检索结果-内蒙古大学图书馆

Terpyridine-Based Sensors for Metal Ion Detection: High Sensitivity, Selectivity, and Computational Analysis of Binding Mechanisms

引用

Journal of Inorganic and Organometallic Polymers and Materials 2025年 1-27页

作者： Mughal, Ehsan Ullah Naeem, Nafeesa Bozkurt, Ebru Pandey, Sujeet Kumar Sadiq, Amina Ogaly, Hanan A. Al-Zahrani, Fatimah A. M. Alzahrani, Abdullah Y. A. Department of Chemistry University of Gujrat Gujrat Pakistan Program of Occupational Health and Safety Vocational College of Technical Sciences Atatürk University Erzurum Turkey Department of Nanoscience and Nanoengineering Graduate School of Natural and Applied Sciences Atatürk University Erzurum Turkey Department of Chemical and Biochemical Engineering Rajiv Gandhi Institute of Petroleum Technology Jais India Department of Chemistry Govt. College Women University Sialkot Pakistan Chemistry Department College of Science King Khalid University Abha Saudi Arabia Department of Chemistry Faculty of Science King Khalid University Abha Saudi Arabia

In this study, new terpyridine ligands (1 and 2) were synthesized and their potential as chemosensor was investigated. Firstly, structural and optical characterization of the newly synthesized compounds 1 and 2 were performed by NMR, HRMS analyses, UV-vis. absorption and fluorescence spectrophotometer. To the best of our knowledge, the novelty of this study lies in the exceptional chemosensor potential demonstrated by our synthesized compounds, surpassing those reported in the literature. Solvent-dependent optical behavior was explored in thirteen different solvents, identifying ethanol as the optimal medium for sensor studies. The ion selectivity of 1 and 2 was examined against 20 different metal cations, revealing that compound 1 functions as a colorimetric sensor for Fe2+ and Fe3+, while compound 2 acts as a colorimetric sensor for both Fe2+, Fe3+ and Cr3+ and a fluorometric sensor for Zn2+ and Cd2+. With compound 1, the detection limits for Fe2+, Fe3+ were determined as 0.18 and 1.41 µM, respectively, and with compound 2, the detection limits for Fe2+, Fe3+, Cr3+, Zn2+ and Cd2+ were determined as 2.22, 0.22, 11.63, 0.31 and 2.50 µM, respectively. Both sensors demonstrated high selectivity and minimal interference from other cations. Furthermore, reversibility studies with EDTA confirmed the regenerative sensing ability of 2 for Zn2+ and Cd2+ detection. The binding mechanisms of compounds 1 and 2 with the detected ions (Fe2+, Fe3+, Cr3+, Zn2+ and Cd2+) were determined by FTIR measurements. Moreover, the validation of the detecting capabilities of chemosensors 1 and 2 is obtained using Density Functional Theory (DFT) and Time-Dependent DFT (TD-DFT) calculations, utilizing FMO and UV-Vis analyses to gain insights into their electronic structures and photophysical properties. The experimental findings were supported by computational studies, elucidating the electronic transitions and binding mechanisms. These findings indicate that the synthesized terpyridine-based

关键词： Colorimetric Cr3+ DFT Fe2+ Fe3+ Fluorescence Fluorometric TD-DFT Terpyridine UV-vis Zn2+ and Cd2+

来源：评论

学校读者我要写书评

暂无评论

study of land use changes in the limestone mining area of Pt. Solusi Bangun Andalas, Lhoknga site plant – Aceh besar

引用

AIP Conference Proceedings 2024年第1期3082卷

作者： Bella Hazmelia Muhammad Irham Mahidin Mahidin Graduate Study of Environmental Management Engineering Faculty Universitas Syiah Kuala Banda Aceh 23111 Indonesia Geographical Information Systems Laboratory Faculty of Marine and Fisheries Universitas Syiah Kuala Banda Aceh 23111 Indonesia Center for Environmental and Natural Resources Research (PPLH-SDA) Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia

Regarding environmental sustainability, the limestone mining system has become a challenge due to the magnitude of environmental degradation. Therefore, environmental changes need to be studied with the aim of identifying patterns and trends of land cover changes in time series from 2006 – 2021 in limestone mining PT. Solusi Bangun Andalas, Lhoknga site plant, Aceh Besar. The method used in this study is the use of satellite imagery combined with spatial maps using ArcGIS software. Time series visualization of satellite imagery is analyzed using trends in land use change in the form of graphs and spatial maps from year to year. The results of the analysis show that based on the analysis of the vegetation index, the trend of land use changes in vegetation gradually decreases towards barren lands even though efforts to restore ex-mining land are carried out continuously every year. However, changes in barren land have not dominated the existing vegetated land. The results also show that changes in land use have not affected changes in existing water discharge due to the limited study area.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Light-based vat-polymerization bioprinting

NATURE REVIEWS METHODS PRIMERS

引用

NATURE REVIEWS METHODS PRIMERS 2023年第1期3卷 1页

作者： Morneau-Brosnan, Dominique Department of Clinical Sciences Faculty of Veterinary Medicine Utrecht University Utrecht Netherlands Department of Orthopedics University Medical Center Utrecht Utrecht Netherlands Division of Engineering in Medicine Brigham and Women’s Hospital Department of Medicine Harvard Medical School Cambridge MA USA Department of Chemical and Biological Engineering University of Colorado Boulder Boulder CO USA BioFrontiers Institute University of Colorado Boulder Boulder CO USA Medical Scientist Training Program University of Colorado Anschutz Medical Campus Aurora CO USA Department of Health Sciences and Technology ETH Zürich Zürich Switzerland Wyss Institute for Biologically Inspired Engineering Harvard University Boston MA USA Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University Boston MA USA Department of NanoEngineering University of California San Diego La Jolla CA USA

Light-based vat-polymerization bioprinting enables computer-aided patterning of 3D cell-laden structures in a point-by-point, layer-by-layer or volumetric manner, using vat (vats) filled with photoactivatable bioresin (bioresins). This collection of technologies — divided by their modes of operation into stereolithography, digital light processing and volumetric additive manufacturing — has been extensively developed over the past few decades, leading to broad applications in biomedicine. In this Primer, we illustrate the methodology of light-based vat-polymerization 3D bioprinting from the perspectives of hardware, software and bioresin selections. We follow with discussions on methodological variations of these technologies, including their latest advancements, as well as elaborating on key assessments utilized towards ensuring qualities of the bioprinting procedures and products. We conclude by providing insights into future directions of light-based vat-polymerization methods.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Breathable Palladium Hydride Hydrogels Mediated 'Head and Tail' Co-Blocking HMGB1-RAGE Axis Strategy for Diabetic Foot Ulcer Treatment

SSRN

引用

SSRN 2025年

作者： Wang, Weidi Liu, Xueling Xiao, Jiali Zhang, Yunning Hao, Yu Hou, Ruidong You, Qing Song, Yilin Department of Pharmaceutical Sciences School of Pharmacy Shenyang Pharmaceutical University 103 Wenhua Road Shenyang110016 China Department of Pharmacy The Affiliated Cancer Hospital of Zhengzhou University Henan Cancer Hospital Zhengzhou450008 China School of Food and Healthy Beijing Technology and Business University 11 Fucheng Road Haidian District Beijing100048 China Departments of Diagnostic Radiology Surgery Chemical and Biomolecular Engineering and Biomedical Engineering Yong Loo Lin School of Medicine Faculty of Engineering National University of Singapore Singapore119074 Singapore Nanomedicine Translational Research Program NUS Center for Nanomedicine Yong Loo Lin School of Medicine National University of Singapore Singapore117597 Singapore Clinical Imaging Research Centre Centre for Translational Medicine Yong Loo Lin School of Medicine National University of Singapore Singapore117599 Singapore

Diabetes patients suffer from severe chronic consequences known as diabetic foot ulcers (DFUs), for which there are no particular therapy options. The inflammatory and oxidative microenvironments in DFUs stimulate the secretion of high mobility group box-1 (HMGB1), which binds with the receptor of advanced glycation endproducts (RAGE), causing inflammatory cascade reactions and immune microenvironment (IME) disorder, further exacerbating DFU damage. Strategies targeting the HMGB1-RAGE axis to end this vicious loop are still lacking. This study proposes a novel strategy based on "breathable hydrogels" to achieve HMGB1-RAGE axis "head and tail" co-blocking to regulate the IME for DFU treatments. Specifically, with palladium hydride (PdH) nanocubes as the functional structure, a hydrogel dressing was prepared from a double cross-linking network of biocompatible alginate and polyacrylamide and modified with trehalose as the network-repairing agent. Mechanistically, the obtained hydrogels can "inhale" the excess accumulated reactive oxygen species, inhibiting HMGB1 secretion, the "head" of the HMGB1-RAGE axis. Meanwhile, H2 "exhaled" from the hydrogels can suppress the expression of intracellular RAGE, thus blocking the HMGB1-RAGE axis and breaking the vicious cycle. The proposed "head and tail" co-blocking strategy based on "breathable hydrogels" offers a highly efficient, safe, and facile therapeutic protocol for DFUs. © 2025, The Authors. All rights reserved.

关键词： Crosslinking

来源：评论

学校读者我要写书评

暂无评论

Reach sustainability through Corporate Social Responsibility (CSR)

引用

IOP Conference Series: Earth and Environmental Science 2021年第1期716卷

作者： Yunita Ismail Environmental Engineering Study Program Faculty of Engineering President University 17550 Indonesia

The utilization of natural resources and the environment to improve the community's welfare is an unavoidable choice. The environment used should still protect the environment. This study aims to provide an overview of the company's efforts to implement its obligation to preserve the environment using a different type of Corporate Social Responsibility (CSR) program, which were community development and green marketing. The method used was a survey by taking the population at two different places, Jakarta and Pangkal Pinang. The sampling technique was done using a purposive method to obtain samples that meet the company's CSRreceiver's criteria. The number of the respondent from the first population is 44 respondents and from the second population is 100 respondents. Data analysis was done using simple and multiple linear regression. The results showed that CSR's implementation had a significant impact on education, health, and poverty reduction. CSR activity by the company was accepted by society activities directly in the form of counseling and mentoring. CSR activities conducted on marketing activities by implementing Green Marketing found that pricing and promoting an environmentally sound positive impact on consumers' willingness to buy back the product. In contrast, the product is not significantly influential.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Justification on cyclopropene to propyne isomerization pathway based on vibrational calculations 4

Justification on cyclopropene to propyne isomerization pathw...

引用

4th Padjadjaran International Physics Symposium 2019, PIPS 2019

作者： Madinah, R. Rusydi, F. Boli, L.S.P. Khoirunisa, V. Fahmi, M.Z. Zaidan, A.H. Research Center for Quantum Engineering Design Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya60115 Indonesia Department of Physics Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya60115 Indonesia Engineering Physics Study Program Institut Teknologi Sumatera Lampung35365 Indonesia Department of Chemistry Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya60115 Indonesia

We report a density-functional coupled with vibrational calculation on justifying the isomerization pathway of cyclopropene to propyne. The idea is to present the pathway in energy level diagram which the transition state is ensured by tracking a particular mode that supports the cyclic bond breaking and triple bond formation to occur. This mode decreases along the pathway and disappears at the transition state. To verify the designed pathway, the activation energy of the isomerization is used to find the rate constant with respect to experimental data at 500 K and 700 K by using transition state theory (TST). At those temperatures, TST predicts the rate constant at the same order of magnitude with the experimental result. It shows that the trend between calculation and experimental data is qualitatively in a good agreement, which implies that the designed pathway is justified. Furthermore, this study can be used as a guide if one needs to construct an isomerization pathway. © 2020 IOP Publishing Ltd. All rights reserved.

关键词： Rate constants

来源：评论

学校读者我要写书评

暂无评论

Work system method as an e-learning design framework in private universities

引用

Journal of Physics: Conference Series 2021年第1期1810卷

作者： C E Supriana Informatics Engineering Study Program Faculty of Engineering Pasundan University Bandung Indonesia

The development of information and communication technology, especially the internet provides opportunities to improve the ability of lecturers to deliver courses to students without being limited by distance and time. This can be done by utilizing e-learning which will accelerate the transfer of knowledge and skills. E-learning is distance education that utilizes various digital tools and platforms. These tools and platform are used to support interaction, lectures and delivery of instructions between lecturers and students. This study will discuss the use of work system methods and the use of e-learning technology in a business entity. The work system methods are used to design information systems. Meanwhile e-learning technology in a business entity serves lecturers and students, conduct lectures at private universities in increasing knowledge dissemination, educational affordability and the use of technology and information as its support. The result of this research is the works system method model which refers to the analysis of data from the internet accessibility survey of students, analysis of its components, the system development cycle, the revision of the vision, mission and resources in private universities and recommendations of opportunities for the development of higher quality e-learning implementation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Response of load-displacement on cubical sample of Oil-Palm shell with fly ash concrete using digital image correlation system

引用

AIP Conference Proceedings 2021年第1期2376卷

作者： Akhmad Dhannu Deltanto Nuraziz Handika Bastian Okto Bangkit Sentosa Civil Engineering Study Program Faculty of Engineering Universitas Indonesia Depok Indonesia

Oil-Palm industry produces some side products as solid waste which consist of 23% empty oil palm bunches, 6.5% oil palm shell, and 13% fiber from the main products. Reusing oil palm waste is very important to increase economic value and reduce potential pollution. One of the ways to exploit Oil Palm Shell (OPS) byproduct is to substitute the uses of natural coarse aggregate in concrete structure as building material. study on the use fly ash as one of the admixtures to increase OPS concrete compressive strength has been conducted. Digital Image Correlation (DIC) as a method of displacement response measurement was applied. Fujifilm XA-3 was used as primary camera to capture the image with speed of 3 frames per second (fps). An open source 2D-DIC, Ncorr v1.2 and MatLab student version of R2020a were used. The obtained average compressive strength is 25 MPa, the average of stiffness of the specimens is 946.95 kN/mm and the average of Poisson Ratio is 0.22 (range 0.21-0.22).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Designing knowledge sharing systems to support integrated eco-city planning and management

引用

IOP Conference Series: Earth and Environmental Science 2021年第1期737卷

作者： C E Supriana Informatics Engineering Study Program Faculty of Engineering Pasundan University Bandung Indonesia

The local government of a city as an organization depends on decision makers in government management to support the vision and mission of the city to achieve eco-city goals based on data and information from several knowledge domains. Knowledge management is seen as an increasingly important scientific discipline that encourages the creation, sharing and utilization of knowledge in an organization. Knowledge management is also related to the concept of intellectual capital, the most valuable organizational resource. Knowledge sharing systems are designed to help decision makers and stakeholders share their knowledge. Most knowledge management systems in organizations are designed to share the explicit knowledge of individuals, organizations and finally distributed to the community. This research is the approach in the development model that can be used in the governance to achieve eco-city goals. Complex knowledge about eco-cities requires policies that are based on current knowledge and can be implemented immediately with a thorough understanding of all aspects. The results of this study are understanding the problem of knowledge sharing as a valuable organizational asset, designing a knowledge sharing systems model, and improving systems to improve the quality of knowledge.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Air Jet Erosion study on Stir Casted Metal Matrix Composite Aluminum-SiC 1

Air Jet Erosion Study on Stir Casted Metal Matrix Composite ...

引用

1st International Conference on Design and Application of engineering Materials 2018, IC-DAEM 2018 in conjunction with 11th Seminar Nasional Metalurgi dan Material, SENAMM 2018

作者： Longalayuk, M. Ruskandi, C. Setiamarga, B.H. Materials Engineering Study Program Faculty of Mechanical and Aerospace Engineering Institute of Technology Bandung Indonesia Foundry Technology Department Bandung Manufacturing Polytechnics Indonesia

For equipment that operates in high-speed abrasive media, erosion will be the major factor for its failure. Metal Matrix Composite (MMC) Aluminum-Silicon Carbide has been developed for improving the lifetime for such application. In this research, MMC Al-SiC has been made using Al-7075 scrap with 5%, 10%, and 15% SiC powder addition. This MMC was manufactured using stir casting technique with 1% Magnesium addition. Optical metallography has been done to know the SiC distribution homogeneity. Erosion resistance of the MMC was studied using Air Jet Erosion Test with Alumina powder as abrasives. The microstructural study showed that MMC Al-SiC has been successfully manufactured although the SiC particle distribution has not been fully homogeneous yet. Air Jet Erosion Testing revealed that the addition of 5% SiC powder was optimal in increasing its erosion resistance. The SiC addition from 10 to 15% did not improve its erosion resistance significantly. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Silicon carbide

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：