bluuebunny/crossref_metadata_2025 huggingface dataset:
Semiparametric Inference for Proportional Mean Past Life Model
Authors: Mansourvar Z. , Asadi M.
Published: May 2019

The mean past lifetime provides the expected time elapsed since the failure of a subject given that he/she has failed before the time of observation. In this paper, we propose the proportional mean past lifetime model to study the association between the mean past lifetime function and potential regression covariates. In the presence of left censoring, martingale estimating equations are developed to estimate the model parameters, and the asymptotic properties of the resulting estimators are studied. To assess the adequacy of the model, a goodness of fit test is also investigated. The proposed method is evaluated via simulation studies and further applied to a data set.
Adaptive Automatic Voltage Regulation in Rural 0.38 kV Electrical Networks
Authors: Vinogradov Aleksandr , Vinogradova Alina , Golikov Igor , Bolshev Vadim
Published: May 2019

Development of smart grids for power supply to rural consumers assumes the creation of adaptive voltage regulation systems in 0.38 … 10 kV electrical networks as one of the directions. This paper considers a new approach to create an algorithm for controlling the technical means of regulation and voltage stabilization. The proposed adaptive voltage regulation system allows collecting and processing information on the actual voltage at the consumer inputs and automatically determine the voltage regulation coefficient. The developed mathematical model allows calculating the voltage regulation coefficient depending on the voltage at various points of the 0.38 kV electric network. In the paper there are also new methods of adaptive automatic voltage regulation in the 0.38 kV electrical networks and the requirements to the functional capabilities of this system. The article suggests technical solutions for the implementation of adaptive automatic voltage regulation system. The successful tests of experimental model of this system have been carried out.
On the generation of Coxeter groups and their alternating subgroups by involutions
Authors: Yu Rupert W. T.
Published: May 2019

In this note, we determine the minimum number of involutions required to generate a finite irreducible Coxeter group, and also whenever such generation is possible, its alternating subgroup.
Explicit generators are given.
Performance Analysis of a Non-Hermitian OFDM Optical DQPSK FSO Link over Atmospheric Turbulent Channel
Authors: Islam M. Shariful , Majumder S. P.
Published: May 2019

A free-space optic (FSO) system model considering non-Hermitian orthogonal frequency division multiplexing (OFDM) modulation followed by optical differential quadrature phase shift keying (DQPSK) modulation is proposed. Analysis is presented for an OFDM-DQPSK FSO link considering an optical direct detection receiver based on dual detection optical QPSK demodulator. Analytical approach is developed to find the expressions for output current and signal to noise ratio (SNR) in presence of atmospheric turbulence. The conditional bit error rate (BER) for a given turbulence-induced fading is also derived. Average SNR and BER are obtained considering the turbulence-induced fading to be log-normal distribution. Results are evaluated in terms of average SNR and BER for different link distances, number of OFDM subcarriers, background current and different wavelengths. It is noticed that the proposed OFDM FSO system suffers 4 and 1.4 dB power penalty at a BER of 10−12 due to the effect of atmospheric turbulence and background radiation respectively for 512 number of OFDM subcarrier and link distance of 2,000 m. Comparison of the results is made with simulation results as well as experimental results reported earlier. The proposed OFDM FSO system provides better performance, with an almost 3 dB improvement in receiver sensitivity compared to the experimental results on OFDM-QPSK FSO link reported earlier at a BER of 10−6. Finally, the analytical results are verified by numerical simulation.
On Partitions and Arf Semigroups
Authors: Tutaş Nesrin
Published: May 2019

In this study we examine some combinatorial properties of the Arf semigroup. In previous work, the author and Karakaş, Gümüşbaş defined an Arf partition of a positive integer n. Here, we continue this work and give new results on Arf partitions. In particular, we analyze the relation among an Arf partition, its Young dual diagram, and the corresponding rational Young diagram. Additionally, this study contains some results that present the relations between partitions and Arf semigroup polynomials.
Arithmetic properties for Andrews’ (48,6)- and (48,18)-singular overpartitions
Authors: Liu Eric H. , Du Wenjing
Published: May 2019

Singular overpartition functions were defined by Andrews. Let Ck,i(n) denote the number of (k, i)-singular overpartitions of n, which counts the number of overpartitions of n in which no part is divisible by k and only parts ±i (mod k) may be overlined. A number of congruences modulo 3, 9 and congruences modulo powers of 2 for Ck,i(n) were discovered by Ahmed and Baruah, Andrews, Chen, Hirschhorn and Sellers, Naika and Gireesh, Shen and Yao for some pairs (k, i). In this paper, we prove some congruences modulo powers of 2 for C48, 6(n) and C48, 18(n).
A severe complication of myocardial dysfunction post radiofrequency ablation treatment of huge hepatic hemangioma: a case report and literature review
Authors: Gao Jun , Xu Li , Yang Meng-meng , Ke Shan , Ding Xue-mei , Wang Shao-hong , Sun Wen-bing
Published: May 2019

In recent years, radiofrequency (RF) ablation has been increasingly used for treating hepatic hemangiomas attributing to its unique advantages, such as minimal invasiveness, definite efficacy, high safety, fast recovery, and wide applicability. However, complications related to RF ablation had been frequently reported, especially while being used for treating huge hemangioma (≥10 cm). Cautious measures had been taken to prevent the incidence of ablation-induced complications, but still unexpected complications occurred. Herein we reported a case of severe myocardial dysfunction along with systemic inflammatory response syndrome occurring immediately post RF ablation of a 10.7 cm hemangioma. This serious complication was effectively managed by supportive care with the full recovery in a short period of time.
1.5 μm photoluminescence and upconversion photoluminescence in GeGaAsS:Er chalcogenide glass
Authors: Prokop Vit , Strizik Lukas , Oswald Jiri , Vlcek Milan , Benes Ludvik , Yannopoulos Spyros N. , Frumarova Bozena , Wagner Tomas
Published: May 2019

The paper reports on ≈1.5 μm Stokes photoluminescence (PL) emission and upconversion photoluminescence (UCPL) emission in the visible and near-infrared spectral region in Er3+-doped Ge25Ga8As2S65 chalcogenide glasses at pumping wavelengths of 980 and 1550 nm. The ≈1.5 μm PL emission spectra are broadened with increasing concentration of Er ions which is discussed in terms of radiation trapping and UCPL dynamics affecting the Er3+: 4
I
13/2 level lifetime. The UCPL emission was observed at ≈530, ≈550, ≈660, ≈810 and ≈990 nm and its overall intensity as well as red-to-green UCPL emission intensity ratio increases with increasing Er concentration. To explore the UCPL dynamics we measured double logarithmic dependency of green (≈550 nm) and red (≈660 nm) UCPL emission versus pump power at pumping wavelength of 975 nm. Moreover, we measured quadrature frequency resolved spectroscopy (QFRS) on green UCPL emission (≈550 nm) using 975 nm pumping wavelength and various excitation powers. The QFRS spectra on green UCPL were analyzed in term of QFRS transfer function for three-level model from which we deduced energy transfer upconversion rate w
11 (s−1) originating from Er3+: 4
I
11/2, 4
I
11/2→4
F
7/2, 4
I
15/2 transitions.
Focus Fronting in Spanish: Mirative implicature and information structure
Authors: Cruschina Silvio
Published: May 2019

In Romance, Focus Fronting (FF) is generally related to a contrastive or corrective function. In this paper, I show that Spanish may resort to FF to express a special evaluative meaning, namely, a mirative (conventional) implicature of surprise and unexpectedness. Mirative FF is problematic for the traditional analyses of FF because it is not necessarily contrastive and does not guarantee the traditional articulation of the sentence into a new and a given part. The results of a syntactic experiment on the distribution and interpretation of FF in European Spanish show that speakers accept FF not only in the corrective but also in the mirative context. The acceptability of mirative FF thus proves that FF in Spanish is not exclusively limited to contrast or linked to information-structural requirements such as the new-old information distinction. FF may also be used to express a mirative implicature that requires a set of focal alternatives in order to be interpreted correctly.
Kalibrierfreie 3D-Rekonstruktion von gekrümmten Oberflächen mittels orthographischer Projektion unter Verwendung von Reflexionsmarkern
Authors: Negara Christian , Längle Thomas , Beyerer Jürgen
Published: May 2019

Die optische Vermessung gekrümmter Oberflächen erfolgt meist über problemspezifische Messverfahren und Algorithmen zur 3D-Rekonstruktion, die an die optischen Eigenschaften der zu untersuchenden Oberfläche angepasst sind. In diesem Artikel wird ein Verfahren zur 3D-Rekonstruktion von Freiformflächen vorgestellt, das das Oberflächenrelief in einem telezentrischen Strahlengang mit einer telezentrischen Abbildungsoptik und einer koaxialen telezentrischen Beleuchtung erfasst. Die untersuchte Oberfläche des Prüflings kann dabei texturiert oder untexturiert und transparent, spiegelnd oder diffus sein. Die Oberfläche wird dabei nicht direkt vermessen, sondern mittels darauf aufgebrachter retroreflektierender Marker rekonstruiert. Da zwischen den Markern keine Messwerte vorliegen, können nur Oberflächen rekonstruiert werden, die eine örtliche Glattheit aufweisen. Mit einem Verfahren für monokulares Stereo werden aus einer Bildserie simultan sowohl die Kameraposen als auch die 3D-Koordinaten der Reflexionsmarker berechnet. Die sonst übliche Kalibrierung der extrinsischen Kameraparameter entfällt. Anschließend wird eine parametrische B-Spline-Oberfläche gefittet, aus der sowohl das Oberflächenrelief als auch die Oberflächennormalen berechnet werden können.
Supramolecular assembly of two copper(II) coordination compounds of topiroxostat with dialkylformamide ligands
Authors: Jiang Li-Ting , Chang Xiang , Chen Sheng-Chun , Feng Xue-Jun , Chen Qun
Published: May 2019

A well-known selective xanthine oxidase inhibitor topiroxostat, 4-[3-(4-pyridinyl)-1H-1,2,4-triazol-5-yl]-2-pyridinecarbonitrile (ptpc), was selected to react with Cu(NO3)2 · 3H2O in dialkylformamide solvents, affording two novel supramolecular coordination compounds [Cu(ptpc)2(NO3)(DMF)2] · NO3 (1) and Cu(ptpc)2(NO3)2(DEF)2 (2). Single-crystal X-ray diffraction revealed that compound 1 crystallizes in the monoclinic space group C2/c. The components are assembled to a 3D supramolecular framework through hydrogen-bonding interactions between the large [Cu(ptpc)2(NO3)(DMF)2]+ cationic moieties and the nitrate anions. Compound 2 crystallizes in the triclinic space group P1̅ and shows a 2D hydrogen-bonded network structure. The results clearly indicate that dialkylformamide solvents with different sizes have an important influence on the structures of the complexes. The luminescence properties of 1 and 2 in the solid state and their thermal stabilities were also investigated.
Experimental Study of Residual Stresses in Hybrid Laser Arc and Submerged Arc-Welded 10-mm-Thick Low-Carbon Steel Plates
Authors: Andreassen Michael Joachim , Yu Zhenzhen , Bunn Jeffrey R. , Nielsen Jens Henrik
Published: May 2019

Offshore structures are constantly exposed to a multihazard marine environment that threatens their structural integrity. This imposes a high risk for extensive structural failures while various deterioration mechanisms may degrade the available capacity of the structures. Thus, no reliable decisions can be reached regarding design, operation, and survivability of the structures unless a deep comprehension of their fatigue performance is available, including welding-induced residual stresses. In particular, the continuous increase in size of the weldments for the offshore wind industry needs special attention with regard to welding-induced residual stresses, as they can reduce fatigue life, promote distortion, and contribute to stress corrosion cracking. Thus, the current design methods and increased structural dimensions as well as new design and manufacturing methods need to be inspected, understood, and optimized. Related to this, there is a growing need for evaluation of the effect of welding methods with various heat input density distributions. This article deals with the influence of welding method on the welding-induced residual stresses in 10-mm-thick low-carbon structural steel plates. The residual stresses are investigated in hybrid laser-arc welded and submerged arc butt-welded steel plates by means of experimental temperature profile measurements and neutron diffraction measurements and in accordance with existing production procedures. The residual stresses were measured at three different depths in the plates. The goal of the analysis is to gain a comprehensive understanding of the distribution and development of residual stresses in relation to the welding method for better control of the residual stresses and distortion. The repeatability of the neutron diffraction measurements is also investigated and reported in this article.
Prostitutes, Trauma, and (Auto-)Biographical Narratives: Revisiting Brahms at the Fin de Siècle
Authors: McManus Laurie
Published: May 2019

Unlike Wagner, Mahler, or Schoenberg, Johannes Brahms is often absent from discussions of Viennese fin-de-siècle psychological theories and their intersections with musical culture. The privileged context depicting an aging Brahms resistant to new trends in politics and the arts discourages the notion that he would have known and been influenced by any such developments in the developing field of psychology or psychological arts. As a case study exploring Brahms’s potential engagement in these areas, this article reexamines the contested “legend” of Brahms playing piano in dive bars as an adolescent, not to determine its veracity, but in part to reveal how this motif functions in two different narrative models of Brahms biographies to about 1933. In the first model, the composer emerges spotless from the trials of a low-income childhood; in the second, however, he remains scarred by the unhealthy sexual climate of the bars. I argue that cultural-intellectual contexts in fin-de-siècle Vienna influenced Brahms’s attempts to shape his biographical narratives and that both models could have originated with Brahms himself. From Paolo Mantegazza’s sexology treatises to Hermann Bahr’s scandalous plays, the Viennese reading public was confronted with both scientific and literary material that conflated psychology, sexuality, and personal identity, while other artists such as Max Klinger sought to explore the unconscious motivations behind behaviors. In this context, we may reevaluate anecdotal evidence in which Brahms accords his adult problems to a traumatic childhood experience of playing piano in dangerous establishments: it suggests that Brahms could have taken part in fin-de-siècle trends of self-analysis and psychologized autobiography.
Expression Signatures of Cisplatin- and Trametinib-Treated Early-Stage Medaka Melanomas
Authors: Klotz Barbara , Kneitz Susanne , Lu Yuan , Boswell William , Postlethwait John , Warren Wesley , Walter Ronald B , Schartl Manfred
Published: May 2019

Small aquarium fish models provide useful systems not only for a better understanding of the molecular basis of many human diseases, but also for first-line screening to identify new drug candidates. For testing new chemical substances, current strategies mostly rely on easy to perform and efficient embryonic screens. Cancer, however, is a disease that develops mainly during juvenile and adult stage. Long-term treatment and the challenge to monitor changes in tumor phenotype make testing of large chemical libraries in juvenile and adult animals cost prohibitive. We hypothesized that changes in the gene expression profile should occur early during anti-tumor treatment, and the disease-associated transcriptional change should provide a reliable readout that can be utilized to evaluate drug-induced effects. For the current study, we used a previously established medaka melanoma model. As proof of principle, we showed that exposure of melanoma developing fish to the drugs cisplatin or trametinib, known cancer therapies, for a period of seven days is sufficient to detect treatment-induced changes in gene expression. By examining whole body transcriptome responses we provide a novel route toward gene panels that recapitulate anti-tumor outcomes thus allowing a screening of thousands of drugs using a whole-body vertebrate model. Our results suggest that using disease-associated transcriptional change to screen therapeutic molecules in small fish model is viable and may be applied to pre-clinical research and development stages in new drug discovery.
Female Genetic Contributions to Sperm Competition in Drosophila melanogaster
Authors: Chen Dawn S , Delbare Sofie Y N , White Simone L , Sitnik Jessica , Chatterjee Martik , DoBell Elizabeth , Weiss Orli , Clark Andrew G , Wolfner Mariana F
Published: May 2019

There is extensive variation in males for sperm competitive abilities, and in females for the ability to distinguish among sperm from different males. But it is still not known how females distinguish males...

In many species, sperm can remain viable in the reproductive tract of a female well beyond the typical interval to remating. This creates an opportunity for sperm from different males to compete for oocyte fertilization inside the female’s reproductive tract. In Drosophila melanogaster, sperm characteristics and seminal fluid content affect male success in sperm competition. On the other hand, although genome-wide association studies (GWAS) have demonstrated that female genotype plays a role in sperm competition outcome as well, the biochemical, sensory, and physiological processes by which females detect and selectively use sperm from different males remain elusive. Here, we functionally tested 26 candidate genes implicated via a GWAS for their contribution to the female’s role in sperm competition, measured as changes in the relative success of the first male to mate (P1). Of these 26 candidates, we identified eight genes that affect P1 when knocked down in females, and showed that five of them do so when knocked down in the female nervous system. In particular, Rim knockdown in sensory pickpocket (ppk)+ neurons lowered P1, confirming previously published results, and a novel candidate, caup, lowered P1 when knocked down in octopaminergic Tdc2+ neurons. These results demonstrate that specific neurons in the female’s nervous system play a functional role in sperm competition and expand our understanding of the genetic, neuronal, and mechanistic basis of female responses to multiple matings. We propose that these neurons in females are used to sense, and integrate, signals from courtship or ejaculates, to modulate sperm competition outcome accordingly.
Benignus multicysticus peritonealis mesothelioma
Authors: György Alpár , Schmal Ferenc , Szabó Huba , Tóth Lajos Barna , Lukovich Péter
Published: May 2019

Abstract:

Benign multicystic peritoneal mesothelioma is a rare benign tumor originating from the peritoneum, affecting mostly young, fertile women. Its presentation is non-specific, thus the final diagnosis is made after the histological examination. A young female patient presented with incarcerated inguinal hernia of which an emergency surgery was performed. During the operation a cystic mass neighboring the round ligament in the canal of Nuck was removed. No inguinal hernia was found. The histological examination confirmed the diagnosis of benign multicystic mesothelioma. The patient was referred to a center performing hyperthermic intraperitoneal chemotherapy, where laparoscopic exploration was performed. The second surgery revealed no residual tumor or any other pathology. A 41-year-old male patient, 4 years before presenting at our ward, had an elective umbilical hernia repair surgery. During the operation 2 cm big cystic mass was removed from the peritoneum, and the histological examination revealed benign multicystic mesothelioma. In 2018, acute surgery was performed due to a periappendicular abscess, while during the surgery a multicystic mass situated on the distal end of the appendix was also removed. The pathological finding confirmed the recurrence of the first tumor. The radiological examination did not find any signs of residual tumor mass anywhere else. The chances of malignant transformation in cases of benign multicystic peritoneal mesothelioma are low. The suggested treatment is en bloc surgical removal of the mass, however, in these cases recurrence is still 50%. If during follow-ups the recurrence of the tumor is found, a total peritonectomy or hyperthermic intraperitoneal chemotherapy is advisable. Orv Hetil. 2019; 160(21): 839–843.
Generalizált epilepszia hátterében azonosított ioncsatorna-génmutáció ritka formája
Authors: Till Ágnes , Szalai Renáta , Hegyi Márta , Kövesdi Erzsébet , Büki Gergely , Hadzsiev Kinga , Melegh Béla
Published: May 2019

Abstract:

The advances in molecular genetic methods has lead to the discovery of the genetic alterations that underlie the etiology of most diseases previously held to be idiopathic. Targeted genetic examination of a pediatric male patient showing a normal intellect, an extended area of skin hypopigmentation, and suffering from generalized epilepsy displaying a switch in epilepsy syndrome during the course of the disease towards a neurocutaneous syndrome was unsuccessful. Whole-exome sequencing identified a heterozygous missense mutation in a potassium chloride cotransporter gene, which together with the phenotype underscores the diagnosis of an epilepsy syndrome known in the literature as idiopathic generalized epilepsy type 14. Orv Hetil. 2019; 160(21): 835–838.
The comparative analysis of the effectiveness of stimulation of liver regeneration by bone marrow cells and total RNA of these cells
Authors: Gonikova Z. Z. , Nikolskaya A. O. , Kirsanova L. A. , Shagidulin M. Yu. , Onishchenko N. A. , Sevastianov V. I.
Published: May 2019

Extensive liver resection (ELR), performed in a number of surgical operations, refers to a critical injury, which necessitates the improvement of methods of therapy of acute post-resection liver failure.

Aim:to compare the effectiveness of stimulation of regenerative processes in the liver residue after ELR (60–70%) by intraperitoneal administration of lysed aspirate bone marrow cells (BMCs) and total RNA (tRNA) isolated from BMCs.

Materials and methods.This work was performed on 175 rats-male Wistar breed 250–300 g, on 75 of which under the inhalation anesthesia it was reproduced the model of the ELR in three groups of experiments: group 1 – control (administration of isotonic solution after ELR), group 2 – in 3–5 hours after ELR the tRNA from BMCs was intraperitoneally injected at a dose of 30 μg/100 g, group 3 – in 3–5 hours after ELR BMCs was administered intraperitoneally at a dose of 30–35 × 106cells per rat. Comparative studies of the restorative processes in the liver after the ELR in the three groups were carried out by dynamic control of the mitotic activity of hepatocytes in the liver residue, cytolytic enzymes, total bilirubin and total serum protein, as well as the liver residue (mass) weight.

Results.The tRNA from BMCs and BMCs in the indicated doses prevent the risk of the development of lethal outcomes, and also contribute to an earlier (by 10–14 days) normalization of the functional indices of hepatic homeostasis. However, the tRNA from BMCs, compared with BMCs, has a stronger stimulating effect on the recovery processes: it promotes earlier intensification of mitotic activity of hepatocytes and provides a higher rate of recovery of liver mass.

Conclusion.For the induction of recovery processes in the liver residue after ELR, the preference should be given to the tRNA from BMCs.
The influence of the ratio of liver cells and bone marrow in the implantable cell-engineering structures of the liver on the recovery efficiency of functional and morphological parameters in chronic liver failure
Authors: Shagidulin M. Yu. , Onishchenko N. A. , Krasheninnikov M. E. , Nikolskaya A. O. , Volkova E. A. , Iljinsky I. M. , Mogeiko N. P. , Sevastianov V. I. , Gautier S. V.
Published: May 2019

Aim:to determinate the most effective liver cells and multipotent mesenchymal stromal cells of bone marrow (MMSC BM) ratio into implantable cell engineering constructions (CECs) used for chronic liver failure (CLF) correcting.

Materials and methods.For creating liver CECs it was used a biopolymer implant – a composition of a heterogeneous collagen-containing gel (BMCG) (Sphero®GEL trademark) containing viable liver cells and MMSC BM in the following ratios – 1 : 1; 5 : 1 and 10 : 1 respectively. CECs with different ratios of liver cells and MMSC BM were implanted into liver of rats in which chronic liver failure (CLF), was modeled by using CCl4. The effectiveness of the regulatory effects of CECs (with different cell ratios) on regenerative processes in livers were assessed by using biochemical, morphological and morphometric methods at different periods after their implantation.

Results.Corrective effect of CECs with different cell composition on biochemical and morphological parameters of livers at chronic liver failure was established. During studying the liver CECs with various cell ratios of liver cells and MMSC BM (1 : 1; 5 : 1 and 10 : 1 respectively), it was found that the most optimal ratio of cells into the CECs is 5 : 1, because at this ratio of cells, there were a more distinct normalization of the morphological and functional liver parameters within 365 days after modeling CLF and maintenance of the structural homeostasis into the CECs. Themselves, which allows predicting their long-term regulatory effect on the liver tissue in CLF and maintaining its normal structural and functional state.

Conclusion.The effective correction of chronic liver failure can be carried out by using the implanted liver CECs, in which donor liver cells and MMSC BM where presented in ratios – 1 : 1; 5 : 1 and 10 : 1. But analysis of prolonged correction of liver morphological and functional parameters at CECs using it was allow to recommend the preferences using of CECs with ratio 5 : 1, because prolonged preservation of structural homeostasis into these CECs makes possible to prognosticate their prolonged regulatory action on the liver tissue at CLF, especially for recipients on a waiting list for liver transplantation.
Heart transplantation in a patient with primary malignant tumor
Authors: Kliver E. E. , Murashov I. S. , Volkov A. M. , Kliver E. N. , Doronin D. V.
Published: May 2019

The article looks at a clinical case of a 31-year-old female with signs of paroxysmal ventricular tachycardia and Morgagni–Adams–Stokes syndrome. In April 2014, electrophysiological examination revealed a source of ventricular tachycardia localized in the apices of the right and left ventricles of the patient. The sources were then subjected to RF ablation followed by cardioverter-defibrillator implantation. Subsequent antiarrhythmic therapy failed to improve her state. In September 2016 the patient was re-examined and underwent RF ablation of the apical region of the right ventricle. Later on, taking into account continuously recurrent life-threatening cardiac rhythm disorders, as well as unpromising strategies for further conservative treatment, she was put on the waiting list and then underwent orthotopic cardiac transplantation. Histological examination and immunohistochemistry assay showed leiomyosarcoma in the source of ventricular tachycardia previously found in the apex of the right ventricle. This clinical case demonstrates a diversity of clinical manifestations of primary malignant tumors of the heart that pose a challenge for intravital diagnostics and interpretation of a clinical picture.
The lesion of kidney glomeruli in case of polyomavirus allograft nephropathy
Authors: Motin Yu. G. , Omelchenko O. V. , Lokchin D. B. , Gappoev S. V. , Semenova E. N. , Prokchozhev A. Yu. , Yakovlev V. A. , Grigorov E. V. , Gryzlov A. Yu. , Klyuev A. L.
Published: May 2019

The article describes a case of diagnosis allograft polyomavirus nephropathy with glomerular involvement. Immunohistochemical and electron microscopic methods were used to exam the transplant kidney biopsies, which showed morphological changes in allograft, ultrastructural characteristics of polyomavirus and features of its spread in kidney tissue structures.
Defoliation, application of S-ABA and vegetal extracts on the quality of grape and wine Malbec cultivar
Authors: Pessenti Isabela Leticia , Ayub Ricardo Antonio , Botelho Renato Vasconcelos
Published: May 2019

Abstract High rainfall and low temperatures can cause grapes not to reach adequate maturation indexes. The aim of this work was to evaluate the effect of leaf removal, hormonal regulator and vegetable extracts on the quality of grape and wine. An experiment was conducted in a vineyard of Malbec cv.in southern Brazil by two consecutive seasons. Treatments were: 1) control, 2) manual defoliation in early maturation; 3) defoliation 15 days after the first defoliation; 4) S-ABA200 mg L-1; 5) S-ABA400 mg L-1; 6) S-ABA600 mg L-1. 7) vegetal Stachytarpheta cayenensis extract (100 g L-1) and 8) Cymbopogon citratus 100 g L-1. Diameter and length of canes, soluble solids, titratable acidity, anthocyanins and polyphenols in berry and wine, photosynthetically active radiation (PAR), chlorophyll index, defoliation percentage and leaf chlorosis and color index of berry skin were evaluated. Defoliation and S-ABA increased PAR. S-ABA provided leaf chlorosis and lowered the chlorophyll content, causing senescence. Defoliation and S-ABA increased the levels of total polyphenols, anthocyanins both in berry skin and wine of grapes Malbec cv. Vegetal extracts applied did not influence physical and chemical analyses, neither in anthocyanins and total polyphenols.
Postharvest quality of ‘Baigent’ apples as a function of single and multiple preharvest spray aminoetoxivinylglycine and ethephon applications
Authors: Soethe Cristina , Steffens Cristiano André , Hawerroth Fernando José , Amarante Cassandro Vidal Talamini do , Heinzen Angélica Schmitz , Stanger Mayara Cristiana
Published: May 2019

Abstract The aim of this work was to evaluate the effect of single and multiple pre-harvest spray aminoethoxyvinylglycine (AVG) applications with or without ethephon, in ‘Baigent’ apple trees cultivated under anti-hail screen and harvesting date on fruit quality after storage. The experiment was conducted in a commercial orchard in the municipality of Vacaria/RS, in the 2014/15 and 2015/16 harvests. Treatments consisted of: control (plants sprayed with water); AVG (125 mg L-1, 30 days before the predicted harvest date; BPHD); ethephon (120 mg L-1, seven BPHD); AVG (62.5 mg L-1 + 62.5 mg L-1, 30 and 20 BPHD); AVG (62.5 mg L-1 + 62.5 mg L-1, 30 and 20 BPHD) + ethephon (120 mg L-1, seven BPHD). Fruits of all treatments were harvested at commercial harvest (harvest 1) and after 14 days (harvest 2). Fruits were evaluated after four months of cold storage (0.5 °C ± 0.2 °C and RH 92 ± 5%). The use of AVG, regardless of single or multiple applications, reduced ethylene production rate, skin yellowing, farinaceous pulp and senescent degeneration incidence and maintained higher pulp firmness values and pulp penetration and skin rupture strength. Ethephon provided fruits with higher farinaceous pulp incidence. Fruit treated with AVG, regardless of single or multiple application and combination with ethephon, presents better quality after cold storage.
Análise crítica da proposta de reforma da previdência social no Brasil entre os anos 2016 e 2018
Authors: Silva Mauri Antônio da
Published: May 2019

Resumo: O objetivo geral deste trabalho foi a análise crítica da tentativa de contrarreforma da previdência que se materializou na Proposta de Emenda Constitucional n. 287/2016. A metodologia utilizada foi a pesquisa teórico-bibliográfica e o método foi o materialismo histórico. Os resultados da pesquisa mostraram que a ofensiva liberal conservadora pela retirada dos direitos previdenciários está relacionada aos interesses do capital financeiro para aumentar seus lucros à custa do Orçamento da União.
O direito constitucional ao Benefício de Prestação Continuada (BPC): o penoso caminho para o acesso
Authors: Stopa Roberta
Published: May 2019

Resumo: O BPC é o único benefício da Assistência Social garantido pela Constituição Federal de 1988 no valor de um salário mínimo mensal. Apesar de ser imprescindível na vida dos beneficiários e de suas famílias, tendo mais de 4,5 milhões de benefícios mantidos, a materialização do BPC em dois espaços (Assistência Social e INSS), a burocracia estatal, a falta de informações e, principalmente, a (i)lógica perversa dos critérios tornam penoso o caminho percorrido pelos usuários.
Trabalhador com deficiência e Previdência Social
Authors: Macêdo Alano do Carmo , Araújo Thaynah Barros de
Published: May 2019

Resumo: Este texto examina a aposentadoria do trabalhador com deficiência segurado do Regime Geral de Previdência Social. Argumenta-se que a deficiência é resultado de uma produção social da sociabilidade capitalista. As restrições e impactos no reconhecimento do direito são analisados sob o prisma de um país de capitalismo periférico e dependente marcado pela superexploração do trabalho com desestruturação das políticas sociais, mas com possibilidades de luta e resistência da classe trabalhadora.
Estado, políticas sociais e direitos sociais: descompasso do tempo atual
Authors: Chaves Helena Lúcia Augusto , Gehlen Vitória Régia Fernandes
Published: May 2019

Resumo: O artigo apresenta reflexão sobre o descompasso do tempo atual entre a perspectiva dos direitos sociais, as políticas públicas e a ação estatal. Compõe a reflexão discussão sobre os sentidos do público e a falência das políticas sociais e da sua função regulatória e protetiva, no que se refere ao enfrentamento das desigualdades sociais. O objetivo é evidenciar conquistas civilizatórias da humanidade e refletir sobre as políticas sociais, seus fundamentos e suas contradições.
A Reconceituação Latino-americana na Ditadura Brasileira: a renovação do Serviço Social gaúcho
Authors: Scheffer Graziela , Closs Thaisa , Zacarias Inez Rocha
Published: May 2019

Resumo: O artigo é fruto de pesquisa sobre o Movimento de Reconceituação Latino-Americano na Escola de Serviço Social de Porto Alegre. Discute a renovação do Serviço Social gaúcho no período ditatorial, evidenciando a constituição da vertente profissional denominada de “Reformismo Reconceituador”. Aborda a caracterização dessa vertente, a qual incidiu na articulação do Movimento de Reconceituação, a partir da realização do I Seminário Latino-Americano em Porto Alegre (1965).
Movimentos sociais no Brasil contemporâneo: crise econômica e crise política
Authors: Ferraz Ana Targina Rodrigues
Published: May 2019

Resumo: O artigo objetiva compreender os movimentos sociais no Brasil a partir da grande crise capitalista iniciada em 2008 e de suas expressões políticas mais visíveis: a organização e mobilização social em redes, fóruns e coletivos. Foram usados dados secundários (artigos científicos e jornalísticos) para mapeamento de aspectos do fenômeno. O mapeamento faz parte de um programa de pesquisa que objetiva compreender as principais tendências das recentes transformações de movimentos sociais e instituições democráticas no Brasil.
O cavaleiro andante de destemido coração: Celso Furtado e a saudade do futuro
Authors: Faleiros Rogério Naques , Felipe Ednilson Silva , Sampaio Daniel Pereira
Published: May 2019

Resumo: Celso Furtado oferece uma vasta literatura para pensar o Brasil por uma perspectiva desde a América Latina, construindo um aporte teórico marcado pela discussão do subdesenvolvimento, criatividade e dependência, que permite a avaliação crítica da realidade brasileira. A materialização de sua teoria encontra aplicação no desenho de um projeto nacional de desenvolvimento, marcado pela reflexão teórica e ação concreta, na busca de superação das amarras colocadas ao desenvolvimento brasileiro.
ENTRE A AMÉRICA LATINA E UMA PROPOSTA DE EMANCIPAÇÃO: OS CONCEITOS DE CULTURA DEMOCRÁTICA E SUJEITO NA OBRA DA ALAIN TOURAINE
Authors: Ramos Rubia de Araújo
Published: May 2019

Resumo Este artigo busca analisar contribuições de Alain Touraine para o debate amplo da democracia no contexto da modernidade radicalizada, marcada pela diversidade de movimentos sociais organizados em torno de questões identitárias. Considerando que a preocupação com a emancipação humana e com a democracia perpassa por toda a obra do autor, sua proposta de “cultura democrática”, centrada no “sujeito”, resulta de sua perspectiva em relação aos processos de modernização ocidental, que inclui seus estudos sobre América Latina e o conflito entre as duas faces opostas da modernidade - o mundo objetivo, instrumental, e o mundo subjetivo de conteúdos simbólicos. Centrado na chamada “terceira fase” do autor, o artigo busca mostrar contribuições e limites, dos dois conceitos destacados, para pensar a complexidade democrática dos dias atuais, passando pela trama existente entre a construção desses dois conceitos e as concepções do autor sobre as experiências democráticas sul-americanas.
A QUESTÃO CURDA NA GUERRA DA SÍRIA: DINÂMICAS INTERNAS E IMPACTOS REGIONAIS
Authors: Nasser Reginaldo Mattar , Roberto Willian Moraes
Published: May 2019

Resumo As características que qualificam a identidade curda são reconhecidas entre seus membros há muito tempo, mas a capacidade de constituir grupos politicamente organizados entre essa população variou ao longo da história. Para compreender a complexidade da questão curda no Oriente Médio, é preciso analisar a forma pela qual eles se organizam politicamente, levando em consideração suas ideologias, particularidades do Estado em que se encontram, e, principalmente, as tensões políticas e disputas internas de seus movimentos. Além disso, é fundamental inserir a reivindicação de autonomia dos curdos no contexto da evolução da guerra civil na Síria de modo mais amplo, por ser esse um dos principais motivos do crescente envolvimento da Turquia e das grandes potências na região.
CAMINHOS CRUZADOS: MARXISMO E NACIONALISMO NO BRASIL E NO PERU (1928-1964)
Authors: Kaysel André
Published: May 2019

Resumo Este artigo aborda as relações entre o marxismo de matriz comunista e o nacionalismo popular em dois contextos: o Brasil, entre as décadas de 1950 e 1960, e o Peru, entre 1920 e 1930. Parto da hipótese de que foram essas duas correntes ideológicas concorrentes que, no período que vai do final dos anos 1920 até a Revolução Cubana, plasmaram o universo ideológico das esquerdas latino-americanas. Procurarei demonstrar como a relação entre comunistas e nacionalistas seguiu padrões opostos nos dois casos: do conflito à aliança, no contexto brasileiro, e de uma origem comum ao antagonismo, no peruano. Explicarei esses padrões divergentes, tanto pelas diferenças entre os contextos nacionais, como pelo distinto contexto internacional, em particular no que se refere ao movimento comunista. Com essa pesquisa comparada, procuro submeter à crítica as formulações da chamada “teoria do populismo”, que procurou explicar a derrota da esquerda brasileira em 1964 pela convergência entre comunistas e nacionalistas.
PERFIL BIOQUÍMICO SÉRICO DE VACAS DAS RAÇAS NELORE E GIROLANDO CRIADAS NO ESTADO DO MARANHÃO
Authors: Conçeição Washington Luis Ferreira , Brito Danilo Rodrigues Barros , Rocha Thaís Gomes , Silva Daniela Gomes da , Chaves Daniel Praseres , Fagliari José Jurandir
Published: May 2019

Resumo O objetivo do trabalho foi avaliar a atividade sérica da aspartato aminotransferase (AST), fosfatase alcalina (ALP), creatina quinase (CK), gamaglutamiltransferase (GGT) e as concentrações séricas de albumina, bilirrubina, cálcio total e ionizado, colesterol, creatinina, fósforo, magnésio, potássio, proteína total, sódio, triglicérides e ureia de vacas das raças Nelore (n=120) e Girolando (n=120) clinicamente saudáveis, com 24 a 36 meses de idade, utilizando-se espectrofotômetro semiautomático e analisador automático de íons. A influência da raça foi verificada na avaliação da atividade da CK, cujos valores foram maiores em vacas da raça Nelore (87,5 U/L), quando comparados com aqueles de vacas Girolando (68,6 U/L). Os teores séricos de creatinina (Crea), bilirrubina total (BT), bilirrubina indireta (BI) e cálcio ionizado também foram influenciados pela raça, e os valores obtidos em vacas da raça Nelore (Crea: 1,61 mg/dL, BT: 0,28 mg/dL e BI: 0,19 mg/dL) foram superiores aos apresentados pelas vacas Girolando (BT: 1,47 mg/dL, BD: 0,23 mg/dL e BI: 0,14 mg/dL), exceto para a concentração sérica de cálcio ionizado (Nelore: 0,66 mMol/L e Girolando: 0,73 mMol/L). Os resultados obtidos evidenciaram a influência do fator racial em alguns parâmetros bioquímicos e, portanto, este deve ser levado em consideração para a correta interpretação de exames laboratoriais.
HIPOCALCEMIA EM VACAS LEITEIRAS DA AGRICULTURA FAMILIAR
Authors: Mazzuco Daiana , Bonamigo Renata , Silva Fernando Meireles da , Champion Tatiana , Franciscato Carina , Machado Luciana Pereira
Published: May 2019

Resumo O objetivo deste trabalho foi avaliar a ocorrência de hipocalcemia associada ou não a hipomagnesemia em vacas leiteiras de propriedades de agricultura familiar. Foram avaliadas 22 vacas das raças Jersey, Holandesa e Jersolando, no período de transição, oriundas de pequenas propriedades de agricultura familiar, com produção média 12L/leite/dia. A concentração do cálcio total e do magnésio séricos foi determinada por metodologia colorimétrica e cálculo do cálcio ionizado estimado a partir das concentrações séricas do cálcio total, de proteína e albumina. Foi observada hipocalcemia em 50% dos animais no pré-parto (8,2±1,4mg/dL) e 63,6% no pós-parto (7,7±1,7 mg/dL). A redução do cálcio ionizado foi menos frequente, com grande parte dos animais apresentando cálcio ionizado estimado dentro da normalidade, com média de 4,6±0,83 mg/dL no pré-parto e 4,3±1,0 mg/dL no pós-parto. Todos os animais apresentaram concentrações de magnésio sérico dentro da normalidade, descartando-se hipomagnesemia. A concentração média de magnésio no pré-parto foi 2,4±0,3 mg/dL com elevação significativa (p<0,05) no pós-parto para 2,7±0,5 mg/dL. Conclui-se que as vacas leiteiras da agricultura familiar são susceptíveis à ocorrência de hipocalcemia e a ausência de sinais clínicos pode estar relacionada à manutenção da concentração de cálcio ionizado próxima da normalidade associada à ausência de hipomagnesemia.
USE OF NEEM (Azadirachta indica) AS A SUBSTITUTE FOR ANTIMICROBIAL DRUGS IN BROILER CHICKENS’ FEED
Authors: Assunção Patricia da Silva , Mello Heloisa Helena de Carvalho , Mascarenhas Alessandra Gimenez , Andrade Maria Auxiliadora , Teixeira Karla Andrade , Oliveira Helder Freitas de , Carvalho Deborah Pereira
Published: May 2019

Abstract In the present work, we carried out an experiment aiming at evaluating the use of Neem as an antimicrobial substance in the feeds of broiler chickens. We used 240 one-day-old Cobb broiler chicks distributed in an entirely casual design, with 4 treatments, 6 repetitions and 10 birds per experimental unit, during a 21-day experimental period. Treatments consisted of a basal diet with no antimicrobial inclusion, a diet with 0.05% of tylosin, and a diet with 0.05% and 0.1% of Neem. Parameters evaluated were zootechnical performance, feed digestibility, intestinal count of Salmonella sp. and Escherichia coli, and the development of lymphoid organs. Data on the performance and metabolization of nutrients were subjected to an ANOVA and averages were compared with a post-hoc Tukey test considering α=0.05. Data on E. coli counts were analyzed with a Kruskal-Wallis test. Neem did not influence performance variables. The metabolization coefficient of dry matter and feed ethereal extract was better with tylosin (P<0.05). No growth of Salmonella was observed during the experiment. The use of Neem did not reduce E. coli population and had no influence on lymphoid organs' weight. Therefore, Neem had no effect on the performance, digestibility and intestinal microbiota of birds up to 21 days old.
Phytoplankton scenario and microcystin in water during extreme drought in semiarid tropical water supplies, Northeastern Brazil
Authors: Rego A. H. G. , Rangel-Junior A. , Costa I. A. S.
Published: May 2019

Abstract The objective of this study was to characterize the limnological, microystin and phytoplankton community of five tropical eutrophic reservoirs located in the Brazilian northeastern semi-arid region, used for domestic use at the time of extreme drought and reduction of water volume. The study was conducted in July and August 2015, and an integrated sample of the water column was collected at three points near the dam in each reservoir. Analysis of limnological parameters, identification and quantification of phytoplankton, with emphasis on cyanobacteria were performed, as well as detection of microcystin by means of immunoassay (ELISA). The reservoirs presented ~ 90% water volume reduction. High turbidity and concentrations of nitrogen and phosphorus, as well as high cyanobacterial densities, revealed an increase in the eutrophic state for hypereutrophy. The total biovolume of phytoplankton and cyanobacterial density is high, plus an average increase in relation to previous studies of 350% and 150%, respectively. The density of cyanobacteria and microcystin concentration presented values above acceptable levels for drinking water according to Brazilian legislation. A phytoplankton community was represented by 17 functional groups, including potentially toxic cyanobacteria species such as Planktothrix agardhii (S1), Microcystis aeruginosa (M), Anabaena planktonica e Anabaena spp. (H1), Cylindrospermopsis raciborskii (Sn). Our results confirm that conditions of extreme drought and reduction of the volume of the reservoirs influence the composition, biovolume of phytoplankton and water quality, but not the increase of total microcystin in the analysed, although above 1μg-1 registered a significant decrease of water quality in used for human consumption.
Adaptation of plants to high-calcium content kart regions: possible involvement of symbiotic microorganisms and underlying mechanisms
Authors: Li F. , He X. , Tang M. , Tang X. , Liu J. , Yi Y.
Published: May 2019

Abstract Rhizosphere microorganisms and endophytes can help their hosts absorb nutrients and regulate the levels of plant hormones. Moreover, they can modulate the expressions of host genes, assist hosts in eliminating reactive oxygen species (ROS) and secreting volatile organic compounds. Therefore, rhizosphere microorganisms and endophytes are considered as determinant factors driving processes involved in the growth of host plants. However, the physiological and ecological functions, as well as the molecular mechanism underlying the behavior of rhizosphere microorganisms and endophytes in their role in the adaptive capacity of host plants in the karstic high-calcium environment have not been systematically studied. This review summarizes the physiological and molecular mechanisms of rhizosphere microorganisms and endophytes which help host plants to adapt to various kinds of adverse environments. The adaptive capacities of plants growing in adverse environments, partly, or totally, depends on microorganisms co-existing with the host plants.