Results 41 to 50 of about 6,808,532 (295)

Natural Hydroxyapatite: Green Catalyst for the Synthesis of Pyrroles, Inhibitors of Corrosion

Journal of Chemistry, 2021
Polysubstituted pyrroles have been synthesized in good yields via a four-component one-pot reaction of 1,3-dicarbonyl compounds, amines, aldehydes, and nitroalkanes using natural hydroxyapatite (HAp) as an efficient green catalyst. This strategy provides
Abdelhadi Louroubi, Abdallah Nayad, Ali Hasnaoui, Rachid Idouhli, Abdessalam Abouelfida, Larbi El Firdoussi, Mustapha Ait Ali   +6 more
doaj   +1 more source

Microbiome−host proteostasis crosstalk—An emerging perspective on mechanisms and interventions toward healthy longevity

FEBS Letters, EarlyView.
Proteostasis and the gut microbiota play a key role in shaping host physiology. Microbiota‐derived metabolites, vitamins, and RNA modulate host proteostasis. Findings from model systems, including C. elegans, indicate microbes can either stabilize or disrupt host proteostasis.
Abhishek Anil Dubey, Maria Ermolaeva
wiley   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Modulating the Structure and Composition of Single‐Atom Electrocatalysts for CO2 reduction

Advanced Science
Electrochemical CO2 reduction reaction (eCO2RR) is a promising strategy to achieve carbon cycling by converting CO2 into value‐added products under mild reaction conditions.
Weiren Chen, Xixiong Jin, Lingxia Zhang, Lianzhou Wang, Jianlin Shi   +4 more
doaj   +1 more source

Recent Progress in Heteroatom-Containing Metalloporphyrin-Based Catalysts for CO₂ Reduction

Molecules
Metalloporphyrins, owing to their structural resemblance to natural enzyme active sites and highly tunable coordination environments, have emerged as promising catalysts for converting CO2 into value-added chemicals and fuels.
Zhuo Li, Qianqian Wei, Zhixin Ren, Jing Xie   +3 more
doaj   +1 more source

Aromatic and nutritional profile of an Amazonian autochthonous species, Caramuri Pouteria elegans (A.DC.) Baehni

International Journal of Food Properties, 2019
The aim of this study was to characterize Caramuri Pouteria elegans (A.DC.) Baehni, an exotic fruit of the Amazonian biome to highlight it is a new source nutritional potential.
Jaime Paiva Lopes Aguiar, Edson Pablo da Silva, Raimundo Carlos Pereira Junior, Dionisia Nagahama, Francisca das C. Do A. Souza   +4 more
doaj   +1 more source

Cause analysis for unsatisfactory results in proficiency testing activities: a case study of Brazilian calibration laboratories accredited under ISO/IEC 17025:2005⋆ [PDF]

International Journal of Metrology and Quality Engineering, 2013
This work presents the results of a survey carried out among Brazilian calibration laboratories accredited under ISO/IEC 17025:2005 with the objective to identify how these laboratories investigate the root causes of unsatisfactory ...
Silva M.A.F., Moura M.H., Nogueira R., Costa S.R.R.   +3 more
doaj   +1 more source

Design and analysis strategies for robust microbiome ageing research

FEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik, İsmail Güderer, Yi Wang, Tayyaba Alvi, Prasoon Pandey, Handan Melike Dönertaş   +5 more
wiley   +1 more source

Modulating the coordination environment of cobalt porphyrins for enhanced electrochemical nitrite reduction to ammonia

Carbon Energy
Electrocatalytic reduction of nitrate pollutants to produce ammonia offers an effective approach to realizing the artificial nitrogen cycle and replacing the energy‐intensive Haber‐Bosch process.
Jingwei Han, Hai Sun, Fengkun Tian, Wenwen Zhang, Zonghang Zhang, Ping She, Jun‐Sheng Qin, Heng Rao   +7 more
doaj   +1 more source

Construction of Ni single-atom coordinated with doped N and S elements for mild hydrogenation of methyl acrylate to methyl propionate

Nano Research
Although the nickel-based catalyst is able to exhibit comparative catalytic activity to noble metal for methyl acrylate hydrogenation, it requires strict reaction condition, which can be improved by regulation of coordination environment.
Taolue Sun, Chen Jian, Gang Wang, Hui Zhao, Guoliang Zhang, Zengxi Li, Chunshan Li   +6 more
doaj   +1 more source