bluuebunny/crossref_metadata_2025 huggingface dataset:
La microfaune de foraminiferes des gisements de Salles (Gironde)
Authors: Julius Charles
Published: March 2020

A detailed study of the foraminifera collected from Moulin Debat, Champ de Minoy and the Chateau quarry at Salles (Gironde, France) shows that the microfauna is of Helvetian age. It is characterized by the abundance of Orbulina and by the degree of evolution attained in the ornamentation of the Nonionidae. Study of the sedimentation indicates that the microfauna were deposited in a warm moderately shallow sea which was relatively closed to oceanic influences. Sixty-two species belonging to 36 genera were identified from the localities and are listed in a table with their stratigraphic distribution.
Note sur les Thecideidae (brachiopodes) jurassiques
Authors: Pajaud Daniel
Published: March 2020

Jurassic brachiopod species belonging to the Thecideidae are listed from the western border of the Franco-English basin (Normandy and southern England). Separate lists are given for species confined to the Lias, the Dogger, and the Malm. A new genus, Elliottina, is described which includes E. styliformis n. sp. as the type species. Davidsonella truncata n. sp. and Eudesella? romani n. sp. are also described.
Etude tectonique du secteur Pradoluengo-Alarcia, Sierra de la Demanda (chaines iberiques, Espagne)
Authors: Colchen Michel
Published: March 2020

A tectonic study of the area northwest of Sierra de la Demanda (Spain) revealed Tertiary orogenic phases represented by overlaps and overturnings. Towards the northern border, the Cambrian overrides Carboniferous, Triassic and Jurassic formations; the Carboniferous-Triassic units appear overturned under the Cambrian; and the Jurassic formations are affected locally by a system of dislodged slices of nappes associated with imbricate basement rocks. Two major directions of deformation suggest the presence of two successive orogenic phases. The first phase, older than the Oligocene conglomerates, folded the units above the basement in a NW-SE direction, parallel to the north oriented horst in the basement complex. In the post-Oligocene phase NE-SW imbrication affected the conglomerates as well as the basement and overlying units.
Sur la datation des breches de la montagne Sainte-Victoire pres d'Aix-en-Provence
Authors: Touraine Fernand
Published: March 2020

Breccias in Sainte-Victoire mountain have been considered upper Cretaceous because of their stratigraphic position and the presence of dinosaur eggs. Other nearby breccias are considered Montian (lower Eocene). The supposed upper Cretaceous breccias are displaced from the principal masses by faulting but are the same Montian formation and age.
Sur les couches comprises entre le Wenlockien et le Siegenien dans le Cotentin
Authors: Robardet Michel
Published: March 2020

The beds making up the comprehensive series 'd 1 s 4 ' on the second edition of the Saint Lo sheet of the 1:80,000 geologic map are undifferentiated Silurian-Devonian. Poor outcrops and inadequate paleontologic evidence have prevented correlation of these beds or determination of the Silurian-Devonian contact. In the Saint Sauveur-le-Vicomte area, the beds include fossiliferous strata containing Wenlockian (Silurian) graptolites overlain by beds with fossils transitional between Gedinnian and Siegenian, thus placing the contact in that area. Outcrops of these beds are more extensive than the map shows, hence the map boundaries of the May sandstone 's 2b ' require revision, and the outcrops of kersantite are considerably smaller than indicated.
Monseigneur Gaston Delepine: 1878-1963
Authors: Dubar Gonzague , Le Matre D. , Mouterde R.
Published: March 2020

Monseigneur Gaston Delepine, member of the Institute and Honorary Rector of the Catholic University, was born at Hondschoote in northern France in 1878, and died at Lille in 1963. He was an authority on facies stratigraphy, regional syntheses, paleogeographic interpretations, and on the Carboniferous of Europe and North Africa. His publications are listed.
Les bauxites de la province dinarique (Yougoslavie)
Authors: Grubic Alexandre
Published: March 2020

The Dinaric karst of Yugoslavia has many deposits of red and white bauxites ranging in age from Triassic to Tertiary. Some deposits in Slovenia and Bosnia are of undetermined age. The number of bauxite beds at different stratigraphic horizons in each locality was determined by the number of periods of emergence. The Ljesev stup-Bijele poljane and Budos areas remained emergent a long time, and have thick deposits. Several horizons of bauxite were formed in Dalmatia, Herzegovina, and Vojnik-Prekornica. A brief emergence resulted in single bauxite deposits in Velebit, Lika, Istria, Grmec, and Bespelj.
La structure de l'extremite occidentale de la chaine de l'Etoile au nord de Marseille
Authors: Guieu Gerard
Published: March 2020

The intensely folded and thrust faulted Mesozoic formations of the west end of the Etoile chain were cut by normal faults into four tectonic compartments of diverse structural behavior subsequent to the episode of normal faulting. Details of the resulting complex are described.
Astycoryphe R. et E. Richter 1919 et Unguliproetus Erben 1951 (Proetidae, Trilobites) dans l'Eodevonien superieur du Massif armoricain
Authors: Pillet Jean
Published: March 2020

Two species of Devonian trilobites, Unguliproetus andegavensis n. sp. and Unguliproetus erbrayi n. sp., from the Emsian (uppermost lower Devonian) of the Armorican massif of northwestern France resemble in some respects the Tropidocoryphinae.
L'equilibre chimique dans le metamorphisme
Authors: Fonteilles Michel
Published: March 2020

Local facies exerting a control during metamorphism are discussed in terms of thermodynamic equilibria. Corresponding mineral facies reflect equilibrium states. Four methods for demonstrating the near-attainment of equilibrium are described and discussed.
Nouvelles donnees sur les spilites de la serie de Moglio; nappe du flysch a helminthoides des Alpes maritimes franco-italiennes
Authors: Haccard Daniel
Published: March 2020

Spilites are interbedded in the Moglio series (Cretaceous) at the base of the helminthoid flysch in the Viozene area, Italy. The Moglio contains microgranular quartzite elements and small chlorite balls indicative of an ancient microbreccia or tuff. At their contacts with the sedimentary rocks, the spilites are truncated or take on the microstratification of the sediments. Petrographic study of the spilites shows them to have microlitic structure with plagioclase microlites, small phenocrysts, and calcite globules. The spilites are considered an ancient andesite, almost a diabase. The evidence of rapid crystallization, the structure and the calcite-filled vacuoles suggest submarine extrusion during deposition of the Moglio sediments.
Observations sur les series marno-micacees du synclinal du Reposoir (Haute-Savoie)
Authors: Charollais J. , Rosset Jean
Published: March 2020

The Reposoir syncline (France) lies between the folded strata of the Aravis mountains and the Bargy anticline in the Bornes region. The Annes outlier, in the syncline, is the only remaining evidence of the allochthonous block overthrust on the Aravis. The boundaries between the tectonic units are based on the position of the marly-micaceous series, containing sandy beds with volcanic debris. A comparative petrographic and sedimentologic study of this series in the Aravis and Bargy areas and in the Annes outlier emphasizes the variation in the detrital sediments--silts, sandstone and volcanic graywacke, and conglomerate. Stratigraphic profiles have been constructed from eleven outcrop areas of the marly-micaceous series in the Reposoir syncline. Organic remains in the series are dated as Priabonian (Eocene) and lower Oligocene. The Annes outlier contains lenses of Senonian (upper Cretaceous) sediments.
L'evolution tectonique post-hercynienne de la bordure mesozoique des Cevennes meridionales entre Ales et Ganges
Authors: Seguret Michel , Proust Francois
Published: March 2020

The southeast edge of the Central Massif, between the Rhone and Herault valleys (France), is an area of Mesozoic rocks cut by a NE-SW fault system. Movement along the faults has been recurrent and from the Triassic through the succeeding Mesozoic, uplift and downwarp resulted in local basins and troughs accumulating distinct sedimentary suites. Intense compressive movements associated with the Pyrenean revolution during the late Eocene produced complex folds and overthrusts imposed upon the normal fault system. Continuation of the activity contributed to the complexity of the structures during the Oligocene. No evidence was found, during recent studies, to support the theory of allochthonous movements during the Oligocene.
Presence d'Arenagula kerfornei (Allix), foraminifere 'biarritzien', a la partie terminale du Lutetien superieur de Foulangues (Oise)
Authors: Cavelier Claude , Le Calvez Y.
Published: March 2020

Identification of the foraminifera Arenagula kerfornei, characteristic of the upper Lutetian (Eocene) in the Paris basin, in the Biarritzian shelly sands, located between Tillet and Foulangues, allows the placement of the Biarritzian within the Nummulites varialarius biozone, which corresponds to the uppermost Lutetian and represents the beds just below the basal Auversian.
Donnees nouvelles sur la stratigraphie et les facies du Montien et du Sparnacien inferieur a Paris
Authors: Duronsoy Claude
Published: March 2020

A composite lowermost Tertiary section based on lithologic and paleontologic data from three cores drilled near Paris, France, shows the Montian beginning with a bed which is transgressive on the Campanian chalk. Marked variations in thickness of the Montian beds and the partial disappearance of the upper horizons confirm the existence of a pre-Sparnacian period of erosion. The Meudon conglomerate and the overlying lignitic sands at the base of the Sparnacian are succeeded by a series of sands and shales. The Auteuil sands were deposited in deep gullies cut in shales. The thicknesses of the Montian and Sparnacian facies in the cores are compared in a chart.
Sedimentation microcyclothemique avec croutes zonaires a algues dans le calcaire de Beauce de Chauffour-Etrechy (Seine-et-Oise)
Authors: Freytet Pierre
Published: March 2020

The Chattian Beauce de Chauffour limestone (France), is represented by a series of microcyclothems averaging 30-35 cm in thickness. The rhythmic series includes lacustrine limestone facies--breccias, marls, coquina--and a zoned crust of alternating thin dark and light beds containing algal filaments. This type of sedimentation is the product of a relatively arid region, with intermittent wet and dry periods.
Observations sur les mineralisations de l'arkose' d'Alencon (Orne)
Authors: Lemaitre Helene
Published: March 2020

The upper Aalenian (Jurassic) Alencon arkose of the Orne region, France, contains, in a limited area where the substratum is a two-mica granite, different mineralization zones--silica, barite, pyrite, galena, sphalerite, and fluorite. The Hercynian (Paleozoic) age of the massif excludes the hypothesis of a hydrothermal origin for the mineralized zones. The theory of a sedimentary origin does not explain certain characteristics of the deposit, such as concentration of the mineralization within a limited geographic area and the abundance of silica. Origin is therefore attributed to the activity of thermal spring waters.
Series stratigraphiques et paleogeographie du Cretace superieur dans la region de Lourdes
Authors: Capdecomme Hubert , Deloffre R. , Henry Jacques , Villanova Michel
Published: March 2020

Stratigraphic and paleogeographic data indicate that a zone of the northern Pyrenees was extensively covered by flysch deposits during the upper Cretaceous. The region north of Lourdes has been placed in the Cenomanian-Turonian on the basis of microfauna, and the area to the south is considered Senonian. The two areas were internally folded and although separated by an intermediate cordillera were part of an orogenic unit whose history of subsidence, anticlinal folding, emergence and destruction of cordilleras was associated with the tectonic evolution of the regional geosyncline.
Contribution a la connaissance des cephalopodes cretaces du sud-est de la France; sur deux especes du Cretace inferieur des Basses-Alpes
Authors: Thomel Gerard
Published: March 2020

The lower Cretaceous (Neocomian) ammonite Crioceratites edouardi is redescribed, and a lectotype is designated on the basis of lower Barremian material collected on the slopes of the Cheiron valley, near La Baume.
Le probleme des turbidites; les donnees oceanographiques modernes
Authors: Nesteroff Wladimir D.
Published: March 2020

Data on present-day transport of littoral sediments to abyssal plains of oceanic basins support the conclusion that the theory of deposition by turbidity currents is the only theory that adequately explains the mechanism of deposition of turbidites.
Un element externe de la zone du Pinde; la serie d'Ethia (Crete, Grece)
Authors: Aubouin Jean , Dercourt Jean , Neumann M. , Sigal Jacques
Published: March 2020

The Ethia series of the Pindic facies in Crete (Greece) includes about 30 m of Eocene transitional limestones at the top. The flysch facies overlies these limestones. Thus the Ethia series, in the paleogeography of the Hellenides, is on the outer margin of the Pindus trough, in the zone transitional to the Gavrovo-Tripolitsa ridge.
Sur la limite entre la partie inferieure ('Paleocene') et la partie moyenne ('Eocene') du Paleogene
Authors: Szoets Endre
Published: March 2020

The Paleocene-Eocene boundary is defined on the basis of planktonic foraminifera. The Globorotalia parva zone, the uppermost Paleocene zone, represents the Thanetian, at least in part, or Landenian stage, including the lower part of the Ilerdian stage of Hottinger and Schaub (1960). The G. subbotinae zone, the lowermost Eocene zone, is equivalent to the lower part of the Ypresian, Sparnacian, or Londonian stage, which includes the middle and upper parts of the Ilerdian stage.
Essai de classement d'echantillons de stromatolites des series precambriennes de l'Ahaggar occidental
Authors: Bertrand-Sarfati Janine
Published: March 2020

Specimens of stromatolites from the Precambrian series of the western Ahaggar mountains in the central Sahara of southern Algeria have been classified and studied. 'Conophyton,' bedded reef types, and branching types have been distinguished in the material from different localities. Study of the latter type permits establishment of stratigraphic sections similar to those defined in the Russian Riphean (Precambrian).
Etude des keratophyres de la region de Redon (Paleozoique inferieur du Massif armoricain)
Authors: Boyer Claude
Published: March 2020

At the top of the Cambrian in the Redon region (Armorican massif, France) are indications of acidic volcanism of the quartz keratophyre type, with a low temperature mineral paragenesis. Microlitic and semiglassy flows and a granophyre-filled pipe have been identified. The petrology, mineralogy, and chemistry of the rocks show that the volcanism took place under aerial, continental conditions, contradicting the classical idea that albitophyric extrusions are submarine and of geosynclinal type. The lavas evolved from an early hypersodic phase to a late hyperpotassic extreme, with an intermediate sodi-potassic stage. The flows may have come from a single homogeneous sodi-potassic magma or from several heterogeneous magmas at depth.
Sur une nouvelle espece de coniferale jurassique provenant des 'terres noires' du bassin de la Durance (Dadoxylon alpinum n. sp.)
Authors: Lemoigne Yves
Published: March 2020

The study of the components of a breccia coming from the base of the black earths [middle Jurassic, French Alps] of the Barcillonnette wedge (Hautes-Alpes) has enabled the observation of fragments of carbonized wood whose characteristics have led to the description of a new conifer of mixed gymnosperm structure and whose Jurassic age has been determinable.
Le Jurassique et le Neocomien du mont Sacon (Pyrenees centrales)
Authors: Delfaud Jean
Published: March 2020

In the Mont Sacon series (central French Pyrenees) the stratigraphic succession from the Jurassic to the Neocomian (lower Cretaceous) can be observed. Four groups are distinguished: the Liassic, the middle and upper Jurassic, the terminal Jurassic, and the Neocomian. By means of the microfauna, these strata are correlated with sequences in the Pyrenees and the Aquitaine basin. Several important sedimentary breaks--in the lower Bathonian, Oxfordian, Sequanian, and the base of the upper Portlandian (Jurassic), and the basal Valanginian and upper Neocomian (Cretaceous)--are evidence of changes in sedimentary environment at least partly due to movements of the basement.
Les rongeurs du Vallesien (Miocene superieur) de Can Llobateres (Sabadell, Espagne); Gliridae et Eomyidae
Authors: Hartenberger Jean Louis
Published: March 2020

After the study of the Cricetidae, the most abundant group, representatives of two other families are described: Muscardinus (Muscardinus) crusafonti n. sp., Muscardinus (Eomuscardinus) vallesiensis n. subgen. n. sp., Glirulus sp., Pentaglis sp., for the Gliridae; Eomys catalaunicus n. sp. and Pseudotheridomys (Keramidomys) pertesunatoi n. subgen. n. sp. for the Eomyidae. The systematics of these forms are considered.
Comportement de certains brachiopodes collolophides d'apres l'etude de leur kinesome
Authors: Termier Henri , Termier Genevieve
Published: March 2020

The behavior of certain collolophid brachiopods (Productacea, Strophalosiacea) is interpreted from the study of their kinesome (adductor and diductor muscle scars). Their functional correlations and ecology are deduced.
Sur les mammiferes oligocenes du Caucase
Authors: Gabounia L.
Published: March 2020

Remains of land mammals from Oligocene lignite beds of the Caucasus, USSR, are described. Two principal ecologic groups are distinguished; one is composed of inhabitants of humid swamp and forest regions, the other of inhabitants of semiarid savannas.
Les bryozoaires du Neocomien de Mieges (Jura)
Authors: Walter Bernard
Published: March 2020

A systematic study of lower Cretaceous bryozoans from Mieges (Jura, France) is presented and comparison is made with other faunas of the same age. The bryozoans are well preserved, indicating that fossilization occurred in place. They were epiphytic and lived on herbaceous vegetation.
Un suide fossile nouveau du Miocene superieur de l'Afrique du nord
Authors: Arambourg Camille
Published: March 2020

Propotamochoerus devauxi n. sp., systematic description, Algeria
Considerations paleogeographiques a propos d'une association de microplanctontes de la serie gothlandienne de Birmingham (Alabama, U.S.A.)
Authors: Cramer Fritz H.
Published: March 2020

A well-preserved assemblage of acritarchs (about 29 species, 3 new, listed here but described in another paper, Cramer 1968), plant spores, and chitinozoans, from the Lower Silurian Red Mountain Formation south of Birmingham, characterized by Veryhachium? carminae, contains many acritarchs in common with the Neagha and MaplewoodFormations, New York; these are remarkably different from Silurian assemblages in Ohio, Indiana, Illinois, and the Rochester Formation in New York and Ontario, all characterized by Deunffia furcata. Cramer plots the regional distribution of these assemblages and correlatives in Europe and Africa, and shows them to be roughly parallel to Silurian magnetic paleolatitudes (with the continents in different relative position), and to constitute 'palynological' provinces related to paleoclimatic zonation.
Sur la presence de roches vertes interstratifiees dans la Sierra de Lujar (cordilleres betiques internes, Espagne); etude petrographique et chimique
Authors: Dimpault-Darcy Patrick , Juteau Thierry , Leroy Henri
Published: March 2020

Mineralogic-chemical data, volcanic origin, two facies (diabase, tuff), Triassic
Le district minier de Linares-La Carolina et son cadre metallogenique en Sierra Morena orientale (Espagne)
Authors: Tamain Guy
Published: March 2020

Hydrothermal mineralization, Pb-Sn-W-Sb zonation, Hercynian (late Paleozoic)
Contribution a la connaissance des thecidees (brachiopodes) du Cretace d'Europe
Authors: Smirnova Tatiana N. , Pajaud Daniel
Published: March 2020

Systematic descriptions, Rioultina parvula n. sp., ontogeny, phylogeny, Valanginian and Hauterivian, Crimea (European USSR)
Etude geodynamique de la pente continentale au large de Cannes et Antibes
Authors: Pautot Guy
Published: March 2020

Jurassic basement, Pliocene-Quaternary sedimentary cover, canyons cut into sedimentary cover, French Mediterranean
Donnees geophysiques sur le prolongement du socle cristallin du Morvan sous ses bordures sedimentaires
Authors: Weber Christian
Published: March 2020

Paleozoic basement, lithostratigraphic units, morphology, tectonics, surveys, France
La transgression des formations secondaires sur la bordure orientale du Morvan dans la region de Pouilly-en-Auxois et de Saulieu
Authors: Lorenz Jacqueline Francoise
Published: March 2020

Progressive westward extension of transgressions from Keuper (Triassic) to Sinemurian (Jurassic), France
Sur l'existence d'un cycle biostratigraphique dans le Bathonien au sud-ouest du Massif ardennais (note preliminaire)
Authors: Fischer Jean Claude
Published: March 2020

Bathonian-lower Callovian, five biostratigraphic phases (oolitic, chalky-marly, pseudopisolitic), interaction of rates of subsidence and sedimentation and hydrodynamics, Jurassic, France
Observations sur l'ecologie des brachiopodes dans le complexe recifal de la vallee de l'Yonne
Authors: Delance Jean Henri , Menot Jean Claude
Published: March 2020

Microsolenid colonies built up on terebratulid biocenosis at Chatel-Censoir, adaptation of brachiopod populations to forereef environment at Druyes, middle-upper Oxfordian (Jurassic), France
Rapports entre la tectonique de socle et la tectonique de couverture sur la bordure ouest des Maures
Authors: Bathiard Michel , Lambert Claude
Published: March 2020

Thrust fault, metamorphic basement thrust over Permian sediments, contorted middle-upper Triassic beds, overthrusts-truncations-thin outs in Liassic and lower Dogger (Jurassic), block faulting in middle-upper Jurassic, deformation due to northward thrusting in basement, facies variations, France
Le probleme des domes de la Mediterranee occidentale; etude geophysique d'une colline abyssale, la structure A
Authors: Leenhardt Olivier
Published: March 2020

Salt domes (rather than volcanic material), bathymetric-seismic-magnetic survey
Decouverte de micro-organismes dans des stromatolites de la serie pourpree (Tanezrouft oriental)
Authors: Bertrand Jeanine
Published: March 2020

Algal-like organisms, Cambrian, comparison with Precambrian stromatolites, Algeria
Restes vegetaux mis en evidence dans les calcaires lacustres tertiaires d'Aquitaine
Authors: Caudwell Christiane
Published: March 2020

Cyanophyceans, chlorophyceans, mushrooms, higher plants, decalcification phenomena, France
A propos de l'Ammonoceratites (Argonauticeras) depereti (Kilian) du Gargasien des Basses-Alpes orientales
Authors: Thomel Gérard
Published: March 2020

Sommaire

Description d'une petite série d'échantillons se rapportant à une rare espèce des marnes aptiennes des Basses-Alpes : Argonauticeras depereti (KILIAN).
دراسة تحليلية عن كتاب تعليم اللغة العربية لطلاب الصفّ السادس بمدرسة المعلمين والمعلمات تمباكبراس جومبانج ألفه محمد إلياس
Authors: Affandi Masykur , Shiddiq Jamaluddin
Published: March 2020

Studi ini bertujuan untuk mengetahui 1) bagaimana model penyajian materi dari buku “Ta’lim al-Lughah al-’Arabiyyah” karya M. Ilyas, dan 2) bagaiman model repetisi dalam buku tersebut. Penelitian ini menggunakan pendekatan kualitatif dengan jenis library research dan content anaylsis. Hasil dari penelitian ini adalah (1) bahwa penyajian materi dalam buku "Ta’lim al-Lughah al-’Arabiyyah" kepada siswa kelas enam di sekolah Muta’allimiin Tambakberas Jombang ditulis oleh Mohamed Ilyas dilihat sangat baik dengan adanya pengantar penerbit, penulis buku, daftar isi, dan semua aspek yang harus ada menurut Maki dalam penyajian Materi. Bahkan ada beberapa aspek penyajian artikel yang belum terpenuhi, seperti panduan, daftar pustaka, dan daftar istilah. (2) Di bidang review, aspek dalam ini bisa dianggap baik. bahkan, namun ada beberapa yang harus dievaluasi ulang di mana itu belum ada, seperti riwayat penulis, moto, nyanyian, dan sebagainya. Maka, alangkah Lebih baiknya bila ditambah dengan  variasi latihan dan pelajaran tambahan
Reservoir-Simulation Model with Surfactant Flooding Including Salinity and Thermal Effect, Using Laboratory Experiments
Authors: Preux Christophe , Malinouskaya Iryna , Nguyen Quang-Long , Flauraud Eric , Ayache Simon
Published: March 2020

Surfactant injection is a process used by oil companies to improve the oil-recovery factor. Surfactant modifies the interfacial tension (IFT) and to a lesser extent the mobility-reduction factor. Both the salinity and the temperature will affect the efficiency of the surfactant. As a result, a series of laboratory experiments are commonly conducted to evaluate dependency. However, these experiments are expensive and time consuming. In this paper, we present numerical simulations coupled to a model that allows taking into account the modification of the IFT and the mobility-reduction factor caused by both the salinity and temperature variations during surfactant injection.

In this work, we propose a coupled numerical model using five equations: two transport equations of water and oil phases modelized by Darcy's law, two transport equations for the surfactant and the salinity (the surfactant and the salinity are transported only in the water phase), and one energy-conservation equation to take into account the thermal effect on surfactant flooding. The system of equations includes the salinity and temperature effects on the surfactant adsorption and thermal degradation, as well as the IFT. Thus, this model allows improving the analysis of thermal corefloods or reservoir operations resulting from the surfactant injection.

On the basis of corefloods, we use the coupled model to reproduce laboratory experiments. We analyze the interaction phenomena between the surfactant, salinity, and temperature. Then, we demonstrate a competition between two phenomena: the thermal effect on the viscosity of water and the effect of surfactant on the mobility of water. This study highlights the efficiency of numerical simulations for the analysis and choice of the surfactant applied to the given reservoir and well conditions.
Evaluation and Plugging Performance of Carbon Dioxide-Resistant Particle Gels for Conformance Control
Authors: Sun Xindi , Long Yifu , Bai Baojun , Wei Mingzhen , Suresh Sujay
Published: March 2020

Traditional polyacrylamide (PAM)-based superabsorbent polymer has been applied to control excess carbon dioxide (CO2) production in CO2-flooding fields. Nevertheless, the application results are mixed because the polyacrylamide-based superabsorbent polymer dehydrates significantly when exposed to supercritical CO2; therefore, we evaluated a novel CO2-resistant gel (CRG) with reliable stability and CO2-responsive properties. Particularly, the CRG swelling ratio (SR) and gel-volume increase after CO2 stimulation if additional water is available. Swollen CRG was placed in high-pressure vessels to examine the weight loss and the property changes before and after exposure to CO2. The breakthrough pressure and CRG-plugging efficiency to CO2 were measured using partially open fractured-sandstone cores. Two water/alternating/gas (WAG) cycles were conducted to test the CRG-plugging performance after CRG injection. The high-pressure vessel-test results show that the CRG is very stable under the supercritical-CO2 condition and no free water is released from the samples. The scanning-electron-microscope (SEM) images confirm that no structural damage was observed in CRG after exposure to CO2. The breakthrough pressure increases with the matrix permeability, which is mainly induced by the internal and external gel cake formed on the rock surface. CRG can reduce the water permeability more than CO2 permeability. CRG-plugging efficiency to CO2 decreases with the increase of WAG cycles. However, in the 0.5-mm fracture model and the 390-md model, CRG-plugging efficiency to water increases with WAG cycles. This phenomenon further indicates that CRG can be stimulated by CO2, which allows CRG to absorb additional water during post-waterflooding. In general, this study reports the concept of the novel CRG and a systematical evaluation of CRG stability under supercritical-CO2 conditions and CRG-plugging efficiency using a partially open fractured-sandstone model.
Community perceptions about dementia in southwestern Uganda
Authors: Owokuhaisa Judith , Rukundo Godfrey Zari , Wakida Edith , Obua Celestino , Buss Stephanie S.
Published: March 2020

Background

With the increasing number of people surviving into older age in Africa, dementia is becoming a public health concern. Understanding the social dynamics of dementia in resource-limited settings is critical for developing effective interventions. We explored community perceptions about people with dementia in southwestern Uganda.

Methods

Fifty-nine individuals (aged 19-85 years, 56% female) participated in seven focus group discussions. In addition, 22 individual in-depth interviews were conducted among individuals (aged 22-84 years, 36% female). Both interviews and focus group discussions were audio recorded, transcribed verbatim, and evaluated using a quantitative content analysis approach.

Results

Five themes were generated during content analysis: i) Labeling of the illness, ii) Presentation of the person with dementia, iii) Causation, iv) Impact of the disease on people with dementia and their caregivers and v) Views on how to address unmet needs in dementia care. Dementia was commonly referred to as “ okuhuga ” or “okwebwayebwa” (also, oruhuzyo/ empugye / akahuriko) which translates as “mental disorientation”. The participants reported that most people with dementia presented with forgetfulness, defecating and urinating on themselves, wandering away from home, going out naked, and picking up garbage. Some participants perceived memory problems as a normal part of the aging process, while others attributed the cause of dementia to syphilis, cancer, allergy, old age, satanic powers, witchcraft, poor nutrition, or life stress. Participants reported multiple sources of stress for caregivers of people with dementia, including financial, social, and emotional burdens. Finally, participants suggested that community and governmental organizations should be involved in meeting the needs of people with dementia and their caregivers.

Conclusions

Community members in southwestern Uganda largely identified dementia as a problem that comes with older age, and can identify key features of dementia presentation. Participants identified significant stressors affecting people with dementia and their caregivers, and reported that families and caregivers would benefit from education on the management of symptoms of dementia, and assistance in overcoming associated financial, social, and emotional burdens related to caretaking.
Efficacy of acupuncture in improving the symptoms and the quality of life of patients with moderate or severe acne vulgaris: a protocol for a randomized controlled trial
Authors: Jiao Ruimin , Huang Man , Zhang Weina , Liu Zhishun
Published: March 2020

Background : Acne vulgaris (AV) is a common chronic dermatologic disease that tends to impair the appearance and the quality of life (QoL) of patients. Although several trials have indicated the effectiveness of acupuncture for treatment of patients with AV, the results of these trials have been contested owing to potential bias in their design. Thus, there is a lack of robust data to evaluate the efficacy of acupuncture in patients with AV. In addition, none of the previous clinical trials of acupuncture therapy for AV used QoL as a primary outcome or employed a sham acupuncture control arm. The aim of the study is to evaluate the effect of acupuncture on the symptoms and the QoL of patients with moderate or severe AV. Methods/design: One hundred eligible participants with AV will be randomly assigned to acupuncture or sham acupuncture groups (1:1 allocation). All participants will receive 4-week treatment comprising of a total of 12 sessions (3 sessions per week). The primary outcome will be change from baseline in the Skindex-16 scale total score at treatment completion. The secondary outcomes will be: Skindex-16 subscale score; the Dermatology Life Quality Index scale total score; the total lesion count and inflammatory lesion count; visual analogue scale scores for assessment of itch and pain; patient expectations of acupuncture; and the blinding of the effect of sham acupuncture. Follow-up evaluation will be performed at weeks 16 and 28. All outcome analyses will be performed in the intention-to-treat population. Discussion: We expect to evaluate the effectiveness of acupuncture in ameliorating the symptoms and improving the QoL of patients with moderate or severe AV compared with sham acupuncture with more robust evidence. The limitations of the trial design are its single center scope, relatively small sample size, and lack of blinding of the acupuncturists. Trial Registration: Chinese Clinical Trial Registry, ChiCTR-1900023649 (Date of registration: Jan 2, 2019). Keywords: acupuncture, acne vulgaris, quality of life, randomized-controlled trial, protocol.
Stable intronic sequence RNAs (sisRNAs) are selected regions in introns with distinct properties
Authors: Jin Jing , He Ximiao , Silva Elena M
Published: March 2020

Background: Stable introns and intronic fragments make up the largest population of RNA in the oocyte nucleus of the frog Xenopus tropicalis . These stable intronic sequence RNAs (sisRNAs) persist through the onset of zygotic transcription when synchronous cell division has ended and the developing embryo consists of approximately 8000 cells. Despite their abundance, the sequence properties and biological function of sisRNAs are just beginning to be understood.
Results: To characterize this population of noncoding RNA, we identified all of the sisRNAs in the X. tropicalis oocyte nucleus using published high-throughput RNA sequencing data. Our analysis revealed that sisRNAs, have an average length of ~360 bps, are widely expressed from genes with multiple introns, and are derived from specific regions of introns that are GC and TG rich, while CpG poor. They are enriched in introns at both ends of transcripts but preferentially at the 3’ end. The consensus binding sites of specific transcription factors such as Stat3 are enriched in sisRNAs, suggesting an association between sisRNAs and transcription factors involved in early development. Evolutionary conservation analysis of sisRNA sequences in seven vertebrate genomes indicates that sisRNAs are as conserved as other parts of introns, but much less conserved than exons.
Conclusion: In total, our results indicate sisRNAs are selected intron regions with distinct properties, and may play a role in gene expression regulation .
Cardiopulmonary resuscitation training for schoolchildren and its effects on their prosocial behavior and knowledge: Mixed methods research design.
Authors: Pivač Sanela , Gradišek Primož , Skela-Savič Brigita
Published: March 2020

Background: The benefits of cardiopulmonary resuscitation training for schoolchildren are well known, but the appropriate age for introducing training is still being discussed. This is a very important issue, since out-of-hospital cardiac arrest is a major public health concern. The objective of this study is to investigate the effects of implemented cardiopulmonary resuscitation training on the knowledge and prosocial behavior of children in the last three grades of Slovenian elementary schools, and to identify the experience of training instructors.
Methods: A mixed methods research design was employed, using a cohort study with testing before and after training, and focus groups. Research was conducted in 15 Slovenian public elementary schools offering cardiopulmonary resuscitation training. Focus groups included training instructors and developers. Data was collected with a structured questionnaire from April to June 2018 and analyzed using univariate and bivariate analyses. The three focus groups were convened in September and October 2018. Content analysis of the discussion transcriptions was conducted. The sample included 764 schoolchildren aged 12.5–14.5 years before cardiopulmonary resuscitation training and 566 schoolchildren after training. Three non-homogeneous focus groups included eight cardiopulmonary resuscitation instructors.
Results: Significant progress in knowledge was noted after training implementation, with the greatest progress seen in the youngest age group (mean age 12.5). The greatest increase after the training was seen in confidence (p=0.001), increase in helping behavior was moderate (p=0.003), while the level of internal motivation prior to and after the training remained the same. Analysis of the focus groups yielded two themes: (a) the effects of cardiopulmonary resuscitation training on schoolchildren, and (b) the systemic responsibility of the school system and professional bodies.
Conclusions: Significant progress in schoolchildren’s cardiopulmonary resuscitation knowledge after training was established. Early introduction of training is recommended. Cardiopulmonary resuscitation knowledge influences the development of schoolchildren’s prosocial behavior, as it raises awareness of the responsibility to help others and increases self-confidence to provide bystander cardiopulmonary resuscitation. We can conclude that early cardiopulmonary resuscitation training for children is crucial. It should be a mandatory part of school curricula in those countries where cardiopulmonary resuscitation is not yet mandatory.
Melatonin attenuates vascular calcification by activating mitochondrial fusion and mitophagy via an AMPK/OPA1 signaling pathway
Authors: chen chenweiren , yang jia qi , liu fang , shen xue qin , sha yuan
Published: March 2020

The authors have withdrawn this preprint from Research Square.
Sexual and Gender Minority Health Curricula in Health Care Professional Schools
Authors: Pratt-Chapman Mandi L.
Published: March 2020

Background: Lesbian, gay, bisexual, transgender, queer, and intersex people—inclusively termed “sexual and gender minorities”—have unique health and health care needs that are not being met by most healthcare providers due to lack of training in health care professional schools. The purpose of this qualitative study was to examine implementation factors for advancing sexual and gender minority health professional student curricula in academic settings. Methods: Semi-structured interviews guided by the Consolidated Framework for Implementation Research (CFIR) were conducted with sixteen curricular champions to identify factors relevant to curricular adoption, integration, and sustainment. Themes were coded using a hybrid of deductive and inductive approaches and reported using major CFIR domains. Results: Facilitators supporting implementation of sexual and gender minority health curricula included collaboration among multiple stakeholders, alignment of formal and hidden curricula, fostering an organizational culture that valued inclusion and diversity, engagement with external subject matter experts or faculty with content expertise, and thoughtful and inclusive planning. Conclusion: This study contributes to health care professional education research as well as to implementation science. Facilitators that were identified in this study can be used to increase the adoption, integration, and sustainment of sexual and gender minority health curricula in diverse academic settings.
Health care use and treatment-seeking for depression symptoms in rural India: An exploratory cross-sectional analysis
Authors: Roberts Tessa Naomi , Shidhaye Rahul , Patel Vikram , Rathod Sujit D
Published: March 2020

Background
There is a large “treatment gap” for depression worldwide. This study aimed to better understand the treatment gap in rural India by describing health care use and treatment-seeking for depression.
Methods
Data were analysed from a two round cross-sectional community survey conducted in rural Madhya Pradesh between May 2013 and December 2016. We examined the proportion of individuals who screened positive for depression (≥10) on the Patient Health Questionnaire (PHQ-9) who sought treatment in different sectors, for depression symptoms and for any reason, and compared the latter with health service use by screen-negative individuals. We analysed the frequency with which barriers to healthcare utilisation were reported by screen-positive adults. We also analysed the association between seeking treatment for depression and various predisposing, enabling and need factors using univariable regression.
Results
86% of screen-positive adults reported seeking no depression treatment. However, 66% had used health services for any reason in the past 3 months, compared to 46% of screen-negative individuals (p<0.0001). Private providers were most frequently consulted by screen-positive adults (32%), while only 19% consulted traditional providers. Structural barriers to healthcare use such as cost and distance to services were frequently reported (54% and 52%, respectively) but were not associated with treatment-seeking for depression. The following factors were found to be positively associated with treatment-seeking for depression: higher symptom severity; lack of energy, lack of interest/pleasure, low self-esteem, or slow movements/restlessness on more than 7 days in the past 2 weeks; being married; having discussed depression symptoms; and reporting problems with medication availability and supply as a barrier to healthcare. No evidence was found for an association between treatment-seeking for depression and most socio-economic, demographic or attitudinal factors.
Conclusions
These findings suggest that the majority of adults who screen positive for depression seek healthcare, although not primarily for depression symptoms, indicating the need to improve detection of depression during consultations about other complaints. Private providers may need to be considered in programmes to improve depression treatment in this setting. Further research should test the hypotheses generated in this descriptive study, such as the potential role of marriage in facilitating treatment-seeking.
Developing senior hospital managers: does ‘one size fit all’? – evidence from the evolving Chinese Health System
Authors: Liang Zhanming , Howard Peter F , Wang Jian , Xu Min , Zhao Mei
Published: March 2020

Background: To improve the effectiveness and efficiency of health service provision in China, the National Health Commission has emphasised that training of all health service managers is essential. However, the implementation of that policy has proven challenging for various reasons, one of which is the lack of understanding of the competency requirements and gaps. The aims of the study were to develop an understanding of the characteristics and training experience of hospital managers in one major Chinese city, explore the difficulties they experience and relate them to their perceived importance of management competencies and the perceived level of their management competency.
Methods: A cross-sectional, descriptive study with a three-component survey including the use of a validated management competency assessment tool was conducted with three senior executive groups (n=498) from three categories of hospital in Jinan, Shandong Province, China.
Results: The survey confirmed that formal and informal management training amongst participants before commencing their management positions was inadequate. The core competencies identified in the Australia context were applicable to the management roles in Chinese hospitals. In addition. the senior executives had low levels of confidence in their management competence. Furthermore, the data showed significant differences between hospital categories and management levels in terms of their commitment to formal and informal training and self-perceived management competence.
Conclusions: The study suggests that management training and support should be provided using a systematic approach with specific consideration to hospital types and management levels and positions. Such an approach should include clear competency requirements to guide management position recruitment and performance management.
Microbial mats in the Turks and Caicos Islands reveal diversity and evolution of phototrophy in the Chloroflexota order Aggregatilineales
Authors: Ward Lewis M , Lingappa Usha F , Grotzinger John P , Fischer Woodward W
Published: March 2020

Genome-resolved metagenomic sequencing approaches have led to a substantial increase in the recognized diversity of microorganisms; this included the discovery of novel metabolic pathways in previously recognized clades, and has enabled a more accurate determination of the extant distribution of key metabolisms and how they evolved over Earth history. Here, we present metagenome-assembled genomes of members of the Chloroflexota (formerly Chloroflexi or Green Nonsulfur Bacteria) order Aggregatilineales (formerly SBR1031 or Thermofonsia) discovered from sequencing of thick and expansive microbial mats present in an intertidal lagoon on Little Ambergris Cay in the Turks and Caicos Islands. These taxa included multiple new lineages of Type 2 reaction center-containing phototrophs that were not closely related to previously described phototrophic Chloroflexota—revealing a rich and intricate history of horizontal gene transfer and the evolution of phototrophy and other core metabolic pathways within this widespread phylum.
The effect of simulation-based training in non-physician anesthetists in Tigray region, Ethiopia
Authors: Etanaa Naod Bulti , Benwu Kore Menjie , Gebremedhin Hagos Gebregzabiher , Desta Haftom Berhane
Published: March 2020

Objective : In Ethiopia simulation-based anesthesia education is a new way of teaching method which started in Mekelle University as of January, 2019. Hence, the purpose of this study is to evaluate whether simulation-based training improves non-physician anesthetists’ knowledge and attitude on maternal and neonatal anesthesia cares or not.
Results : Out of 50 study subjects, 66% had a working experience of less than 5 years.. Knowledge score improved significantly from 49.78% and 66.22% in pretest and posttest results respectively. The posttest result was significantly improved (P< 0.001) for all knowledge questions. The respondents were asked about a negative statement and a positive statement about the need to have effective closed lope communication, maternal resuscitation and neonatal resuscitation. The attitude score improved from 72.45% to 79.11% in pretest and posttest respectively. From the 9 questions the attitudinal mean score for pretest was 6.52 and posttest 7.12. The null hypothesis of equal knowledge and attitude was rejected, t (49) = -5.54, p < 0.001 and t (49) = -2.25, p < 0.03 respectively.