Results 181 to 190 of about 219,636 (306)

Landscape-wide cosmogram built by the early community of Aguada Fénix in southeastern Mesoamerica. [PDF]

Sci Adv
Inomata T, Triadan D, Vázquez López VA, García Hernández M, Fernandez-Diaz JC, Sharpe AE, Alvarado C, Flores A, Ceballos X, Hanson KE, Chen R, Beach T, Omori T, Nasu H, Aoyama K, Yamada K, Kitaba I, Nakagawa T.   +17 more
europepmc   +1 more source

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

Chemistry – A European Journal, EarlyView.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

Complex perishable technologies from the North American Great Basin reveal specialized Late Pleistocene adaptations. [PDF]

Sci Adv
Rosencrance RL, Smith GM, McDonough KN, Jazwa CS, Antonosyan M, Kallenbach EA, Connolly TJ, Culleton BJ, Puseman K, McGuinness M, Jenkins DL, Stueber DO, Endzweig PE, Roberts P.   +13 more
europepmc   +1 more source

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

Chemistry – A European Journal, EarlyView.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Progressive failure mechanisms and dynamic load redistribution in asymmetric excavation with partial bracing collapse. [PDF]

Sci Rep
Chong J, Su F, Wei H, Zheng X, Liu F.
europepmc   +1 more source

Post‐LECA Origin and Diversification of an Axonemal Outer Arm Dynein Motor

Cytoskeleton, EarlyView.
ABSTRACT Dyneins were present in the last eukaryotic common ancestor (LECA) and play key roles in eukaryotic biology. Axonemal dyneins form the inner and outer arms that power ciliary beating, and it has long been recognized that outer arms in some organisms contain two different heavy chain motors, whereas those from other species contain a third unit
Stephen M. King
wiley   +1 more source

An interoperable catalogue of Middle and Late Bronze Age settlements in western Anatolia (c. 2000-1200 BCE). [PDF]

Sci Data
Aşınmaz A, Mutlu S, Zangger E.
europepmc   +1 more source

Family's socioeconomic and demographic factors on elements of children's dental and oral health: A scoping review

Clinical and Experimental Dental Research, EarlyView.
Abstract Background Family plays a significant role in children's dental and oral health (DOH) elements, such as children's DOH knowledge and practice, the development of children's dental fear and anxiety (DFA), children's dental visits, and children's DOH status.
Wisnu Fadila, Mugia B. Rahardja, Puguh Prasetyoputra, Anne A. Suwargiani, Yanu E. Prasetyo, Eriska Riyanti   +5 more
wiley   +1 more source

Characteristics stochastic analysis of long and narrow deep excavations under soil spatial variability. [PDF]

Sci Rep
Liu S, Wang Z, Chen Y, Fang G, Zhao Y, Yang J, Sun H.   +6 more
europepmc   +1 more source

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source