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Aluminum - ToxFAQs : CAS#: 7429-90-5 [Korean]
No full textAluminum : CAS#: 7429-90-5 [Korean]CS249955-Dtfacts22_korean.pd
Aluminum : CAS#: 7429-90-5 [Arabic]
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Aluminum : CAS#: 7429-90-5 [Chinese]
No full textAluminum : CAS#: 7429-90-5 [Chinese]CS249955-Dtfacts22_chinese.pd
Aluminum : CAS#: 7429-90-5 [Arabic]
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Synthesis of a New Glycoconjugate with Di-ᴅ-Psicose Anhydride Structure
No full textDemand for healthy diets has led researchers to explore new saccharide as sucrose alternatives. ᴅ-Psicose, the C-3 epimer of ᴅ-fructose, has a similar sweetness intensity to sucrose but contributes fewer calories. This study proposes a disaccharide with a stable structure derived from ᴅ-psicose. The compound with a spiro-tricyclic core was generated at 32% conversion via caramelization of ᴅ-psicose under acidic anhydrous conditions. The compound was identified by high-resolution mass spectrometry and multi-dimensional nuclear magnetic resonance (NMR). The molecular formula was established as C12H20O10 from the molecular weight of m/z 324.1055. Twelve signals were observed by the 13C NMR spectrum. This compound, denoted di-ᴅ-psicose anhydride (DPA), exhibited a lower water solubility (40 g/L) and higher thermal stability (peak temperature = 194.7 °C) than that of ᴅ-psicose (peak temperature = 126.5 °C). The quantitatively evaluated metal ion scavenging ability of DPA was the best in magnesium (average 98.6 ± 1.1%). This synthesis methodology can provide disaccharides with high stability-reducing heavy metals
Fine structure of anomalously intense pulses of PSR J0814+7429 radio emission in the decameter range
No full textПредмет и цель работы: Исследуется тонкая структура аномально интенсивных импульсов пульсара J0814+7429 (В0809+74). Изучение тонкой структуры радиоизлучения этого пульсара проводится с целью определения ее параметров в самой низкочастотной области спектра, доступной при наблюдениях с поверхности Земли. Методы и методология: С помощью спектрального и корреляционного анализа данных, зарегистрированных на радиотелескопе УТР-2, получаются оценки меры рассеяния в межзвездной плазме. Результаты: Обнаружено два характерных временных масштаба тонкой структуры аномально интенсивных импульсов пульсара J0814+7429. Установлено, что наиболее интенсивные импульсы, которые генерирует пульсар J0814+7429 в декаметровом диапазоне, могут иметь длительность порядка 2÷3 мс. Эти импульсы излучаются короткими сериями. В некоторых случаях они излучаются на фоне “длинной” субимпульсной компоненты, образующей низкоинтенсивное плато.Предмет і мета роботи: Вивчається тонка структура аномально інтенсивних імпульсів пульсара J0814+7429 (В0809+74). Дослідження тонкої структури радіовипромінювання цього пульсара виконуються з метою визначення її параметрів у найнижчому частотному діапазоні спектра, що є доступним для спостережень з поверхні Землі. Методи і методологія: За допомогою спектрального та кореляційного аналізу даних, зареєстрованих на радіотелескопі УТР-2, отримуються оцінки міри розсіяння у міжзоряній плазмі. Результати: Виявлено два характерних часових масштаби тонкої структури аномально інтенсивних імпульсів пульсара J0814+7429. Встановлено, що найінтенсивніші імпульси, які генерує пульсар J0814+7429 у декаметровому діапазоні, можуть мати тривалість близько 2 ÷3 мс. Ці імпульси випромінюються короткими серіями. В деяких випадках вони випромінюються на тлі “довгої” субімпульсної компоненти, що утворює низькоінтенсивне плато.Purpose: The fine structure of the anomalously intense pulses of PSR J0814+7429 (В0809+74) has been studied. The pulsar radio emission fine structure is investigated to determine its parameters in the lowest part of spectrum available for groundbased observations. Design/methodology/approach: The scattering measure in the interstellar plasma have been estimated using the spectral and correlation analyses of pulsar data recorded by the UTR-2 radio telescope. Results: Two characteristic time scales of the anomalously intense pulses fine structure of the PSR J0814+7429 radio emission have been found. The strongest pulses of this pulsar in the decameter range can have a duration of about t 2÷3 ms. These pulses are emitted in short series. In some cases, they are emitted over the low-intensity plateau consisting of the “long” subpulse component
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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