检索结果-南通市图书馆

Exploring the utility of organo-polyoxometalate hybrids to inhibit SOX transcription factors

Cell Regeneration 2014年第1期3卷 69-75页

作者： Kamesh Narasimhan kevin micoine Emmanuel Lacôte Serge Thorimbert Edwin Cheung Bernold Hasenknopf Ralf Jauch Donnelly Centre for Cellular and Biomolecular Research University of TorontoToronto M5S 3E1Canada Genome Institute of Singapore 60 Biopolis StreetBuona Vista 138672Singapore Sorbonne Universités UPMC Univ Paris 06Institut Parisien de Chimie MoléculaireUMR 82324 Place Jussieu75005 ParisFrance CNRS Institut Parisien de Chimie MoléculaireUMR 82324 Place Jussieu75005 ParisFrance Faculty of Health Sciences University of MacaoAv.Padre Tomas PereiraTaipaMacaoChina Genome Regulation Laboratory Drug Development PipelineGuangzhou Institutes of Biomedicine190 Kai Yuan AvenueScience Park510530 GuangzhouChina

Background:SOX transcription factors constitute an attractive target class for intervention with small molecules as they play a prominent role in the field of regenerative biomedicine and cancer ***,rationally engineering specific inhibitors that interfere with transcription factor DNA interfaces continues to be a monumental challenge in the field of transcription factor chemical ***(POMs)are inorganic compounds that were previously shown to target the high-mobility group(HMG)of SOX proteins at nanomolar *** continuation of this work,we carried out an assessment of the selectivity of a panel of newly synthesized organo-polyoxometalate hybrids in targeting different transcription factor families to enable the usage of polyoxometalates as specific SOX transcription factor ***:The residual DNA-binding activities of 15 different transcription factors were measured after treatment with a panel of diverse *** belonging to the Dawson structural class were found to be more potent inhibitors than the Keggin ***,organically modified Dawson polyoxometalates were found to be the most potent in inhibiting transcription factor DNA binding *** size of the polyoxometalates and its derivitization were found to be the key determinants of their ***:Polyoxometalates are highly potent,nanomolar range inhibitors of the DNA binding activity of the Sox-HMG ***,binding assays involving a limited subset of structurally diverse polyoxometalates revealed a low selectivity profile against different transcription factor *** progress in achieving selectivity and deciphering structure-activity relationship of POMs require the identification of POM binding sites on transcription factors using elaborate approaches like X-ray crystallography and multidimensional *** summary,our report reaffirms that transcription factors are challenging molecular architec

关键词： architectures attractive rational

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A thermodynamic perspective on electrode poisoning in solid oxide fuel cells

引用

International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1449-1455页

作者： kevin Huang Department of Mechanical Engineering University of South CarolinaColumbiaUSA

A critical challenge to the commercialization of clean and high-efficiency solid oxide fuel cell(SOFC)technology is the insuf-ficient stack lifespan caused by a variety of degradation mechanisms,which are associated with cell components and chemical *** components related degradation refers to thermal/chemical/electrochemical deterioration of cell materials under operating conditions,whereas the latter regards impurities in feedstocks of oxidant(air)and reductant(fuel).This article provides a thermodynamic perspective on the understanding of the impurities-induced degradation mechanisms in *** discussion focuses on using thermodynamic ana-lysis to elucidate poisoning mechanisms in cathodes by impurity species such as Cr,CO_(2),H_(2)O,and SO_(2) and in the anode by species such as S(or H_(2)S),SiO_(2),and P_(2)(or PH_(3)).The author hopes the presented fundamental insights can provide a theoretical foundation for search-ing for better technical solutions to address the critical degradation challenges.

关键词： impurities air fuel reaction activity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Integrated photonic fractional convolution accelerator

引用

Photonics Research 2024年第8期12卷 1828-1839页

作者： kevin ZELAYA MOHAMMED-ALI MIRI Department of Physics Queens College of the City University of New YorkQueensNew York 11367USA Physics Program The Graduate Center of the City University of New YorkNew YorkNew York 10016USA

An integrated photonic circuit architecture to perform a modified-convolution operation based on the discrete fractional Fourier transform(DFrFT) is introduced. This is accomplished by utilizing two nonuniformly coupled waveguide lattices with equally spaced eigenmode spectra, the lengths of which are chosen so that the DFrFT and its inverse operations are achieved. A programmable modulator array is interlaced so that the required fractional convolution operation is performed. Numerical simulations demonstrate that the proposed architecture can effectively perform smoothing and edge detection tasks even for noisy input signals, which is further verified by electromagnetic wave simulations. Notably, mild lattice defects do not jeopardize the architecture performance, showing its resilience to manufacturing errors.

关键词： fractional convolution utilizing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Neuron-to-astrocyte proteostatic stress signaling in response to tau pathology

引用

Neural Regeneration Research 2024年第3期19卷 505-506页

作者： kevin Llewelyn Batenburg Wiep Scheper Amsterdam UMC location Vrije Universiteit Amsterdam Department of Human GeneticsAmsterdam Neuroscience-NeurodegenerationAmsterdamThe Netherlands Department of Functional Genomics Center for Neurogenomics and Cognitive ResearchVrije Universiteit AmsterdamAmsterdam Neuroscience-NeurodegenerationAmsterdamThe Netherlands

Maintenance of protein homeostasis or“proteostasis”is essential for the functioning and viability of *** is in particular the case for cells like neurons that cannot self-renew and acquire unique functional properties during their *** proteostatic stress responses are in place to protect cells from damage in case of proteostatic *** integrated stress response(ISR)is one of the key proteostatic stress responses in the cell(Costa-Mattioli and Walter,2020).The ISR is the downstream convergence point for the four stress-induced eIF2αkinases(EIF2AK1-4)that control stress-regulated protein translation via phosphorylation of the translation factor eIF2α.ISR activation results in a transient reduction of global translation while it concomitantly enhances the translation of specific mRNAs,including that encoding the activating transcription factor 4(ATF4).Together,the translational control mediated by the ISR results in a temporary reduction of the overall protein load and the selectively increased expression of proteins that contribute to restoration of the proteostatic balance.

关键词： translation stress Together

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High temperature deformation and recrystallization behavior of magnesium bicrystals with 90°<1010>and 90°<1120>tilt grain boundaries

引用

Journal of Magnesium and Alloys 2024年第2期12卷 625-638页

作者： kevin Bissa Talal Al-Samman Dmitri A.Molodov Institute of Physical Metallurgy and Materials Physics RWTH Aachen University52056 AachenGermany International Research Organization for Advanced Science and Technology(IROAST) Kumamoto UniversityKumamoto 860-8555Japan

The deformation mechanisms and dynamic recrystallization(DRX)behavior of specifically grown bicrystals with a symmetric 90°and 90°tilt grain boundary,respectively,were investigated under deformation in plane strain compression at 200℃and 400℃.The microstructures were analyzed by panoramic optical microscopy and large-area electron backscatter diffraction(EBSD)orientation *** analysis employed a meticulous approach utilizing hundreds of individual,small EBSD maps with a small step size that were stitched together to provide comprehensive access to orientation and misorientation data on a macroscopic *** slip primarily governed the early stages of deformation at the two temperatures,and the resulting shear induced lattice rotation around the transverse direction(TD)of the *** existence of the grain boundary gave rise to dislocation pile-up in its vicinity,leading to much larger TD-lattice rotations within the boundary region compared to the *** increasing temperature,the deformation was generally more uniform towards the bulk due to enhanced dislocation mobility and more uniform stress *** recrystallization at 200℃was initiated in{1011}-compression twins at strains of 40%and *** 400℃,DRX consumed the entire grain boundary region and gradually replaced the deformed microstructure with progressing *** recrystallized grains displayed characteristic orientations,such that their c-axes were perpendicular to the TD and additionally scattered between 0°and 60°from the loading *** recrystallized grains displayed mutual rotations of up to 30°around the c-axes of the initial grains,forming a discernible basal fiber texture component,prominently visible in the{1120}pole *** is noteworthy that the deformation and DRX behaviors of the two analyzed bicrystals exhibited marginal variations in response to strain and deformation temperature.

关键词： Elevated deformation temperatures Plain strain compression Magnesium bicrystals Panorama EBSD Dynamic Recrystallization

来源：

维普期刊数据库

同方期刊数据库评论

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：