CO Oxidation over Pd Catalyst Supported on Porous TiO2 Prepared by Plasma Electrolytic Oxidation (PEO) of a Ti Metallic Carrier

A porous TiO₂ layer was prepared with the plasma electrolytic oxidation (PEO) of Ti. In a further step, Pd was deposited on the TiO₂ surface layer using the adsorption method. The activity of the Pd/TiO₂/Ti catalyst was investigated during the oxidation of CO to CO₂ in a mixture of air with 5% CO. The structure of the catalytic active layer was studied using a scanning electron microscope equipped with an energy dispersive spectrometer (SEM-EDS), time-of-flight secondary ion mass spectrometry (TOF-SIMS), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray diffraction (XRD). The PEO process provided a porous TiO₂ layer with a uniform thickness in the range of 5–10 µm, which is desirable for the production of Pd-supported catalysts. A TOF-SIMS analysis showed the formation of Pd nanoparticles after the adsorption treatment. The conversion of CO to CO₂ in all samples was achieved at 150–280 °C, depending on the concentration of Pd. The composition of Pd/ TiO₂/Ti was determined using ICP-MS. The optimum concentration of Pd on the surface of the catalyst was approximately 0.14% wt. This concentration was obtained when a 0.4% PdCl₂ solution was used in the adsorption process. Increasing the concentration of PdCl₂ did not lead to a further improvement in the activity of Pd/ TiO₂/Ti.     

昆明部分工厂男性吸烟者体内CO及COHb水平与吸烟量的关系分析

[目的]通过对吸烟人员体内CO、COHb含量的测定,分析和了解吸烟者体内COHb水平,作为评价吸烟对人体健康危害的参考指标.[方法]采用美国生产的Micro 4 Smokelyzer型CO测定仪测定CO和COHb,CO和CO-Hb的含量由仪器自动生成.[结果]每日吸烟10-20支,20支以上以及烟龄10年以上者COHb含量分别为2.36,2.85和2.27,超出正常值;经过中位数检验,除每日吸烟20支以上组与10～20支两组间CO和COHb%含量差异无统计学意义(P>0.05)外,其余各组差异均有统计学意义(P<0.05).[结论]每日吸烟10支以上或吸烟烟龄10年以上人群不论是COHb含量还是呼出气CO含量均超过正常值;并且随着每日吸烟量的增加以及吸烟烟龄的增加,COHb含量和呼出气CO含量均呈增长趋势.     

CO2激光内镜下切除早期不同类型喉癌的临床效果和并发症分析

目的 探讨光纤CO₂激光技术治疗早期喉癌的效果、经验和并发症分析。方法 选取山东第一医科大学附属聊城市第二人民医院2014年11月至2019年11月间收治的老年早期喉癌（T₁~T₂）患者88例进行回顾性研究。所有患者采取光纤CO₂激光内镜手术治疗,分析患者的临床效果、术后功能恢复情况和并发症发生,以及并发症与复发率的关系。结果 术中没有发生误伤、大量出血等并发症。2年术后随访,复发11例（12.50%）,复发时间16.8±8.9个月。局部复发10例（11.36%）：5例采用再次TLM（1例Ⅱ型、1例Ⅲ型、3例V型）,2例采用RT治疗,1例环状软骨上型采用开放性手术,2例实施全喉切除术后辅助放疗。病理分期、前连合侵犯、肿瘤侵犯深度与复发之间相关（分别为P=0.035、P=0.017、P=0.025）。其他参数均无统计学意义。结论 CO₂激光技术治疗老年早期喉癌具有喉功能恢复良好、住院时间短、并发症少的特点;病理分期、前连合侵犯、肿瘤侵犯深度与复发有关联。     

CO2 点阵激光和强脉冲光治疗面部光老化的疗效比较

目的 对CO2点阵激光和强脉冲光治疗面部光老化的效果进行比较。方法 选取我院2017年 1月-2018年1月收治的面部光老化患者100例,随机分为对照组及观察组,各50例。对照组行强脉冲光治疗, 观察组行CO2点阵激光治疗,比较两组治疗效果、不良反应发生率及复发率。结果 观察组治疗总有效率为 96.00%,高于对照组的84.00%（P＜0.05）;观察组不良反应发生率为6.00%,低于对照组的20.00%（P＜0.05）; 观察组复发率为6.00%,低于对照组的22.00%（P＜0.05）。结论 与强脉冲光相比,采用点阵激光技术治疗面 部皮肤光老化,能够有效改善患者的满意程度,治疗后要注意使用抗生素避免皮肤感染,通过多种措施预防 不良反应,为治疗效果提供保证。     

Voice quality after CO2 laser cordectomy—What can we really expect?

BACKGROUND: Endoscopic management of laryngeal carcinoma has gained popularity among laryngologists based on the good oncologic and functional results. We evaluated the voice quality after laser cordectomy for early glottic cancer in a variety of vocal situations and its relation with the extension of resection and the age. METHODS: We conducted a cross-sectional study of voice quality in 42 consecutive male patients treated for T1 glottic carcinoma with laser cordectomy. Patients were compared with 21 controls. Voice quality was self-assessed by the patients. Perceptual analysis was done by a speech pathologist on a running speech sample [GRBAS (grade, roughness, breathiness, asthenicity, strain)]. Acoustic analysis included fundamental frequency (F0), jitter, shimmer, noise to harmonic ratio (N/H), and maximum phonation time (MPT) on the sustained vowels /a/ and /i/, and on various running speech voice samples. RESULTS: Distribution of the patients included in the study by T classification was as follows: Tis, n = 2 (4.8%); T1a, n = 35 (83.3%); and T1b, n = 5 (11.9%). Cordectomy types were: (I), 14%; (II), 26%; (III), 21%; and (V), 38%. Voice improved in almost 60% of patients, returning to normal in 45%. GRBAS showed significant differences between patients and controls and correlated with type of cordectomy. Acoustic analysis showed significant differences in F0, and jitter, with smaller differences in shimmer, N/H, and MPT. CONCLUSION: Voice quality after laser cordectomy differs from controls, but improves in a majority of patients after the surgery, with almost 50% of patients with subjective normal or near normal voice. Voice quality depends on type of cordectomy.     

标本保存方法和时间对血清总二氧化碳结果的影响

目的研究不同的标本保存方法和时间对血清总二氧化碳（total carbon dioxide,TCO2）检测结果的影响。方法保证TCO2检测系统稳定性符合实验室质量目标的前提下,利用高值QC（quality control）、低值QC、混合血清3种样本,分别检测室温敞口、室温封口、4℃敞口、4℃封口时不同时间点TCO2的浓度,计算TCO2浓度随时间的变化率。结果高值QC、低值QC、混合血清在室温敞口保存75 min时,TCO2结果分别下降了9.65%、13.42%、7.74%;4℃敞口保存75 min时,TCO2结果分别下降了8.96%、8.60%、3.94%;在室温封口保存90 min时,TCO2结果分别下降了4.53%、9.43%、3.94%;在4℃封口保存2 h,TCO2结果仅分别下降了3.44%、3.56%、2.19%。结论随着标本保存时间的延长血清TCO2浓度不断下降,并且不同的保存方法下降的速率不同。封口保存TCO2结果下降低于敞口状态,保存温度越低TCO2结果下降越慢。     

人类红细胞膜二氧化碳转运相关蛋白AQP-1和RhAG的研究

目的探讨人类红细胞膜上二氧化碳膜转运相关蛋白-水通道蛋白1(aquaporin-1,AQP-1)和RhAG蛋白(Rh-associated glycoprotein,RhAG)在不同二氧化碳浓度下表达量的变化。方法采集新鲜人血抗凝,离心制备红细胞悬液,采用免疫组织化学、流式细胞仪及Western blot法检测在二氧化碳浓度为5%、10%、15%、20%及25%时人类红细胞膜上AQP-1和RhAG的表达情况。结果 AQP-1和Rh蛋白随不同浓度二氧化碳表达量发生了很大变化,其中,AQP-1在二氧化碳浓度为20%时达到高峰,二氧化碳浓度为10%、15%、20%、25%与5%的AQP-1的表达量相比明显增强(P<0.05)。10%、15%、25%浓度之间AQP-1的表达量无显著性差异(P>0.05)。RhAG的表达量在二氧化碳浓度为10%时达到高峰,且10%、15%、20%、25%与5%的二氧化碳浓度下RhAG的表达量相比显著增强(P<0.05)。二氧化碳浓度为10%、15%、20%、25%RhAG之间浓度相比无显著性差异(P>0.05)。结论 AQP-1和RhAG表达量随不同二氧化碳浓度的变化而变化,表明两者在...     

按揉结合治疗中风后肩关节半脱位的临床疗效分析

[目的]观察按揉二步推拿手法对于改善中风后肩关节半脱位（GHS）的作用。[方法]将100例中风后GHS患者随机分为观察组（50例）和对照组（50例）,对照组采用良肢位摆放和康复训练,观察组在对照组的基础上增加按揉二步推拿手法,治疗前后分别给予Fugl-Meyer运动量表（上肢部分）评估和肩峰至肱骨头间距（acromio-humeral interval ,AHI）测量,比较两组间疗效的差异。[结果]经过6周治疗后,观察组上肢部分Fugl-Meyer评分显著高于对照组（P＜0．01）,患侧AHI显著小于对照组（P＜0．05）,观察组显效率优于对照组,且两组相比较差异有显著性（P＜0．05）。[结论]按揉二步推拿手法操作简单,治疗中风后GHS具有较好疗效,值得临床应用推广。     

空气与二氧化碳气腹腹腔镜胆囊切除术的比较

目的 比较空气与CO2气腹腹腔镜胆囊切除术（1aparoscopic cholecystectomy,LC）的临床效果,探讨空气膨腹介质下LC的临床应用价值。方法2013年7～10月109例胆囊良性疾病按本科手术日分为2组,分别施行空气气腹或c0,气腹LC,前者除使用空气气腹外,余均使用常规的腹腔镜手术设备和操作器械,比较2组手术并发症、疼痛反应、术后住院时间、总住院费用等。结果 2组均顺利完成LC,无中转开腹、严重并发症发生。空气组无一例中转CO2气腹手术,与CO2组比较,空气组术后肩痛发生率低（X^2=4.097,P=0.043）、恶心呕吐发生率低（X^2=4.584,P=0.032）、视觉模拟评分低（t=-3.568,P=0.000）、术后排气时间短（Z=-4.287,P=0.000）、术后住院时间短（t=2.312,P=0.023）、住院费用低（t=-3.854,P=0.000）。结论 空气气腹LC安全可行,简易价廉,减少CO2排放,减轻CO2气腹术后并发症。