scholarly journals Palaeoenvironmental context and significance of ferruginous tubular bioforms and other authigenic mineral formations in source-to-sink sedimentary systems

2021 ◽  
Vol 41 (4) ◽  
Author(s):  
A. E. López-Pérez ◽  
B. Rubio ◽  
D. Rey ◽  
M. Plaza-Morlote
Keyword(s):  
Scientific Literature ◽  
Late Quaternary ◽  
Continental Margins ◽  
Tubular Structures ◽  
Sedimentary Evolution ◽  
Source To Sink ◽  
Authigenic Mineral ◽  
Sedimentary System ◽  
Sedimentary Dynamics ◽  
Insight Into

AbstractSurficial sediments on the seafloor from passive continental margins can provide insight into recent Late Quaternary sedimentary dynamics acting over offshore sedimentary systems. This work focuses on the study of some particular ferruginous tubular structures resembling bioforms (FTB) located in the distal Galician Continental Margin (NW Iberian Margin) at water depths between ~ 1550 and ~ 2200 m. The characterisation of these structures made it possible to study in depth their formation environment and subsequent sedimentary evolution during the Late Pleistocene and Holocene. The FTB consist of goethite with a framboidal texture. They were interpreted as formed by an initial pyrite precipitation in reducing microenvironments conditioned by the activity of sediment-dwelling organisms during the early diagenesis. This is followed by the oxidation of pyrite by a combination of hydrothermal fluids and erosional processes, which triggers the formation of the framboidal oxyhydroxides. The data allowed obtaining a comprehensive understanding of the environmental context and the significance of these ferruginous tubules, as there are no previous studies in the scientific literature that describe these structures in a source-to-sink sedimentary system.

scholarly journals Propiedades psicométricas de la Escala de Interacción en las Clases Dirigidas (EICD)

2016 ◽  
Vol 12 (3) ◽  
pp. 840 ◽  
Author(s):  
Adrián Pastor-Barceló ◽  
Vicente Prado-Gascó ◽  
Pilar Bustillo-Casero
Keyword(s):  
Design Methodology ◽  
Scientific Literature ◽  
Small Sample ◽  
Improve Quality ◽  
Validity And Reliability ◽  
Final Version ◽  
First Time ◽  
To Receive ◽  
Insight Into

Purpose: This research focuses on the construction and validation of a scale designed to assess the quality of the supervised classes: Interaction on Supervised Classes Scale (ISCS).Design/methodology/approach: This is a descriptive correlational study. For the construction of the scale three phases were performed in which different experts assessed the adequacy of the items. Finally, the psychometric properties of the final version were studied in a sample of 314 consumers (69.1% women) aged between 18 and 77 with an average of 39.33 years (SD=12.25).Findings: The scale presents adequate validity and reliability, being a useful tool for measuring the interaction in Supervised Classes.Research limitations/implications: The sampling, non-probabilistic or convenience, have taken the sample of a unique sports facility and the small sample size.Practical implications: The ISCS allows managers to receive better feedback, allowing them to obtain deeper insight into the quality and satisfaction of the service. According to its results, the managers may implement different strategies to improve quality in a key service within sports centers.Originality/value: For the first time the interaction between customers and between customers and employees is evaluated both inside and outside the center, a topic that had not yet been studied in the scientific literature. The scale can be applied to any type of directed activity, and will allow a greater understanding of the quality of service.

Neotectonics and large-scale geomorphology of Canada

1993 ◽  
Vol 17 (2) ◽  
pp. 248-264 ◽  
Author(s):  
John Adams ◽  
John J. Clague
Keyword(s):  
Large Scale ◽  
Late Quaternary ◽  
Strike Slip ◽  
Laurentide Ice Sheet ◽  
Continental Margins ◽  
Plate Boundaries ◽  
The West ◽  
Late Mesozoic ◽  
Tectonic Events ◽  
Mountain Systems

Canada includes active convergent and strike-slip plate boundaries, several major mountain systems, two passive continental margins, and a stable craton. Neotectonic activity, as indicated by earthquake occurrence, is highest along the west coast and lowest in the interior of the country. Correlations between tectonics and physiography are strongest in the west. Here, the landscape bears a strong imprint of convergent and strike-slip plate regimes. Late Mesozoic and early Cenozoic tectonic events established the setting in which the present physiography of western Canada developed, but the landscape acquired its present form much more recently, in Pliocene and Quaternary time. In contrast, the neotectonic imprint in eastern and northern Canada is enigmatic, and although major concentrations of earthquakes in many areas are associated with reactivated, early Phanerozoic structures, there has been only limited late Quaternary faulting. The vast Canadian craton, despite its very low seismicity, is deforming isostatically at a moderate rate due to melting of the Laurentide Ice Sheet thousands of years ago.

scholarly journals Underwater faunal assemblages: radiocarbon dates and late Quaternary vertebrates from Cold Lake, Alberta and Saskatchewan, Canada

2018 ◽  
Vol 55 (3) ◽  
pp. 283-294
Author(s):  
Christopher N. Jass ◽  
Devyn Caldwell ◽  
Christina I. Barrón-Ortiz ◽  
Alwynne B. Beaudoin ◽  
Jack Brink ◽  
...  
Keyword(s):  
Late Quaternary ◽  
Faunal Remains ◽  
Radiocarbon Dates ◽  
East Central ◽  
Faunal Assemblages ◽  
History Of ◽  
Cold Lake ◽  
The Last Glacial Maximum ◽  
Insight Into ◽  
The Last Glacial

Late Quaternary faunal remains from three underwater settings in Cold Lake, Alberta and Saskatchewan, Canada, include at least 13 vertebrate taxa consistent with assemblages that postdate the Last Glacial Maximum (LGM). Seven new radiocarbon dates range from 10 350 ± 40 to 161 ± 23 years BP and provide insight into the post-LGM biotic history of east-central Alberta and west-central Saskatchewan. The presence of an essentially modern large mammal biota is suggested for the mid-Holocene, and possibly earlier, if the absence of extinct or extirpated taxa in association with Late Pleistocene Bison at the Alberta–Saskatchewan site is meaningful. Taphonomically, some of the remains suggest deposition in open environments during the Holocene, possibly when lake levels were lower. The recovery of late Quaternary faunal remains from a present-day lacustrine setting is novel, and suggests that similar records may occur in other lakes in western Canada, including those in areas with scarce Quaternary vertebrate records.

scholarly journals Patterns in plagiarism and patchwriting in science and engineering graduate students' research proposals

2013 ◽  
Vol 9 (1) ◽  
Author(s):  
Michelle Vieyra ◽  
Denise Strickland ◽  
Briana Timmerman
Keyword(s):  
Graduate Students ◽  
Doctoral Students ◽  
Scientific Literature ◽  
Popular Literature ◽  
Source Material ◽  
Scientific Writing ◽  
Graduate Schools ◽  
Science And Engineering ◽  
Inappropriate Use ◽  
Insight Into

As part of a larger study, written research proposals were collected from 115 science and engineering master’s and doctoral students and reviewed by SafeAssign™ with approximately one-third of them containing sentences that were plagiarised as previously reported in Gilmore, Strickland, Timmerman, Maher and Feldon (2010). (We use the term plagiarism, but do not imply any intentional deceit by the students.) Here we report on the patterns of plagiarised material in the hope that it will contribute to the growing awareness of the problem of plagiarism in graduate schools as well as provide insight into the causes of plagiarism. Instances of plagiarism were coded as to 1) the type of source material (primary, secondary, technical, or popular literature), 2) the nature of the inappropriate use (directly copied, a few words changed, minor grammar alterations, or attempted but insufficient paraphrasing), 3) where in the proposal (introduction, methods, results, or discussion) the plagiarism appeared, and 4) whether or not the plagiarised information was cited and if it was, whether or not the citation was accurate. Plagiarised text was found in 28% of the proposals. Clustering of certain patterns of behaviour, such as directly copying material from popular literature while paraphrasing information from primary scientific literature, were examined in an attempt to gain insight into the cause of the plagiarism. It is our interpretation that the source of the plagiarism was a lack of familiarity with scientific writing as a genre and lack of awareness of its norms and conventions.

scholarly journals Dental fear and anxiety in children: a review of the environmental factors

Folia Medica ◽  
2021 ◽  
Vol 63 (2) ◽  
pp. 177-182
Author(s):  
Maria P. Shindova ◽  
Ani B. Belcheva
Keyword(s):  
Pediatric Patients ◽  
Scientific Literature ◽  
Dental Fear ◽  
Review Of The Literature ◽  
Contributing Factors ◽  
Psychological Reactions ◽  
Behaviour Management ◽  
Factors Associated ◽  
Fear And Anxiety ◽  
Insight Into

Dental fear and anxiety are psychological reactions that interfere significantly with daily life. They are problems suffered by many patients worldwide that remain a significant challenge to providing adequate dental care. The multifactorial etiology of children’s dental fear and anxiety identifies the influence of many different risk factors in its development. The aim of this review article is to analyse the scientific literature regarding the different factors associated with dental fear and anxiety in children. Our review of the literature presents a critical analysis of the contributing factors in dental environment that have been investigated in the literature and provides an insight into the possible explanations on the influence of these factors in pediatric patients. Being familiar with these factors would facilitate behaviour management in anxious children. The findings of the literature review give grounds to undertake studies investigating the influence of contributing factors in all pediatric age subgroups.

scholarly journals GENETIC APPROACHES FOR ENGINEERING BIOTIC STRESS RESISTANCE IN POTATO (Solanum tuberosum L.)

2020 ◽  
Vol 30 (1) ◽  
Keyword(s):  
Biotic Stress ◽  
Scientific Literature ◽  
Solanum Tuberosum L ◽  
Transgenic Potato ◽  
Limiting Factors ◽  
Important Food ◽  
Biotic Stresses ◽  
Transgenic Potatoes ◽  
Insight Into ◽  
Modern Technologies

Potato is one of the most important food crops in terms of annual production and food security worldwide. The crop is affected by several types of biotic stresses, e.g. insects, viruses, fungus, nematodes and weeds, which are the prominent limiting factors for its production. The conventional breeding methods in potato have been associated with limitations; none of the present day commercial cultivar has built-in resistance against biotic stresses. There is strong need for the development of new resistant potato varieties to cope against biotic stresses using non-classical approaches in combination with classical methods. The scientific literature suggests the contribution of modern biotechnological techniques for the development of transgenic potato lines resistant against insects and diseases. The present comprehensive review describes different genetic engineering approaches for the development of transgenic potatoes resistant to insects, weeds, nematodes, fungus and viruses by fellow researchers worldwide. It also gives an insight into modern technologies, e.g. RNAi and CRISPR-Cas9, which have emerged recently and can be implemented in the development of biotic stress resistant potato cultivars.

Platelet-Rich Plasma Injections

2018 ◽  
Author(s):  
Juewon Khwarg ◽  
Daniel A. Fung ◽  
Corey Hunter ◽  
Timothy T. Davis
Keyword(s):  
Clinical Evidence ◽  
Scientific Literature ◽  
Platelet Rich Plasma ◽  
Direct Application ◽  
Therapeutic Effects ◽  
Regenerative Processes ◽  
Autologous Plasma ◽  
The Past ◽  
Preparation Techniques ◽  
Insight Into

Platelet-rich plasma (PRP) is an autologous plasma suspension enriched with a supraphysiologic concentrate of platelets, isolated through a process of centrifugation. Administered locally (usually by injection or direct application) to areas of injury, PRP contains a high density of growth factors, which are believed to potentiate the body’s natural regenerative processes. Over the past 20 years, interest in PRP therapy has grown exponentially, as it offers a relatively safe, autologous treatment modality. It has gained particular popularity for a wide variety of musculoskeletal pathologies. There is a growing body of scientific literature that is giving further insight into PRP’s therapeutic effects. This chapter will review the history, preparation techniques, basic science justifications, current clinical evidence, as well as procedural considerations for the therapeutic use of PRP.

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