Interface engineering strategy via electron-defect trimethyl borate additive toward 4.7 V ultrahigh-nickel LiNi_(0.9)Co_(0.05)Mn_(0.05)O_(2)battery

The Li metal battery with ultrahigh-nickel cathode(LiNi_(x)M_(1-x)O_(2),M=Mn,Co,and x≥0.9)under high-voltage is regarded as one of the most promising approaches to fulfill the ambitious target of 400 Wh/kg.However,the practical application is impeded by the instability of electrode/electrolyte interface and Ni-rich cathode itself.Herein we proposed an electron-defect electrolyte additive trimethyl borate(TMB)which is paired with the commercial carbonate electrolyte to construct highly conductive fluorine-and boron-rich cathode electrolyte interface(CEI)on LiNi_(0.9)Co_(0.05)Mn_(0.05)O_(2)(NCM90)surface and solid electrolyte interphase(SEI)on lithium metal surface.The modified CEI effectively mitigates the structural transformation from layered to disordered rock-salt phase,and consequently alleviate the dissolution of transition metal ions(TMs)and its“cross-talk”effect,while the enhanced SEI enables stable lithium plating/striping and thus demonstrated good compatibility between electrolyte and lithium metal anode.As a result,the common electrolyte with 1 wt%TMB enables 4.7 V NCM90/Li cell cycle stably over 100 cycles with 70%capacity retention.This work highlights the significance of the electron-defect boron compounds for designing desirable interfacial chemistries to achieve high performance NCM90/Li battery under high voltage operation.

Preparation, characterization and in vivo evaluation of alginate-coated chitosan and trimethylchitosan nanoparticles loaded with PR8 influenza virus for nasal immunization

For efficient mucosal vaccine delivery, nanoparticulate antigens are better taken by microfold cells in the nasal associated lymphoid tissue and also dendritic cells. Nanoparticles based on polymers such as chitosan(CHT) and its water soluble derivative, trimethylchitosan(TMC), could be successfully used as carrier/adjuvant for this purpose. Sodium alginate, a negatively charged biopolymer, could modify the immunostimulatory properties of CHT and TMC NPs and increase their stability. Sodium alginate(ALG)-coated chitosan(CHT)and trimethylchitosan(TMC) nanoparticles(NPs) loaded with inactivated PR8 influenza virus were successfully prepared by direct coating of the virus with CHT or TMC polymers to evaluate their immunoadjuvant potential after nasal immunization. After nasal immunizations in BALB/c mice, PR8-CHT formulation elicited higher IgG2 a and Ig G1 antibody titers compared with PR8-TMC. ALG coating of this formulation(PR8-CHT-ALG) significantly decreased the antibody titers and a less immune response was induced than PR8-TMC-ALG formulation. PR8-TMC-ALG formulation showed significantly higher Ig G2 a/Ig G1 ratio, as criteria for Th1-type immune response, compared with PR8-CHT-ALG and PR8 virus alone. Altogether, the PR8-TMC-ALG formulation could be considered as an efficient intranasal antigen delivery system for nasal vaccines.

Association of (S)-Isoserine Derivatives and 2,2,4-Trimethyl-3-hydroxy-4-cyclohexenecarboxylate

Two novel compounds（4a and 4b） were obtained by the association of 2,2,4-trimethyl-3-hydroxy-5-cyclohexenecarboxylate with （S） -isoserine derivatives. The space location of the hydroxyl group of compound 1 was identified via the formation of lactone 6. Fe2 （SO4）3·xH2O was used as the catalyst for the synthesis of lactone 6. The carboxyl group was selectively protected with diazomethane. All the products were characterized via ^1H NMR and mass spectra. The Docking study showed that the associations have the potential therapeutic use of DPP-Ⅳ inhibitor.

Densities of methanol+trimethyl phosphate binary mixtures from (293.15 to 333.15)K and viscosities of trimethyl phosphate from (283.15 to 373.15)K

Densities of methanol＋trimethyl phosphate binary mixtures were measured over a temperature range of （293.15 to 333.15）K at atmospheric pressure. From these data, excess molar volume（VE） was calculated. Viscosities of trimethyl phosphate were also measured over a temperature range of （283.15 to 373.15）K and the data were fitted to the Andrade equation. The density data were fitted to a second-order polynomial. The excess molar volumes were fitted to the Redlich-Kister equation using a nonlinear regression method. Results show that the density and viscosity gradually decreases with the increase of temperature.

THE REACTION OF SUBSTITUTED PHENOXY ACETYL CHLORIDE WITH TRIMETHYL PHOSPHITE

Substituted phenoxy acetyl chloride reacted with trimethyl phosphite to form an unexpected substituted phenoxy acetic acid ester, confirmed by ~1HNMR, IR and MS. The mechanism suggested is different from that of Arbuzov reaction.

Antibacterial Properties of Starch Blending with Glycidyl Trimethyl Ammonium Chloride and Potassium Sorbate Used in Medical Dressings

Starch is easy to breed bacteria,which affects its performance and application in medical dressings.In this research,antibacterial starch was prepared by physical blending method with glycidyl trimethyl ammonium chloride(GTA)and potassium sorbate as antibacterial agents.The antibacterial activities of GTA,potassium sorbate,GTA-starch and potassium sorbate-starch were investigated with the purpose of understanding the growth of bacteria in starch system.Results showed that GTA had good antibacterial activity,and the bacteriostasis rate of 0.05 g/mL GTA against Staphylococcus aureus(S.aureus)was 96.55%.The antibacterial properties of starch increased with an increase of mass fraction of potassium sorbate and then decreased with the continuously increasing of mass fraction of GTA.GTA-starch with30%GTA showed the best antibacterial activities,the bacteriostasis rate of Escherichia coli(E.coli)and S.aureus were 26.48%and20.26%,respectively;50%potassium sorbate in potassium sorbatestarch showed the best antibacterial activities,the bacteriostasis rate of E.coli and S.aureus were 67.68%and 74.75%,respectively.

STUDY AND APPLICATION OF SPECTROPHOTOMETRIC DETERMINATION OF MICRO AMOUNTS OF BISMUTH WITH MESO—TETRAKIS—(4—N—TRIMETHYL AMMONIUMPHENYL)PORPHINE

A new highly sensitive spectrophotometric method has been developed for the determination of micro amounts of bismuth (Ⅲ), based on the formation of Bi (Ⅲ)—meso—tetrakis—(4—N—trimethylammonium phenyl) porphine [T (4TMAP) P] complex. In the presence of Cd (Ⅱ), Bi(Ⅲ) reacts almost instantaneously with T (4TMAP)P in a 0. 6 mol/l NaAc—HAC buffer (PH5.8) at room temperature. The composition of the complex is T(4TMAP)P: Bi=1:1. The absorbance complex obeys Beer's law over the Bi(Ⅲ) concentration range 0.1—1.4 μg/ml. The linear relative coefficient γ is 0.9998. The apparent molar absorptivity was 1.75×10~5 1. mol^(-1). cm^(-1) at 463nm. The relative standard deviation of the method is 1.50％ for Bi(Ⅲ) 7ug/10ml (10 determinations). The interference of foreign ions has been examined. This simple and rapid method can be applied to the assay of Bi(Ⅲ) in some tablets directly.

Plasma Surface Functionalization of Biaxially Oriented Polypropylene Films with Trimethyl Borate

The radiofrequency plasma (13.56 MHz) was employed to polymerize trimethyl borate (TMB) monomer/N2 gas mixture on the surface of biaxially oriented polypropylene (BOPP) films. Plasma polymer coated polypropylene films were examined by flame retardancy test (limiting oxygen index, LOI). The highest LOI value calculated for the untreated BOPP sample was 18.4 (v/v O2%) and 24.2 (v/v O2%) for the 55 W 30 minutes treated sample. The plasma polymers were characterized by FTIR spectroscopy and AFM. According to the FTIR results, the -OH, B-CH3, B-O, and BH2 functional groups were detected. It was found that the highest surface roughness belonged to 40 W 30 min treated BOPP sample which was calculated as 9.78 nm (10 μm × 10 μm). Moreover, the wettability of the modified BOPP film surfaces was characterized via contact angle measurements. The water contact angle values have decreased from 109.6? to the lowest value of 68.2? after the plasma treatment. The results showed that TMB/N2 plasma modification could be used as an alternative method for the enhancement of flame retardancy and hydrophilicity of BOPP film.

ZMYND10 downregulates cyclins B1 and D1 to arrest cell cycle by trimethylating lysine 9 on histone 3

The BLU gene coding for zinc finger,MYND-type containing 10(ZMYND10)protein is mapped on chromosomal region 3p21.It is frequently lost in some kinds of cancers due to hypermethylation on its promoter region and identified as a tumour suppressor gene.The underlying mechanisms for BLU-mediated tumor suppression remain unclear.BLU has been reported to disturb cell cycle progression.The present study aims at examining whether ZMYND10 prevents progression of the cell cycle by targeting to repressive histone marks and downregulating the level of cyclins.Proteins structurally similar with ZMYND10 have been shown to recognize DNA sequence upstream of coding portion of the gene encoding cell cycle regulators.Enzymes,notably demethylases modifying the lysine residues are over-expressed line oncoproteins,and targeted in anti-cancer therapy.BLU was re-expressed in H1299 and HepG2 cells.The level of cyclin D1,cyclin B1 and trimethylate lysine 9 on histone 3(H3K9me3)and the binding of BLU with SIN3A(a component of the co-repressor)were detected.Cell cycle profile was measured.The evolutionary relationship between ZMYND10 and other ZMYND proteins was analysed by phylogenetic tree construction.We found that BLU expression induced G1 arrest in H1299 cells,and induced G1/G2 arrest in HepG2 cells.Cell cycle arrest was correlated with reduced activities and levels of cyclins;cyclin D1 was downregulated in H1299 cells;Both cyclin B1 and D1 were downregulated in HepG2 cells;and that BLU was associated with SIN3A.In both cell lines,the expression of H3K9me3 was induced.BLU was clustered with histone methyltransferase SMYD3 and SMYD1 on the same clade of the deduced phylogenetic tree.The results thus suggested that ZMYND10 encoded by BLU inhibited cyclins activity to prevent cell cycle progression through interaction with repressors and histone repressive marks to block the expression of genes coding for cyclins.

Non-flammable electrolytes based on trimethyl phosphate solvent for lithium-ion batteries

The properties of trimethyl phosphate（TMP）-based nonflammable electrolytes with LiPF6 as solute were investigated using graphite anode and LiCoO2 cathode. The effect of TMP on non-flammability of electrolytes was also evaluated. It is found that the TMP reduction decomposition on graphite electrode at the potential of 1.3V （vs Li/Li+） is suppressed with ethylene carbonate（EC）, dimethyl carbonate（DMC） and ethylmethyl carbonate（EMC） cosolvents and vinylene carbonate（VC） additives. The results show that the non-flammable electrolyte of 1mol/L LiPF6 61%（EC1.5-DMC1.0-EMC1.0）-39% TMP has good electrochemical properties. The discharge capacities of half-cells after 20 cycles are 254.8mA·h/g for Li/graphite and 144.1mA·h/g for Li/LiCoO2. The （graphite/）（LiCoO2） prismatic lithium-ion cell delivers a discharge capacity of 131mA·h/g at first cycle. With an addition of 4%VC to this non-flammable electrolyte, a discharge capacity of 134mA·h/g at first cycle and a capacity ratio of （84.3%） after 50 cycles are obtained for prismatic lithium-ion batteries. Furthermore, a nail penetration test demonstrates that the safety of prismatic lithium-ion batteries is dramatically improved by using TMP-containing （non-）（flammable） electrolytes.

The Activity and Theoretical Interpretation of Role of Trimethyl Phosphite Modified HZSM-5 Zeolite

The catalytic activity of trimethyl phosphite modified HZSM-5 zeolite and un-modified HZSM-5zeolite treated with 100% steam at 673,773,873,973 and 1073K, respectively, were investigated using heptanecracking as a probe reaction. The results showed that the heptane conversion of both trimethyl phosphitetreated samples and un-phosphated samples decreased with an increase in treating temperature, but trimethylphosphite modified samples showed higher activity in comparison with the un-modified samples, which weresteam-treated at a higher temperature. The results were firstly elucidated by the model cluster method andcomputational quantum chemistry method. Full optimization and frequency analysis of all cluster model havebeen carried out using the Gaussian 94 software-package with the PM 3 semi-empirical method performed onsmall cluster models. The computational results showed that the dealumination of trimethyl phosphite modi-fied zeolite model cluster was more difficult than that of un-modified zeolite model cluster when they weretreated with steam while investigating the heat of reaction.

接枝交联双重改性淀粉IStD絮凝性能研究

以玉米淀粉(St)为原料,环氧氯丙烷(EPI)为交联剂,甲基丙烯酰氧乙基三甲基氯化铵(DMC)为接枝单体,两步法合成了接枝交联双重改性淀粉基絮凝剂IStD。测试了投药量、pH、高岭土质量分数、絮凝温度和絮凝时间对IStD絮凝性能的影响。结果表明,当高岭土质量分数为2%,投药质量浓度为14 mg/L,pH=7,絮凝温度为25℃,絮凝时间为1 h时,上清液的透光率可达91.7%。通过观察投药前后水体中高岭土颗粒的分散状态,初步探讨了IStD的絮凝机理。结果表明在絮凝过程中,同时存在电中和与吸附架桥作用,以电中和作用为主。当IStD和CPAM复配用于处理生活废水时,透光率和COD去除率都能达到90%以上,具有一定的实用价值。

丙烯酰胺/甲基丙烯酰氧乙基三甲基氯化铵的水分散聚合物制备

以丙烯酰胺(AM)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为共聚单体,过硫酸铵为引发剂,自制聚甲基丙烯酰氧乙基三甲基氯化铵(PDMC)为分散剂,在硫酸铵水溶液中采用水分散聚合法,制备了丙烯酰胺/甲基丙烯酰氧乙基三甲基氯化铵共聚水分散体.考察了分散聚合过程中体系黏度变化,引发剂用量、硫酸铵的用量、分散剂的用量对共聚物黏度、分子量、颗粒尺寸的影响,并对其结构进行了鉴定.实验发现,在30℃,AM、DMC总单体质量分数为15%,DMC与AM物质的量比为1∶9,过硫酸铵浓度范围为0.70×10^(-4)~2.8×10^(-4)mol/L,硫酸铵质量分数范围为26.51%~28.1%,分散剂PDMC质量分数范围为1.1%~1.3%条件下,可以制备出黏度低、稳定性好的丙烯酰胺/甲基丙烯酰氧乙基三甲基氯化铵共聚水分散体.

胃癌组蛋白H3第4位赖氨酸的三甲基化修饰相关长链非编码RNA预后模型的构建与验证

目的探索胃癌组蛋白H3第4位赖氨酸的三甲基化(trimethylation of lysine4 on histone H3,H3K4me3)修饰相关长链非编码RNA(long non-coding RNA,LncRNA)特征,构建相关预后模型并预测胃癌免疫治疗疗效。方法从癌症基因组图谱数据库下载胃癌相关转录组测序数据和对应的患者临床资料,通过构建H3K4me3相关调节因子基因与LncRNA的共表达网络识别H3K4me3修饰相关LncRNA,并将癌症基因组图谱数据库中370例符合筛选标准的胃癌患者样本(整体组)按1:1随机抽样划分为训练组(n=185)和验证组(n=185)。随后基于单因素Cox回归、Lasoo回归分析构建H3K4me3相关LncRNA预后风险评分模型并进行内部验证。Kaplan-Meier生存分析和受试者操作特征曲线(receiver operating characteristic curve,ROC曲线)被用于验证模型的预测性能。通过单因素和多因素Cox回归分析评估风险评分等临床指标的预后预测价值。结合风险评分、年龄和肿瘤TNM分期构建预测胃癌患者总生存率的列线图模型,ROC曲线与校准图被用于评估列线图的预测准确性。借助共识聚类识别异质性聚类亚群并进行免疫治疗疗效预测。结果基于共表达网络关系识别了14个具有预后价值的H3K4me3相关LncRNA并构建了相关风险模型及评价体系。根据训练组预后风险评分模型获得的中位风险评分将训练组、验证组和整体组胃癌患者划分为高、低风险,Kaplan-Meier生存曲线显示低风险患者的总体生存情况要优于高风险患者(P<0.05)。此外,该模型在训练组中预测胃癌患者1、3、5年总生存率的曲线下面积(area undercurve,AUC)分别为0.708、0.730、0.770,在验证组中分别为0.690、0.648、0.713,而在整体组中分别为0.697、0.670、0.724。多因素Cox回归分析显示基于H3K4me3相关LncRNA构建的风险评分模型是预测胃癌患者预后的独立因素(P<0.001)。构建的列线图预测胃癌患者1、2、3年总生存率的AUC分别为0.727、0.780、0.717,且其校准曲线与理想曲线相接近。基于共识聚类算法进一步识别了2种具有异质性免疫特征的H3K4me3-LncRNA亚群,其中亚组Ⅱ具有更高的免疫细胞浸润水平和更强的免疫应答潜力,并对5-氟尿嘧啶、奥沙利铂等显示出更高的药物敏感性,而亚组I则可能对磷脂酰肌醇3-激酶特异性抑制剂具有更高的敏感性。结论本研究构建了一个H3K4me3-LncRNA风险评分模型以预测胃癌患者的预后,并揭示了其异质性微观特征及在预测免疫治疗疗效方面的潜在价值。

阻塞性睡眠呼吸暂停诱导肠道菌群失调与缺血性脑卒中:机制与研究进展

缺血性脑卒中作为一种高发病率、高死亡率、高致残率、高复发率的脑血管疾病,是导致我国中老年人残疾和死亡的重要原因。因此,识别与缺血性脑卒中相关危险因素并进行有效预防至关重要。有研究表明,阻塞性睡眠呼吸暂停是缺血性脑卒中发生的独立危险因素,但具体机制尚未明确。随着新一代测序技术的发展,研究发现阻塞性睡眠呼吸暂停可引起肠道菌群改变,而肠道菌群可能与缺血性脑卒中密切相关。因此,本文就阻塞性睡眠呼吸暂停诱导肠道菌群失调与缺血性脑卒中的相关机制进行综述,以期为阐明阻塞性睡眠呼吸暂停引起缺血性脑卒中的潜在病理机制提供依据。

5-溴-1-丙基-2,3,3-三甲基-3H-吲哚对甲苯磺酸盐的合成

本文探究合成5-溴-1-丙基-2,3,3-三甲基-3H-吲哚对甲苯磺酸盐。重点考察了反应物料比、溶剂量、反应温度和反应时间对实验结果的影响。实验结果表明:n(5-溴-2,3,3-三甲基-3H-吲哚)∶n(1-丙基对甲苯磺酸酯)=1∶15,邻二氯苯溶剂量=2V(5-溴-2,3,3-三甲基-3H-吲哚),110℃下保温反应4h,5-溴-1-丙基-2,3,3-三甲基-3H-吲哚对甲苯磺酸盐收率可达86%。

Arabidopsis PWWP domain proteins mediate H_3K_(27) trimethylation on FLC and regulate flowering time

LHP1 mediates recruitment of the PRC2 histone methyltransferase complex to chromatin and thereby facilitates maintenance of H3K27me3 on FLC, a key flowering repressor gene. Here, we report that the PWWP domain proteins （PDPs） interact with FVE and MSI5 to suppress FLC expression and thereby promote flowering. We demonstrated that FVE, MSI5, and PDP3 were co-purified with LHP1. The H3K27me3 level on FLC was decreased in the pdp mutants as welt as in the fve/ msi5 double mutant. This study suggests that PDPs function together with FVE and MSI5 to regulate the function of the PRC2 complex on FLC.

Syntheses,characterization,crystal structure and magnetic properties of copper(Ⅱ) α,β-unsaturated carboxylate complexes with trimethyl phosphate

Two ternary complexes Cu2A4[OP(OCH3)3]2 (A represents CH2=CH-COO- and CH2=C(CH3)-COO-) have been synthesized, and elemental analyses, IR, ESR, electronic reflectance spectra and magnetic studies were carried out. The single crystal X-ray diffraction shows that Cu2[CH2=C(CH3)-COO]4[OP(OCH3)3]2 is triclinic, with space group P1, a = 1.05128(13), b = 1.7559(5), c = 1.94479(3) nm, α =91.263(14)°,(β = 102.559(6)°,γ= 106.339(13)°, Z = 4 and R = 0.0668. Two copper(Ⅱ) atoms are bridged by four (a-methacrylate groups, and each copper(Ⅱ) atom is coordinated with a trimethyl phosphate molecule in the axial position, forming a distorted square pyramidal configuration. The symmetric center is between the two copper(Ⅱ) atoms, and the Cu-Cu bond distance is 0.26098(6) nm. The Cu-Cu distance and magnetic studies suggest that there exist anti-ferromagnetic interactions between the two copper(Ⅱ) atoms.