Results 71 to 80 of about 1,147 (180)

Umgehung von Ammoniak: Von N2 zu stickstoffhaltigen Heterocyclen ohne N1‐Zwischenprodukte oder Übergangsmetalle

open access: yesAngewandte Chemie, Volume 136, Issue 21, May 21, 2024.
Zwei neue heterocyclische Verbindungen werden aus Diboradiazenverbindungen synthetisiert und vervollständigen damit zweistufige Syntheserouten zu komplexen N‐Heterocyclen aus N2, die sowohl den Bedarf an Übergangsmetallreagenzien als auch das klassische Zwischenprodukt Ammoniak vollständig vermeiden und umgehen.
Marco Weber   +10 more
wiley   +1 more source

Bypassing Ammonia: From N2 to Nitrogen Heterocycles without N1 Intermediates or Transition Metals

open access: yesAngewandte Chemie International Edition, Volume 63, Issue 21, May 21, 2024.
Two new heterocyclic species are prepared from diboradiazene compounds, thus completing two‐step routes to complex N‐heterocycles from N2 that both circumvent the need for transition metal reagents and completely bypass the traditional intermediate ammonia.
Marco Weber   +10 more
wiley   +1 more source

Analysis of Weighted Factors Influencing Submarine Cable Laying Depth Using Random Forest Method

open access: yesApplied Sciences
This study addresses the limitations of traditional methods used to analyze factors influencing submarine cable burial depth and emphasizes the underutilization of cable construction data.
Chao Lyu, Xiaoqiang Zhou, Shuang Liu
doaj   +1 more source

The shapeshifting Helicobacter pylori: From a corkscrew to a ball

open access: yesMolecular Microbiology, Volume 121, Issue 2, Page 260-274, February 2024.
Helicobacter pylori transforms from helical rods to spherical coccoids when faced with various stresses, including starvation and temperature fluctuations. While it remains controversial whether the latter form is dormant or degenerative, a great deal of overlooked evidence points toward the existence of both.
Thimoro Cheng, Ivo Gomperts Boneca
wiley   +1 more source

Multiobjective Optimization of Diesel Particulate Filter Regeneration Conditions Based on Machine Learning Combined with Intelligent Algorithms

open access: yesInternational Journal of Intelligent Systems, Volume 2024, Issue 1, 2024.
To reduce diesel emissions and fuel consumption and improve DPF regeneration performance, a multiobjective optimization method for DPF regeneration conditions, combined with nondominated sorting genetic algorithms (NSGA‐III) and a back propagation neural network (BPNN) prediction model, is proposed. In NSGA‐III, DPF regeneration temperature (T4 and T5),
Yuhua Wang   +7 more
wiley   +1 more source

Microwave-assisted extraction of isoangustone A from Derris scandens (Roxb.) Benth. using a hydrophobic deep eutectic solvents-based microemulsion

open access: yesAdvances in Sample Preparation
The aim of this research was to develop a new extraction method combining hydrophobic deep eutectic solvent (HDES)-based microemulsion systems with microwave-assisted extraction (MAE) technology to enhance the extraction efficiency of isoangustone A ...
Benyatip Buajan   +6 more
doaj   +1 more source

Studying patterns of individual development by I-States as Objects Analysis (ISOA)

open access: yes, 2010
I-States-as-Objects-Analysis (ISOA) is a methodology for studying short-term developmental stability and change in patterns of variable values. The theoretical rationale for this methodology is the person-oriented research paradigm. A key concept is the &
Bergman, Lars R.,, Nurmi, Jari-Erik,
core  

A COMPARATIVE STUDY BETWEEN JOINT MOBILIZATION AND CONVENTIONAL PHYSIOTHERAPY IN KNEE OSTEOARTHRITIS

open access: yesInternational Journal of Physiotherapy, 2016
Background: Osteoarthritis (O.A.) is an active disease process involving articular cartilage destruction, subchondral bone thickening and new bone formation. Worldwide osteoarthritis is estimated to be the fourth leading cause of disability, in which 10%
Aftab Ahmad, Muhammad Daud
doaj   +1 more source

Binding stoichiometry.

open access: yes, 2015
Mole ratio plot of Isoa-DNA system.
Marco Deiana (753999)   +5 more
core   +1 more source

Efecto de la adicción de nitrógeno, energía e isoacidos a la pulpa fresca del henequén sobre el crecimiento del borrego pelibuey en confinamiento

open access: yesRevista Mexicana de Ciencias Pecuarias, 1981
Se realizaron 2 experimentos con objeto de estudiar la respuesta del borrego pelibuey en crecimiento, alimentado con una dieta a bue de pulpa de henequén fresca (Agave fourcroydes) suplementada con diversas fuentes nitrogenadas, energéticas con o sin ...
Armando Rodríguez   +3 more
doaj  

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