Results 111 to 120 of about 295,086 (332)
Taxonomy of Chemical Bondings: Opportunities and Challenges
Angewandte Chemie, EarlyView.The recent focus on supramolecular and nanosized systems produced a major increase in the types of observed noncovalent interactions and in the diversity of terms used to designate them. A hierarchical categorization (taxonomy) of terms used to designate electrophile···nucleophile interactions is proposed here.
Andrea Pizzi +5 more
wiley +2 more sources
Federal Law Review, 2000 “…the concept of the Crown is…deeply ambiguous.”The ambiguity surrounding the concept of the Crown stems from the very many functions that it has been required to perform. One tends to forget that it is merely a type of hat, as Maitland and Lord Simon have observed, so bound up in the symbolism of that headgear has the word become.
openaire +1 more source
Mast years increase wind pollination and reduce seed predation in sugar maple (Acer saccharum)
American Journal of Botany, EarlyView.Abstract Premise In general, mast seeding (intermittent and synchronous seed production) increases plant fitness through economies of scale in which reproduction is more successful in high‐seed years. These benefits have been most studied in wind‐pollinated trees.
Elizabeth E. Crone, Joshua M. Rapp
wiley +1 more source
Effect of axial groove and resin luting cements on the retention of complete cast metal crowns
Dental Research Journal, 2009 Background : The design of the tooth preparation and the cementing medium are important consid-erations in the retention of crowns and fixed partial dentures.
K Rajkumar +5 more
doaj
Orthodontic management of amelogenesis imperfecta: A case report
Clinical Case ReportsKey Clinical Message Amelogenesis imperfecta (AI) is a rare developmental anomaly characterized by poorly developed or absent tooth enamel, which complicates orthodontic treatment due to weak enamel‐bracket bond strength.
Kanistika Jha +3 more
doaj +1 more source
Clinical Implant Dentistry and Related Research, 2015 BACKGROUND Clinical studies on zirconia abutments report very good survival rates and biological and technical results, but few have an observation period of more than 5 years.
A. Zembic +4 more
semanticscholar +1 more source
Dinitrogen Activation with Low‐Valent Strontium
Angewandte Chemie, EarlyView.Although computationally predicted, N2 activation with an in situ generated low‐valent β‐diketiminate (BDI) SrI precursor did not result in a stable complex. First dinitrogen fixation with Sr was achieved using a heterobimetallic approach. This highly reducing product vigorously reacts with Teflon.
Michael Morasch +7 more
wiley +2 more sources
Solvent‐Directed Handedness in a Chirally Twisted Tetrakisporphyrin Macrocycle
Asian Journal of Organic Chemistry, EarlyView.A chirally twisted tetrakisporphyrin macrocycle was synthesized by incorporating a chiral dioxolane into a tetrakisporphyrin macrocycle. The solvent type influenced the preferred handedness of the twisted conformation. Circular dichroism measurements and computational analyses determined the handedness of the conformers in solvents toluene and ...
Kouta Tanabe +2 more
wiley +1 more source
Fracture Strength of Aged Monolithic and Bilayer Zirconia-Based Crowns
BioMed Research International, 2015 The purpose of this study was to evaluate the effect of design and surface finishing on fracture strength of yttria-tetragonal zirconia polycrystal (Y-TZP) crowns in monolithic (1.5 mm thickness) and bilayer (0.8 mm zirconia coping and 0.7 mm porcelain ...
D. P. Lameira +3 more
semanticscholar +1 more source