Results 31 to 40 of about 11,676 (143)

A Portable and Dual‐Button Microneedle Device Enables Intelligent Multimodal Laser Sensing

open access: yesAdvanced Science, EarlyView.
A portable and dual‐button microneedle device enables rapid interstitial fluid sampling. Coupled with multimodal laser sensing and AI‐assisted data processing, the platform enables simultaneous molecular and elemental analysis for minimally invasive and multiplexed health assessment toward point‐of‐care diagnostics.
Yuanchao Liu   +12 more
wiley   +1 more source

A Strong Lewis Acidic Diethylsilylium Catalyst for Direct Sulfonamidation of Challenging Ketones

open access: yesAdvanced Science, EarlyView.
Low‐substitution‐order silylium ions (R2HSi+) exhibit exceptional Lewis acidic activity. We report diethylsilylium‐catalyzed reductive sulfonamidation of functionalized ketones to access β‐amino esters. The in situ generated ion pair shows enhanced reactivity, with diethylsilane serving as both reductant and precatalyst. The developed protocol proceeds
Woo Hee Kim   +5 more
wiley   +1 more source

Entre o funcional e o lúdico: a camisinha nas campanhas de prevenção da aids

open access: yesInterface: Comunicação, Saúde, Educação, 2000
Este trabalho parte da idéia da existência de impedimentos ao uso da camisinha. Abordou-se alguns desses impedimentos que são as significações marginais como a infidelidade e a promiscuidade que a camisinha encarna.
Mônica Benfica Marinho
doaj   +1 more source

Computation‐Guided Control of Excited‐State Deactivation through Modulation of Conical‐Intersection Accessibility by Donor–Acceptor Asymmetry in Bridged Stilbene AIE Luminogens

open access: yesAdvanced Science, EarlyView.
Donor–acceptor asymmetry modulates conical‐intersection accessibility and topology in bridged stilbenes, providing mechanistic insight into excited‐state deactivation and aggregation‐induced emission (AIE). ABSTRACT A computation‐guided investigation of asymmetric donor–acceptor bridged stilbenes reveals structure–property relationships governing ...
Takuya Tanaka   +8 more
wiley   +1 more source

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement

open access: yesGeophysical Monograph Series, Page 27-82., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm   +2 more
wiley  

+1 more source

Phase‐Resolved Dual Control of Phenol Photodissociation at the Air–Water Interface From Structure‐Resolved Statistics

open access: yesAdvanced Science, EarlyView.
Faster phenol photolysis at the air–water interface arises from two cooperative factors: a more favorable initial microenvironment for solvent‐side electron stabilization, which lowers CI access, and a more labile hydrogen‐bond network, which more readily reorganizes to stabilize the dark‐state intermediate.
Qiang Yin   +8 more
wiley   +1 more source

Sexo y prevención: representaciones sociales del condón en adultos mexicanos

open access: yesHorizonte Sanitario, 2019
Objetivo: Analizar las representaciones sociales del condón en adultos mexicanos. Material y métodos: Se llevó a cabo un estudio desde una perspectiva pluri metodológica, ya que se realizaron procedimientos cuantitativos y cualitativos con el apoyo
Oscar Alejandro Palacios Rodríguez   +3 more
doaj   +1 more source

Unpacking the Farmland Capitalization Effect of Ethanol Establishment

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT We unpack the impact of expansions in ethanol production—as measured by proximity to newly constructed ethanol plants and capacity expansions—on farmland values using land transaction data from Kansas in combination with modern causal inference techniques.
Gabriel S. Sampson, Jisang Yu
wiley   +1 more source

Ein reversibler 900‐nm‐Nahinfrarot‐Photoschalter für unsichtbar lichtbeschreibbare 2D‐ und 3D‐Displays

open access: yesAngewandte Chemie, EarlyView.
Der peri‐benzo[a]fluoranthenthioindigo (PBFT) Photoschalter kann direkt durch Nahinfrarot‐Licht mit Wellenlängen bis zu 900 nm angeregt werden. Er bietet ein hochperformantes Eigenschaftsprofil mit kontrastreichen Farbänderungen zwischen blassgrün und tiefblau.
Elias Ciekalski, Henry Dube
wiley   +1 more source

Percepciones sobre el uso del condón y la sexualidad entre jóvenes

open access: yesRevista Latinoamericana en Ciencias Sociales, Niñez y Juventud, 2012
El objetivo fue determinar la relación entre percepciones sobre el uso del condón y la actividad sexual de riesgo en jóvenes universitarios y universitarias.
J. Isaac Uribe   +3 more
doaj  

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