Interlayer coupling and the phase transition mechanism of stacked MoS2/TaS2 heterostructures discovered using temperature dependent Raman and photoluminescence spectroscopy

Ultrathin 1T (tetragonal)-TaS₂ and monolayer MoS₂ heterostructures were prepared to study their phase transition (PT) mechanisms and band structure modulation. The temperature dependency of photoluminescence (PL) and Raman spectra was utilized to study interlayer coupling and band structure. The PL results indicate that the band structure of MoS₂/TaS₂ heterostructures undergoes a sharp change at 214 K. This is attributed to the PT of 1T-TaS₂ from a Mott insulator state to a metastable state. In addition, the temperature dependency of the MoS₂/TaS₂ Raman spectra illustrates that the phonon vibration of the heterojunction is softened due to the effect of interlayer coupling. The present work could provide an avenue to create material systems with abundant functionalities and physical effects.

The important interlayer coupling of the MoS₂–TaS₂ heterostructure and the phase transition mechanism of ultrathin 1T-TaS₂ are described.     

1例剖宫产术后阵发性睡眠性血红蛋白尿症患者继发脾破裂的护理

总结1例剖宫产术后阵发性睡眠性血红蛋白尿症患者继发脾破裂的护理经验。包括脾破裂后快速建立静脉通路,密切监测血压、腹内压变化;减少输血时的溶血反应并做好栓塞的观察与预防;血浆置换的管理;依库丽单抗注射液的应用,避免不良反应的发生;进行保护性隔离,降低感染风险;做好患者的心理护理及健康宣教,帮助其树立战胜疾病的信心。经过精心的治疗及护理,患者于入院后16 d出院。     

巢蛋白在不同发育阶段人胚胎脊髓中的表达变化

目的:研究人胚胎脊髓生长发育过程中巢蛋白(nestin)的变化趋势。方法:采用免疫组织化学方法对不同发育时期(3周～8个月)的人胚胎脊髓中巢蛋白(nestin)的表达及变化进行了研究。结果:Nestin阳性细胞在神经上皮贯穿整个发育过程,5周基板、翼板形成后即可见到阳性物,而边缘层6周出现。中央管、基板、翼板、边缘层内nestin阳性细胞达高峰的时间分别是6周、7周、8周、9周,而表达明显减少的时间分别是8周、9周、10周、11周。随着脊髓的发育成熟,灰、白质内nestin阳性产物逐渐减少,而中央管的阳性细胞数至3月后较为稳定。结论:在脊髓不同部位神经干细胞出现时间和达到高峰的时间均不同,提示在脊髓的不同部位神经干细胞增殖、分化并不同步。     

不同类型种植覆盖义齿临床疗效的回顾性研究

目的:回顾性分析无牙颌不同类型种植覆盖义齿的临床疗效.方法:随访46名种植覆盖义齿修复的无牙颌患者,进行影像学和临床检查,并记录机械并发症的发生情况.通过种植体存留率、边缘骨吸收量、种植体周围软组织情况、机械并发症发生情况和患者满意度来评估种植体覆盖义齿的临床疗效.结果:在随访时间内(64±36)月,种植体存留率是93.44％,种植体边缘骨吸收量为(1.32±1.13)mm.不同附着体支持的种植覆盖义齿修复后种植体边缘骨吸收量、探诊出血指数无统计学差异(P>0.05),探诊深度、菌斑指数和牙龈增生指数有统计学差异(P<0.05),牙龈增生多见于杆卡组.机械并发症主要有固位帽松动、固位力不足、基台磨损和螺丝松动.患者对覆盖义齿的总体满意度较高.结论:不同附着体支持的种植覆盖义齿均取得良好的临床疗效,提高了患者的生活质量.     

本科护生不确定压力与职业自我效能的相关性研究

目的探讨本科护生职业自我效能的现状,分析不确定压力对护生职业自我效能的影响。方法采取整群便利抽样法,2020年4月10—17日,选取浙江省4所高校1526名护理本科生为研究对象。采用护生一般情况问卷、护生职业自我效能问卷(PSQNS)及不确定压力问卷对其进行横断面调查。采用多重线性回归分析护生职业自我效能的影响因素。共发放问卷1526份,回收有效问卷1474份,有效回收率为96.6%。结果1474名本科护生PSQNS总分为(91.10±14.11)分,条目均分为(3.37±0.52)分,得分率为67.48%,处于中等水平。多重线性回归分析结果显示,护理专业喜爱程度、不确定压力、在校学业成绩、选择护理专业原因及家庭经济状况是本科护生职业自我效能的影响因素(P<0.05),可解释33.4%的变异。结论本科护生的职业自我效能有待提升;护理教育者可以通过降低护生的不确定压力,提高其职业自我效能。     

A non-metal route to realize the bio-based polyester of poly(hexylene succinate): preparation conditions,side-reactions and mechanism in sulfonic acid-functionalized Brønsted acidic ionic liquids

A biodegradable linear bio-based polyester of poly(hexylene succinate) was effectively prepared in non-metal sulfonic acid-functionalized Brønsted acidic ionic liquids (SFBAILs) as both the catalyst and the polymerization medium, and the processes of polycondensation and post-polycondensation in SFBAILs were also investigated. In addition, the side reactions which were detrimental to the growth of M_w of poly(hexylene succinate) were evaluated and the synthesis mechanism of poly(hexylene succinate) catalyzed by SFBAILs was discussed with the help of DFT calculations. The result shows that both the imidazole ring and the sulfonic group on cations of SFBAILs play an important role in the catalytic process.

Biobased poly(hexylene succinate) synthesized in sulfonic acid-functionalized Brönsted acidic ionic liquids was monitored by ¹H NMR spectra and DFT calculations.     

肝豆状核变性所致精神障碍患者的综合护理干预

目的：探讨肝豆状核变性所致精神障碍患者的护理干预效果。方法对36例肝豆状核变性所致精神障碍患者在进行驱铜及抗精神病药物治疗的同时,予以综合护理干预。结果本组患者接受治疗及综合护理干预后,躯体症状均得到缓解,精神症状得到不同程度的控制。结论肝豆状核变性所致精神障碍患者在常规驱铜及抗精神病药物治疗的基础上,予以综合护理干预,能显著改善患者的临床症状,提高生活质量。     

A meta-analysis of the associations between the Q141K and Q126X ABCG2 gene variants and gout risk

Background: Gout is an inflammatory disease in which genetic factors play a role. ABCG2 is a urate transporter, and the Q141K and Q126X variants of ABCG2 have been associated with a risk of developing gout, though previous studies of these associations have been inconsistent. Therefore, we conducted a meta-analysis to explore the relationship between these genetic variants and gout. Methods: We examined 8 electronic literature databases. In total, 9 eligible articles on the associations between the Q141K (rs2231142) and Q126X (rs72552713) variants and gout risk, including 11 case-control studies were selected. We used odds ratios (OR) and 95% confidence intervals (CI) to assess the strength of these relationships in dominant, recessive, and co-dominant models. Results: This study included 6652 participants (2499 gout patients and 4153 controls). The Q141K variant was found to significantly increase the risk of gout in Asians (dominant model: OR=2.64, 95% CI=2.04-3.43, P=0.02 for heterogeneity; recessive model: OR=3.19, 95% CI=2.56-3.97, P=0.28 for heterogeneity; co-dominant model: OR=1.37, 95% CI=1.18-1.59, P=0.09 for heterogeneity) and other populations (dominant model: OR=1.85, 95% CI=1.20-2.85, P<0.0001 for heterogeneity; recessive model: OR=3.78, 95% CI=2.28-6.27, P=0.19 for heterogeneity; co-dominant model: OR=1.48, 95% CI=1.26-1.74, P=0.19 for heterogeneity). The Q126X variant also significantly increased the risk of gout in Asians (dominant model: OR=3.87, 95% CI=2.07-7.24, P=0.06 for heterogeneity). Conclusions: These results suggest associations between the rs2231142 and rs72552713 ABCG2 gene polymorphisms and gout risk, which led to unfavorable outcomes. However, studies with larger sample sizes and homogeneous populations should be performed to confirm these results.     

Knockdown of WISP1 inhibit proliferation and induce apoptosis in ALL Jurkat cells

WISP1, a Wnt-induced secreted protein, has been found to have anticancer activity. ALL is a leading cause of death. Here we investigate the WISP1 effects on ALL Jurkat cells. Cell viability was assessed by CCK-8. Cell cycle and apoptosis were detected by flow cytometry. Mitochondrial membrane potential (MMP) was monitored using TMRM. Generation of reactive oxygen species (ROS) was quantified using DCFH-DA. Western blot was used to detect the expression of cell proliferation and apoptosis related genes. The results showed that knockdown of WISP1 significantly inhibited proliferation of Jurkat cells. Parallelly, cell cycle distribution was increased at G1 phase and apoptotic rate was induced after WISP1 knockdown. Furthermore, knockdown of WISP1 induced apoptosis of Jurkat cells was also associated with loss of MMP and generation of ROS. Western blot results showed that the protein expression p-AKT, PCNA, CDK1, P-ERK, CDK2, VEGF, VEGFR2 and Bcl2 were decreased, while the expression of Bax was up-regulated. In conclusion, WISP1 plays an important role in proliferation and apoptosis of Jurkat cells in mitochondria dependent pathway, the specific mechanisms need further study.     

热敏灸联合身痛逐瘀汤治疗腰椎间盘突出症微创术后残留症状的临床研究

[目的]观察热敏灸联合身痛逐瘀汤治疗腰椎间盘突出症微创术后残留腰腿痛的临床疗效。[方法]将2019年3月至2019年12月浙江省中西医结合医院66例符合纳入标准的患者随机分为A组、B组、C组,每组各22例,A组予热敏灸联合身痛逐瘀汤治疗,B组予身痛逐瘀汤治疗,C组予热敏灸治疗。14d治疗结束后,合格病例计66例,采用视觉模拟评分(visual analogue scale,VAS)、日本骨科协会(Japanese Orthopaedic Association,JOA)评分、健康量表评分(36-Item Short Form Survey,SF-36)评估疗效,同时以安全性指标评价治疗安全性。[结果]A组、B组、C组总有效率分别为95-5%、77-3%、81-8%,三组间差异具有统计学意义(P=0-027),A组显著优于B组与C组(P=0-023,P=0-015)。与治疗前比较,三组治疗后的JOA评分均明显升高、VAS评分显著降低(P＜0-05);组间比较,A组JOA评分显著高于B组与C组(P＜0-05),VAS评分明显低于B组和C组(P＜0-05),而B组与C组之间差异无统计学意义(P＞0-05)。除情感功能和社会职能两项,A组SF-36评分均优于B组、C组(P＜0-05),B组与C组间比较各有优劣,但差异无统计学意义(P＞0-05)。本研究过程中无任何明显不良事件的报告。[结论]热敏灸配合身痛逐瘀汤对缓解腰椎间盘突出症微创术后残留症状的疗效显著,明显优于单独使用热敏灸或身痛逐瘀汤,并能有效提高患者术后的生活质量。