bluuebunny/crossref_metadata_2025 huggingface dataset:
72 hour Holter monitoring, 7 day Holter monitoring, and 30 day intermittent patient-activated heart rhythm recording in detecting arrhythmias in cryptogenic stroke patients free from arrhythmia in a screening 24 h Holter
Authors: Kułach Andrzej , Dewerenda Milena , Majewski Michał , Lasek-Bal Anetta , Gąsior Zbigniew
Published: August 2020

Introduction

According to recent studies, silent atrial fibrillation (AF) is a common cause of cryptogenic ischemic stroke (CIS). 12-lead electrocardiogram (ECG) and 24 h Holter are not efficient to reveal an occult arrhythmic cause of stroke.

Objectives

The aim of the study was to evaluate 72 h Holter, 7 day Holter monitoring, and intermittent single-lead ECG recording in patients with CIS to identify cases with the arrhythmic cause of stroke in patients with CIS in whom 24 h ECG Holter was free from arrhythmia.

Methods

72 patients (aged 60 ± 9 years, 44 males) with CIS and no arrhythmic findings in 24 h Holter were enrolled. All patients had 7 day Holter monitoring and received handheld ECG recorder (CheckMe, Viatom) for ambulatory 30 ± 3 days ECG recording. AF, supraventricular tachycardia (SVT runs of ≥5 QRS), and other arrhythmias were assessed in the first 72 h of Holter recording, in 7 day-recording, and in handheld ECG strips.

Results

72 h-recording revealed AF in four cases (5.6%) and SVT in 18 (25%) cases. 7 day Holter confirmed AF in seven patients (10%) and SVT in 27 patients (37.5%). There was no difference in regards to CHADS2VASc score between patients with SVT and non-arrhythmic group (3.6 ± 1.1 vs 3.4 ± 1.6; p = NS). Symptoms did not correlate with findings. Patient-activated handheld ECG recorders were used with good compliance. The mean number of recordings was 49 ± 30. Except for PACs, there was only one case of AF documented in 3,531 strips.

Conclusions

7 day Holter performs better than 72 h and reveals supraventricular arrhythmias in every third and AF in 10% of CIS patients who were free from arrhythmia in 24 h ECG monitoring. 30 day intermittent ECG monitor does not yield diagnostic value in CIS.
School counselors’ role in supporting student voice initiatives in secondary schools
Authors: Voight Adam , King-White Dakota
Published: August 2020

School counselors play an integral role in supporting students academically, socially, and emotionally. However, due to various demands, school counselors often face time constraints that limit them from providing social and emotional support to students at the secondary level. In this case study, an analysis of qualitative interviews with 13 high school students and 20 administrators who participated in a student voice initiative in a large, urban school district showed that participating students gained social and analytic skills, and the initiative produced a more positive school climate. These outcomes align with those articulated in school counseling standards. Throughout the article, the researchers discuss a student voice initiative that was implemented district-wide, outcomes from the research study pertaining to the intervention, and implications for school counseling practices to support student voice initiatives at the secondary level.
Poly[bis(dimethylformamide-κO)-(μ8-5,5′′-dicarboxy-[1,1′:4′,1′′-terphenyl]-2′,3,3′′,5′-tetracarboxylato-κ8
O:O
1:O
2:O
3:O
4:O
5:O
6:O
7)dizinc(II)] — dimethylformamide (1/2), C18H19N2O8Zn
Authors: Li Guoqiang , Chen Guo , Liu Yanping , Wang Gao , Liu Liyu
Published: August 2020

C18H19N2O8Zn, orthorhombic, Pbca (no. 61), a = 17.4714(12) Å, b = 10.9180(7) Å, c = 20.0697(14) Å, V = 3828.4(4) Å3, Z = 8, R
gt(F) = 0.0449, wR
ref(F
2) = 0.1492, T = 100 K.
Crystal structure of (E)-2-(5,5-dimethyl-3-(4-((7-nitrobenzo[c][1,2,5]oxadiazol-4-yl)oxy)styryl)cyclohex-2-en-1-ylidene)malononitrile, C25H19N5O4
Authors: Huang Haiqing , Xu Li
Published: August 2020

C25H19N5O4, triclinic, P1̄ (no. 2), a = 7.5952(11) Å, b = 9.4729(13) Å, c = 16.260(2) Å, α = 76.559(2)°, β = 87.394(2)°, γ = 73.886(2)°, V = 1092.9(3) Å3, Z = 4, R
gt(F) = 0.0433, wR
ref(F
2) = 0.1293, T = 296(2) K.
The crystal structure of benzyl 3β-acetylglycyrrhetate, C39H54O5
Authors: Zhao Ruo-Lin , Wang Hui-Yun , Wang Xiao-Hui , Liu Li , Meng Qing-Guo
Published: August 2020

C39H54O5, monoclinic, P21 (no. 4), a = 6.98138(17) Å, b = 37.9050(6) Å, c = 7.28644(16) Å, β = 117.789(3)°, V = 1705.82(8) Å3, Z = 2, R
gt (F) = 0.0326, wR
ref(F
2) = 0.0872, T = 293(2) K.
Crystal structure of tetrakis (N-(2-hydroxyethyl)-N-isopropylcarbamodithioato-κS,S′)-(μ2(2-(pyridin-4-yl)vinyl)pyridine-κN,N′)dicadmium(II), C36H58Cd2N6O4S8
Authors: Yeo Chien Ing , Tiekink Edward R.T.
Published: August 2020

C36H58Cd2N6O4S8, monoclinic, P21/c (no. 14), a = 7.82927(4) Å, b = 11.64209(5) Å, c = 26.2493(1) Å, β = 95.6985(4)°, V = 2380.775(18) Å3, Z = 2, R
gt(F) = 0.0158, wR
ref(F
2) = 0.0411, T = 100(2) K.
Principles of extinction learning of nonaversive experience
Authors: Uengoer Metin , Lissek Silke , Tegenthoff Martin , Manahan-Vaughan Denise , Lachnit Harald
Published: August 2020

This review outlines behavioral and neurobiological aspects of extinction learning, with a focus on nonaversive experience. The extinction of acquired behavior is crucial for readaptation to our environment and plays a central role in therapeutic interventions. However, behavior that has been extinguished can reappear owing to context changes. In the first part of the article, we examine experimental strategies aimed at reducing behavioral recovery after extinction of nonaversive experience, focusing on extinction learning in multiple contexts, reminder cues, and the informational value of contexts. In the second part, we report findings from human imaging studies and studies with rodents on the neural correlates of extinction and response recovery in nonaversive learning, with a focus on ventromedial prefrontal cortex, hippocampus, and neurotransmitter systems.
Stress modulation of fear and extinction in psychopathology and treatment
Authors: Meir Drexler Shira , Merz Christian J. , Jentsch Valerie L. , Wolf Oliver T.
Published: August 2020

The glucocorticoid cortisol, a major player in the development of stress-related psychopathology, can also be used for the augmentation of extinction-based psychotherapies (e.g., exposure therapy). Substantial evidence supports its beneficial effects in the treatment of post-traumatic stress disorder and specific phobias. In this review, we first present the role of stress and cortisol in the development of maladaptive emotional memories. Then, we describe the mechanisms that may account for the cortisol-induced augmentation of exposure, namely, the enhancement of extinction memory consolidation and the reduction of the contextual dependency of the extinction memory. Finally, we discuss several considerations and limitations for the use of cortisol in psychotherapy, focusing on the possible adverse effects of cortisol in a reconsolidation-based (as opposed to extinction-based) intervention.
Examining the Relationship between Different Types of Information Disclosure of Foundations and Chinese Donations
Authors: Lin Zhijun , Li Ying
Published: August 2020

The philanthropy industry in China has rapidly advanced in the past few decades and become more prominent in importance. In this study, we examine and compare how the disclosure of different types of information of Chinese foundations is associated with donations by exploiting a unique dataset from the China Foundation Center (CFC). Specifically, we explore a unique index of transparency on information disclosure or the Foundation Transparency Index (FTI) provided by the CFC and investigate how the donations from Chinese donors are associated with the disclosure of foundation’s basic information, its financial information, project information and its governance information. We find that Chinese donations are more sensitive to foundation’s governance information disclosure. These findings have important policy implications for both Chinese policy makers and practitioners in the industry. Specifically, the results lend strong support to advocating for the imposition of more mandatory regulations on the disclosure of foundation information, especially the governance information.
Gender, language and prejudice: Implicit sexism in the discourse of Boris Johnson
Authors: Sunderland Jane
Published: August 2020

While linguistic prejudice is commonly understood to concern individuals or social groups because of the way they speak, we can also see it as damaging language usedaboutindividuals or social groups. In this article, I start by looking at the traditional sociolinguistic understanding of linguistic prejudice, then go on to look rather widely at various forms of prejudicial/sexist language aboutwomen. In doing so, I identify various lexical asymmetries and associated “lexical gaps”. The main part of the article takes this further by exploring how certain insults to men draw on an understood prejudice again women. I illustrate this with a “telling case”: three naturally occurring examples of prejudicial, sexist language recently used by British prime minister Boris Johnson:big girl’s blouse,man upandgirly swot. For all three to work, they draw on what we might call a discourse of “Women as ineffectual”. I conclude with a discussion of intentionality as regards this sort of prejudicial language use, what it is intended to achieve and how it can be resisted.
Greek Gospels and Aramaic Dead Sea Scrolls: Compositional, Conceptual, and Cultural Intersections
Authors: Perrin Andrew B.
Published: August 2020

The Aramaic Dead Sea Scrolls expanded the scope of authoritative and parascriptural traditions that reimagine the lives and times of ancestral figures. In several cases, these Aramaic writings include birth notices or narratives. The Genesis Apocryphon and Aramaic Levi Document portray the patriarchs receiving divine revelations regarding the genealogy and destiny of their progeny. Parents in both texts respond with awe yet keep the knowledge to themselves, reflecting on it in their “heart.” This article brings the revelatory tradition and terminology of the Aramaic Dead Sea Scrolls to bear on Mary’s responses to claims of Jesus’ messianic potential (Luke 2:19) and otherworldly paternity (Luke 2:51). The study underscores the importance of the Qumran Aramaic texts for evaluating Lukan special material and points to the relevance of these writings for recovering the Second Temple contexts of the thought, practice, and literature of the early Jesus movement. The focused case study concludes with methodological recommendations for renewed joint research on Qumran and emerging Christianity. The prescribed approach strives to avoid both “parallel-o-mania” and “parallel-o-phobia” by accounting for the complex compositional, conceptual, and cultural dynamics of both collections.
The Decline of US Power and the Future of Conflict Management after Covid
Authors: Skaperdas Stergios
Published: August 2020

The US’s ability to project power in Eurasia has been declining for some time. With the pandemic accelerating that decline, reviving international institutions of conflict management becomes urgent. Enhancing the UN and other atrophied international organizations, and negotiating treaties on nuclear arms issues, cyber warfare, space warfare, and new weapons are measures that have become necessary for minimizing the chance of nuclear catastrophe as well as reducing the likelihood of other wars.
Economics and the Covid Pandemic in the UK
Authors: Hartley Keith
Published: August 2020

Covid is a virus which has been dominated by medical experts offering different views on its causes and treatments. But the virus has economic dimensions which need to be explored. Specifically, trade-offs arise between population safety and prosperity. Protecting the population from the virus required the economy to be closed leading to job losses, plant closures and poverty for some groups in society.
The other virus: Covid-19 and violence against civilians
Authors: Anderton Charles H.
Published: August 2020

The article analyzes how Covid-19 might affect the risk of violence against civilians (VAC) in two ways. First, I glean from Armed Conflict Location and Event Data the quantity and types of Covid-related VAC attacks. Second, I present possible economic channels by which Covid could affect mass atrocity risk. I apply the channels to identify possible Covid-related economic risks for VAC in Democratic Republic of the Congo.
Fabrication of ultrahigh-molecular-weight polyethylene porous implant for bone application
Authors: Olalde Beatriz , Ayerdi-Izquierdo Ana , Fernández Rubén , García-Urkia Nerea , Atorrasagasti Garbiñe , Bijelic Goran
Published: August 2020

Porous implants play a crucial role in allowing ingrowth of host connective tissue and thereby help in keeping the implant in its place. With the aim of mimicking the microstructure of natural extracellular matrix, ultrahigh-molecular-weight polyethylene (UHMWPE) porous samples with a desirable pore size distribution were developed by combining thermally induced phase separation and salt leaching techniques. The porous UHMWPE samples consisted of a nanofibrous UHMWPE matrix with a fibre diameter smaller than 500 nm, highly interconnected, with a controllable pore diameter from nanoscale to 300 µm. Moreover, a porous UHMWPE sample was also developed as a continuous and homogeneous coating onto the UHMWPE dense sample. The dense/porous UHMWPE sample supported human foetal osteoblast 1.19 cell line proliferation and differentiation, indicating the potential of porous UHMWPE with a desirable pore size distribution for bone application. An osseointegration model in the sheep revealed substantial bone formation within the pore layer at 12 weeks via SEM evaluation. Ingrown bone was more closely opposed to the pore wall when compared to the dense UHMWPE control. These results indicate that dense/porous UHMWPE could provide improved osseointegration while maintaining the structural integrity necessary for load-bearing orthopaedic application.
Effects of lamellar microstructure of retinoic acid loaded-matrixes on physicochemical properties, migration, and neural differentiation of P19 embryonic carcinoma cells
Authors: Ghorbani Farnaz , Ghalandari Behafarid , Ghorbani Farimah , Zamanian Ali
Published: August 2020

In this study, retinoic acid loaded-PLGA-gelatin matrixes were prepared with both freeze-casting and freeze-drying techniques. Herein, the effect of unidirectional microstructure with tunable pores on release profile, cellular adhesion, migration, and differentiation was compared. Morphological observation determined that highly interconnected porous structure can be formed, but lamellar pore channels were observed in freeze-casting prepared constructs. The absorption ratio was increased, and the biodegradation rate was decreased as a function of the orientation of microstructure. The in-vitro release study illustrated non-Fickian release mechanism in both methods, so that erosion has predominated over diffusion. Accordingly, PLGA-gelatin scaffolds prepared with freeze-drying technique showed no adequate erosion due to the rigid structure, while freeze-casting one presented more favorable erosion. Microscopic observations of adhered P19 embryonic cells on the scaffolds showed that the freeze-casting matrixes with unidirectional pores provide a more compatible microenvironment for cell attachments and spreading. Besides, it facilitated cell migration and penetration inside the structure and may act as guidance for neuron growth. Improvement in the expression of neural genes in unidirectionally oriented pores proved the decisive role of contact guidance for nerve healing. It seems that the freeze-cast PLGA-gelatin-retinoic acid scaffolds have initial features for nerve tissue regeneration studies.
Experimental investigations on compressive, impact and prediction of stress-strain of fly ash-geopolymer and portland cement concrete
Authors: S Nagajothi , S Elavenil
Published: August 2020

The recent technology of geopolymer concrete is a substitute material for ordinary portland cement concrete which is produced from the polycondensation reaction of aluminosilicate materials with alkaline activator solutions. The cost of river sand is high since the demand for the same is also high. Manufactured sand is used as a replacement material for river sand in geopolymer concrete. This paper mainly focuses to find the properties of fly ash (FA) – based geopolymer concrete under ambient cured temperature like compressive strength, stress strain behaviour, modulus of elasticity, Poission’s ratio and impact resistance. The result of geopolymer concrete is compared with ordinary portland cement concrete. The elasticity modulus and Poission’s ratio of geopolymer concrete are lower than conventional concrete. The Stress-strain behaviour of geopolymer concrete is similar to conventional concrete. The impact resistance of geopolymer concrete is very good when compared with conventional concrete.
99mTc-citrate-gold nanoparticles as a tumor tracer: synthesis, characterization, radiolabeling and in-vivo studies
Authors: Essa Basma M. , El-Mohty Ahmed A. , El-Hashash Maher A. , Sakr Tamer M.
Published: August 2020

Targeted drug delivery system can reduce the side effects of high drug concentration by improving drug pharmacokinetics at lower doses. Citrate-gold nanoparticles (AuNPs) as a drug delivery system were synthesized via green nanotechnology technique to be used as a new imaging platform for tumor targeting. Citrate-AuNPs were synthesized with core size of 10 nm. Citrate-AuNPs were labeled with technetium-99m (99mTc) with radiochemical yield of 95.20 ± 2.70% with good in-vitro stability in both saline and human serum and well in-vivo studied in both normal and solid tumor bearing mice. The in-vivo biodistribution study of [99mTc]Tc-citrate-AuNPs in solid tumor bearing mice (as preliminary study) showed a high accumulation in tumor site with tumor/muscle of 4.35 ± 0.22 after 30 min post injection. The direct intratumoral (I.T) injection of [99mTc]Tc-citrate-AuNPs showed that this complex was retained in the tumor up to 77.86 ± 1.90 % at 5 min and still around 50.00 ± 1.42 % after 30 min post injection (p.i.). The newly presented nano-platform could be presented as a new potential radiopharmaceutical tumor imaging probe.
Highly Sensitive and Robust Capillary Electrophoresis-Electrospray Ionization-Mass Spectrometry: Interfaces, Preconcentration Techniques and Applications
Authors: Wu Huanming , Tang Keqi
Published: August 2020

Capillary electrophoresis (CE) coupled with mass spectrometry (MS) through electrospray ionization (ESI) is a promising alternative technique to liquid chromatography-ESI-MS (LC-ESI-MS) due to its high separation efficiency and high detection sensitivity. A sensitive and robust interface is essential in CE-ESI-MS. Continued development of CE-ESI-MS interfaces in the last decade, including junction-at-the-tip interfaces and sheathless interfaces, has improved the sensitivity and robustness of CE-ESI-MS significantly. The limited loading capacity of CE, one of major reasons that limits the utility of CE as a routine separation method, has also been addressed effectively by the use of in-capillary sample preconcentration techniques, such as transient CITP/CZE and dynamic pH junction. CE-ESI-MS could yield higher sensitivity as compared with the conventional LC-ESI-MS, and, therefore, is capable of identifying more proteins and peptides when the sample amount is very limited, such as single cell analysis. To improve the protein sequence coverage, CE-ESI-MS can also be used as a complementary technique to LC-ESI-MS, or combined with reversed phase LC to form a two dimensional separation technique. CE-ESI-MS is also effective in quantifying targeted peptides/proteins in complex bio-matrix.
Kinetics of leaching: a review
Authors: Faraji Fariborz , Alizadeh Amirhossein , Rashchi Fereshteh , Mostoufi Navid
Published: August 2020

Kinetics, as a fundamental requirement of nearly all industrial activities and engineering researches, plays a great role in leaching processes. Although there are many pieces of research on its application, there is not a clear pathway for investigating the kinetics of leaching and researchers usually follow different strategies in their studies. The conventional investigation techniques, which usually do not consider the mixed mechanisms and possibility of any change in the mechanism, normally include many calculations, plots, and inadequate capabilities to detect changes in the controlling mechanism of leaching. In this review, the main mathematical models of leaching and all possible scenarios are presented and discussed. The effect of various leaching parameters (including leaching agent, temperature, particle size, agitation, and solid to liquid ratio) on the rate of dissolution is summarized. Besides, two main approaches of rate determination step (single controlling mechanism and combined resistances method) are described and compared by reporting related equations and suitable examples. A technique to detect any changes in the leaching controlling mechanism is introduced and the alternatives to confirm the results are described. Additional models and equations were suggested for the cases that there is no agreement between data and the conventional models. Also, situations which are ignored in simple models (e.g., reversibility of the leaching reactions, adsorption and desorption of leached species, influence of charge and surface potential, existence of multiple reactants in the solid, galvanic effect, wide particle size distribution, etc.) to develop more legalistic models are discussed. Considering various possible mechanisms in the kinetics of leaching, equations are derived for industrial leaching reactors.
Fragmentation of brain apolipoprotein E (ApoE) and its relevance in Alzheimer's disease
Authors: Amponsah Asiamah Ernest , Feng Baofeng , Guo Ruiyun , Zhang Wei , He Jingjing , Kong Desheng , Dong Tianyu , Ma Jun , Cui Huixian
Published: August 2020

Alzheimer's disease (AD) is a very common cause of dementia in the elderly. It is characterized by progressive amnesia and accretions of neurofibrillary tangles (NFTs) of neurons and senile plaques in the neuropil. After aging, the inheritance of the apolipoprotein E (ApoE) epsilon 4 (ε4) allele is the greatest risk factor for late-onset AD. The ApoE protein is the translated product of the ApoE gene. This protein undergoes proteolysis, and the resulting fragments colocalize with neurofibrillary tangles and amyloid plaques, and for that matter may be involved in AD onset and/or progression. Previous studies have reported the pathogenic potential of various ApoE fragments in AD pathophysiology. However, the pathways activated by the fragments are not fully understood. In this review, ApoE fragments obtained from post-mortem brains and body fluids, cerebrospinal fluid (CSF) and plasma, are discussed. Additionally, current knowledge about the process of fragmentation is summarized. Finally, the mechanisms by which these fragments are involved in AD pathogenesis and pathophysiology are discussed.
Methods of variational data assimilation with application to problems of hydrothermodynamics of marine water areas
Authors: Agoshkov Valery I. , Lezina Natalia R. , Parmuzin Eugene I. , Sheloput Tatiana O. , Shutyaev Victor P. , Zakharova Natalia B.
Published: August 2020

A series of problems related to the class of inverse problems of ocean hydrothermodynamics and problems of variational data assimilation are formulated in the present paper. We propose methods for solving the problems studied here and present results of numerical experiments.
The effects of silibinin on oxidative stress and microRNA-10b expression in animal models of breast cancer
Authors: Soleimani Farhad , Sharifi Rasoul , Mahmoodi Minoo , Kassaee Seyed Mehrdad
Published: August 2020

Background and aims

Among the factors associated with cancer are the oxidative stress and increased expression of some microRNA (miRs). Silibinin has an anti-tumor effect. Therefore, this study evaluates the effects of silibinin on oxidative stress indices and miR-10b expression in the animal models of breast cancer.

Material and methods

In this study, 48 Balb/c mice were divided into six groups (each group contains eight mice): the healthy control, the cancer control, the healthy group receiving 20 mg of silibinin, the cancer group receiving 20 mg of silibinin, the cancer group receiving 40 mg of silibinin and the cancer group receiving 80 mg of silibinin for three weeks. In order to induce cancer, 4T1 cell line was used. After obtaining breast tumor samples, the levels of Malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GPX) and miR-10b expression in breast tumor biopsy were evaluated. Data were analyzed using one-way ANOVA, Kruskal–Wallis, Mann–Whitney and t-test (p<0.05).

Results

The use of silibinin at different doses increased the activity of SOD and GPX (significantly) and the level of TAC (significantly) in the treatment group compared to untreated cancerous mice, but mir-10b and MDA were decreased non-significant and significantly respectively.

Conclusion

Silibinin led to a non-significant reduction of miR-10b in the treatment group compared to untreated cancerous mice. Silibinin has been shown to improve oxidative stress in breast cancer mice.
Synthetic peptide vaccine for Foot-and-Mouth Disease: synthesis, characterization and immunogenicity
Authors: Mansuroğlu Banu , Derman Serap , Kızılbey Kadriye , Canım Ateş Sezen , Mustafaeva Akdeste Zeynep
Published: August 2020

Background

The conjugations of antigenic synthetic peptide sequences with carrier polymers have opened new possibilities for the treatment of diseases. In this study, 135–161 peptide sequence of VP1 capsid protein of Foot-and-Mouth Disease was cross-linked with P(VP-co-AA) copolymer by covalent conjugation using water-soluble carbodiimide at different ratio of components (γ=5, 7, 9, 11, 15) for the first time in the literature.

Materials and methods

Bioconjugates were characterized by gel permeation chromatography and fluorescence spectroscopy to identify occurrences of the conjugates. After characterization, γ=15 bioconjugate was determined as optimum conjugate for immunization studies and IC50 value is calculated as 1.227 mg/mL. By determining the nontoxic range, indirect ELISA were performed to evaluate the immune response elicited in balb/c mice by either peptide or P(VP-co-AA)-peptide bioconjugates (γ=15). Two injections were applied to each group and high immune responses were obtained against γ=15 conjugate compared to free peptide and control.

Results and conclusion

At the end of 9-week, the general pattern of immunoreactivity was acquired as γ=15>>peptide>control. Peptide formulated in the conjugated form had higher antibody response than free peptide and control (p<0.01, for all in both cases), this conjugate formulation put forward the adjuvant activity of P(VP-co-AA) polymer.
New ternary MgCo2Ga5 and MgNi2Ga5 gallides
Authors: Pavlyuk Nazar , Dmytriv Grygoriy , Pavlyuk Volodymyr , Rożdżyńska-Kiełbik Beata , Gil Alina , Chumak Ihor , Ehrenberg Helmut
Published: August 2020

The crystal structure of new isostructural compounds MgCo2Ga5 and MgNi2Ga5 has been investigated using single-crystal X-ray diffraction. Both compounds represent a new type of structure: orthorhombic, space group Pnnm, oP16, with the following lattice parameters: a = 6.2700(2) Å, b = 6.6946(2) Å, c = 6.0789(2) Å (for MgCo2Ga5) and a = 6.2693(3) Å, b = 6.6968 Å, c = 6.0794 Å (for MgNi2Ga5). The MgCo2Ga5 and MgNi2Ga5 are closely related to the tetragonal structure of CoGa3 which crystallizes in the ht-IrIn3 type. The orthorhombic structures of MgCo2Ga5 and MgNi2Ga5 are derived from CoGa3 via a translationengleiche symmetry reduction of index 2. The symmetry reduction from P42/mnm to Pnnm causes that the 4c site splits into two sites 2c and 2d. The gallium atoms together with cobalt or nickel form 3D-nets with channels, in which magnesium atoms are inserted. The formation of these polyatomic nets is confirmed by distribution of electron localization function (ELF) and charges of atoms.
Resonant interactions between the fundamental and higher harmonic of positron acoustic waves in quantum plasma
Authors: Sarkar Jit , Chandra Swarniv , Ghosh Basudev
Published: August 2020

In this paper, we study the second harmonic generation and its interaction with the fundamental mode in a magnetised dense positron-ion plasma interacting with laser pulses. It has been shown that different harmonics propagate with different phase velocities. The gradual evolution of the fundamental wave into higher harmonics is studied, and the conversion efficiency is calculated. Dependence of conversion efficiency on wavenumber shifts and the applied magnetic field has also been examined.
Factors related to sarcopenia and functional capacity in institutionalized elderly
Authors: Marques Marilia Braga , Coutinho Janaína Fonseca Victor , Sousa Caroline Ribeiro , Sales Joana Maria Rocha , Brito Maria Lucimar Castro de , Souza Rodrigo Lopes de Paula
Published: August 2020

Objective: to analyze factors related to sarcopenia and functional capacity of institutionalized elderly. Methods: descriptive, correlational, cross-sectional study, with 92 elderly people, in four long-term institutions. For data collection, a socioeconomic and clinical form, Mini Mental State Examination, Barthel Index and Timed Up and Go test were applied. In the analysis, the chi-square and Fisher’s exact tests were adopted. Results: it was identified that 68 (73.9%) had probable sarcopenia, 7 (7.6%) sarcopenia and 11 (12.0%) severe sarcopenia. The factors associated with sarcopenia were education (p=0.017), risk of falls (p=0.000) and chronic kidney disease (p=0.040). As for functional capacity, 49 (53.3%) had mild dependence, 40 (43.5%) moderate and 3 (3.3%) severe. The factors associated with functional capacity were risk of falls (p=0.010), polypharmacy (p=0.017) and education (p=0.019). Conclusion: it was found that education, polypharmacy, chronic kidney disease, risk of falls, falls and sarcopenia can influence the functional capacity of institutionalized elderly.
Burnout syndrome and perceptions about safety climate among intensive care professionals
Authors: Sousa Ana Kele Arcanjo de , Ribeiro Silvania Braga , Vasconcelos Patrícia Freire de , Oliveira Roberta Meneses , Silva Maria Eliane da , Freire Vanessa Emille Carvalho de Sousa , Sousa Vitória Talya dos Santos
Published: August 2020

Objective: to analyze the relationship between Burnout Syndrome and perceptions about safety climate among intensive care professionals. Methods: a cross-sectional study with 51 health professionals from a public hospital in northeastern Brazil. The following instruments were applied: the Maslach Burnout Inventory, the Safety Attitudes Questionnaire, and a Sociodemographic questionnaire. Descriptive, analytical (Spearman’s test) and inferential statistics were adopted. Results: there was a high level of emotional exhaustion (64.7%) and low levels of depersonalization (74.5%) and personal accomplishment (56.8%) in the Burnout assessment. The safety climate was considered satisfactory, with the Safe Behaviors domain having the highest average. There was a moderate correlation between the Stress recognition and Depersonalization subscales. Conclusion: there was a correlation between safety climate and Burnout in the Stress recognition and Depersonalization dimensions, with the latter being considered a consequence of stressful factors which distance professionals from patients.
A Rapid, SuperSelective Method for Detection of Single Nucleotide Variants in Caenorhabditis elegans
Authors: Touroutine Denis , Tanis Jessica E
Published: August 2020

With the widespread use of single nucleotide variants generated through mutagenesis screens and genome editing technologies, there is pressing need for an efficient and low-cost strategy to genotype single nucleotide substitutions. We have developed a rapid and inexpensive method for detection of point mutants through optimization of SuperSelective (SS) primers for end-point PCR in Caenorhabditis elegans. Each SS primer consists of a 5′ “anchor” that hybridizes to the template, followed by a noncomplementary “bridge,” and a “foot” corresponding to the target allele. The foot sequence is short, such that a single mismatch at the terminal 3′ nucleotide destabilizes primer binding and prevents extension, enabling discrimination of different alleles. We explored how length and sequence composition of each SS primer segment affected selectivity and efficiency in various genetic contexts in order to develop simple rules for primer design that allow for differentiation between alleles over a broad range of annealing temperatures. Manipulating bridge length affected amplification efficiency, while modifying the foot sequence altered discriminatory power. Changing the anchor position enabled SS primers to be used for genotyping in regions with sequences that are challenging for standard primer design. After defining primer design parameters, we demonstrated the utility of SS primers for genotyping crude C. elegans lysates, suggesting that this approach could also be used for SNP mapping and screening of CRISPR mutants. Further, since SS primers reliably detect point mutations, this method has potential for broad application in all genetic systems.
Eine empirische Analyse des Nutzungsverhaltens von Sparkassenkunden zur Prognose der Kundenbindung
Authors: Zettler Julia , Schiereck Dirk
Published: August 2020

Die Niedrigszinsphase, die voranschreitende Regulierung und die Digitalisierung erhöhen den Margendruck bei einer stärkeren wettbewerblichen Ausrichtung des Retailbanking-Marktes. Gerade bei etablierten Finanzinstituten mit hohen Marktanteilen, wie zum Beispiel den Sparkassen, sind Informationen über mögliche Einflussparameter auf die Kundenbindung erfolgskritisch. Diese Studie analysiert den Einfluss des Produktportfolios eines privaten Kunden auf seine Kundenbindung. Besonderes Augenmerk wird zunächst auf die Begriffsschärfung der Kundenbindung gelegt. Die anschließende Analyse erfolgt über einen fundierten datenbasierten Ansatz: Resultate von State of the Art Machine Learning-Ansätzen werden mit Ergebnissen umfangreicher deskriptiver und induktiver Analysen plausibilisiert. Basis für die Untersuchung bilden Kundendaten über fünf Jahre einer mittelgroßen, deutschen Sparkasse. Unter anderem wird gezeigt, dass die Anzahl der Produkte die Art der Produkte bezogen auf die Aufrechterhaltung der Kundenbindung als Indikator dominiert.
ЗМІНИ НА СВІТОВИХ ФІНАНСОВИХ РИНКАХ ПІД ВПЛИВОМ ГЕОЕКОНОМІЧНИХ ІМПЕРАТИВІВ СУЧАСНОСТІ
Authors: БОРЗЕНКО Олена
Published: August 2020

Посилення невизначеності світової економіки та підвищення турбулентності міжнародного ринку капіталів породжують глобальні ризики для фінансових ринків, особливо в сучасний період кризи пандемії. Використання переваг фінансової глобалізації за мінімізації її ризиків вимагає як застосування специфічних заходів регулювання припливу-відпливу капіталів, так і проведення системних комплексних економічних реформ за успішними моделями і прикладами розвинутих країн світу і країн, що розвиваються. У сучасному методологічному концепті виявляються закономірності еволюції моделей функціонування фінансового ринку. Глобальна корпоратизація, регіональна локалізація та інституціональна організація фінансових ринків є основними геоекономічними імперативами, що впливають на зміну форматів фінансових ринків. З геоекономічних позицій регулятивні механізми стабільного і прозорого функціонування фінансових ринків створюють світову фінансову систему більш гнучкою. У новій конфігурації міжнародних фінансових організацій окреслюються нові орієнтири через впровадження розроблених методологічних кроків економічної політики країн з ринками, що розвиваються. Глобалізація в сучасному світі потужно вплинула на посилення конкурентної боротьби між країнами світу за інвестиції, технології, робочі місця, тому країнам, що розвиваються, потрібно чітко визначити мету, шлях і швидко здійснити таку трансформацію, яка базувалася б на комплексному соціально-економічному реформуванні та стратегії підвищення національної конкурентоспроможності. З комплексними і чітко окресленими пріоритетами і реформами фінансові ринки країн, що формуються, та країн, які розвиваються, матимуть перспективу розвитку і можливість протидіяти негативним наслідкам фінансової глобалізації у світі.
ВНУТРІШНІ ЧИННИКИ ЗМІЦНЕННЯ СТІЙКОСТІ ФІНАНСОВОЇ СИСТЕМИ УКРАЇНИ
Authors: ШЕМАЄВА Людмила , ЖАЛІЛО Ярослав , ГЛАДКИХ Дмитро , КАСПЕРОВИЧ Юлія , ЛОНДАР Лідія , ДЕШКО Антоніна
Published: August 2020

Розглянуто проблему забезпечення стійкості фінансової системи України через призму її спроможності активно реагувати на вплив внутрішніх дисбалансів у фіскальній, борговій, банківській сферах, а також координувати дії органів економічного управління щодо подолання дисбалансів, пов’язаних з розгортанням глобальної кризи і необхідністю протидії поширенню захворюваності на COVID-19.Проаналізовано внутрішні чинники та проблеми забезпечення стійкості фінансової системи України і на цій основі визначено напрями її забезпечення. Окреслено чинники, які в сучасних умовах негативно впливають на фіскальну стійкість України, що зумовлено слабкою функціональністю податкової системи, яка проявляється у недовиконанні фіскальної функції податків, обмеженості потенціалу їх регулюючої функції та недовірі до контролюючої. Спостерігається відокремленість бюджетної політики від стратегічних завдань економічної політики держави, оскільки необхідність чіткого виконання поставлених завдань, у першу чергу соціального характеру, формує її короткострокову спрямованість. Попри певне покращення окремих показників, рівень боргової стійкості України нині залишається низьким, а національна економіка надто вразливою як до зовнішніх шоків, так і до внутрішніх диспропорцій. Негативними чинниками досягнення стійкості фінансової системи залишаються: вкрай повільне відновлення банківського кредитування, висока питома вага проблемних кредитів у кредитному портфелі банків, значний обсяг неповернутих кредитів рефінансування, висока питома вага валютних активів і пасивів, слабкі темпи нарощування прибутковості та капіталізації банківської системи.Запропоновано основні пріоритети державної політики в бюджетно-податковій, борговій, банківській сферах з метою зміцнення стійкості фінансової системи України. Підкреслюється необхідність розгляду макроекономічної стабілізації у невідривному контексті структурних реформ; упровадження механізмів оцінки стійкості та координації складових фінансової політики, що потребуватиме взаємодії НБУ з органами виконавчої влади в рамках єдиної системи виявлення та подолання макроекономічних дисбалансів.
Deducing Three Gap Theorem from Rauzy-Veech induction
Authors: Weiss Christian
Published: August 2020

The Three Gap Theorem states that there are at most three distinct lengths of gaps if one places n points on a circle, at angles of z, 2z, … nz from the starting point. The theorem was first proven in 1958 by Sós and many proofs have been found since then. In this note we show how the Three Gap Theorem can easily be deduced by using Rauzy-Veech induction.
Minimal prime ideals of skew PBW extensions over 2-primal compatible rings
Authors: Louzari Mohamed , Reyes Armando
Published: August 2020

In this paper, we characterize the units of skew PBW extensions over compatible rings. With this aim, we recall the transfer of the property of being 2-primal for these extensions. As a consequence of our treatment, the results established here generalize those corresponding for commutative rings and Ore extensions of injective type. In this way, we present new results for several noncommutative rings of polynomial type not considered before in the literature.
On n-th roots of meromorphic maps
Authors: García Juan C. , Hidalgo Rubén A.
Published: August 2020

Let S be a connected Riemann surface and let φ: S → Ĉ bebranched covering map of nite type. If n ≥ 2,then we describe a simple geometrical necessary and sucient condition for the existence of some n-th root, that is, a meromorphic map ψ: S → Ĉ such that φ = ψn.
Extinction and survival in competitive Lotka-Volterra systems with constant coefficients and infinite delays
Authors: Montes de Oca Francisco , Pérez Liliana Rebeca
Published: August 2020

The qualitative properties of a nonautonomous competitive Lotka-Volterra system with infinite delays are studied.By using a result of matrix theory and the fluctuation lemma, we establish a series of easily verifiable algebraic conditions on the coefficients and the kernel, which are sufficient to ensure the survival and the extinction of a determined number of species. The surviving part is stabilized around a globally stable critical point of a subsystem of the system under study. These conditions also guarantee the asymptotic behavior of the system.
The Relationship between Isokinetic Trunk, Leg Strength and Isometric Mid-Thigh Pull Test, Counter Movement Jump in National Rowing Athletes
Authors: Lee Jong Baek , Kim Young Kyun
Published: August 2020

OBJECTIVES The purpose of this study was to analyze the relationship between isokinetic leg strength and maximum Isometric Med-Thigh Pull Test(IMTP) and maximum height of Counter Movement Jump (CMJ) in Korean national rowers.METHODS Each eight male and female athletes were participated in the study. Isometric IMTP, CMJ, and isokinetic trunk, hip, and knee strength were measured to analyze the relationship between the IMTP, CMJ and isokinetic strength. The correlation between variables was analyzed by the step-wise method of multiple regression analysis after analyzing the correlation between dependent and independent variables.RESULTS Knee, Hip and trunk isokinetic flexion and extension strength showed high correlation with maximum IMTP with the all participants. Knee extension and trunk flexion isokinetic strength showed higher correlation with IMTP. Knee extension isokinetic strength showed high correlation with CMJ.CONCLUSIONS For strengthening exercise of National rowers, ipsilateral strength balance and agonistantagonist strength balance of leg and trunk should be considered to improve performance efficiently.
Effects of Vastus Lateralis Muscle Fascicle Length on Isokinetic Muscular Strength and Physical Fitness in Collegiate Athletes
Authors: Lee Kwang-Jin , Lee Ho-Seong
Published: August 2020

OBJECTIVES The purpose of this study was to examine the effects of vastus lateralis muscle fascicle length on isokinetic muscle strength and physical fitness in collegiate athletes.METHODS 32 male collegiate athletes were classified into short fascicle length group (SFG, n=16) and long fascicle length group (LFG, n=16) by ultrasonic imaging. Both groups were tested for isokinetic muscular strength (peak torque, angle of peak torque and time to peak torque) and physical fitness (20 m sprint, T-drill, reaction time, side hop, square hop, figure of 8 hop, sergeant jump and Y-balance).RESULTS LFG showed a positive effect on pennation angle (p=.001), fascicle length (p=.001), angle of peak torque at 180°/sec (p=.037), time to peak torque at 90°/sec and 180°/sec (p=.036; p=.039), 20 m sprint (p=.016), T-drill (p=.005), side hop (p=.001) and square hop (p=.001), respectively compared to SFG. However, there was no difference between both groups of peak torque at 30°/sec, 90°/sec and 180°/sec, angle of peak torque at 30°/sec and 90°/sec, time to peak torque at 30°/sec, reaction time, sergeant jump and Y-balance.CONCLUSIONS These results found that long fascicle length of vastus lateralis muscle have excellent isokinetic muscle strength and physical fitness in collegiate athletes.
Experiências de atendimento à saúde de imigrantes bengaleses entre trabalhadores da atenção primária à saúde no Paraná, Brasil
Authors: Delamuta Karly Garcia , Mendonça Fernanda de Freitas , Domingos Carolina Milena , Carvalho Marselle Nobre de
Published: August 2020

Resumo: O objetivo deste trabalho foi analisar as experiências de atendimento à saúde de imigrantes bengaleses entre trabalhadores da atenção primária em saúde no Paraná, Brasil. Trata-se de um estudo qualitativo realizado em uma unidade básica que tem aproximadamente 700 bengaleses residindo em sua área de abrangência. O estudo foi desenvolvido em um município de médio porte localizado na região norte do Paraná. A produção de dados aconteceu por meio de entrevistas semiestruturadas com os trabalhadores de saúde. Os dados foram analisados sendo respeitados todos os aspectos éticos. Os resultados revelaram que a aparência e o idioma dos imigrantes afetam a forma de atendimento dos trabalhadores. Por conta disso, foi possível verificar uma série de implicações nas ações e serviços ofertadas a essa população, tais como: o uso do protocolo, mesmo este não atendendo às necessidades específicas dos imigrantes; a suposição dos motivos e das necessidades de procura da população imigrante pelos serviços de saúde; e a omissão na realização de algumas ações. Diante disso, a população de bengaleses acessa os serviços de atenção primária à saúde muito mais pela sua habilidade de adaptação do que pela capacidade dos trabalhadores de ofertarem uma assistência de acordo com as suas necessidades. Portanto, é necessário olhar de forma especial para os trabalhadores que estão inseridos nessa situação e pensar que formas de apoio podem ser ofertadas a uma equipe de saúde que lida cotidianamente com populações imigrantes.
Occurrence of green tobacco sickness and associated factors in farmers residing in Dom Feliciano Municipality, Rio Grande do Sul State, Southern Region of Brazil
Authors: Campos Élida , Costa Vanessa Indio-do-Brasil da , Alves Sérgio Rabello , Rosa Ana Cristina Simões , Geraldino Bárbara Rodrigues , Meira Beatriz da Cruz , Cunha Valéria , Cavalcante Tânia Maria , Turci Silvana Rubano , Sarpa Marcia , Otero Ubirani Barros
Published: August 2020

Abstract: This study aimed to evaluate the occurrence of the green tobacco sickness (GTS) and its associated factors in tobacco familiar farmers residing in Dom Feliciano, Rio Grande do Sul State, Brazil. A cross-sectional study was conducted evaluating the sickness in 354 small tobacco farmers, between October 2011 and March 2012. The urinary concentration of cotinine, a biomarker of exposure to nicotine, was determined during the tobacco harvest period. Subjects presenting cotinine urinary levels ≥ 50ng/mL, that had contact with tobacco leaves up to 48 hours before the sample collection and reported at least one disease symptom were deemed as cases. A non-conditional logistic analysis was performed to evaluate the association between GTS and the population characteristics. A total of 122 (34.5%) cases were identified, with 39% of them being smokers and 61% being males. The median cotinine urinary concentrations were 75.6ng/mL (74.1ng/mg of creatinine) for non-cases and 755.8ng/mL (632.1ng/mg of creatinine) for the cases (p-value ≤ 0.01). The multivariate analysis showed a positive association between GTS and sunlight exposure time, exposure to pesticides, worse health status, and inverse association with wood cultivation. This study presented a high GTS prevalence and suggest that the use of urinary cotinine is a significant biomarker to determine GTS cases, influencing in the distribution by sex. Once the tobacco production involves health hazards, is important to implement measures to prevent the harm caused to tobacco farmers, as set in articles 17 and 18 of the World Health Organization Framework Convention on Tobacco Control.