Radical

El presente ensayo constituye un intento de relación de tres cuerpos teóricos: el constructivismo radical; la biología de la cognición y la teoría pragmática del lenguaje. El propósito es describir el cómo podría darse la adquisición y/o emergencia de los deísticos de tiempo y espacio, que constituyen los componenetes léxicos básicos de la noción de realidad.  Con este fin se establecen complementariedades y afinidades teóricas que orientan el análisis epistemológico y de la psicología del lenguaje.

Un resumen sobre kla vida revolucionaria de Pedro Albizu Campos, luchador por la libertad y la independencia de Puerto Rico, el Caribe y América Latina. El último de los grandes revolucionarios latinoamericanos. Se ofrecen la bibliografía y estudios sobre su vida y obra. Es una figura de mucha importancia en la historia puertorriqueña.

In this work, the reactions of Cl with a series of secondary alcohols: 2-butanol, 2-methyl-2-butanol, 3-methyl-2-butanol, and 2,3-dimethyl-2-butanol have been studied through ab initio Möller–Plesset second order perturbation treatment (MP2) calculations with 6-311G∗∗ basis sets. Optimized geometries and vibrational frequencies have been obtained for transition states and molecular complexes appearing along the different reaction pathways. Furthermore, molecular energies have been calculated at Quadratic Configuration Interaction with Single, Double, and Triple Excitations (QCISD(T)) level in order to get an estimation of activation barriers. The theoretical rate constant was also calculated for the main reaction pathways using the Transition State Theory. The main aim of this work is to extend, from a theoretical point of view, the knowledge of this kind of reactions that play a significant role in atmospheric chemistry.

Baccharis trimera (Less.) DC (E1) and Baccharis crispa Spreng. (E2) possess potential antimicrobial and anti-inflammatory properties. Qualitative and quantitative information on seed germination on these species is scarce. The objective of this investigation was to establish a protocol for evaluating seed germination of E1 and E2 and to analice the scoring and curve fitting by the Germinator package, for different periods of germination were between 0.93 and 0.99. Both species showed differences in germinability and mean germination time, 27 days for E1 and 20 days for E2. The germination dispersion showed that E1 germination was homogeneous, with differences in growth pattern, whereas the results on germination of E2. The mean speed of germination determined with the experimental data was close to the values obtained by the Germinator package, with a maximum germination of more than 34%, proving that the software was efficient for evaluating germination.

Baccharis trimera (Less.) DC (E1) and Baccharis crispa Spreng. (E2) possess potential antimicrobial and anti-inflammatory properties. Qualitative and quantitative information on seed germination on these species is scarce. The objective of this investigation was to establish a protocol for evaluating seed germination of E1 and E2 and to analice the scoring and curve fitting by the Germinator package, for different periods of germination were between 0.93 and 0.99. Both species showed differences in germinability and mean germination time, 27 days for E1 and 20 days for E2. The germination dispersion showed that E1 germination was homogeneous, with differences in growth pattern, whereas the results on germination of E2. The mean speed of germination determined with the experimental data was close to the values obtained by the Germinator package, with a maximum germination of more than 34%, proving that the software was efficient for evaluating germination.

ABSTRACT This paper explores the relationships between calculative practices and innovative activities. It investigates how calculative practices such as accounting develop knowledge that functions as an engine (MacKenzie, 2006) for innovation. This is an attempt at exploring the role of accounting through its performative effects so that, rather than only describing the world, it also helps to change it. The thesis is that calculative practices are engines involved in luring actors into doing new things by their ability to inspire them to ask new questions and to see new opportunities.

El presente ensayo constituye un intento de relación de tres cuerpos teóricos: el constructivismo radical; la biología de la cognición y la teoría pragmática del lenguaje. El propósito es describir el cómo podría darse la adquisición y/o emergencia de los deísticos de tiempo y espacio, que constituyen los componenetes léxicos básicos de la noción de realidad.  Con este fin se establecen complementariedades y afinidades teóricas que orientan el análisis epistemológico y de la psicología del lenguaje.

Prosthetic joint replacements are used increasingly to alleviate pain and improve mobility of the progressively older and more obese population. Implant infection occurs in about 5% of patients and entails significant morbidity and high social costs. It is most often caused by staphylococci, which are introduced perioperatively. They are a source of prolonged seeding and difficult to treat due to antibiotic resistance; therefore, infection prevention by prosthesis coating with nonantibiotic-type anti-infective substances is indicated. A renewed interest in topically used silver has fostered development of silver nanoparticles, which, however, present a potential health hazard. Here we present new silver coordination polymer networks with tailored physical and chemical properties as nanostructured coatings on metallic implant substrates. These compounds exhibited strong biofilm sugar-independent bactericidal activity on in vitro-grown biofilms and prevented murine Staphylococcus epid...

Methacrolein oxide (MACRO) is an important carbonyl oxide produced in ozonolysis of isoprene, the most abundantly-emitted non-methane hydrocarbon in the atmosphere. We employed a step-scan Fourier-transform infrared spectrometer to investigate the source reaction of MACRO in laboratories. Upon UV irradiation of precursor CH2IC(CH3)CHI (1), the CH2C(CH3)CHI radical (2) was detected, confirming the fission of the allylic C‒I bond rather than the vinylic C‒I bond. Upon UV irradiation of (1) and O2 near 21 Torr, anti-trans-MACRO (3a) was observed to have an intense OO-stretching band near 917 cm−1, much greater than those of syn-CH3CHOO and (CH3)2COO, supporting a stronger O‒O bond in MACRO because of resonance stabilization. At increased pressure (86‒346 Torr), both reaction adducts CH2C(CH3)CHIOO (4) and (CHI)C(CH3)CH2OO (5) radicals were observed, indicating that O2 can add to either carbon of the delocalized propenyl radical moiety of (2). The yield of MACRO is significantly smaller...

This paper considers the place of academics in social movements, not as (predominantly) researchers or individuals but as activists acting collectively (Autonomous Geographies Collective, 2010). The notions of militant particularism and convergence space (Routledge, 2003; Cumbers et al. 2008) are deployed in relation to global justice networks, to analyze the discussions between academics planning direct action collectively and potentially with the network Climate Justice Action during the UN COP15 climate change summit in Copenhagen in December 2009. A notable tension in these debates centered on ‘radical ’ versus ‘reformist’ action and how either might contribute to transformative social change. The discussions ultimately led to the action of an academic seminar blockade, analyzed as a form of constructive resistance based on mutable particularisms flowing between shifting scales of convergence space. The paper concludes with the proposal that scholar activists should make a long-...

For a unitary right module $M$, there are two known partitions of simple modules in the category $\sigma[M]$: the first one divides them into $M$-injective modules and $M$-small modules, while the second one divides them into $M$-projective modules and $M$-singular modules. We study inclusions between the first two and the last two classes of simple modules in terms of some associated radicals and proper classes.

Our study considers various correlative structures based on the relative and demonstrative stems *k w o- and *to-, which can express both coordinating and subordinating functions. In the domain of quantitative identity, correlative symmetric structures such as quam... tam, quantus... tantus correspond to the asymmetric (i.e. subordinating) correlative series quo magis... eo magis, which expresses a conditional implication. In the domain of temporal identity, the correlative series cum... tum is initially symmetric and coordinating, aimed to express a relation of coextensive simultaneity. The temporal correlation can also develop a value of conditional, subordinating implication in non-factual, iterative contexts of contingent simultaneity. Moreover, we analyze another structure (idem ac, atque ; idem qui, etc.), which presents a type of qualitative relation inside one clause to express identity or resemblance.

Abstract. In this paper we study the structure of Gröbner bases with respect to block orders. We extend Lazard’s theorem and the Gianni-Kalkbrenner theorem to the case of a zero-dimensional ideal whose trace in the ring generated by the first block of variables is radical. We then show that they do not hold for general zero-dimensional ideals. 1.