Determination of leaf respiration in the light: comparison between an isotopic disequilibrium method and the Laisk method.

Quantification of leaf respiration is important for understanding plant physiology and ecosystem biogeochemical processes. Leaf respiration continues in the light (R ) but supposedly at a lower rate than in the dark (R ). However, there is no method for direct measurement of R and the available methods require nonphysiological measurement conditions.

[Quitting Attempts and Utilisation of Smoking Cessation Aids among Smokers in Germany: Results from the 2012 Epidemiological Survey of Substance Abuse].

This study presents current data on smoking cessation and usage of smoking cessation aids among smokers in a representative sample of German smokers. Data of 2012 will be compared with data of the year 2000. The sample of the 2012 Epidemiological Survey of Substance Abuse (ESA) was randomly drawn from population registers and consisted of 9 084 individuals aged 18-64 years.

[Smoking cessation in rehabilitation centres: outcome and predictors of participation].

Objective: The focus of investigation in this study were the characteristics of participants and non-participants in a modern smoking cessation programme for inpatient rehabilitation centres as well as the effects of the programme on participants' smoking behavior.

Methods: Smoking patients (N=313) from 10 Bavarian rehabilitation centres including 203 participants and 110 non-participants of a newly implemented group programme were asked about socio-demographics, smoking behaviour and willingness to change both at the beginning and at the end of their inpatient stay.

Results: Univariate analyses showed there to be no difference between participants and non-participants with regard to socio-demographics and smoking behaviour.

Smoking cessation in groups--who benefits in the long term?

The 'Rauchfrei Programm' is the most widespread cognitive behavioral group program for smoking cessation in Germany. The aim of this study was to evaluate smoking cessation in the routine care setting and to investigate whether certain characteristics predict long-term abstinence. The study is a longitudinal field study with a one group pre-post-follow-up design.

Associations between trait impulsivity and prepotent response inhibition.

This study addresses the relationship between trait impulsivity and inhibitory control, two features known to be impaired in a number of psychiatric conditions. While impulsivity is often measured using psychometric self-report questionnaires, the inhibition of inappropriate, impulsive motor responses is typically measured using experimental laboratory tasks. It remains unclear, however, whether psychometrically assessed impulsivity and experimentally operationalized inhibitory performance are related to each other.