Radical nephrectomy combined with removal of tumor thrombus from inferior vena cava under real-time monitoring with transesophageal echocardiography: A case report.

Rationale: Renal carcinoma is a common malignant tumor of the urinary system, 4%-10% of which are complicated with tumor thrombi in the renal vein and the inferior vena cava; in about 1% of patients, the inferior vena cava tumor thrombus invades the right atrium. Surgery is the treatment of choice. Real-time monitoring with transesophageal echocardiography (TEE) has been widely used in various operations, including cardiac and non-cardiac operations for congenital heart diseases, coronary diseases, vascular heart diseases, and aorta diseases, etc.

Enhanced selectivity of methane production for photocatalytic reduction by the piezoelectric effect.

Under simultaneous full arc light and ultrasonic irradiation, photo-generated electrons are brought together by piezoelectric potential, and thus dense electrons induce the reduction of carbon dioxide on the surface of piezoelectric semiconductors, resulting in an improved selectivity of methane production to a greater degree.

[A study on the effect of Oncomelania hupensis hupensiss killed with niclosamide in China].

Objective: To study the effect of Oncomelania hupensis hupensis of niclosamide, and exploring the main influencing factors.

Methods: The samples of Oncomelania hupensis hupensis were collected from 37 sampling sites in 33 counties of 10 provinces by means of stratified random sampling methods in accordance with the categories of Oncomelania hupensis hupensis habitats. Samples were randomly located into study group and control group.

[Knowledge and practice regarding tuberculosis among final-year medical students in Hunan, China].

Objective: To ascertain the level of knowledge, skills and ability about tuberculosis among final-year medical students in Hunan province of China.

Methods: The final-year medical students from 3 medical schools were asked to complete a pre-tested questionnaire by random sampling. The questionnaire consisted of 12 and 6 multiple-choice questions assessing knowledge and practices about tuberculosis, respectively.