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测定妊娠期妇女羊水中微量元素锌、铜(Zn、Cu)的含量变化,对预测胎儿的发育情况,具有一定的参考价值。本文介绍一种利用紫外辐射消化技术,对羊水进行预处理后,再用阳极溶出伏安(ASV)方法测定。讨论了辐射条件,并通过重复性、回收率及线性关系来证实方法的可靠性和准确性。与传统的湿式消化法相比,紫外辐射法有取样量少、温度低)、不易挥发、操作简便及较低的试剂空白值等优点。 相似文献
3.
Takayuki ISHIKAWA Kazuhito TAKEUCHI Taiki YAMAMOTO Yuichi NAGATA Atsushi NATSUME 《Neurologia medico-chirurgica》2021,61(2):117
Recently neurosurgical operations have been carried out with water irrigation such as endoscopic third ventriculostomy and tumor resections in ventricles. Water irrigation is one of several published methods that promote hemostasis; however, not enough experimental evidence exists on its efficacy. In this study, we investigate whether hydrostatic pressure and persistent irrigation promote hemostasis in neuroendoscopic surgery. We dissected tails of 12–16-week-old C57BL/6 male mice at 5 mm proximal from the tip and checked for bleeding times under dry and wet conditions at pressures of 0 cmH2O, 10 cmH2O, 15 H2O, and 20 cmH2O without persistent irrigation to bleeding point and 10 cmH2O with persistent irrigation. We then examined the dissected edge with hematoxylin–eosin staining and measured the size of vessels. The average bleeding time of each group is as follows: dry: 203.4 sec, wet: 164.4 sec, 5 cmH2O: 138.6 sec, 10 cmH2O: 104.6 sec (P <0.001), 20 cmH2O: 56 sec (P <0.001), and 10 cmH2O with persistent irrigation: 72.8 sec (P <0.01 compared to 10 cmH2O without persistent irrigation). The maximum caliber of mice’s tail artery was 50–60 μm. Hydrostatic pressure and irrigation are important factors contributing to hemostasis. 相似文献
4.
目的:观察银黄洗剂治疗下肢血栓性浅静脉炎的临床疗效。方法:将62例诊断为下肢血栓性浅静脉炎的患者随机分为对照组和观察组,各31例。对照组在常规治疗的基础上应用硫酸镁湿敷,观察组在常规治疗的基础上应用银黄洗剂湿敷,疗程均为10 d。比较两组患者临床症状评分(皮肤颜色、患肢肿胀、硬索结节及疼痛的评分)、相关实验室指标(超敏C反应蛋白及纤维蛋白原)的变化情况以及总有效率。结果:观察组总有效率90.32%,高于对照组的64.52%(P<0.05)。与治疗前比较,两组症状体征评分明显改善,超敏C反应蛋白及纤维蛋白原明显降低(P<0.05)。观察组在改善症状体征及降低炎性反应方面较对照组更明显(P<0.05),两组治疗后纤维蛋白原数值比较,差异无统计学意义(P>0.05)。结论:银黄洗剂治疗下肢血栓性浅静脉炎,可有效改善患者临床症状及降低炎性反应,明显提高临床疗效。 相似文献
5.
采用湿法纺丝工艺纺制了聚醚酰亚胺(PEI)-聚苯醚砜(PES)中空纤维H2-N2和He-N2分离共混膜,得到H2和He的渗透通量及选择性为:JH2=360GPU,αH2/N2=162,JHe=181GPU,αHe/N2=76.7;研究了芯液组成及其流量对膜性能的影响。通过扫描电镜,分析了中空纤维膜的结构,讨论了膜制备过程中的相转化原理。 相似文献
6.
Piffkó J Bánkfalvi Á Öfner D Tötsch M Berens A Joos U Böcker W Schmid KW 《Pathology oncology research : POR》1996,2(1-2):37-42
Formalin fixed and paraffin embedded samples from 36 squamous cell carcinomas of the larynx and the oral cavity (pT2N0M0, R0) surrounded by non-tumorous mucosa were studied immunohistochemically using a panel of four different anti-p53 antibodies
(CM1, PAbl801, D07, PAb240), a monoclonal anti-mdm2 antibody and MIB1, following wet autoclave antigen retrieval. P53 immunoreactivity
was detected in 11/14 laryngeal and in 9/22 oral carcinomas. All p53 positive oral, and all but one laryngeal tumors revealed
mdm2 positivity as well, whereas in p53 negative tumors 4/12 and 1/3 mdm2 immunopositive cases were demonstrated, respectively.
MIB1 labeling indices of the tumors ranged between 18% – 64% in p53 positive cases, and 10% – 53% in p53 negative ones. The
difference was not statistically significant. Close spatial coexpression of p53, mdm2 and MIB1 immunoreactivity was observed
at the invasive front of the carcinomas and in the basal and suprabasal layers of the non-tumorous epithelium in all p53 positive
cases. However, the MIB1 expression was similarly increased at the invasive margins in carcinomas lacking immunohistochemically
detectable p53 alterations. Our results strongly suggest that p53 overexpression does not necessarily correspond to increased
rate of proliferation, but rather to mdm2 overexpression and is largely dependent on the anatomical site in case of small
and localized squamous cell carcinomas of the head and neck region. 相似文献
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8.
中药湿敷与合理护理治疗急性湿疹 总被引:2,自引:0,他引:2
许小梅 《浙江中医药大学学报》2006,30(1):85-85
[目的]观察中药湿敷治疗急性湿疹的疗效。[方法]采用自制中药湿敷配合护理治疗56例急性湿疹。[结果]经1个疗程以上治疗后治愈31例,显效20例,好转5例,总有效率100%。[结论]中药湿敷是治疗急性湿疹的有效方法之一,合理护理使治疗更显疗效。 相似文献
9.
《Acta biomaterialia》2014,10(4):1663-1670
Marine organisms process and deliver many of their underwater coatings and adhesives as complex fluids. In marine mussels one such fluid, secreted during the formation of adhesive plaques, consists of a concentrated colloidal suspension of a mussel foot protein (mfp) known as Mfp-3S. The results of this study suggest that Mfp-3S becomes a complex fluid by a liquid–liquid phase separation from equilibrium solution at a pH and ionic strength reminiscent of the conditions created by the mussel foot during plaque formation. The pH dependence of phase separation and its sensitivity indicate that inter-/intra-molecular electrostatic interactions are partially responsible for driving the phase separation. Hydrophobic interactions between the non- polar Mfp-3S proteins provide another important driving force for coacervation. As complex coacervation typically results from charge–charge interactions between polyanions and polycations, Mfp-3S is thus unique in being the only known protein that coacervates with itself. The Mfp-3S coacervate was shown to have an effective interfacial energy of ⩽1 mJ m−2, which explains its tendency to spread over or engulf most surfaces. Of particular interest to biomedical applications is the extremely high adsorption capacity of coacervated Mfp-3S on hydroxyapatite. 相似文献
10.