检索结果-内蒙古大学图书馆

B(s)→D(s)(*)M decays in the presence of final-state interactions

Physical Review D 2025年第9期111卷 095020-095020页

作者： Albertus Hariwangsa Panuluh Satoshi Tanaka Hiroyuki Umeeda Department of Physics Education Faculty of Teacher Training and Education Sanata Dharma University Paingan Maguwohardjo Sleman Yogyakarta 55282 Indonesia Physics Program Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima 739-8526 Japan Scientific Computational Division Nippon Advanced Information Service (NAIS Co. Inc.) 416 Muramatsu Tokaimura Naka-gun Ibaraki 319-1112 Japan Center for Theoretical Physics and College of Physics Jilin University Changchun 130012 China China Center of Advanced Science and Technology Beijing 100190 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

In light of the recent data for B¯(s)→D(s)(*)P and B¯(s)→D(s)V decays, we perform a model-independent phenomenological analysis in the presence of quasielastic rescattering. With the Wilson coefficients including contributions beyond the standard model, the lifetimes of the B meson and Bd0−B¯d0 mixing are investigated to clarify correlations among the observables. We show that parameter regions for quasielastic rescattering, the size of color-suppressed tree amplitudes, and new physics are constrained due to the lifetime data. As a consequence, it is revealed that this scenario can be tested by the future LHCb measurement of the width difference in Bd0−B¯d0 mixing and semileptonic CP asymmetry.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Recent developments in the computational study of protein structural and vibrational energy dynamics

引用

Biophysical Reviews 2020年第2期12卷 317-322页

作者： Leitner, David M. Yamato, Takahisa Department of Chemistry and Chemical Physics Program University of Nevada Reno 89557 NV United States Graduate School of Science Division of Material Science Nagoya University Furo-cho Chikusa-ku Nagoya 464-8602 Japan

Recent developments in the computational study of energy transport in proteins are reviewed, including advances in both methodology and applications. The concept of energy exchange network (EEN) is discussed, and a recent calculation of EENs for the allosteric protein FixL is reviewed, which illustrates how residues and protein regions involved in the allosteric transition can be identified. Recent work has examined relations between EENs and protein dynamics as well as structure. We review some of the computational studies carried out on several proteins that explore connections between energy conductivity across polar contacts in proteins and between proteins and water and equilibrium dynamics of the contacts, and we discuss some of the recent experimental work that addresses this topic. © 2020, International Union for Pure and Applied Biophysics (IUPAB) and Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Energy exchange network Energy transport FixL Hemoglobin Proteins

来源：评论

学校读者我要写书评

暂无评论

PVA-based bioinks for 3D bioprinting: A comprehensive review of their applications in tissue engineering

引用

Bioprinting 2025年 49卷

作者： Narges Johari Zary Adabavazeh Francesco Baino Materials Engineering Group Golpayegan College of Engineering Isfahan University of Technology Golpayegan Iran Ph.D. Program Graduate Institute of Precision Manufacturing National Chin-Yi University of Technology Taichung Taiwan ROC Institute of Materials Physics and Engineering Department of Applied Science and Technology Politecnico di Torino Torino Italy

3D bioprinting is an innovative approach that overcomes the limitations of traditional methods for creating cell-laden biomaterials and constructs. It allows for the fabrication of complex and biologically active tissue structures. This review aims to provide a comprehensive evaluation of polyvinyl alcohol (PVA)-based bioinks within a 3D bioprinting framework. PVA-based bioinks exhibit remarkable properties, such as biocompatibility, biodegradability, and the ability to enhance cell growth and differentiation. These properties make them appropriate for many tissue engineering applications. The study evaluates the physicochemical and biological properties of PVA bioinks, including how they combine with other materials such as gelatin, chitin, chitosan, alginate, agarose, cellulose, κ-carrageenan, methacrylate, nanoparticles, mineral additives, carbon nanotubes, graphene oxide, and extracellular matrix components. Furthermore, this review evaluates the benefits of market availability and enhanced printing resolution, in addition to the challenges posed by complexity, dependency on support baths, and the risk of contamination. The objective of this review is to draw attention to the capabilities of PVA-based bioinks and provide guidelines for future research to improve the effectiveness of these materials in tissue engineering and regenerative medicine.

关键词： Bioprinting Bioink Polyvinyl alcohol PVA-based bioinks

来源：评论

学校读者我要写书评

暂无评论

An enzyme-free and ultrafast cell-dissociation technique for cell culture applications using acoustofluidics 24

An enzyme-free and ultrafast cell-dissociation technique for...

引用

24th International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2020

作者： Salari, Alinaghi Appak-Baskoy, Sila Coe, Imogen R. Tsai, Scott S.H. Kolios, Michael C. Canada Biomedical Engineering Graduate Program Ryerson University Canada Department of Chemistry and Biology Ryerson University Canada Molecular Science Graduate Program Ryerson University Canada Department of Mechanical and Industrial Engineering Ryerson University Canada Department of Physics Ryerson University Canada

ISBN: (纸本)9781733419017

Cell-culture techniques are widely used for in-vitro drug screening and biochemical analyses. The classical models for dissociating cell monolayers into single-cell suspensions include enzymatic techniques (e.g., trypsinization). All available enzymatic and non-enzymatic techniques require long treatment duration, typically on the order of minutes (5-10 min). Here, we report a novel, ultrafast, and high-throughput technique, using acoustofluidics, that enables the detachment of adhered cells into suspensions within seconds, while maintaining cellular viability similar to that of the trypsinization method. In our technique, only the adhered cells experience the acoustic waves, minimizing any detrimental effects of the dissociating agent on the detached cells. © 2020 CBMS-0001

关键词： Cells

来源：评论

学校读者我要写书评

暂无评论

Continuous and discrete compartmental models for infectious disease

arXiv

引用

arXiv 2025年

作者： Sousa, Gustavo A. Souza, Diogo L.M. Gabrick, Enrique C. dos Reis, Patrício D.C. Bentivoglio, Lucas E. Batista, Antonio M. Szezech, José D. Department of Physics State University of Ponta Grossa PR Ponta Grossa84030-900 Brazil Graduate Program in Science State University of Ponta Grossa PR Ponta Grossa84030-900 Brazil Institute of Physics University of São Paulo SP São Paulo05315-970 Brazil Department of Mathematics and Statistics State University of Ponta Grossa PR Ponta Grossa84030-900 Brazil

The study of infectious disease propagation is essential for understanding and controlling epidemics. One of the most useful tools for gaining insights into the spread of infectious diseases is mathematical modelling. In terms of mathematical epidemiology, the main models are based on compartments, such as Susceptible–Infected (SI), Susceptible–Infected–Recovered (SIR), and Susceptible–Exposed–Infected–Recovered (SEIR). These models offer mathematical frameworks for representing the proliferation dynamics of various diseases, for instance flu and smallpox. In this work, we explore these models using two distinct mathematical approaches, Cellular Automata (CA) and Ordinary Differential Equations (ODEs). They are able to reproduce the spread dynamics of diseases with their own individuality. CA models incorporate the local interaction among individuals with discrete time and space, while ODEs provide a continuous and simplified view of a disease propagation in large and homogeneous populations. By comparing these two approaches, we find that the shape of the curves of all models is similar for both representations. Although, the growth rates differ between CA and ODE. One of our results is to show that the CA yields a power-law growth, while the ODE growth rate is well-represented by an exponential function. Furthermore, a substantial contribution of our work is using a hyperbolic tangent to fit the initial growth of infected individuals for all the considered models. Our results display a strong correlation between simulated data and adjusted function. We mainly address this successful result by the fact that the hyperbolic function captures both growing: the power-law (when considered the first terms of infinite sums) and combinations of exponential (when the hyperbolic function is written via exponential). Therefore, our work shows that when modelling a disease the choice of mathematical representation is crucial, in particular to model the onset of an epidemic. ©

关键词： Ordinary differential equations

来源：评论

学校读者我要写书评

暂无评论

High throughput intracellular delivery facilitated by acoustofluidics 24

High throughput intracellular delivery facilitated by acoust...

引用

24th International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2020

作者： Salari, Alinaghi Appak-Baskoy, Sila Coe, Imogen R. Abousawan, John Antonescu, Costin N. Tsai, Scott S.H. Kolios, Michael C. Canada Biomedical Engineering Graduate Program Ryerson University Canada Department of Chemistry and Biology Ryerson University Canada Molecular Science Graduate Program Ryerson University Canada Department of Mechanical and Industrial Engineering Ryerson University Canada Department of Physics Ryerson University Canada

ISBN: (纸本)9781733419017

Many cell-based therapies rely on the successful delivery of cargo materials into cells. Here, we present a novel in vitro strategy for intracellular delivery, which is based on adherent cells exposed to acoustic waves. Strong acoustic waves mediated through a substrate inside a microfluidic channel cause the adherent cells to oscillate. As a result of continuous cell oscillation and cell-induced microstreaming, successful delivery of different size dextrans into MDA-MB-231 cells (with delivery efficiencies of 55-85%) is demonstrated. This novel acoustofluidic method achieves rapid and scalable delivery of cargo materials into cells and thus may be preferred over lipofection, electroporation, or other delivery methods. © 2020 CBMS-0001

关键词： Cells

来源：评论

学校读者我要写书评

暂无评论

Multiplexed Nanoscopy via Buffer Exchange

引用

ACS Nano 2024年第34期18卷 23445-23456页

作者： Chang, Ting-Jui Ben Yang, T. Tony Department of Electrical Engineering National Taiwan University Taipei10617 Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei10617 Taiwan Department of Physics National Taiwan University Taipei10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Taipei10617 Taiwan

Understanding cellular functions, particularly in their intricate complexity, can greatly benefit from the spatial mapping of diverse molecules through multitarget single-molecule localization microscopy (SMLM). Existing methodologies, primarily restricting the encoding dimensions to color and lifetime or requiring cyclic staining, often involve broad chromatic detection, specialized optical configurations, or sophisticated labeling techniques. Here, we propose a simple approach called buffer-exchange stochastic optical reconstruction microscopy (beSTORM), which introduces an additional dimension to differentiate between single molecules irrespective of their spectral properties. This method leverages the distinguishable photoblinking responses to distinct buffer conditions, offering a straightforward yet effective means of fluorophore discrimination. Through buffer exchanges, beSTORM achieves multitarget SMLM imaging with minimal crosstalk. Direct integration with expansion microscopy (ExM) demonstrates its capability to resolve up to six proteins at the molecular level within a single emission color without chromatic aberration. Overall, beSTORM presents a highly compatible imaging platform, promising significant advancements in highly multiplexed nanoscopy for exploring multiple targets in biological systems with nanoscale precision. © 2024 The Authors. Published by American Chemical Society.

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

Angle and polarization independent plasmonic infrared band-stop filter with metallic disk on SiO2

Angle and polarization independent plasmonic infrared band-s...

引用

16th Opto-Electronics and Communications Conference, OECC 2011

作者： Abbas, Mohammed Nadhim Cheng, Cheng-Wen Chang, Yia-Chung Shih, Min-Hsiung Research Center for Applied Sciences Academia Sinica Taipei 11529 Taiwan Institute of Physics and Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Department of Engineering and System Science NTHU Hsinchu 300 Taiwan

ISBN: (纸本)9781612842882

We demonstrated Ag/SiO2 metallic disk structure can be applied as an efficient narrow stop band filter in the IR region. The absorption spectra of such structure are investigated both theoretically and experimentally. The metallic disk exhibits only one significant localized surface plasmon polariton mode for both TM and TE polarizations simultaneously which can give an ultrahigh immunity to incident angles and polarization direction. © 2011 National Sun Yat-Sen Univ.

关键词： Silica

来源：评论

学校读者我要写书评

暂无评论

Hydrodynamic Modelling of Early Peaks in Type Ibc Supernovae with Shock Cooling Emission from Circumstellar Matter

arXiv

引用

arXiv 2025年

作者： Chiba, Ryotaro Moriya, Takashi J. Astronomical Science Program Graduate Institute for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan National Astronomical Observatory of Japan National Institutes of Natural Sciences 2-21-1 Osawa Mitaka Tokyo181-8588 Japan School of Physics and Astronomy Monash University ClaytonVIC3800 Australia

Recent high-cadence transient surveys have uncovered a rare subclass of Type Ibc supernovae (SNe) that exhibit an early, blue peak lasting a few days before the main, radioactively powered peak. Since progenitors of Type Ibc SNe are typically compact and lack an extended envelope, this early peak is commonly attributed to shock cooling emission from circumstellar matter (CSM) surrounding the progenitor star. As such, these SNe provide a unique opportunity to constrain the pre-explosion activity of Type Ibc SN progenitors. We present the first systematic study of this Type Ibc SN population that uses hydrodynamic modelling. We simulated Type Ibc SNe exploding in a CSM using the multi-group radiation-hydrodynamics code STELLA, exploring a range of SN and CSM properties. By comparing the resulting theoretical multi-band light curves to a sample of seven Type Ibc SNe with early peaks, we constrained their CSM properties. Assuming a wind-like density distribution for the CSM, we found CSM masses of 10−2 −10−1 M☉ and CSM radii of (1−5) ×103 R☉. While the masses were roughly consistent with a previous estimate obtained using an analytical model, the radii were significantly different, likely due to our assumption of spatially spread out CSM. We infer that the progenitors could have created CSM via late-time binary mass transfer or pulsational pair instability. We also estimate that, in the planned ULTRASAT high-cadence survey, ∼ 30 shock cooling peaks from Type Ibc SNe will be observed. © 2025, CC BY-SA.

关键词： Supernovae

来源：评论

学校读者我要写书评

暂无评论

Approaching maximum resolution in structured illumination microscopy via accurate noise modeling

Npj imaging

引用

Npj imaging 2025年第1期3卷 5页

作者： Ayush Saurabh Peter T Brown J Shepard Bryan Iv Zachary R Fox Rory Kruithoff Cristopher Thompson Comert Kural Douglas P Shepherd Steve Pressé Center for Biological Physics Arizona State University Tempe AZ USA. Department of Physics Arizona State University Tempe AZ USA. Computational Science and Engineering Division Oak Ridge National Laboratory Oak Ridge TN USA. Department of Physics The Ohio State University Columbus OH USA. Interdisciplinary Biophysics Graduate Program The Ohio State University Columbus OH USA. School of Molecular Sciences Arizona State University Tempe AZ USA.

Biological images captured by microscopes are characterized by heterogeneous signal-to-noise ratios (SNRs) due to spatially varying photon emission across the field of view convoluted with camera noise. State-of-the-art unsupervised structured illumination microscopy (SIM) reconstruction methods, commonly implemented in the Fourier domain, often do not accurately model this noise. Such methods therefore suffer from high-frequency artifacts, user-dependent choices of smoothness constraints making assumptions on biological features, and unphysical negative values in the recovered fluorescence intensity map. On the other hand, supervised algorithms rely on large datasets for training, and often require retraining for new sample structures. Consequently, achieving high contrast near the maximum theoretical resolution in an unsupervised, physically principled manner remains an open problem. Here, we propose Bayesian-SIM (B-SIM), a Bayesian framework to quantitatively reconstruct SIM data, rectifying these shortcomings by accurately incorporating known noise sources in the spatial domain. To accelerate the reconstruction process, we use the finite extent of the point-spread-function to devise a parallelized Monte Carlo strategy involving chunking and restitching of the inferred fluorescence intensity. We benchmark our framework on both simulated and experimental images, and demonstrate improved contrast permitting feature recovery at up to 25% shorter length scales over state-of-the-art methods at both high- and low SNR. B-SIM enables unsupervised, quantitative, physically accurate reconstruction without the need for labeled training data, democratizing high-quality SIM reconstruction and expands the capabilities of live-cell SIM to lower SNR, potentially revealing biological features in previously inaccessible regimes.

关键词： Biophysics Image processing Imaging and sensing Super-resolution microscopy

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：