New Insights into Leaf Physiological Responses to Ozone for Use in Crop Modelling.

Estimating food production under future air pollution and climate conditions in scenario analysis depends on accurately modelling ozone (O₃) effects on yield. This study tests several assumptions that form part of published approaches for modelling O₃ effects on photosynthesis and leaf duration against experimental data. In 2015 and 2016, two wheat cultivars were exposed in eight hemispherical glasshouses to O₃ ranging from 22 to 57 ppb (24 h mean), with profiles ranging from raised background to high peak treatments.

Homocysteine as a risk factor for cognitive impairment in stroke patients.

Background: Elevated total homocysteine (tHcy) levels are associated with an increased risk of cerebrovascular disease. It is uncertain whether tHcy is also an independent risk factor for cognitive impairment.

Methods: We examined 95 stroke subjects 3 months after their strokes, and 55 healthy comparison subjects, with a detailed neuropsychological assessment, and MRI brain scans in a proportion (n = 97).

[The merits of comprehensive therapy for acute stroke].

Objective: To evaluate the advantages of comprehensive therapy for acute stroke in a stroke unit.

Methods: The data of 207 acute stroke patients treated in a stroke unit in Australia (group A) were compared with those of 326 acute stroke patients treated in our neurological ward (group B). They were diagnosed by CT or MRI and found to have hemiplegia in 48 hours.