Strongest Atomic Physics Bounds on Noncommutative Quantum Gravity Models.

Investigations of possible violations of the Pauli exclusion principle represent critical tests of the microscopic space-time structure and properties. Space-time noncommutativity provides a class of universality for several quantum gravity models. In this context the VIP-2 lead experiment sets the strongest bounds, searching for the Pauli exclusion principle violating atomic transitions in lead, excluding the θ-Poincaré noncommutative quantum gravity models far above the Planck scale for nonvanishing θ_{μν} electriclike components, and up to 6.

The combined impact of low temperatures and shifting phosphorus availability on the competitive ability of cyanobacteria.

In freshwater systems, cyanobacteria are strong competitors under enhanced temperature and eutrophic conditions. Understanding their adaptive and evolutionary potential to multiple environmental states allows us to accurately predict their response to future conditions. To better understand if the combined impacts of temperature and nutrient limitation could suppress the cyanobacterial blooms, a single strain of Microcystis aeruginosa was inoculated into natural phytoplankton communities with different nutrient conditions: oligotrophic, eutrophic and eutrophic with the addition of bentophos.

GATA4 and GATA6 loss-of-expression is associated with extinction of the classical programme and poor outcome in pancreatic ductal adenocarcinoma.

Objective: GATA6 is a key regulator of the classical phenotype in pancreatic ductal adenocarcinoma (PDAC). Low GATA6 expression associates with poor patient outcome. is the second most expressed GATA factor in the pancreas.

Description of a new species of Laelaspis Berlese (Acari: Mesostigmata: Laelapidae) from Brazil, with a key to the species of the Western Hemisphere.

Laelaspis loeckii Duarte Moreira sp. nov. is described based on the morphology of adult females and males collected from soil in a survey carried out in southern Brazil, in the temperate Pampa biome.

Integrative revision of the Lygodactylus madagascariensis group reveals an unexpected diversity of little brown geckos in Madagascars rainforest.

The Lygodactylus madagascariensis species group, constituting the subgenus Domerguella, currently contains five valid species of inconspicuous dwarf geckos from Madagascars humid forests, but at least 18 deep genetic lineages have been revealed by recent molecular studies. Given the high morphological similarity of these lineages, taxonomic resolution of this astonishing diversity requires efforts to correctly delimit species, as well as assigning the available nomina to the species-level lineages identified. We here combine DNA sequences of one mitochondrial and two nuclear-encoded gene fragments with morphometric measurements and scale counts, and report evidence for a species status of most of the previously identified lineages.

From the Ethiopian Bale Mountains hotspotFilopalpinae subfam. nov., a new taxon of Laniatorean harvestmen based on external and genital morphology (Arachnida, Opiliones, Assamiidae).

Filopalpinae subfam. nov. is proposed as a new subfamily within family Assamiidae based on a new genus, Filopalpus gen.

Discovery of Hishimonus diffractus Dai, Fletcher amp; Zhang, 2013 (Hemiptera: Auchenorrhyncha: Cicadellidae) in Europe, with remarks on previously recorded species of the genus.

During recent surveys on leafhoppers in urban and agroecosystem areas in Europe the Oriental Hishimonus diffractus Dai, Fletcher Zhang, 2013 (Hemiptera, Cicadellidae) has been found. This species, described from China and Thailand, is recorded here for the first time from Europe in the following countries: France, Portugal (Madeira), Spain, Gibraltar, United Kingdom, and Italy (Sicily). H.

The Apechoneura nigricornis species-group, one, two or three species?

Apechoneura nigriventris is removed from synonymy and re-instated as a valid species and included in the nigricornis species-group. Apechoneura seminigra is considered a new synonymy of A. nigriventris.

The genus Syzeton Blackburn, 1891 (Coleoptera, Aderidae) in the United States of America.

The species of Syzeton Blackburn, 1891 (=Zonantes Casey, 1895, syn. nov.) known from the United States are revised.

Systematics of the Central African Spiny Reed Frog Afrixalus laevis (Anura: Hyperoliidae), with the description of two new species from the Albertine Rift.

The geographically widespread species Afrixalus laevis (Anura: Hyperoliidae) currently has a disjunct distribution in western Central Africa (Cameroon, Equatorial Guinea, Gabon, and possibly adjacent countries) and the area in and near the Albertine Rift in eastern Democratic Republic of the Congo and neighboring countries. At least two herpetologists have previously suggested that these disjunct populations represent distinct species, and herein, we utilize an integrative taxonomic approach with molecular and morphological data to reconcile the taxonomy of these spiny reed frogs. We sequenced 1554 base pairs of the 16S and RAG1 genes from 34 samples of A.

Psectrascelis senex sp. nov. (Coleoptera: Tenebrionidae), a new species from the southern Atacama Desert, Chile.

Psectrascelis Solier, 1836 is the most specious South American genus of Nycteliini, which inhabit arid and semiarid regions. Recent expeditions to the southern part of the Atacama Desert collected specimens of Psectrascelis which do not fit with any other described species belonging to this genus. These specimens are morphologically close to P.

From synonym to valid species: Redescriptions of Ampharete acutifrons (Grube, 1860) and A. cirrata Webster amp; Benedict, 1887, and brief descriptions of A. baltica Eliason, 1955 and A. grubei Malmgren, 1865 (Annelida: Terebellida: Ampharetidae).

This paper aims mainly to provide clarity on the morphological characters of the type species of Ampharete, Ampharete acutifrons (Grube, 1860). Its common occurrence and wide distribution are most likely a result of misidentification of different species. Possible reasons for that are the brief original description of this species that is available solely in Latin and a series of questionable synonymizations, resulting in a confusing history of A.

Hitting the Bull's Eye: Stable HeBeOH Complex.

It is now known that the heavier noble gases (Ng=Ar-Rn) show some varying degrees of reactivity with a gradual increase in reactivity along Ar-Rn. However, because of their very small size and very high ionization potential, helium and neon are the hardest targets to crack. Although few neon complexes are isolated at very low temperatures, helium needs very extreme situations like very high pressure.

Be B : A Covalently Bonded Archimedean Beryllo-Borospherene.

A new class of beryllium-boron clusters, beryllo-borospherene, is described herein theoretically. When beryllium is gradually added to the B motif, it undergoes drastic structural modifications. The global minimum of the Be B cluster is an Archimedean beryllo-borospherene in a A electronic ground state, composed of four boron triangles linked at each corner, resulting in a truncated tetrahedron with four B rings capped with four beryllium atoms.

Sources of dehydration fluids underneath the Kamchatka arc.

Fluids mediate the transport of subducted slab material and play a crucial role in the generation of arc magmas. However, the source of subduction-derived fluids remains debated. The Kamchatka arc is an ideal subduction zone to identify the source of fluids because the arc magmas are comparably mafic, their source appears to be essentially free of subducted sediment-derived components, and subducted Hawaii-Emperor Seamount Chain (HESC) is thought to contribute a substantial fluid flux to the Kamchatka magmas.

Multiple motion encoding in phase-contrast MRI: A general theory and application to elastography imaging.

While MRI allows to encode the motion of tissue in the magnetization's phase, it remains yet a challenge to obtain high fidelity motion images due to wraps in the phase for high encoding efficiencies. Therefore, we propose an optimal multiple motion encoding method (OMME) and exemplify it in Magnetic Resonance Elastography (MRE) data. OMME is formulated as a non-convex least-squares problem for the motion using an arbitrary number of phase-contrast measurements with different motion encoding gradients (MEGs).

A new genus and two new species of Galumnidae (Acari, Oribatida) from Nepal.

One new genus and two new species of oribatid mites (Oribatida) of the family Galumnidae are described from soil in Nepal. Anomalogalumna gen. nov.

Slit-band gastropods (Pleurotomariida) from the Upper Triassic St. Cassian Formation and their diversity dynamics in the Triassic.

The St. Cassian Formation, Italy, has yielded the most diverse marine invertebrate fauna known from the Triassic. A quarter of all described Triassic gastropod species has been reported from this formation.

From the lowlands to the highlands of Ecuador, a study of the genus Masteria (Araneae, Mygalomorphae, Dipluridae) with description of seven new species.

Dipluridae represent a small Mygalomorphae family of South American origin, the family includes two subfamilies Diplurinae and Masteriinae although the placement of the latter in Dipluridae is still under debate. The family has a predominantly South American distribution although the genus Masteria L. Koch, 1873 presents an interesting distribution with representatives found in Fiji, Micronesia, New Caledonia, New Guinea and Australia.

Dorothee, a new genus of Cryptinae (Hymenoptera: Ichneumonidae) from Peru.

In this contribution, a new genus (and species) of Ceratocryptina (Hymenoptera: Ichneumonidae, Cryptinae, Cryptini): Dorothee panguanensis n. sp. is described from Peru.

Demography of a Eurasian lynx (Lynx lynx) population within a strictly protected area in Central Europe.

Large carnivores promote crucial ecosystem processes but are increasingly threatened by human persecution and habitat destruction. Successful conservation of this guild requires information on long-term population dynamics obtained through demographic surveys. We used camera traps to monitor Eurasian lynx between 2009 and 2018 in a strictly protected area in the Bohemian Forest Ecosystem, located in the core of the distribution of the Bohemian-Bavarian-Austrian lynx population.