Search results for "ATAL"

Joroisten Järvikylän kartanon maatalouden muuttuminen 1900-luvulla

2003

Room-Temperature Magnetic Bistability in a Salt of Organic Radical Ions

2021

International audience; Cocrystallization of 7,7′,8,8′-tetracyanoquinodimethane radical anion (TCNQ −•) and 3-methylpyridinium-1,2,3,5dithiadiazolyl radical cation (3-MepyDTDA +•) afforded isostructural acetonitrile (MeCN) or propionitrile (EtCN) solvates containing cofacial π dimers of homologous components. Loss of lattice solvent from the diamagnetic solvates above 366 K affords a high-temperature paramagnetic phase containing discrete TCNQ −• and weakly bound π dimers of 3-MepyDTDA +• , as evidenced by X-ray diffraction methods and magnetic susceptibility measurements. Below 268 K, a first-order phase transition occurs, leading to a low-temperature diamagnetic phase with TCNQ −• σ dimer…

Single-molecule magnet properties of a monometallic dysprosium pentalene complex

2018

The pentalene-ligated dysprosium complex [(η8-Pn†)Dy(Cp*)] (1Dy) (Pn† = [1,4-(iPr3Si)2C8H4]2−) and its magnetically dilute analogue are single-molecule magnets, with energy barriers of 245 cm−1. Whilst the [Cp*]− ligand in 1Dy provides a strong axial crystal field, the overall axiality of this system is attenuated by the unusual folded structure of the [Pn†]2− ligand. peerReviewed

Rare‐earth cyclobutadienyl sandwich complexes: Synthesis, structure and dynamic magnetic properties

2018

The potassium cyclobutadienyl [K2{η4‐C4(SiMe3)4}] (1) reacts with MCl3(THF)3.5 (M=Y, Dy) to give the first rare‐earth cyclobutadienyl complexes, that is, the complex anions [M{η4‐C4(SiMe3)4}{η4‐C4(SiMe3)3‐κ‐(CH2SiMe2}]2−, (2M), as their dipotassium salts. The tuck‐in alkyl ligand in 2M is thought to form through deprotonation of the “squarocene” complexes [M{η4‐C4(SiMe3)4}2]− by 1. Complex 2Dy is a single‐molecule magnet, but with prominent quantum tunneling. An anisotropy barrier of 323(22) cm−1 was determined for 2Dy in an applied field of 1 kOe, and magnetic hysteresis loops were observed up to 7 K. nonPeerReviewed

Immobilized Pd on magnetic nanoparticles bearing proline as a highly efficient and retrievable Suzuki–Miyaura catalyst in aqueous media

2015

A magnetically retrievable nanocatalyst was evaluated for amicrowave assisted Suzuki–Miyaura reaction in aqueous media.Excellent yields and conversions were obtained with low Pd loadings(down to 0.01 mol% Pd). It was stable up to 6 months in waterunder aerobic conditions and efficiency remained unaltered evenafter 7 repeated cycles. Refereed/Peer-reviewed

Badanie aktywności katalizatorów Ni-Al2O3 w procesie uwodornienia kwasu maleinowego

2016

Zbadano wpływ zawartości aluminium na aktywność katalizatorów Ni-Al2O3 w procesie uwodornienia kwasu maleinowego. Aktywność katalityczną mierzono metodą potencjometryczną. Najwyższą aktywność katalityczną wykazywał katalizator zawierający 1% mol. Al. Stwierdzono obniżenie aktywności badanych katalizatorów ze wzrostem temperatury procesu uwodornienia.

Comparison of machine learning and logistic regression as predictive models for adverse maternal and neonatal outcomes of preeclampsia: A retrospecti…

2022

IntroductionPreeclampsia, one of the leading causes of maternal and fetal morbidity and mortality, demands accurate predictive models for the lack of effective treatment. Predictive models based on machine learning algorithms demonstrate promising potential, while there is a controversial discussion about whether machine learning methods should be recommended preferably, compared to traditional statistical models.MethodsWe employed both logistic regression and six machine learning methods as binary predictive models for a dataset containing 733 women diagnosed with preeclampsia. Participants were grouped by four different pregnancy outcomes. After the imputation of missing values, statistic…

Entre el autor y el lector: producir libros manuscritos en catalán (siglos XII-XV)

2007

<font face="CGTimes" size="1"><p align="left">The present article deals with the material and personal circumstances that led to the production and circulation of Medieval Catalan Literary texts. Special attention has been paid to the material aspects (as studied by Palaeography and Codicology) of autograph manuscripts and their copies, taking into account that they had usually been imposed by those who had commissioned them.</p></font><br><br><font face="CGTimes" size="1"><p align="left">En el presente artículo se analizan todos los condicionantes, personales y materiales, que intervinieron en los procesos de producción y circulación posterio…

Del negocio y del amor: el diario del mercader Pere Seriol (1371)

1986

Factors explaining the interest margin in the banking sectors of the European Union

2003

Abstract This study analyses the interest margin in the principal European banking sectors (Germany, France, the United Kingdom, Italy and Spain) in the period 1993–2000 using a panel of 15,888 observations, identifying the fundamental elements affecting this margin. Our starting point is the methodology developed in the original study by Ho and Saunders [Journal of Financial and Quantitative Analysis XVI (1981) 581–600] and later extensions, but widened to take banks' operating costs explicitly into account. Also, unlike the usual practice in the literature, a direct measure of the degree of competition (Lerner index) in the different markets is used. The results show that the fall of marg…