The study of antecedent clinical manifestations of hypertensive heart disease in cohort of hypertension.

Hypertensive heart disease presents increasing morbidity and mortality worldwide, however, the data about its epidemics and its specific symptoms in hypertension patients is scarce. To assess the frequency and correlated symptoms of hypertensive heart disease, 800 hypertension patients were randomly recruited for this study per the guidelines of the American College of Cardiology. The diagnosis of heart disease and its typical symptoms (palpitation and angina) were analyzed for the frequency of hypertensive heart disease in hypertension cohort. Cross-tabulation analysis was used to study the correlation between psychiatric indexes (annoy, amnesia, irritableness, depression, anxiety, and fear) and palpitation, the correlation between physical disorders (backache, lumbar debility, and numbness of limbs) and palpitation, and the correlation between symptoms (dizziness, daze, headache, and tinnitus) and palpitation presented in hypertensive patients. It was found that around half of patients suffered hypertensive heart disease, which correlated to certain physical and mental symptoms. Significant correlation exists between palpitation and annoy / amnesia. Significant correlation exists between palpitation and backache / lumbar debility / numbness of limbs; and significant correlation exists between palpitation and dizziness / daze / headache / tinnitus. These results provide clinical insights into the modifiable antecedent clinical conditions which are risk factors for hypertensive heart disease in elderly and will help improve early management of this disease.

Effects of in situ nitrogen removal on degradation/stabilization of MSW in bioreactor landfill.

The effects of in situ nitrogen removal on degradation of municipal solid waste (MSW) in bioreactor landfill system were investigated. The in situ nitrogen removal bioreactor landfill (NBL) consisted of fresh-refuse filled, methanogenic and nitrifying reactors was operated. The two-phase bioreactor landfill (BL) comprised of fresh-refuse filled and methanogenic reactors was used as control. The methanogenic and nitrifying reactors were all loaded with aged refuse whose placement time was 6-7 yr. Furthermore, the nitrifying reactor was in situ aerated. The results showed that the degradation of fresh-refuse was delayed and CH4 production also was reduced in the in situ nitrogen removal bioreactor landfill. It was feasible to perform in situ ammonia nitrification in aged refuse. Moreover, the efficiency of oxygen utility was high during the in situ nitrification because of the porous characteristic of aged refuse. Supplementing only 8.5mg O2 mg(-1)Nd(-1) to aged refuse could make ammonia removed completely. However, aeration did not accelerate the further stabilization of aged refuse.