Long-Term Stability of Light-Induced Ti3+ Defects in TiO2 Nanotubes for Amplified Photoelectrochemical Water Splitting.

This study shows that the simple approach of keeping anodic TiO2 nanotubes at 70 °C in ethanol for 1 h results in improved photoelectrochemical water splitting activity due to initiation of crystallization in the material amplified by the light-induced formation of a Ti3+ -Vo states under UV 365 nm illumination. For the first time, the light-induced Ti3+ -Vo states are generated when oxygen is present in the reaction solution and are stable when in contact with air (oxygen) for a long time (two months). We confirmed here that the amorphous or nearly amorphous structure of titania supports the survival of Ti3+ species in contact with oxygen. It is also shown that the ethanol treatment substantially improves the morphology of the titania nanotube arrays, specifically, less surface cracking and surface purification from C- and F-based contamination from the electrolyte used for anodizing.

The relationship between the symptom of fatigue and the functioning of patients with inflammatory bowel diseases after surgery.

INTRODUCTION: The occurrence of fatigue in patients suffering from inflammatory bowel diseases (IBD) is influenced by pain, frequent bowel movements, stress associated with symptoms and time of their occurrence reaction of surroundings, fear for their own health, sleep disturbances, side effects of pharmacological treatment, physical and mental exhaustion, hindered social contacts and difficulties at work. AIM: To evaluate the fatigue and the assessment of functioning of patients with IBD, who were treated surgically. MATERIAL AND METHODS: To evaluate the functioning of patients, a Polish version of the Inflammatory Bowel Disease Questionnaire was used. To evaluate the occurrence of fatigue in studied subjects, a Polish version of the Functional Assessment of Chronic Illness Therapy - Fatigue Scale was used. The activity of disease was evaluated with the use of the Crohn's Disease Activity Index for patients with Crohn's disease (CD) and the Clinical Activity Index for patients with ulcerative colitis (UC). RESULTS: Before surgery, there was no significant difference between CD and UC patients, with regard to the mean FACIT-F (28.76 for CD and 28.76 for UC, p = 0.72). Also, after surgery, there was no significant difference between CD and UC patients, with regard to the mean FACIT-F (14.8 for CD and 16.0 for UC, p = 0.71). The IBD patients who underwent surgery for CD and UC had significantly lower FACIT-F scores compared to the patients before the surgery (p = 0.001 and p = 0.0001, respectively). IBD patients who underwent surgery for CD and UC had significantly better functioning and higher IBDQ total scores compared to the patients before the surgery. CONCLUSIONS: Surgical treatment significantly reduces the fatigue symptom in patients with IBD. The severity of fatigue correlates with disease activity and functioning in the respective areas.