Results 11 to 20 of about 322 (154)

Copper-Catalyzed C(3+1) copolymerization of propargyl carbonates and aryldiazomethanes

open access: yesGiant, 2023
Controlling the composition and sequence during diazo copolymerization with vinyl or acetylenic monomers is highly desired yet challenging. Here we report a new base-metal-catalysis strategy to address this problem via tandem coupling/polymerization.
Hao-Ze Su, Bin Wu, Jianbo Wang, Rong Zhu
doaj   +1 more source

The effect of size and productivity on borrowing discouragement for small firms in Colombia

open access: yesLatin American Journal of Central Banking, 2022
I estimate the effect micro firms’ size and productivity have on the probability of becoming a discouraged borrower: firms that do not use credit from the formal financial system despite needing it.
Oscar Jaulín-Méndez
doaj   +1 more source

Perfil de n-alcanos em cinco espécies de plantas forrageiras tropicais - DOI: 10.4025/actascianimsci.v27i3.1207

open access: yesActa Scientiarum: Animal Sciences, 2008
O objetivo do experimento foi estudar o perfil de n-alcanos em espécies de gramíneas (Brachiaria brizantha, Cynodon dactylon e Panicum maximum) e leguminosas (Arachis pintoi e Glycine wightii).
Cristiano Côrtes   +5 more
doaj   +1 more source

Tribological behavior of as-cast and wrought Al–Mg2Si hybrid composites reinforced by Ti-based intermetallics

open access: yesJournal of Materials Research and Technology, 2022
In this study, the tribological properties of Al–15Mg2Si (AC), Al–15Mg2Si–3TiB2–TiAl3 (C31), and Al–15Mg2Si–5TiB2–4TiAl3 (C54) in-situ composites were evaluated.
Mohammad Rasool Moazami   +4 more
doaj   +1 more source

Synthesis of C7−C31 fragment of (−)-cryptocaryol A [PDF]

open access: yesProceedings of the 15th Brazilian Meeting on Organic Synthesis Proceedings, 2013
The aqueous Barbier reaction between glyoxal (3) and allyl bromide (97%), followed by an oxidative cleavage by NaIO4, provided aldehyde 4 (Scheme 1). The protection of alcohol 5 with PMBtrichloroacetimidate (PMB-TCA), followed by a Wacker oxidation, led to the formation of methylketone 6 in 53% yield for 2 steps. The aldehyde 8 was prepared under Swern
Paula K. Kuroishi   +2 more
openaire   +1 more source

The Spatial Fay-Herriot Model in Poverty Estimation

open access: yesFolia Oeconomica Stetinensia, 2016
Counteracting poverty is one of the objectives of the European Commission clearly emphasized in the Europe 2020 strategy. Conducting appropriate social policy requires knowledge of the extent of this phenomenon.
Wawrowski Łukasz
doaj   +1 more source

Correlation between profitability and transfer activity in European football

open access: yesCroatian Review of Economic, Business and Social Statistics, 2018
The transfer market of European football can be classified as a system. In this system, the effectiveness of participant teams can depend on the activity in players’ transfers.
Fürész Diána Ivett
doaj   +1 more source

Estimation of Fixed Capital Investment in SMEs: the Existing Differentiation in the Russian Federation

open access: yesBusiness Systems Research, 2018
Background: One of the goals of Russia economy is to increase SMEs specific weight in GDP per 100% by 2030.
Pinkovetskaia Iuliia, Slepova Vladislava
doaj   +1 more source

Impacto del uso de energía y formación bruta de capital en el crecimiento económico. Un análisis de datos de panel en 73 países agrupados por nivel de ingreso y producción de petróleo

open access: yesEl Trimestre Económico, 2018
Introducción: Esta investigación examina la relación entre el uso de energía (UEN) y la formación bruta de capital (FBC) fijo con la tasa de crecimiento del producto interno bruto (PIB) en 73 países.
Héctor F. Salazar-Núñez   +1 more
doaj   +1 more source

Regression Analysis of Influencing Factors of Public Education in Hungary

open access: yesActa Universitatis Sapientiae: Economics and Business, 2016
The education system in Hungary has been greatly criticized in the last decades regarding the standards and quality of education and its ignorance towards labour market demands. The present study focuses on factors affecting the quality of education. The
Vér Gáspár Katalin   +2 more
doaj   +1 more source

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