Results 1 to 10 of about 22,376,002 (349)

HUBUNGAN PENGGUNAAN SMARTPHONE DAN KESIAPAN BELAJAR DENGAN HASIL BELAJAR MATEMATIKA

open access: yesAksioma: Jurnal Program Studi Pendidikan Matematika, 2021
Abstrak Masalah dalam penelitian ini adalah rendahnya hasil belajar matematika. Tujuan penelitian ini untuk  mengetahui hubungan yang signifikan antara penggunaan smartphone dengan kesiapan belajar, penggunaan smartphone dengan hasil belajar matematika,
Nelly Astuti   +4 more
doaj   +1 more source

Schiff base-mediated base pairing [PDF]

open access: yesNucleic Acids Symposium Series, 2005
We here present a novel covalently linked base pair via Schiff base formation between 5-formyluracil (fU) and 5-aminocytosine (AmC). The formation of Schiff base remarkably increases thermal stability of the duplex DNA, whereas it completely dissociates upon heating at 90 degrees C. Neither AmC nor fU produces covalent linkage with other natural bases,
Chikara, Dohno   +2 more
openaire   +2 more sources

Coulometric titrations of bases in propylene carbonate and γ-butyrolactone using hydroquinone as the depolarizer and a quinhydrone indicator electrode [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
The application of hydroquinone for the coulometric generation of hydrogen ions in propylene carbonate (PC) and γ-butyrolactone (GBL) is described.
Jakšić Lj.N.   +3 more
doaj   +1 more source

Making Operation-Based CRDTs Operation-Based [PDF]

open access: yesProceedings of the First Workshop on Principles and Practice of Eventual Consistency, 2014
Conflict-free Replicated Datatypes (CRDT) are usually classified as either state-based or operation-based. However, the standard definition of op-based CRDTs is very encompassing, allowing even sending the full-state, blurring the distinction. We introduce pure op-based CRDTs, that can only send operations to other replicas, drawing a clear distinction
Baquero, Carlos   +2 more
openaire   +4 more sources

METHODS OF THE FORECAST OF SAFE WORK OF A ROAD BED OF THE HIGHWAY

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2016
Methods of the forecast of the parameter of the safe work earth are brought In article onpallet, as which is accepted reliability of the work for period between heavy repairs at reasonable conditions of the usages. Reliability is Considered as estimation
M. O. Allaev
doaj   +1 more source

Analysis of main points of channel freezing-thawing disease in cold region and influence of channel base soil on the disease [PDF]

open access: yesE3S Web of Conferences, 2021
The frozen soil area in China is more than two thirds of the total territory, so the problem of frost heave is obvious. Especially in northeast, northwest, north China and other cold regions, the problem of frost heave of hydraulic structures is very ...
Liang Liqing
doaj   +1 more source

Acid-Base Titration

open access: yesUndergraduate Journal of Mathematical Modeling: One + Two, 2019
Titration is an analytical method used in biomedical sciences and analytical chemistry laboratories to determine the quantity or the concentration of a known or unknown substance.
David Pierre
doaj   +1 more source

An Efficient Synthesis of Arylated Pyridines from Conjugated Acetylenes and Substituted Benzylamines Catalyzed by Base

open access: yesMolecules, 2017
An efficient base-catalyzed synthesis of arylated pyridines has been disclosed. This reaction involving conjugated acetylenes and substituted benzylamines proceeded smoothly, giving rise to tri-aryl substituted pyridines which are biologically relevant ...
Mengping Guo   +5 more
doaj   +1 more source

Evaluation of Existing Models to Estimate Sorption Coefficients for Ionisable Pharmaceuticals in Soils and Sludge

open access: yesToxics, 2020
In order to assess the environmental risk of a pharmaceutical, information is needed on the sorption of the compound to solids. Here we use a high-quality database of measured sorption coefficients, all determined following internationally recognised ...
Laura J. Carter   +2 more
doaj   +1 more source

EXTRACTO DEL MAÍZ MORADO COMO INDICADOR QUÍMICO

open access: yesChakiñan, 2019
La presente investigación propone la extracción de las antocianinas presentes en el maíz morado y su utilización en la identificación cualitativa del carácter ácido, neutro y/o básico de variadas sustancias de la vida cotidiana.
Elena Patricia Urquizo Cruz   +1 more
doaj   +1 more source

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