Li掺杂对4H-SiC光电性质影响的理论研究

采用基于密度泛函理论的第一性原理方法,计算了Li掺杂4H-SiC体系的电子结构及光学性质.结果表明,掺杂前后的4H-SiC均为间接带隙半导体,Li原子间隙掺杂后形成n型半导体,Li原子替位式掺杂体系的禁带中出现了杂质能级,降低了电子跃迁时所需的能量;对电荷差分密度图的分析表明,Li原子失去电子,导致Li-C键和Li-Si键的共价性降低,以离子性为主;在可见光区域,相比于4H-SiC体系,掺杂体系的吸收率峰值均有所提高,其中Li间隙掺杂体系吸收带边最小,吸收率峰值最大,掺杂后的4H-SiC体系对红外、可见光、紫外均能够有所吸收,说明Li掺杂能够有效拓宽4H-SiC对光的响应范围.

Clinical Observation of the Hot and Humid Compress Therapy of Traditional Chinese Medicine in the Treatment of Qi Stagnation and Blood Stasis Type of Lumbar Disc Herniation

Background: Although a number of studies have reported that the hot and humid compress from traditional Chinese medicine (TCM) is effective in treating lumbar disc herniation (LDH) with qi stagnation and blood stasis, clinical evidence is limited. Objective: The purpose of this study is to provide high-quality evidence to support the effectiveness of the traditional Chinese hot and humid compress in the treatment of LDH with qi stagnation and blood stasis. Methods: From October 2021 to November 2023, 86 patients with LDH of qi stagnation and blood stasis type were recruited in our hospital and divided into a control (n = 43) and an observation group (n = 43) according to the random number table method. The control group was given routine clinical treatment, and the observation group was treated with the hot and humid compress therapy for two weeks. The visual analogue scale (VAS) score, Japanese Orthopaedic Association (JOA) score, TCM syndrome score, serum interleukin-6 (IL-6), serum interleukin-1β (IL-1β), and tumor necrosis factor-α (TNF-α) were observed and compared between the two groups before and after treatment, and the clinical efficacy of the two groups was evaluated. Results: After treatment, the VAS score, TCM symptom score, and serum IL-6, IL-1β, and TNF-α levels decreased in both groups (P P P P P Conclusions: The hot and humid compress of traditional Chinese medicine can effectively relieve pain, restore lumbar function, improve TCM syndromes, reduce the level of inflammatory factors, and have a curative effect in treating LDH.

Clinical Observation of the Therapeutic Effects of Wenzhong Hewei Formula in Treating Spleen and Stomach Qi Deficiency Syndrome in Internal Medicine Diseases

Objective:To observe the clinical efficacy and safety of Wenzhong Hewei Formula in treating spleen and stomach qi deficiency syndrome in internal medicine diseases.Methods:Sixty patients with spleen and stomach qi deficiency syndrome admitted to the hospital from April 2022 to June 2023 were randomly divided into observation and control groups,with 30 patients in each group.The control group received conventional internal medicine treatment,while the observation group was additionally treated with Wenzhong Hewei Formula on the basis of conventional treatment.Both groups were treated for 4 weeks.Results:The total effective rate of treatment in the observation group was higher than that of the control group(P<0.05).After treatment,the traditional Chinese medicine syndrome scores of both groups were significantly lower than before treatment,with the observation group showing a more pronounced reduction(P<0.05).There was no statistically significant difference in the incidence of adverse reactions between the two groups(P>0.05).Conclusion:Wenzhong Hewei Formula can effectively improve clinical symptoms in patients with spleen and stomach qi deficiency syndrome,enhance clinical efficacy,and have a high level of safety,making it worthy of clinical promotion.

Molecule‑Level Multiscale Design of Nonflammable Gel Polymer Electrolyte to Build Stable SEI/CEI for Lithium Metal Battery

The risk of flammability is an unavoidable issue for gel polymer electrolytes(GPEs).Usually,flameretardant solvents are necessary to be used,but most of them would react with anode/cathode easily and cause serious interfacial instability,which is a big challenge for design and application of nonflammable GPEs.Here,a nonflammable GPE(SGPE)is developed by in situ polymerizing trifluoroethyl methacrylate(TFMA)monomers with flame-retardant triethyl phosphate(TEP)solvents and LiTFSI–LiDFOB dual lithium salts.TEP is strongly anchored to PTFMA matrix via polarity interaction between-P=O and-CH_(2)CF_(3).It reduces free TEP molecules,which obviously mitigates interfacial reactions,and enhances flame-retardant performance of TEP surprisingly.Anchored TEP molecules are also inhibited in solvation of Li^(+),leading to anion-dominated solvation sheath,which creates inorganic-rich solid electrolyte interface/cathode electrolyte interface layers.Such coordination structure changes Li^(+)transport from sluggish vehicular to fast structural transport,raising ionic conductivity to 1.03 mS cm^(-1) and transfer number to 0.41 at 30℃.The Li|SGPE|Li cell presents highly reversible Li stripping/plating performance for over 1000 h at 0.1 mA cm^(−2),and 4.2 V LiCoO_(2)|SGPE|Li battery delivers high average specific capacity>120 mAh g^(−1) over 200 cycles.This study paves a new way to make nonflammable GPE that is compatible with Li metal anode.

Constructing Donor–Acceptor‑Linked COFs Electrolytes to Regulate Electron Density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal batteries.This study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(COFs)based on intramolecular charge transfer interactions.Unlike other reported COFbased solid-state electrolyte,the developed concept with D–A-linked COFs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal batteries.The introduced strong electronegativity F-based ligand in COF electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based ligands.This is ascribed to outstanding D–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances Li^(+)kinetics.Consequently,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through D–A system.

CLINICAL REPORT ON MULTI-CENTER RANDOMIZED CONTROLLED TRIAL OF TREATMENT OF MIGRAINE BY ELECTRO-ACUPUNCTURE AT QI■X■(丘墟GB40)

Objective To observe the therapeutic effect of electro acupuncture at QIǖXǖ（丘墟GB40） for treating migraine and provide clinical study for Acupoints Dictionary of People＇s Republic of China. Methods Multi-center （3 First-Class hospitals） study was adopted, and the involved 3 hospitals did clinical observation according to the requirements of the project. The methods are as follows. All cases were randomized into treatment group and control group according to their sequence. QIǖXǖ（丘墟GB40） was selected in treatment group, while Tiānshū （天枢 ST25） was selected in control group. Both groups were performed electro acupuncture, and syndromes indexes of migraine and 5-HT were observed before and after treatment. All data were analyzed by statistic software SPSS11.5. Results There was significant difference of VAS margin between two groups in each center and the combined center （u= -3. 362, P=0. 001 ）. There was significant difference of therapeutic effect of 4-week treatment between two groups in each clinical center and the combined center. The therapeutic effect of 3-month treatment between two groups in No. 1 and No. 3 hospitals, showed significant difference, the treatment group was better; while that of No. 2 hospital had no obvious difference. The therapeutic effect of 6-month treatment between two groups in each center and the combined center had significant difference, the treatment group was better. Conclusion The therapy of electro acupuncture at QIǖXǖ（丘墟GB40） is effective for migraine.

2023年LIS期刊论文研究方法应用态势

研究方法的选择和运用影响研究的深度和可靠性,对科学研究发展十分重要。文章在总结LIS领域方法论研究的基础上,将LIS领域常用的研究方法整理、汇总、编码,以LIS领域11种TOP期刊2023年收录的论文为数据源,统计分析LIS期刊论文的研究方法应用态势,探讨LIS学科性质、研究对象、作者学科背景等因素对研究方法的影响。研究发现:LIS领域论文使用的研究方法内容不断演进,跨学科和新兴理论方法以及多元研究方法的应用促进了研究的深入和丰富。

锂玻璃探测器^(6)Li原子数标定

在聚变包层中子学性能的实验检验中,造氚率是重要的测量参数之一,探测器中^(6)Li原子数目作为计算造氚率的归一化因子,是决定测量结果精度的关键因素,必须进行精确标定。对^(6)Li原子数标定原理、实验配置及过程、不确定度量化方法进行具体介绍,并首次在中国绵阳研究堆(CMRR)的M5水平孔道以锗单晶单色器获得32.36 meV中子对小型锂玻璃探测器中^(6)Li原子数进行了标定,不确定度为2.62%。

热处理对Mg-3Sn-2Al-1Zn-5Li合金耐蚀性能的影响

对Mg-3Sn-2Al-1Zn-5Li合金进行了不同方式的热处理。利用电化学测试研究了不同热处理状态合金在3.5%NaCl溶液中的腐蚀电化学行为,并通过扫描电镜、能谱以及X射线衍射分析了合金腐蚀形貌及腐蚀产物的成分。结果表明:经固溶处理和时效处理后,合金的耐蚀性能有所提高,并且固溶态的Mg-3Sn-2Al-1Zn-5Li合金有着最佳的耐蚀性能;合金的腐蚀特征为丝状腐蚀,腐蚀产物主要为Mg(OH)_(2)。

电流密度、温度、阴极孔隙率和N_(2)溶解度因子对Li-N_(2)电池放电性能的影响

Li-N_(2)电池是一种具有电化学固氮功能的新型储能系统,文章利用有限元软件COMSOL耦合多物理场建立的电化学模型能揭示各因素对其放电性能的影响。模拟结果表明:放电电流密度、温度、阴极孔隙率和电解液中的N_(2)溶解度因子对Li-N_(2)电池的放电性能均有影响;较大的放电电流密度会降低该电池的电压和容量;阴极孔隙率和电解液中的N_(2)溶解度因子是影响该电池电压和容量的关键性因素,提高阴极孔隙率和电解液中的N_(2)溶解度因子均能增加该电池的电压和容量;电池放电的平台电压随温度升高而升高,但放电容量几乎不受温度影响。

基于铁锈红和废锂箔制备LiFePO_(4)/C正极材料的储锂性能

磷酸铁锂电池的需求大、市场垄断而导致原材料价格日益高涨。以铁锈红和废锂箔为原材料,采用磷酸铁工艺制备了LiFePO_(4)/C粉末,并测试其电化学储锂性能。结果表明:LiFePO_(4)/C粉末由粒径尺寸为110~400nm的颗粒组成,在1.0C循环350圈后的可逆比容量和容量保持率分别为129.7mAh/g和98.0%,与商业LiFePO_(4)正极材料性能相当。可见,该结果降低了LiFePO 4的制备成本,有利于循环经济和可持续发展。

A 1000-year record of Mg/Li and Li/Ca ratios of ostracod shells in Lake Qinghai,NE Tibetan Plateau

1 Introduction Lake Qinghai,famous as the largest inland saline lake in China,located on the high-altitude northeastern Tibetan Plateau,and four junctional zones of the East Asian summer monsoon(EASM),Indian summer monsoon(ISM),East Asian winter monsoon and the westerly jet stream prevail,making it sensitive to global climate change

Plasma L-ENK, AVP, ANP and serum gastrin in patients with syndrome of Liver-Qi-stagnation

AIM To investigate the pathophysiologic basis of syndrome of Liver Qi stagnation and parameters for clinical differentiation. METHODS Plasma L ENK, AVP, ANP and serum gastrin were determined by RIA in 84 patients with neurasthenia, mastodynia, chronic gastritis, and chronic cholecystitis presenting the same syndrome of Liver Qi stagnation in traditional Chinese medicine (TCM). Healthy subjects served as controls in comparison with patients having the same syndrome but with different diseases. RESULTS Among the patients with Liver Qi stagnation, the plasma L ENK, ANP and gastrin levels were 38 83ng/L ± 6 32ng/L , 104 11ng/L ± 29 01ng/L and 32 20ng/L ± 6 68ng/L , being significantly lower than those in the healthy controls ( t =3 34, 6 17, 4 48; P <0 01). The plasma AVP of the patient group ( 52 82ng/L ± 19 09ng/L ) was significantly higher than that of the healthy controls ( t =5 79, P <0 01). The above changes in patients having the same symptom complex but different diseases entities showed no significant differences, P >0 05. CONCLUSION The syndrome of Liver Qi stagnation is closely related to the emotional modulatory abnormality of the brain, with decrease of plasma L ENK, ANP and gastrin, and increase of plasma AVP as the important pathophysiologic basis.

有源层厚度对Li-ZTO TFT电学性能的影响

本研究旨在制备Li-ZTO单有源层薄膜晶体管,并研究有源层厚度对其性能的影响。该研究采用磁控溅射方法,使用Li-ZTO靶材制备出了有源层厚度分别为70 nm,90 nm,110 nm的器件。采用了X射线光电子能谱(XPS)、原子粒显微镜(AFM)、X射线衍射仪(XRD)等设备对制备出的Li-ZTO薄膜进行测试分析。通过对不同有源层厚度的薄膜物质组成、表面形貌、晶粒生长情况的测试分析,进一步研究了有源层厚度对Li-ZTO薄膜性能的影响。除此之外,我们还利用半导体参数仪对Li-ZTO的电学性能进行了测试。结果表明,过厚的有源层将影响电荷传输,增加散射中心,影响器件性能。因此,有源层厚度为70 nm的Li-ZTO具有最好的性能,包括12.33 cm^(2)/vs的饱和迁移率、0.66 V的阈值电压、2.12 V/dec的亚阈值摆幅以及>10~8的开关比。

化浊解毒活血方对慢性萎缩性胃炎伴随肠上皮化生患者PG、PGR、LI-CD的影响

目的探讨化浊解毒活血方对慢性萎缩性胃炎(CAG)伴肠上皮化生患者血清胃蛋白酶原(PG)、胃蛋白酶原比值(PGR)及胃黏膜中肝肠钙黏连蛋白(LI-CD)表达的影响。方法采用随机数字表法,将2016年1月—2017年12月在河北省中医院脾胃病科诊治的120例CAG伴肠上皮化生患者分为中药组和中成药组,每组60例。中药组口服化浊解毒活血方(1剂/d,分2次温服),中成药组口服摩罗丹(每次8丸,3次/d),2组疗程均为6个月。比较2组患者治疗前后胃镜像病情程度、病理(炎症、腺体萎缩、肠上皮化生)变化程度、血清PG水平、PGR和胃黏膜肠化生组织中LI-CD阳性表达情况。结果治疗后,2组胃镜像和炎症、腺体萎缩、肠上皮化生程度均较治疗前明显改善(P均<0.05),且中药组的改善情况均明显优于中成药组(P均<0.05)。治疗后,2组血清PGⅠ水平和中药组PGR均较治疗前明显升高(P均<0.05),2组血清PGⅡ水平和中成药组PGR与治疗前比较差异均无统计学意义(P均>0.05);治疗后中药组血清PGⅠ和PGⅡ水平均明显高于中成药组(P均<0.05)。治疗后,2组胃黏膜肠化生组织中LI-CD阳性表达平均光密度值均较治疗前明显降低(P均<0.05),且中药组明显低于中成药组(P<0.05)。结论化浊解毒活血方能有效改善CAG伴肠上皮化生患者的病理表现,可能与其提升血清PGI水平,下调LI-CD在胃黏膜的表达有关。

Sc对铸造Al-Li合金组织及力学性能的影响

铸造Al-Li合金可用于成型复杂薄壁构件,在航空航天、国防军工等领域具有广阔的应用前景。细化铸造Al-Li合金组织,提高合金强塑性对其实际应用具有重要意义。本文通过金属型铸造制备不同Sc含量的Al-2Li-2Cu-0.5Mg-xSc合金,分析了Sc含量对合金组织及力学性能的影响规律。结果表明,随着Sc含量逐渐增加,合金晶粒由树枝晶向近等轴晶转变,晶粒尺寸逐渐减小。δ'(Al_(3)Li)相倾向于以Al_(3)Sc相为形核核心,形成Al_(3)(Li, Sc)复合粒子,这些粒子在变形过程中不易被位错切过,减少了Al_(3)Li粒子引起的共面滑移。当添加0.3%Sc(质量分数)时,合金具有较好的综合力学性能,经过175℃/32 h的峰值时效处理后,屈服强度、抗拉强度和伸长率分别可以达到381.3 MPa、449.5 MPa和5.8%。

The Effect of TCM Herbs on Mitochondrial Functions: The Linkage between Qi and Mitochondria

The linkage between Qi and mitochondria was investigated by exploring the effect of Traditional Chinese Medicine (TCM) Qi-invigorating herbs on mitochondrial function at the biochemical and molecular levels. Three Chinese herbs (Astragali radix, Herba cistanche, Panax ginseng) were used to treat cultured mouse kidney cells and the generation of adenosine triphosphate (ATP) was measured. The Qi-invigorating herb, Astragali radix, was selected for further study using additional biological and molecular parameters, including ATP, reactive oxygen species (ROS), mitochondrial membrane potential (MMP), mtDNA copies, superoxide dismutase (SOD), glutathione (GSH), cell growth, cell viability and transcriptomes. We also chose two concentrations of Astragali radix to study the hormetic effect. The results indicated that: 1) Qi-invigorating herbs have significant effects on the function of mitochondria, with ATP production and the antioxidant capacity being significantly enhanced, and ROS levels being reduced, allowing for a more optimal oxidation environment. The effect of the herbs followed a hormetic curve with a stimulating effect at lower doses but an inhibiting effect at high doses;2) The growth of the cells was not affected despite numerous biochemical changes associated with mitochondrial function, indicating the powerful ability of mitochondria to maintain cellular homeostasis;3) The up-regulation of NOCT gene, related to nicotinamide adenine dinucleotide (NADH) synthesis, offers a molecular basis for the ATP-promoting effect of the Qi-invigorating herbs. This work provides additional insight into the efficacy of TCM herbs from a western perspective.

察尔汗北部东陵湖Li、B资源分布特征与物质来源

柴达木盆地盐湖锂、硼资源是青海省建设世界级盐湖产业基地的重要资源组成部分,盆地内接续性锂、硼资源储量的增加意义重大。柴达木盆地东南部的察尔汗盐湖锂、硼资源差异分布明显,位于察尔汗盐湖北部的东陵湖,近两年勘查工作揭露其湖表卤水和湖区晶间卤水LiCl品位(315.16 mg/L)和B_(2)O_(3)品位(429.32 mg/L)均超过边界品位。本文以东陵湖湖表卤水、钻孔晶间卤水、承压卤水、浅层钻孔(0~8 m)盐类沉积物为研究对象,分析研究了东陵湖不同卤水和钻孔沉积物的锂、硼含量特征,并与察尔汗盐湖锂、硼含量分布特征对比,结合盆地补给河流和尾闾盐湖的Li^(+)含量和δ^(11)B值,分析了东陵湖锂、硼资源元素分布特征与物质来源,主要得出如下结论:①东陵湖湖表卤水(61.91 mg/L)和湖区钻孔晶间卤水(27.05 mg/L)的Li^(+)含量最高,而与察尔汗盐湖别勒滩区段(204.48 mg/L)相比,其Li含量低3.3~7.6倍;东陵湖湖表卤水的B^(3+)平均含量为177.25 mg/L,钻孔晶间卤水和承压卤水的B^(3+)平均含量为81.65 mg/L,较之察尔汗盐湖,东陵湖不同卤水硼含量普遍较高。②东陵湖11个钻孔沉积物样品Li^(+)含量介于1×10^(-6)~8.24×10^(-6)之间,B3+含量在0.005%~0.024%之间,湖区钻孔沉积物锂含量高于凹地钻孔;钻孔沉积剖面石盐层和碎屑层沉积物Li、B含量无明显变化。③东陵湖与察尔汗盐湖锂、硼含量空间分布差异明显,东陵湖较察尔汗盐湖别勒滩区段明显贫锂,较达布逊、察尔汗和霍布逊区段更富硼,总体表现为富硼贫锂的特征。④东陵湖δ^(11)B介于+20.33‰~+29.17‰之间,平均为+24.23‰,与柴北缘补给河流和Ca-Cl水补给形成的盐湖均位于高δ^(11)B端元区,结合东陵湖不同卤水样品的Ca^(2+)与Li^(+)、B^(3+)相关性研究,认为东陵湖锂、硼资源元素与含盐溶质具有相似的物源,高硼低锂的元素分布特征和高δ^(11)B值显示东陵湖地区水文补给来源与柴北缘水文体系有关,主要物质来源受察尔汗盐湖北部断裂带Ca-Cl水的补给。

Based on the Theory of Five Yun Six Qi to Study the Clinical Effect of Chaigui Decoction on Jueyin Type Hypertension

[Objectives]To study the clinical effect of Chaigui decoction(CGD)on Jueyin type hypertension based on the theory of Five Yun Six Qi.[Methods]52 patients with Jueyin type hypertension in Wuxi Hospital Affiliated to Nanjing University of Chinese Medicine from January,2020 to March,2021 were randomly divided into Western medicine control group(18 cases)and CGD group(34 cases).CGD group was treated with CGD,while the control group was treated with irbesartan or amlodipine.[Results]After treatment,the systolic blood pressure(SBP)of the two groups decreased significantly,the difference was statistically significant(P<0.05).After treatment,the diastolic blood pressure(DBP)of CGD group was significantly lower than that of the control group(P<0.05).[Conclusions]Based on the theory of Five Yun Six Qi,CGD has significant effect on Jueyin type hypertension,and the effect of reducing DBP is better than that of Western medicine control group.

“Warming yang and invigorating qi” acupuncture alters acetylcholine receptor expression in the neuromuscular junction of rats with experimental autoimmune myasthenia gravis

Myasthenia gravis is an autoimmune disorder in which antibodies have been shown to form against the nicotinic acetylcholine nicotinic postsynaptic receptors located at the neuromuscular junction.＂Warming yang and invigorating qi＂ acupuncture treatment has been shown to reduce serum inflammatory cytokine expression and increase transforming growth factor beta expression in rats with experimental autoimmune myasthenia gravis.However,few studies have addressed the effects of this type of acupuncture on the acetylcholine receptors at the neuromuscular junction.Here,we used confocal laser scanning microscopy to examine the area and density of immunoreactivity for an antibody to the nicotinic acetylcholine receptor at the neuromuscular junction in the phrenic nerve of rats with experimental autoimmune myasthenia gravis following ＂warming yang and invigorating qi＂ acupuncture therapy.Needles were inserted at acupressure points Shousanli（LI10）,Zusanli（ST36）,Pishu（BL20）,and Shenshu（BL23） once daily for 7 consecutive days.The treatment was repeated after 1 day of rest.We found that area and the integrated optical density of the immunoreactivity for the acetylcholine receptor at the neuromuscular junction of the phrenic nerve was significantly increased following acupuncture treatment.This outcome of the acupuncture therapy was similar to that of the cholinesterase inhibitor pyridostigmine bromide.These findings suggest that ＂warming yang and invigorating qi＂ acupuncture treatment increases acetylcholine receptor expression at the neuromuscular junction in a rat model of autoimmune myasthenia gravis.