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阿戈美拉汀离子液体贴片的制备及体外透皮研究

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中南药学 2024年第4期22卷 908-913页

作者：杜卓芳符渝昕程泽能中南大学湘雅药学院长沙410000 湖南慧泽生物医药科技有限公司长沙410000

目的制备阿戈美拉汀离子液体透皮贴片并对其进行质量评价。方法通过药物析晶、体外释放和渗透情况选择处方所用辅料;通过离子交换反应制备阿戈美拉汀-多库酯离子液体,并采用傅里叶变换红外光谱和磁共振波谱对其进行表征;通过溶剂蒸发法... 详细信息

目的制备阿戈美拉汀离子液体透皮贴片并对其进行质量评价。方法通过药物析晶、体外释放和渗透情况选择处方所用辅料;通过离子交换反应制备阿戈美拉汀-多库酯离子液体,并采用傅里叶变换红外光谱和磁共振波谱对其进行表征;通过溶剂蒸发法制备透皮贴片,对离子液体贴片的含量均匀性、体外释放及体外渗透性能进行质量评价。结果阿戈美拉汀离子液体贴片制备后,表面光滑透明,重量面积比为167 g·m^(-2),单位面积含药量为2.5 mg·cm^(-2);含量均匀度符合药典标准;体外释放速率为(478.31±0.87)μg/(cm^(2)·h^(1/2));体外渗透速率为(24.38±3.93)μg/(cm^(2)·h);24 h的累计透过量为(545.86±93.08)μg·cm^(-2),透过率为(21.78±3.85)%。结论阿戈美拉汀离子液体通过增大贴片的载药量,显著提高贴片的透皮效果,使得透皮贴剂有望成为阿戈美拉汀的新型给药制剂。

关键词：阿戈美拉汀离子液体透皮贴片体外渗透试验

A Strong,Tough,and Self-Healing Strengthening Thioctic Acid-based Elastomer for Highly Reliable Flexible Strain Sensor

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Chinese Journal of Polymer Science 2024年第10期42卷 1610-1618,I0016页

作者： xin-yu Chen yu-Bing fu Xue-Ling Yan Lan Liu School of Materials Science and Engineering Key Lab of Guangdong Province for High Property and Functional Polymer MaterialsSouth China University of TechnologyGuangzhou510641China

Elastomers with high strength and toughness,excellent self-healing properties,and biocompatibility have broad application prospects in wearable electronics and other fields,but preparing it remains a *** this work,we propose a highly adaptable strategy by introducing the small molecule crosslinking agent of triethanolamine(TEA)to the poly(thioctic acid)(PTA)chains and preparing the PAx Ey elastomers using a simple synthesis *** strategy stabilizes the PTA chains by constructing multiple non-covalent cross-linked dynamic networks,endowing materials with excellent strength and toughness(tensile strength of 288 kPa,toughness of 278.2 kJ/m3),admirable self-healing properties(self-healing efficiency of 121.6%within 7 h at 70℃),and good *** PAx Ey elastomers can also be combined with MWNTs to become flexible strain sensors,which can be used to monitor human joint movements with high sensitivity,repeatable responses,and stability.

关键词： Thioctic acid Ion clusters Multiple dynamic networks Self-healing strengthening Flexible strain sensor

Effect of Al content in molten steel on interaction between MgO-C refractory and SPHC steel

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Journal of Iron and Steel Research International 2024年第4期31卷 838-848页

作者： fu-bin Gao fu-ming Wang Xiang Zhang Tian-yu Du xin-hua Wangg School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Handan Iron and Steel Company Hegang GroupHandan 056015HebeiChina The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The effect of Al content in molten steel on the interaction between SPHC steel(0.005-0.068 wt.%Al,and 19×10^(-4)-58×10^(-4)wt.%O)and MgO-C refractory(11.63 wt.%C)was ***-metallic inclusions in the steel were examined at various periods(0,5,15,30,45,and 60 min)as well as the MgO-C interface after 60 min of corrosion at 1600℃.The results show that when MgO-C refractory comes into contact with SPHC steel,the refractory interface consists of three layers arranged from the innermost to the outermost,including the original refractory layer,the dense MgO layer,and the iron infiltration *** carbon in the MgO-C refractories and the Al content in the molten steel undergo a reaction with the MgO in the refractories,resulting in an increase in Mg concentration in the *** Al content in the molten steel from 0.005 to 0.068 wt.%causes a spinel layer to appear at the interface,and the disappearance time of Al_(2)O_(3) inclusions in the steel decreases from 60 to 30 min,while the average MgO content in inclusions ***,controlling the Al content in the molten steel and the smelting duration can help regulate the formation of spinel inclusionsinthe steel.

关键词： MgO-C refractory SPHC steel Inclusion-Spinel Al-killed steel Interfacial reaction

Editorial:special topic on heterojunction in photocatalysts

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Science China Materials 2024年第2期67卷 379-381页

作者： Jiaguo yu xin Li Junwei fu Kai Dai Laboratory of Solar fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078China Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China Hunan Joint International Research Center for Carbon Dioxide Resource Utilization State Key Laboratory of Powder MetallurgySchool of PhysicsCentral South UniversityChangsha 410083China Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation College of Physics and Electronic InformationHuaibei Normal UniversityHuaibei 235000China

To suppress the recombination of photogenerated electron and hole in single photocatalysts,an important method is to design heterojunction by combining two *** method has widely used to enhance the photocatalytic performance of the *** the begining,most people use type-Ⅱcharge carrier transfer mechanism to explain the emhanced activity of the composite semiconductors.

关键词： composite heterojunction method

纳米薄层ZSM-5分子筛的制备及甲醇制丙烯反应性能

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化学工程师 2024年第4期38卷 6-9,119页

作者：陈浩李高龙潘春旭付宇昕翟岩亮东北石油大学化学化工学院黑龙江省聚烯烃新材料重点实验室黑龙江大庆163318

利用我国丰富的煤炭资源经甲醇制取丙烯,是一条重要的丙烯生产替代路线,其关键在于高效催化剂的研发。本文采用双子季铵盐C18-6-6Br2模板剂合成出二维层状堆积结构的纳米薄层ZSM-5分子筛。与亚微米级的ZSM-5分子筛相比,纳米薄层ZSM-5分... 详细信息

利用我国丰富的煤炭资源经甲醇制取丙烯,是一条重要的丙烯生产替代路线,其关键在于高效催化剂的研发。本文采用双子季铵盐C18-6-6Br2模板剂合成出二维层状堆积结构的纳米薄层ZSM-5分子筛。与亚微米级的ZSM-5分子筛相比,纳米薄层ZSM-5分子筛晶体在b轴方向上的厚度明显降低(仅为20nm左右),提高了催化剂的扩散性。应用于甲醇制丙烯(MTP)反应,相比于亚微米级ZSM-5分子筛A样品,纳米薄层ZSM-5分子筛B样品的丙烯选择性(48.3%v.s.40.1%)和催化寿命(170hv.s.80h)均显著提升,这为工业甲醇制丙烯催化剂的设计开发提供了新的思路。

关键词：甲醇制丙烯(MTP) ZSM-5 纳米薄层分子筛催化剂

Both gain-and loss-of-function variants of KCNA1 are associated with paroxysmal kinesigenic dyskinesia

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Journal of Genetics and Genomics 2024年第8期51卷 801-810页

作者： Wan-Bing Sun Jing-xin fu yu-Lan Chen Hong-fu Li Zhi-Ying Wu Dian-fu Chen Department of Medical Genetics and Center for Rare Diseases and Department of Neurologyand Zhejiang Key Laboratory of Rare Diseases for Precision Medicine and Clinical Translation in Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310009China Nanhu Brain-computer Interface Institute HangzhouZhejiang 314050China MOE Frontier Science Center for Brain Science and Brain-machine Integration School of Brain Science and Brain MedicineZhejiang UniversityHangzhouZhejiang 310012China

KCNA1 is the coding gene for Kv1.1 voltage-gated potassium-channelα*** variants of KCNA1 have been reported to manifest as paroxysmal kinesigenic dyskinesia(PKD),but the correlation between them remains unclear due to the phenotypic complexity of KCNA1 variants as well as the rarity of PKD *** the whole exome sequencing followed by Sanger sequencing,we screen for potential pathogenic KCNA1 variants in patients clinically diagnosed with paroxysmal movement disorders and identify three previously unreported missense variants of KCNA1 in three unrelated Chinese *** proband of one family(c.496G>A,p.A166T)manifests as episodic ataxia type 1,and the other two(c.877G>A,p.V293I and c.1112C>A,p.T371A)manifest as *** pathogenicity of these variants is confirmed by functional studies,suggesting that p.A166T and p.T371A cause a loss-of-function of the channel,while p.V293I leads to a gain-of-function with the property of voltage-dependent gating and activation kinetic *** reviewing the locations of PKD-manifested KCNA1 variants in Kv1.1 protein,we find that these variants tend to cluster around the pore domain,which is similar to ***,our study strengthens the correlation between KCNA1 variants and PKD and provides more information on genotype–phenotype correlations of KCNA1 channelopathy.

关键词： Paroxysmal kinesigenic dyskinesia KCNA1 Loss-of-function Gain-of-function Channelopathy Episodicataxiatype1

Correlation study between motor rehabilitation level and psychological state in patients with limb movement disorders after stroke

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World Journal of Psychiatry 2023年第11期13卷 912-918页

作者： Xiao-Wan Li yu-fu xin Ai-Hui Chang Xiao-Ge Zhang Yan Weng Jia-Hao Yang Qi-Zhi fu Department of Medical Rehabilitation The First Affiliated Hospitaland College of Clinical Medicine of Henan University of Science and TechnologyLuoyang 471003Henan ProvinceChina Department of Logistics The First Affiliated Hospitaland College of Clinical Medicine of Henan University of Science and TechnologyLuoyang 471003Henan ProvinceChina Department of Medical Intensive Care Unit The First Affiliated Hospitaland College of Clinical Medicine of Henan University of Science and TechnologyLuoyang 471003Henan ProvinceChina

BACKGROUND The psychological state of patients with post stroke limb movement disorders undergoes a series of changes that affect rehabilitation training and recovery of limb motor *** To determine the correlation between motor rehabilitation and the psychological state of patients with limb movement disorders after *** Eighty patients with upper and lower limb dysfunction post stroke were retrospectively enrolled in our *** on Hospital Anxiety and Depression Scale(HADS)scores measured before rehabilitation,patients with HADS scores≥8 were divided into the psychological group;otherwise,the patients were included in the normal *** function and daily living abilities were compared between the normal and psychological *** between the motor function and psychological status of patients,and between daily living ability and psychological status of patients were *** After 1,2,and 3 wk of rehabilitation,both the fugl-Meyer assessment and Barthel index scores improved compared to their respective baseline scores(P<0.05).A greater degree of improvement was observed in the normal group compared to the psychological group(P<0.05).There was a negative correlation between negative emotions and limb rehabilitation(-0.592≤r≤-0.233,P<0.05),and between negative emotions and daily living ability(-0.395≤r≤-0.199,P<0.05).CONCLUSION There is a strong correlation between motor rehabilitation and the psychological state of patients with post stroke limb movement *** higher the negative emotions,the worse the rehabilitation effect.

关键词： Stroke Limb movement disorders Motor rehabilitation Psychological state Correlation

The role of NF-κB activation in lipopolysacchavide induced keratitis in rats

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Chinese Medical Journal 2005年第22期118卷 1893-1899页

作者： WU xin-yi HAN Shao-ping REN Mei-yu CHANG yuan yu fu-xin Department of Ophthalmology Qilu Hospital Shandong UniversityJi＇nan 250012 China

Background Nuclear factor-kappa B （NF-kB） is elevated in regulating transcription of many cytokines and inflammatory mediators. The purpose of this study was to investigate the activation and the significance NF-KB in lipopolysaccharide （LPS） induced keratitis.Methods LPS induced keratitis model was based on Wistar rats. At 0. 5, 1, 3, 6, 12, 24 or 72 hours after LPS treatment, the rat corneas were observed with a slit lamp microscope, then the rats were sacrificed and their corneas were excised for routine histological analysis. The expression of NF-kB was detected with immunohistochemical staining. The change identified by reverse transcriptase polymerase of tumour necrosis factors-α （TNF-α） mRNA expression was chain reaction （RT-PCR）. Results Histological findings demonstrated that LPS treated corneas showed significant changes in corneal structure. Corneal edema, pronounced inflammatory cells infiltration and inordinate collagen fibres were observed. Immunohistochemical results showed that the expression of NF-kB and its activation obviously increased after LPS treatment compared with the normal group and control group. Positive cells could be observed at 0. 5 hour and peak expression of NF-kB was observed between 3 hours and 12 hours after infection, but returned to or approached normal level by 72 hours. RT-PCR showed that the level of TNF-α mRNA began to increase 0. 5 hour after LPS treatment, peaked at 6 hours and then subsided by 72 hours. NF-kB had a positive correlation with the expression of TNF-α mRNA （r=0. 964, P 〈 0. 01 ） , both NF-kB and TNF-α had a strong positive correlation with the degree of inflammatory response in LPS treated corneas （ r=0. 929, P 〈 0. 01 ; r=0. 587, P 〈 0.05, respectively）. Conclusions The activation of NF-kB was increased keratitis by promoting overexpression of TNF-α mRNA. LPS-associated keratitis in rats. in LPS treated corneas and was elevated in LPS induced NF-kB may play an important role in the pathogenesis ofLPS-as

关键词： keratitis·lipopolysaccharides tumour necrosis factors NF-kappa B

Calcium-chelating peptides from rabbit bone collagen:characterization,identification and mechanism elucidation

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Food Science and Human Wellness 2024年第3期13卷 1485-1493页

作者： fuhuan yuan yu fu Liang Ma Hankun Zhu Yong yu xin Feng Yi Sun Hongjie Dai xin Liu Zhengfang Liu yuhao Zhang College of Food Science Southwest UniversityChongqing 400715China Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing Chongqing 400715China Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of EducationChongqing 400715China Angel Yeast Co. Ltd.Yichang 443003China

This study aimed to characterize and identify calcium-chelating peptides from rabbit bone collagen and explore the underlying chelating *** peptides and calcium were extracted from rabbit bone by instant ejection steam explosion(ICSE)combined with enzymatic hydrolysis,followed by chelation reaction to prepare rabbit bone peptide-calcium chelate(RBCP-Ca).The chelating sites were further analyzed by liquid chromatography-tandem mass(LC-MS/MS)spectrometry while the chelating mechanism and binding modes were *** structural characterization revealed that RBCP successfully chelated with calcium ***,LC-MS/MS analysis indicated that the binding sites included both acidic amino acids(Asp and Glu)and basic amino acids(Lys and Arg),Interestingly,three binding modes,namely Inter-Linking,Loop-Linking and Mono-Linking were for the first time found,while Inter-Linking mode accounted for the highest proportion(75.1%),suggesting that chelation of calcium ions frequently occurred between two ***,this study provides a theoretical basis for the elucidation of chelation mechanism of calcium-chelating peptides.

关键词： Rabbit bone Collagen peptide Peptide-calcium chelate Chelation mechanism Liquid chromatography-tandem mass(LC-MS/MS)