Clinical analysis of pipeline dredging agent poisoning: A case report.

BACKGROUND: Pipeline dredging agents are new household deep cleaning products used to dredge blockages in kitchen and bathroom pipeline caused by grease, hair, vegetable residue, paper cotton fibre, and other organic substances. Pipeline dredging agents are corrosive chemicals that can cause poisoning through corrosive damage to the digestive tract; however, this has not been reported clinically. Therefore, this report emphasises that oral pipeline dredging agent poisoning can cause corrosive damage to the digestive tract and may have serious health consequences. CASE SUMMARY: A 68-year-old man consumed liquor (200 mL) at approximately 13:00 on April 22, 2021. At approximately 16:00, his family found him unresponsive with blackened lips, blood spots in the corners of the mouth, and blood stains on the ground, as well as an empty bottle of a pipeline dredging agent. One hour later, he was admitted to the emergency department of a local hospital. Considering the empty bottle, he was suspected to have sustained severe corrosive damage to the digestive tract and was transferred to our department at 23:15 on April 22, 2021. He developed dysphagia and intermittent fever and experienced difficulty in opening his mouth throughout his hospital stay. The patient's condition gradually stabilised. However, he suddenly developed respiratory failure on day 12, and endotracheal intubation and ventilator-assisted ventilation were performed. However, the patient died after 1.5 h despite emergency rescue efforts. CONCLUSION: Pipeline dredging agents are highly corrosive and may cause corrosive damage to the digestive tract and asphyxia upon consumption.

[Quantitatively evaluate the effects of precipitation and vegetation variation to flood under the condition of single rainstorm: A case study of Pengchongjian small watershed, Jiangxi, China]. / 场次暴雨条件下降雨和植被变化对洪水影响的定量评估­­ä»¥å½­å†²æ¶§å°æµåŸŸä¸ºä¾‹.

Precipitation and vegetation are two key factors affecting floods in the watershed. Quantitative evaluating their contribution to flood is of great scientific significance to vegetation construction and water resources management. Based on the geographic information data and hydrometeorological data from 1983 to 2014, we analyzed the characteristics of rainstorm and flood in Pengchongjian small watershed in red soil region of South China by Mann-Kendall test method, cumulative anomaly method and HEC-HMS model, and quantitatively evaluated the contribution rate of precipitation and vegetation variation to flood. The results showed that the rainstorm volume and total flood volume in Pengchongjian small watershed from 1983 to 2014 showed a non-significant upward/downward trend, respectively. HEC-HMS model had good simulation effect on single rainstorm flood, with the evaluation results being within the error range. The contribution rates of precipitation and vegetation variation of different rainstorm floods were different with respect to the total flood volume or to the peak flow. The average contribution rate of precipitation and vegetation variation to the total flood volume was 66.5% and 33.5%, while to the peak flow was 58.9% and 41.1%, respectively. Our results could provide scientific basis for flood evaluation, vegetation construction and comprehensive control of soil erosion in small watershed.

A liquid-phase approach to functionalized Janus dendrimers: novel soluble supports for organic synthesis.

A new kind of functionalized Janus dendrimer has been synthesized via a liquid-phase approach, which could easily be purified using a simple precipitation method without the need for chromatographic separation. Their use for liquid-phase organic synthesis has been achieved in the Pd-catalyzed Suzuki coupling reactions, giving biaryl products in excellent yields after cleavage.

[Study on the acryl amide intake in the Beijing diet].

OBJECTIVE: A 24-hours recall study was performed to get the acryl amide intake in the Beijing diet. METHODS: 24 separate items bought in the Beijing Market were analyzed and 2460 diet lists (820 participants x 3 days) were calculated. RESULTS: The following mean intakes of acryl amide have been estimated (microg/dm): males 18.6, females 16.6. For the 97.5 percentile of the population the intake is estimated to: males 59.0, females 50.4. As dose calculated per kg bodyweight the mean intake becomes [microg/(kg bw x d)]: males 0.282, females 0.284. For the 97.5 percentile [microg/ (kg bw x d)]: males 0.898, females 1.007. The contribution of the different meals and to the intake was as follows: breakfast 20.48%, lunch 38.99%, dinner 39.42%, snacks 1.17%. CONCLUSION: The survey leads to the conclusion that lunch and dinner are significant sources of acryl amide in a typical Beijing diet even if they have relatively low levels of acryl amide. Chinese traditional breakfast food is also an important source of acryl amide in a typical Beijing.

[Analysis on Clenbuterol pollution in swine products in Beijing, 2002].

OBJECTIVE: To explore the status of clenbuterol pollution in swine products in Beijing city in 2002. METHODS: European Union method (EUR 15127-EN Cy2.3) was adopted to examine the samples. Samples were screened by enzyme-linked immunosorbent assay (ELISA) and confirmed by GC-MS. Detected limit of the method was 0.5 micro g/kg. Samples, including lung, liver, pork, kidney and urine of swine, were collected from slaughterhouses, refrigeratories and markets in 11 districts of Beijing. RESULTS: The results indicated that 185 out of 1 379 samples were positive with an annual positive rate of 13.4%. The highest was 15.7% in lung of swine, followed by urine 15.2% and pork liver 14.0%. CONCLUSION: Rates of detection had decreased from 30.0% to 2.7% during 2002.