bluuebunny/crossref_metadata_2025 huggingface dataset:
Análisis de la tendencia a la liquidez del agregado monetario M3 en la eurozona: 1997-2018
Authors: Pateiro-Rodríguez Carlos , Freire-Seoane María Jesús , López-Bermúdez Beatriz , Pateiro-López Carlos
Published: March 2020

Durante las dos últimas décadas, el agregado monetario M3, de referencia del Banco Central Europeo (BCE), ha experimentado una fuerte tendencia hacia su acumulación en los componentes más líquidos: efectivo en circulación y depósitos a la vista, en detrimento de las modalidades de depósitos a plazo y otros componentes de menor ponderación. Si bien este comportamiento es compatible con una larga etapa de bajas tasas de interés, resulta interesante la búsqueda de otras explicaciones, complementarias y/o alternativas, a la fuerte concentración de la demanda de dinero en los activos más líquidos. Esta deriva del agregado de referencia puede tener consecuencias sobre la estabilidad de precios, objetivo último del BCE, al mismo tiempo que puede constituirse en un elemento potencial de la modificación del comportamiento del ahorro. En este trabajo, junto con el análisis de la evolución de los siete componentes del M3 1997-2018, presentamos los resultados de un trabajo empírico sobre la estabilidad de la relación entre la demanda de dinero y las variables macroeconómicas determinantes. Los resultados muestran que las fuertes perturbaciones e incertidumbres financieras a raíz de la crisis, así como las decisiones de política monetaria no convencional (quantitative easing) adoptadas por el BCE poseen alguna capacidad explicativa del fenómeno estudiado.
A dimeric stilbene extract produced by oxidative coupling of resveratrol active against Plasmopara viticola and Botrytis cinerea for vine treatments
Authors: El Khawand Toni , Gabaston Julien , Taillis David , Iglesias Marie-Laure , Pedrot Eric , Palos Pinto Antonio , Valls Fonayet Josep , Merillon Jean Michel , Decendit Alain , Cluzet Stephanie , Richard Tristan
Published: March 2020

Aim: Stilbenes are a group of polyphenols that contribute to the defense mechanisms of grapevine under stress conditions. The main active compounds are oligomeric stilbenes. The sourcing of such compounds is limited by plant raw material availability. In order to overcome this limitation, we proceeded to hemisynthesis of oligomeric stilbenes from natural resveratrol by oxidative coupling using metals. The reaction mixture and the obtained pure compounds were tested for their antimicrobial activity in vitro against P. viticola and B. cinerea, and compared with that of resveratrol and grapevine cane extract.Methods and results: Hemisynthesis was achieved in methanol using silver acetate (AgOAc) as oxidative coupling reagent. Four main compounds were obtained in the reaction mixture: δ-viniferin, parthenostilbenin B, oxistilbenins A and B. Results demonstrate the ability of oxidative coupling reaction to produce potent inhibitors of P. viticola and B. cinerea. The reaction mixture is enriched in antimicrobial compounds with high potency as it is at least eight times more active than grapevine cane extract against P. viticola. In addition, this reaction mixture reveals a high fungitoxicity against B. cinerea in contrast to the grapevine extract.Conclusion: The present findings indicate that metals could be used for producing highly antimicrobial compounds from natural resveratrol.Significance and impact of the study: In this study, a method to produce active dimeric stilbenes to protect grapevine was developed based on botanical ingredients. The combination of natural extracts, rich in resveratrol, and metals such as copper may be used as alternatives to Bordeaux mixture and chemical fungicides to protect crops.
The Wuhan Pneumonia Outbreak: High Isoleucine and High Valine Plus Glycine Contents Are Features of the Proteins of COVID-19 Virus
Authors: Wan Yulin , Yan Sirui , Zhang Ying , An Shanshan , Yang Kaiqiao , Xu Huan , Gan Tao , Cao Weiguo , Liu Qiuyun
Published: March 2020

The current pneumonia epidemic in China could evolve into a pandemic on a global scale if not effectively contained. The SARS-CoV-2 possesses a 61-amino acid open reading frame resembling SARS-CoV virulence factor - ORF6 peptide. The isoleucine content is 15.9% in ORF6 of SARS-CoV versus 16.4% of that in SARS-CoV-2. Given the proton affinity in the carbonyl oxygen in isoleucine, augmented proton traffic can enhance proton-ion antiport and prompt cell swelling. Calorie restriction has been confirmed in animal studies to extend lifespan, and its underlying mechanism is not fully known. As the content of essential amino acids in the open reading frame of SARS-CoV-2 reaches 57.4%, a starch/vitamin diet served for short period of time does not give rise to essential amino acids and halts virion production, which could be adopted as prophylactic approach of many viral infections. Plant-based diet or fasting/boiled rice water can also minimize the intake of essential amino acids or all amino acids respectively. Furthermore, several proteins of SARS-CoV-2 possess high valine plus glycine content which is implicated in heart disease, justifying the aforementioned approaches.
A G(enomic)P(ositioning)S(ystem) for Plant RNAPII Transcription
Authors: Marquardt Sebastian , Leng Xueyuan , Thomas Quentin , Rasmussen Simon
Published: March 2020

Post-translational modifications (PTMs) of histone residues shape the landscape of gene expression by modulating the dynamic process of RNAPII transcription. The contribution of particular histone modifications to the definition of distinct RNAPII transcription stages remains poorly characterized in plants. Chromatin Immuno-precipitation combined with next-generation sequencing (ChIP-seq) resolves the genomic distribution of histone modifications. Here, we review histone PTM ChIP-seq data in Arabidopsis thaliana and find support for a Genomic Positioning System (GPS) that guides RNAPII transcription. We review the roles of histone PTM “readers”, “writers” and “erasers”, with a focus on the regulation of gene expression and biological functions in plants. The distinct functions of RNAPII transcription during the plant transcription cycle may in part rely on the characteristic histone PTMs profiles that distinguish transcription stages.
DNA Methylation Analysis of the COVID-19 Host Cell Receptor, Angiotensin I Converting Enzyme 2 Gene (ACE2) in the Respiratory System Reveal Age and Gender Differences
Authors: Corley Michael J. , Ndhlovu Lishomwa C.
Published: March 2020

Background: Coronavirus disease 2019 (COVID-19) has emerged as a global threat to human health and disease risk increases with advancing age. The regulation of the ACE2 gene that codes for COVID-19 host receptor ACE2 has been shown to be under epigenetic regulation. Here, we examined whether intensive DNA methylation profiling of the ACE2 gene differed by human host tissue and cell type, gender, and age. Results: Accessing four public datasets, we observed unique human cell-type-specific ACE2 DNA methylation patterns. In human lung tissues, gender differences in DNA methylation at 2 sites related to the ACE2 gene were identified. Further, in freshly isolated airway epithelial cells, DNA methylation near the transcription start site of the ACE2 gene associated with biological age. Conclusion: Epigenetic profiling of host tissue may permit discovery of age and gender-related potential risk factors for COVID-19. How perturbations in ACE2 methylation relate to clinical severity across the ages and gender needs to be determined to guide screening tools and potential epigenetic modification targeting to alleviate COVID-19 morbidity in the elderly.
Influenza Viral Infection is a High-Risk Factor for Developing Coronavirus Disease 2019 (COVID-19)
Authors: Zhang Lei , Zhang Youwei
Published: March 2020

Coronavirus disease 2019 (COVID-19) is caused by infection with the 2019 novel coronavirus 2 (2019-nCoV, now referred to as SARS-CoV-2). COVID-19 has become a global pandemic since its outbreak at the end of Dec 2019. COVID-19 could lead to severe acute respiratory disease, especially to those who have reduced immunity. Binding of the viral Spike protein (S) to its receptor ACE2 (Angiotensin Converting Enzyme 2) on the surface of target cells has been proven to be key for virus entry and infection. Although ACE2 expression in the respiratory system is necessary for pneumonia infection by SARS-CoV-2, the regulation of ACE2 gene expression remains poorly investigated, especially for patients that are in pre-pathological conditions. Here, by analyzing The Gene Expression Omnibus (GEO) database, we investigated the expression regulation of ACE2 in various kinds of primary epithelial cells from the respiratory system after influenza A or respiratory Syncytial Virus (RSV) infection. Our analyses reveal that infection of influenza A, RSV or influenza vaccines greatly increased ACE2 expression, suggesting that influenza viral infection could represent a high risk factor for developing COVID-19. We also found that the regulatory effect of influenza A virus on ACE2 expression is associated with activation of the interferon beta-induced pathway and viral RNA-activated host response. Together, our data provide a theoretical framework for clinical classification for SARS-CoV-2 infection susceptibility and could be used for future prevention and therapy treatment for COVID-19.
Modification of Graphene Oxide and Preparation of RuO2 Nanocomposites
Authors: Park Kyeong-Won
Published: March 2020

Graphene-oxide (G) was prepared by the Hummers’ method. A G-COOH layer was synthesised using chloroacetic acid and G. To fabricate carboxylated graphene-RuO2 (G-COORu) nano¬¬-composites, RuO2 nano particles were grown on graphene layers using a one-step thermal method, -COOH(G-COOH), and RuCl3. All materials were characterised using X-ray diffraction, transmission electron microscopy, scanning electron microscopy, 13C-nuclear magnetic resonance as well as X-ray photoelectron, Fourier-transform infrared spectroscopy, and Raman. The electrochemical characteristics of the G-COORu supercapacitors were analysed using electrochemical impedance spectroscopy, cyclic voltammetry, constant current charge–discharge tests, and Nyquist impedance plots. The supercapacitors exhibit a specific capacitance of ~125 F g-1 at 100 mA cm-2 within the potential range of 0–1.0 V. The method used here provides a simple approach for the deposition of RuO2 nano particles on graphene layers and can be widened to the fabrication of other classes of hybrids based on G layers for specific technical applications.
Application of Clifford Algebra in Solving the Eigen Equations of Quantum Mechanics
Authors: Gu Ying-Qiu
Published: March 2020

Clifford algebra is unified language and efficient tool for geometry and physics. In this paper, we introduce this algebra to derive the integrable conditions for Dirac and Pauli equations. This algebra shows the standard operation procedure and deep insights into the structure of the equations. Usually, the integrable condition is related to the special symmetry of transformation group, which involves some advanced mathematical tools and its availability is limited. In this paper, the integrable conditions are only regarded as algebraic conditions. The commutators expressed by Clifford algebra have a neat and covariant form, which are naturally valid in curvilinear coordinate system and curved space-time. For Pauli and Schr\"odinger equation, many solutions in axisymmetric potential and magnetic field are also integrable. We get the scalar eigen equation in dipole magnetic field. By the virtue of Clifford algebra, the physical researches may be greatly promoted.
Durability and Microstructural Properties of Triple-Binder-Stabilized Marine Deposit Clay
Authors: Hanafi Mohamad , Ekinci Abdullah , Aydin Ertug
Published: March 2020

Marine clay deposits are commonly found worldwide. Considering the cost of dumping and the related environmental concerns, an alternative solution involving the reuse of soils that have poor conditions is crucial. In this research, the authors examined the durability of marine deposited clays and compiled a corresponding database. The use of slag alone as a binder, at any percentage, increased the accumulated mass loss (ALM) up to 2%. However, the use of lime as the third binder seemed to accelerate the chemical reactions associated with the hydration of clay and cementitious material and to enhance the chemical stability, i.e., samples that included both lime and slag experienced the same ALM as samples treated with cement only. Scanning electron microscopy analysis confirmed the durability improvements of these clays. The proposed unconfined compressive strength and accumulated mass loss relationship yielded practical approximation for the fine- and coarse-grained soils blended with up to three binders until 60 days of curing.
Current Status and Future Prospects of Applying Bioinspired Superhydrophobic Materials for Stone Artworks Conservation
Authors: Cao Yijian , Salvini Antonella , Camaiti Mara
Published: March 2020

The development of innovative materials is one of the most important focuses of research in heritage conservation. Eligible materials can not only protect the physical and chemical integrity of artworks, but also preserve their artistic and aesthetic features. Recently, as one of the hot research topics in materials science, biomimetic superhydrophobic materials have gradually attracted the attention of conservation scientists due to their unique properties. In fact, ultra-repellent materials are particularly suitable for hydrophobization treatments on outdoor artworks. Owing to their excellent hydrophobicity, superhydrophobic materials can effectively prevent the absorption, penetration of liquid water as well as the condensation of water vapor, thus greatly relieving water-induced decay phenomena. Moreover, in presence of liquid water, the superhydrophobic surfaces equipped with self-cleaning property can clean the dirt, dust deposited spontaneously, thereby restoring the artistic features simultaneously. In the present paper, besides the basic principles of wetting on solid surfaces, materials and methods reported for preparing bioinspired ultra-repellent materials, the recently proposed materials for art conservation are also introduced and critically reviewed. Lastly, the current status and the problems encountered in practical application are also pointed out, and the focus of future research is prospected as well.
Complete Genome Sequence of a Distinct Isolate of Cassava common mosaic virus (CsCMV) Infecting Cassava in Hainan, China
Authors: Yu Nai-tong , Yang Yi , Li Jun-hua , Li Wei-li , Liu Zhi-xin
Published: March 2020

The complete genomic sequence of a Cassava common mosaic virus Linggao isolate (CsCMV-LG) was determined from cassava (Manihot esculenta Crantz) with mild leafy mosaic symptom to no symptom in China. Excluding the poly(A) tail, the CsCMV-LG genome (GenBank accession No. MT038420) is 6374 nucleotides (nts) in length, with five major open reading frames encoding a 1450-amino acids (aa) RNA-dependent RNA polymerase (RdRp), three triple gene block (TGB) proteins (231-aa, 110-aa and 95-aa), and a 229-aa coat protein (CP). Phylogenetic analysis indicated that the complete genome of the CsCMV-LG is closely related to that of CsCMV-Brazilian which has been assigned to the genus Potexvirus, but the sequence identity shared only 88.0%. Notable, the mild CsCMV-LG isolate can also infect Nicotiana benthamiana in laboratory through rub inoculation causing mild vein yellowing at 15-day post inoculation. This is the first full-length genome sequence of a distinct isolate of Cassava common mosaic virus (CsCMV) infecting cassava in Hainan, China.
Vitamin B12 May Inhibit RNA-Dependent-RNA Polymerase Activity of nsp12 from the SARS-CoV-2 Virus
Authors: Narayanan Naveen , Nair Deepak T.
Published: March 2020

SARS-CoV-2 is the causative agent for the ongoing COVID19 pandemic, and this virus belongs to the Coronaviridae family. Like other members of this family, the virus possesses a positive-sense single-stranded RNA genome. The genome encodes for the nsp12 protein, which houses the RNA-dependent-RNA polymerase (RdRP) activity responsible for the replication of the viral genome. A homology model of nsp12 was prepared using the structure of the SARS nsp12 (6NUR) as a model. The model was used to carry out in silico screening to identify molecules among natural products, or FDA approved drugs that can potentially inhibit the activity of nsp12. This exercise showed that vitamin B12 (methylcobalamin) may bind to the active site of the nsp12 protein. A model of the nsp12 in complex with substrate RNA and incoming NTP showed that Vitamin B12 binding site overlaps with that of the incoming nucleotide. A comparison of the calculated energies of binding for RNA plus NTP and methylcobalamin suggested that the vitamin may bind to the active site of nsp12 with significant affinity. It is, therefore, possible that methylcobalamin binding may prevent association with RNA and NTP and thus inhibit the RdRP activity of nsp12. Overall, our computational studies suggest that methylcobalamin form of vitamin B12 may serve as an effective inhibitor of the nsp12 protein.
Fenomenologia Sociológica de Alfred Schutz: contribuições para a investigação qualitativa em prática educativa
Authors: Crusoé Nilma Castro , Santos Edmilson Menezes
Published: March 2020

Esse artigo tem como objetivo apresentar resultado de pesquisa sobre contribuições da Fenomenologia Sociológica de Alfred Schutz, para a investigação qualitativa em prática educativa. Inicialmente apresenta fundamentos husserlianos presentes na fenomenologia shutziana. Em seguida, a aplicação metodológica da fenomenologia sociológica, em pesquisas sobre prática educativa e as seguintes contribuições: a) apreensão da prática educativa como objeto da consciência, o que significa apreendê-la na sua dimensão subjetiva; b) reflexão sobre o papel do pesquisador e do pesquisado na relação de pesquisa, tomando o campo empírico como campo de problematização; c) refinamento de instrumentos de produção e análise de dados; d) potencialização da pesquisa como processo.
Professionalization, Local Military Context, and Reconstruction of the Army in Afghanistan
Authors: DEMİR Cenker Korhan
Published: March 2020

Security sector reconstruction is a long-debated topic in the peacekeeping and state-building literature. The primary goal of any reconstruction program in conflict-ridden countries is to build up security institutions, which are prerequisites for sustainable development and democratization. This study aims to examine how security sector institutions, specifically the armed forces, have been reconstructed by intervening actors in post-conflict countries like Afghanistan. It argues that army reconstruction programs that are developed without any elaboration of the peculiar conditions of the related post-conflict countries, are unlikely to be successful. As such, initiatives aimed at security sector reconstruction need to take account of the idiosyncratic characteristics of the conflict affected country and its institutions, and the program should be devised conforming to the case-specific circumstances. This research aims to identify reliable evidence to support this argument by analyzing data collected from both primary and secondary resources. It also aims to contribute methodologically by building upon the first-hand impressions of practitioners from various countries over their reconstruction activities.
TECTONICA DE GRAVEDAD Y MOVIMIENTOS DE PLACAS
Authors: Rangin Claude , Le Pichon Xavier , Martinez-Reyes Juventino , Aranda-Garcia Mario
Published: March 2020

Aquí presentamos los trabajos de este volumen que conciernen la tectónica cenozoica de la margen occidental del Golfo de México, desde Texas en los Estados Unidos de Norteamérica, hasta la región de Veracruz en México.

Estos trabajos que fueron realizados tanto en tierra como en mar, ilustran las relaciones estructurales y cinemáticas que existen entre los deslizamientos gravitacionales superficiales y los movimientos corticales profundos en el marco geodinámico complejo de México, lugar donde se juntan las placas Norteamericana, Caribe y Pacífica, sin olvidar la placa Farallón. Pensamos que los movimientos corticales profundos inducen y/o facilitan los deslizamientos sedimentarios observables en la margen.
Diversite des clinopyroxenites a grenat associees aux massifs ultramafiques orogeniques; eclogites, ariegites, griquaites et grospydites; une discussion
Authors: Kornprobst Jacques , Piboule Michel , Tabit Abdelhalim
Published: March 2020

Chemical composition of rocks belonging to the garnet clinopyroxenite clan (eclogites, griquaites, grospydites) are plotted in the Al 2 O 3 -FeO-MgO diagram. Compositions of eclogites from metamorphic series define a trend corresponding to liquids resulting from the low-pressure cotectic precipitation of ol+cpx+pl. These data support the igneous nature of the material and suggest that the original rocks experienced crystallization of the crust. Garnet clinopyroxenite inclusions from kimberlites and alkali basalts as well as garnet clinopyroxenite lenses from high temperature peridotite bodies define a different trend that can be interpreted as resulting from cpx+gt precipitation from a basic melt. The unusual position of these latter rocks justify that the term "griquaite" be applied to them. Corundum and/or kyanite bearing eclogites from metamorphic series as well as "grospydites" included in kimberlites or alkali basalts, or found as lenses in ultramafic bodies), plot toward the Al-rich apex of the Al-F-M diagram, but show different SiO 2 /Al 2 O 3 : the term "grospydite" appears fully justified to describe the latter, and distinguish them from the former (metamorphic) ones. The origin of grospydites is still in debate: they may be the products of high pressure crystallization of basic liquids. or of metasomatic crystallization of gabbros recycled within the mantle. The coexistence within the Beni Bousera massif in northern Morocco of griquaites and grospydites indicates the large heterogeneity of this upper mantle fragment. This heterogeneity can only be explained by a complex geodynamic evolution characterized by either 1) the succession of two distinct episodes of basic melt production; or 2) a cyclical mechanism implying the subduction in the mantle of a lithospheric fragment followed by the adiabatic ascension of this fragment towards the surface.
Sur deux Oppelia de la collection de Grossouvre
Authors: Douville F.
Published: March 2020

Two species of the Jurassic ammonite Oppelia from the Grossouvre collection in the Sorbonne. Oppelia nodosa n. sp. from the middle Callovian of several localities in France is described, and O. inflexa from the Bathonian redescribed.
Les surfaces d'usures et les remaniements dans le Jurassique de Basse-Normandie
Authors: Bigot A.
Published: March 2020

Describes eroded and reworked surface in various Jurassic zones in lower Normandy, France.
Mode particulier de nutrition de certains echinodermes; l'ouverture interne de la bouche
Authors: Delpey Genevieve
Published: March 2020

Specialized food habits of certain echinoderms. Cites numerous examples of echinoderms--crinoids (Camerata and Adunata) and cystoids (Caryocrinus, Dendrocystis, Cothurnocystis, Cyclocystoides)--in which the mouth is not directly exposed on the surface of the animal. In some, the plates covering the mouth and food grooves constitute part of the tegmen.
Organes speciaux d'echinodermes primitifs; les pectinirhombes
Authors: Delpey Genevieve
Published: March 2020

Describes special organs of primitive echinoderms, pectinirhombs, on the basis of which the new suborder Pectinirhombifera is established. It is very possible that the role of the pectinirhombs was to maintain equilibrium.
Jurassique inferieur de la Sarthe et du Maine-et-Loire
Authors: Bigot A.
Published: March 2020

Describes sections of the lower Jurassic of Sarthe and Maine-et-Loire, France, exposed in numerous quarries and road cuts.
Un bassin houiller paralique d'age cenomanien; les lignites de Pont-Saint-Esprit
Authors: Pruvost Pierre
Published: March 2020

The upper Cenomanian lignites of the Pont-Saint-Esprit area in the Rhone river region, France, represent a small paralic Cretaceous coal basin.
Le compartiment granitique sureleve de Saint-Yvoine (Puy-de-Dome)
Authors: Garde G.
Published: March 2020

Crustal movements during the Miocene and the early Pliocene caused the dislocation and uplift of the Saint-Yvoine granitic mass, Puy-de-Dome, France. The structure of the mass is characterized by two sets of fault systems.
Donnees nouvelles sur le Jurassique rouge a dinosauriens du Grand et du Moyen-Atlas (Maroc)
Authors: Termier Henri
Published: March 2020

New data on Dogger and Liassic dinosaur-bearing zones in continental Jurassic red beds of the Atlas ranges, Morocco.
Une dune fossile a Dourdan (Seine-et-Oise)
Authors: Cailleux Andre
Published: March 2020

Describes a fossil dune discovered in the Dourdan forest, Seine-et-Oise, France. Its exact age could not be determined; it may be Quaternary in age, or may even have been formed in historic time.
Application de l'analyse mineralogique quantitative dans la genetique des formations superficielles et des sols en particulier
Authors: Brajnikov Boris
Published: March 2020

Discusses the application of quantitative mineralogical analyses to the study of the genesis of surface deposits and soils in particular.
Sols polygonaux et fentes de dessiccation [with discussion]
Authors: Romanovsky Vsevolod , Cailleux A.
Published: March 2020

Discusses the origin and form of polygonal soils and desiccation cracks, noting especially the differences between a zone of polygonal soils and a network of desiccation cracks.
A. P. Dutertre (1890-1940)
Authors: Lutaud Leon
Published: March 2020

Biography and list of writings of the French regional geologist Auguste Pierre Dutertre, who contributed extensively to the geology of the Boulogne region.
Sur les accidents tectoniques de la bordure occidentale du bassin de Paris et, en particulier, sur ceux du Perche et du Haut-Maine
Authors: Dangeard Louis
Published: March 2020

Discusses the structural relations and orientation of tectonic dislocations along the western border of the Paris basin, France, with special reference to deformation in the Perche-upper Maine region.
Les anciens volcans des Cotes de Clermont, du puy de Chanturgue et du puy de Var (pres de Clermont-Ferrand)
Authors: Garde G.
Published: March 2020

The Cotes de Clermont, Chanturgue, and Var hills, near Clermont-Ferrand, France, are not remnants of an ancient basalt plateau which has been dissected and eroded, but constitute three distinct volcanic massifs. They were probably formed during the middle Miocene.
Facies et divisions du Cenomanien des Alpes-Maritimes
Authors: Parent H.
Published: March 2020

An account of the deep-sea, shallow-water, and transitional facies and the stratigraphic subdivisions of the Cenomanian (Cretaceous) of the Alpes-Maritimes region, France.
La base du Bajocien superieur des environs de Nancy
Authors: Maubeuge Pierre L.
Published: March 2020

Describes the beds at the base of the upper Bajocian (Jurassic) of the Nancy area, France, with special reference to included ammonites.
Observations sur la tectonique de la zone subbetique dans la province de Murcie
Authors: Fallot Paul
Published: March 2020

The sub-Betic zone in Murcia province, Spain, is a nappe characterized by the presence of second-degree thrusting. The nappe comprises two superimposed elements--a lower member composed of plastic Triassic beds which were thrust over the foreland for some 15 to 30 kilometers and an upper member composed of Mesozoic and Tertiary formations which were first folded and then thrust over the foreland for an even greater distance than the lower member.
Sur Flabellina lacostei et Flabellina coranica, deux especes nouvelles du Cretace superieur du Gharb (Maroc septentrional)
Authors: Marie Pierre
Published: March 2020

Describes the four principal species of Flabellina, including F. lacostei n.sp. and F. coranica n.sp., which are present in upper Cretaceous deposits of the Gharb region, northern Morocco.
L'anticlinal du Gros Foug au nord de Serrieres-en-Chautagne (Savoie)
Authors: Hirtz Pierre
Published: March 2020

The Gros Foug anticline north of Serrieres-en-Chautagne, France, is essentially a typical Jura structure. The absence of important faults and other atypical features are attributed to the fact that a thick overburden partially or completely covered the Jurassic core of the anticline.
Observations sur les depots alveolaires de sables marins dans la region de Ronce-les-Bains (Charentes-Maritimes)
Authors: Baudoin Rene
Published: March 2020

Describes alveolar deposits of marine beach sands found in the Ronce-les-Bains region, southern France. Even after treatment, the sand grains float on water.
Les gisements de vertebres villafranchiens de l'Afrique du nord
Authors: Arambourg Camille
Published: March 2020

Summarizes data on Villafranchian vertebrate localities in north Africa. The fauna indicates that the Villafranchian deposits of north Africa are contemporaneous with those of Europe and with early Pleistocene deposits of east Africa.
Les invertebres marins de l'Oligocene de Basse-Alsace
Authors: Gillet S.
Published: March 2020

Describes the marine invertebrate fauna--mollusks, crustaceans, including a new species of Galathea, and the echinoid Aplospatangus acuminatus--of Oligocene deposits of lower Alsace, France.
Remarques tectoniques sur les environs de Morteau (Doubs)
Authors: Perrodon A.
Published: March 2020

The Morteau syncline, Doubs, France, is bounded on the west by the Tantillon anticline. Both are asymmetric structures. Overturning of the west flank of the syncline and formation of pinched structures are attributed to post-tectonic adjustments and sliding by gravity of plastic Neocomian (Cretaceous) beds and rigid Malm (Jurassic) blocks of the sedimentary cover.
Metallogenie hydrothermale et failles vivantes [with discussion]
Authors: Raguin Eugene
Published: March 2020

The formation of hydrothermal veins and associated metasomatic deposits is a process of long duration, during which alternating and recurrent phases of mineralization and fracturing take place. The quantity of ore relative to the dilute nature of hydrothermal solutions, the regularity of normal paragenetic suites, and the zonal distribution of ores, which indicates a gradual decrease in the temperature of the solutions, are considered evidence of the slow process. Zoned structures and other textural features testify to the multiple phases of the mineralization cycle. Reactivated faults permit renewed circulation of hydrothermal solutions, but are not necessarily the cause of mineralization.
Sur les relations de la zone du flysch des Aiguilles d'Arves et du massif du Pelvoux
Authors: Gidon Paul
Published: March 2020

Identifies the southernmost extension known to date of the Aiguilles d'Arves Flysch zone in one of the thrust slices bordering the eastern slope of the Pelvoux massif, France.
Problemes de tectonique hercynienne dans le sud-est du Massif Central francais
Authors: Geze Bernard
Published: March 2020

Discusses the tectonic relations between Hercynian (Paleozoic) nappes, isoclinal folds, and imbricate thrust structures in the southeast Central Massif region, France. Two types of nappes are present--overthrust recumbent folds and thrust slices.
Sur les chrysostomatacees du bassin tertiaire de Menat (Puy-de-Dome)
Authors: Firtion Fridolin
Published: March 2020

Describes chrysostomataceans (including new species) from Tertiary lignites, probably middle Eocene in age, of the Menat region, Puy-de-Dome, France.
Litage et divisibilite
Authors: Maitre Paul
Published: March 2020

Defines bedding, cleavage, and other types of parting planes in metamorphic rocks, noting that cleavage is associated with a fabric in which orientation of the feldspar crystals took place during crystallization and resulted in parallel arrangement of homologous faces, as distinct from schistosity which is the product of mechanical processes.
Sur la presence d'Archiacina armorica dans le bassin de Paris
Authors: Alimen Henriette , Lucas G.
Published: March 2020

The foraminifer Archiacina armorica has been found in several Stampian (Oligocene) localities northwest of Paris, France, although its occurrence in the Paris basin is rare relative to its abundant occurrence in the Rennes basin.
Observations sur les nodules a structure cone-in-cone de l'Arenig de la Montagne Noire
Authors: Bonte Antoine
Published: March 2020

Describes cone-in-cone structures from middle Arenig (Ordovician) deposits of the Montagne Noire, France, and concludes that the structures are organic concretions which later were subjected to lateral pressures, not necessarily of tectonic origin.
Anancus osiris, un mastodonte nouveau du Pliocene inferieur d'Egypte
Authors: Arambourg Camille
Published: March 2020

An account of the tooth of Anancus osiris from lower Pliocene deposits of Egypt; a description of the tooth of a more primitive related mastodon from Miocene deposits of Kenya is appended. The tooth from Kenya is assigned to Protanancus macInnesi n.g. n.sp.
Remarques sur les faunes de foraminiferes du Redonien
Authors: Roger Jean
Published: March 2020

Discusses the paleoecologic relations and composition of the foraminiferal faunas of most of the known occurrences of Redonian deposits in France. Although foraminifers are not abundant and exhibit local variation, an assemblage characteristic for the Redonian could be distinguished, consisting of members of Rotalia, and Elphidium with or without Polymorphinidae. The faunas indicate that the enclosing deposits are basal Pliocene beds which were formed in a littoral zone.
Le developpement des genres de foraminiferes Ceratobulimina et Lamarckina
Authors: Dam Ab ten
Published: March 2020

On the basis of a study of material from Cretaceous and Tertiary deposits of the Netherlands, traces the development of foraminifers belonging to Ceratobulimina and Lamarckina from L. rjaesanensis, a Jurassic form which is considered the common ancestor of members of both genera.
Les especes du genre de foraminiferes Quadratina, genre nouveau de la famille des Lagenidae
Authors: Dam Ab ten
Published: March 2020

Describes the various members (including one new species) of the new foraminiferal genus Quadratina.
L'horizon manganesifere de la moyenne Cote d'Ivoire
Authors: Molly E. W.
Published: March 2020

A zone of manganese ore of potential economic value occurs in Birremian (Precambrian) deposits of the central part of the Ivory Coast region, French West Africa. The ore was probably formed by transformation of manganiferous muds to gondites during intense metamorphic and tectonic activity at the end of the Birremian.
Role aquifere des alluvions tuffacees dans les vallees seches du Quercy
Authors: Astre Gaston
Published: March 2020

Discusses the role of calcareous tufa deposits in the ground-water hydrology of dry valleys, citing two examples of the occurrence of calcareous tufa in alluvial deposits of dry valleys of the Quercy region, France. The tufa is considered the product of subterranean deposition from waters, which at one time had emerged as a spring and deposited tufa on the surface at the foot of the valley slope, but which later percolated along newly formed lower-level fissures.
Stratigraphie du Cretace superieur et de l'Eocene inferieur dans la Chalosse de Montfort (Landes)
Authors: Cuvillier J. , Dupouy-Camet J.
Published: March 2020

An account of the stratigraphic sequence and depositional history of upper Cretaceous and lower Eocene deposits of the Chalosse de Montfort area, Landes, France, with special reference to the lateral and vertical variations of facies of the lower Eocene strata.
Disposition des enclaves du granite et granitisation [with discussion]
Authors: Cailleux Andre
Published: March 2020

The orientation of diorite xenoliths in granite of the Saint-Jean-du- Doigt region, Finistere, France, indicates that they are in place and represent the relics of diorite which was granitized by recrystallization in the solid state.
Donnees stratigraphiques nouvelles sur l' "Aalenien ferrugineux" (Yeovilien superieur) de Lorraine et en particulier dans le bassin de Nancy
Authors: Maubeuge Pierre L.
Published: March 2020

Presents stratigraphic and paleontologic evidence which supports the claim that three, not four, oolitic iron ore beds are present in the Aalenian (Jurassic) deposits of the Nancy basin and other parts of Lorraine, France.
La stratigraphie des limons quaternaires de la carriere Bouchon, a Ivry (Seine) et ses repercussions possibles sur la chronologie prehistorique
Authors: Bordes F.
Published: March 2020

Two zones of reworked deposits are identified in the Quaternary succession exposed in the Bouchon quarry at Ivry, Seine, France. Atypical upper Acheulian artifacts found in loams produced by alteration of the older loess cannot therefore be dated as upper Acheulian without further study of the stratigraphic relations of the enclosing loam, whose age may vary from Riss to Wuerm (Pleistocene) depending upon the circumstances of reworking.
Y a-t-il coupure ou continuite entre le dynamometamorphisme et le metamorphisme regional?; a propos d'observations pres du glacier de Tre-la-Tete [with discussion]
Authors: Perrin Rene , Roubault Marcel
Published: March 2020

Presents arguments in support of the concept that dynamometamorphic processes (recrystallization by mechanical deformation during which no material is added from sources outside the rock mass being deformed) and regional metamorphism (rock alteration accompanied by the additionof material from adjacent terrain or from depth) are parts of a same process and not distinct independent processes. The concordance exhibited by a differentially metamorphosed mass of Liassic limestones wedged in crystalline rocks of the Mont Blanc massif, exposed in a gorge near the tongue of the Tre-la-Tete glacier, France, is cited as an example of recrystallization which took place during the regional metamorphism associated with Alpine crustal movements.
Remarques sur Equus hydruntinus Regalia
Authors: Alimen Henriette
Published: March 2020

Describes remains of Equus hydruntinus from several Pleistocene localities in France and concludes that E. hydruntinus is a specialized archaic type which had not evolved to any considerable degree from the ancestral form and which may represent an ancestor of present-day Shetland ponies.
Quelques tourbieres de la montagne de la Madeleine
Authors: Dubois Georges , Dubois Camille
Published: March 2020

Reports the results of statistical analyses of plant fragments and pollen contained in several peat deposits of the Madeleine mountain, France, on the basis of which three periods are distinguished in the postglacial forest history of the massif.
Faune et morphologie des alluvions anciennes de l'Ornain et de l'Ante
Authors: Paque A.
Published: March 2020

The ancient alluvial deposits of the Ornain and Ante river valleys, Meuse region, France, are characterized by the presence of a mixed fauna and detrital material whose morphology indicates deposition in an extremely wet period during which there was extensive gullying and erosion.
Sur le minerai de fer oolithique de Moulaine et sur la presence dans ce minerai d'un mineral phosphate
Authors: Caillere Simonne , Kraut F.
Published: March 2020

Microscope and thermal analyses of material from various mineralized zones of the oolitic iron ore formation of Moulaine in the Longwy basin, France, reveal the presence of francolite, abundant kaolinite, and detrital quartz accompanied by mica, feldspar, and zircon. The ores were formed in a silica- and aluminum-rich carbonate milieu; the iron was concentrated almost completely in the oolites, in the form of a gel.
Elianella nov. gen. elegans nov. sp., organisme constructeur de calcaires typiquement developpe dans le Paleocene du SW malgache
Authors: Pfender Juliette. , Basse E
Published: March 2020

Describes the calcareous rock-building alga Elianella elegans n.g. n.sp. from Paleocene deposits of southwestern Madagascar.
Lucien Cayeux (1864-1944)
Authors: Leriche Maurice
Published: March 2020

A biographic account and list of writings of the French geologist Cayeux, specialist in the study of sedimentary rocks.
Les grandes unites structurales du Bresil
Authors: Brajnikov Boris
Published: March 2020

The major structural units of Brazil consist of four Precambrian massifs and five zones of sedimentation which are represented by a zone of subsidence, a tectonic trough, and epicontinental basins.
La faille de la Borne et ses mineralisations (Massif Central francais)
Authors: Lapadu-Hargues Pierre
Published: March 2020

The Borne fault traversing the Borne granitic complex in the Central Massif, France, is characterized by evidence of renewed movement and successive phases of mineralization. Subsequent to injection of granulites, with which formation of the fault was associated, gold-and sulfide-bearing veins were formed. During the second phase of mineralization barite and some argentiferous galena were deposited in fractures of the fault zone. The final phase of mineralization was essentially one of fluorite formation.
Quelques remarques sur Equisetum mytharum (Heer) et sur ses gisements dans l'est et le sud-est de la France
Authors: Ricour Jean
Published: March 2020

Detailed description of remains of Equisetum mytharum from Triassic deposits of eastern and southeastern France. The distribution of E. mytharum localities indicates that the Triassic of the Alpine zone was not completely isolated by a land barrier from the Triassic basins of Provence and Lorraine.
Observations sur le genre de foraminiferes Karreria Rzehak 1891
Authors: Dam Ab ten
Published: March 2020

Describes foraminifers belonging to the genus Karreria from Paleocene deposits of Algeria and concludes that they are distinct from members of Cibicides.
Observations geologiques sur les iles du Cap Vert
Authors: Pires Soares J. M.
Published: March 2020

Discusses the stratigraphic relations and outlines the paleogeographic history of upper Jurassic to Quaternary formations of the Cape Verde islands.
Sur l'age de l'oolithe ferrugineuse dans le Jura neuchatelois et les regions voisines
Authors: Jeannet A.
Published: March 2020

The ferruginous oolitic formation in the Jura mountains of Neuchatel, Switzerland, and in other Jura localities are Callovian rather than lower Argovian in age. Both Callovian and Oxfordian (Jurassic) deposits, considered by some to be absent in the central Juras, were found to occur throughout the region, although generally in thin beds.
Observations sur la deformation d'un calcaire metamorphique (Adamello meridional)
Authors: Goguel Jean
Published: March 2020

Describes two samples of metamorphosed Anisian (Triassic) limestone from the central Adamello massif, Italy, exhibiting the effects of deformation which took place after metamorphism and after intrusion of the massif, and discusses the mechanics of deformation on the basis of experimental investigations and their interpretation. Deformation was essentially a process of solution and recrystallization, accompanied by fissuring throughout the limestone and by rotation of fragments in the less plastic zones of the limestone.
La faune des grauwackes de Chauffour pres Saint-Barthelemy (Maine-et-Loire)
Authors: Pillet J.
Published: March 2020

Describes the fauna (mainly trilobites and brachiopods) of Devonian graywackes of the Chauffour area, Maine-et-Loire, France, and discusses the age, probably upper Siegenian, of the graywackes.
Mouvements tectoniques jeunes en Anatolie
Authors: Lahn Ervin
Published: March 2020

Describes a series of dislocated structures produced by post-Tertiary tectonic activity (which is continuing into the present) in Turkey. Although formed considerably later than the Alpine orogeny, the orientation of the structures generally follows that of the axes of Alpine folds.
Etude statistique de l'evolution du cephalon chez les trilobites Proparia et Opistoparia
Authors: Hupe Pierre
Published: March 2020

A statistical study of morphologic elements of the cephalon of proparian and opistoparian trilobites shows that the neotenic tendency is striking in the Proparia, which accounts for the increase in longevity and variability of both groups.
Quelques mollusques du Cretace de Colombie
Authors: Basse Eliane
Published: March 2020

Describes ammonites from Coniacian (Cretaceous) deposits of the eastern cordilleran region of Colombia, and discusses the stratigraphic relations of Cretaceous formations along the cordillera on the basis of included faunas. Descriptions of new species of the new subgenus Donjuaniceras and the new genus Subprionotropis are included.
Anomalies et regenerations chez quelques Asterozoa paleozoiques
Authors: Lehmann W. M.
Published: March 2020

The abnormal number of arms-- generally four or six instead of the usual five--of several species of asterozoans from lower Devonian deposits of the Hunsrueck region, Germany, is attributed to processes of regeneration, such as can be observed in living ophiurans. Regeneration subsequent to partition of a normal ophiuran into one part with three arms and one part with two arms produced a six-armed and a four-armed ophiuran respectively.
Sur la formation de gneiss oeilles et de granites d'anatexie, d'apres des observations dans des zones orogeniques de differentes epoques
Authors: Gleditsch Chr. C.
Published: March 2020

Cites examples from Precambrian and Caledonian (early Paleozoic) terrain in Norway and from the French Pyrenees which demonstrate that anatectic granite is sometimes the final product of migmatization and that in zones of intense orogenic activity the granite is transformed into an augen gneiss.
Donnees nouvelles sur la geologie du Brianconnais oriental et sur le probleme de la quatrieme ecaille
Authors: Lemoine Marcel
Published: March 2020

Presents new data on the geology of the eastern Brianconnais region (defined here as the mountains lying between Oisans, France, to the west, and the Schistes lustres zone of Piedmont, Italy, to the east). At the latitude of Briancon, France, the zones of facies encountered from west to east are the Subbrianconnais, the Brianconnais, and the Gondran. It is suggested that the crystalline schists of the thrust slices of the eastern Brianconnais region are not outlying remnants of a Schistes lustres nappe, but are pre-Verrucano Paleozoic masses, lacking Carboniferous beds, which belong to the Gondran zone. The so-called fourth thrust slice merely represents an extreme westward extension of this series.
Sur la valeur stratigraphique de quelques inocerames algeriens
Authors: Voute C.
Published: March 2020

Several species of Inoceramus from Cretaceous formations of north Africa are valuable because of their rather restricted stratigraphic distribution. These include Inoceramus regularis radiosa (Campanian-Maestrichtian and sometimes Danian), I. labiatus (lower Turonian), and I. cycloides (middle Santonian). For each of these, synonymous forms described in the literature on north Africa, particularly Algeria, are listed.
Note sur la precision des tamisages mecaniques
Authors: Berthois Leopold , Berthois C.
Published: March 2020

A study of the error resulting from mechanical screening of sediments. Theoretically the more prolonged the time, the greater the accuracy of separation; actually, increasing the time increases the amount of breakage of grains, and hence the proportion of finer constituents increases at the expense of the coarser. The percentages of mean square error for different fractions of screened samples are calculated. The resulting figures are of the same order as those found by Gulinck, but somewhat lower.