Results 61 to 70 of about 143,720 (300)

Icariin Enhances the Enzymatic Activity of N‐acetylgalactosaminidase to Augment Akkermansia Abundance in Gut Microbiota for Improved PD‐1 Blockade Efficacy in Tumor Suppression

Advanced Science, EarlyView.
Icariin promoted the growth of Akk by enhancing the activity of N‐acetylgalactosaminidase (Amuc_0920), which enhanced mucin utilization and provided a favorable nutrient environment for bacterial growth. This icariin‐mediated enrichment of Akk further reshaped the tumor microenvironment and promoted CD8+ T cell infiltration, ultimately synergizing with
Shuangying Qiao, Liu Yang, Haibang Hao, Qiuxia Ding, Feng Ding, Zheng Chen, Jinfang Zhang, Yun He, Meng Li, Jun Xu, Chao Wang, Aiping Lu, Fangfei Li   +12 more
wiley   +1 more source

Discovery and Biosynthesis of the Novel Glycotetrapeptide Antibiotic Biffamycin A

Angewandte Chemie, EarlyView.
Genetic de‐regulation of a silent biosynthetic pathway allowed isolation and characterisation of a novel glycopeptide antibiotic named biffamycin A, which harbours unprecedented 5‐chloro‐4‐methoxy tryptophan and 3R‐hydroxy(α‐D‐mannoysl)‐D‐lysine moieties and is bioactive against MRSA and VRSA.
Michael W. Brigham, Edward S. Hems, Daniel C. L. Van, Justin E. Clarke, Sergey Nepogodiev, Julius S. P. Adamson, Christian Bassi, Michael E. Webb, Glyn R. Hemsworth, Orde Q. Munro, Barrie Wilkinson, Ryan F. Seipke   +11 more
wiley   +2 more sources

Fluorescent Bis(guanidine) Copper Complexes as Precursors for Hydroxylation Catalysis

Inorganics, 2018
Bis(guanidine) copper complexes are known for their ability to activate dioxygen. Unfortunately, until now, no bis(guanidine) copper-dioxygen adduct has been able to transfer oxygen to substrates.
Florian Strassl, Alexander Hoffmann, Benjamin Grimm-Lebsanft, Dieter Rukser, Florian Biebl, Mai Anh Tran, Fabian Metz, Michael Rübhausen, Sonja Herres-Pawlis   +8 more
doaj   +1 more source

Cezanne regulates E2F1-dependent HIF2α expression [PDF]

, 2015
Mechanisms regulating protein degradation ensure the correct and timely expression of transcription factors such as hypoxia inducible factor (HIF).
Altun, Bangoura, Baudino, Bento, Bett, Bremm, Bremm, Bremm, Budhavarapu, Chiavarina, Cox, Enesa, Fandrey, Fraile, Gordan, Gordan, Holmquist-Mengelbier, Hospenthal, Hu, Hubbi, Ivan, Jaakkola, Keith, Komander, Li, Li, Li, Linehan, Liu, Lukas, Luong, Matsumoto, Meyer, Neumann, Noguera, Pal, Pareja, Raval, Rius, Schumm, Scrideli, Semenza, Shen, Stevens, Troilo, van Uden, Wada, Webster, Yu   +48 more
core   +4 more sources

Surface‐Bound Superoxide Radical‐Mediated Photo‐Fenton Mineralization of Ciprofloxacin on Fe‐Sillenite Nanosheets

Advanced Science, EarlyView.
This study systematically compares the degradation efficiency of CIP in a H2O2‐alone system and a novel Bi12FeO20‐H2O2 photo‐Fenton system. It reveals for the first time the presence of a quinone‐imine intermediate in the H2O2‐alone system, which exhibits toxicity comparable to CIP.
Wenting Qiu, Ji Liu, Hengjun Shang, Yaning Zhang, Shuai Dou, Jing Xu, Ying Zhang, Yang Lou, Yongfa Zhu, Chengsi Pan   +9 more
wiley   +1 more source

Multiplexed Tandem Mass Spectrometry Imaging Enables Large‐Scale Isomer Mapping and Annotation in Tissues

Angewandte Chemie, EarlyView.
Parallel mass spectrometry imaging acquires high mass resolution and tandem mass spectrometry images from 108 isolation windows in a single run. Spatial similarity networking clusters product ions by spatial distribution, enabling annotation of isomers and isobars as demonstrated for phospholipids and oxidized cholesterol in mouse and human brain ...
Varun V. Sharma, Gabor Toth, Robert Martinis, Cathrin E. Hansen, Gijs Kooij, Ingela Lanekoff   +5 more
wiley   +2 more sources

Life fingerprints of nuclear reactions in the body of animals [PDF]

, 2010
Nuclear reactions are a very important natural phenomenon in the universe. On the earth, cosmic rays constantly cause nuclear reactions. High energy beams created by medical devices also induce nuclear reactions in the human body.
Ci-yi Liu, Ji-hui Han, Ji-hui Su, Jun Zeng, Qi-yin Sun, Quan-shi Zhang, Tao Sun, Wen-hui Xie, Xiao-jia Cai   +8 more
core   +1 more source

Biotransformation of ent-beyerenes with mucor plumbeus [PDF]

, 2013
Indexación: Web of Science; Scielo.ABSTRACT The microbiological transformation of ent-beyer-15-en-18-ol 1 and ent-beyer-15-en-19-ol 2, using Mucorplumbeus, resulted in hydroxylated products.
Chamy, María Cristina, Orejarena, Silvia, Rovirosa, Juana, San Martin, Aurelio   +3 more
core   +1 more source

Synergistic Interplay of Acceptor and Isovalent Co‐Doping on BaZrO3‐Based Proton Conducting Oxides: A First‐Principles Study

Advanced Science, EarlyView.
Acceptor and isovalent co‐doping effects on hydration in BaZrO3 proton conductors are systematically investigated using first‐principles calculations. Acceptors enhance hydration by modulating oxygen vacancy formation, whereas isovalent dopants enhance hydration by stabilizing protons via increased A‐site cation–proton distances.
Yonghun Shin, Kyung‐Yeon Doh, June Ho Lee, Shin Hyun Kim, Donghwa Lee   +4 more
wiley   +1 more source

Navigating Nitration Chemistry: A Practical Guide to Reagents, Mechanisms, and Selectivity

Angewandte Chemie, EarlyView.
This review highlights key contributions of modern nitration chemistry, emphasizing sustainable mechanistic platforms and comparing the performance of both organic and inorganic reagents across aromatic, ipso‐, olefin, alkyne, and heteroatom nitration. It provides the community with a clearer, unified perspective on current advances and facilitates the
Harry Lecomte, Anthony J. Fernandes, Dmitry Katayev   +2 more
wiley   +2 more sources