Evolutionary study on two closed Gammarus (Crustacea, Amphipoda) species from Zagros Mountains (Iran) using molecular methods

Mitochondrial Cytochrome Oxidase Subunit I DNA sequences are a good discriminative marker for phylogenetic studies in crustaceans and especially in amphipoda. In the present study, molecular and morphological data were analyzed to test whether Gammarus lobifer authority and Gammarus balutchi authority which [sic] one or two geographically separated but morphologically similar species. The analyses proved that there are two species and that uplift of the Zagros Mountains was probably the most important cause of Allopatric speciation in this region during the Miocene period

Sexual Knowledge and Attitudes Among Premarital Couples: A Need for Future Educational Programs

Background: A significant number of youths have insufficient awareness about sexual health; whereas, correct sexual information is the main factor to prevent adverse consequences. Objectives: The current study aimed to investigate the sexual knowledge and attitudes in a sample of Iranian premarital couples. Patients and Methods: In this cross-sectional study, a sequential sample of 500 males and females who met the inclusion criteria was selected. This study was conducted in Kashan, Iran. Participants were in the age range of 16 to 40 years referred for premarital testing and educational classes. Two questionnaires containing demographic data and a culturally based sexual knowledge and attitudes scale were used for data collection. Data were analyzed using the Chi-square test, independent samples t-test, Mann-Whitney U, analysis of variance and multivariate regression. Results: About 50% of premarital couples had poor sexual knowledge and attitudes. The mean score of total sexual knowledge was 12.45 ± 8.54 out of a possible score of 33; and the mean score of total sexual attitudes was 121.63 ± 14.51 out of a possible score of 170. A significant association existed between the score of sexual knowledge and the level of education (P < 0.01), participants’ age (P < 0.01) and the score of sexual attitudes (P < 0.01). Conclusions: The majority of participants had poor sexual knowledge and attitudes regarding different aspects of sexual health

Modeling startup and shutdown transient of the microlinear piezo drive via ANSYS

The article describes the construction-design of the micro linear piezo drive intended for a peripheral cord tensioner in the reflecting surface shape regulator system for large-sized transformable spacecraft antenna reflectors. The research target -the development method of modeling startup and shutdown transient of the micro linear piezo drive. This method is based on application software package ANSYS. The method embraces a detailed description of the calculation stages to determine the operating characteristics of the designed piezo drive. Based on the numerical solutions, the time characteristics of the designed piezo drive are determined

Microlinear piezo drive experiments

The article embraces the experimental description of the micro linear piezo drive intended for the peripheral cord tensioner in the reflecting surface shape regulator system for large-sized transformable spacecraft antenna reflectors. The research target is the experimental investigation of the micro linear piezo drive to determine the stable oscillatory system operating modes which would include improved energy conversion parameters. The following points are briefly presented: test stand construction-design of the peripheral cord tensioner; the determined frequency characteristics and the identified resonant and actual frequencies of an oscillatory system under inertia load. A series of experiments has been conducted for both different preliminary voltages and inertia mass values

The GO4KIDDS Brief Adaptive Scale

Background. Accurate measurement of adaptive behaviour is important in both clinical and research contexts. While several good clinical measures exist, as well as brief research measures for adults with ID, there is need for a brief and efficient measure for research with children and youth. We present preliminary psychometric properties of a new scale we developed for such purposes, the GO4KIDDS Brief Adaptive Behaviour Scale. Materials and Methods. A large sample (n=432) of parents of youth (aged 3 to 20) with ID and/or ASD completed an online survey that included the new scale. A subsample of these parents (n=204) also completed the Scales of Independent Behavior-Revised Short Form (Bruininks et al., 1996). Results. The new scale has good internal consistency and correlates strongly with the Scales of Independent Behavior, thus supporting its reliability and validity. Conclusions. Although we do not recommend its use for clinical purposes, the GO4KIDDS Brief Adaptive Behaviour Scale may be useful for survey research with parents of children and youth with developmental disabilities

Determination of soluble wheat protein fractions using the Bradford assay

Background and objectives Determination of different grain protein fractions in wheat cultivars is an important task in analyzing bread baking quality. In many laboratories, the Bradford assay is used to determine protein concentrations in solutions. In any protein assay (including Bradford), the ideal protein to use as a standard is the purified protein being assayed. In the absence of such an absolute reference, protein another protein must be selected as a relative standard such as bovine serum albumin (BSA) which is widely used. The aim of this work was to find conversion factors for BSA to determine correct albumin–globulin, gliadin, and glutenin concentrations, because these purified wheat grain protein fractions are mostly not available to be used for calibration purposes. Findings In case of BSA calibration, gluten concentration was underestimated (50%–54%) compared to calibration with the respective purified wheat proteins (65%–70%) in extracts of wheat grain samples. This result is explained with the different amino acid composition of BSA and wheat protein fractions leading to a more intense signal with BSA in the Bradford assay. Calibration of the Bradford assay using BSA as well as purified wheat protein fractions allowed to calculate the conversion factors of 2.11 for BSA/albumin–globulin, 4.25 for BSA/gliadin, and 3.42 for BSA/glutenin. Application of these conversion factors proved to accurately adjust protein concentrations of wheat fractions originating from ten cultivars, determined with BSA calibration of the Bradford assay. Conclusions BSA calibration of the Bradford assay in combination with the conversion factors can be used to determine protein concentration of wheat grain fractions. Significance and novelty Findings of this study make a contribution toward the correction of a common method, to provide a basis for better comparability of research results from different laboratories

Influence of the oxygen partial pressure on the growth and optical properties of RF-sputtered anatase TiO2 thin films

Titanium dioxide (TiO2) films with thicknesses around 300 nm were deposited on glass substrates by reactive radio frequency (RF) magnetron sputtering at constant RF sputtering power (200 W), high sputtering pressure and room temperature. The effects of the oxygen presence on the growth and properties of the films were investigated using mixtures of Ar and O2 with different O2/(Ar + O2) ratios (from 0.0 to 0.3) during the sample deposition. The crystalline properties and surface morphology were characterized using X-ray diffraction (XRD) and atomic force microscopy (AFM), respectively. The optical properties were studied by ultraviolet–visible–near infrared (UV–Vis–NIR) spectroscopy, and the refractive index and the thickness of the samples were obtained using the Swanepoel method. The obtained results indicate that all the TiO2 films grew with an anatase phase and with an improved crystallinity at O2/(Ar + O2) = 0.2. However, AFM studies show that the grain size and surface roughness decrease as the O2/(Ar + O2) ratio increases from 0.0 to 0.3. Moreover, a maximum refractive index was obtained for the sample prepared at O2/(Ar + O2) = 0.2

On the way to large-scale and high-resolution brain-chip interfacing

Brain-chip-interfaces (BCHIs) are hybrid entities where chips and nerve cells establish a close physical interaction allowing the transfer of information in one or both directions. Typical examples are represented by multi-site-recording chips interfaced to cultured neurons, cultured/acute brain slices, or implanted “in vivo”. This paper provides an overview on recent achievements in our laboratory in the field of BCHIs leading to enhancement of signals transmission from nerve cells to chip or from chip to nerve cells with an emphasis on in vivo interfacing, either in terms of signal-to-noise ratio or of spatiotemporal resolution. Oxide-insulated chips featuring large-scale and high-resolution arrays of stimulation and recording elements are presented as a promising technology for high spatiotemporal resolution interfacing, as recently demonstrated by recordings obtained from hippocampal slices and brain cortex in implanted animals. Finally, we report on an automated tool for processing and analysis of acquired signals by BCHIs