PubAg

Main content area

You searched for: Journal RSC advances Remove constraint Journal: RSC advances Publication Year 2019 Remove constraint Publication Year: 2019 Source 2019 v.9 no.31 Remove constraint Source: 2019 v.9 no.31
Start Over

Search

65  Search Results

« Previous | 1 - 20 of 65 |
Number of results to display per page

Search Results

1. A new way to improve the light-fastness of azo reactive dyes through the introduction of benzene sulfonamide derivatives into the triazine ring

Author:
Wei, Xiong; Wei, Ma; Shufen, Zhang
Source:
RSC advances 2019 v.9 no.31 pp. 17658-17663
ISSN:
2046-2069
Subject:
adverse effects; aniline; benzene; color; cyanuric chloride; diazo compounds; dyeing; fluorescence; fluorescence emission spectroscopy; infrared spectroscopy; reactive dyes; ultraviolet radiation
Abstract:
... Herein, a new kind of hetero-bifunctional reactive dyes with high light-fastness was designed and synthesized by introducing benzene sulfonamide and its derivatives into the triazine ring. Benzene sulfonamide or its derivatives and 2-amino-5-naphthol-7-sulfonic acid (J-acid) were condensed with cyanuric chloride to synthesize coupling components, which were then coupled with the diazo salt of 4-(β ...
DOI:
10.1039/c9ra02108f

2. Effective photoreduction of graphene oxide for photodegradation of volatile organic compounds

Author:
Tai, Xin Hong; Chook, Soon Wei; Lai, Chin Wei; Lee, Kian Mun; Yang, Thomas Chung Kuang; Chong, Siewhui; Juan, Joon Ching
Source:
RSC advances 2019 v.9 no.31 pp. 18076-18086
ISSN:
2046-2069
Subject:
adsorption; graphene oxide; humans; irradiation; methanol; models; moieties; oxidation; oxygen; photocatalysis; photocatalysts; photolysis; pollutants; pollution control; ultraviolet radiation; vapors; volatile organic compounds
Abstract:
... Nowadays, humans spend most of their time indoors and are frequently exposed to volatile organic compounds (VOCs) from various sources. The photocatalytic oxidation (PCO) method is a relatively more efficient method than the adsorption method for removing VOCs from the environment. In this work, graphene oxide (GO) was partially reduced via photoreduction under ultraviolet light (UV-A) irradiation ...
DOI:
10.1039/c9ra01209e

3. Fe³⁺-codoped ultra-small NaGdF₄:Nd³⁺ nanophosphors: enhanced near-infrared luminescence, reduced particle size and bioimaging applications

Author:
Li, Yabing; Li, Fujin; Huang, Yanan; Wu, Haiyan; Wang, Jian; Yang, Jin; Xiao, Qingbo; Lin, Hongzhen
Source:
RSC advances 2019 v.9 no.31 pp. 18070-18075
ISSN:
2046-2069
Subject:
coprecipitation; image analysis; ions; iron; light intensity; luminescence; magnetic resonance imaging; nanocrystals; nanoparticles; near-infrared spectroscopy; neoplasms; particle size; tissues
Abstract:
... Small-sized lanthanide-doped nanoparticles (NPs) exhibiting superior near-infrared (NIR) luminescence properties are highly desired for bioimaging applications. Herein, Fe³⁺ ions are codoped in NaGdF₄:Nd³⁺ nanocrystals via a simple coprecipitation method, which can simultaneously reduce the particle size and enhance the downconverting NIR luminescence of the NPs. The NIR luminescence intensity rea ...
DOI:
10.1039/c9ra00798a

4. Infrared and Raman spectra of Bi₂O₂X and Bi₂OX₂ (X = S, Se, and Te) studied from first principles calculations

Author:
Xu, Yao-Di; Wang, Cong; Lv, Yang-Yang; Chen, Y. B.; Yao, Shu-Hua; Zhou, Jian
Source:
RSC advances 2019 v.9 no.31 pp. 18042-18049
ISSN:
2046-2069
Subject:
Raman spectroscopy; bismuth; crystal structure; density functional theory; physical properties; selenium; sulfur; tellurium
Abstract:
... The bismuth oxychalcogenide compounds contain many different kinds of materials, such as Bi₂O₂X and Bi₂OX₂ (X = S, Se, and Te). These materials have different but similar layered crystal structures and exhibit various interesting physical properties. Here, we have theoretically investigated their Raman and infrared spectra by first principles calculations based on density functional theory. It is ...
DOI:
10.1039/c9ra02584g

5. Noninvasive diagnostic methods for diabetes mellitus from tear fluid

Author:
Glinská, Gabriela; Krajčíková, Kristína; Zakutanská, Katarína; Shylenko, Oleg; Kondrakhova, Daria; Tomašovičová, Natália; Komanický, Vladimír; Mašlanková, Jana; Tomečková, Vladimíra
Source:
RSC advances 2019 v.9 no.31 pp. 18050-18059
ISSN:
2046-2069
Subject:
atomic force microscopy; blindness; diabetic retinopathy; diagnostic techniques; drug therapy; fluorescence emission spectroscopy; fluorescence microscopy; hyperglycemia; hypoglycemic agents; infrared spectroscopy; insulin; laboratory techniques; patients; screening
Abstract:
... Diabetes mellitus and prolonged hyperglycemia can cause diabetic retinopathy. Diabetic retinopathy arises from damage to retinal vessels and, in its final stages, causes blindness. The early stages are often asymptomatic and although regular screening of diabetic patients is recommended, the beginning of diabetic retinopathy is insufficiently detected. The diagnostic potential of fluorescence spec ...
DOI:
10.1039/c9ra02078k

6. The anti-cancer activity and potential clinical application of rice bran extracts and fermentation products

Author:
Yu, Yonghui; Zhang, Jingjie; Wang, Jing; Sun, Baogao
Source:
RSC advances 2019 v.9 no.31 pp. 18060-18069
ISSN:
2046-2069
Subject:
absorption; adjuvants; antineoplastic activity; blood lipids; byproducts; fermented foods; mechanism of action; neoplasms; nutrients; nutritive value; oryzanol; patients; peptides; polysaccharides; proteins; rice; rice bran; rice bran oil; therapeutics; vitamins
Abstract:
... Rice bran is the main by-product of rice processing and contains approximately 64% of the nutrients in rice. Its various nutrient elements include rice bran proteins, oil, oryzanol, vitamins, polysaccharides, etc. The use of fermented technology can increase the content of bioactive peptides, promote the absorption efficiency, and further improve the functionality and added value of rice bran. In ...
DOI:
10.1039/c9ra02439e

7. A novel fabrication method of copper–reduced graphene oxide composites with highly aligned reduced graphene oxide and highly anisotropic thermal conductivity

Author:
Nazeer, Faisal; Ma, Zhuang; Xie, Yitong; Gao, Lihong; Malik, Abdul; Khan, Muhammad Abubaker; Wang, Fuchi; Li, Hezhang
Source:
RSC advances 2019 v.9 no.31 pp. 17967-17974
ISSN:
2046-2069
Subject:
anisotropy; composite materials; copper; graphene; graphene oxide; heat transfer; microstructure; modulus of rupture; scanning electron microscopy; thermal conductivity; thermal diffusivity
Abstract:
... Recently, metals with graphene and graphene oxide have been extensively used to enhance the mechanical and anisotropic thermal properties of composites. A novel facile fabrication approach of layer by layer self-assembly followed by hot press sintering was adopted to make copper–reduced graphene oxide composites. The microstructure and heat dissipation properties of pure copper and copper–reduced ...
DOI:
10.1039/c9ra03743h

8. Controllable TiO₂ coating on the nickel-rich layered cathode through TiCl₄ hydrolysis via fluidized bed chemical vapor deposition

Author:
Li, Xinxin; Shi, Hebang; Wang, Bo; Li, Na; Zhang, Liqiang; Lv, Pengpeng
Source:
RSC advances 2019 v.9 no.31 pp. 17941-17949
ISSN:
2046-2069
Subject:
cathodes; coatings; electrochemistry; fluidized beds; hydrolysis; models; titanium dioxide; vapors
Abstract:
... Surface coating of metal oxides is an effective approach for enhancing the capacity retention of a nickel-rich layered cathode. Current conventional coating techniques including wet chemistry methods and atomic layer deposition are restricted by the difficulty in perfectly balancing the coating quality and scale-up production. Herein, a highly efficient TiO₂ coating route through fluidized bed che ...
DOI:
10.1039/c9ra03087e

9. Direct synthesis of covalent triazine-based frameworks (CTFs) through aromatic nucleophilic substitution reactions

Author:
Chen, Tao; Li, Wen-Qian; Hu, Wei-Bo; Hu, Wen-Jing; Liu, Yahu A.; Yang, Hui; Wen, Ke
Source:
RSC advances 2019 v.9 no.31 pp. 18008-18012
ISSN:
2046-2069
Subject:
Lewis bases; chemical bonding; fluorescence; irradiation; photocatalysis; polymerization
Abstract:
... Despite extensive efforts, only three main strategies have been developed to synthesize covalent triazine-based frameworks (CTFs) thus far. We report herein a totally new synthetic strategy which allows C–C bonds in the CTFs to be formed through aromatic nucleophilic substitution reactions. The as-synthesized CTF-1 and CTF-2 exhibited photocatalytic water splitting activity comparable to the CTFs ...
DOI:
10.1039/c9ra02934f

10. Facile synthesis of 2-substituted benzo[b]furans and indoles by copper-catalyzed intramolecular cyclization of 2-alkynyl phenols and tosylanilines

Author:
Rong, Zhouting; Gao, Kexin; Zhou, Lei; Lin, Jianyuan; Qian, Guoying
Source:
RSC advances 2019 v.9 no.31 pp. 17975-17978
ISSN:
2046-2069
Subject:
catalytic activity; cyclization reactions; furans; indoles; phenols
Abstract:
... A catalytic amount of CuCl and Cs₂CO₃ was employed to synthesize a variety of 2-substituted benzo[b]furans and indoles by an intramolecular cyclization of 2-alkynyl phenols and tosylanilines. This protocol features mild conditions, high yields and broad substrate scope, which makes it a practical method for the synthesis of 2-substituted benzo[b]furans and indoles. ...
DOI:
10.1039/c9ra01260e

11. Identification of anti-inflammatory components of raw and steamed Panax notoginseng root by analyses of spectrum-effect relationship

Author:
Zhang, Zejun; Chen, Lijuan; Cui, Xiuming; Zhang, Yiming; Hu, Yupiao; Wang, Chengxiao; Xiong, Yin
Source:
RSC advances 2019 v.9 no.31 pp. 17950-17958
ISSN:
2046-2069
Subject:
Panax notoginseng; anti-inflammatory activity; bioactive compounds; chemometrics; ginsenosides; high performance liquid chromatography; inflammation; interleukin-6; least squares; lipopolysaccharides; quality control; roots; tumor necrosis factor-alpha
Abstract:
... To identify bioactive components of Panax notoginseng (PN) roots in raw and steamed forms, chemometrics analyses including bivariate correlation analysis and partial least squares regression were used to establish the relationships between the chromatograms and anti-inflammatory effect of PN samples. The chemical fingerprints of PN were obtained by high performance liquid chromatography. The anti- ...
DOI:
10.1039/c9ra00906j

12. Lewis acidic FeCl₃ promoted 2-aza-Cope rearrangement to afford α-substituted homoallylamines in dimethyl carbonate

Author:
Gadde, Karthik; Daelemans, Jonas; Maes, Bert U. W.; Abbaspour Tehrani, Kourosch
Source:
RSC advances 2019 v.9 no.31 pp. 18013-18017
ISSN:
2046-2069
Subject:
aldehydes; aldimines; amines; carbonates; catalytic activity; ferric chloride; iron; solvents
Abstract:
... The iron(iii)-catalyzed efficient strategy for the synthesis of α-substituted homoallylamines was accomplished via a cationic 2-aza-Cope rearrangement of aldimines, generated in situ by condensation of commercially available aldehydes and easily synthesizable 1,1-diphenylhomoallylamines. This reaction features a broad substrate scope with high yields and is conducted in an eco-friendly solvent, i. ...
DOI:
10.1039/c9ra03277k

13. Lysine-based dendrimer with double arginine residues

Author:
Sheveleva, Nadezhda N.; Markelov, Denis A.; Vovk, Mikhail A.; Mikhailova, Mariya E.; Tarasenko, Irina I.; Tolstoy, Peter M.; Neelov, Igor M.; Lähderanta, Erkki
Source:
RSC advances 2019 v.9 no.31 pp. 18018-18026
ISSN:
2046-2069
Subject:
arginine; biocompatibility; dendrimers; drugs; lysine; nanocarriers; nuclear magnetic resonance spectroscopy; toxicity; transfection
Abstract:
... Due to their well-defined structure, multivalency, biocompatibility, and low toxicity, lysine dendrimers can be used as safe and efficient nanocarriers for drug and gene delivery. One useful strategy for improving the gene delivery properties of dendrimers is modification with arginine amino acid (Arg) residues. Incorporation of Arg residues could be favorable for the enhancement in transfection e ...
DOI:
10.1039/c9ra02461a

14. Magneto-thermochromic coupling Janus sphere for dual response display

Author:
Cui, Yiwen; Wang, Yu; Wu, Jie; He, Xiaokang; Xuan, Shouhu; Gong, Xinglong
Source:
RSC advances 2019 v.9 no.31 pp. 17959-17966
ISSN:
2046-2069
Subject:
color; iron oxides; magnetic fields; microparticles; polyacrylamide; temperature
Abstract:
... This work demonstrates a simple microfluidic device to synthesize a magneto-thermochromic sphere with Janus inner structure. The Janus sphere is composed of Fe₃O₄ microspheres, thermochromic particles, and polyacrylamide matrix. Because the Fe₃O₄ microspheres are assembled together in one pole, the Janus sphere can turn around by varying the direction of the external magnetic field. Originating fr ...
DOI:
10.1039/c9ra02892g

15. Metastasis manners and the underlying mechanisms of ALK and ROS1 rearrangement lung cancer and current possible therapeutic strategies

Author:
Chang, Xing; Liu, Zi; Man, Shuai; Roys, Annie; Li, Zengqiang; Zuo, Daiying; Wu, Yingliang
Source:
RSC advances 2019 v.9 no.31 pp. 17921-17932
ISSN:
2046-2069
Subject:
adenocarcinoma; brain; cell movement; histology; lung neoplasms; lymphoma; metastasis; oncogenes; patients; prognosis; receptor protein-tyrosine kinase; therapeutics
Abstract:
... The rearrangements of anaplastic lymphoma kinase (ALK) and the c-ros oncogene 1 (ROS1) have both been important driving factors in non-small-cell lung cancer (NSCLC). They have already been defined in 3–5% of NSCLC patients. ALK and ROS1 rearrangements are associated with unique clinical and pathological features, especially patients are usually younger, with milder or never smoking history, and a ...
DOI:
10.1039/c9ra02258a

16. Naphthalimide-based optical turn-on sensor for monosaccharide recognition using boronic acid receptor

Author:
Seraj, Sanaz; Rouhani, Shohre; Faridbod, Farnoush
Source:
RSC advances 2019 v.9 no.31 pp. 17933-17940
ISSN:
2046-2069
Subject:
boronic acids; detection limit; dyes; fluorescence; fructose; graphene oxide; humans; pH
Abstract:
... A highly selective and sensitive fluorescent sensor for the determination of fructose is developed. The fluorescent sensor was prepared by incorporating a new naphthalimide dye with a planar structure as a selectophore and graphene oxide (GO) nanoplatelets as a quencher for rapid optical detection of fructose. The designed probe, made with the high fusion loop-containing dye, along with the GO nan ...
DOI:
10.1039/c9ra01757g

17. Oxidatively induced exposure of active surface area during microwave assisted formation of Pt₃Co nanoparticles for oxygen reduction reaction

Author:
Sandström, Robin; Ekspong, Joakim; Gracia-Espino, Eduardo; Wågberg, Thomas
Source:
RSC advances 2019 v.9 no.31 pp. 17979-17987
ISSN:
2046-2069
Subject:
annealing; catalysts; cobalt; commercialization; electrochemistry; fuel cells; microwave ovens; microwave treatment; nanoparticles; platinum; soot; surface area
Abstract:
... The oxygen reduction reaction (ORR), the rate-limiting reaction in proton exchange membrane fuel cells, can efficiently be facilitated by properly manufactured platinum catalysts alloyed with late 3d transition metals. Herein we synthesize a platinum : cobalt nanoparticulate catalyst with a 3 : 1 atomic ratio by reduction of a dry metalorganic precursor blend within a commercial household microwav ...
DOI:
10.1039/c9ra02095k

18. Polysaccharides from Polygonatum sibiricum Delar. ex Redoute induce an immune response in the RAW264.7 cell line via an NF-κB/MAPK pathway

Author:
Zhang, Jiaozhen; Liu, Na; Sun, Chao; Sun, Deqing; Wang, Yongjie
Source:
RSC advances 2019 v.9 no.31 pp. 17988-17994
ISSN:
2046-2069
Subject:
Polygonatum sibiricum; cell lines; dose response; immune response; inducible nitric oxide synthase; interleukin-6; lipopolysaccharides; messenger RNA; mitogen-activated protein kinase; nitric oxide; signal transduction; transcription (genetics); transcription factor NF-kappa B; tumor necrosis factor-alpha; water solubility
Abstract:
... The aim of this study was to examine the effect of polysaccharides from Polygonatum sibiricum (PSP) on RAW 264.7 cells together with the underlying signaling pathways. Water-soluble polysaccharides were extracted from Polygonatum sibiricum and the immunological activity/mechanism was explored in depth in RAW 264.7 cells. Our results demonstrated that PSP induced dendritic-like morphological change ...
DOI:
10.1039/c9ra03023a

19. Porcine hepatocytes culture on biofunctionalized 3D inverted colloidal crystal scaffolds as an in vitro model for predicting drug hepatotoxicity

Author:
Wu, Lingyan; Ferracci, Gaia; Wang, Yan; Fan, Teng Fei; Cho, Nam-Joon; Chow, Pierce K. H.
Source:
RSC advances 2019 v.9 no.31 pp. 17995-18007
ISSN:
2046-2069
Subject:
cell culture; collagen; diclofenac; drug toxicity; drugs; extracellular matrix; fibronectins; gene expression; hepatocytes; hepatotoxicity; hydrogels; in vivo studies; liver; models; phenotype; polyethylene glycol; prediction; swine; viability
Abstract:
... As drug-induced hepatotoxicity represents one of the most common causes of drug failure, three-dimensional (3D) in vitro liver platforms represent a fantastic toolbox to predict drug toxicity and thus reduce in vivo animal studies and lessen drug attrition rates. The aim of this study is to establish a functional porcine hepatocyte culture using a biofunctionalized 3D inverted colloidal crystal (I ...
DOI:
10.1039/c9ra03225h

20. Research progress in the development of organic small molecule fluorescent probes for detecting H₂O₂

Author:
Liu, Yuanyuan; Jiao, Chunpeng; Lu, Wenjuan; Zhang, Pingping; Wang, Yanfeng
Source:
RSC advances 2019 v.9 no.31 pp. 18027-18041
ISSN:
2046-2069
Subject:
animal tissues; fluorescence; fluorescent dyes; hydrogen peroxide; image analysis; metabolism; monitoring; oxidative stress
Abstract:
... Hydrogen peroxide (H₂O₂), as an important signaling molecule during biological metabolism, is a key member of the reactive oxygen species (ROS) family. The excess of H₂O₂ will lead to oxidative stress, which is a crucial factor in the production of various ROS-related diseases. In order to study the diverse biological roles of H₂O₂ in cells and animal tissues, many methods have been developed to d ...
DOI:
10.1039/c9ra02467k