检索结果-南通市图书馆

Lanthanide Complexes with Acetylacetonate and 5,10,15,20-Tetra[para-|(4-chlorobenzoyloxy) phenyl]porphyrin

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2000年第3期16卷 259-262页

作者： ZHAO Zhi-xin LI Xiang-qing wang xing-qiao LIU Guo-fa Department of Chemistry Jilin UniversityChangchun 130023P.R.China

The lanthanide complexes of acetylacetonate and 5,10,15,20-tetra[para-(chlorobenzoyloxy)phenyl]porphyrin having a general formula Ln[(cbop)4p]acac (where Ln = Tb, Ho, Er, Tm;cbop = (4-chlorobenzoyloxy)phenyl;Hacac = a... 详细信息

关键词： Lanthanide complexes Porphyrin Acetylacetone

Fluorescence Properties of Porphyrin Dimers Incorporating an Anhydride Linker

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2006年第6期22卷 684-687页

作者： FA Huan-bao YIN Wei ZHENG Wen-qi LI Di SHAN Ning wang xing-qiao College of Chemistry Jilin University Changchun 130023 P. R. China

A preliminary study on a novel free base porphyrin dimer and a zinc prophyrin dimer by comparing their fluorescence properties with those of the corresponding monomers is presented. The fluorescence intensity of the free base dimer is five times higher than that of the monomer, but the fluorescence intensity of the zinc porphyrin dimer is nearly similar to that of the zinc porphyrin monomer. The emission spectra show that energy transfer occurs between the two units.

关键词： Porphyrin dimer Zinc dimer Fluorescence property

Fluorescence and Thermostability of Nanometer Porphyrin Trimer

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2006年第1期22卷 14-16页

作者： SHI Ying-yan FA Huan-bao ZHENG Wen-qi LI Di SHAN Ning wang xing-qiao College of Chemistry Jilin University Changchun 130023 P. R. China Departement of Base Science Jilin Institute of Architecture and Civil Engineering Changchun 130021 R. R. China

A nanometer porphyrin trimer was firstly synthesized with 1 ,3-dibromopropane as a bridge-linked agent and the fluorescence property and thermostability were studied. The results show that the fluorescence property and thermostability of the trimer are different from those of monoporphyrin. The effects of the molecule structure on the optical property and the thermostability were also studied in detail.

关键词： Monoporphyrin Porphyrin trimer Fluorescence Thermostability

Synthesis and Characterization of One-dimensional and Two-Dimensional Porphyrin Polymers (Ⅰ)

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2001年第2期17卷 226-227页

作者： LI Xiang-qing, wang xing-qiao, GUO Jing-fu, MENG He and LJU Guo-fa (Department of Chemistry, Jilin University, Changchun 130023, P. R. China) Jilin Univ Dept Chem Changchun 130023 Peoples R China

A procedure for the synthesis of one-dimensional tetraaminophenylporphyrin (TAPP) was described. Quantitative infrared (IR) spectrum analysis of the monomer showed that it exhibited strong absorption at 1,621 cm-1. Results also indicated that the interaction between porphyrin macrocycles was enhanced after the metalloporphyrin linked up with the axial ligand. The degree of polymerization in [Mn(TPP)(pyz)]n was assessed using the ligand absorption rate.

关键词： Synthesis Porphyrin polymer Bipyridine Imidazole

在线全文

学校读者我要写书评

暂无评论

乡土食品包装的文化价值与创新策略

食品与机械 2021年第9期37卷 117-120,152页

作者：王巧星贵州广播电视大学贵州贵阳550023

以当前"乡村振兴战略"的提出与实施为契机,从哲学基础、文化内涵和时代表达3个维度分析了乡土食品的文化价值,在此基础上提出了当前乡土食品包装过程中应充分挖掘其文化内涵、坚持绿色、健康的生态设计理念,并从尊重个性化的设计伦理入... 详细信息

以当前"乡村振兴战略"的提出与实施为契机,从哲学基础、文化内涵和时代表达3个维度分析了乡土食品的文化价值,在此基础上提出了当前乡土食品包装过程中应充分挖掘其文化内涵、坚持绿色、健康的生态设计理念,并从尊重个性化的设计伦理入手,积极探索乡土食品包装创新发展路径。

关键词：乡村振兴乡土食品包装传统文化

A Study of Synthesis, Immobilization and Catalytic Capability of Metalloporphyrin

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1998年第2期14卷 3-7页

作者： wang xing qiao , GAO Shuang, CA Chang sheng YU Lian xiang, GUO Jing fu, SHUN Shu ju and CAO Xi zhang (Department of Chemistry, Jilin University, Changchun, 130023) Jilin Univ Dept Chem Changchun 130023 Peoples R China

A stepwise synthesis method was used to immobilize tetrachloro tetramethyl porphyrins in the supercages of NaCoX molecular sieve. The immobilized porphyrin was characterized by means of UV Vis, IR, DTA, SEM and EPR. A comparision was made for the activities among tetrachloro tetramethyl porphyrins, its cobalt(Ⅱ) complex, NaCoX molecular sieve and the immobilized porphyrin as catalysts in the oxidation reaction of styrene and p cresol. The stability and catalytic capability of the metalloporphyrin is increased after the combination of porphyrin with molecular sieve. In addition, this new type of catalyst tetrachloro tetramethyl porphyrin immobilized in the supercages of NaCoX molecular sieve not only possesses the advantages of both porphyrin and molecular sieve, but also makes up for their respective deficiencies. The experimental results confirmed that both the stability and catalytic capability of metalloporphyrin immobilized in the supercages of molecular sieve are increased.

关键词： Metalloporphyrin Synthesis Immobilization Catalytic capability

在线全文

学校读者我要写书评

暂无评论

利用卟啉中位羧基基团直接缩合卟啉二聚体

高等学校化学学报 2006年第1期27卷 17-19页

作者：法焕宝赵朗王杏乔吉林大学化学学院长春130023

A meso-porphyrin dimer was synthesized by direct condensation between two meso-corrboxy group of porphyrin *** purple rude product was purified on a silicon gel *** identity of the mesoporphyrin dimer was confirmed by the methods of elemental analysis,MS,1H NMR,UV-Vis and *** synthesis method is simple and the rude-product is easy to be purified with a high yield.

关键词：羧基卟啉卟啉二聚体卟啉二聚体的合成

Stiffness-tunable biomaterials provide a good extracellular matrix environment for axon growth and regeneration

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第5期20卷 1364-1376页

作者： Ronglin Han Lanxin Luo Caiyan Wei Yaru qiao Jiming Xie Xianchao Pan Juan xing Department of Pathophysiology School of Basic Medical SciencesSouthwest Medical UniversityLuzhouSichuan ProvinceChina Department of Medicinal Chemistry School of PharmacySouthwest Medical UniversityLuzhouSichuan ProvinceChina

Neuronal growth, extension, branching, and formation of neural networks are markedly influenced by the extracellular matrix—a complex network composed of proteins and carbohydrates secreted by cells. In addition to providing physical support for cells, the extracellular matrix also conveys critical mechanical stiffness cues. During the development of the nervous system, extracellular matrix stiffness plays a central role in guiding neuronal growth, particularly in the context of axonal extension, which is crucial for the formation of neural networks. In neural tissue engineering, manipulation of biomaterial stiffness is a promising strategy to provide a permissive environment for the repair and regeneration of injured nervous tissue. Recent research has fine-tuned synthetic biomaterials to fabricate scaffolds that closely replicate the stiffness profiles observed in the nervous system. In this review, we highlight the molecular mechanisms by which extracellular matrix stiffness regulates axonal growth and regeneration. We highlight the progress made in the development of stiffness-tunable biomaterials to emulate in vivo extracellular matrix environments, with an emphasis on their application in neural repair and regeneration, along with a discussion of the current limitations and future prospects. The exploration and optimization of the stiffness-tunable biomaterials has the potential to markedly advance the development of neural tissue engineering.

关键词： alginate axon growth biomaterials extracellular matrix neural repair neurons neuroregeneration polyacrylamide polydimethylsiloxane stiffness

Small extracellular vesicles derived from human induced pluripotent stem cell-differentiated neural progenitor cells mitigate retinal ganglion cell degeneration in a mouse model of optic nerve injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 587-597页

作者： Tong Li Hui-Min xing Hai-Dong Qian qiao Gao Sheng-Lan Xu Hua Ma Zai-Long Chi State Key Laboratory of Ophthalmology Optometry and Visual ScienceEye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina

Several studies have found that transplantation of neural progenitor cells(NPCs)promotes the survival of injured ***,a poor integration rate and high risk of tumorigenicity after cell transplantation limits their clinical *** extracellular vesicles(sEVs)contain bioactive molecules for neuronal protection and *** studies have shown that stem/progenitor cell-derived sEVs can promote neuronal survival and recovery of neurological function in neurodegenerative eye diseases and other eye *** this study,we intravitreally transplanted sEVs derived from human induced pluripotent stem cells(hiPSCs)and hiPSCs-differentiated NPCs(hiPSC-NPC)in a mouse model of optic nerve *** results show that these intravitreally injected sEVs were ingested by retinal cells,especially those localized in the ganglion cell *** with hiPSC-NPC-derived sEVs mitigated optic nerve crush-induced retinal ganglion cell degeneration,and regulated the retinal microenvironment by inhibiting excessive activation of *** analysis further revealed that hiPSC-NPC derived sEVs transported neuroprotective and anti-inflammatory miRNA cargos to target cells,which had protective effects on RGCs after optic nerve *** findings suggest that sEVs derived from hiPSC-NPC are a promising cell-free therapeutic strategy for optic neuropathy.

关键词： exosome miRNA neural progenitor cell neurodegeneration neuroinflammation neuroprotection optic nerve crush optic neuropathy retinal ganglion cell small extracellular vesicles