bluuebunny/crossref_metadata_2025_split huggingface dataset:
High Frequency of Doubled Haploid Plant Production in Spelt Wheat
Authors: Lantos Csaba , Jenes Barnabás , Bóna Lajos , Cserháti Mátyás , Pauk János 
Published: November 2016

AbstractThis is the first study to report an efficient anther culture (AC) method for spelt wheat, which has an increasing importance not only in applied research but also in organic farming and changing nutritional standards. In this study, an efficient AC protocol has been described for ‘GK Fehér’ spelt wheat. The number of AC-derived embryo-like structures (ELS) was 62.2/100 anthers, from which we were able to regenerate 30.6 green plantlets per 100 anthers. The percentage of green plantlets production was 89.0% among the regenerated plantlets, while the phenomenon of albinism was restricted (3.8/100 anthers). Altogether, from AC of ‘GK Fehér’ 306 green plantlets were producedin vitroand 241 plants were acclimatized to the greenhouse conditions. Based on ploidy level analyses, 83 spontaneous doubled haploid (DH) plants were produced (8.3 DH plants/100 anthers), so the percentage of spontaneous rediploidization was 34.4%. The spontaneous DH plants produced fertile spikes, while a few seeds were harvested from seven partially fertile plants.
Development of a RAPD-Based Male-Specific Molecular Marker in Japanese Hop (Humulus japonicus Siebold & Zucc.)
Authors: Mizia Patryk , Cygan Magdalena , Denysenko Magdalena , Kwolek Dagmara , Chramiec-Głąbik Andrzej , Grabowska-Joachimiak Aleksandra , Joachimiak Andrzej J. 
Published: November 2016

Abstract
The male-specific DNA markers are very useful in molecular sexing of non-flowering plants and seeds of dioecious species. In this paper we identified ten Y chromosome-specific RAPD primers suitable for identification of male plants in three Cannabaceae species with sex chromosomes (Humulus lupulus, XX/XY; H. japonicus, XX/XY1Y2; Cannabis sativa, XX/XY). Basing on the nucleotide sequence of the OPJ-09 RAPD product we developed the HJY09 SCAR marker, which is very efficient in sexing of Japanese hop.
Ozone Effect On the Properties of Aramid Fabric
Authors: Wang Yan , Wiener Jakub , Militky Jiri , Mishra Rajesh , Zhu Guocheng 
Published: November 2016

Abstract
The limitation of aramid fiber is its surface property, which results in its very poor interfacial adhesion to most of commercial resins. In order to improve the surface property of the aramid fiber, ozone treatment was carried out in this work. The aramid fabrics were evaluated in terms of surface morphology, wicking effect, tensile property, and ball bursting test. The results showed that the surface morphology of aramid fabrics did not undergo an obvious change; the wicking effect increased slightly with an increase in ozone treatment time; the tenacity and elongation of aramid fibers and fabrics did not significant change after ozone treatment, but the tenacity and elongation of aramid yarns showed significant improvement after ozone treatment, and increased with the increase of ozone treatment time; the ball bursting load and penetration displacement had a slight increase as well after ozone treatment. Therefore, ozone treatment could be one method to improve the surface property of the aramid fiber.
A Time-Stepping DPG Scheme for the Heat Equation
Authors: Führer Thomas , Heuer Norbert , Sen Gupta Jhuma 
Published: November 2016

Abstract
We introduce and analyze a discontinuous Petrov–Galerkin method with optimal test functions
for the heat equation. The scheme is based on the backward Euler time stepping and uses an ultra-weak
variational formulation at each time step. We prove the stability of the method for
the field variables (the original unknown and its gradient weighted by the square root
of the time step) and derive a Céa-type error estimate. For low-order approximation spaces
this implies certain convergence orders when time steps are not too small in comparison with mesh sizes.
Some numerical experiments are reported to support our theoretical results.
Factorized Schemes of Second-Order Accuracy for Numerically Solving Unsteady Problems
Authors: Vabishchevich Petr N. 
Published: November 2016

Abstract
Schemes with the second-order approximation in time are considered for numerically solving the Cauchy problem
for an evolutionary equation of first order with a self-adjoint operator.
The implicit two-level scheme based on the Padé polynomial approximation
is unconditionally stable. It demonstrates good asymptotic properties in time
and provides an adequate evolution in time for individual harmonics of the solution (has spectral mimetic (SM) stability).
In fact, the only drawback of this scheme is the necessity to solve
an equation with an operator polynomial of second degree at each time level.
We consider modifications of these schemes, which are based on solving equations with operator polynomials of first degree.
Such computational implementations occur, for example,
if we apply the fully implicit two-level scheme (the backward Euler scheme).
A three-level modification of the SM-stable scheme is proposed. Its unconditional stability
is established in the corresponding norms. The emphasis is on the scheme, where the numerical algorithm
involves two stages, namely, the backward Euler scheme of first order at the first (prediction) stage
and the following correction of the approximate solution using a factorized operator.
The SM-stability is established for the proposed scheme. To illustrate the theoretical results of the work,
a model problem is solved numerically.
Nanoporous copper: fabrication techniques and advanced electrochemical applications
Authors: Abbas Aumber , Abbas Saleem , Wang Xianli 
Published: November 2016

AbstractNanoporous copper (NPC), a representative type of nanostructured materials, holds an extensive ability to generate propitious potential for a broad range of highly promising applications. Especially, with the advancement in fabrication techniques, NPC with numerous special and superior properties, such as unique pore structure, large surface-to-volume ratio, enlarged specific surface area, and high electrical and thermal conductivities, has boosted the interest to explore its electrochemical properties and extended its promising applications in energy, sensing, actuation, and catalytic systems. Therefore, timely updates of such a type of material are highly demanding and appealing for a broad audience. This review summarizes the latest advances in the development of NPC with a special focus on synthesis methods and state-of-the-art electrochemical applications such as electrocatalysts, sensors, and energy conversion/storage systems. The important scientific disputes and future research directions are also presented.
CYP2D6 variability in populations from Venezuela
Authors: Moreno Nancy , Flores-Angulo Carlos , Villegas Cecilia , Mora Yuselin 
Published: November 2016

Abstract
CYP2D6 is an important cytochrome P450 enzyme that plays an important role in the metabolism of about 25% of currently prescribed drugs. The presence of polymorphisms in the CYP2D6 gene may modulate enzyme level and activity, thereby affecting individual responses to pharmacological treatments. The most prevalent diseases in the admixed population from Venezuela are cardiovascular and cancer, whereas viral, bacterial and parasitic diseases, particularly malaria, are prevalent in Amerindian populations; in the treatment of these diseases, several drugs that are metabolized by CYP2D6 are used. In this work, we reviewed the data on CYP2D6 variability and predicted metabolizer phenotypes, in healthy volunteers of two admixed and five Amerindian populations from Venezuela. The Venezuelan population is very heterogeneous as a result of the genetic admixture of three major ethnical components: Europeans, Africans and Amerindians. There are noticeable inter-regional and inter-population differences in the process of mixing of this population. Hitherto, there are few published studies in Venezuela on CYP2D6; therefore, it is necessary to increase research in this regard, in particular to develop studies with a larger sample size. There is a considerable amount of work remaining before CYP2D6 is integrated into clinical practice in Venezuela.
House dust fungal communities’ characterization:
a double take on the six by sixty by six
(6 × 60 × 6) project
Authors: Amaro Raquel , Coelho Sónia D. , Pastorinho M. Ramiro , Taborda-Barata Luís , Vaz-Patto Maria A. , Monteiro Marisa , Nepomuceno Miguel C.S. , Lanzinha Joăo C.G. , Teixeira Joăo P. , Pereira Cristiana C. , Sousa Ana C.A. 
Published: November 2016

Abstract
Fungi are a group of microbes that are found with
particular incidence in the indoor environment. Their direct
toxicity or capability of generating toxic compounds
has been associated with a large number of adverse health
effects, such as infectious diseases and allergies. Given
that in modern society people spend a large part of their
time indoors; fungal communities’ characterization of this
environmental compartment assumes paramount importance
in the comprehension of health effects. House dust is an easy to obtain, time-integrative matrix, being its use
in epidemiological studies on human exposure to environmental
contaminants highly recommended. Furthermore,
dust can carry a great variety of fungal content that undergoes
a large number of processes that modulate and
further complexify human exposure. Our study aims to
identify and quantify the fungal community on house dust
samples collected using two different methodologies (an
approach not often seen in the literature): active (vacuum
cleaner bags) and passive sampling (dust settled in petri
dishes). Sampling was performed as part of the ongoing
6 × 60 × 6 Project in which six houses from Covilhă (Portugal),
with building dates representative of six decades,
were studied for a period of sixty days.
Orbits with minimal period for a class of autonomous second order one-dimensional Hamiltonian systems
Authors: Souissi Chouhaïd 
Published: November 2016

Abstract
We show, under an iterative condition which is similar to but stronger than that of Ambrosetti and Rabinowitz and by using a variational method,
the existence of a T-periodic solution of the autonomous superquadratic second order Hamiltonian system with even potential

z
¨

+

V
′

⁢

(
z
)

=
0

,

z
∈
ℝ

,

\ddot{z}+V^{\prime}(z)=0,\quad z\in\mathbb{R},

for any

T
>
0

{T>0}

. Moreover, such a solution has

T
/
k

{T/k}

as a minimal period for some integer

1
≤
k
≤
3

{1\leq k\leq 3}

.
Synthesis and characterization of 1,3,4-thiadiazole-2,5-dithio crown ethers
Authors: Çiçek Baki , Onbaşıoğlu Zekai 
Published: November 2016

Abstract
Hetero-crown ethers (ligands I–IV) containing 1,3,4-thiadiazole-2,5-dithiol (bismuthiol) were synthesized and fully characterized. The ligands were prepared by a nucleophilic substitution (SN2) reaction of the appropriate ethylene glycol dihalide derivatives with 1,3,4-thiadiazole-2,5-dithiol dipotassium salt under highly diluted conditions, and subsequent ring closure. Complexation constants and selectivity factors for these heterocyclic ligands in dichloromethane or chloroform were determined by ion-pair extraction from an aqueous solution containing Ag+, Ca2+, Zn2+, Fe3+, Cr3+, Co2+, Cd2+, Mg2+, Pb2+, Ni2+, Cu2+, Mn2+, Na+ and K+. These ligands could be applied as metal sensors and used to separate metals from various mixtures.
Helminths ofMilvago chimango temucoensis(Aves: Falconiformes) from Los Ríos Region, Chile: New Records for Neotropical Raptors
Authors: Oyarzún-Ruiz P. , Muñoz-Alvarado P. , Raffo E. 
Published: November 2016

SummaryThe goal of the present survey was to improve the scarce knowledge regard the endoparasites of raptors in Chile and South America. Thus, necropsy was performed on 14 chimango caracaraMilvago chimango temucoensisfrom Los Ríos Region, Chile. From all examined birds, 78.6% were positive to helminths. The species identified wereCapillaria tenuissima, Pterothominxsp.,Baruscapillaria falconis, Cosmocephalus obvelatus, Skrjabinoclavasp.,Synhimantus (Dispharynx) nasuta, Synhimantus(D.) sp.,Synhimantus (Synhimantus)sp.,Paracuaria adunca, Procyrnea spinosa, Porrocaecum depressum, Contracaecum rudolphiisensu lato,Stephanoprorasp. andPolymorphus mutabilis. All species listed, with the exception ofC. tenuissima, P. spinosaandP. depressum, are new records for the chimango caracara. FurthermoreC. obvelatus, Skrjabinoclavasp.,S. (D.)nasuta, S. (D.) sp.,P. adunca, C. rudolphiis. l.,Stephanoprorasp. andP. mutabilisall are new records for Neotropical raptors.
Morphometrical and molecular data on plant parasitic nematodes Longidorus attenuatus Hooper, 1961 and L. danuvii Barsi et al., 2007 (Nematoda: Longidoridae) reported from Ukraine for the first time
Authors: Susulovska S. , Susulovsky A. , Kornobis F.W. 
Published: November 2016

Summary
Genus Longidorus Micoletzky, 1927 consists of obligatory plant root ectoparasites. Some of the genus species are of economic importance as pests of agricultural plants. This paper presents first records of Longidorus attenuatus Hooper, 1961 and L. danuviiBarsi et al., 2007 from Ukraine. Data on morphometrics and D2-D3 28S rDNA region sequence are provided. Additionally, a D2-D3 28S rDNA sequence from a population described previously from Poland was included. For the first time L. danuvii has been found with plants of agricultural importance (Malus domestica Borkh., Pyrus sp. and Rubus idaeus L.). Additionally, this nematode species has been found for the first time in localities with relatively dry conditions (on the tops of the hills), which are distant from banks of rivers – biotopes from which it has been recorded previously.
Investigating social support patterns of single mothers from a social network perspective
Authors: Lumino Rosaria , Ragozini Giancarlo , Vitale Maria Prosperina 
Published: November 2016

AbstractIn the present study, we discuss how social network analysis approach can be fruitful exploited to study social support within family studies. An ego-centred network approach is adopted within a case study about social support networks of low income single mothers living in a city of southern Italy. We address three main issues. First, we aim to describe and explore the structure of social relationships that single mothers activate in order to obtain different kind of supports. Second, we investigate the main factors that affect the amount and variety of resources embedded in the single mothers’ support networks. Third, we analyse the relationship between the received social support embedded in the ego network and the support perceived by mothers. Beyond the description of composition and structure of ego-centred networks through network measures and factorial methods, a series of regression models was estimated to assess factors explaining received and perceived support of single mothers.
Women’s Social Capital in Academia: A Personal Network Analysis
Authors: Barthauer Luisa , Spurk Daniel , Kauffeld Simone 
Published: November 2016

AbstractDevelopmental networks are ego-centered networks, and were found to be beneficial for career success and advancement. Especially in academia, the benefits of developmental networks are critical due to limitations in career stability, and its up-or-out character. Overall, they facilitate career success and advancement by providing access to social capital, which is more or less attainable depending on certain structural network characteristics. Diverging access to social capital for women and men is well known, however, little is known about developmental networks of female and male academic staff. Therefore, this study investigated cohesion and brokerage as indicators for access to social capital to explore gender differences. The sample consisted of n = 594 ego-networks of PhDs and postdocs, working at German universities and research institutes. Cohesion was measured by density and degree; brokerage by effectiveness and constraint. Results revealed that based on Coleman’s cohesion theory (1988, 1990), female researchers showed less access to social capital through less dense networks, but bigger ones implying more social capital. Moreover, based on Burt’s brokerage theory (1992, 2005), female researchers showed, against our assumptions, more brokerage social capital by showing greater effectiveness, and less constraint. Results provide insight into men’s and women’s access to social capital.
Diffusion of Islam in the United States: Comparative Personal Conversion Social Networks
Authors: Erin Şakin 
Published: November 2016

Abstract
Conversion is one of the ways in which religion diffuses in society. Different than other diffusions, such as adopting a new technology or a fad, religious adoption can be riskier since it entails a life changing transition thereby making it a complex contagion. This study investigates whether Islam diffuses through weak ties or strong ties. By comparing conversion cases in Michigan, where there is a larger Muslim community, and Kentucky, where there is a less tangible Muslim community, I argue Islam is more likely to diffuse through what I call recessive or dominant weak ties in Michigan, whereas it is more likely to diffuse through strong ties in Kentucky. I collected personal social networks of 18 individuals who converted to Islam living in Michigan and 12 living in Kentucky. I found the research participants through mosques located in several cities in Michigan, including Ann Arbor, Ypsilanti, Flint, Detroit, Dearborn, and Canton, and two cities in Kentucky: Lexington and Louisville. Having investigated a set of egocentric conversion networks from both Michigan and Kentucky, I found that the existence of a Muslim community and how it is perceived by mainstream society is an ultimate factor in determining the strength of a tie to other Muslims. Thus, Islam is more likely to diffuse through weak ties where there is a Muslim community, but it is more likely to diffuse through strong ties where there is no such community.
A Personal Network Approach in Mixed-Methods Design to Investigate Transnational Social Protection
Authors: Bilecen Başak 
Published: November 2016

AbstractResearch on the cross-border practices that underpin the spatial dimension of personal relationships involves also the study of protective resources (e.g. care, information exchange and financial assistance). However, studies that examine such transnational practices within migrants’ personal networks face methodological challenges at both the data collection level and the data analysis level. For a comprehensive analysis of migrants’ life worlds, new methodological approaches to transnational practices and resource flows within personal networks are essential. Thus, this article aims to illustrate ways to study social protection by empirically capturing such practices. In addition to demonstrating that the combined use of personal network analysis and qualitative interviews is a fruitful approach, this study used a mixed-methods design contributing to capture the interrelationship between transnational social protection patterns and migrants’ strategies, as well as their meanings.
Makroökonomische Nachrichten und die Reaktion des 15-Sekunden-DAX: Eine Ereignisstudie zur Wirkung der ZEW-Konjunkturprognose / Announcement of Business Cycle Forecasts and the Reaction of the German Stock Market
Authors: Entorf Horst , Steiner Christian 
Published: November 2016

Summary
We study the response of the German stock market index DAX to the announcement of macroeconomic business cycle forecasts. Returns are computed using high-frequency data observed for 15-second intervals. Publications of macroeconomic US indicators at 2:30 p.m. (CET) have temporary and opening of the New York Stock Exchange at 3:30 p.m. (CET) have permanent effects on the volatility of the German DAX. Moreover, the intraday volatility of the DAX index has a U-shaped form, which has also been identified for other international stock markets. Major reactions of both returns and volatility occur within the first 15 to 60 seconds after the announcement, revealing a high efficiency of the German capital market. Unanticipated shocks cause asymmetric stock market returns: “good” news lead to more pronounced reactions than “bad” news. Moreover, there is evidence of mean reversion and calm-before-thestorm effects. Finally, serial correlation of returns is found to be a potentially spurious result of non-anticipated announcements of macroeconomic news.
Vermögenspreise, Alterung und Ersparnis / Asset Prices, Aging and Saving
Authors: Spahn Heinz-Peter 
Published: November 2016

Summary
In simple overlapping-generation models, the young save by purchasing assets from the old, who in turn finance their consumption by spending the proceeds. If household saving of a shrinking younger generation falls short of planned, constant asset sales by the old generation, asset prices might drop. This note argues that the above asset-meltdown argument holds only in case of a strict cash-in-advance constraint in a model with sharp demarcations between periods. Here, the shrinking size of the young generation establishes a supply-side constraint for production, and the old cannot realize the planned value of asset sales so that goods prices cannot be bidden up. In a more realistic setting of simultaneous and slow changes, only some flexibility and elasticity of the financial system is needed to resolve the cash-in-advance constraint. Excess goods demand then will produce rising prices. Then, necessarily additional savings (in the form of undistributed profits) arise as a flow-of-funds effect, which in turn help to maintain asset market equilibrium. Asset prices nevertheless might fall because of rising interest rates if monetary policy reacts to inflationary tendencies (if goods-supply constraints persist). But this line of reasoning is different from the shortage-of-saving myth.