Results 41 to 50 of about 11,676 (143)

Salud sexual y reproductiva en población adolescente y adulta en México, 2022

Salud Pública de México, 2023
Objetivo. Caracterizar la situación de la salud sexual y reproductiva (SSR) en población adolescente (10-19) y adulta (20-49). Material y métodos. Utilizando la Encuesta Nacional de Salud y Nutrición 2022, se estimaron prevalencias e intervalos de ...
Celia Hubert López, Leticia Suárez-López, Elvia de la Vara-Salazar, Aremis Villalobos   +3 more
doaj   +1 more source

A Reversible 900 nm Near‐Infrared Photoswitch for Invisibly Writable 2D and 3D Displays

Angewandte Chemie International Edition, EarlyView.
The peri‐benzo[a]fluoranthenethioindigo (PBFT) photoswitch enables direct excitation with near‐infrared light up to 900 nm wavelengths. It delivers a high‐performance property profile including high‐contrast color changes between bright green and deep blue.
Elias Ciekalski, Henry Dube
wiley   +1 more source

Factores asociados con el uso del preservativo en jóvenes universitarios

Revista Ciencias de la Salud
Introducción: En el mundo, se ha evidenciado el incremento de embarazos no planeados y enfermedades de trasmisión sexual, Virus de Inmunodeficiencia Humana (ETS/VIH) centrándose en la población adolescente y adulta por optar conductas riesgosas en su ...
Carlos Andrés Quiroz Mora, Claudia Patricia Valencia Molina, Angélica María Soto González, Robinson Pacheco López, Mauricio Hernández Carrillo   +4 more
doaj   +1 more source

Decoupling Redox Potentials and Excited State Energies in Substituted Chromium(III) Chromophores

Chemistry – A European Journal, EarlyView.
Redox and excited state properties of organic and precious metal CT photocatalysts are strongly entangled. In contrast, redox potentials of polypyridine chromium(III) complexes, that feature purely metal‐centered SF states, are selectively tuned by incremental substituent effects of the CF3 group, while excited state energies and lifetimes remain ...
Steven Sittel, Dimitri Zorn, Alexandra König, Jonas Marcel Grenz, Christoph Förster, Robert Naumann, Katja Heinze   +6 more
wiley   +1 more source

Comportamiento sexual en estudiantes de Ciencias Médicas Mayabeque: uso del condón y la prevención de ITS

Universidad Médica Pinareña, 2023
Introducción: la baja incidencia en el uso del condón expone a las personas y en especial a jóvenes y adolescentes a practicar conductas sexuales de riesgo exponiéndose a contraer alguna infección de transmisión sexual.
Ilian Estaban Tarife Romero, Luis Manuel Abreu Pereira, Leyanis González Baigorría, Daylen Echenique Marrero, Aliena Pérez Ramos   +4 more
doaj  

Dual Acid Responses of Stable Luminescent Diphenylpyridylmethyl Radicals With Additional Pyridyl Groups

Chemistry – A European Journal, EarlyView.
To expand the acid‐responsive behavior of diphenylpyridylmethyl stable luminescent radicals, additional pyridyl groups were introduced. Dual acid responsiveness was observed, involving both the newly incorporated pyridyl groups and the PyBTM moieties.
Yohei Hattori, Kojiro Nakagawa, Kingo Uchida, Gwénaël Rapenne   +3 more
wiley   +1 more source

A Bio‐Based Chiroptical Overcrowded Alkene From Flavanone: Photoreactivity and Theoretical Investigation

Chemistry – A European Journal, EarlyView.
A sustainable route to photoresponsive molecular systems is achieved using the bio‐based flavanone (‐)‐isolonchocarpin from Tephrosia vogelii. Through McMurry homocoupling and light‐driven 6‐π‐electrocyclization, an overcrowded alkene and a fluorescent O‐heterocyclic phenanthrene are synthesized.
Deryl H. Limawan, Adrien Combe, Anthony Bongso, Bayu Dwiputra, Atthar L. Ivansyah, Roza R. Weber, Charlotte N. Stindt, Robby Roswanda, Ben L. Feringa   +8 more
wiley   +1 more source

Anisotropy Factor Spectra for Weakly Allowed Electronic Transitions in Chiral Ketones

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Anisotropy factor spectra for the weak n→π*‐type A‐band of chiral ketones cannot be described within the Franck–Condon approximation. Thus, we present such spectra computed by accounting for Herzberg–Teller corrections and compare them to experiments for fenchone, camphor and 3MCP to describe chiroptical properties of these molecules in the mid to near
Leon A. Kerber, Oliver Kreuz, Tom Ring, Hendrike Braun, Robert Berger, Daniel M. Reich   +5 more
wiley   +1 more source

Longitudinal and Daily Links Between Impulsivity and Prosocial Behavior: The Moderating Role of Positive Risk‐Taking

Journal of Adolescence, EarlyView.
ABSTRACT Introduction There is a growing interest in positive risk‐taking (PRT) during adolescence and young adulthood. Emerging evidence has documented positive associations of PRT with multiple positive adolescent socioemotional developmental outcomes, including prosocial behavior.
Weiyu Edith Chen, Hao Zheng, Yao Zheng
wiley   +1 more source

Are Online Social Experiences Associated With General Interpersonal Problems? A Circumplex Assessment

Journal of Clinical Psychology, EarlyView.
ABSTRACT Objective Social media use can promote social connection but also often includes negative experiences, raising questions about its associations with broader interpersonal functioning. Methods This preregistered study used the interpersonal circumplex (IPC) to examine associations of self‐reported online social support and negativity, and ...
Timothy W. Smith, Giovanni Marquez, Dakota A. Dolister, Bert N. Uchino, Kevin D. Jordan   +4 more
wiley   +1 more source