Prediction of ischemic stroke in elderly hypertensive patients using carotid plaque superb microvascular imaging characteristics: a lasso-logistic regression model.

Purpose: This study aims to assess the effectiveness of Superb Microvascular Imaging (SMI) in evaluating intraplaque neovascularization (IPN) in carotid plaques and its association with ischemic stroke in elderly hypertensive patients, and to develop and validate a prediction model for ischemic stroke based on SMI characteristics.

Methods: This retrospective study included 314 elderly hypertensive patients with carotid plaques, divided into a training cohort (235 cases) and a validation cohort (79 cases). Patients were categorized into stroke and non-stroke groups.

[Spectra and structural analysis of high boiling solvent lignin from Bagasse].

Bagasse high boiling solvent lignin is a polymer prepared by high boiling solvent pulping process. In the IR spectra, the absorbance of HBS lignin at 1700 and 1 328 cm(-1) is present. It is showed that the nonconjugated carbonyl existed.