bluuebunny/crossref_metadata_2025 huggingface dataset:
Cytotoxic effect of natural cuttlefish bone xenograft: an  in vitro  and  in vivo  study
Authors: Irianto Komang Agung , Limbong Suyenci
Published: July 2020

BACKGROUND Commercialized synthetic bone grafts are commonly used to replace the bone defect. Cuttlefish bone is naturally available and widely studied, but the specific cytotoxicity test has not been conducted. This study aimed to evaluate the cytotoxicity of the xenograft compared to commercial grafts. 

METHODS We performed an in vitro test evaluating the viability of human mesenchymal stem cells (hMSCs) when cultured for 48 hours with the tested materials (cuttlefish bone graft and fabricated PerOssal®). The trypsinized mitochondrial activity of the viable hMSC was assayed based on colorimetry of the formazan color change. The tested material was considered nontoxic if >70% of the hMSCs were viable. The in vivo cytotoxic effect was evaluated by implanting the graft material in the femoral muscle of New Zealand (NZ) white rabbits. Nine rabbits were used in each test (cuttlefish bone, PerOssal®, and NaCl 0.9%). The systemic acute pyrogenic effect was evaluated based on 72 hours body weight changes and rectal temperature changes every 30 min in the first 3 hours and 72 hours post-implantation. 

RESULTS The mean percentage of hMSC viability when cultured with cuttlefish bone graft and PerOssal® was comparable (93.47% and 105.37%, respectively, p = 0.240). The in vivo cytotoxicity on NZ rabbit was similar between all tested materials, as shown by the minor changes in body weight (<10% body weight, p = 0.391) and rectal temperature (<0.5°C, p = 0.127). 

CONCLUSIONS Cuttlefish bone xenograft and fabricated PerOssal® have a similar non-cytotoxic effects on hMSCs and non-pyrogenic systemic effects on rabbits.
Improving a long-acting reversible contraception usage by understanding client perspectives
Authors: Kusumaningrum Weni , Damayanti Rita , Storey John Douglas , Yelda Fitra
Published: July 2020

BACKGROUND Despite the limited use of long-acting reversible contraception (LARC) in Indonesia, they have proven to be cost-effective in family planning programs. This study was aimed to identify the elements of ideas and views that people hold and their association with the use of LARC (intrauterine devices and implants) as a means of improving its utilization in Nusa Tenggara Barat (NTB) Province, Indonesia.

METHODS Data were derived from the Improving Contraceptive Mix Methods survey of 6,384 respondents in Bima District, Central Lombok, and North Lombok, NTB Province, in 2015. Confirmatory factor analysis was used to identify suitable elements of 19 variables and generate three ideation elements on attitude, knowledge, and interpersonal communication. Subsequently, the association of three ideation elements with LARC use in NTB was examined.

RESULTS Multivariate analysis revealed that LARC use was higher among women with a positive attitude toward LARC and high frequency of interpersonal communication. Women with positive attitudes had 7 times greater odds of using LARC than women with negative attitudes (adjusted odds ratio [aOR] = 7.18; 95% confidence interval [CI] = 6.09–8.55). Women with a high frequency of interpersonal communication were 2.4 times more likely to use LARC than women with low communication frequency (aOR = 2.40; 95% CI = 1.94–2.99).

CONCLUSIONS To increase the use of LARC in NTB, family planning programs should not only focus on improving women’s knowledge but also prioritizing the promotion of positive attitudes toward LARC and facilitating interpersonal communication.
The implementation of health  istithaah  to the pilgrims with tuberculosis: a cross-sectional study in Jakarta, Indonesia
Authors: Mas'ud Ibnu , Nasir Ujainah Zaini , Pitoyo Ceva Wicaksono , Rinaldi Ikhwan
Published: July 2020

BACKGROUND Based on the regulation of the Indonesian Ministry of Health No. 15 of 2016 about health istithaah for the Hajj, patients with tuberculosis (TB) can be categorized into ineligible or temporarily ineligible pilgrims. This study aimed to know the characteristics of pilgrims with TB and determined their level of fitness for fulfilling the health istithaah. METHODS A cross-sectional study of pilgrims from Jakarta who were receiving TB treatment during the Hajj in 2018 was conducted with consecutive sampling. The secondary data was collected from the Hajj Integrated Computer Health System 2018, TB registered form, and six-minute walk test (the fitness level data) conducted by the District Hajj Health Team at district health centers in DKI Jakarta and Pondok Gede before the Hajj embarkation in June–July 2018. The questionnaire to the Indonesian Hajj Health Team during pilgrimage was also included as additional data. RESULTS Thirty-one pilgrims received TB treatment and completed the intensive phase of TB treatment, but 29 pilgrims had no symptoms. Among them, 2 patients had MDR-TB. Most of them were male aged ≥40 years old. Twelve pilgrims with TB have a sufficient fitness. All pilgrims were able to run the pillars of the Hajj. CONCLUSIONS Pilgrims with TB, including MDR-TB, who had completed the intensive phase with a negative sputum smear test were declared eligible for the Hajj with assistance.
Factors associated with outcome of acute encephalitis in children: a retrospective study of three referral hospitals
Authors: Santoso Lucyana Alim , Widodo Dwi Putro , Munasir Zakiudin
Published: July 2020

BACKGROUND Encephalitis is more frequent in children and has a poor outcome. There was no data on encephalitis in children in Indonesia, so this study was aimed to evaluate clinical presentation and diagnostic examination of children with acute encephalitis, and factors related to outcome.

METHODS This was a retrospective study of medical records between 2014 and 2018 in three referral hospitals in Jakarta and Tangerang. Clinical presentation at admission, cerebrospinal fluid analysis, neuroimaging, and electroencephalography (EEG) were documented. Outcome was determined at hospital discharge and classified as poor for severe neurological abnormalities at discharge or died. Logistic regression was used to evaluate associated factors with the outcome.

RESULTS A total of 190 children were included and most were age >1 year (71%). Most subjects presented with fever (90%) and seizures (87%). Of those who had seizures, 80% experienced generalized seizures. Focal neurological deficit was seen in 90 patients (47%). EEG was positive in 90% subjects (n = 27/30). Probable cases were found in 51% of all subjects. The mortality was 23%. Focal seizures (odds ratio [OR] = 3.305, 95% confidence interval [CI] = 1.122–9.742) and age >1 year (OR = 3.076, 95% CI = 1.388–6.803) were risk factors for a poor outcome.

CONCLUSIONS Acute encephalitis occurred most often in children aged >1 year. Fever and seizures were the most common symptoms. EEG was better than other examinations for confirming diagnosis of encephalitis. Focal seizures and age >1 year were associated with a three-fold increased risk for a poor outcome.
Risk factors for asthma exacerbation among Hajj pilgrims: a case study from DKI Jakarta, Indonesia
Authors: Saifuddin Anshari , Nasir Ujainah Zaini , Rengganis Iris , Shatri Hamzah
Published: July 2020

BACKGROUND Hajj pilgrims are prone to asthma exacerbation because of the high transmission rate of respiratory infections, severe environmental factors, and high-intensity activities during the Hajj. Well-controlled asthma status and preventive efforts prior to the Hajj could reduce such exacerbations. This research aimed to determine the risk factors of asthma exacerbation during the Hajj to help establish preventive measures.

METHODS Participants were evaluated at community health centers (puskesmas) through history taking, physical examination, and spirometry. The risk factors examined included a history of exacerbation one year before the Hajj, obesity, comorbidities (e.g., diabetes mellitus, hypertension, coronary heart disease), lung function, smoking, fitness level, and influenza vaccination. Asthma exacerbation while in Saudi Arabia was determined through direct observations by authors and physicians assigned to Hajj pilgrim groups and analysis of data obtained from questionnaires distributed to the pilgrims before their departure. Odds ratios (OR) were calculated using logistic regression.

RESULTS Among 68 pilgrims with asthma, exacerbation occurred in 27 (40%) pilgrims. Risk of asthma exacerbation was significantly increased in the pilgrims with a history of exacerbation one year before the Hajj (OR = 4.27; 95% confidence interval [CI] = 1.156–15.829; p = 0.029) and obesity grade II (OR = 4.02; 95% CI = 1.151–14.097; p = 0.029). Other factors, including smoking, comorbidities, lung function, fitness level, obesity grade I, and influenza vaccination, were not significantly related to exacerbation.

CONCLUSIONS Obesity grade II and history of asthma exacerbation one year before the Hajj are strong factors for asthma exacerbation during Hajj pilgrims.
Deep-learning-based single-photon-counting compressive imaging via jointly trained subpixel convolution sampling
Authors: Li Wen-Cheng , Yan Qiu-Rong , Guan Yan-Qiu , Yang Sheng-Tao , Peng Cong , Fang Zhe-Yu
Published: July 2020

The combination of single-pixel-imaging and single-photon-counting technology can achieve ultrahigh-sensitivity photon-counting imaging. However, its applications in high-resolution and real-time scenarios are limited by the long sampling and reconstruction time. Deep-learning-based compressive sensing provides an effective solution due to its ability to achieve fast and high-quality reconstruction. This paper proposes a sampling and reconstruction integrated neural network for single-photon-counting compressive imaging. To effectively remove the blocking artefact, a subpixel convolutional layer is jointly trained with a deep reconstruction network to imitate compressed sampling. By modifying the forward and backward propagation of the network, the first layer is trained into a binary matrix, which can be applied to the imaging system. An improved deep-reconstruction network based on the traditional Inception network is proposed, and the experimental results show that its reconstruction quality is better than existing deep-learning-based compressive sensing reconstruction algorithms.
Bullet signature measurement with chromatic confocal sensor
Authors: Wei Hengzheng , Wang Weinong , Wang Xiaolin , Li Yiyi
Published: July 2020

A new, non-contact, three-dimensional (3D) bullet signature measuring system based on a chromatic confocal sensor is developed. The system is composed of a precision rotary table and a chromatic confocal sensor. The measurement uncertainty of the system is less than 1 µm. When measuring the surface topography of the object, the sensor acquires wavelength information reflected from the object instead of intensity information. This advantage is very suitable to bullet signature measurements. The chromatic confocal sensor works in the point measuring mode and can acquire data continuously with high speed. One round section measurement on the bullet body takes less than 1 minute.
Vertrauensbasierte Organisationen als Grundlage von erfolgreichen digitalen Plattformen für personennahe Dienstleistungen
Authors: Schultz Carsten , Hoffmann Stefan , Ferdinand Manuela
Published: July 2020

Immer mehr Unternehmen entschließen sich dazu, ihr Geschäftsmodell digital auszuweiten. Dieser Trend ist auch im Bereich der personennahen Dienstleistungen spürbar. Um Zugriff auf die digitalen Serviceangebote zu erhalten, müssen potentielle Nutzer persönliche Daten preisgeben. In vielen Fällen führt dies zu Bedenken und stellt somit ein gravierendes Hindernis für den Erfolg der Plattformen dar.

Vorliegende Studie erklärt Vertrauen als entscheidenden Faktor für den Erfolg digitaler Plattformstrategien für personennahe Dienstleistungen. Es werden Unterschiede zwischen gewinnorientierten und gemeinwohlorientierten Organisationen aufgezeigt und verdeutlicht, inwieweit eine strategische Nutzerintegration, also der Einbezug von Nutzern in den Entwicklungsprozess der Plattform und eine operative Nutzerintegration, bei der sich die Nutzer mit eigenen Ideen und Wünschen in den laufenden Betrieb der Plattform einbringen können, Einfluss auf Vertrauen und Nutzungsintention potentieller Anwender haben.

Hierzu wurde ein drei-faktorielles Online-Experiment mit den Faktoren Organisationsform, strategische Nutzerintegration und operative Nutzerintegration in einem Between-Subjects-Design durchgeführt. Es hat sich bestätigt, dass Vertrauen entscheidende Größe für die Nutzungsintention ist. Zudem hat sich herausgestellt, dass Vertrauen den Einfluss von Organisationsform und operativer Nutzerintegration auf die Nutzungsintention mediiert.

Die Ergebnisse der Studie richten sich vorrangig an Unternehmen, die sich mit der Entwicklung und Vermarktung von Plattformstrategien für personennahe Dienstleistungen beschäftigen. Solche Unternehmen erhalten hier erste wichtige Hinweise dazu, wie sie, je nach ihrer Organisationsform, diese Strategien erfolgreich umsetzen können, um so eine kritische Masse an Anwendern ihrer Plattform zu erreichen.
Performance and the philosopher’s costume: Richard Shusterman as the Man in Gold
Authors: Mullis Eric
Published: July 2020

This article discusses philosopher Richard Shusterman’s artistic collaboration with Yann Toma which entails the use of costume, photography and public performance. The project advances the interdisciplinary field of somaesthetics and raises questions about conventions of professional philosophy, including what philosophers conventionally wear and how philosophical inquiry is advanced. Aspects of costume theory and contemporary movement performance are used to analyse Shusterman’s autobiographical methodology and the project’s performative aims.
‘Pakis from Outer Space’: Oriental postmodernity in Leigh Bowery’s performative costuming
Authors: Vranou Sofia
Published: July 2020

With his extraordinary self-styled personas, the late London-based costume designer, nightclub extravaganza and subcultural icon Leigh Bowery constantly unsettled clear divisions between fashion, performance and visual art. His performative costuming reflects in a prolific manner his hybrid aesthetic and his ability to fuse a wide range of visual elements stemming from high fashion, art, mainstream culture and underground practices that en masse render his bizarre presence highly enigmatic. Inspired primarily by the aesthetics and the representations of South Asian culture, and noticeably deviating both from the subcultural style of the early New Romantics and mainstream fashion trends, Bowery’s allegedly first performative look, the ‘Pakis from Outer Space’, integrates an array of clashing symbols and motifs in a distinctively postmodernist fashion. As fetishization of South Asian iconography, Bowery’s enactment provides a platform for deeper analysis in regard to the problems that postmodernist cultural appropriation poses for the politics of representation of the ‘exotic’, non-western other. Drawing on the discourses of postmodernism and orientalism, this article examines the visual codes of the controversial look and unfolds the ways in which by constructing a distorted and eccentric image of an inclusive South Asian identity, Bowery slips in cultural stereotyping and ethnic generalization. Although his postmodernist parodic ethos could potentially be read as an attempt to create a critical – but politically problematic – dialectical space regarding orientalist clichés, it does not only fail to deconstruct monolithic representations but, conversely, reinforces oriental banality.
Habiller l’Opéra: Costumes et ateliers de l’Opéra de Paris, Martine Kahane and Delphine Pinasa (2019)
Authors: Schinck Carole
Published: July 2020

Review of: Habiller l’Opéra: Costumes et ateliers de l’Opéra de Paris, Martine Kahane and Delphine Pinasa (2019)

Milan: Silvana Editoriale, 214 pp.,

ISBN 978-8-83664-092-8, h/bk, €30
Entrevista a Joan Olmos: “El port de València provoca unes interaccions, de necessitats i servituds, per a les quals la ciutat no està preparada”
Authors: Caparrós Gironés Pau
Published: July 2020

Joan Olmos Llorens (Massamagrell, València, 1947) és Doctor Enginyer de Camins, professor d’Urbanisme a la Universitat Politècnica de València, autor de nombrosos articles sobre la gestió i creixement de l’espai urbà i membre actiu dels moviments socials en defensa del territori. És membre del col·lectiu Terra Crítica, amb el qual manté una gran activitat en l’opinió pública sobre qüestions urbanes i mediambientals.En aquesta entrevista analitzem el creixement de València en el seu front litoral durant la segona meitat del segle XX i la relació entre la ciutat i el seu port. Parlem del desviament del riu i les seues conseqüències; del Pla Sud, que fou la base dels plans urbanístics de l’època del desenrotllisme urbà i com va condicionar les actuacions futures sobre el conjunt de l’àrea metropolitana de València. En especial, de l’afectació per a l’ordenació territorial i la preservació mediambiental de la devesa del Saler, del parc natural de l’Albufera i el conjunt de l’Horta. Debatem també sobre la relació entre el creixement i l’ordenació urbana de la ciutat i la cohabitació amb grans infraestructures, com el port de València.
Entrevista a Ernest Garcia i Joan Martínez-Alier: “Per conservar la llibertat hem d’aprendre a deixar de creure en l’abundància i el creixement econòmic”
Authors: Requena-i-Mora Marina , Faus-Bertomeu Aina
Published: July 2020

El creixement econòmic ha produït canvis en el metabolisme social. L’extracció i ús de recursos naturals i les deixalles, emanacions o residus estan generant cada vegada més conflictes socioambientals i ecològic-distribuïts, tant a escala global com a escala local. Tanmateix, els recursos s’estan exhaurint i cada vegada es fa més evident que la premissa de conciliar creixement econòmic i protecció del medi ambient no és, ni serà, realitzable. Això ha produït canvis i polaritzacions en la consciència col·lectiva. Per una banda, hi ha reaccions del tipus negacionisme extrem i de destrucció ambiental. I, per altra, reaccions de col·lapse. Conversem amb Joan Martínez-Alier, catedràtic i investigador a l’Institut de Ciència i Tecnologia Ambientals (Universitat Autònoma de Barcelona), i Ernest Garcia i Garcia, catedràtic i investigador a l’Estructura de Recerca Interdisciplinar en Sostenibilitat (Universitat de València).
Antioxidant, Antimicrobial, Molecular Docking Studies of
Novel 2,6-bis(1,3-Thiazol-2-yl)-4-(3,4,5-trimethoxyphenyl)pyridine and
its Cu(II) and Ni(II) Complexes
Authors: Sunitha Madavi , Venkateshappa G. , Ramesh G. , Kengaiah Jayanna , Shivaraja G. , Chandramohan Vivek , Prakash M. Shet , Shivananda M.K.
Published: July 2020

In the present study, a novel ligand 2,6-bis(1,3-thiazol-2-yl)-4-(3,4,5-trimethoxyphenyl)pyridine and
its Cu(II) and Ni(II) complexes were synthesized. All the synthesized compounds have been
characterized by 1H & 13C NMR, mass, UV, FT-IR and ESR spectra. The antioxidant activity of the
ligand and its Cu(II) and Ni(II) complexes were evaluated by the percentage of inhibition of 1,1-diphenyl-
2-picryl hydrazyl (DPPH) and compounds found to be potent antioxidants. Also, synthesized compounds
showed a mild antimicrobial activity in comparison with standard drugs. Copper(II) complexes showed
a good antimicrobial activity than the parent ligand and nickel(II) complex. Interestingly, ligand and
its metal complexes exhibit non-toxicity as they did not cause any effect to human erythrocyte.
An Efficient And Catalytically Free Chemical Transformation of Pyrimidin-2(1H)-one to
2-(N-Arylamino)pyrimidines and their in vitro Cytotoxicity Evaluation
Authors: Chandrani Jeenkal P. , Ganatra Kalpesh J.
Published: July 2020

With the aim to develop an efficient strategy to synthesize pyrimidine derivatives bearing diversely
substituted amines involves four step linear protocols started with Biginelli multi-component reaction
leading to dihydropyrimidines which passing throug multistep sequantial process containing oxidation,
chlorination and catalytically free transformation of pyrimidin-2(1H)-one to 2-(N-arylamino)pyrimidines,
were evaluated for cytotoxicity study against human cancer lines HCT-116, Hep-G2 and QG-56. Compound
4j exhibit significant anticancer activity showed against: human hepato carcinoma (Hep-G2) and human
colon carcinoma (HCT-116) serve as a excellent lead molecule for the generation of various promising
targets.
INTERLANGUAGE PARALLELS IN RUSSIAN AND BULGARIAN LEGAL TERMINOLOGY
Authors: Barabash Olga
Published: July 2020

Formally identical terminological units belonging to related languages can demonstrate both coincidence and divergence in semantics and stylistic correlation - due to linguistic reasons, as well as extralinguistic factors generated by the legal processes of a particular state. All this complicates the legal translation procedure, which means that it requires a detailed legal and linguistic analysis of such units.

The article provides rationale for the systematization and comprehensive description of formally matching interlanguage correspondences of Slavic and non-Slavic origin, in which at least one lexical unit belongs to the legal terminology of the Russian or Bulgarian language. The terminological pairs with the same plan of expression identified and equally expressed in the modern Russian and Bulgarian legislation are placed on a scale of semantic correspondences as follows: zero (false) semantic equivalence - partial semantic similarity - full semantic equivalence.

It is noted that particular difficulties can be correlated with the translation of formally identical terms-derived words that arose from the same elements based on the same word-formation model, as this makes their semantic mismatch not so obvious. The analysis of specific examples demonstrates that in closely related languages different units of parallel intralinguistic synonymic series can be codified, and therefore ignoring aspects of the word's functioning in the language leads to lexical and semantic interference in translation.

The author concludes that a comparative study of interlanguage parallels in Russian and Bulgarian legal terminology is important for solving problems of lexicography and legal translation.
Imaging recent to very remote object-in-place memories in the medial temporal lobe and prefrontal cortex
Authors: Atucha Erika , Fuerst Celia , Sauvage Magdalena
Published: July 2020

Studies on patient H.M inspired many experiments on the role of the hippocampus and the neocortex in retrieving recent and remote memories. Cortical regions become increasingly engaged for memory retrieval over time, while conflicting results emerge regarding the engagement of the hippocampus, suggested to be ongoing by some or restricted to the retrieval of recent memories by others. In the study of Lux et al, 2016 we tested that this discrepancy might stem from failing to dissociate CA1 from CA3s contribution to memory retrieval over time as CA3 is known to support computations more sensitive to time than CA1. We also reported that parahippocampal cortical areas with tied anatomical connections with the hippocampus were increasingly engaged over time (Lux et al.,
elife, 2016). This study used a fear conditioning paradigm as emotionally arousing experiences are better remembered than memories devoid of fear content. Here we address whether the differential contribution of brain regions is a general mechanism also subserving memory retrieval devoid of fear content. We succeeded in developing an object-in-place task to investigate remote memory retrieval up to 6 months and the contribution of CA1, CA3, parahippocampal and prefrontal cortical areas to the retrieval of recent versus very remote memories using a high resolution molecular imaging technique based on the detection of the IEG RNA Arc. Preliminary results show that the disengagement of CA3 and persistent engagement of CA1 seem to be a general mechanism in supporting retrieval of remote memory for events.
Differences in Quality of Life of Stunting Children based on Caries Status in Indonesia
Authors: Husain Akbar Fuad , Pratwi Rini , Hulwah Nadiah
Published: July 2020

Objective: The aim of this study was to determine the difference in quality of life of stunting children in Enrekang District based on their caries status. Material and Methods: This study was an observational analitic study with a cross sectional design, conducted in Buntu Batu, Baraka, and Malua Sub-district of Enrekang District on April 29-May 3, 2019. Height measurements, def-t/DMF-T, pufa/PUFA  assessment of stunting children 6-12 years old, and assessment of quality of life related to oral health of children 8-12 years using the CPQ questionnaire. Data were collected, 123 children suffered from stunting. Results: Based on the Mann Whitney Test, p value  < 0.05 showed that there were differences that statistically significant on def-t and pufa to quality of life of 8-10 years. The p value > 0.05 indicates that there are no significant differences in def-t/DMF-T and pufa/PUFA to quality of life of 11-12 years stunting children. Conclusion: There are differences in caries of primary teeth between stunting children aged 8 -10 years to their quality of life. At the age of 11-12 years there is no difference in caries to quality of life in Enrekang District.KeywordsCaries; Quality of life; Stunting.
Effect of Surface Treatment of Two Ceramic Materials by Er,Cr:YSGG Laser Irradiation on The Shear Bond Strength to Resin Cement “A Comparative in-Vitro Study”
Authors: Mandil Shahd Taha , Katamish Hesham , Salah Tarek
Published: July 2020

Objective: The aim of this study is to assess the effect of Er,Cr:YSGG laser on the shear bond strength (SBS) and surface topography of two CAD/CAM ceramic materials bonded with self-adhesive resin cement. Material and methods: sixty ceramic CAD/CAM discs were obtained, 30 lithium disilicate (IPS Emax) and 30 hybrid resin ceramic (Vita Enamic). The Slices were allocated into six groups (n=10) according to ceramic material and surface treatment; Group (LD-C): IPS Emax treated with 9% hydrofluoric acid(HF), Groups (LD-P1) and (LD-P2): IPS Emax treated with Er,Cr:YSGG laser with parameters 1.5 W and 2.5 W, respectively. Group (RC-C): Vita Enamic treated with 9% hydrofluoric acid (HF), Groups (RC-P1) and (RC-P2): Vita Enamic treated with Er,Cr:YSGG laser with parameters 1.5 W and 2.5 W, respectively. All samples were cemented with self-adhesive resin cement and thermocycled for 5000 cycles. The SBS was measured using a universal testing machine and the mean values (MPa) were analyzed using Two-way (ANOVA) (P ? 0.05) and Bonferroni’s post-hoc test. Results: RC-C (16.55) showed highest SBS followed by LD-C (13.79), which revealed no statistically significant difference with RC-P1 (12.33) and RC-P2 (11.2). The lowest SBS values were found with LD-P1 (2.7) and LD-P2 (2.1). SEM analysis revealed Vita Enamic to have the highest surface roughness. Fracture pattern analysis showed adhesive failure with IPS Emax groups and mixed failure with Vita Enamic groups. Conclusion: Er,Cr:YSGG laser irradiation with the parameters used did not increase SBS of IPS Emax and Vita Enamic with composite resin compared to HF acid etching.KeywordsEr,Cr:YSGG laser; Shear bond strength; Surface treatment; Ceramic materials.
Influence of the addition of glass fibers reinforcements in the flexural strength of acrylic resin
Authors: Possari João Gabriel Ezequiel , Sacorague Samia Carolina Mota , Feitosa Fernanda Alves , Penteado Marcela Moreira , Sichi Luigi Giovanni Bernardo , De Araújo Rodrigo Máximo
Published: July 2020

Objective: To evaluate the influence of glass fiber reinforcements used in nautical and sports products on the flexural strength of acrylic resin. Materials and methods: Thirty thermoactivated acrylic resin bars (25 x 10.5 x 3.3 mm) were used. The samples were shared in 3 groups: bars with no glass fiber (control group, n = 10), bars reinforced with glass fiber and 0.18 mm thickness (group F1, n = 10) and bars reinforced with glass fiber and 0.80 mm thickness (group F2, n = 10). After 48 hours, samples were submitted to compression test in order to evaluate flexural strength. Obtained data were statistically analyzed with significance level of 5 %. Results: It was observed that the use of glass fiber effectively increased the flexural strength compared to the control group; the thickness of the glass fiber, however, did not present statistical differences. Conclusion: The use of fiber glass is a simple and cost-effective alternative to improve acrylic resin performance.KeywordsFlexural strength; Water sports; Dentures.
Efficacy of diode laser and sonic agitation of Chlorhexidine and Silver-nanoparticles in infected root canals
Authors: Abdelgawad Latifa Mohamed , Asmail Niven , Latif Somia Abdel , Safaan Ali Mohamed
Published: July 2020

Objective: To assess the efficacy of agitation of chlorohexidine (CHX) and Silver nanoparticles “AgNps” with 810nm diode laser or sonic endoactivator compared to side –vented needle on infected root canals with Enterococcus “E” Faecalis biofilms. Material and Methods: Sixty-five extracted human premolars with single oval canals were instrumented by protaper system up to F3. Biofilms of E. faecalis were generated based on a previously established protocol. Two teeth were used to check the biofilm formation, then the remaining Teeth were randomly divided into three equal experimental groups according to agitation techniques used: group 1 (810 nm diode laser with 1 watt), group 2 (sonic endoactivator) and group 3 (Side vented needle). Each group was further divided into three equal subgroups according to the irrigant solution into; subgroup A: chlorohexidine, subgroup B: silver nanoparticles and subgroup C: distilled water: Confocal laser scanning microscopy “CLSM” was used to assess bacterial viability. Data were analyzed by appropriate statistical analyses with P = 0.05. Results: Regarding the activation method, all groups had a significantly high percentage of dead bacteria (P < 0.05). However, Laser was significantly the highest and Endoactivator the least (P < = 0.001). Diode laser agitation of AgNps irrigant showed the highest reduction percentage of bacteria (78.1%) with a significant difference with both CHX and water irrigation, Conclusion: Under the condition of the present study; results reinforced that laser activation is a useful adjunct, 810 nm diode laser agitation of AgNps or chlorhexidine was more effective in disinfection of oval root canals than endoactivator and side vented needle techniques.KeywordsDentinal infection; Silver-nanoparticles; chlorohexidine; agitation; Diode Laser; Sonic endoactivator.
Effect of SiO2 and Al2O3 nanoparticles on wear resistance of PMMA acrylic denture teeth
Authors: Helal Mohamed A , Yang Bin , Saad Esam , Abas Mohamed , Al-kholy Mohamed Reda , Imam Ahmad Y , Gad Mohammed M.
Published: July 2020

Objective: This study aimed to evaluate the wear resistance of acrylic denture teeth containing silicon dioxide (nano-SiO2) and aluminum dioxide (nano-Al2O3) nanoparticles. Material and Methods: Poly methyl methacrylate (PMMA) denture tooth material was used to denture tooth material was used to fabricate 84 specimens (n=10) containing nano-SiO2 and nano-Al2O3 in concentrations 0.1wt%, 0.3wt%, and 0.5wt% of acrylic powder. A two-body wear testing machine and digital microscope were used to measure the changes in weight loss and surface roughness respectively. One-way ANOVA and pair-wise Tukey’s post-hoc tests were used for data analysis (? = 0.05). Results: Nano-SiO2 modified teeth material demonstrated a significant increase in weight loss in comparison conventional artificial acrylic teeth material (p ? 0.05) while nano- Al2O3 modified teeth material demonstrated non-significant increase in weight loss except for 0.5% subgroup (p ? 0.05). There is no significant differences regarding roughness change after wear simulation among all tested groups (p > 0.05). Conclusion: Nano-Al2O3 nanoparticles exhibit less negative effect than nano-SiO2 so; it could be used with caution if necessary.KeywordsAcrylic denture teeth; Al2O3 nanoparticles; SiO2 nanoparticles; wear resistance; surface roughness.
Effect of erosive challenge and cigarette smoke on dentin microhardness, surface morphology and bond strength
Authors: Ferretti Marcela Alvarez , Theobaldo Jéssica Dias , Pereira Renata , Vieira-Junior Waldemir Francisco , Ambrosano Glaucia Maria Bovi , Aguiar Flávio Henrique Baggio
Published: July 2020

Objective: This study aimed to evaluate the surface microhardness and morphology, as well as the microshear bond strength of a self-etching adhesive (Clearfil SE, Kuraray) to eroded dentin, exposed or not to cigarette smoke. Forty dental crowns were divided into 4 groups (n = 10): no treatment (control) (C); erosion (E); erosion + cigarette smoke exposure (ES); cigarette smoke exposure (S). Samples were prepared through third molars polishing until dentin exposure, followed by crown section. Erosive cycles were performed 5 times/day for 30 s at 60 min intervals. Cigarette smoke was produced with twenty cigarettes/day, during 5 days. Microhardness was evaluated initially and after the treatments. Microshear bond strength was tested after the treatments and dentin restoration with flow composite. Failure patterns and dentin morphology was evaluated by Scanning Electron Microscopy. Microshear bond strength data was submitted to two-way ANOVA, microharness test was adjusted by gamma distribution to be a non-parametric analyses (p=0.05), and surface morphology as qualitative analyses. Loss percentage of microhardness was observed only in groups submitted to erosion. Bond strength was statistically similar between all groups. The most prevalent failure pattern was of adhesive type. Morphological analysis of dentin showed obliterated tubules in groups submitted to cigarette smoke exposure. Cigarette smoke exposure did not promote any effect in the percentage of microhardness loss, as in sound dentin as in eroded dentin. Cigarette smoke, erosion, and association of both, did not alter the bond strength of self-etching adhesives to dentin.KeywordsBond strength; Cigarette Smoke; Dental erosion; Microhardness; Self-etching adhesives.
Contamination of paper points used by students during preclinical and clinical endodontic procedures
Authors: Angarita Pilar , Angarita Karen Mercedes
Published: July 2020

Objective: To determine the presence of facultative anaerobic bacteria in the paper points used by students and to perform a pilot test to determine whether sterilization of these materials influences their absorption capacity. Material and Methods: This study consists of two phases. The first is a descriptive phase where a representative sample of paper points (n = 72) was collected from the students and information about the points was voluntarily contributed. The points were placed in saline solution after they were collected, and mechanically shaken for 60 s. Then, 300 IU of the solution was seeded on blood agar in duplicates and incubated for 5 days under anaerobic conditions. The second phase was experimental, during which five paper points of each of the existing sizes were sterilized (Numbers: 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, and 80), and their capacity to absorb water was compared with that of the control or non-sterilized points. Results: The study determined that 22% (n=16) of the points were primarily contaminated by gram-positive bacilli, followed by gram-positive cocci, among which Staphylococcus epidermidis was identified. The presence of contamination was not significantly associated with the conditions of the paper points (p > 0.05). Furthermore, no significant effect (p>0.05) on the absorption capacity of these materials was detected in the sterilization test. Conclusion: Contamination was observed in the paper points used by the students, confirming the importance of implementing sterilization protocols. The sterilization protocols implemented in this study did not affect the absorption capacity of the points.KeywordsMicrobiology, Contamination; Bacteria; Anaerobic.
Effect of Replacement of Fishmeal With Lima Bean Meal on the Zootechnical Performances of African Catfish (Clarias Gariepinus) in the Batié Sub-Division, West Region of Cameroun
Authors: Miégoué Emile , Tendonkeng Fernand , Lemoufouet Jules , Pamo Et Etienne Tedonkeng , Zebaze Pégis Davy Tagning , Njoh Nadège Elvire , Nganyo Ronald Komguep
Published: July 2020

This study was conducted to evaluate the effect of the substitution of fishmeal by Lima bean flouron the growth performance, survival rate and feed cost of Clariasgariepinusbetween March and May 2018 within the AIO ICG of the Batié District. It also aimed to contribute to the development of alternative sources of animal protein on a global scale. For this purpose, 300 fry of Clariasgariepinuswith an average weight of 3 ± 1.41g were divided into five batches and fed three times a day with rations corresponding to 5% of their ichthyobiomass. The rations R0, R25 R50, R75 and R100 respectively corresponded to the substitution rates of 0, 25, 50, 75 and 100% of fish meal by that of Lima bean. The physic-chemical characteristics of the water (pH, temperature, dissolved oxygen, nitrites and nitrates) were measured daily. The following results were obtained: The highest weight gains were obtained with the rations R25 (20.56 ± 0.40 g), R50 (20.64 ± 0.32 g), R75 (20.98 ± 0.46 g) and the lowest with the rations of R100 (16.21 ± 0.28 g). The highest average daily gain were 0.36 ± 0.02 g; 0.37 ± 0.01 g ; 0.38 ± 0.01 g respectively for the R0, R50 and R75 rations and the lowest with R100 (0.29 ± 0.01 g). The highest value of the specific growth rate (2.47 ± 0.07%) was obtained with the ration R0 and the lowest (1.61%) with the ration R100. The consumption index reached its highest and lowest values with the rations R100 (4.74 ± 0.42) and R50 (3.57 ± 0.43) respectively, compared to the value of the ration R0 (3.31 ± 0.37) for this parameter. Concerning the condition factor K, the highest value was recorded with the R50 diet (1.11 ± 0.49) while the lowest value was obtained with the R75 diet (0.95 ± 0.45). The cost of producing one kilogram of food was higher with the R25 ration (504.59 FCFA) and lower with the R100 ration (443.20 FCFA). Our results revealed that incorporating 75% Lima bean flour into the feed increases the growth performance of Clariasgariepinus fry and reduces the cost of food production.
The school of hard knocks: Pre-service teachers’ mindset and motivational changes during their practicum
Authors: Soleas Eleftherios K , Hong Ji
Published: July 2020

The mindset and motivation that teachers demonstrate are likely to influence their students’ mindset and motivation. While mindset and motivation of in-service teachers have been investigated thoroughly, the same cannot be said of pre-service teachers. Pre-service teachers’ mindset and motivation are likely developed during in-class experiences or practicum, the latter seen as the defining experience of pre-service teachers’ preparation. Understanding the changes that pre-service teachers undergo during their practicum experiences in terms of theories of intelligence, teaching efficacy, resilience, and grit is therefore crucial. This study used these constructs as examples of mindsets, self-beliefs, capacities, and personality traits. A cross-sectional design compared American and Canadian pre-practicum versus post-practicum pre-service teachers’ growth mindset and motivation and illustrated that similar effects occur across national contexts through a primarily quantitative questionnaire with open-ended questions. Triangulated statistical and thematic analyses illustrated that post-practicum students were less idealistic about the incremental nature of intelligence and reported higher resilience and a more pragmatic approach to teaching than their pre-practicum peers. The study’s findings extended other studies’ findings illustrating that changes occur specifically in teacher mindset as well as their strategies. Teacher education programs informed by these specific changes can capitalize on the pragmatic shift of teachers’ strategy selection while also coaching them to retain an incremental view of intelligence for their students’ benefit.
‘Project Piedemonte’: between the Maloti-Drakensberg and the Great Escarpment in the Eastern Cape Province, South Africa
Authors: de la Peña Paloma , Witelson David M.
Published: July 2020

A new project maps mobility patterns and social networks from prehistory to historical times in the western piedmont of the Maloti-Drakensberg, South Africa, and considers how rock art sites relate to seasonal or transhumance patterns in the region.
The Value in Science-Art Partnerships for Science Education and Science Communication
Authors: Zaelzer Cristian
Published: July 2020

Just a fraction of the scientific knowledge produced in laboratories reaches a lay audience. Most of our communication with the public gets lost in translation because of the difficulties that science communication poses to scientists. Among other obstacles, differential exposure to scientific and critical thinking, discrepancies with social narratives, and communication training based in the deficit model add on top of a practice established on avoiding emotionality. In this context, effective communication requires the use of emotions, which are crucial to establishing trust. This commentary provides a rationale for collaboration with graphic design and fine arts to use emotions in science communication and education. It starts by proposing the two-way engagement model as a replacement for the deficit model. Next, it offers a neuroscientific basis for the use of emotions in establishing trust. Finally, it finishes profiling the Convergence Initiative’s efforts to establish bridges across disciplines and communicating science with the public through art.
Secretion of parathyroid hormone may be coupled to insulin secretion in humans
Authors: Sass Marie Reeberg , Wewer Albrechtsen Nicolai Jacob , Pedersen Jens , Hare Kristine Juul , Borbye-Lorenzen Nis , Kiss Katalin , Vilsbøll Tina , Knop Filip Krag , Poulsen Steen Seier , Jørgensen Niklas Rye , Holst Jens Juul , Ørskov Cathrine , Hartmann Bolette
Published: July 2020

Objective:

Parathyroid hormone (PTH) is a key hormone in regulation of calcium homeostasis and its secretion is regulated by calcium. Secretion of PTH is attenuated during intake of nutrients, but the underlying mechanism(s) are unknown. We hypothesized that insulin acts as an acute regulator of PTH secretion.

Methods:

Intact PTH was measured in plasma from patients with T1D and matched healthy individuals during 4-h oral glucose tolerance tests (OGTT) and isoglycemic i.v. glucose infusions on 2 separate days. In addition, expression of insulin receptors on surgical specimens of parathyroid glands was assessed by immunochemistry (IHC) and quantitative PCR (qPCR).

Results:

The inhibition of PTH secretion was more pronounced in healthy individuals compared to patients with T1D during an OGTT (decrementalAUC0–240min: −5256 ± 3954 min × ng/L and −2408 ± 1435 min × ng/L, P = 0.030). Insulin levels correlated significantly and inversely with PTH levels, also after adjusting for levels of several gut hormones and BMI (P = 0.002). Expression of insulin receptors in human parathyroid glands was detected by both IHC and qPCR.

Conclusion:

Our study suggests that insulin may act as an acute regulator of PTH secretion in humans.
Predicting Value of Growth Differentiation Factor 15 and Its Correlations With Atrial Fibrillation
Authors: Zhou Jing , Kang Zhefeng , Liu Lulu , Guo Yingqiang , Chen Sai
Published: July 2020

Aims: Despite several clinical risk factors for atrial fibrillation (AF), some newly identified biomarkers may also potentially serve as risk factors for AF. However, none of these factors so far have been adopted in clinical practice. Recently, a number of studies with an attempt to identify the role of growth differentiation factor 15 (GDF-15) in AF have obtained ambiguous results. We try to identify the predicting role of GDF-15 in AF and AF-related complications with meta-analysis or systematic analysis.
Methods and results: We enrolled 10 studies, looking at the predicting role of GDF-15 in non-valvular AF using meta-analysis, summarized its role in AF-related major complications, and discussed whether it was dependable to forecast postoperative AF. It turned out that GDF-15 is an independent factor to predict occurrence of AF, while it remains obscure to directly demonstrate its relationship with postoperative AF. For AF patients on anti-platelet treatment, GDF-15 plays a critical role in predicting major bleeding, cardiovascular death and overall death, and improves the current predicting model.
Conclusions: Circulating GDF-15 greatly associates with AF and AF-related complications. It should be applied clinically.
Artes performativas como presença compartilhada: a potência de afeto na imprevisibilidade do encontro entre corpos
Authors: Lopes Duenha Milene
Published: July 2020

Este artigo aborda a presença do artista como relação, problematizando a ideia de previsibilidade da recepção na experiência artística presencial. Pesquisas sobre o corpo e seus modos de percepção se apoiam na noção de embodiment (mente incorporada), e de corpo poroso, diante de estudos advindos da arte, da filosofia e das neurociências que permitem um percurso cartográfico acerca do tema. Noções de partilha e afeto são apresentadas com referência em escritos de Jacques Rancière e Benedictus de Spinoza respectivamente. O relato de uma das experiências do coletivo brasileiro ‘Mapas e Hipertextos’ exemplifica, na prática, via metodologia hipotético-dedutiva, a ideia de imprevisibilidade dos efeitos no encontro entre os corpos, e a possibilidade de uma produção artística cuja potência de afeto emerge entre os corpos presentes que compõem no ambiente.
Impacto del léxico mental en la comprensión lectora en niños de nivel socioeconómico bajo
Authors: Ferroni Marina
Published: July 2020

Objetivo. Analizar el impacto que las representaciones léxicas de niños hispanohablantes, que crecen en contextos de pobreza, tiene sobre la comprensión lectora. Método. Se evaluó a 61 niños en una prueba de comprensión lectora y, a partir de los resultados, se dividió la muestra total en dos grupos: un grupo de alto nivel de comprensión y otro grupo de bajo nivel. Luego, se evaluaron ambos grupos en pruebas de vocabulario (representaciones semánticas del léxico mental) y el nivel lector (representaciones ortográficas del léxico mental). Asimismo, se exploró el nivel de memoria operativa de los niños, la realización de inferencias y el procesamiento morfosintáctico de lenguaje oral. Resultados. Se obtienen resultados que otorgan evidencia sobre la incidencia del léxico mental en la comprensión de textos escritos.
La producción de Odiseo.com, una teleperformance sudamericana
Authors: Paoletta Anabel
Published: July 2020

El presente trabajo estudia el modelo de creación empleado en la teleperformance Odiseo.com entendida desde la perspectiva de la teatralidad. La misma se sustenta en el abordaje de los conceptos convivio, poiesis corporal y expectación; en relación con la noción de teatro posdramático, tecnovivio, cibercepción, cíborg y avatar. Además, en este caso particular se analiza la adaptación de la obra La Odisea de Homero y la refuncionalización de su canto V.
Pornografía y pospornografía: análisis estético-político sobre la representación del cuerpo en la contemporaneidad
Authors: Brenes Vargas Alonso
Published: July 2020

El presente ensayo ejercita un análisis alrededor de las dimensiones estético-políticas de la pornografía y la pospornografía como fenómenos centrales de producción y representación de la sexualidad contemporánea. En adscripción a la filosofía queer, que plantea la necesidad de una deconstrucción radical de los estatutos identitarios desplegados en la maquinaria del capitalismo avanzado, se parte de la hipótesis de que el cuerpo, en su condición performativa, se configura como una producción viva de subjetividad política. Dentro de esta perspectiva, aparece una urgencia por el análisis crítico y el agenciamiento de la pornografía como técnica de subjetivación; y es sobre estos terrenos en los que discurrirá el siguiente estudio.