Search research articles

关于 JoVE

概览领导团队博客 JoVE 帮助中心

作者

出版流程编辑委员会范围与政策同行评审常见问题投稿

图书馆员

用户评价订阅访问资源图书馆顾问委员会常见问题

研究

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments 存档

教育

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual 教师资源中心教师网站

使用条款与条件

相关概念视频

Polymers: Molecular Weight Distribution

Polymers: Molecular Weight Distribution

For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.

Polymer Classification: Stereospecificity

Polymer Classification: Stereospecificity

Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序

Same author

Impact of MWCNT Aspect Ratio on the Processing and Functional Properties of Buckypaper for EMI Shielding Applications.

ACS omega·2026

Same author

Multifunctional Hyaluronic Acid/Graphite Nanoplatelet Hydrogels as Tools for Spinal Cord Regeneration.

ACS applied materials & interfaces·2025

Same author

Chitosan/Alginate Polyelectrolyte Magnetic Gel Nanoarchitectonics with Tunable Mechanical Properties for Magnetic Hyperthermia and Sustained Release of 5-Fluorouracil.

ACS applied materials & interfaces·2025

Same author

Albumin/Hyaluronic Acid Gel Nanoparticles Loaded with a Pyrimidine-Based Drug for Potent Anticancer Activity.

Gels (Basel, Switzerland)·2025

Same author

Liposomal Formulations for Efficient Delivery of a Novel, Highly Potent Pyrimidine-Based Anticancer Drug.

Pharmaceuticals (Basel, Switzerland)·2025

Same author

New Cation Sensors Based on Eugenol-Derived Azo Dyes.

Molecules (Basel, Switzerland)·2025

Same journal

Correction: Komatsu et al. Three-Dimensional Visualization and Detection of the Pulmonary Venous-Left Atrium Connection Using Artificial Intelligence in Fetal Cardiac Ultrasound Screening. <i>Bioengineering</i> 2026, <i>13</i>, 100.

Bioengineering (Basel, Switzerland)·2026

Same journal

Comparison of CO<sub>2</sub> Laser and Microdebrider in the Surgical Treatment of Pediatric Recurrent Respiratory Papillomatosis: A Retrospective Analysis.

Bioengineering (Basel, Switzerland)·2026

Same journal

Toward More Translational Tumor Models: Breast dECM-Based 3D Systems Capture Native Microenvironmental Cues.

Bioengineering (Basel, Switzerland)·2026

Same journal

Postural Stability Changes During the 4 Phases of the Half Squat: Kinematics Profile of the Center of Pressure and Center of Mass in High-Performance Weightlifters-A Pilot Study.

Bioengineering (Basel, Switzerland)·2026

Same journal

Definite Implant Position as Novel Readout for Effectiveness of Ridge Preservation Indicates to Beneficial Effect of Combined Treatment with Platelet-Rich Fibrin (PRF) and Xenogenic Biomaterial in Bone Regeneration.

Bioengineering (Basel, Switzerland)·2026

Same journal

Trueness and Precision of Intraoral Scanners for 3D-Printed Orthodontic Models with Attachments: An In Vitro Comparative Study.

Bioengineering (Basel, Switzerland)·2026

查看所有相关文章

Search research articles

相关实验视频

Updated: Sep 13, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

聚合物通过光谱进行分类.

C M Penso¹, Elisabete M S Castanheira², Maria C Paiva³

¹Centre for MicroElectromechanical Systems (CMEMS-UMinho), University of Minho, 4800-058 Guimarães, Portugal.

Bioengineering (Basel, Switzerland)

|July 29, 2025

概括

此摘要是机器生成的。

这项研究使用光数据来识别六种常见的聚合物,包括聚胺6 (PA6) 和聚烯 (PS),通过选择最佳的光波长来进行准确的分类. 该方法有助于识别聚合物用于回收和环境监测.

关键词:

光是一种光.微塑料微塑料的使用这是一个光学传感器.塑料污染塑料污染一个聚合物聚合物.

更多相关视频

Polymer Microarrays for High Throughput Discovery of Biomaterials

Polymer Microarrays for High Throughput Discovery of Biomaterials

Published on: January 25, 2012

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

相关实验视频

Last Updated: Sep 13, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

Polymer Microarrays for High Throughput Discovery of Biomaterials

Polymer Microarrays for High Throughput Discovery of Biomaterials

Published on: January 25, 2012

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

科学领域:

分析化学分析化学
材料科学材料科学材料科学
频谱学是一种光谱学.

背景情况:

准确的聚合物识别对于回收,质量控制和环境监测至关重要.
现有的聚合物识别方法可能耗时或需要专门的设备.
了解不同光波长下的聚合物光,为快速精确的分类提供了潜在的途径.

研究的目的:

开发一种使用光数据准确识别聚合物的方法.
确定最佳的激发波长,以区分六种常见的聚合物.
探索光光谱在聚合物分类和分析中的应用.

主要方法:

收集了六种聚合物的光发射数据:聚胺6 (PA6),聚甲基甲酸 (PMMA),聚烯 (PP),聚烯 (PS),高密度聚乙烯 (HDPE) 和聚乙烯二甲酸 (PET).
聚合物暴露于激发光源,波长范围为245nm至345nm,间隔10nm.
分析了每个聚合物类型的独特光发射模式.

主要成果:

对六种研究的聚合物中每一种都确定了不同的光特征.
确定特定的最佳波长,提高聚合物分类的准确性.
证明光模式在激发波长的基础上有显著的变化.

结论:

光光谱学,特别是具有优化的波长,提供了一种有效的方法来识别常见的聚合物.
拟议的方法可以显著提高聚合物分类在各种应用中的准确性.
这种技术有望在回收,质量控制和微塑料分析中简化聚合物识别.