Paleozoic stratigraphy and stucture of the Dry Creek area, Elko and Eureka Counties, Nevada

The purpose of this investigation was to test two hypotheses. The first hypothesis interprets allochthonous rocks in the southern Pinyon Range to lie on the Devonian Nevada Group. The second hypothesis interprets allochthonous rocks to lie on the Mississippian Dale Canyon Formation. Evidence presented here supports the second hypothesis. During Late Silurian to Middle Devonian time, deposition in the southern Pinyon Range occurred in a miogeoclinal shallow shelf environment characterized by the Lone Mountain Dolomite and Nevada Group. Deposition of the Pilot Shale in an incipient basin developed within the shelf, beginning no later,than marginifera-Lower velifer Zone time, marked the onset of the Antler orogeny. A westward-dipping subduction zone formed to the west, developing an accretionary wedge which later became the Roberts Mountains allochthon. Incipient subduction of continental crust resulted in obduction of the allochthon onto the continential crust. The Antler foreland basin formed east of the advancing allochthon where deposition of the Dale Canyon Formation unconformably on the Pilot Shale formed a submarine fan complex consisting of siliciclastic sediments shed from the rising allochthon. The Roberts Mountains allochthon in the southern Pinyon Range consists of the Devonian Woodruff Formation forming the base, the Ordovician Vinini Formation thrust over the Woodruff, with slices of the Devonian Roberts Mountains Formation occurring in between at places. The allochthon was emplaced in the southern Pinyon Range, over the Dale Canyon Formation during or after late isosticha-Upper crenulata Zone time

Contact Tracing by Giant Data Collectors: Opening Pandora's Box of Threats to Privacy, Sovereignty and National Security

Many countries have introduced digital contact tracing apps to fight the COVID-19 pandemic. Such apps help to identify contacts between potentially infectious persons automatically and thus bear the promise of reducing the burden on manual contact tracers and increase tracing accuracy in situations in which people have difficulties identifying with whom they have been in contact. A number of different proposals for digital contact tracing systems have been made or deployed, ranging from heavily centralized to completely decentralized approaches, each with its own advantages and disadvantages in terms of tracing effectiveness and impact on user privacy. During the phase of highly dynamic evolution of these approaches, surprisingly, Google and Apple established an unprecedented friendship and agreed on a very special scheme for contact tracing, realizing this in the form of an API called GAEN that they quickly integrated into their mobile operating systems. A multitude of nationally rolled out tracing apps are now based on the GAEN approach. In this paper, we revisit such apps and the GAEN API on which they are built. In particular, we point out a number of very problematic aspects and threats that the GAEN approach creates through its security and privacy weaknesses but also through the threats that it poses on technological sovereignty and the public health system

Pneumocystis jiroveci Dihydropteroate Synthase Genotypes in Immunocompetent Infants and Immunosuppressed Adults, Amiens, France

To date, investigations of Pneumocystis jiroveci circulation in the human reservoir through the dihydropteroate synthase (DHPS) locus analysis have only been conducted by examining P. jirovecii isolates from immunosuppressed patients with Pneumocystis pneumonia (PCP). Our study identifies P. jirovecii genotypes at this locus in 33 immunocompetent infants colonized with P. jirovecii contemporaneously with a bronchiolitis episode and in 13 adults with PCP; both groups of patients were monitored in Amiens, France. The results have pointed out identical features of P. jirovecii DHPS genotypes in the two groups, suggesting that in these two groups, transmission cycles of P. jirovecii infections are linked. If these two groups represent sentinel populations for P. jirovecii infections, our results suggest that all persons parasitized by P. jirovecii, whatever their risk factor for infection and the form of parasitism they have, act as interwoven circulation networks of P. jirovecii

Optimisation of mould disinfection processes in the dairy industry

Les entreprises laitières peuvent parfois être confrontées à des problèmes d’altération des produits fabriqués dus au développement de moisissures à partir de spores véhiculées par l’air. La maîtrise de ces contaminants passe par des procédures de nettoyage/désinfection faisant appel à des désinfectants. L’objectif de ce projet a été d’évaluer l’activité fongicide de quatre biocides (l’hypochlorite de sodium, l’éthanol, le peroxyde d’hydrogène et la triamine) sur des spores d’Aspergillus flavus, de Cladosporium cladosporioides, de Mucor circinelloides et de plusieurs isolats de Penicillium commune produites en condition de stress hydrique modéré et récoltées à l’état sec. Dans un premier temps, nous avons montré qu’à l’état sec, les espèces les plus résistantes à l’hypochlorite de sodium, éthanol et peroxyde d’hydrogène étaient respectivement A. flavus, P. commune et C. cladosporioides. Dans un second temps, l’activité fongicide de désinfectants industriels contenant ces biocides a été modélisé par un modèle de Weibull en faisant varier la température et la concentration de désinfectant. L’ensemble des cinétiques d’inactivation sont représentées par des courbes convexes. La diminution de la concentration d’un facteur deux n’avait pas d’effet significatif sur les désinfectants à diluer. Cependant les désinfectants à utiliser purs ne doivent pas être dilués. Le temps de contact nécessaire pour inactiver 4log de la population fongique est multiplié d’un facteur de 3 à 20 selon les désinfectants lorsque la température d’application passe de 20 à 8°C. Enfin, aucune adaptation à l’éthanol n’a été observée vis-à-vis d’un stress à l’éthanol sur l’inactivation des spores de deux souches de P. commune.Due to airborne conidia, dairies are often facing mold contamination of their products. These contaminations can be controled by cleaning/disinfection procedures. This project aimed at quantifying the fungicidal efficacy of four biocides (sodium hypochlorite, ethanol, hydrogen peroxide and triamine) on Aspergillus flavus, Cladosporium cladosporioides, Mucor circinelloides and some Penicillium commune isolates produced under a moderate water stress and dry harvested. First, the more resistant species to sodium hypochlorite, ethanol, hydrogen peroxide were A. flavus, P. commune and C. cladosporioides respectively. Second, the fungicidal activity of commercial disinfectants that contained these biocides was modelled by a Weibull model.All inactivation kinetics were represented by upward concave curves. The efficacy of commercial disinfectants “to be diluted” did not differ significantly whether the minimum or the maximum recommended concentration was used. In contrast, commercial disinfectants to be utilized “pure” should not be diluted. The contact time necessary to inactivate 4log of the fungal population was increased from 3 to 20 fold when temperature was decreased from 20 to 8°C. Eventually, no adaptation to ethanol was noticed when exposing two P. commune isolates to ethanol stress

Plate 1.jpg

The purpose of this investigation was to test two hypotheses. The first hypothesis interprets allochthonous rocks in the southern Pinyon Range to lie on the Devonian Nevada Group. The second hypothesis interprets allochthonous rocks to lie on the Mississippian Dale Canyon Formation. Evidence presented here supports the second hypothesis. During Late Silurian to Middle Devonian time, deposition in the southern Pinyon Range occurred in a miogeoclinal shallow shelf environment characterized by the Lone Mountain Dolomite and Nevada Group. Deposition of the Pilot Shale in an incipient basin developed within the shelf, beginning no later,than marginifera-Lower velifer Zone time, marked the onset of the Antler orogeny. A westward-dipping subduction zone formed to the west, developing an accretionary wedge which later became the Roberts Mountains allochthon. Incipient subduction of continental crust resulted in obduction of the allochthon onto the continential crust. The Antler foreland basin formed east of the advancing allochthon where deposition of the Dale Canyon Formation unconformably on the Pilot Shale formed a submarine fan complex consisting of siliciclastic sediments shed from the rising allochthon. The Roberts Mountains allochthon in the southern Pinyon Range consists of the Devonian Woodruff Formation forming the base, the Ordovician Vinini Formation thrust over the Woodruff, with slices of the Devonian Roberts Mountains Formation occurring in between at places. The allochthon was emplaced in the southern Pinyon Range, over the Dale Canyon Formation during or after late isosticha-Upper crenulata Zone time

ViscontiRobertVincent1983.pdf

The purpose of this investigation was to test two hypotheses. The first hypothesis interprets allochthonous rocks in the southern Pinyon Range to lie on the Devonian Nevada Group. The second hypothesis interprets allochthonous rocks to lie on the Mississippian Dale Canyon Formation. Evidence presented here supports the second hypothesis. During Late Silurian to Middle Devonian time, deposition in the southern Pinyon Range occurred in a miogeoclinal shallow shelf environment characterized by the Lone Mountain Dolomite and Nevada Group. Deposition of the Pilot Shale in an incipient basin developed within the shelf, beginning no later,than marginifera-Lower velifer Zone time, marked the onset of the Antler orogeny. A westward-dipping subduction zone formed to the west, developing an accretionary wedge which later became the Roberts Mountains allochthon. Incipient subduction of continental crust resulted in obduction of the allochthon onto the continential crust. The Antler foreland basin formed east of the advancing allochthon where deposition of the Dale Canyon Formation unconformably on the Pilot Shale formed a submarine fan complex consisting of siliciclastic sediments shed from the rising allochthon. The Roberts Mountains allochthon in the southern Pinyon Range consists of the Devonian Woodruff Formation forming the base, the Ordovician Vinini Formation thrust over the Woodruff, with slices of the Devonian Roberts Mountains Formation occurring in between at places. The allochthon was emplaced in the southern Pinyon Range, over the Dale Canyon Formation during or after late isosticha-Upper crenulata Zone time

Plate 2.jpg

The purpose of this investigation was to test two hypotheses. The first hypothesis interprets allochthonous rocks in the southern Pinyon Range to lie on the Devonian Nevada Group. The second hypothesis interprets allochthonous rocks to lie on the Mississippian Dale Canyon Formation. Evidence presented here supports the second hypothesis. During Late Silurian to Middle Devonian time, deposition in the southern Pinyon Range occurred in a miogeoclinal shallow shelf environment characterized by the Lone Mountain Dolomite and Nevada Group. Deposition of the Pilot Shale in an incipient basin developed within the shelf, beginning no later,than marginifera-Lower velifer Zone time, marked the onset of the Antler orogeny. A westward-dipping subduction zone formed to the west, developing an accretionary wedge which later became the Roberts Mountains allochthon. Incipient subduction of continental crust resulted in obduction of the allochthon onto the continential crust. The Antler foreland basin formed east of the advancing allochthon where deposition of the Dale Canyon Formation unconformably on the Pilot Shale formed a submarine fan complex consisting of siliciclastic sediments shed from the rising allochthon. The Roberts Mountains allochthon in the southern Pinyon Range consists of the Devonian Woodruff Formation forming the base, the Ordovician Vinini Formation thrust over the Woodruff, with slices of the Devonian Roberts Mountains Formation occurring in between at places. The allochthon was emplaced in the southern Pinyon Range, over the Dale Canyon Formation during or after late isosticha-Upper crenulata Zone time