Zapline‐plus: A Zapline extension for automatic and adaptive removal of frequency‐specific noise artifacts in M/EEG

Removing power line noise and other frequency‐specific artifacts from electrophysiological data without affecting neural signals remains a challenging task. Recently, an approach was introduced that combines spectral and spatial filtering to effectively remove line noise: Zapline. This algorithm, however, requires manual selection of the noise frequency and the number of spatial components to remove during spatial filtering. Moreover, it assumes that noise frequency and spatial topography are stable over time, which is often not warranted. To overcome these issues, we introduce Zapline‐plus, which allows adaptive and automatic removal of frequency‐specific noise artifacts from M/electroencephalography (EEG) and LFP data. To achieve this, our extension first segments the data into periods (chunks) in which the noise is spatially stable. Then, for each chunk, it searches for peaks in the power spectrum, and finally applies Zapline. The exact noise frequency around the found target frequency is also determined separately for every chunk to allow fluctuations of the peak noise frequency over time. The number of to‐be‐removed components by Zapline is automatically determined using an outlier detection algorithm. Finally, the frequency spectrum after cleaning is analyzed for suboptimal cleaning, and parameters are adapted accordingly if necessary before re‐running the process. The software creates a detailed plot for monitoring the cleaning. We highlight the efficacy of the different features of our algorithm by applying it to four openly available data sets, two EEG sets containing both stationary and mobile task conditions, and two magnetoencephalography sets containing strong line noise.     

活血化瘀强度与气血双亏型胃癌转移率相关性机理探讨

本文回顾研究了益气生血方剂中活血化瘀强度与气血双亏型胃癌转移率之间的相关性,显示两者有较强的正相关,提示气血双亏型胃癌转移率随活血化瘀作用加强而增高。推测可能与本型胃癌血小板数量及聚集性下降、血浆纤维蛋白含量低及凝血抑制、纤溶增强易于肿瘤转移有关,且大多数活血化瘀方药具有抑制血小板聚集,抗血凝和增加纤溶的现代药理机制。进而建议气血双亏型胃癌,在血小板数量及聚集率明显下降、凝血时间明显延长及FDP高时,尽量降低方剂中活血化瘀强度,以避免促进肿瘤转移。     

阴式子宫瘢痕妊娠病灶清除术的临床疗效评价

目的 观察阴式子宫瘢痕妊娠病灶清除术治疗剖宫产术后瘢痕妊娠的意义.方法 选取我院2018年10月—2019年10月收治的64例剖宫产术后瘢痕妊娠患者的临床资料,根据手术方案的不同,将实施阴式子宫瘢痕妊娠病灶清除术的病例作为观察组(n=33),将选择腹腔镜子宫瘢痕妊娠病灶消除术的病例作为对照组(n=31).比较两组手术疗...     

Enhanced Nitrate Ions Remediation Using Fe0 Nanoparticles from Underground Water: Synthesis,Characterizations, and Performance under Optimizing Conditions

The presence of nitrates in water in large amounts is one of the most dangerous health issues. The greatest risk posed by nitrates is hemoglobin oxidation, which results in Methemoglobin in the human body, resulting in Methemoglobinemia. There are many ways to eliminate nitrates from underground water. One of the most effective and selective methods is using zero-valent iron (ZVI) nanoparticles. ZVI nanoparticles can be easily synthesized by reducing ferric or ferrous ions using sodium borohydride. The prepared ZVI nanoparticles were examined by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), electron microscopy (TEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area, and zeta potential. We aim to eliminate or reduce the nitrates in water to be at the acceptable range, according to the world health organization (WHO), of 10.0 mg/L. Nitrate concentration in water after and before treatment is measured using the UV scanning method at 220 nm wavelength for the synthetic contaminated water and electrochemical method for the naturally contaminated water. The conditions were optimized for obtaining an efficient removing process. The removal efficiency reaches about 91% at the optimized conditions.     

早期拔除尿管对腹腔镜下结肠癌术后镇痛患者的影响

目的 探讨腹腔镜下结肠癌术后镇痛期间拔除尿管对患者尿潴留及相关并发症的影响.方法 分析本院2014年1月至2015年12月腹腔镜下结肠癌术后留置镇痛泵的患者46例,其中实验组23例(留置镇痛泵期内拔除尿管),对照组23例(停用镇痛泵后拔除尿管).两组术后尿潴留率、尿路感染率、肺部感染率、伤口感染率及满意率等指标比较.结果 两组患者的尿潴留率(8.7％比4.3％)、肺部感染率(4.3％比8.7％)、伤口感染率(4.3％比13.0％),差异均无统计学意义(均P＞0.05).两组患者均未出现导尿管相关性尿路感染.实验组满意率78.3％高于对照组47.8％,差异有统计学意义(P＜0.05).结论 腹腔镜下结肠癌术后留置镇痛泵的患者早期拔除尿管是安全可行的,且能减轻留置尿管引起的不适.     

Recent Advances in Adsorptive Nanocomposite Membranes for Heavy Metals Ion Removal from Contaminated Water: A Comprehensive Review

Water contamination is one of the most urgent concerns confronting the world today. Heavy metal poisoning of aquatic systems has piqued the interest of various researchers due to the high toxicity and carcinogenic consequences it has on living organisms. Due to their exceptional attributes such as strong reactivity, huge surface area, and outstanding mechanical properties, nanomaterials are being produced and employed in water treatment. In this review, recent advances in the use of nanomaterials in nanoadsorptive membrane systems for wastewater treatment and heavy metal removal are extensively discussed. These materials include carbon-based nanostructures, metal nanoparticles, metal oxide nanoparticles, nanocomposites, and layered double hydroxide-based compounds. Furthermore, the relevant properties of the nanostructures and the implications on their performance for water treatment and contamination removal are highlighted. The hydrophilicity, pore size, skin thickness, porosity, and surface roughness of these nanostructures can help the water permeability of the nanoadsorptive membrane. Other properties such as surface charge modification and mechanical strength can improve the metal adsorption effectiveness of nanoadsorptive membranes during wastewater treatment. Various nanocomposite membrane fabrication techniques are also reviewed. This study is important because it gives important information on the roles of nanomaterials and nanostructures in heavy metal removal and wastewater treatment.     

锁定钢板螺钉取出困难原因及解决方法的探讨

目的探讨锁定钢板螺钉取出困难的原因和解决方法。方法回顾分析10例锁定钢板螺钉取出困难患者的临床资料。结果螺钉取出困难的原因：钢板应力变形,锁定螺丝孔道变形,旋入螺钉时未使用卸力限制工具,螺钉内六角打滑,取钉方法错误。结论锁定钢板螺钉内固定及取出时应严格规范操作,使用专用工具及方法,可顺利取出内固定,并避免医源性骨折。     

血肿清除加去骨瓣减压术治疗重症高血压基底节脑出血

目的探索血肿清除加去骨瓣减压及硬膜减张缝合在治疗高血压基底节脑出血的患者中的疗效。方法连续收集去骨瓣手术治疗的35例患者,记录的数据包括术前GCS评分,血肿大小,瞳孔反应,ICH评分等。随访指标有30d死亡率以及最近一次的ADL评分。结果 35例患者中27例(77%)30d内存活。27例存活者在平均13个月的随访中16例(62%)神经功能预后良好(ADL评分I-Ⅲ级)。结论高血压基底节脑出血患者施行血肿清除合并去骨瓣减压术有望降低死亡率,改善神经功能预后。     

脑血肿内血红蛋白与其MR成像关系的研究

目的：探讨脑血肿内血红蛋白与其ＭＲ成像的关系。材料与方法：用２５条犬建立２５个各期龄脑血肿模型进行ＭＲ成像观察，并对１９个血肿模型进行了血红蛋白的生化检测。结果：本研究进一步证实了血红蛋白的演变规律：氧合血红蛋白（ＨｂＯ２）→脱氧血红蛋白（ＤＨｂ）→高铁血红蛋白（ＭＨｂ）→含铁血黄素（Ｈ－Ｓ）。在演变过程中，ＨｂＯ２含量逐渐减少，ＤＨｂ在急性期含量最多并逐渐减少，而ＭＨｂ含量则逐渐增多，并在亚急性晚期和慢性期含量高达９０％以上。结论：脑血肿各阶段血红蛋白的形式及含量与其ＭＲ成像有直接的对应关系。     

活性炭在过氧化氢氧化脱除二苯并噻吩中的催化作用

研究了几种活性炭在过氧化氢氧化二苯并噻吩(DBT)中的催化性能、氧化脱除机理以及碳表面化学对催化性能的影响。考察了活性炭的吸附性能与催化性能以及两者之间的关系、DBT在活性炭上的动态反应活性以及水相pH对其吸附性能和催化性能的影响;并将一种木质活性炭经过3种表面处理,研究了活性炭的表面化学对其催化性能的影响。结果表明:活性炭在过氧化氢氧化DBT中具有较高的催化活性,正辛烷中的DBT转化率可达到81%以上;木质粉末活性炭对DBT的吸附性能优于果壳炭和煤质颗粒活性炭;吸附容量大的活性炭,其催化性能也好;DBT在催化性能高的活性炭作用下的动态反应活性也高;水相pH在低于2的条件下有利于DBT在活性炭上的吸附和催化氧化。DBT的氧化脱除强烈依赖于表面羰基量,是由于表面羰基能加速过氧化氢产生自由基。