaneous separation of the enantiomers of six anticoagulant rodenticides, derived from 4-hydroxycoumarin, has been studied in this work. Ten different stationary phases (zwitterionic, Pirkle-type, polysaccharides and macrocyclic antibiotics derivatives) were evaluated by using supercritical fluid chromatography coupled to two different detectors (circular dichroism and mass spectrometry-single quadrupole). The effect of the type of organic modifier and temperature on the chiral separation was investigated, and the best results were obtained with the column Regis S,S-Whelk-O1 at 25 °C when using a gradient elution program with methanol as organic modifier.
N-(3-hydroxyacyl)glycines are compounds of remarkable interest due to their biogenic origin and bioactivity and as precursors of the corresponding 3-acyloxy derivatives which represent an important class of bioactive products of bacterial origin. Commendamide [N-(3-hydroxypalmitoyl)glycine] (1) is a gut microbiota-derived bioactive metabolite that is structurally like endogenous long-chain N-acyl-amino acids belonging to the endocannabinoidome, a complex lipid signaling system involved in several aspects of mammalian physiology and pathology. Thanks to this structural similarity, this compound and its analogues, like the N-(3-hydroxymyristoyl)glycine 2, exert a remarkable bioactivity in mammals, for instance, through activation of G-protein-coupled receptors (GPCRs).
Thermal comfort is a subjective perception, hence conventional evaluation using meteorological factors faces a technical challenge in precise assessment. Human beings have the nature to differentiate expressions of facial emotions when varied thermal environments are perceived. Facial expression scores can be taken as a predictor of perceived thermal comfort which can be precisely assessed using deep learning against physical factors.
