Results 51 to 60 of about 135,838 (246)

Construction of a MOF‐Based Snap‐Top Delivery Nanosystem for Powerful Dual‐Responsive Synergistic Colitis Treatment

Advanced Science, EarlyView.
A snap‐top delivery nanosystem based on an azobenzene metal–organic framework achieves targeted release of 6‐mercaptopurine via acid‐stable frameworks and hypoxia/pH dual‐responsive β‐cyclodextrin gates. This multifunctional platform integrates three synergistic mechanisms: precision drug delivery to inflammatory sites, intrinsic antioxidant properties
Xin Li, Miao Xu, Heran Li, Huan Jiang, Xin Wang, Lianjun Ma, Ying‐Wei Yang   +6 more
wiley   +1 more source

A Novel Stoichio-Kinetic Model for the DPPH• Assay: The Importance of the Side Reaction and Application to Complex Mixtures

Antioxidants, 2021
The 2,2-diphenyl-1-picrylhydrazyl (DPPH•) assay is widely used to determine the antioxidant activity of food products and extracts. However, the common DPPH• protocol uses a two-point measurement and does not give information about the kinetics of the ...
Lucrezia Angeli, Sebastian Imperiale, Yubin Ding, Matteo Scampicchio, Ksenia Morozova   +4 more
doaj   +1 more source

DPPH radical-scavenging activity of GL extracts.

, 2013
DPPH radical-scavenging activity of GL extracts.
Shuping Zhong (77796), Zebin Jiang (491100), Fen Yao (491101), Yicun Chen (195955), Weizhou Chen (491102), Fuchun Zheng (195968), Ganggang Shi (195996)   +6 more
core   +1 more source

DPPH free radical scavenging activities of L-asparaginase.

, 2023
DPPH free radical scavenging activities of L-asparaginase.
Monaza Bibi (17291397), Azra Yasmin (4559179), Muhammad Tausif Chaudhry (17468051), Aneela Javed (823897), Ifrah Shafqat (7350485), Shaheen Shahzad (10208459), Safia Ahmed (540389), Imran Afzal (17468054)   +7 more
core   +1 more source

Biomimetic Polymerization of Tellurocysteine: Breaking the Natural Amino Acid Radioprotection Limitation

Advanced Science, EarlyView.
Inspired by natural amino acid polymer‐melanin systems, this study strategically incorporated tellurocysteine to develop advanced radiation‐shielding materials. This approach transformed the primary interaction mechanism between melanin‐based materials and incident photons from Compton scattering to the photoelectric effect. Tellurocysteine‐polymerized
Wei Chen, Hanjie Zhu, Yue Zhang, Yuqing Qiao, Ruotong Deng, Huaping Xu, Wei Cao   +6 more
wiley   +1 more source

Flavanol Derivatives from Rhizophora stylosa and Their DPPH Radical Scavenging Activity

Molecules, 2007
A new acetylated flavanol, 3,7-O-diacetyl (–)-epicatechin (3), and seven known flavanol derivatives, (–)-epicatechin (1), 3-O-acetyl (–)-epicatechin (2), 3,3′,4′,5,7-O-pentaacetyl (–)-epicatechin (4), (+)-afzelechin (5), (+)-
Bin-Gui Wang, Ze-Yu Peng, Xiao-Ming Li, Dong-Li Li   +3 more
doaj   +1 more source

The effect of ultrasound frequency on % DPPH.

, 2016
The effect of ultrasound frequency on % DPPH.
David A. Lightfoot (55293), Ruplal Choudhary (1639912), Dennis G. Watson (1887898), Mallika R. Dasari (1887892), Ammar Altemimi (1887895)   +4 more
core   +1 more source

Bioadhesive Hydrogel With Polyphenol‐Armored Nanogene Rejuvenates Chondrocyte Senescence for Aged Osteoarthritis Therapy

Advanced Science, EarlyView.
An adhesive hydrogel depot with polyphenol‐armored nanogenes is developed for treating aged osteoarthritis. This system maintains miR‐140 bioactivity, prolongs its intra‐articular retention, and enhances transfection into chondrocytes, leading to the downregulation of senescence‐associated pathways.
Liwei Yan, Runze Yang, Ting Zhou, Tianhao Xu, Yongqi Li, Yuelin Hu, Minghao Ge, Lei Zhang, Xiong Lu, Chaoming Xie, Weili Fu   +10 more
wiley   +1 more source

Advances and Perspectives in Graphene‐Based Quantum Dots Enabled Neuromorphic Devices

Advanced Science, EarlyView.
Graphene‐based QDs are zero‐dimensional carbon nanomaterials with pronounced quantum confinement and tunable electronic structures. Herein, we summarize their synthesis strategies and functionalization methods, and highlight their functional roles and operating mechanisms in devices, as well as recent advances in neuromorphic electronics. We anticipate
Yulin Zhen, Wei Zeng, Zherui Zhao, JiYu Zhao, Ziyan Huang, Zhuo Chen, Kui Zhou, Guanglong Ding, Su‐Ting Han, Ye Zhou   +9 more
wiley   +1 more source

Antioxidant evaluations by DPPH and ORAC methods.

, 2018
Antioxidant evaluations by DPPH and ORAC methods.
Ana Claudia F. Amaral (5770709), Leandro Stefano Sangenito (5770703), Ivana Correa Ramos Leal (5770712), Daniel Luiz Reis Simas (2614738), André Luis Souza dos Santos (294224), Camila Rodrigues Adão Malafaia (5770700), Denise Maria Guimarães Freire (819389), Anete Souza Mecenas (5770697), Thelma de Barros Machado (5770706)   +8 more
core   +1 more source