Results 111 to 120 of about 116,302,490 (197)

Reversible Assembly and Disassembly of σ‐Aromatic B3 Rings

open access: yesChemistry – A European Journal, EarlyView.
B3 rings are the smallest σ‐aromatic boron compounds. Here, we show for the first time that cationic diboranes with an electron‐precise (2c,2e) bond can be reversibly converted to σ‐aromatic B3 rings with electron‐deficient (3c,2e) bonding. Base‐induced disassembly of the B3 ring leads back to cationic diboranes and monoborane adducts.
Julian Krauß   +4 more
wiley   +1 more source

Aku bersyukur menjadi Wanita

open access: yes, 2001
Rekaman Ceramah Hj. Drs.
Hj, Sungkar, Lutfiah
core  

Non‐Invasive Estimation of Systemic Drug Exposure Using Exhaled Breath Metabolomics in Humans: A Translational Proof‐of‐Concept Study

open access: yesClinical Pharmacology &Therapeutics, EarlyView.
Accurate assessment of systemic drug exposure in humans remains challenging, as conventional approaches rely on intermittent blood sampling and laboratory‐based assays that are invasive and provide limited temporal resolution. Exhaled breath contains volatile and semi‐volatile compounds arising from drug metabolism and downstream biological processes ...
Kai Fricke   +12 more
wiley   +1 more source

Dynamic monitoring of drought using HJ-1 and MODIS time series data in northern China

open access: yes, 2013
From early November 2008 to February 2009, lack of rainfall led to severe drought in northern China. More than 9.3 million ha of wheat in six major crop production provinces, including Henan, Anhui, Shandong, Shanxi, Gansu, and Shaanxi, were hit by ...
Xu X. L.   +3 more
core  

Work as a Lever for Sustainability Transitions: Measuring Experienced Workplace Sustainability and Its Link to Agency and Well‐Being

open access: yesCorporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Humanity's environmental and social trajectory is substantially shaped by routinised decision‐making in professional contexts. At work, individuals engage in public‐sphere actions, simultaneously embedded in structural conditions limiting or catalysing potential impact. Despite its relevance for societal learning and sustainability transitions,
Jorrit Holst   +3 more
wiley   +1 more source

Perceived importance and didactic difficulty of chemistry education: Insights from Czech teachers

open access: yesThe Curriculum Journal, EarlyView.
Abstract This empirical study examines how chemistry teachers in lower and upper secondary schools in the Czech Republic evaluate the content of the chemistry curriculum, focussing on its perceived importance and didactic difficulty. Based on a quantitative survey (N = 146), the study provides insight into the pedagogical content knowledge of ...
Jitka Lorenzová   +6 more
wiley   +1 more source

Coupling Selective Organic Oxidation With Hydrogen Evolution Over Metal Halide Perovskite Photocatalysts: Halide‐Dependent Design, Mechanisms, and Stability Challenges

open access: yesEcoEnergy, EarlyView.
This Review highlights how metal halide perovskites enable coupled selective organic oxidation and hydrogen evolution under visible light. It summarizes halide‐dependent design principles, surface engineering strategies, reaction mechanisms, and stability challenges, providing guidance for developing efficient and durable photocatalytic systems ...
Jutarat Jitrada   +4 more
wiley   +1 more source

Lattice and Surface Engineering of Transition Metal Oxide Photoanodes for Efficient Photoelectrochemical Water Splitting

open access: yesEcoEnergy, EarlyView.
This review highlights phase control, facet control, and atomic vacancy engineering as key strategies to enhance charge transport, light harvesting, and surface activity in PEC photoanodes. ABSTRACT Photoelectrochemical (PEC) water splitting is a promising approach for converting solar energy into hydrogen, yet the performance of transition metal oxide
Seonmi Ko   +5 more
wiley   +1 more source

Symmetry Breaking of FeN4 by Interlaminar Oxygen‐Bonded Vacancy Defect Toward Efficient Oxygen Reduction Reaction

open access: yesEcoEnergy, EarlyView.
The adjacent vacancy defect bonded with interlaminar oxygen breaks the symmetry of FeN4 active site, facilitating the *OH desorption and lowering the reaction overpotential, ultimately enhancing the intrinsic catalytic activity of the Fe center. ABSTRACT Developing highly efficient non‐noble iron‐nitrogen‐carbon (Fe‐N‐C) catalysts with FeN4 active ...
Liqun Liu   +6 more
wiley   +1 more source

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