scholarly journals Direct Base-Assisted C‒H Cyclonickelation of 6-Phenyl-2,2′-bipyridine

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 997
Author(s):  
Nicolas Vogt ◽  
Vasily Sivchik ◽  
Aaron Sandleben ◽  
Gerald Hörner ◽  
Axel Klein
Keyword(s):  
Elevated Temperature ◽  
Title Compound ◽  
Noble Metals ◽  
Oxidative Addition ◽  
Base Metals ◽  
Base Pairs ◽  
Reaction Conditions ◽  
Wide Range ◽  
The World ◽  
First Time

The organonickel complexes [Ni(Phbpy)X] (X = Br, OAc, CN) were obtained for the first time in a direct base-assisted arene C(sp2)–H cyclometalation reaction from the rather unreactive precursor materials NiX2 and HPhbpy (6-phenyl-2,2′-bipyridine) or from the versatile precursor [Ni(HPhbpy)Br2]2. Different from previously necessary C‒Br oxidative addition at Ni(0), an extended scan of reaction conditions allowed quantitative access to the title compound from Ni(II) on synthetically useful timescales through base-assisted C‒H activation in nonpolar media at elevated temperature. Optimisation of the reaction conditions (various bases, solvents, methods) identified 1:2 mixtures of acetate and carbonate as unrivalled synergetic base pairs in the optimum protocol that holds promise as a readily usable and easily tuneable access to a wide range of direct nickelation products. While for the base-assisted C‒H metalation of the noble metals Ru, Ir, Rh, or Pd, this acetate/carbonate method has been established for a few years, our study represents the leap into the world of the base metals of the 3d series.

Wastewater treatment: new flotation models and flotation combines of the KBS type and special purpose

2021 ◽  
Author(s):  
Boris Ksenofontov
Keyword(s):  
Wastewater Treatment ◽  
Water Purification ◽  
World Literature ◽  
Flotation Process ◽  
University Teachers ◽  
Multi Stage ◽  
Wide Range ◽  
The World ◽  
First Time ◽  
Broad Aspect

In this monograph, for the first time in the world literature, the multi-stage and generalized flotation models proposed by the author more than thirty years ago are considered in a broad aspect. The possibilities of their use in various areas of flotation water purification, precipitation thickening and mineral processing are shown. Issues related to new flotation equipment in the form of flotation combines of the KBS type and special purpose, developed on the basis of multi-stage and generalized models of the flotation process, are widely covered. The prospects and ways of intensification of flotation processes of water purification are indicated. For a wide range of readers, including researchers, university teachers, postgraduates, masters, bachelors and undergraduates.

scholarly journals Iridium Catalyzed Synthesis of Tetrahydro-1H-Indoles by Dehydrogenative Condensation

Inorganics ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 97 ◽  
Author(s):  
Forberg ◽  
Kallmeier ◽  
Kempe
Keyword(s):  
Title Compound ◽  
Secondary Alcohols ◽  
Pd Catalyst ◽  
Pincer Ligand ◽  
Reaction Conditions ◽  
Iridium Catalyst ◽  
Synthetic Procedure ◽  
Reaction Proceeds ◽  
Synthetic Routes ◽  
First Time

Novel synthetic routes to the commonly encountered indole motif are highly sought after. Tetrahydro-1H-indoles were synthesized for the first time from secondary alcohols and 2aminocyclohexanol in the presence of a well-established iridium catalyst using a modified synthetic procedure recently developed for the synthesis of hydrocarbazoles. The catalyst is stabilized by an inexpensive and easy-to-synthesize triazine based PN5P pincer ligand. The reaction proceeds through acceptorless dehydrogenative condensation (ADC) and yields the title compound, dihydrogen, and water and can thus be classified as sustainable synthesis. Overall, five examples, three of which were previously unknown compounds, were prepared. The propitious isolated yields and the mild reaction conditions show the synthetic value of this approach. These tetrahydroindoles can be quantitatively dehydrogenated over a heterogeneous Pd catalyst to yield the corresponding indoles.

scholarly journals The Snake and Its Chthonic Essence in Traditional Beliefs, Language and Folklore of the Khakass

2021 ◽  
Vol 20 (5) ◽  
pp. 142-153
Author(s):  
Venariy A. Burnakov
Keyword(s):  
Ritual Practice ◽  
Lexical Analysis ◽  
Traditional Beliefs ◽  
Natural Objects ◽  
Wide Range ◽  
The World ◽  
The Dead ◽  
Characteristic Features ◽  
First Time ◽  
Biological Nature

Purpose. The aim of the study is to characterize the image of the snake as a chthonic creature in Khakass culture. Based on the goal, the following tasks were set: to analyze folklore and ethnographic information of these people and identify the key components of this mythological creature, to discover the semantic connections of its image with natural objects and elements, as well as with the idea of death. The work is based on the analysis of a wide range of sources. For the first time, it introduces field ethnographic and archival folklore materials, as well as author translations from Khakas into Russian of excerpts from heroic legends – alyptyg nymykhtar, proverbs and sayings related to the topic under consideration. Particular attention is paid to the lexical analysis of the myth-ritual complex related to the image of the snake. Results. As a result of the analysis, the following conclusions can be drawn: 1) the image of a snake was widespread in Khakass culture. This reptile was endowed with sacred attributes. In this connection, its image was widely used in language, folklore, and ritual practice; 2) the formation of characteristic features of the mythological image of this reptile was influenced by its biological nature, first of all, the morphology of its body, behavior, lifestyle, way of hunting, and, of course – the environment; 3) with all the variety of symbolic characteristics of this reptile, the key is its perception, as a chthonic creature. It was closely associated with the cult of natural objects, in particular with respect for the land. Its deep connection with the underworld is revealed; 4) in religious and mythological consciousness of the Khakass, this reptile acts as an inhabitant of the world of the dead, and is also a harbinger of death, and often its personification; 5) in mythological consciousness, the projection of its zoological features was expressed mainly in endowing its image with features such as agility, cunningness and greed, which was reflected in phraseological units.

Shakespeare's Existentials

2021 ◽  
Author(s):  
Pavel Gorohov
Keyword(s):  
Human Life ◽  
History Of Philosophy ◽  
Close Connection ◽  
Philosophical Literature ◽  
Space And Time ◽  
Wide Range ◽  
The World ◽  
History Of ◽  
First Time

For the first time in the Russian historical and philosophical literature, the monograph attempts to comprehensively consider the philosophical views of the great playwright and thinker. Shakespeare is presented as a philosopher who considered in his masterpieces the relation of man to the world through a series of"borderline situations". Shakespeare not only anticipated the existentialist philosophers, but also appeared in his work as the greatest philosopher-anthropologist. He reflects on the essence of nature, space and time only in close connection with thoughts about human life. For a wide range of readers interested in the history of philosophy and Shakespeare studies.

scholarly journals Distribution and Host Preference of Poroid Basidiomycetes in Hungary I. – Ganoderma

2013 ◽  
Vol 9 (1) ◽  
pp. 71-83
Author(s):  
Viktor Papp ◽  
Ilona Szabó
Keyword(s):  
Tree Species ◽  
Rare Species ◽  
Host Preference ◽  
Morphological Characters ◽  
Point Of View ◽  
Wide Range ◽  
The World ◽  
New Localities ◽  
Herbarium Collections ◽  
First Time

Abstract From the economical point of view, the genus Ganoderma is one of the most important groups of Basidiomycetes due to their medicinal effects and also because they cause decay in a very wide range of tree species all over the world. In this study new data of the Hungarian Ganoderma species are published and the specimens in accessible Hungarian herbarium collections are processed and revised. The article includes the nomenclatural status, the morphological characters, the host preference, frequencies and the details of the fungarium samples of six Ganoderma species (Ganoderma adspersum, G. applanatum, G. carnosum, G. cupreolaccatum, G. lucidum, G. resinaceum) as well. In total 215 Ganoderma specimens are examined and 10 hosts of the six native Ganoderma species new for Hungary are presented. The Hungarian locality and time of the collection of the only Ganoderma carnosum (IZ3122) specimen and two new localities of this rare species is published here for the first time.

scholarly journals SPORTS NEOLOGISMS AS A MEANS OF OBJECTIFYING THE UNIVERSAL IN THE GERMAN LANGUAGE WORLD PICTURE

2021 ◽  
Vol 10 (34) ◽  
Author(s):  
Y.M SHEMCHUK ◽  
Keyword(s):  
Word Formation ◽  
Practical Significance ◽  
German Language ◽  
Cognitive Approach ◽  
World Picture ◽  
Wide Range ◽  
The World ◽  
Definition Of ◽  
Different Cultures ◽  
First Time

Objective of the article: to consider sports neologisms as a means of objectifying the universal in the German language world picture. The introduction provides a definition of sports neologisms. This paper analyzes them based on data from the portal of the German language Institute in Mannheim www.owid.de. The novelty of the research is that for the first time the universal in the German language picture of the world is represented by sports neologisms that have great research potential and practical significance for a wide range of people interested in sports problems. The methodological basis of this research is primarily the cognitive approach as the main one and the semasiological approach as the accompanying one. The relevance of the research is due to the wide spread of sports in all countries of the world, which means the appearance in recent years of works that consider sports lexemes on the material of various languages. Results: the analysis of German sports neologisms showed that the vast majority of lexemes are words of English origin, which indicates the lexical way of combining different cultures. Sports neologisms that have emerged based on existing word-formation models in German or by reinterpreting existing lexemes also do not reflect the national mentality in the nominative system of the native language. Prospects for further study of German sports neologisms in various aspects: typological, metalanguage, and normative are offered.

scholarly journals Design and Build Flotocombines and Water Combines Based on the Principle of Biosimile

2022 ◽  
Vol 07 (01) ◽  
Author(s):  
Ksenofontov B.S. ◽  
Keyword(s):  
Graduate Students ◽  
World Literature ◽  
University Professors ◽  
Multi Stage ◽  
Wide Range ◽  
The World ◽  
First Time ◽  
Senior Students ◽  
Theoretical Foundations ◽  
Practical Recommendations

In the article offered to the attention of readers, for the first time in the world literature, both the theoretical foundations for creating flotocombines based on a multi-stage and generalized flotation model are considered, and practical recommendations based on the principles of biosimile. Possible schemes of flotocombines of the KBS type and special purpose are shown. New aeration systems for use in various flotation apparatus, including flotocombines, are considered. Practical examples of the use of new flotation equipment are described. It is offered to a wide range of readers, including researchers, university professors, graduate students, masters, bachelors and senior students.

scholarly journals First record of Xiphinema hunaniense Wang & Wu, 1992 (Dorylaimida: Longidoridae) associated with tea (Camellia sinensis (L.) Kuntze) in Thanh Hoa, Vietnam

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Le Thi Mai Linh ◽  
Nguyen Huu Tien ◽  
Nguyen Thi Duyen ◽  
Trinh Quang Phap
Keyword(s):  
Camellia Sinensis ◽  
18S Rdna ◽  
Phylogenetic Trees ◽  
First Record ◽  
Cultivated Plants ◽  
Wide Range ◽  
The World ◽  
First Time ◽  
Ectoparasitic Nematodes ◽  
18S Rdna Sequence

The dagger nematodes, Xiphinema spp., are migratory root-ectoparasitic nematodes that cause damage to a wide range of wild and cultivated plants over the world. In Vietnam, this nematode group has been studied mainly based on morphological characterizations. During a survey of pathogens associated with tea, a plant with many medicinal and therapeutic potentials, a population of Xiphinema hunaniense was recorded. This study provides the first morphological and molecular characterizations of Xiphinema hunaniense found on Tea in Vietnam. The 28S rDNA, and 18S rDNA phylogenetic trees of the genus Xiphinema are also provided. 18S rDNA sequence of X. hunaniense is also submitted to GenBank for the first time. 

scholarly journals A visit to Biotopia: genre, genetics and gardening in the early twentieth century

2018 ◽  
Vol 51 (3) ◽  
pp. 423-455 ◽  
Author(s):  
JIM ENDERSBY
Keyword(s):  
Twentieth Century ◽  
Natural World ◽  
Gendered Violence ◽  
Historical Significance ◽  
Scientific World ◽  
Mutation Theory ◽  
Wide Range ◽  
The World ◽  
The Usa ◽  
First Time

AbstractThe early decades of the twentieth century were marked by widespread optimism about biology and its ability to improve the world. A major catalyst for this enthusiasm was new theories about inheritance and evolution (particularly Hugo de Vries's mutation theory and Mendel's newly rediscovered ideas). In Britain and the USA particularly, an astonishingly diverse variety of writers (from elite scientists to journalists and writers of fiction) took up the task of interpreting these new biological ideas, using a wide range of genres to help their fellow citizens make sense of biology's promise. From these miscellaneous writings a new and distinctive kind of utopianism emerged – the biotopia. Biotopias offered the dream of a perfect, post-natural world, or the nightmare of violated nature (often in the same text), but above all they conveyed a sense that biology was – for the first time – offering humanity unprecedented control over life. Biotopias often visualized the world as a garden perfected for human use, but this vision was tinged with gendered violence, as it became clear that realizing it entailed dispossessing, or even killing, ‘Mother Nature’. Biotopian themes are apparent in journalism, scientific reports and even textbooks, and these non-fiction sources shared many characteristics with intentionally prophetic or utopian fictions. Biotopian themes can be traced back and forth across the porous boundaries between popular and elite writing, showing how biology came to function as public culture. This analysis reveals not only how the historical significance of science is invariably determined outside the scientific world, but also that the ways in which biology was debated during this period continue to characterize today's debates over new biological breakthroughs.

scholarly journals Bayburt Florasına Katkılar: Cichorieae (Asteraceae)

2019 ◽  
Vol 7 (3) ◽  
pp. 498
Author(s):  
Murat Erdem Güzel ◽  
Mutlu Gültepe ◽  
Serdar Makbul ◽  
İsa Bozkır ◽  
Kamil Coşkunçelebi
Keyword(s):  
Plant Diversity ◽  
Folk Medicine ◽  
Field Trips ◽  
Flora Of Turkey ◽  
Aegean Islands ◽  
Wide Range ◽  
The Family ◽  
The World ◽  
University Department ◽  
First Time

The Cichorieae Lam. & DC. is a tribe classified under the family Asteraceae. General characteristics of the tribe are milky latex and homogamous capitula with 5-dentate, ligulate flowers, makes the members easy to identify. The tribe compromise economically important genera Lactuca L. (Marul in Turkish), Scorzonera L. (Tekesakalı in Turkish) and Tragopogon L. (Yemlik in Turkish). The members of these genera are being use as folk medicine in Anatolia and all over the world as well. Bayburt Province settles between Soğanlı, Otlukbeli, Mescit and Giresun Maountains Range. Phytogeographically, Bayburt is included steppe area of the Irano-Turanian region and North tip of the Anatolian Diagonal. Bayburt homes to wide range plant diversity due to these phytogeographical characteristics. We aimed to contribute plant diversity of this city based on the samples collected from Bayburt during the field trips about the project on Cicerbita Wallr., Lactuca, Scorzonera, Tragopogon and Prenanthes L. in 2010-2017 and stored in the Herbarium of the Department of Biology at Karadeniz Technical University (KTUB) and Recep Tayyip Erdoğan University Department of Biology (RUB). Localities were plotted in a Bayburt map by using QGIS PC programme. According to Flora of Turkey and East Aegean Islands there are 4 taxa belong to Lactuca and 7 taxa belong to Scorzonera taxa in Bayburt, but there is no any record for Tragopogon. In the present paper, we recorded 24 (5 taxa of Lactuca, 14 taxa of Scorzonera and 5 taxa of Tragopogon) taxa from Bayburt, 6 of them endemic to Turkey. Consequently 13 taxa were reported from Bayburt for the first time.

Sign in / Sign up

Export Citation Format

Share Document