Corydalis saxicolaBunting total alkaloid eliminates Porphyromonas gingivalis strain 33277 internalized into macrophages by inhibition of TLR2.

Objective: This study aimed to investigate the impact of Corydalis Saxicola Bunting Total Alkaloid (CSBTA) on Porphyromonas gingivalis internalization within macrophages and explore the potential role of Toll-Like Receptor 2 (TLR2) in this process.

Methods: We established a P. gingivalis internalization model in macrophages by treating P.

Sedimentary record of polycyclic aromatic hydrocarbons and DDTs in Dianchi Lake, an urban lake in Southwest China.

Unique time trends of polycyclic aromatic hydrocarbons (PAHs) and dichlorodiphenyltrichloroethanes (DDTs) were found in a dated sediment core from Dianchi Lake (DC), an urban lake in Southwest China. The temporal trend of PAHs in DC was not only different from those in China's coastline and remote lakes of China, but also different from those in more developed countries. Identification of sources suggested that PAHs in DC originated primarily from domestic combustion of coal and biomass.

Characteristics of DDTs in fish from Lake Taihu: an indicator of continual DDTs input in China.

Four typical freshwater fish species in Lake Taihu (TH), China, were collected and analyzed for the residue levels of DDT and its metabolites DDD and DDE (sum of o,p'- and p,p'-DDT, DDD, and DDE is designated as DDTs). The DDTs concentrations ranged from 3.24 to 37.

[Parallel factor analysis as an analysis technique for the ratio of three-dimensional fluorescence peak in Taihu Lake].

The present paper proposes a new method to find the ratio of three-dimensional fluorescence peak. At first, the excitation-emission fluorescence matrix of water samples was treated with parallel factor analysis (PARAFAC) and then fluorescence peaks intensity and ratio of fluorescence peak were obtained from the parallel factor analysis model. From the parallel factor analysis model, the same fluorescence peaks of different water samples lie at the same excitation-emission wavelength and the overlap of different fluorescence peaks of the same water sample is reduced.

[Distribution, source and risk assessment of polycyclic aromatic hydrocarbons in river sediment of Cheng-Yu economic zone].

The USEPA 16 priority pollutant dominated polycyclic aromatic hydrocarbons (PAHs) in the surface river sediments of Sichuan Province and Chongqing City in southwest China were determined using GC-MS. The result showed the content of PAHs in the sediment ranged from 48.2 ng/g to 723.

[Sediment record of DDTs in sediment core from Hongfeng reservoir].

In order to reconstruct the chronology of 2,2-his (4-Chlorophenyl)-1,1,1-trichloroethane (DDT) input into the Hongfeng reservoir and assess the pollution issues, the temporal distribution of DDT in sediment core from Hongfeng reservoir was measured using GC/MS method, and the possible sources and potential risk assessment also had been identified. The DDTs (sum of p,p'- and o,p'-DDT, DDE and DDD) in sediment core were ranged from 7.6 to 23.

Screening level of PAHs in sediment core from Lake Hongfeng, Southwest China.

Using data from a 25-year retrospective of polycyclic aromatic hydrocarbons (PAHs) in sediment core from Lake Hongfeng, Southwest China, their possible sources and potential toxicologic significance were investigated. The total PAH concentrations (16 priority PAHs as proposed by the United States Environmental Protection Agency) in sediments ranged from 2936.1 to 5282.

[Temporal distribution, sources, and risk assessment of polycyclic aromatic hydrocarbons in sediment core from Miyun reservoir].

The temporal distribution of polycyclic aromatic hydrocarbons (PAHs) was measured in sediment core from Miyun reservoir, and the possible sources and the potential risk assessment also have been identified. The aim of the present work is to understand the temporal trend of PAHs in Miyun reservoir recently. The concentrations of sigma PAH16 in sediment ranged from 618.

[Combining ultrafiltration, fluorescence spectroscopy and HPSEC to characterize dissolved organic matter in surface waters].

The combination of ultrafiltration, three-dimensional excitation/emission matrix (3DEEM) fluorescence spectroscopy and high-performance size-exclusion chromatography (HPSEC) was used to characterize the molecular weight distribution properties of different fluorescence materials, further revealing the differences in the sources and components. Dissolved organic matter (DOM) from different lakes fractionated by ultrafiltration with a nominal 1,000 molecular weight cut-off regenerated cellulose membrane, then 3DEEM spectrophotometry and HPSEC were applied to investigate the characteristics of high molecular weight materials in retentate and low molecular weight materials in permeate. The result indicated that the flulvic acid-like (Ex/Em approximately equal to 260 nm/450 nm of peak A and Ex/Em approximately equal to 320 nm/439 nm of peak C) and protein-like (Ex/Em approximately equal to 275 nm/312 nm of peak B and Ex/Em approximately equal to 220 nm/308 nm of peak D) fluorophores in permeate were detected after ultrafiltration which is covered by high absorbing peak of humic-like (Ex/Em approximately equal to 360 nm/462 nm of peak E) fluorescence fluorophores in the original Shennonajia bog water, Hubei province.