推拿法引发人骨骼肌细胞生物学效应的机制探讨

目的：探索推拿法力学作用引发人骨骼肌细胞生物学效应的机制。方法：采用细胞培养技术,建立人骨骼肌细胞损伤模型后,将正常细胞和损伤细胞各自分为空白对照组、推拿法组、推拿法＋维拉帕米组、静态压力组和静态压力＋维拉帕米组。分别对各组细胞进行推拿法样刺激或静压刺激,持续时间10 min。其后对各组细胞的超氧化物歧化酶（SOD）活力、丙二醛（MDA）含量、肌酸激酶（CK）活力进行检测。结果：推拿法可以提高人骨骼肌细胞内SOD活力,降低细胞内MDA含量以及细胞上清中的CK活力;在加入钙离子拮抗剂———维拉帕米后,各项指标的变化均受到明显的影响。结论：推拿法的力学作用主要通过影响人骨骼肌细胞中钙离子的信号通路,从而激发损伤细胞修复的生物学效应。     

垂直防渗技术在苏州市七子山垃圾填埋场扩建工程中的应用

介绍了苏州市七子山老垃圾填埋场和新扩建填埋场的概况,由于原有的老垃圾填埋场垂直防渗性能达不到最新的防渗标准,在新扩建垃圾填埋场的过程中在老垃圾填埋场下游重新建立了垂直防渗系统,该系统采用高压帷幕灌浆结合塑性混凝土墙的施工工艺,其防渗性能达到CJJ 113—2007生活垃圾卫生填埋场防渗系统技术规范的要求。     

氡染毒大鼠肺组织病理改变与CcO活性的相关性研究

目的 观察氡染毒对大鼠肺组织的病理改变以及线粒体细胞色素C氧化酶(CcO)活性的影响。方法 多功能生态氡室对Wistar大鼠进行氡及其子体染毒,累积染毒剂量分别达100、200、400WLM,染毒后观察各组大鼠的肺组织损伤程度,提取大鼠肺组织线粒体进行CcO活性的测定。结果 染毒后肺组织主要病理变化为肺间质充血水肿,炎症细胞浸润,纤维化变性,肺泡腔萎缩消失。线粒体CcO的活性随着染氡剂量的增加逐渐降低,并且与肺泡间隔厚度成负相关,与肺泡腔面积成正相关。结论 氡染毒后肺组织的病理改变与CcO的活性相关。     

Ultrasonic-Aided Co-Precipitation of Tannins and Chitosan Ammonium Salt on Cotton Fabric for Antimicrobial and Ultraviolet-Shielding Properties: An Efficient,Colourless, and Eco-Finishing Strategy

Sustainable fabrication of protective cotton, using bio-extracts, is becoming increasingly attractive. However, many shortcomings—including the introduction of potentially hazardous mordants or modifiers to cotton, annoying colour changes after finishing, and low processing efficiency—require further melioration. Therefore, an efficient ultrasonic-assisted colourless finishing process was developed in this study, to fabricate ultraviolet-proof and antimicrobial cotton. A pair of oppositely charged bio-based substances, i.e., tannin acid (TA) and hydroxypropyltrimethyl ammonium chloride chitosan (HACC) were introduced during the ultrasonic process. The results reveal that cationic HACC significantly promotes the adsorption of TA to cotton. The apparent colour of the cotton remained almost unchanged after finishing. Based on Pesudo first-/second-order kinetic models, chemisorption was verified as the dominant mechanism. Efficiency under ultrasound was enhanced by 5.3% (70 °C) and 27% (90 °C), respectively. A mathematical modelling study established the factors to be in the following order of significance: concentration > pH > temperature. Under optimal conditions, a theoretical maximum UPF of 380.8 was achieved. TA (8 g/L)-treated cotton deactivated up to 98% of Escherichia coli, and also provided excellent UV-shielding performance. In general, the ultrasonic-assisted eco-dyeing and finishing process for cotton was explored in depth from practical and theoretical perspectives, which should push forward the development of the sustainable textile industry.     

Correlation between C-reactive protein/albumin ratio and prognosis in patients with lung adenocarcinoma

ObjectiveThis study was performed to examine the relationship between the C-reactive protein/albumin ratio (CAR) and the prognosis of patients with lung adenocarcinoma and thus provide a reference for evaluating the prognosis of lung adenocarcinoma.MethodsThe clinical data of 130 patients with lung adenocarcinoma were retrospectively collected and analyzed. The patients’ overall survival (OS) time was calculated, and the factors affecting OS were statistically analyzed.ResultsThe CAR was correlated with sex, clinical stage, brain metastasis, S100 calcium-binding protein B (S100B), interleukin 17, myelin basic protein, squamous cell carcinoma antigen (SCC-Ag), and the lymphocyte count. The median OS was significantly shorter in the high- than low-CAR group (18 vs. 64 months, respectively). The CAR, clinical stage, brain metastasis, S100B, interleukin 17, SCC-Ag, C-reactive protein, albumin, and neutrophil count affected the OS of patients with lung adenocarcinoma. The CAR and clinical stage were independent risk factors for a poor prognosis in patients with lung adenocarcinoma.ConclusionsThe CAR and clinical stage are independent risk factors for OS in patients with lung adenocarcinoma.     

血清抑制素A在预测孕早期先兆流产孕妇妊娠结局中的应用

目的探讨抑制素A在预测孕早期先兆流产孕妇妊娠结局中的价值。方法选择孕6～13周稽留流产孕妇18例及B超检查示活胎的先兆流产孕妇27例（妊娠继续组17例和难免流产组10例）,同孕龄正常孕妇40例。采用ELISA法测定各组孕妇血清抑制素A水平。结果正常孕妇血清抑制素A在孕早期随孕龄增加而增加,孕10～11周达高峰,孕12～13周逐渐降低。难免流产组血清抑制素A水平明显低于妊娠继续组（P〈0.01）;当抑制素A〈0.3 MoM时可筛查出90%的难免流产,敏感性为90%,特异性为94.1%。结论孕早期血清抑制素A的检测有助于预测先兆流产孕妇不良妊娠结局,当血清抑制素A〈0.3 MoM时对预测难免流产有较高的敏感性和特异性。     

湖泊水源地突发苯酚污染底泥表层扩散吸附研究

本实验重点关注湖泊水源地突发性苯酚污染事故中底泥表层的污染情况,建立数学模型并通过模拟实验,对污染发生后36 h底泥中苯酚浓度的连续监测,研究了污染时间、底泥深度、温度和pH对扩散的影响,验证了与上述四个因素相关的数学模型.结果表明:由于底泥对苯酚存在吸附—脱吸作用,需要对扩散系数进行修正,并且对于不同的底泥组成其修正...     

中耳胆固醇肉芽肿的诊断和手术治疗

目的探讨中耳胆固醇肉芽肿(CG)的发病机制、临床特点及治疗效果。方法回顾性分析43例CG患者的临床资料，其中42病例经手术及病理证实。主要临床表现包括听力下降43/43例，耳闷感29/43例，咖啡样耳漏12/43例，耳鸣26/43例。蓝鼓膜为典型体征36/43例。颞骨高分辨CT（HRCT）主要表现为中耳乳突软组织阴影，可伴有听骨链破坏（17/43），手术中发现（13/43）与术前符合率76.47%（13/17）。结果手术方法选择完璧式乳突切除+鼓室探查+鼓室置管术31例，完璧式乳突切除+鼓室探查+听骨链重建术11例，单纯鼓室置管术1例。术后随访0.5～3.0年,无复发。术后1～2个月鼓膜颜色恢复正常，听力均有不同程度提高，骨气导间距平均减少（25.0±3.5）dB。结论CG的主要临床表现为听力下降、耳闷感、耳鸣、咖啡样耳漏和蓝鼓膜。HRCT对中耳胆固醇肉芽肿诊断及手术有重要参考价值。诊断明确应采取手术治疗,清除病变,建立鼓室及乳突的通气、引流，并重建听力     

Synthesis and Anticancer Activity of Bagasse Xylan/Resveratrol Graft-Esterified Composite Nanoderivative

Biomass materials are high-quality raw materials for the preparation of natural, green and highly active functional materials due to their rich active groups, wide sources and low toxicity. Bagasse xylan (BX) and resveratrol (Res) were used as raw materials to introduce ethylene glycol dimethacrylate (EGDMA) via grafting reaction to obtain the intermediate product BX/Res-g-EGDMA. The intermediate was esterified with 3-carboxyphenylboronic acid (3-CBA) to obtain the target product 3-CBA-BX/Res-g-EGDMA. The BX/Res-composite-modified nanoderivative with antitumor activity was synthesized with the nanoprecipitation method. The effects of the reaction conditions on the grafting rate (G) of BX/Res-g-EGDMA and the degree of substitution (DS) of 3-CBA-BX/Res-g-EGDMA were investigated using single-factor experiments. The results showed that under the optimized process conditions, G and DS reached 142.44% and 0.485, respectively. The product was characterized with FTIR, XRD, TG-FTC, ¹H NMR and SEM, and its anticancer activity was simulated and tested. The results showed that 3-CBA-BX/Res-g-EGDMA had a spherical structure with an average particle size of about 100 nm and that its crystalline structure and thermal stability were different from those of the raw materials. In addition, 3-CBA-BX/Res-g-EGDMA showed the best docking activity with 2HE7 with a binding free energy of −6.3 kJ/mol. The inhibition rate of 3-CBA-BX/Res-g-EGDMA on MGC80-3 (gastric cancer cells) reached 36.71 ± 4.93%, which was 18 times higher than that of BX. Therefore, this material could be a potential candidate for biomedical applications.