scholarly journals Redescription of Centronia melanitis Hübner, 1818 (Lepidoptera: Arctiinae: Arctiini: Ctenuchina) with notes on androconial organs

2021 ◽  
Vol 3 ◽  
pp. ec03029
Author(s):  
Juan Grados ◽  
Karla Mantilla
Keyword(s):  
Scientific Literature ◽  
Sexual Attraction ◽  
Museum Collections ◽  
First Time

The Neotropical genus Centronia Hübner, 1818 is monotypic and represented by the species Centronia melanitis Hübner, 1818. Individuals of this species display diurnal habits and are attracted by plant bait of Heliotropium sp.. Specimens of Centronia are very rare in museum collections. The present study, notes are provided for the male specimens and the first time the female is mentioned in the scientific literature. The presence of androconial organs in Centronia melanitis and other species of Ctenuchina is hypothesized to be related to the visits to pyrrolizidine sources and their role in the pheromones production and the sexual attraction for mating.

The influence of behaviour modifying chemicals on mating success of the red bollworm Diparopsis castanea Hmps. (Lepidoptera, Noctuidae) in Malawi

1976 ◽  
Vol 66 (2) ◽  
pp. 279-300 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Sexual Attraction ◽  
Practical Method ◽  
Pheromone Trap ◽  
Cotton Field ◽  
Field Cage ◽  
Synthetic Sex Pheromone ◽  
Trap Catches ◽  
First Time ◽  
Lepidoptera Noctuidae

AbstractThe synthetic sex pheromone (dicastalure) of the red bollworm of cotton, Diparopsis castanea Hmps., in Central and Southern Africa, and an inhibitor of male sexual attraction (trans-9-dodecenyl acetate,=IIA), were used in an enclosed 0·2 ha cotton field-cage to reduce successful female matings. Over one month dicastalure at 21·0 and 42·3 g/ha produced average reductions in mating of 47·9% and 72·5% respectively and 37·9 g IIA/ha produced an overall reduction in mating of 71·5%, or 79·5% in released moth populations, over the same period. The proportion of virgin females present in disruption situations was significantly greater than in untreated populations and was density-independent for moth populations of up to 2 200/ha. The proportion of fertile eggs in disruption situations was correspondingly reduced to 30·2% from an average of 67·9% in control cycles. Reduction in sex pheromone trap catches is an unsatisfactory indicator of the extent to which males are prevented from inseminating females and considerably over-estimates the true degree of disruption. This is the first time that a naturally occurring inhibitor has been used successfully to disrupt mating in a field population of insects and it indicates the potential of the method for the control of high density pest populations in cotton. However, use of polyethylene dispensing mechanisms similar to those used in the field-cage disruption experiments would be unsuitable as a practical method of dispensing behaviour modifying chemicals and it is suggested that, for suitably controlled release of such chemicals, currently available microencapsulation technology offers the best prospects.

Possible Causes in Breaking of Dental Implants Research

2017 ◽  
Vol 907 ◽  
pp. 104-118
Author(s):  
Maria Stoicănescu ◽  
Eliza Buzamet ◽  
Dragos Vladimir Budei ◽  
Valentin Craciun ◽  
Roxana Budei ◽  
...  
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Scientific Literature ◽  
Surface Characteristics ◽  
Raw Material ◽  
New Materials ◽  
Materials Used ◽  
Type Of Failure ◽  
First Time ◽  
Consequent Increase

Dental implants are becoming increasingly used in current dental practice. This increased demand has motivated manufacturers to develop varieties of product through design, but also looking for new materials used to improve surface characteristics in order to obtain a better osseointegration. But the increase in the use of implants goes to a consequent increase in the number of failures. These failures are caused either by treatment complications (peri-implantitis), by fatigue breakage under mechanical over-stress, by defective raw material, or due to errors during the insertion procedures. Although they are rare, these complications are serious in dentistry. Before to market a dental implant to clinical practitioners, the product is validated among other determinations in number of biocompatibility research. Raw material issues, details about its structure and properties are less published by the scientific literature, but all this are subject of a carefully analysis of the producers. Breaking of dental implants during surgical procedures, during the prosthetic procedures or during use (chewing, bruxism, accidents, etc.), is the second most common cause of loss of an implant after consecutive peri-implantitis rejection. Although the frequency of this type of failure for a dental implant is much smaller than those caused by the peri-implantitis, a detailed study of broken implants can explain possible causes. The use of scanning electron microscopy (SEM) in the study of the cleave areas explain the production mechanism of cleavages, starting from micro-fissures in the alloy used for the production of dental implants. These micro-fissures in weak areas of the implant (anti-rotational corners of the polygons, etc.) could generate a serious risk of cleavage first time when a higher force is applied.

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.

scholarly journals A first comprehensive inventory of Ascalaphidae, Palparidae, and Myrmeleontidae (Insecta: Neuroptera) of Northeastern Nigeria with description of two new species and an overview of genus Bankisus Navás

2021 ◽  
Vol 43 (5) ◽  
pp. 51-77
Author(s):  
André Prost ◽  
Alexi Popov
Keyword(s):  
Democratic Republic ◽  
New Records ◽  
National Museum ◽  
Museum Collections ◽  
Large Collection ◽  
Two New Species ◽  
Republic Of The Congo ◽  
Plateau State ◽  
New Synonymy ◽  
First Time

Investigation of a large collection of Neuroptera from Northeastern Nigeria stored untouched in alcohol for four decades in the National Museum of Natural History, Sofia, provided the opportunity to examine unpublished specimens and conduct a thorough review of published literature, establishing the first comprehensive inventory of Ascalaphidae, Palparidae, and Myrmeleontidae of Northeastern Nigeria to date. Specimens had been collected between 1976 and 1978 in Northeastern Nigeria, mostly in Jos City and Plateau State. Five species of Ascalaphidae, four of Palparidae, and 26 of Myrmeleontidae were identified. Bankisus beroni sp. n. and Creoleon nigrithorax sp. n. are described. Gymnoleon gaillardi is not considered a synonym of Gymnoleon exilis and a new synonymy is established: Gymnoleon externus (Navás, 1911) (= Gymnoleon gaillardi Navás, 1912, syn. n.). An examination of unpublished specimens in museum collections and an exhaustive literature review were conducted in order to draw up a comprehensive inventory of the fauna of Northeastern Nigeria, which to date comprises 11 species of Ascalaphidae, 12 species of Palparidae, and 34 species of Myrmeleontidae, of which one species of Ascalaphidae, two species of Palparidae, and 16 species of Myrmeleontidae, as well as the genera Brevibarbis, Bankisus, and Capicua, had not been reported to occur in Nigeria. The chorological information on the genus Bankisus is reviewed, the ranges of the species are critically discussed and corrected, and all known localities are indicated on a map. Bankisus oculatus is reported for the first time from the Democratic Republic of the Congo. The first recording of Centroclisis lineatipennis in West Africa is reported. Palpares cataractae and Palpares radiatus are deleted from the list of Nigerian fauna. With these new records, the known ranges of eight species are extended by more than 1400 km. In the process of assessing the geographical distribution of species present in Northeastern Nigeria, six species, as well as the genera Myrmecaelurus and Cueta and the tribe Nesoleontini, are reported for the first time from Burkina Faso.

scholarly journals The growth of interest for astronomical X-ray polarimetry

2018 ◽  
Author(s):  
Frédéric Marin
Keyword(s):  
Quantitative Assessment ◽  
Supernova Remnant ◽  
Scientific Literature ◽  
High Energy ◽  
X Ray ◽  
Highly Sensitive ◽  
In The Beginning ◽  
First Time

Astronomical X-ray polarimetry was first explored in the end of the 60's by pioneering rocket instruments. The craze arising from the first discoveries on stellar and supernova remnant X-ray polarization led to the addition of X-ray polarimeters on-board of early satellites. Unfortunately, the inadequacy of the diffraction and scattering technologies required to measure polarization with respect to the constraints driven by X-ray mirrors and detectors, coupled to long integration times, slowed down the field for almost 40 years. Thanks to the development of new, highly sensitive, compact X-ray polarimeters in the beginning of the 2000's, the possibility to observe astronomical X-ray polarization is rising again and scientists are now ready to explore the high energy sky thanks to modern X-ray polarimeters. In the forthcoming years, several X-ray missions (both rockets, balloons and satellites) will open a new observational windows. A wind of renewal blows over the area of X-ray polarimetry and this paper presents for the first time a quantitative assessment, all based on scientific literature, of the growth of interest for astronomical X-ray polarimetry.

scholarly journals CONSENSUAL GAMES IN NETWORK WARS AND THE IMPLANT PHENOMENON

2020 ◽  
Vol 4 (4) ◽  
pp. 393-399
Author(s):  
E.V. Bakshutova
Keyword(s):  
Social Network ◽  
Scientific Literature ◽  
Social Issues ◽  
Online Discussions ◽  
Expert Assessment ◽  
Research Experience ◽  
The Social ◽  
Russian President ◽  
First Time ◽  
Medicine Education

This article summarizes the author's research experience in 2018-2020 on the possibility of script implantation in online discussions of an aggressive nature to prevent their destructive impact on personality and social consent. At this stage, script implantation is conceptualized by us as network peacekeeping to reduce the level of aggression in communications. The work analyzes how peacemaking is presented in scientific literature of various directions - military, philosophical, political science, conflictological, and it is revealed that the psychological aspects of peacekeeping are of increasing interest, since the practice of peacekeeping is fraught with many problems. Moreover, the practice of network peacemaking as work with language and group sociocognitive psychology is offered for the first time. The study was conducted in 2018-2020 in the Russian-speaking sector of the social network Facebook. It is shown that the analysis of 5022 comments in 2018, 2458 - in 2019, 3139 - in 2020 allows identifying such trigger topics of online discussions as “It is good or bad to be Russian”, “President of Russia”, “Ukraine”, “Protests”. Social issues: the problems of pensioners, childhood, medicine, education - are discussed, but with less intensity. Summarizing the experience of search experiments, the author shows in which categories and subcategories such phenomena as collective fears, resentment, aggression, separatism and terrorism are represented. Work on creating script templates for networked peacekeeping is noted. An expert assessment of the selected texts allows us to assert that the management of triggered discussions is possible. The research is financially supported by the Russian Foundation for Humanities, project no. 18-013-00171 А.

scholarly journals New records of Odocoileus virginianus Zimmermann 1780 (Artiodactyla: Cervidae) from northern Brazil

2020 ◽  
Vol 6 (2) ◽  
pp. 168 ◽  
Author(s):  
Fernando Araujo Perini ◽  
Júlia Quintaneiro Mota
Keyword(s):  
Odocoileus Virginianus ◽  
Geographical Distribution ◽  
Geographic Distribution ◽  
New Records ◽  
First Record ◽  
Museum Collections ◽  
Ecological Data ◽  
Northern Brazil ◽  
Scientific Collections ◽  
First Time

We report new records of the White-Tailed Deer (Odocoileus virginianus) in Brazil based on specimens deposited in scientific collections. These new records expand the known geographic distribution of the species in Brazil southwards in the states of Roraima and Amapá, the latter the first record of the species below the equator line in Brazil, and register it for the first time in the state of Amazonas. These records contribute to increase the knowledge of the geographical distribution of O. virginianus in Brazil and highlights the importance of museum collections as a source of biogeographic and ecological data.

Structural, chemical and spectroscopic re-examination of type uklonskovite leads to its redefinition

2017 ◽  
Vol 81 (6) ◽  
pp. 1397-1404 ◽  
Author(s):  
S. Menchetti ◽  
L. Bindi ◽  
D. Belakovskiy ◽  
F. Zaccarini
Keyword(s):  
Crystal Structure ◽  
Scientific Literature ◽  
Careful Analysis ◽  
Chemical Formula ◽  
International Mineralogical Association ◽  
Mineralogical Association ◽  
Structural Details ◽  
First Time ◽  
Shed Light

AbstractThe crystal structure and the chemical composition of uklonskovite from the holotype material was reinvestigated to shed light on its correct chemical formula. On the basis of information gained from this characterization, we revised the formula from NaMg(SO4)OH·2H2O to NaMg(SO4)F·2H2O (F instead of OH). A careful analysis of the structural details together with a critical review of all the chemical data listed in the scientific literature for uklonskovite support our redefinition. We also present Raman data for the mineral for the first time. Our proposal was approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (voting proposal 16-J).

scholarly journals A Multidisciplinary Review of the Roles of Cripto in the Scientific Literature Through a Bibliometric Analysis of its Biological Roles

Cancers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1480
Author(s):  
Elisa Rodrigues Sousa ◽  
Eugenio Zoni ◽  
Sofia Karkampouna ◽  
Federico La Manna ◽  
Peter C. Gray ◽  
...  
Keyword(s):  
Bibliometric Analysis ◽  
Scientific Literature ◽  
Stem Cell Differentiation ◽  
Tissue Growth ◽  
Growth And Remodeling ◽  
Comprehensive Overview ◽  
Critical Knowledge ◽  
Physiological Processes ◽  
First Time ◽  
Glucose Regulated Protein

Cripto is a small glycosylphosphatidylinisitol (GPI)-anchored and secreted oncofetal protein that plays important roles in regulating normal physiological processes, including stem cell differentiation, embryonal development, and tissue growth and remodeling, as well as pathological processes such as tumor initiation and progression. Cripto functions as a co-receptor for TGF-β ligands such as Nodal, GDF1, and GDF3. Soluble and secreted forms of Cripto also exhibit growth factor-like activity and activate SRC/MAPK/PI3K/AKT pathways. Glucose-Regulated Protein 78 kDa (GRP78) binds Cripto at the cell surface and has been shown to be required for Cripto signaling via both TGF-β and SRC/MAPK/PI3K/AKT pathways. To provide a comprehensive overview of the scientific literature related to Cripto, we performed, for the first time, a bibliometric analysis of the biological roles of Cripto as reported in the scientific literature covering the last 10 years. We present different fields of knowledge in comprehensive areas of research on Cripto, ranging from basic to translational research, using a keyword-driven approach. Our ultimate aim is to aid the scientific community in conducting targeted research by identifying areas where research has been conducted so far and, perhaps more importantly, where critical knowledge is still missing.

How it happened that a portion of a treatise entitled New Improvements of Planting and Gardening both Philosophical and Practical by Richard Bradley FRS, which dealt with blights of trees and plants, provided the first report of an environment that contained green sulphur photosynthetic bacteria

2007 ◽  
Vol 61 (3) ◽  
pp. 327-332 ◽  
Author(s):  
Melvin Santer
Keyword(s):  
Infectious Disease ◽  
Photosynthetic Bacteria ◽  
Scientific Literature ◽  
Enrichment Culture ◽  
Carbon Dioxide Gas ◽  
Green Sulphur ◽  
Anoxic Environment ◽  
First Time ◽  
Transmit Disease ◽  
Natural Enrichment

Richard Bradley proposed that biological agents caused infectious disease. He agreed that air could transmit disease, but it had to contain a living agent, either visible or microscopic. To dismiss the idea that air alone could cause disease he included evidence provided by Robert Balle about a toxic grotto near Lake Averna, close to Naples, whose fumes were lethal to animals and humans yet that lethality was not contagious and occurred quickly, not a characteristic of ‘pestilential fevers’. In this grotto the surface water was covered with a ‘green scum’, a layer of green sulphur photosynthetic bacteria that could live in that anoxic environment, which contained hydrogen sulphide and carbon dioxide gas and was accessible to visible light. This environment was a natural enrichment culture for these bacteria. It was the first time that the presence of these bacteria was disclosed in the scientific literature.

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