Study of diclofenac removal by the application of combined zero-valent iron and calcium peroxide nanoparticles in groundwater

Diclofenac(DCF)is one of the most frequently detected pharmaceuticals in groundwater,posing a great threat to the environment and human health due to its toxicity.To mitigate the DCF contamination,experiments on DCF degradation by the combined process of zero-valent iron nanoparticles(nZVI)and nano calcium peroxide(nCaO_(2))were performed.A batch experiment was conducted to examine the influence of the adding dosages of both nZVI and nCaO_(2)nanoparticles and pH value on the DCF removal.In the meantime,the continuous-flow experiment was done to explore the sustainability of the DCF degradation by jointly adding nZVI/nCaO_(2)nanoparticles in the reaction system.The results show that the nZVI/nCaO_(2)can effectively remove the DCF in the batch test with only 0.05 g/L nZVI and 0.2 g/L nCaO_(2)added,resulting in a removal rate of greater than 90%in a 2-hour reaction with an initial pH of 5.The degradation rate of DCF was positively correlated with the dosage of nCaO_(2),and negatively correlated with both nZVI dosage and the initial pH value.The order of significance of the three factors is identified as pH value>nZVI dosage>nCaO_(2)dosage.In the continuous-flow reaction system,the DCF removal rates remained above 75%within 150 minutes at the pH of 5,with the applied dosages of 0.5 g/L for nZVI and 1.0 g/L for nCaO_(2).These results provide a theoretical basis for the nZVI/nCaO_(2)application to remove DCF in groundwater.

Anxiety symptoms in patients with Mayer-Rokitansky-Küster-Hauser syndrome:a cross-sectional study

Background:As a congenital malformation that results in infertility and an inability to have vaginal intercourse,Mayer-Rokitansky-Küster-Hauser(MRKH)syndrome places a considerable psychological burden on patients,which results in anxiety symptoms.However,only single case studies or a few small to medium-sized cross-sectional studies were identified to focus on anxiety symptoms in MRKH patients.Thus,the aim of this study was to explore the status of anxiety symptoms and the related factors in patients with MRKH syndrome.Methods:This cross-sectional study involving 141 patients with MRKH syndrome and 178 healthy women was conducted from January 2018 to December 2018.All participants were required to complete a demographic questionnaire and the Generalized Anxiety Disorder 7-item scale(GAD-7),Patient Health Questionnaire-9,Eysenck Personality Questionnaire-Revised,Short Scale for Chinese,and Chinese Version of the Female Sexual Function Index.The main outcome was the anxiety symptoms measured by the GAD-7.Main outcome was compared between the MRKH syndrome group and the healthy control group.Then,we explored the related factors by comparing patients with and without anxiety symptoms.Results:Of the respondents,24.1%experienced moderate to severe anxiety symptoms.Patients with MRKH syndrome manifested more severe anxiety symptoms than healthy women.Negative self-evaluation of femininity(odds ratio[OR]2.706,95%confidence interval[CI]1.010-7.247),neurotic personality traits(OR 1.100,95%CI 1.029-1.175),and coexisting depressive symptoms(OR 4.422,95%CI 1.498-13.049)were more prevalent in anxious patients.Conclusion:The findings stress the importance of anxiety symptom screening in MRKH patients and identify patients at risk of anxiety symptoms,providing a possible basis for future intervention.

针刺联合血府逐瘀汤治疗睫状视网膜动脉阻塞1例

The report presented a case of cilioretinal artery occlusion. A 22-year-old woman, with a complain of reduced visual acuity of the right eye for 4 days, presented with blurred vision and inferior visual field defect at the time of visit. Acupuncture combined with herbal medication of Xuefu Zhuyu Decoction was applied for the patient. Main acupoints included Jingming (BL1), Qiuhou (EX-HN7), Sizhukong (TE23), Yuyao (EX-HN3), Sibai (ST2), Fengchi (GB20), Hegu (LI4), Guangming (GB37) and Taichong (LR3). The needles were remained for 30 min in each session, which was given once daily for 10 days. The modified Xuefu Zhuyu Decoction (Semen Juglandis [10 g], Flos Carthami [10 g], Rhizoma Chuanxiong [10 g], Radix Paeoniae Rubra [10 g], Radix Rehmanniae [15 g], Radix Angelicae Sinensis [10 g], Radix Bupleuri [10 g], Fructus Aurantii [5 g], Radix et Rhizoma Glycyrrhizae Praeparata cum Melle [6 g], Fructus Crataegi [20 g], Endothelium Corneum Gigeriae Galli [10 g], Scorpio [5 g], Herba Leonuri [15 g], Radix Astragali [35 g] and Ramulus Cinnamomi [10 g]) was applied one dose daily for 7 days. After 7 days of treatment, the visual acuity of the patient was increased from 0.04 to 0.6 in the right eye with spectacles, the retinal fundus edema disappeared and the inferior vision field defect relieved. With acupuncture treatment for another 10 days, it was observed that the visual acuity of the patient's right eye was improved and the inferior vision field defect reduced. There was no symptom recurrence and the visual acuities in both eyes of the patient were 1.0 with spectacles till the latest follow-up. This therapy provided a new idea and approach to treat cilioretinal artery occlusion.