scholarly journals Design and Synthesis of Functional Silsesquioxane-Based Hybrids by Hydrolytic Condensation of Bulky Triethoxysilanes

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
Hideharu Mori
Keyword(s):  
Size Distribution ◽  
Water Soluble ◽  
Metal Alkoxides ◽  
Narrow Size Distribution ◽  
Stimuli Responsive ◽  
Design And Synthesis ◽  
One Step ◽  
The Subject ◽  
Characteristic Features ◽  
The One

This paper presents a short overview of recent advances in the design and synthesis of organic-inorganic hybrids using silsesquioxane-based nanoparticles having nanometer size, relatively narrow size distribution, high functionalities, and various characteristic features, mainly focusing on our recent researches related to the subject. A highlight of this paper is the water-soluble silsesquioxane-based nanoparticles, including hydroxyl-functionalized and cationic silsesquioxanes, which were synthesized via the one-step condensation of the bulky triethoxysilane precursors. The design and synthesis of R-SiO1.5/SiO2and R-SiO1.5/TiO2hybrids by hydrolytic cocondensation of a triethoxysilane precursor and metal alkoxides are briefly introduced. This paper also deals with recent results in stimuli-responsive hybrids based on the water-soluble silsesquioxane nanoparticles and fluorinated and amphiphilic silsesquioxane hybrids.

THE MODERN GREEK FAMILY: AXIOLOGICAL CONTRADICTIONS

2021 ◽  
pp. 43-52
Author(s):  
Anna A. Toropova ◽  
Keyword(s):  
Family Policy ◽  
Point Of View ◽  
Modern World ◽  
Traditional Values ◽  
Family Issues ◽  
The Family ◽  
The Subject ◽  
Family And Marriage ◽  
Characteristic Features ◽  
The One

Family issues and the topic of social family policy in Greece is the subject of researches by a number of Greek sociologists (V. Filias (Β. Φίλιας), G.-S. Prevelakis (Γ.-Σ. Πρεβελάκης), H. Simeonidou (Χ. Συμεωνίδου), G. Georgas (Γ. Γεωργάς), L. Musuru (Λ. Μουσούρου), L. Maratu-Aliprandi (Λ. Μαράτου-Αλιπράντη). It seems interesting and useful to consider the situation in Greece from the point of view of its ambivalent nature: traditional values and patriarchal order, on the one hand, and adherence to liberal European sentiments, on the other. In the modern world, there is a "reformatting of ideas about the essence of family and marriage" [Noskova A. V., 2017: 123], which leads, in particular, to the rejection of having children, to increasingly frequent divorces "for no reason", to irresponsibility in awareness roles in the family, to the vulnerability of socialization, to the infantilism of adults, to avoidance of awareness of problems of various kinds, to egocentrism. Modern Greece is not an exception. The growing number of single-parent families in cities, low birth rates, divorces, loneliness, depression are characteristic features of many families. This allows us to speak about the “crisis of the Greek family” [Γεωργάς, 2010]. This research may be of interest to specialists dealing with the topic of the family, and significantly supplement the existing research in the domestic sociological field.

scholarly journals Interpretation of acmeistic traditions in V. Shalamov’s poetry

2021 ◽  
Vol 61 ◽  
pp. 177-188
Author(s):  
Daria V. Krotova
Keyword(s):  
Internal State ◽  
The Other ◽  
Spiritual Experiences ◽  
Fundamental Significance ◽  
Inner World ◽  
The Subject ◽  
Characteristic Features ◽  
A Chain ◽  
The One ◽  
Different Levels

The paper examines the influence of acmeistic patterns on V. Shalamov-poet’s artistic consciousness. The study involves Shalamov’s epistolary and memoirs heritage (letters to N. Mandelstam, N. Stolyarova, essay “Akhmatova,” etc.), where the author reflected on the significance of acmeistic literary tradition, as well as put forward his own understanding of acmeism — not only as an artistic direction, but also as a kind of “life teaching,” a worldview system. One may trace the inheritance of acmeistic principles in Shalamov’s work at different levels. The paper seeks to identify and systematize acmeistic influences in poet’s consciousness. First of all, we are talking about the installation on the “fight for this world” (according to S. Gorodetsky): the multifaceted representation of the phenomena of environmental reality in its colors, forms and subject details. Shalamov inherits this principle, so that the objects of reality play a paramount role in his poetry system and receive no less distinct and large embodiment than in the work of acmeists. Such an arrangement is carried out by Shalamov in contrasting aspects: on the one hand, the imprinting of terrible world in which man barely survives and to which he seeks to resist; оn the other hand, even in the most adverse circumstances of imprisonment, the poet saw and felt the harmony and greatness of nature. The connection with the acmeistic thinking in Shalamov’s works is also expressed in the fact that his images are almost always substantive and tangible (this feature manifested itself as early as in the first poem of “Kolyma notebooks”). As in the lyrics of acmeists, he often refracted the inner world through external, spiritual experiences — through the prism of the subject plan (the principle that was realized brightly in the lyrics of A. Akhmatova). It is not often that the reader finds “pure” lyrical monologues, much more typical for Shalamov`s creative tactics — to characterize the internal state through a chain of real images. Acmeistic logic could be traced in the interpretation of a number of important topics, among which the theme of creativity (characteristic features of its interpretation are shown in the article on the example of poems “Ode to Loaf,” “May it be clumsily uneven…,” “By ungainly prisoner step...”). The paper addresses such a significant aspect (also linking the poet to the acmeistic tradition) as a bodily nature of the figurative world. Finally, important feature of acmeistic thinking, which is inherited by Shalamov, is the obvious appeal of his creativity to the interlocutor, the focus on the reader (this feature is immanent, certainly, not only in the consciousness of akmeists, but it has fundamental significance in their creativity). The study concludes that among the traditions influenced Shalamov-poet, the acmeist becomes one of the most important, most significant artistic and worldview guidelines.

Evaluation of the Synthetic Product

2002 ◽  
Author(s):  
Gregory A. Grant
Keyword(s):  
Peptide Synthesis ◽  
Solid Phase ◽  
Solid Phase Peptide Synthesis ◽  
Side Reactions ◽  
Design And Synthesis ◽  
Synthetic Product ◽  
One Step ◽  
Evaluation Stage ◽  
And Performance ◽  
The One

In 1987, an article appeared in the International Journal of Peptide and Protein Research commemorating the 25th anniversary of the development of solid phase peptide synthesis (Barany et al., 1987). While that article dealt with many aspects of peptide synthesis, one statement in particular stands out as exemplifying the rationale for this chapter. It states: “No synthetic endeavor can be considered complete until the product has been adequately purified and subjected to a battery of analytical tests to verify its structure.” The characterization or evaluation of a synthetic peptide is the one step in its production and experimental utilization that will validate the experimental data obtained. Unfortunately, it is also the one step that many investigators all too often give too little attention. If the synthetic product, upon which the theory and performance of the experimental investigation is based, is not the intended product, the conclusions will be incorrect. Without proper characterization, the investigator will either have to be lucky, or be wrong. Worse yet, he or she will not know which is the case. Although today the synthesis of a given peptide is often considered routine, the product should never be taken for granted. Peptide synthesis chemistry, although quite sophisticated, is complex and subject to a variety of problems. These problems, which can manifest themselves as unwanted side reactions and decreased reaction efficiency, are subject to a variety of factors such as reagent quality, incompatible chemistries, instrument malfunctions, sequence specific effects, and operator error. Although every effort is made to eliminate their causes and to plan for potential problems in the design and synthesis steps, it is not always successful and the eventual outcome of a synthesis is not always predictable. One must never assume that the final product is the expected one until that has been proven to be the case. To do otherwise may seriously jeopardize the outcome of the research. Used and performed properly, the evaluation stage is where the fruits of the synthesis are scrutinized and the decision is made to use the peptide as intended, submit it to further purification, or resynthesize it and possibly change elements of the design or synthesis protocols.

Simple hydrothermal preparation of carbon nanodots and their application in colorimetric and fluorimetric detection of mercury ions

2015 ◽  
Vol 7 (18) ◽  
pp. 7540-7547 ◽  
Author(s):  
Yan Liang ◽  
Hui Zhang ◽  
Yan Zhang ◽  
Fang Chen
Keyword(s):  
Quantum Yield ◽  
Green Synthesis ◽  
Water Soluble ◽  
Carbon Nanodots ◽  
Fluorimetric Detection ◽  
Mercury Ions ◽  
Hydrothermal Preparation ◽  
One Step ◽  
The One ◽  
Fluorescent Carbon Nanodots

The present article reports on the one-step rapid green synthesis of water-soluble, fluorescent carbon nanodots (C-dots) with a quantum yield of 8.9%.

Fabrication of Monodispersed 5-nm BaTiO3Nanocrystals with Narrow Size Distribution via One-Step Solvothermal Route

2011 ◽  
Vol 94 (10) ◽  
pp. 3220-3222 ◽  
Author(s):  
Hui Zhang ◽  
Xiaohui Wang ◽  
Zhibin Tian ◽  
Caifu Zhong ◽  
Yichi Zhang ◽  
...  
Keyword(s):  
Size Distribution ◽  
Narrow Size Distribution ◽  
Solvothermal Route ◽  
One Step

scholarly journals ALANO-OSSETIAN FYNGS AND NART EPOS

Kavkaz-forum ◽  
2020 ◽  
Author(s):  
А.А. ТУАЛЛАГОВ
Keyword(s):  
Research Methods ◽  
Precious Metals ◽  
Interdisciplinary Approach ◽  
Scientific Publications ◽  
Structural Details ◽  
Archaeological Materials ◽  
The Subject ◽  
Characteristic Features ◽  
The One ◽  
Textual Research

Статья посвящена анализу образа традиционного столика (фынг) в материалах Нартовского эпоса осетин. Актуальность рассматриваемой проблемы определяется наличием изданного обширного корпуса нартовских сказаний. Данное положение позволяет, с одной стороны, вывести в полном объеме характерные признаки данного объекта, а, с другой стороны, сопоставить их с данными археологии и этнографии. Научная новизна работы состоит в междисциплинарном подходе к исследованию, который обеспечивается, в том числе, впервые привлекаемыми к анализу материалами. Цель исследования состоит в выявлении волшебных и объективных конструктивных особенностей столиков как предметов быта в сопоставлении с реальными столиками алан и генетически связанными с ними столиками осетин. При проведении исследования применялись методы текстуального исследования источников, описательный, типологический и сравнительный методы исследования при фотофиксации изучаемых объектов, индуктивного и логического анализа на основе принципа историзма и системности изложения. В ходе исследования определилось наличие в эпосе двух видов представлений о предмете. Первый наделяет его волшебными свойствами самостоятельного передвижения и предоставления угощения при возможности повышения значимости предмета за счет приписывания ему изготовления из драгоценных металлов. Второй воспроизводит формы и конструктивные детали предмета, надежно сопоставимые с этнографическими и археологическими образцами. Возможно, отдельные из таких деталей послужили поводом к рождению представлений о некоторых волшебных способностях столика. Кроме того, археологические материалы предоставляют показательные примеры использования определенных типов древесины при изготовлении столов. Отмечаемые в научных изданиях попытки трактовать образ столика с мифологической позиции за счет символизма форм и чисел, представляется, как минимум, преждевременными. The article is devoted to the analysis of the image of the traditional table (fyng) in the materials of the Nart epic of the Ossetians. The relevance of the problem under consideration is determined by the existence of the published extensive corpus of the Narts’ sagas. This provision allows, on the one hand, to fully derive the characteristic features of this object, and, on the other hand, to compare them with the data of archeology and ethnography. The scientific novelty of the work consists in an interdisciplinary approach to research, which is provided, inter alia, by materials first brought to analysis. The purpose of the study is to identify the magical and objective design features of tables as household items in comparison with real Alanian tables and genetically related tables of the Ossetians. When conducting the research, methods of textual research of sources, descriptive, typological and comparative research methods were used for photographic fixation of the studied objects, inductive and logical analysis based on the principle of historicism and systematic presentation. The study determined the presence in the epos of two types of ideas about the subject. The first endows it with magical properties of independent movement and providing treats when it is possible to increase the significance of the subject by attributing to it the manufacture of precious metals. The second reproduces the forms and structural details of the subject, which are reliably comparable with ethnographic and archaeological samples. Perhaps some of these details gave rise to ideas about some of the table's magical abilities. In addition, archaeological materials provide illustrative examples of the use of certain types of wood in the manufacture of tables. The attempts to interpret the image of the table from a mythological position due to the symbolism of forms and numbers noted in scientific publications seem at least premature.

Determination of particle size distribution of water-soluble CdTe quantum dots by optical spectroscopy

RSC Advances ◽  
2014 ◽  
Vol 4 (68) ◽  
pp. 36024-36030 ◽  
Author(s):  
J. C. L. Sousa ◽  
M. G. Vivas ◽  
J. L. Ferrari ◽  
C. R. Mendonca ◽  
M. A. Schiavon
Keyword(s):  
Quantum Dots ◽  
Particle Size ◽  
Optical Properties ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Water Soluble ◽  
Cdte Quantum Dots ◽  
One Pot ◽  
The One

In the present study, we report the synthesis of glutathione (GSH) capped CdTe quantum dots (QDs) using the one-pot approach as well as their optical properties.

Organometallic synthesis of water-soluble ruthenium nanoparticles in the presence of sulfonated diphosphines and cyclodextrins

2014 ◽  
Vol 1675 ◽  
pp. 219-225
Author(s):  
Miguel Guerrero ◽  
Nguyet Trang Thanh Chau ◽  
Alain Roucoux ◽  
Audrey Nowicki-Denicourt ◽  
Eric Monflier ◽  
...  
Keyword(s):  
Size Distribution ◽  
Surface Properties ◽  
High Stability ◽  
Catalytic Properties ◽  
Water Soluble ◽  
Narrow Size Distribution ◽  
Ruthenium Nanoparticles ◽  
Organometallic Synthesis ◽  
Protective Agents

ABSTRACTThe organometallic approach was successfully applied to synthesize water-soluble ruthenium nanoparticles displaying interesting catalytic properties in hydrogenation of unsaturated model-substrates. Nanocatalyst synthesis was performed by hydrogenation of the complex [Ru(COD)(COT)] in the presence of sulfonated diphosphines and cyclodextrins as protective agents providing very small ruthenium nanoparticles (ca. 1.2-1.5 nm) with narrow size distribution and high stability. Catalysis results in water evidenced a control of the surface properties of these novel ruthenium nanocatalysts at a supramolecular level.

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