Overview of deltamethrin residues and toxic effects in the global environment.

Pyrethroids are synthetic organic insecticides. Deltamethrin, as one of the pyrethroids, has high insecticidal activity against pests and parasites and is less toxic to mammals, and is widely used in cities and urban areas worldwide. After entering the natural environment, deltamethrin circulates between solid, liquid and gas phases and enters organisms through the food chain, posing significant health risks. Increasing evidence has shown that deltamethrin has varying degrees of toxicity to a variety of organisms. This review summarized worldwide studies of deltamethrin residues in different media and found that deltamethrin is widely detected in a range of environments (including soil, water, sediment, and air) and organisms. In addition, the metabolism of deltamethrin, including metabolites and enzymes, was discussed. This review shed the mechanism of toxicity of deltamethrin and its metabolites, including neurotoxicity, immunotoxicity, endocrine disruption toxicity, reproductive toxicity, hepatorenal toxicity. This review is aim to provide reference for the ecological security and human health risk assessment of deltamethrin.

Roxadustat ameliorates vascular calcification in CKD rats by regulating HIF-2α/HIF-1α.

Vascular calcification (VC) is a common complication of chronic kidney disease (CKD). VC is a gene-regulated process similar to osteogenic differentiation. There are still no convincing schemes to prevent and reduce the development of VC. It has been reported that hypoxia-inducing factor 1α (HIF-1α) and endothelin-1(ET-1) are related to VC. In this study, we found that the expression of ET-1 and HIF-1α was enhanced after VC, the interaction between HIF-1α and ET-1 was confirmed by CO-IP and luciferase experiments. We found that ET-1 was an upregulated differential gene of calcified vascular smooth muscle cells (VSMCs) through gene sequencing. However, hypoxia-inducing factor 2α (HIF-2α) and HIF-1α have antagonistic effects on each other. HIF-1α is a pro-inflammatory cytokine, and HIF-2α can improve inflammation and fibrosis. Roxadustat, as a selective PHD3 inhibitor, preferentially activates HIF-2α. It is still unclear whether roxadustat improves VC in CKD by regulating the expression of HIF-2α/HIF-1α. Alizarin red staining and western blot as well as immunohistochemical results showed that roxadustat could significantly reduce the degree of vascular and VSMCs calcification in CKD rats. Serum HIF-1α and ET-1 were significantly decreased after roxadustat treatment. In addition, western blot results showed that roxadustat could decrease the expression of HIF-1α and ET-1 in vascular tissues and calcified VSMC, but HIF-2α expression significantly increased. Interestingly, our study confirmed that activation of HIF-1α or inhibition of HIF-2α reversed the ameliorating effect of roxadustat on VC, proving that the effect mediated by roxadustat is HIF-2α/HIF-1α dependent. We have demonstrated for the first time that roxadustat improves VC in CKD rats by regulating HIF-2α/HIF-1α, thus providing a new idea for the application of roxadustat in VC of CKD.

[Knot-free suture and frenulum positioning combined with application positioning using a disposable circumcision suture device in circumcision].

OBJECTIVE: To explore the effect of knot-free suture and frenulum positioning combined with application positioning (KFS-FP + AP) in circumcision using a disposable circumcision suture device. METHODS: We retrospectively analyzed the clinical data on 160 cases of circumcision for phimosis or redundant prepuce by KFS-FP + AP (the observation group, n = 80) or by routine circumcision (the control group, n = 80) with a disposable circumcision suture device from February 2021 to December 2021. We recorded the operation time, incidence of frenulum breve, incidence of frenulum dislocation, and Visual Analog Scale (VAS) scores at 6 hours after surgery, and compared them between the two groups of patients. RESULTS: The operation time was longer in the observation than in the control group (8.00 ï¼»8.00, 9.00ï¼½ min vs 5.00 ï¼»5.00, 5.00ï¼½ min), and the incidence rates of frenulum breve (0 vs 8.75%, P < 0.05) and frenulum dislocation (0 vs 7.5%, P < 0.05) significantly lower in the former than in the latter group. There were no statistically significant difference in the VAS scores between the observation and the control groups (2.60 ï¼»2.00, 3.00ï¼½ vs 2.55 ï¼»2.00, 3.00ï¼½, P > 0.05). CONCLUSION: KFS-FP + AP with a disposable circumcision suture device is a safe and effective method of circumcision, with high satisfaction of the patients and worthy of clinical promotion.

[Abnormally short frenulum induced by circumcision with the disposable circumcision suture device: Causes and improvement of the surgical method].

OBJECTIVE: To investigate the causes of abnormally short frenulum induced by circumcision with disposable circumcision suture device and the improvement of the surgical method. METHODS: We retrospectively analyzed the clinical data on 320 cases of phimosis or redundant prepuce treated from January 2020 to September 2020, including 160 children (group A) and 160 adults (group B), each further divided into an observation group (n = 80, groups A1 and B1) and a control group (n = 80, groups A2 and B2). The patients in groups A1 and B1 underwent circumcision by suture positioning at the frenulum with the disposable circumcision suture device, and those in groups A2 and B2 received conventional circumcision with the disposable circumcision suture device. We compared the operation time, incidence rate of abnormally short frenulum and Visual Analogue Scale (VAS) score at 6 hours after surgery among the four groups of patients. RESULTS: Statistically significant differences were observed between groups A1 and A2 in the operation time (12.00 ï¼»11.00, 13.00ï¼½ vs 8.50 ï¼»8.50, 9.00ï¼½ min, P < 0.05) and the incidence rate of abnormally short frenulum (0 vs 10%, P < 0.05) but not in the VAS score (3.00 ï¼»3.00, 4.00ï¼½ vs 3.00 ï¼»3.00, 3.75ï¼½, P > 0.05). Statistically significant differences were also found between groups B1 and B2 in the operation time (12.00 ï¼»11.00, 12.00ï¼½ vs 6.25 ï¼»6.00, 7.00ï¼½ min, P < 0.05) and the incidence rate of abnormally short frenulum (0 vs 7.5%, P < 0.05) but not in the VAS score (2.00 ï¼»2.00, 3.00ï¼½ vs 2.00 ï¼»2.00, 3.00ï¼½, P > 0.05). CONCLUSIONS: Abnormally short frenulum induced by circumcision with the disposable circumcision suture device is mainly attributed to ligation and fixation of the prepuce with the fixation band. Circumcision with the disposable circumcision suture device by suture positioning at the frenulum is a safe and effective method worthy of clinical promotion.

[Stench Sources and Impact Analysis in Automobile Making].

Volatile organic compounds (VOCs) are an important source of industrial stench. This study was aimed at sampling and analyzing the stench source and its impact on the sensitive spot residential areas, concentrating on certain automobile manufacturing enterprise. The odor concentration and VOCs species of each vent stack, plant boundary, and sensitive spot in the enterprise were determined for November 15 and 17, 2016 via qualitative and quantitative analysis using the triangle odor bag method and gas pre-concentration system-gas chromatography-mass spectra. The results show that the odor concentrations of all vent stacks in the original equipment manufacturing plant and the engine plant were below the criterion level, those of the plant boundaries in the engine plant were below the limits, and those of the plant boundaries and sensitive spots in the original equipment manufacturing plant exceeded the allowed standards. A total of 54 VOCs species were identified, including aromatics, halogenated compounds, alkanes, alkene, cycloalkanes, ketones, esters, ethers, alcohols, sulfur compounds, and oxygen ring compounds. Halogenated compounds were the most abundant VOCs species, followed by aromatics. As a result, aromatics and halogenated compounds are the representative odorants in automobile making. 1,3-Butadiene and ethyl toluene were selected to be the typical odorants of sensitive spots according to mass concentration, detector odor threshold, and threshold dilution multiples of characteristic VOCs species in sensitive spots. The results show that the majority of characteristic VOCs species were from paint composition through the qualitative analysis based on paint used in coating shops. 1,3-Butadiene, which contributed the most to odor pollution, excluding the impact of other emission sources on sensitive spots, originates from spraying and drying processes of coating shops in the original equipment manufacturer. It is recommended that the enterprise should adopt environmentally friendly paints with low VOCs components or RTO purification equipment with higher processing efficiency to reduce the impact of stench on the sensitive residential areas from automobile making.

[Reactivity-based Anthropogenic VOCs Emission Inventory in China].

A reactivity-based anthropogenic volatile organic compounds (VOCs) emission inventory in China in 2010 was developed on the basis of ozone formation potential (OFP), using the latest VOCs emission inventory, source profiles and maximum incremental reactivity (MIR) values. The results showed that the total anthropogenic OFP was 84187.61 kt in China in 2010, of which 6882.53 kt was from alkanes, 41496.92 kt from alkenes/alkynes, 32945.32 kt from aromatic hydrocarbons, 161.45 kt from halocarbons, and 2701.40 kt from oxygenated organics. The top 10 species in terms of OFP consisted of propene, ethene, m/p-xylene, toluene, 1-butene, o-xylene, 1,2,4-trimethyl benzene, 1,3-butadiene, m-ethyl toluene and ethyl benzene, contributing 63.95% to the total OFP but only 31.84% to the mass-based emission. Industrial sources accounted for the largest (49.29%) of the total OFP, followed by transportation sources (28.31%) and agricultural sources (22.40%). The key industrial sources with high reactivity were architectural decoration industry, oil refinery industry, storage and transport, machinery equipment industry, transport equipment industry and printing. Passenger cars, motorcycles and heavy duty vehicles were the major OFP sources of transportation. The two biomass burning sources were both the key OFP sources of agriculture. Shandong, Jiangsu, Guangdong, Zhejiang and Henan were the top five provinces with contributions of 39.65% of the total OFP in China. The reactivity-based emission inventory in this study would be of great significance for the formulation of reactivity-based ozone (O3) control strategies in China.