Results 81 to 90 of about 8,902 (203)
Synthesis and Structure of an S‐Shaped Double Expanded Helicene With Seven Fused Anthracene Units
Chemistry – A European Journal, Volume 32, Issue 35, 19 September 2026.The anthracene‐fused aromatic compound was synthesized by four‐fold cycloisomerization of the corresponding alkyne precursor. X‐ray crystallographic analysis revealed that this compound had a double helical structure of Ci symmetry, in which the terminal and central anthracene units were triply stacked.
Shinji Toyota +6 more
wiley +1 more source
Aromaticity in Octahedral Cyclopentadienylberyllium Transition Metal Clusters
European Journal of Inorganic Chemistry, Volume 29, Issue 26, 16 September 2026.Density functional theory studies on (CpBe)6M (M = Mn to Cu) complexes related to the experimentally known (CpBe)6Ni predict octahedral or distorted octahedral structures. The CpBe ligands are weak‐field ligands stabilizing high formal transition metal oxidation states by pπ → dπ forward electron donation to the central transition metal. (CpBe)6Ni is a
Huidong Li +7 more
wiley +1 more source
Knowledge and Management of Aquatic Ecosystems, 2011 Indigenous crayfish species (ICS) are under threat in Europe; due to competition from invasive non-indigenous crayfish species (NICS) from crayfish plague, which is carried by introduced American crayfish, and habitat degradation.
Peay S., Füreder L.
doaj +1 more source
Journal of Global Antimicrobial ResistanceObjective: Nontuberculous mycobacterial pulmonary disease (NTM–PD) and multidrug-resistant pulmonary tuberculosis (MDR-PTB) share overlapping clinical and radiological features, leading to frequent misdiagnosis and inappropriate treatment.
Ming Chang +3 more
doaj +1 more source
Stability Analysis and Design of Negative Impedance Converters: application to circuit and small antennas [PDF]
Radioengineering, 2016 Negative impedance converters (NICs) have been proposed as structures to improve the performance of RF circuits and electrically small antennas. However, NICs suffer from stability problems.
D. Segovia-Vargas +5 more
doaj
NICS: The TNG Near Infrared Camera Spectrometer
, 2001 NICS (the Near Infrared Camera Spectrometer) is a cooled near-infrared camera-spectrometer that has been developed by the Arcetri Infrared Group at the Arcetri Astrophysical Observatory, in collaboration with the CAISMI-CNR for the TNG (the Italian ...
Checcucci A +16 more
core +3 more sources
Which NICS Aromaticity Index for Planar π Rings Is Best?
, 2016 Five increasingly sophisticated aromaticity indexes, based on nucleus-independent chemical shifts (NICS), were evaluated against a uniform set of aromatic stabilization energies (ASE) for 75 mono- and polyheterocyclic five-membered rings.
Clémence Corminboeuf (2480206) +4 more
core +1 more source
Number of newly-infected corals (NICs).
, 2015 The red dots represent the number of NICs observed in the field along the studied year. The grey dots represent the median number of NICs as predicted by generating infections according to the SIS epidemic model based on Eq 2 (see text), and the grey ...
Assaf Zvuloni (251032) +4 more
core +1 more source
Microbial Community and Functional Analysis of Regionally Produced Traditional Korean Grain Vinegar
MicroorganismsThis study investigated changes in microbial communities and functional components during the fermentation of traditional Korean grain vinegars collected from various regions as well as the correlations among these components.
Su Jeong Lee +3 more
doaj +1 more source
HeliyonThe selection of the finest possible embryo in in-vitro fertilization (IVF) was crucial and revolutionary, particularly when just one embryo is transplanted to lessen the possibility of multiple pregnancies.
Hui He +13 more
doaj +1 more source