Search results for "Caliza"

Mg2+-binding shifts the IM30 activity from membrane protection to membrane destabilization

2020

ABSTRACTThe inner membrane-associated protein of 30 kDa (IM30) is essential in chloroplasts and cyanobacteria. The spatio-temporal cellular localization of the protein appears to be highly dynamic and triggered by internal as well as external stimuli, mainly light intensity. A soluble fraction of the protein is localized in the cyanobacterial cytoplasm or the chloroplast stroma, respectively. Additionally, the protein attaches to the thylakoid membrane as well as to the chloroplast inner envelope or the cyanobacterial cytoplasmic membrane, respectively, especially under conditions of membrane stress. IM30 is involved in thylakoid membrane biogenesis and/or maintenance, where it either stabi…

Analytical-numerical methods for finding hidden oscillations in dynamical systems

2012

Investigations of Chl a aggregates cross-linked by dioxane in 3-methylpentane

1997

In this work, dioxane-bound aggregates of chlorophyll a are prepared in 3-methylpentane. The properties of the aggregates are studied by using steady-state and time-resolved spectroscopies. The Q -region absorption spectrum of the y chlorophyll a-dioxane aggregate shows four clearly resolvable narrow bands with comparable intensities. The band maxima are located at 683, 689, 698 and 702 nm. The emission spectrum consists of two emission bands centred at 699 and 702 nm suggesting the presence of two types of aggregates. High degree of fluorescence polarization is detected yielding the angles between the absorption transition moments with respect to the 702 nm emission transition moment. The …

Almodóvar, una población de la Cora de Tudmir sepultada en las dunas de Gardamar de Segura

1985

Classifiers, Quantifiers and Class Nouns in Hmong

1993

Four operations of nominal concretization are crucial for presenting a typology of classifier languages: individualization, classification, relationalization (possession), and referentialization. The first three of these operations are at work in the Hmong classifier system. The development of classifiers is described in connection with the degree of grammaticalization which will be measured by the three parameters of [± exact], [± entity], and cohesion. These parameters will be arranged in a three-dimensional continuum (cf. Fig. II.) which leads to the following evolutional steps of increasing grammaticalization: nouns, class nouns, quantifiers, intrinsic quantifiers (to be defined in the …

Variation and change in English resultative constructions

2010

AbstractThe system of English resultative constructions is in a state of flux characterized by variation between two of its most prominent competitors,way-constructions as inShe worked herwayto the topand reflexive structures as inShe worked herselfto the top.Although this competition has occasionally been addressed in the literature (cf. Jackendoff, 1990:213; Kirchner, 1951:158; Salkoff, 1988:54ff.), the present findings reveal that the long-standing rivalry between these structures has resulted in an increased use of theway-construction at the expense of reflexive structures. In addition, the coexistence ofway-constructions with semantically overlapping reflexive structures eventually cul…

Comparison of electron density properties in frozen and relaxed electronic distributions.

2003

Two kinds of electron densities for several small molecules (H(2), FH, CH(3)CH(3), CH(3)NH(2), CH(3)OH, and CH(3)F) have been generated for a wide range of bond distances. The first one, as the sum of the electron density of the isolated fragments, and the second one by optimizing the electron density at each given geometrical disposition. A number of properties of this two electronic distributions have been compared (position of the bond critical points, electron density, Laplacian, curvatures, and local energies). The differences, associated to the bond formation, are found to be very important for most of the cases.

Practical considerations for acoustic source localization in the IoT era: Platforms, energy efficiency, and performance

2019

The rapid development of the Internet of Things (IoT) has posed important changes in the way emerging acoustic signal processing applications are conceived. While traditional acoustic processing applications have been developed taking into account high-throughput computing platforms equipped with expensive multichannel audio interfaces, the IoT paradigm is demanding the use of more flexible and energy-efficient systems. In this context, algorithms for source localization and ranging in wireless acoustic sensor networks can be considered an enabling technology for many IoT-based environments, including security, industrial, and health-care applications. This paper is aimed at evaluating impo…

Analysis and Evaluation of Adaptive RSSI-based Ranging in Outdoor Wireless Sensor Networks

2019

Estimating inter-node distances based on received radio signal strength (RSSI) is the foundation of RSSI-based outdoor localization in wireless sensor networks (WSNs). However, the accuracy of RSSI-based ranging depends on environmental and weather conditions. Therefore, it is important that RSSI-based ranging adapts to prevailing conditions to improve its range and location accuracy. This paper analyzes and evaluates RSSI-based ranging and adaptive techniques in outdoor WSNs to improve the range quality. The findings highlight the effects of path loss exponent (PLE) estimation error and temperature change on RSSI-based ranging. Consequently, we analyze techniques for mitigating these detri…

Quantitative Analysis of Dynamic Association in Live Biological Fluorescent Samples

2014

Determining vesicle localization and association in live microscopy may be challenging due to non-simultaneous imaging of rapidly moving objects with two excitation channels. Besides errors due to movement of objects, imaging may also introduce shifting between the image channels, and traditional colocalization methods cannot handle such situations. Our approach to quantifying the association between tagged proteins is to use an object-based method where the exact match of object locations is not assumed. Point-pattern matching provides a measure of correspondence between two point-sets under various changes between the sets. Thus, it can be used for robust quantitative analysis of vesicle …