Propylene Production via Oxidative Dehydrogenation of Propane with Carbon Dioxide over Composite MO-TiO Catalysts.

The CO-assisted oxidative dehydrogenation of propane (ODP) was investigated over titania based composite metal oxides, 10% MO-TiO (M: Zr, Ce, Ca, Cr, Ga). It was found that the surface basicity of composite metal oxides was significantly higher than that of bare TiO and varied in a manner which depended strongly on the nature of the MO modifier. The addition of metal oxides on the TiO surface resulted in a significant improvement of catalytic performance induced by a synergetic interaction between MO and TiO support.

Mental health and conspirasism in health care professionals during the spring 2020 COVID-19 lockdown in Greece.

Introduction: The aim of the study was to investigate mental health and conspiracy theory beliefs concerning COVID-19 among health care professionals (HCPs).

Material And Methods: During lockdown, an online questionnaire gathered data from 507 HCPs (432 females aged 33.86 ± 8.

Prognostic Biomarkers in Early-stage Gastric Adenocarcinoma Treated With Adjuvant Chemoradiotherapy.

Background/aim: Early-stage gastric cancer has a high risk of recurrence, despite trimodality therapy with surgery, chemotherapy and radiation. To improve patient selection for adjuvant chemoradiotherapy, we evaluated the prognostic significance of immunohistochemical and genetic biomarkers in patients with resected gastric adenocarcinoma.

Patients And Methods: Tumors from 119 patients were subjected to immunohistochemistry for 12 protein biomarkers, as well as next-generation sequencing.

Exercice-induced bronchoconstriction among athletes: Assessment of bronchial provocation tests.

Diagnosis of exercise-induced bronchoconstriction (EIB) requires the use of bronchial provocation tests (BPTs). We assessed exercise-induced respiratory symptoms (EIRS), EIB and asthma in athletes and evaluated the validity of BPTs in the diagnosis of EIB. Rhinitis and atopy were also assessed.

Lab-on-a-Membrane Foldable Devices for Duplex Drop-Volume Electrochemical Biosensing Using Quantum Dot Tags.

This work describes a new type of integrated lab-on-a-membrane foldable device suitable for on-site duplex electrochemical biosensing using drop-size sample volumes. The devices are fabricated entirely by screen-printing on a nylon membrane and feature two assay zones which are located symmetrically on either side of a three-electrode voltammetric cell with a bismuth citrate-loaded graphite working electrode. After the completion of two spatially separated drop-volume competitive immunoassays on the assay zones using biotinylated antibodies labeled with streptavidin-conjugated Pb- and Cd-based quantum dots (QDs), respectively, the QD labels are dissolved releasing Pb(II) and Cd(II) in the assay zones.

Clinical significance of smoking cessation in subjects with cancer: a 30-year review.

Background: Despite the established causal relationship between tobacco smoking and cancer, many cancer patients continue to smoke after diagnosis. This partly reflects ignorance of the beneficial effects of smoking cessation, even after diagnosis. The aim of this study was to demonstrate the effects of continuing or quitting smoking in patients with diagnosed cancer.

Smoking cessation effectiveness in smokers with COPD and asthma under real life conditions.

Introduction: Although smoking cessation is strongly indicated by international guidelines as an effective therapeutic tool for patients with COPD and Asthma, a large proportion of them do not quit smoking and they are regarded as a "difficult" target group.

Aim: To study the effectiveness of an intensive smoking cessation program in smokers with COPD and asthma under real-life conditions.

Methods: 166 smokers with COPD, 120 smokers with asthma and 1854 control smokers attended the smoking cessation program in the out-patient patient Smoking Cessation Clinic of the Pulmonary Department in Athens University.

Headspace microextraction: recent bioanalytical applications and issues.

Headspace microextraction has already been established as the method of choice for analyzing volatiles blended in complex matrices, such as environmental, food and biological samples. The modern trend of analytical chemistry for 'going small' has led to the successful development of various sorbing materials and microextraction techniques. As it is anticipated, microextraction is usually combined with powerful separation and optical techniques permitting enhanced recoveries of analytes, selectivity and sensitivity.

Electrocatalysis of sulphide with a cellulose acetate film bearing 2,6-dichlorophenolindophenol. Application to sewage using a fully automated flow injection manifold.

The application of an electrochemical sensor, based on a glassy carbon electrode, modified with a cellulose acetate polymeric film bearing 2,6-dichlorophenolindophenol (CA/DCPI-CME), for flow injection analysis of sulphide, is described. The overall reaction was found to obey a catalytic regeneration mechanism (EC mechanism) and the electrochemical rate constant k(f) for the electrocatalytic oxidation of sulphide was evaluated. The modified electrodes were mounted in a flow-injection manifold, poised at +0.

Improved weight management using genetic information to personalize a calorie controlled diet.

Background: Gene-environment studies demonstrate variability in nutrient requirements depending upon individual variations in genes affecting nutrient metabolism and transport. This study investigated whether the inclusion of genetic information to personalize a patient's diet (nutrigenetics) could improve long term weight management.

Methods: Patients with a history of failures at weight loss were offered a nutrigenetic test screening 24 variants in 19 genes involved in metabolism.

The bone marrow functionally contributes to liver fibrosis.

Background & Aims: Bone marrow (BM) cells may transdifferentiate into or fuse with organ parenchymal cells. BM therapy shows promise in murine models of cirrhosis, and clinical trials of bone marrow stem cell therapy for organ healing are underway. However, the BM may contribute to scar-forming myofibroblasts in various organs including the liver.