检索结果-南通市图书馆

Production of Neural Progenitors from Bone Marrow Mesenchymal Stem Cells

Stem Cell Discovery 2016年第1期6卷 1-12页

作者： Maeda Mohammad Nahi Yaseen Ahmad Al-Joubory rafal abdullah Noah Mahmood Aesar A. Ahmed Ahmed Al-Shammari Experimental Therapy Department Iraqi Center of Cancer and Medical Genetic Research Al-Mustansiriyah University Baghdad Iraq Neuroscience Hospital Baghdad Iraq

In the brain, there are hundreds of types of specialized neurons and to generate one type of them we need to have neural progenitors for differentiation to specific neuron type. Mesenchymal stem cells (MSCs) are easily isolated, cultured, manipulated ex vivo, showing great potential for therapeutic applications. The adult MSCs have the potential to produce progeny that differentiate into a variety of cell types such as neurons. This fact suggests that MSCs derived neurons are an important cell type and a deep understanding of the molecular characteristics of it would significantly enhance the advancement of cell therapy for neurological disorders. Therefore, in this study, we isolated, identified, and studied neural progenitors by measuring expression levels through neurogenesis pathway of three neural differentiation markers nestin (NES), neurofilament (NF-L), and microtubule association protein (MAP-2) from mouse bone marrow MSCs (mouse bmMSCs) by using butylated hydroxyanisole (BHA) and diethyl sulfoxide (DMSO) as neural inducers agents. The results of immunocytochemistry and Real Time-PCR showed that in contrast to MSCs, neural differentiated cells showed neural progenitor pattern by showing stable increase in NES gene expression through differentiation process with increasing the protein expression through different exposures times, while NF-L gene and protein expression start to increased after 48 h but not replaced the NES expression completely even when its expression passed NES levels. The maturation marker Map-2 expression was low during the duration of differentiation period in protein and gene expression, which prove that these cells are still progenitors and can be redirected into specific type of neurons by further treatments.

关键词： BHA Nestin Neural Progenitors Cells MSCs MAP-2

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

Uncertainty and disturbance estimator-based model predictive control for wet flue gas desulphurization system

引用

Chinese Journal of Chemical Engineering 2024年第3期67卷 182-194页

作者： Shan Liu Wenqi Zhong Li Sun Xi Chen rafal Madonski School of Energy and Environment Key Laboratory of Energy Thermal Conversion and Control of Ministry of EducationSoutheast UniversityNanjing 210096China Faculty of Automatic Control Electronics and Computer ScienceSilesian University of TechnologyGliwise 44-100Poland

Wet flue gas desulphurization technology is widely used in the industrial process for its capability of efficient pollution *** desulphurization control system,however,is subjected to complex reaction mechanisms and severe disturbances,which make for it difficult to achieve certain practically relevant control goals including emission and economic performances as well as system *** address these challenges,a new robust control scheme based on uncertainty and disturbance estimator(UDE)and model predictive control(MPC)is proposed in this *** UDE is used to estimate and dynamically compensate acting disturbances,whereas MPC is deployed for optimal feedback regulation of the resultant *** viewing the system nonlinearities and unknown dynamics as disturbances,the proposed control framework allows to locally treat the considered nonlinear plant as a linear *** obtained simulation results confirm that the utilization of UDE makes the tracking error negligibly small,even in the presence of unmodeled *** the conducted comparison study,the introduced control scheme outperforms both the standard MPC and PID(proportional-integral-derivative)control strategies in terms of transient performance and ***,the results reveal that a lowpass-filter time constant has a significant effect on the robustness and the convergence range of the tracking error.

关键词： Desulphurization system Disturbance rejection Model predictive control Uncertainty and disturbance estimator Nonlinear system

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

Wide-angle digital holography with aliasing-free recording

引用

Photonics Research 2024年第5期12卷 1098-1106页

作者： rafal KUKOLOWICZ IZABELA GEREJ TOMASZ KOZACKI Institute of Micromechanics and Photonics Warsaw University of Technology02-525 WarsawPoland

High-quality wide-angle holographic content is at the heart of the success of near-eye display *** work proposes the first digital holographic(DH)system enabling recording wide-angle scenes assembled from objects larger than the setup field of view(FOV),which can be directly replayed without 3D deformation in the near-eye *** hologram formation in the DH system comprises free space propagation and Fourier transform(FT),which are connected by a rectangular ***,the object wave propagates in free space to the rectangular ***,the band-limited wavefield is propagated through the single lens toward the camera *** rectangular aperture can take two sizes,depending on which DH operates in off-axis or phase-shifting recording *** integral part of the DH solution is a numerical reconstruction algorithm consisting of two elements:fringe processing for object wave recovery and wide-angle propagation to the object *** second element simulates propagation through both parts of the experimental *** free space part is a space-limited angular spectrum compact space algorithm,while for propagation through the lens,the piecewise FT algorithm with Petzval curvature compensation is *** the experimental part of the paper,we present the wide-angle DH system with FOV25°×19°,which allows high-quality recording and reconstruction of large complex scenes.

关键词： recording angle holographic

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

Three-dimensional magnetization reconstruction from electron optical phase images with physical constraints

引用

Science China(Physics,Mechanics & Astronomy) 2024年第11期Mechanics & Astronomy) .卷 126-136页

作者： Boyao Lyu Shihua Zhao Yibo Zhang Weiwei Wang Fengshan Zheng rafal E.Dunin-Borkowski Jiadong Zang Haifeng Du Anhui Province Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field LaboratoryHefei Institutes of Physical Science Chinese Academy of Sciences Science Island Branch Graduate School of University of Science and Technology of China Department of Physics and Astronomy University of New Hampshire Department of Physics The City College of New York Physics Program Graduate Center of the City University of New York Department of Chemistry University of New Hampshire Institutes of Physical Science and Information Technology Anhui University Spin-X Institute Center for Electron Microscopy School of Physics and OptoelectronicsState Key Laboratory of Luminescent Materials and DevicesGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsSouth China University of Technology Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons Forschungszentrum Jülich

The ability to characterize three-dimensional(3D) magnetization distributions in nanoscale magnetic materials and devices is essential to fully understand their static and dynamic magnetic properties. Phase contrast techniques in the transmission electron microscope(TEM), such as electron holography and electron ptychography, can be used to record two-dimensional(2D) projections of the in-plane magnetic induction of 3D nanoscale objects. Although the 3D magnetic induction can in principle be reconstructed from one or more tilt series of such 2D projections, conventional tomographic reconstruction algorithms do not recover the 3D magnetization within a sample directly. Here, we use simulations to describe the basis of an improved model-based algorithm for the tomographic reconstruction of a 3D magnetization distribution from one or more tilt series of electron optical phase images recorded in the TEM. The algorithm allows a wide range of physical constraints, including a priori information about the sample geometry and magnetic parameters, to be specified. It also makes use of minimization of the micromagnetic energy in the loss function. We demonstrate the reconstruction of the 3D magnetization of a localized magnetic soliton — a hopfion ring — and discuss the influence of noise, choice of magnetic constants, maximum tilt angle and number of tilt axes on the result. The algorithm can in principle be adapted for other magnetic contrast imaging techniques in the TEM, as well as for other magnetic characterization techniques, such as those based on X-rays or neutrons.

关键词： three-dimensional magnetization vector field tomography differentiable programming electron holography micromagnetism

来源：

同方期刊数据库

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

Invasion of the raccoon dog Nyctereutes procyonoides in Europe： History of colonization, features behind its success, and threats to native fauna

引用

Current Zoology 2011年第5期57卷 584-598页

作者： Kaarina KAUHALA rafal KOWALCZYK Finnish Game and Fisheries Research Institute Itaiinen Pitkakatu 3 A FI-20520 Turku Finland Mammal Research Institute Polish Academy of Sciences 17-230 Bialowieza Poland

We aimed to review the history of the introduction and colonization of the raccoon dog Nyctereutes procyonoides in Europe, the features behind its successful expansion and its impact on native fauna. The raccoon dog quickly colonized new areas after being introduced to the European part of the former Soviet Union. Today it is widespread in Northern and Eastern Europe and is still spreading in Central Europe. Features behind its success include its adaptability, high reproductive potential, omnivory, hibernation in northem areas, multiple introductions with 〉 9000 individuals from different localities, and tendency to wander enabling gene flow between populations. Firm evidence of the raccoon dog＇s negative impact on native fauna, such as a reduction in bird populations, is still scarce. Raccoon dogs may destroy waterfowl nests, although a nest predation study in Latvia did not confirm this. Predator removal studies in Finland suggested that the raccoon dog＇s impact on game birds is smaller than expected. However, raccoon dogs may have caused local extinction of frog populations, especially on islands. Raccoon dogs may compete with other carnivores for food, for example for carrion in winter, or for the best habitat patches. In northern Europe potential competitors include the red fox Vulpes vulpes and the badger Meles meles, but studies of their diets or habitat preferences do not indicate severe competition. The raccoon dog is an important vector of diseases and parasites, such as rabies, Echinococcus mul-tilocularis and Trichinella spp. and this is no doubt the most severe consequence arising from the spread of this alien species in Europe [Current Zoology 57 （5）： 584-598, 2011].

关键词： Nyctereutes procyonoides Competition Introduction Predation Vector of diseases and parasites

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

Borrowing titania's photoinduced electrons for molecular switching

引用

Science China Chemistry 2016年第4期59卷 420-421页

作者： rafal Klajn Department of Organic Chemistry Weizmann Institute of Science

When exposed to light, titanium dioxide （titania, TiO2） can act as a powerful catalyst for degrading a variety of organic compounds. Anatase--one of the polymorphs of TiO2--has a band gap of 3.2 eV; exposing it to ultraviolet light causes the formation of electron-hole pairs, which, in the presence of water, can generate hydroxyl radicals--strong oxidizing agents. The photocatalytic behavior of titania has enabled the removal of various chemicals and microbiological im- purities from both drinking water and industrial waste wa- ter.

关键词：电子-空穴对二氧化钛分子开关工业废水处理借贷光致有机化合物羟基自由基

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

Impact of gastroesophageal reflux disease on the quality of life of Polish patients

引用

World Journal of Clinical Cases 2019年第12期7卷 1421-1429页

作者： rafal Gorczyca Piotr Pardak Anna Pekala rafal Filip Department of Clinical Endoscopy Institute of Rural Health Lublin 20-080 Poland Department of Gastroenterology with IBD Unit of Clinical Hospital 2 University of Rzeszów Rzeszów 35-301 Poland

BACKGROUND Gastro-esophageal reflux disease (GERD) is a serious health and social problem leading to a considerable decrease in the quality of life of patients. Among the risk factors associated with reflux symptoms and that decrease the quality of life are stress, overweight and an increase in body weight. The concept of healthrelated quality of life (HRQL) covers an expanded effect of the disease on a patient’s wellbeing and daily activities and is one of the measures of widely understood quality of life. HRQL is commonly measured using a selfadministered, disease-specific questionnaires. AIM To determine the effect of reflux symptoms, stress and body mass index (BMI) on the quality of life. METHODS The study included 118 patients diagnosed with reflux disease who reported to an outpatient department of gastroenterology or a specialist hospital ward for planned diagnostic tests. Assessment of the level of reflux was based on the frequency of 5 typical of GERD symptoms. HRQL was measured by a 36-item Short Form Health Survey (SF-36) and level of stress using the 10-item Perceived Stress Scale. Multi-variable relationships were analyzed using multiple regression. RESULTS Eleven models of analysis were performed in which the scale of the SF-36 was included as an explained variable. In all models, the same set of explanatory variables: Gender, age, reflux symptoms, stress and BMI, were included. The frequency of GERD symptoms resulted in a decrease in patients’ results according to 6 out of 8 SF-36 scales- except for mental health and vitality scales. Stress resulted in a decrease in patient function in all domains measured using the SF-36. Age resulted in a decrease in physical function and in overall assessment of self-reported state of health. An increasing BMI exerted a negative effect on physical fitness and limitations in functioning resulting from this decrease. CONCLUSION In GERD patients, HRQL is negatively determined by the frequency of reflux symptoms and b

关键词： Gastroesophageal reflux disease Stress Psychological factors Health-related quality of life Obesity

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

Simplifying ADRC design with error-based framework: case study of a DC-DC buck power converter

引用

Control Theory and Technology 2021年第1期19卷 94-112页

作者： rafal Madonski Krzysztof Lakomy Jun Yang Energy Electricity Research Center International Energy CollegeJinan UniversityGuangzhouZhuhai CampusChina PoznańUniversity of Technology PoznanPoland Key Laboratory of Measurement and Control of CSE Ministry of EducationSchool of AutomationSoutheast UniversityNanjingChina

In this work,the problem of designing a robust control algor ithm for a DC-DC buck power converter is *** applied solution is based on a recenly proposed eror-based version of the active disturbance rejection control(ADRC)scheme,in which the unknown higher-order lerms of the reference signal are treated as additional components of the system"total disturbance".The motivation here is to provide a prac tical following of a reference voltage trajectory for the buck converler in specific cases where neither the analytical form of the desired signal nor its future values are known a priori,hence cannot be directly used for control *** this *** application of the error-based ADRC results in a prac-tically appealing control technique,with compact struc *** control rule,and intwitive tuning(inherited from the conventional output-based ADRC scheme).***,and experimental results are shown to validate the efficacy of the error-based ADRC in buck converter control,followed by a discussion about the revealed theoretical and practical limitations of this approach.

关键词： DC-DC converter Power electronics Active disturbance rejection control ADRC Extended stale observer ESO Error-based form

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

ADRC in output and error form:connection,equivalence,performance

引用

Control Theory and Technology 2023年第1期21卷 56-71页

作者： rafal Madonski Gernot Herbst Momir Stankovic Energy and Electricity Research Center Jinan UniversityZhuhaiChina University of Applied Sciences ZwickauGermany University of Defence BelgradeSerbia

In this work,we investigate two specific linear ADRC structures,namely output-and *** former is considered a“standard”version of ADRC,a title obtained primarily thanks to its simplicity and effectiveness,which have spurred its adoption across multiple *** latter is found to be especially appealing to practitioners as its feedback error-driven structure bares similarities to conventional control solutions,like PI and *** this paper,we describe newly found connections between the two considered ADRC structures,which allowed us to formally establish conditions for their ***,the conducted comprehensive performance comparison between output-and error-based ADRCs has facilitated the identification of specific modules within them,which can now be conveniently used as building blocks,thus aiding the control designers in customizing ADRC-based solutions and making them most suitable for their applications.

关键词： Active disturbance rejection control(ADRC)-Output-based form Error-based form Equivalence condition:Comparative analysis

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

Deciphering the effects of disperser assemblages and seed mass on patterns of seed dispersal in a rodent community

引用

Integrative Zoology 2017年第6期12卷 457-467页

作者： Aleksandra WRÓBEL rafal ZWOLAK Department of Systematic Zoology Institute of Environmental BiologyAdam Mickiewicz UniversityPoland

The sizes of both seed dispersers and seeds are traits that are likely to interact to influence seed fate in many synzoochoric plant ***,we examined whether members of a granivorous rodent community consisting of species of different body size vary in their effectiveness as seed dispersers,and how this relationship may be altered by seed *** marked northern red oak(Quercus rubra)acorns with plastic tags and placed them in size-selective rodent *** exclosures allowed differential access of rodent groups based on different body size:(i)small(*** spp.);(ii)small and medium(*** striatus);and(iii)small,medium and large(*** carolinensis)species of *** removal did not differ among exclosure types,but more seeds were missing when removed by small rodents,probably because of *** treatments did not influence the relative frequency of acorn ***,small rodents cached considerably fewer and partially ate more acorns than the other 2 *** mean dispersal distance was the longest for cages with medium openings,intermediate for cages with large openings and the shortest for cages with small *** mass positively affected the probability of caching and this relationship was unaffected by exclosure *** conclusion,granivorous rodents of different body sizes strongly differed in their interactions with acorns,with small rodents acting primarily as acorn predators and medium and large species contributing significantly more to dispersal of red oaks.

关键词： acorn dispersal initial seed fate plant-animal interactions rodent community scatterhoarding

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

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：