Spectroscopy

161.7K Papers

Follow See full results

Article Spectroscopy

Deciphering the complexes of zinc ions and hen egg white lysozyme: Instrumental analysis, molecular docking, and antimicrobial assessment

Agnieszka Rogowska, Anna Krol-Gorniak, Viorica Railean, Basem Kanawati, Phillipe Schmitt-Kopplin, Bernhard Michalke, Mateusz Sugajski, Pawel Pomastowski, Boguslaw Buszewski

Summary: In this study, the interaction between zinc ions and lysozyme protein was extensively examined using spectroscopic techniques and molecular docking. The results demonstrated the crucial role of deprotonated carboxyl and thiol groups in the binding process of zinc ions with the protein. Furthermore, the zinc-lysozyme complexes exhibited inhibitory effects against bacterial and yeast strains.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

A highly sensitive fluorescence nanosensor for determination of amikacin antibiotics using composites of carbon quantum dots and gold nanoparticles

Quang Khanh Nguyen, Dinh Thi Nguyen, Thi Mai Anh Pham, Bach Pham, Thi Anh Huong Nguyen, Tien Duc Pham, Shuchi Sharma, Duc Thang Pham, Ranga Rao Gangavarapu, Thi Ngoc Mai Pham

Summary: An on-off fluorescence nanosensor based on carbon quantum dots (CQDs) and gold nanoparticles (AuNPs) was developed for highly sensitive amikacin detection. The method offers a low detection limit, wide linear range, high precision, and rapid response time, successfully detecting amikacin in pharmaceutical and water samples.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Visible and near-infrared spectroscopic determination of sugarcane chlorophyll content using a modified wavelength selection method for multivariate calibration

Pauline Ong, Jinbao Jian, Xiuhua Li, Jianghua Yin, Guodong Ma

Summary: Spectroscopy in the visible and near-infrared region (Vis-NIR) is an effective technique for quantifying chlorophyll contents in plants, which are important indicators of their photosynthetic rate and health status. This study introduces a novel wavelength selection approach (MRC) to enhance the diagnostic accuracy of chlorophyll content in sugarcane leaves. The proposed MRC-GPR model, utilizing a subset of selected wavelengths, showed superior performance compared to other techniques.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Magnetic separation-enhanced photoluminescence detection of dipicolinic acid and quenching detection of Cu(II) ions

Taehyeong Kim, Hyeongjin Jeon, Jung-Rok Lee, Dokyoon Kim

Summary: Researchers have reported a strategy for sensitive detection of dipicolinic acid (DPA) assisted by magnetic separation. By using poly(acrylic acid)-coated iron oxide nanoparticles as a magnetic carrier, only a necessary amount of Tb3+ ions are delivered to DPA in a sample solution, allowing for accurate photoluminescence measurement of the Tb3+-DPA complex with minimal background noise.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Thiophene derived sky-blue fluorescent probe for the selective recognition of mercuric ion through CHEQ mechanism and application in real time samples

Palani Purushothaman, Subramanian Karpagam

Summary: A vibrant blue organic luminescent material with enhanced photophysical properties has been designed and synthesized for the recognition and detection of mercuric ions.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

A single recognition unit-based virtual sensor Array: Applying 3D fluorescence spectroscopy to inner filter effect-based sensing

Xiangfen Xue, Mingjie Wei, Jing Yuan, Xinyu Huang, Qinghua Cao, Changkun Xia, Xiangheng Niu, Xiulian Yin

Summary: This study demonstrates the use of inner filter effect combined with three-dimensional fluorescence spectroscopy to construct a virtual sensor array for economically and effectively recognizing compounds with structural similarities. Through 10-fold cross-validation optimization, a classification accuracy of 100% for single analytes was achieved.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Dual-signal fluorescence aptasensing system for adenosine triphosphate assisting by MoS2 nanosheets

Yifeng Lan, Qiang He, Yingqi Ma, Yanli Wei, Zhiwen Wei, Chuan Dong

Summary: In this study, a simple and sensitive fluorescent aptasensing system was developed for ATP detection. The system showed desirable sensitivity and detection performance.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Biophysical study of DC electric field induced stable formation of albumin-gold nanoparticles corona and curcumin binding

Manu Kumar, Vinod D. Jaiswal, Dhanashri S. Pangam, Pushpinder Bhatia, Amol Kulkarni, P. M. Dongre

Summary: Targeted drug delivery is a method of delivering drugs to tissues to achieve desired therapeutic effects. This study successfully established stable and functionalized bovine serum albumin-gold nanoparticle corona using a direct current electric field, which can be used for drug delivery applications.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Fluoride ion detection in aqueous medium: Colorimetric and turn-off fluorescent Schiff base chemosensor

Bhaswati Devi, Ankur Kanti Guha, Arundhuti Devi

Summary: This study focuses on a newly developed colorimetric Schiff base fluorescent sensor that can detect fluoride ions in an aqueous environment and exhibits a turn-off response. The confirmation of the recognition event is achieved through fluorescence titration, absorbance titration, and Density Functional Theory (DFT) calculation study. The results show that the sensor has a low detection limit for fluoride ions and moderate affinity, making it a promising candidate for monitoring fluoride ions in drinking water.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Custom Hyperspectral Imaging System Reveals Unique Spectral Signatures of Heart, Kidney, and Liver Tissues

Mohamed Hisham Aref, Sanzhar Korganbayev, Ibrahim H. Aboughaleb, Abdallah Abdelkader Hussein, Mohamed A. Abbass, Ramy Abdlaty, Yasser M. Sabry, Paola Saccomandi, Abou-Bakr M. Youssef

Summary: This study explores the optical properties of biological tissues using hyperspectral cameras, providing important information for medical applications such as endoscopic intervention or open surgery.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Raman spectroscopy and Raman optical activity of blood plasma for differential diagnosis of gastrointestinal cancers

Katerina Kralova, Ondrej Vrtelka, Marketa Fouskova, Petr Hribek, Bohus Bunganic, Michaela Miskovicova, Petr Urbanek, Miroslav Zavoral, Lubos Petruzelka, Lucie Habartova, Vladimir Setnicka

Summary: Improving early diagnosis of gastrointestinal cancers is crucial for reducing mortality. The non-specific symptoms pose a challenge in differentiating between different types of gastrointestinal cancers. By using Raman spectroscopy and Raman optical activity to analyze blood plasma samples, the study aimed to identify disease-specific alterations in biomolecular structure and composition. The statistical methods tested showed high accuracy in discriminating between cancer and control samples, as well as differentiating among the three studied cancer types.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Utilization of a novel PVC- optical sensor for high sensitive and selective determination of zinc ion in real samples

Reem F. Alshehri, Hesham H. El-Feky, Abdelrazek M. Askar, Alaa S. Amin, Mai Aish

Summary: A novel and highly specific bulk membrane optode was developed for the ultra-sensitive detection of zinc(II) in biological, pharmaceutical, and water samples. The optode demonstrated excellent reproducibility, stability, and a relatively long lifespan, making it suitable for precise and accurate monitoring of Zn(II) ion content.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

RaT: Raman Transformer for highly accurate melanoma detection with critical features visualization

Min Chang, Chen He, Yi Du, Yemin Qiu, Luyao Wang, Hui Chen

Summary: Melanoma is a fatal type of skin cancer, and early and accurate diagnosis is crucial for reducing mortality. In this study, a Raman Transformer (RaT) model is proposed to distinguish melanoma from normal tissue by integrating Raman spectroscopy and a Transformer encoder. The RaT model achieves high accuracy and sensitivity, surpassing the classical PCA + NNET method. Additionally, the model allows visualization and explanation of fingerprint peaks and their corresponding biological information.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Spectroscopic and theoretical studies on a novel bis(salamo)-like probe for highly effective fluorimetric-colorimetric identification of Fe3+ and Cu2+ in aquo-organic medium

Ya-Ting La, Ming-Xia Du, Lu-Lu Gan, Yang Zhang, Yin-Xia Sun, Wen-Kui Dong

Summary: A novel bis(salamo)-type sensor FT has been developed for fluorescence-colorimetric recognition of Fe3+/Cu2+. The sensor exhibits superior fluorescent performance and colorimetric sensing ability for Cu2+ and Fe3+ ions compared to other competitive metal ions. The FT probe shows an instant color change from colorless to red in sunlight when binding with Cu2+ ions, which can be observed by the naked-eye, and a fluorescence turn-off response under UV light for Fe3+ and Cu2+. The probe demonstrates better sensitivity, higher affinity, lower limit of detection, and faster response time in an aquo-organic medium. Test strips are also provided for convenient monitoring of Cu2+ and Fe3+ ions using naked eye and fluorescence methods.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Comparative assessment of structure-property relationships of new Cu(II) complex in selected density functionals

Davut Avci, Hatice Esra Comert, Fatih Sonmez, Necmi Dege, Omer Tamer, Yusuf Atalay

Summary: In this study, the structure-property relationships of a Cu(II) complex were evaluated using various experimental and computational methods. The results indicate that the Cu(II) complex has potential applications as a nonlinear optical material.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Probing analysis of Cu-doping on the structural, optical, morphological and magnetic properties of hematite nanoparticles and their antibacterial activity

P. Rajapandi, G. Viruthagiri

Summary: The present study describes the synthesis and characterization of pure and Cu doped α-Fe2O3 nanoparticles, and investigates their structural, morphological, optical, magnetic, and antibacterial properties. The findings reveal that Cu doping induces structural changes and deep level defects, resulting in an increased bandgap and enhanced antibacterial activity against gram (+ve) positive bacteria.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

SERS-active immunoassay kit for SARS-CoV-2 mediated by the cooperative chemical and electromagnetic effects of MXene modified with gold nanowires

Chucheng Wang, Junshan Han, Danni Xue, Chenjie Gu, Shuwen Zeng, Junhui Jiang, Tao Jiang, Xing Li, Kerong Wu

Summary: A novel SERS-active immunoassay kit has been developed for the fast monitoring of SARS-CoV-2 nucleocapsid protein. The kit utilizes gold nanowire forests grown on Ti3C2Tx and modified onto a PMMA matrix, exhibiting high sensitivity and remedied quantitative ability.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

New 1,8-naphthalimide-based colorimetric fluorescent probe for specific detection of hydrazine and its multi-functional applications

Guifen Lu, Siyuan Yu, Luyao Duan, Suci Meng, Sihan Ding, Ting Dong

Summary: In this study, a colorimetric fluorescent probe NI-CIN based on the intramolecular charge transfer mechanism was designed to specifically detect hydrazine. NI-CIN showed significant fluorescence enhancement and color change upon the addition of hydrazine, which could be observed by naked eye. Eco-friendly paper test strips were easily prepared using NI-CIN for real-time detection of hydrazine. NI-CIN also demonstrated potential applications in detecting hydrazine in water and soil samples, as well as bio-imaging in HepG-2 cells and zebrafish.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

AIE-based ratiometric fluorescent probe for mercury ion, medium-dependent fluorescence color change and optimized sensitivity in solid state

Xiaoli Chen, Haixia Zheng, Xinyi Li, Zhijun Ruan, Qiqi Lu, Wentao He, Junqi Lin, Jingwen Ran, Shanshan Liu

Summary: A new AIE-based luminogen TPES was synthesized and used as a ratiometric fluorescence probe for mercury(II) detection. The probe showed excellent selectivity and sensitivity towards Hg2+ and the presence of Hg2+ could be determined by observing the fluorescence color change.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

Article Spectroscopy

Highly selective, sensitive and biocompatible rhodamine-based isomers for Al3+detection: A comparative study

Sneha Ghosh, Shephali Mahato, Tiasha Dutta, Zisan Ahamed, Pritam Ghosh, Partha Roy

Summary: Selective detection of metal ions is crucial for understanding their roles in chemical and biological processes. In this study, we synthesized and characterized two rhodamine-based isomers and investigated their sensing properties towards Al3+. DFT study and cell imaging experiments demonstrated the practicality and high selectivity of these probes.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2024)

Add to Collection

«
1
2
3
4
5
»

See full results

Related Categories

Acoustics (210.4K) Astronomy & Astrophysics (496.7K) Crystallography (223.1K) Energy & Fuels (824.6K) Mineralogy (73.5K) Mining & Mineral Processing (75.2K) Nanoscience & Nanotechnology (726.6K) Nuclear Science & Technology (231.6K) Optics (799K) Physics, Applied (1.7M) Physics, Atomic, Molecular & Chemical (389.4K) Physics, Condensed Matter (779.5K) Physics, Fluids & Plasmas (214.8K) Physics, Mathematical (249.1K) Physics, Multidisciplinary (620.6K) Physics, Nuclear (183.3K) Physics, Particles & Fields (306.2K) Quantum Science & Technology (56K) Remote Sensing (187.4K) Thermodynamics (287.6K)

© Peeref 2019-2024. All rights reserved.