[Retrospective Observational Study on Chemical Coping].

Chemical coping also has an idea that it is an early stage of abuse and dependence of opioids, it is important to grasp the frequency, complaints, and risk factors of chemical coping. In this study, observational research was performed backwardly with 549 people using opioids who were newly requested to the palliative care team. Results revealed that 13 of 549 patients (2.4%)were diagnosed with chemical coping. In terms of a breakdown of the complaint, and it was following rate and reasons, 6 people(46%)felt easy, 2 people(15%)were anxious, 2 people(15%)could sleep, 2 people(15%)had unknown reasons, and 1(8%)was calm. Characteristics of each patient diagnosed with chemical coping included frequent psychiatric symptoms such as life expectancy of 3 months, opioid oral administration period of 1 year or more, disease incidence period of 1 year or more, anxiety, delirium, and depression. One benign disease also confirmed the transition to opioid dependence.

Macromolecular helicity induction on a poly(phenylacetylene) with C2-symmetric chiral [60]fullerene-bisadducts.

Three chiral N-methylfulleropyrrolidine bisadducts were prepared, isolated, and completely resolved into each enantiomer using a chiral HPLC column, which were then converted to the corresponding optically active, cationic C(60)-bisadducts to investigate if they could act as a macromolecular helicity inducer in a poly(phenylacetylene) bearing an anionic monoethyl phosphonate pendant (poly-1) in aqueous solution. Upon complexation with the chiral C(60)-bisadducts, only the trans-3 bisadduct exhibited the characteristic induced circular dichroism (ICD) in the UV-visible region of the polymer backbone in dimethyl sulfoxide-water mixtures due to the predominantly one-handed helix formation of poly-1, while the trans-2 and cis-3 bisadducts induced almost no apparent CD in the same region. These results indicate that the helicity induction on poly-1 is highly sensitive to the structure and geometry of the cationic C(60)-bisadducts with a different distance between the separated charges.