[Investigation and Research on Peripheral Hemoglobin and Serum Ferritin Levels of Regular Voluntary Donors with Large Number Donation].

Objective: To investigate and study the serum ferritin and hemoglobin levels of regular voluntary donors with large number donation.

Methods: 165 regular voluntary donors with large number donation in our region from January 2013 to January 2018 were enrolled as observation group, and their peripheral RBC, HCT and Hb levels were detected by automatic blood analyzer, SI and SF levels were detected by automatic chemistry analyzer. 155 healthy persons with nodonation were enrolled as control group, and their peripheral RBC, HCT, Hb, SI and SF levels were estimated and were compared with observe group.

[Periphyton and its application in water purification].

Periphyton widely exists in natural water bodies, with the characteristics of huge biomass generation, strong ecological function, and sensitive response to water quality. It removes the pollutants in water bodies mainly through the processes of absorption, metabolism, adsorption, and complexation, etc. Owing to its high tolerance against pollution and high removal efficiency for nitrogen and phosphorus, as well as the feasibility of recycling its cells at low cost, periphyton is a promising candidate for developing the treatment techniques of water purification.

In situ nitrogen removal in phase-separate bioreactor landfill.

The feasibility of in situ nitrogen removal in phase-separate bioreactor landfill was investigated. In the experiment, two sets of bioreactor landfill systems, namely conventional two-phase and in situ nitrogen removal bioreactor landfills, were operated. The in situ nitrogen removal bioreactor landfill (NBL) was comprised of a fresh-refuse filled reactor (NBLF), a methanogenic reactor (NBLM) and a nitrifying reactor (NBLN), while the two-phase bioreactor landfill (BL) used as control was comprised of a fresh-refuse filled reactor (BLF) and a methanogenic reactor (BLM).

[Method of loss of life expectancy to quantitate and compare the health risk caused by carcinogen and non-carcinogen pollutants].

Loss of life expectancy (LLE) was used to evaluate and quantitate the health risk caused by carcinogen and non-carcinogen pollutants, and was proposed as a new method to compare the environmental health risk of different pollutants. The environmental health risks exposed by 6 major environmental pollutants in China, i.e.

[Performance of leachate nitrogen removal in bioreactor landfill system].

Utilizing the unique vertical aerobic-anoxic-anerobic ecological enviornment of landfills and adopting intermittent aeration at the top of landfilled refuse, this paper studied the performance of leachate nitrogen removal in the bioreactor landfill system. The results showed that intermittent aeration at the top of landfilled refuse could stimulate the growth of nitrifying and denitrifying bacteria. The population of denitrifying bacteria was 4 to approximately 13 orders of magnitude higher than that in conventional landfilled waste layers, and the maximal value of nitrifying bacteria population reached 10(9) cells g(-1).

Effects of metsulfuron-methyl on the microbial population and enzyme activities in wheat rhizosphere soil.

The effects of metsulfuron-methyl, a sulfonylurea herbicide, on the wheat soil microorganisms were evaluated by the methods of microbial inoculation culture, and the activities of three enzymes were measured using the colorimetric method. The tolerant microorganisms that can resist 500 microg x g(-1) metsulfuron-methyl in the counting culture medium were studied specially. Metsulfuron-methyl distinctly inhibited the common aerobic heterotriphic bacteria, but the effects on common fungi and common actinomycete were not evident.

Flow cytometric analysis of fine particles in a eutrophic lake.

Fine particles play an important role, not only in aquatic biogeochemical processing but also in the distribution, transfer and transformation of pollutants in the aquatic environment. Flow cytometry, widely used in biomedical research, allows fast counting and optical analysis of individual particles. Organic autotrophic particles contain naturally fluorescing pigments, such as chlorophyll and phycoerythrin.

[Detection of organic autotrophic particles by FCM (flow cytometry) in an oligotrophic lake].

Organic autotrophic particles were detected by flow cytometry (FCM) in an oligotrophic lake. Utilizing scattering signals and fluorescence of their natural pigments, different populations could be rapidly discriminated and enumerated. We found that they belonged to three populations.

Potential loss of phosphorus from a rice field in Taihu Lake basin.

Nonpoint-source pollution by phosphorus (P) poses a threat to waters in the Taihu Lake basin in China. The potential transfer of P in rice (Oryza sativa L.) fields through surface drainage and subsurface flow was investigated under simulated conventional irrigation-drainage management.

Of pH and Eh on release of nitrogen and phosphorus from sediments of West Lake.

The effects of pH and Eh on release of nitrogen and phosphorus from sediments of West Lake under different conditions were investigated by simulation test. Results showed that the net flux of NH4(+) -N release from sediments increased with pH, but NO3(-) -N showed negative-going release at all tested pH levels. The net flux of NH4(+) -N release from sediments was higher under anaerobic or aerobic condition of the overlying water, but only under aerobic condition would net release of NO3(-) -N occur.