Anion-dependent assembly of Dy complexes: structures and magnetic behaviors

CrystEngComm ◽  
2015 ◽  
Vol 17 (27) ◽  
pp. 5066-5073 ◽  
Author(s):  
Peng Chen ◽  
Meiqi Zhang ◽  
Wenbin Sun ◽  
Hongfeng Li ◽  
Lang Zhao ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Distinct Species

The in situ reaction of 2-aldehyde-8-hydroxyquinoline, histamine and LnX3·6H2O (X− = OAc−, NO3− and ClO4−) affords three distinct species of eight lanthanide complexes.

Evolution of early Eocene Palaeosinopa (Mammalia, Pantolestidae) in the Willwood Formation of the Bighorn Basin, Wyoming

2015 ◽  
Vol 89 (4) ◽  
pp. 665-694 ◽  
Author(s):  
Rachel H. Dunn ◽  
Kenneth D. Rose
Keyword(s):  
Morphological Evolution ◽  
Distal Tibia ◽  
Distinct Species ◽  
Powder River Basin ◽  
Ancestral Population ◽  
Bighorn Basin ◽  
New Material ◽  
Size And Morphology ◽  
Willwood Formation

AbstractSpecies-level diversity and evolution of Palaeosinopa from the Willwood Formation of the Bighorn Basin is reassessed based on substantial new material from the Bighorn, Powder River, and Wind River basins. We recognize three species of Palaeosinopa in the Willwood Formation of the Bighorn Basin: P. lutreola, P. incerta, and P. veterrima. The late Wasatchian species P. didelphoides is not present in the Bighorn Basin. The Willwood species can be differentiated based only on size. P. veterrima is the most common and wide-ranging species and is the most variable in size and morphology: the stratigraphically lowest individuals are smaller, with narrower, more crestiform lower molars; whereas the highest are larger, with wider, more bunodont teeth. Although it could be argued that these represent distinct species, we demonstrate that this morphological evolution occurred as the gradual and mosaic accumulation of features, suggesting in situ anagenetic evolution. The two smaller species are present only low in the section (biochrons Wa0–Wa4) and show no discernable evolution in size or morphology. A new skeleton of Palaeosinopa veterrima from the Willwood Formation is described, and other new postcrania are reported. The skeleton is the oldest associated skeleton of Palaeosinopa known, yet it is remarkably similar to those of younger, more derived pantolestids, the primary disparities being minor differences in proportions of the innominate, femur, and tibia, and co-ossification of the distal tibia and fibula. Either P. incerta or P. lutreola was likely the ancestral population that gave rise to the other Wasatchian Palaeosinopa. Alternatively, P. veterrima may have migrated into the Bighorn Basin from the Powder River Basin.

Cherenkov Radiation‐Mediated In Situ Excitation of Discrete Luminescent Lanthanide Complexes

2018 ◽  
Vol 130 (47) ◽  
pp. 15722-15725
Author(s):  
Alexia G. Cosby ◽  
Shin Hye Ahn ◽  
Eszter Boros
Keyword(s):  
Lanthanide Complexes ◽  
Cherenkov Radiation

scholarly journals In situ synthesis of lanthanide complexes supported by a ferrocene diamide ligand: extension to redox-active lanthanide ions

2015 ◽  
Vol 39 (10) ◽  
pp. 7696-7702 ◽  
Author(s):  
Wenliang Huang ◽  
Jonathan L. Brosmer ◽  
Paula L. Diaconescu
Keyword(s):  
Rare Earth ◽  
Lanthanide Complexes ◽  
In Situ Synthesis ◽  
Lanthanide Ions ◽  
Redox Active

The scope of an in situ method to prepare rare-earth alkyl and halide precursors was extended to cerium, praseodymium, samarium, terbium, thulium, and ytterbium.

Chemical Interactions in Ionomers and Ionomer Membranes Containing Metal particles and Ions

1999 ◽  
Vol 575 ◽  
Author(s):  
William M. Risen
Keyword(s):  
Fuel Cells ◽  
Metal Ions ◽  
Small Molecules ◽  
Distinct Species ◽  
Pem Fuel Cells ◽  
Metal Particles ◽  
Metal Carbonyls ◽  
Ionomer Membranes ◽  
Low Temperature Fuel Cells

ABSTRACTIonomer membranes are employed in PEM fuel cells as the proton conducting element, but they also hold potential for catalytic applications in both hydrogen based and other low temperature fuel cells. In these applications the reactions of H2, CO, 02, H20 and other small molecules with metal-based catalysts are important to consider. Reactions of these species with perfluorocarbonsulfonic acid based ionomers (PFSA), of which Nafionsa are prototypical, containing Rh, Ru, Pt and other metal ions and particles are shown. Metal carbonyls form with metal ions that have been reduced in situ to reduced valence ions or to metal particles, by the combination of CO and H2O or with H2 directly. Metal nitrogen complexes also can be formed. In addition, the interactions of dissimilar metal ions leads to distinct species with NO or CO, for example, that are different from the products with either ion separately.

The specific identity of the algal symbiont in Convoluta roscoffensis

1967 ◽  
Vol 47 (2) ◽  
pp. 445-464 ◽  
Author(s):  
Mary Parke ◽  
Irene Manton
Keyword(s):  
Water Samples ◽  
Distinct Species ◽  
Free Living ◽  
Algal Symbiont ◽  
New Information ◽  
Golgi System ◽  
Electron Microscopes ◽  
Convoluta Roscoffensis ◽  
Specific Identity

The algal symbiont of Convoluta roscoffensis (Graff) has been studied with the light and electron microscopes both in situ in worms collected from four localities on the coast of Brittany and in various forms of isolates in culture. The same organism has also been obtained from populations of free-living monads collected from sand and water samples adjacent to the Convoluta colonies. Its structure and behaviour in culture are described and illustrated. Platymonas convolutae sp.nov. is a very distinct species with a rough-surfaced theca and a pyrenoid with some new characters not previously recorded in other members of the group. Some new information on scale and theca production from the Golgi system has also been obtained.

scholarly journals Retrieval of atmospheric CH<sub>4</sub> vertical information from TCCON FTIR spectra

2019 ◽  
Author(s):  
Minqiang Zhou ◽  
Bavo Langerock ◽  
Mahesh Kumar Sha ◽  
Nicolas Kumps ◽  
Christian Hermans ◽  
...  
Keyword(s):  
Mole Fraction ◽  
Distinct Species ◽  
Satellite Observations ◽  
Total Carbon ◽  
Systematic Uncertainties ◽  
Time Period ◽  
Accuracy And Precision ◽  
Retrieval Software ◽  
Total Column

Abstract. TCCON (Total Carbon Column Observing Network) column-averaged dry air mole fraction of CH4 (XCH4) measurements have been widely used to validate satellite observations and to estimate model simulations. The GGG2014 code is the standard TCCON retrieval software performing a profile scaling retrieval. In order to obtain several vertical information in addition to total column, in this study, the SFIT4 retrieval code is applied to retrieve CH4 mole fraction vertical profile using TCCON spectra (SFIT4TCCON) at six sites (Ny-Ålesund, Sodankylä, Bialystok, Bremen, Orléans and St Denis) during the time period of 2016−2017. The retrieval strategy of SFIT4TCCON is investigated. The degree of freedom for signal of the SFIT4TCCON retrieval is about 2.4, with two distinct species of information in the troposphere and in the stratosphere. The averaging kernel and error budget of the SFIT4TCCON retrieval are presented. The data accuracy and precision of the SFIT4TCCON retrievals, including the total column and two partial columns (in the troposphere and stratosphere), are estimated by TCCON standard retrievals, ground-based in situ measurements, ACE-FTS satellite observations, TCCON proxy data and AirCore measurements. By comparison against TCCON standard retrievals, it is found that the retrieval uncertainty of SFIT4TCCON XCH4 is similar to that of TCCON standard retrievals with the systematic uncertainty within 0.35 % and the random uncertainty about 0.5 %. The tropospheric and stratospheric XCH4 from SFIT4TCCON retrievals are assessed by comparing with AirCore measurements at Sodankylä, and there is a 1.2 % overestimation in the SFIT4TCCON tropospheric XCH4 and a 4.0 % underestimation in the SFIT4TCCON stratospheric XCH4, which are within the systematic uncertainties of SFIT4TCCON retrieved partial columns in the troposphere and stratosphere, respectively.

Unraveling the Asteromenia peltata species complex with clarification of the genera Halichrysis and Drouetia (Rhodymeniaceae, Rhodophyta)

2006 ◽  
Vol 84 (10) ◽  
pp. 1581-1607 ◽  
Author(s):  
Gary W. Saunders ◽  
Christopher E. Lane ◽  
Craig W. Schneider ◽  
Gerald T. Kraft
Keyword(s):  
Western Australia ◽  
North Atlantic ◽  
Distinct Species ◽  
Senior Author ◽  
Anatomical Features ◽  
Lord Howe Island ◽  
Tropical North Atlantic ◽  
Eastern Australia ◽  
Houtman Abrolhos Islands

The senior author was fortunate in 1996 to dive on the remote Houtman Abrolhos Islands of Western Australia and view in situ the stunning “ Asteromenia peltata ” that is so strikingly illustrated by John Huisman (viewable on AlgaeBase). Five years later, during excursions to Bermuda and Lord Howe Island (tropical eastern Australia), he observed and collected specimens referable to this species in both these localities. Based on their respective appearances in the field, it seemed unlikely that these entities from geographically remote regions represented the same species. Our molecular results not only confirm this suspicion, but further indicate that A. peltata sensu lato constitutes a complex of at least five distinct species. We restrict A. peltata to one of two species found in the western (sub)tropical North Atlantic, the second described herein as A. bermudensis sp. nov. Samples from Western Australia represent an undescribed species, A. exanimans sp. nov., while two entities collected from Lord Howe Island (A. anastomosans (Weber-van Bosse) comb. nov. and A. pseudocoalescens sp. nov.) conform to records variously reported as Asteromenia peltata and Drouetia coalescens . Specimens of D. coalescens from South Africa are also not representative of the genus Drouetia , but form a novel lineage within the Rhodymeniaceae. We included two species of Halichrysis in our molecular analyses and, in combination with observations of salient anatomical features, provide arguments for maintaining Asteromenia, Drouetia, and Halichrysis as distinct genera.

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