Australian Journal of Chemistry最新文献_第5页

Injectable hydrogels of enzyme-catalyzed cross-linked tyramine-modified gelatin for drug delivery 酶催化交联酪胺修饰明胶的可注射水凝胶

IF 1.1 4区化学

Australian Journal of Chemistry Pub Date : 2023-02-28 DOI: 10.1071/ch22188

Yuanhan Tang, J.-F. Ding, Xun Zhou, Xintao Ma, Yi Zhao, Qiyu Mu, Zixu Huang, Q. Tao, Fangjie Liu, Ling Wang

{"title":"Injectable hydrogels of enzyme-catalyzed cross-linked tyramine-modified gelatin for drug delivery","authors":"Yuanhan Tang, J.-F. Ding, Xun Zhou, Xintao Ma, Yi Zhao, Qiyu Mu, Zixu Huang, Q. Tao, Fangjie Liu, Ling Wang","doi":"10.1071/ch22188","DOIUrl":"https://doi.org/10.1071/ch22188","url":null,"abstract":"Enzymatically catalyzed cross-linking is a hydrogel fabrication method that generally is considered to have lower cytotoxicity than traditional chemical cross-linking methods. In order to optimize the properties of injectable hydrogels and expand their applications, an enzyme-catalyzed cross-linked injectable hydrogel was designed. The tyramine-modified gelatin (G-T) was formed into a stable injectable hydrogel by the combination of horseradish peroxidase (HRP) and hydrogen peroxide (H2O2) catalysis. 1H NMR spectroscopy was used to demonstrate the successful modification of gelatin by tyramine. The surface morphology of the prepared hydrogels was characterized jointly by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Rheological tests demonstrated the tunable mechanical strength, formation kinetics, shear thinning and good self-recovery properties of the hydrogels. In addition, the hydrogels can be formed into various shapes by injection. The hydrogel network structure is complex and interlaced, as such it is suitable to encapsulate drugs for controlled release. The drug release from the prepared hydrogels followed the Peppas–Sahlin model and belonged to Fickian diffusion. This study constructed injectable hydrogels through the enzyme-catalyzed cross-linking of modified gelatin and applied the hydrogels for drug release, which is expected to expand the application in biomedical fields.","PeriodicalId":8575,"journal":{"name":"Australian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75414060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retraction notice to 'A Biocompatible Gd<sup>III</sup>–Organic Framework Incorporating Polar Pores for pH-Sensitive Anti-Cancer Drug Delivery and Inhibiting Human Bone Tumour Cells' 撤回“一种生物相容性Gd<sup>III</sup>–结合极性孔的有机框架，用于ph敏感性抗癌药物传递和抑制人类骨肿瘤细胞”的通知

4区化学

Australian Journal of Chemistry Pub Date : 2023-02-28 DOI: 10.1071/chv76n2retract

Mingliang Ren, Hui Li, Hu Liu, Lei Wang, Haibo Xiang, Xianrong Zhang, Bin Yu

引用次数: 0

The effects of templates and seeds on the properties of nanosheet SAPO-34 molecular sieves and their catalytic performance in the MTO reaction 模板和种子对纳米SAPO-34分子筛性能的影响及其在MTO反应中的催化性能

IF 1.1 4区化学

Australian Journal of Chemistry Pub Date : 2023-02-28 DOI: 10.1071/ch22238

Tao Jiang, Yingzhi Bai, Lu Li, Weiwei Tai, Yujia Wang, Haiyan Wang, N. Sun

{"title":"The effects of templates and seeds on the properties of nanosheet SAPO-34 molecular sieves and their catalytic performance in the MTO reaction","authors":"Tao Jiang, Yingzhi Bai, Lu Li, Weiwei Tai, Yujia Wang, Haiyan Wang, N. Sun","doi":"10.1071/ch22238","DOIUrl":"https://doi.org/10.1071/ch22238","url":null,"abstract":"Nanoscale SAPO-34 molecular sieves were synthesized by adding different types of seed into hydrothermal synthesis systems with tetraethylammonium hydroxide (TEAOH) and triethylamine (TEA) & tetraethylammonium bromide (TEABr) as templates. The effects of different types of template and seed on the crystal structure, morphology, grain size and acidity of the molecular sieves were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 isothermal adsorption–desorption and ammonia temperature-programmed desorption (NH3-TPD). The methanol-to-olefins (MTO) reaction performance of the synthesized samples was investigated in a fixed-bed reactor. The results showed that crystalline supernatant and seed soaking solution could be used as liquid seeds to assist in the synthesis of SAPO-34 molecular sieves with a lamellar structure. The yield of SAPO-34 synthesized by seed increased from 38.64 to 59.68%, and the methanol conversion rate was significantly improved as compared with that of SAPO-34 synthesized without seed. The nano-thickness of SAPO-34 synthesized with TEA&TEABr instead of TEAOH as template decreased from 100–150 to 40–50 nm, and the lifetime increased from 360 to 400 min with the original yield kept constant.","PeriodicalId":8575,"journal":{"name":"Australian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77258850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Synthesis of 12-quinoline substituted andrographolide derivatives and their preliminary evaluation as anti-aggregation drugs 12-喹啉取代穿心莲内酯衍生物的合成及其抗凝集作用的初步评价

IF 1.1 4区化学

Australian Journal of Chemistry Pub Date : 2023-02-28 DOI: 10.1071/ch22248

Xue Li, Jiafeng Yu, Xian-Ling Wu, Cui Hu, Xiaoqing Wang

引用次数: 0

A simple 3D printed microfluidic device for point-of-care analysis of urinary uric acid 一种简单的3D打印微流体装置，用于尿尿酸的即时分析

4区化学

Australian Journal of Chemistry Pub Date : 2023-02-10 DOI: 10.1071/ch22180

Kolsoum Dalvand, Alireza Ghiasvand, Sepideh Keshan-Balavandy, Feng Li, Michael Breadmore

{"title":"A simple 3D printed microfluidic device for point-of-care analysis of urinary uric acid","authors":"Kolsoum Dalvand, Alireza Ghiasvand, Sepideh Keshan-Balavandy, Feng Li, Michael Breadmore","doi":"10.1071/ch22180","DOIUrl":"https://doi.org/10.1071/ch22180","url":null,"abstract":"Point-of-care testing (POCT) technology allows scientists to monitor and diagnose diseases at the patient site, much faster than classical lab-based methods. Herein, a rapid, simple, and sensitive 3D printed microfluidic device integrated with smartphone-based on-chip detection is described for POCT quantification of urinary uric acid. The device includes two circular inputs each connected to a microliter-scale chamber, separated by an integrated porous membrane, located between the sample and reagent chambers. The microfluidic device was fabricated from a transparent photopolymer using a 3D printer, in a single run. The concentration of uric acid was determined based on a chromogenic reaction in which ferrous ion, produced via the reduction of ferric ion by the analyte, complexed with 1,10-phenanthroline, and the color was recorded by a smartphone. Response surface methodology including a central composed design was utilized to evaluate the experimental parameters and subsequent introduction of a multivariate model to describe the experimental conditions. Under the optimum conditions, the calibration curve was linear over the concentration range of 30–600 mg L−1. The limit of detection was determined to be 10.5 mg L−1. The microfluidic device was successfully utilized for the recovery and quantification of uric acid in the urine, with recoveries ranging from 91.7 to 99.7%.","PeriodicalId":8575,"journal":{"name":"Australian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136052313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Reactive intermediates and unusual molecules at Heron Island Heron岛的活性中间体和异常分子

IF 1.1 4区化学

Australian Journal of Chemistry Pub Date : 2023-01-20 DOI: 10.1071/chv76n1_fo

C. Wentrup

引用次数: 0

Directed chemical dimerisation enhances the antibacterial activity of the antimicrobial peptide MSI-78(4–20) 定向化学二聚化增强抗菌肽MSI-78(4-20)的抗菌活性

IF 1.1 4区化学

Australian Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.1071/ch23022

Rong Li, Thomas N. G. Handley, Wenyi Li, N. O’Brien-Simpson, M. Hossain, J. Wade

引用次数: 1

Chemical constituents of lawang root oil 罗旺根油的化学成分