bluuebunny/crossref_metadata_2025 huggingface dataset:
Le paysage intellectuel du développement durable en Amérique latine. Une analyse de réseau à partir des citations d’auteurs latino-américains
Authors: Vanhulst Julien , Zaccai Edwin
Published: December 2019

Les discours scientifiques sont influencés par des visions du monde et des valeurs partagées par des communautés scientifiques. En matière de développement durable, comme pour d’autres sujets, la production, diffusion et réception de savoirs structurent l’univers discursif d’espaces académiques. Cet article propose une cartographie du champ des interactions académiques d’un échantillon de 93 intellectuels influents en matière de développement durable en Amérique latine à partir d’un examen de plus de dix mille citations sur une période de quarante ans (1972-2012). Cette analyse quantitative est complétée par une analyse qualitative portant sur le contenu de la pensée des auteurs les plus importants. Il en ressort une structuration progressive du champ discursif sur le sous-continent. Sur le fond, nous observons que beaucoup de discours académiques, construits en synergie avec certains mouvements sociaux qui luttent pour la justice et la soutenabilité socioenvironnementale, s’avèrent critiques.
Die Zentralsehne
Authors: Corts Magga
Published: December 2019

Das Denkmodell der Zentralsehne beschreibt eine Muskel-Faszien-Kette im Körper, die sich in der Region der Medianlinie befindet. Die Strukturen reichen von innerhalb des Schädels bis zur unteren Extremität. Durch dieses Modell kann man den myofaszialen Einfluss auf die Posturologie darstellen.
4 Fachleute – 4 Strategien: Inkontinenz beim Hund
Authors: Gräff Christiane , Börner Doris , Süße Stefanie , Zohmann Andreas
Published: December 2019

Der Fall: 4-jährige Hündin, mit 2 Jahren kastriert, 4 Monate später begann die Inkontinenz, seitdem mittelgutes Ansprechen auf Ephedrin. Geht es vielleicht auch ohne Medikamente? Wie gehen Sie vor?
Evidenz-basierte Prophylaxe, Diagnostik und Therapie der Osteoporose im Jahre 2019
Authors: Buschhorn-Milberger Verena , Erkenberg Judith , Guminski Barbara , Thomasius Friederike , Braun Jürgen , Bühring Björn
Published: December 2019

Osteoporose ist eine Volkskrankheit, die sich durch niedrigtraumatische Frakturen manifestiert. Sie ist durch eine niedrige Knochendichte und verschlechterte ossäre Mikroarchitektur charakterisiert. Osteoporotische Frakturen führen zu Mobilitätsverlusten, Schmerzen und erhöhter Morbidität und Mortalität. Trotz ihrer Häufigkeit und schlimmen Konsequenzen bleibt die Osteoporose untertherapiert. Der Dachverband Osteologie (DVO) hat 2017 seine Leitlinie „Prophylaxe, Diagnostik und Therapie der Osteoporose bei postmenopausalen Frauen und bei Männern“ aktualisiert. Diese Übersichtsarbeit fasst die wichtigsten Empfehlungen und Neuerungen zusammen und gibt einen Ausblick auf Entwicklungen in den nächsten Jahren
„Zur Freiheit des Einzelnen gehört das Recht auf Selbstbestimmung über den eigenen Körper“
Authors: Strasser Benjamin
Published: December 2019

„DHZ-Herausgeber Siegfried Kämper im Gespräch mit FDP-Politiker Benjamin Strasser über die Gegenwart und Zukunft des Heilpraktikerberufs.“
Herzinsuffizienz und Arrhythmien
Authors: Stellbrink Christoph
Published: December 2019

Die häufigsten und prognostisch bedeutsamsten Arrhythmien bei der Herzinsuffizienz sind Vorhofflimmern und ventrikuläre Arrhythmien. Pathophysiologisch liegen beiden Arrhythmien eine Aktivierung des neurohumoralen Systems im Rahmen des Remodelings, myokardiale Hypertrophie bzw. Fibrose sowie Änderungen der kardialen Erregungsleitung und der Repolarisation zugrunde. Vorhofflimmern führt zu einer Beeinträchtigung der kardialen Hämodynamik, erhöht die Mortalität und das Risiko für thromboembolische Komplikationen. Die Therapie fokussiert daher auf die Antikoagulation, den Erhalt des Sinusrhythmus bzw. eine Frequenzkontrolle, wenn ein Sinusrhythmus nicht mehr dauerhaft erhalten werden kann. Da die antiarrhythmische Therapie praktisch auf Amiodaron beschränkt ist, spielt die Katheterablation eine zunehmende Rolle, wenn ein Erhalt des Sinusrhythmus das therapeutische Ziel ist. Allerdings ist der Eingriff bei herzinsuffizienten Patienten komplex und sollte in erfahrenen Zentren durchgeführt werden. Auch für ventrikuläre Arrhythmien sind die Möglichkeiten der medikamentösen Therapie beschränkt, daher ist bei Patienten mit ausgeprägter systolischer Herzinsuffizienz oft ein implantierbarer Kardioverter-Defibrillator (ICD) indiziert. Allerdings ist die Datenlage für Patienten mit nicht ischämischer Kardiomyopathie etwas schlechter als für Patienten mit linksventrikulärer Dysfunktion nach Infarkt. Auch bei ventrikulären Tachykardien spielt die Katheterablation bei Herzinsuffizienz eine zunehmende Rolle, besonders bei ischämischen Patienten. Sie kann die Häufigkeit von ventrikulären Tachykardien und ICD-Schocks reduzieren, ein Nutzen hinsichtlich Mortalität ist allerdings nicht nachgewiesen.
Medikamenten-assoziierte Kiefernekrosen – Relevanz aus rheumatologischer Sicht?
Authors: Hoefert Sebastian
Published: December 2019

Die Medikamenten-assoziierte Kiefernekrose (MRONJ) ist eine schwere Nebenwirkung einer Antiresorptivatherapie mit Bisphosphonaten und Denosumab sowie von antiangiogenetischen Medikamenten. 16 Jahre nach der Erstbeschreibung der Medikamenten-assoziierten Kiefernekrose konnten noch nicht alle Ursachen geklärt und das Risiko für das Auftreten einer Nekrose minimiert werden. Neue Substanzen und Targeted Therapies können ebenfalls für Nekrosen des Kiefers mit ursächlich sein. Patienten mit rheumatischen Erkrankungen, die mit Biologika und DMARDs behandelt werden, stellen dabei eine besondere Risikogruppe dar und werden nach der neuen S3-Leitlinie „Antiresorptiva-assoziierte Kiefernekrosen (AR-ONJ)“ in ein „mittleres Risikoprofil“ eingeordnet. Aus diesem Grunde ergibt sich eine Relevanz dieses Krankheitsbildes für den rheumatologisch tätigen Mediziner. Dieses soll Anlass sein, über dieses Krankheitsbild zu berichten und für diese Problematik zu sensibilisieren.
Das Kagami-Ogata-Syndrom: Eine Rippenanomalie als pathognomonisches
Korrelat für die klinische Diagnose eines (epi)genetischen
Syndroms
Authors: Westeppe Sarah , Dionysopoulou Anna , Kidszun Andre , Schmeh Isabella , Bartsch Oliver , Mildenberger Eva , Winter Julia
Published: December 2019

Innerhalb von 4 Jahren (2014–2017) haben wir 2 Neugeborene mit der
genetisch gesicherten Diagnose eines Kagami-Ogata-Syndroms (OMIM #608149)
betreut. Pränatal fielen bei beiden Föten ein Polyhydramnion und
in einem Fall eine Hepatomegalie auf. Beide Patienten litten postnatal unter
einer respiratorischen Insuffizienz und wiesen mit einer Muskelhypotonie, einem
vorspringenden Philtrum, vollen Wangen sowie einer breiten Nasenwurzel die
typischen phänotypischen Merkmale dieses Imprinting-Defekts auf.
Wegweisend für die Diagnosestellung waren die
kleiderbügelförmigen Rippen („coat-hanger ribs“)
und der glockenförmige Thorax (bell-shaped thorax) im
Röntgenbild. Das Kagami-Ogata-Syndrom ist auf eine Veränderung
der Genexpression auf dem Chromosom 14 zurückzuführen und wurde
erstmals im Jahr 1991 beschrieben. Als Ursachen werden eine paternale
uniparentale Disomie des Chromosoms 14 von Epimutationen sowie Mikrodeletionen
unterschieden. Bisher sind in der Literatur rund 70 Fälle beschrieben
worden. 34 Betroffene zählen zu der Kohorte der namensgebenden Forscher
M. Kagami und T. Ogata. Die Inzidenz der Erkrankung ist bis heute unbekannt. Die
Patienten zeigen oft eine verzögerte Entwicklung mit einer mentalen
Retardierung, wobei mittlerweile in der Literatur auch Kasuistiken mit milderen
Verläufen zu finden sind. 3 Kinder der Kohorte entwickelten im Verlauf
ein Hepatoblastom, sodass Schnittstellen zu anderen Imprintingdefekten wie dem
Beckwith-Wiedemann-Syndrom nach dem heutigen Stand der Wissenschaft nicht
ausgeschlossen und bei den Nachuntersuchungen berücksichtigt werden
müssen.
Fortbildungscurriculum: Spezialisierte Herzinsuffizienz-Assistenz
Authors: Störk Stefan , Kindermann Ingrid , Jacobs Michael , Perings Stefan , Raake Philip , Rosenkranz Stephan , Schwinger Robert H.G. , von Scheidt Wolfgang , Wachter Rolf , Pauschinger Matthias
Published: December 2019

Um der wachsenden Anzahl von Herzinsuffizienz-Patienten besser gerecht zu werden, empfehlen die Europäischen Behandlungsleitlinien für das Syndrom Herzinsuffizienz strukturierte Nachsorgeprogramme. In diesen Programmen können wesentliche Aufgaben (wie Beratung, Monitoring, Kommunikation, Organisation, Dokumentation) an nichtärztliches Fachpersonal delegiert werden. Das hier beschriebene, durch die Deutsche Gesellschaft für Kardiologie konsentierte Fortbildungscurriculum „Spezialisierte Herzinsuffizienz-Assistenz“ will zur Verbesserung der Versorgung von Herzinsuffizienz-Patienten beitragen.
Perinatal Outcomes of Fetuses with Early Growth Restriction, Late Growth Restriction, Small for Gestational Age, and Adequate for Gestational Age
Authors: Inácio Quênya Antunes Silveira , Araujo Júnior Edward , Nardozza Luciano Marcondes Machado , Petrini Caetano Galvão , Campos Victor Paranaíba , Peixoto Alberto Borges
Published: December 2019

Objective To evaluate the association between early-onset fetal growth restriction (FGR), late-onset FGR, small for gestational age (SGA) and adequate for gestational age (AGA) fetuses and adverse perinatal outcomes.

Methods This was a retrospective longitudinal study in which 4 groups were evaluated: 1 — early-onset FGR (before 32 weeks) (n = 20), 2 — late-onset FGR (at or after 32 weeks) (n = 113), 3 — SGA (n = 59), 4 — AGA (n = 476). The Kaplan-Meier curve was used to compare the time from the diagnosis of FGR to birth. Logistic regression was used to determine the best predictors of adverse perinatal outcomes in fetuses with FGR and SGA.

Results A longer time between the diagnosis and birth was observed for AGA than for late FGR fetuses (p < 0.001). The model including the type of FGR and the gestational age at birth was significant in predicting the risk of hospitalization in the neonatal intensive care unit (ICU) (p < 0.001). The model including only the type of FGR predicted the risk of needing neonatal resuscitation (p < 0.001), of respiratory distress (p < 0.001), and of birth at < 32, 34, and 37 weeks of gestation, respectively (p < 0.001).

Conclusion Fetal growth restriction and SGA were associated with adverse perinatal outcomes. The type of FGR at the moment of diagnosis was an independent variable to predict respiratory distress and the need for neonatal resuscitation. The model including both the type of FGR and the gestational age at birth predicted the risk of needing neonatal ICU hospitalization.
Factors Associated with the Need for Insulin as a Complementary Treatment to Metformin in Gestational Diabetes Mellitus
Authors: Souza Matheus Leite Ramos de , Silva Rodrigo Ribeiro e , Silva Thiago Ribeiro e , Oliveira Larissa Cano de , Dienstmann Guilherme , Nascimento Iramar Baptistella do , Silva Jean Carl
Published: December 2019

Objective To evaluate the factors associated with the need for insulin as a complementary treatment to metformin in pregnant women with gestational diabetes mellitus (GDM).

Methods A case-control study was performed from April 2011 to February 2016 with pregnant women with GDM who needed complementary treatments besides diet and physical exercise. Those treated with metformin were compared with those who, in addition to metformin, also needed the combination with insulin. Maternal characteristics and glycemic control were evaluated. Multinomial logistic regression models were developed to evaluate the influence of different therapies on neonatal outcomes.

Results A total of 475 pregnant women who needed pharmacological therapy were evaluated. Of these, 366 (77.05%) were submitted to single therapy with metformin, and 109 (22.94%) needed insulin as a complementary treatment. In the analysis of the odds ratio (OR), fasting glucose (FG) < 90 mg/dL reduced the odds of needing the combination (OR: 0.438 [0.235–0.815]; p = 0.009], as well as primiparity (OR: 0.280 [0.111–0.704]; p = 0.007]. In obese pregnant women, an increased chance of needing the combination was observed (OR: 2,072 [1,063–4,039]; p = 0,032).

Conclusion Obesity resulted in an increased chance of the mother needing insulin as a complementary treatment to metformin, while FG < 90 mg/dL and primiparity were protective factors.
Association of Menopausal Status, Expression of Progesterone Receptor and Ki67 to the Clinical Response to Neoadjuvant Chemotherapy in Luminal Breast Cancer
Authors: Silva Leonardo Roberto da , Vargas Renato Flora , Shinzato Júlia Yoriko , Derchain Sophie Françoise Mauricette , Ramalho Susana , Zeferino Luiz Carlos
Published: December 2019

Objective To identify the biomarkers of response to neoadjuvant chemotherapy in early luminal breast cancer.

Methods A cross-sectional study that included all patients with early or locally-advanced luminal breast cancer submitted to neoadjuvant chemotherapy between 2013 and 2014. Demographic, clinic and pathologic data were retrieved from patient records. The expressions of the estrogen receptor (ER), the progesterone receptor (PR), and Ki67 were analyzed by immunohistochemistry (IHC). The status of the human epidermal growth factor receptor 2 (HER2) was evaluated by IHC and fluorescent in situ hybridization (FISH). Independent predictors of clinic and pathologic response were evaluated by stepwise logistic regression models and receiver operating characteristic (ROC) curve analysis.

Results Out of 298 patients identified, 115 were included in the analysis. Clinical complete response (cCR) was observed in 43.4% of the patients (49/113), and pathologic complete response (pCR) was observed in 7.1% (8/115) of the patients. The independent predictors of cCR were premenopausal status (p < 0.001), low PR expression (≤ 50% versus > 50%; p = 0.048), and Ki67 expression ≥ 14% (versus < 14%; p = 0.01). Patients with cCR were more commonly submitted to breast conserving surgery (34.7% versus 7.8%; p < 0.001). Increasing cut-off points for Ki67 expression were associated with an increase in specificity and a decrease in sensitivity to identify patients with cCR.

Conclusion Premenopausal status, lower PR expression and higher Ki67 expression were associated with a higher rate of cCR to neoadjuvant chemotherapy in luminal breast cancer.
Regularizing the fast multipole method for use in molecular simulation
Authors: Shamshirgar D. S. , Yokota R. , Tornberg A.-K. , Hess B.
Published: December 2019

The parallel scaling of classical molecular dynamics simulations is limited by the communication of the 3D fast Fourier transform of the particle-mesh electrostatics methods, which are used by most molecular simulation packages. The Fast Multipole Method (FMM) has much lower communication requirements and would, therefore, be a promising alternative to mesh based approaches. However, the abrupt switch from direct particle-particle interactions to approximate multipole interactions causes a violation of energy conservation, which is required in molecular dynamics. To counteract this effect, higher accuracy must be requested from the FMM, leading to a substantially increased computational cost. Here, we present a regularization of the FMM that provides analytical energy conservation. This allows the use of a precision comparable to that used with particle-mesh methods, which significantly increases the efficiency. With an application to a 2D system of dipolar molecules representative of water, we show that the regularization not only provides energy conservation but also significantly improves the accuracy. The latter is possible due to the local charge neutrality in molecular systems. Additionally, we show that the regularization reduces the multipole coefficients for a 3D water model even more than in our 2D example.
Scaling relationships between acoustic and electromagnetic scattering by an infinite cylinder
Authors: Lin Hai , Ge Junxiang , Wang Jie
Published: December 2019

The conversion relationships, including the scaling of frequencies and sizes, between the scattering of a uniform plane electromagnetic wave by a dielectric cylinder and the scattering of a uniform plane acoustic wave by a non-shear-stress cylinder are studied. Owing to the dependence of electromagnetic scattering on polarization, especially for dielectric materials, a simulation method using two acoustic materials is proposed for cases with complex polarization, such as circular polarization. The scaling relationships are verified by simulation. This approach proves to be an effective supplement to the indirect method of measuring electromagnetic scattering by acoustic scattering. A preliminary study of scattering by three-dimensional objects is also performed for the simplest case of spheres. Although the results are not as good as those for two-dimensional objects, the errors after processing are sufficiently small for these results to be accepted as estimates.
Self-excited chaotic shedding of acoustically levitated drops through multi-mode spatiotemporal synchronization
Authors: Lin Po-Cheng , I Lin
Published: December 2019

We experimentally study the spatiotemporal dynamics of self-excited shedding of millimeter-sized water drops acoustically levitated in a single-node standing wave cavity. By decreasing the sound intensity below the threshold, the interplay of drop motion and its perturbed acoustic wave field lead to the transition from stable self-excited drop oscillation to chaotic drop oscillation with growing fluctuations and intermittent droplet shedding. Using azimuthal Fourier transform, the top-view drop shape can be decomposed into zonal and sectoral modes with varying amplitudes. The shedding is led by the increasing amplitudes of the low order sectoral modes (azimuthal mode number m = 2 and 3), which cause the strongest amplitude in the zonal mode (m = 0) in the re-expansion stage after the shrinking of the side lobes in the low order modes. It in turn causes synchronized excitations of high order sectoral modes with m > 3. Their constructive superposition at certain points along the flattened thin edge of the re-expanding drop leads to sharp protrusions, where the surface tension cannot hold the thin rapid expanding jets, and shedding occurs.
A novel rapid-combustion process for the preparation of magnetic α-Fe2O3 nanoparticles
Authors: Liu Min , Huang Wei , Wang Zhou , Wu Shengwei , Liu Ruijiang
Published: December 2019

A novel rapid-combustion process for the preparation of magnetic α-Fe2O3 nanoparticles was introduced. The as-prepared α-Fe2O3 nanoparticles were characterized by scanning electron microscopy, the transmission electron microscope, X-ray diffraction, energy dispersive spectroscopy, the vibrating sample magnetometer, the thermogravimetric analysis, and differential scanning calorimetry. The experimental results revealed that α-Fe2O3 nanoparticles could form even at 400 °C, and the volume of absolute alcohol and the calcination temperature were two key parameters for the preparation of α-Fe2O3 nanoparticles. With the calcination temperature increasing from 400 °C to 800 °C, the average crystallite size of α-Fe2O3 nanoparticles with 10 ml of absolute alcohol increased from 26 nm to 45 nm and the degree of crystal defects was enlarged. When dosage of absolute alcohol increased from 5 ml to 25 ml, the average crystallite size of α-Fe2O3 nanoparticles calcined at 400 °C for 2 h ranged from 23 nm to 27 nm and their specific saturation magnetizations increased from 0.4 emu/g to 36.9 emu/g.
Optical anisotropy in electroactively elongated single-walled carbon nanotubes agglomerates
Authors: Liu Yang , Zhao Yuanyuan , Sang Jingxin , Xu Haiqin , Shang Jianhua , Liu Hao , Sun Jiatong , Zhao Shuguang , Tie Weiwei , Lim Young Jin , Lee Seung Hee
Published: December 2019

A thin layer of single-walled carbon nanotubes (SWCNTs) exhibiting optical anisotropy is prepared by electroactively elongating SWCNT agglomerates. SWCNTs are doped into a reactive mesogen (RM) solution, and the composite solution is spin-coated on an interdigitated-electrode substrate. The spherical shaped SWCNT agglomerates observed in the solution of thin layers are electroactively elongated and aligned along the direction of the external electric field. After elongating the SWCNT agglomerates, the transparency of RM-SWCNT thin composite layers increases by about 14%. In addition, the elongated SWCNT agglomerates present significant optical anisotropy such that an incident light with a polarization direction parallel and perpendicular to the elongated direction of SWCNTs is absorbed and transmitted, respectively. The electroactively elongating strategy adopted to realize the optical anisotropy of SWCNT agglomerates suggests a new way to fabricate an optically anisotropic SWCNT thin layer.
Effect of metal ion solubility on the oxidative assembly of metal sulfide quantum dots
Authors: Silva Karunamuni L. , Silmi Leenah , Brock Stephanie L.
Published: December 2019

The versatility of the oxidative assembly method for the creation of 2D and 3D quantum dot (QD) architectures represents both an opportunity and a challenge as a method enabling controlled placement of chemically distinct QDs in multicomponent systems. The opportunity lies in the ability to independently tune the kinetics of the different components so that they are similar (leading to well-mixed systems) or different (enabling gradient or phase-segregated composites) using a wide range of variables; the challenge lies in understanding those variables and how their interplay affects the overall kinetics. Here, we show that the identity of the cation in the sulfide matrix (M = Cd2+ vs Zn2+) plays a large role in the kinetics of assembly of mass spectrometry QDs, attributed to differences in solubility. Time resolved dynamic light scattering is used to monitor the hydrodynamic radius, R¯h. ZnS shows an exponential growth associated with reaction-limited cluster aggregation (RLCA), whereas CdS demonstrates a significant induction period (10–75 min) followed by a growth step that cannot be distinguished between RLCA and diffusion limited cluster aggregation. These data correlate with relative solubilities of the nanoparticles, as probed by free-cation concentration. Data also confirm prior studies showing that cubic-closest-packed (ccp) lattices are kinetically slow relative to hexagonally closest-packed (hcp); using the slope of the ln R¯h vs time plot for the rate constant, the values of 0.510 s−1 and 3.92 s−1 are obtained for ccp ZnS and hcp ZnS, respectively. Thus, both the structure and the solubility are effective levers for adjusting the relative reactivity of QDs toward oxidative assembly.
Low compressible β-BP3N6
Authors: Manyali George S. , Sifuna James
Published: December 2019

Using first principles calculation, the structural and mechanical properties of β-BP3N6, which adopts an orthorhombic structure with space group Pna21 (no. 33), were determined at three different pressure values (0, 20, and 42.4 GPa). The nine independent elastic constants meet all necessary and sufficient conditions for mechanical stability criteria for an orthorhombic crystal. β-BP3N6 shows strong resistance to volume change and hence a potential low compressible material. The Vickers hardness of β-BP3N6 was found to range between 49 and 51 GPa for different external pressures imposed on the crystal. These high values of Vickers hardness imply that β-BP3N6 is a potential superhard material.
(Pr, Ho)-Fe-B magnets for low-temperature applications
Authors: Kolchugina Nataliya B. , Skotnicova Katerina , Lukin Aleksander A. , Burkhanov Gennadii S. , Zivotsky Ondrej , Kursa Miroslav , Dormidontov Nikolay A. , Prokofev Pavel A. , Koshkiďko Yuri S. , Cegan Tomas , Kaminskaya Tatiana P. , Ginzburg Boris A.
Published: December 2019

We have investigated the effect of HoH2 hydride addition on the hysteresis loop parameters of sintered Pr-Fe-Ti-Al-Cu-B magnets. The magnets were prepared by traditional powder metallurgy technology, and 3 wt.% HoH2 was added to the powder at the fine-milling stage. The magnets exhibited a monotonic increase in all hysteretic parameters with decreasing temperature down to 4.2 K. The coercive force and maximum energy product at 295 K (4.2 K) were 1344 (5402) kA/m and 221 (336) kJ/m3, respectively. The structure of the magnets was studied in detail by scanning electron microscopy and energy dispersive X-ray spectroscopy, which demonstrated the formation of the so-called “core-shell” structure, which is assumed to favor the marked improvement in the hysteretic properties of the samples analyzed. The surface domain structure was measured in the directions perpendicular and parallel to the magnet texture using magnetic force microscopy. The data obtained indicated fine labyrinth-like and strip domain patterns in the directions perpendicular and parallel to the magnet texture, with an average domain width of 1.2–1.8 µm.
Probing fluid torque with a hydrodynamical trap: Rotation of chiral particles levitating in a turbulent jet
Authors: Barois Thomas , Huck Peter D. , Paleo Charles , Bourgoin Mickaël , Volk Romain
Published: December 2019

A vertical turbulent jet is used to trap chiral particles. The particles are maintained in levitation and a stationary rotation regime is observed. The model particles used are composed of a sphere and a helical tail. The rotating performance of the particles is investigated as a function of the length and the twisting of their tails. In addition, the flow field around a spherical particle trapped in the jet is characterized by a 3D-particle tracking velocimetry technique. This flow characterization is used to compute the near-field velocity around a captured particle and to predict the rotation reported for the different geometries tested.
Synthesis, Structure, and Biological Assays of Novel Trifluoromethyldiazepine–Metal Complexes
Authors: Rocha Mariana , Echeverría Gustavo A. , Piro Oscar E. , Jios Jorge J. , Molina Rocío D. I. , Arena Mario E. , Ulic Sonia E. , Gil Diego M.
Published: December 2019

A new series of CuII, NiII, CoII, and MnIII complexes have been synthesised from the (6Z)-6-(7-trifluoromethyl-1,2,3,4-tetrahydro-5H-1,4-diazepin-5-ylidene)cyclohexa-2,4-dien-1-one (HDZP) ligand. These complexes were characterised by elemental, spectroscopic (IR and UV-vis), and thermal analysis. The crystal structure of Cu-DZP was solved by X-ray diffraction methods. The complex crystallises in the monoclinic P21/c space group, with two molecules per unit cell. The crystal lattice is stabilised by different intra and intermolecular interactions. Hirshfeld surface analysis was employed to obtain additional information about interactions that are responsible for the crystal packing. Quantitative examination of the fingerprint plots indicated the dominant contribution of H⋯H and H⋯X (X=O, F) interactions in the crystal packing. In addition, C–H⋯chelate ring (CR) and C–H⋯π interactions are described in detail and evaluated using DFT calculations. The antibacterial properties and the mechanism of inhibition of the main bacterial resistant mechanism, the biofilm, of the metal complexes and free ligand were investigated. [Mn(DZP)3]·2H2O was the most active complex against the Pseudomonas aeruginosa biofilm formation with an inhibition of 40%. However, none of the complexes inhibit more than 25% of the Gram negative bacteria microbial development. The most meaningful result was the bactericidal effect of [Co(DZP)2(H2O)2]·2H2O against the Gram positive bacteria, Staphylococcus aureus, which inhibits the bacterial development and significantly reduces the biofilm formation at low concentration.
The maize heterotrimeric G protein β subunit controls shoot meristem development and immune responses
Authors: Wu Qingyu , Xu Fang , Liu Lei , Char Si Nian , Ding Yezhang , Je Byoung Il , Schmelz Eric , Yang Bing , Jackson David
Published: December 2019

Significance

Cereal crops, such as maize, provide our major sources of food and feed. Crop productivity has been significantly improved by the selection of favorable architecture and development alleles; however, crops are constantly under attack from pathogens, which severely limits yield due to a defense–growth trade-off. Therefore, identifying key signaling regulators that control both developmental and immune signaling is critical to provide basic knowledge to maximize productivity. This work shows that the maize G protein β subunit regulates both meristem development and immune signaling and suggests that manipulation of this gene has the potential to optimize the trade-off between yield and disease resistance to improve crop yields.
Mandarin Chinesebuguo(‘but’) as a metacoherence marker in TV/radio interview talks
Authors: Wang Yufang , Shyu Shu-ing , Schams Wayne , Chen Hsun-Chen
Published: December 2019

This study examines the uses of Mandarin Chinesebuguo‘but’ as a contrastive discourse marker (CM) in spoken discourse. The data were taken from casual conversations, TV/radio single-interviewee interviews and TV panel news interviews. We found that two main types of the CMbuguowere used to mark contrast: restrictivebuguoand cancellativebuguo. Restrictivebuguois similar to theadvbuguoin usage in that it modifies the validity of the preceding proposition to signal implicit contrast. Cancellativebuguois used to cancel the validity of a previous proposition to indicate explicit contrast. As such, restrictivebuguocan serve as a topic-shift marker and to convey implicit disagreement; cancellativebuguooften acts as a topic-change marker used to introduce explicit disagreement. In particular, both restrictivebuguoand cancellativebuguocan serve as metacoherence markers, which are often employed by interview hosts/hostesses to make the discourse optimally coherent.
Care policies in practice: how discourse matters for policy implementation
Authors: Ciccia Rossella , Lombardo Emanuela
Published: December 2019

This article puts public policy research in dialogue with gender and politics studies to enhance our understanding of the implementation of care policies. Care policies present interesting problems of implementation because of the multiplicity of aims, values, inequalities, actors and levels of governance involved. Nonetheless, previous research shows two important gaps: 1) the neglect of discursive factors in studies of implementation; and 2) the lack of attention to implementation processes in the analysis of care policies. This article suggests a general framework to address these issues which considers discourse as a transversal factor connecting actors and institutions engaged in policy implementation. The articles in this special issue demonstrate that including discourses in the analysis of care policy implementation makes visible the influence of gender+ norms and the dynamic and contentious processes surrounding them in a variety of institutional arenas, levels, and national contexts.
The effects of annealing temperature and angular velocity variation on microstructure and optical properties of barium titanate (BaTiO3) using chemical solution deposition method
Authors: Rini R. P. , Nurosyid F. , Iriani Y.
Published: December 2019

This study is aimed to find out the energy gap value of BaTiO3 thin film since this study has a purpose to reduce the energy gap so that it can be used for photovoltaic applications. The making of Barium Titanate (BaTiO3) thin film was carried out on the quartz substrate using the Chemical Solution Deposition (CSD) method with the technique of depositing spin coating. The making of BaTiO3 thin film was carried out using variation of angular velocity at 4000 rpm and 5000 rpm and variation of annealing temperature at 750°C, 800°C, 850°C. The samples in this study were annealed at 750°C, 800°C, 850°C with a holding time of 1 hour and an increase in temperature of 3°C/minute. The microstructure characterization of the samples was carried out using X-Ray Diffraction (XRD) equipment, and the thickness of the thin film characterization and grain size of samples using Scanning Electron Microscopy (SEM) equipment. The annealing temperature increase, the intensity becomes higher. As the annealing temperature increase, then the crystallinity, crystallite size and grain size of BaTiO3 thin film will get bigger. The annealing temperature increase is resulted the thickness and energy gap are smaller. The intensity value of the XRD remains decrease along with the angular velocity increase. The higher angular velocity causes the crystallinity and crystallite size of BaTiO3 thin film becomes higher. However, the angular velocity increase then the grain size will become smaller. The angular velocity higher, then the BaTiO3 thin film gets thinner. The angular velocity gets higher, then the smaller energy gap produced. The energy gap value was produced between 3.00 – 3.50 eV.
Effect of pre-annealing and annealing temperature on microstructural and optical properties of multiferroic BiFeO3 thin films prepared by chemical solution deposition (CSD)
Authors: Agustina E B , Iriani Y , Suryana R
Published: December 2019

BiFeO3 thin films has been successfully grown on a quartz substrate using the chemical solution deposition (CSD) method. X-ray diffraction (XRD) used to determine the microstructure of BFO. The morphology and transmittance of BFO thin film were studied using SEM and UV-VIS. Deposition of the BiFeO3 thin film with pre-annealing in air and variation of annealing temperature showed that the increase in annealing temperature caused crystallinity to be higher and crystallite size to increase. High annealing temperature results in a larger grain size and lower thickness. Deposition of the BiFeO3 thin film with pre-annealing variation showed that BiFeO3 with pre-annealing in air had a higher crystallinity compared with in O2. The crystallite size of BiFeO3 with pre-annealing in O2 is greater than pre-annealing in air. BiFeO3 with pre-annealing in air has a smaller grain size and greater thickness compared to preannealing in O2. BiFeO3 band gap with pre-annealing in air and variation of annealing temperature were obtained 1.4-3.5 eV. While the BiFeO3 band gap with pre-annealing variation was obtained from 2.3-2.7 eV.
The Effect of Indium Doped SnO2 Thin Films on Optical Properties Prepared by Sol-Gel Spin Coating Technique
Authors: Doyan A. , Susilawati  , Hakim S. , Muliyadi L. , Taufik M. , Nazarudin
Published: December 2019

This study aims to investigate the optical properties of SnO2 thin films doped with Indium synthesized using the sol-gel spin coating technique. The optical properties of thin films were measured using Thermo Scientific GENESYS UV-Vis Spectrophotometer. The results of characterization of optical properties showed that the thin films of Indium doped SnO2 experienced an increase in transmittance from 75 - 96.6% at wavelengths 300 - 350 nm and increased maximum absorbance at a wavelength of 300 nm from 3.19 - 4.32 with an increase in doping percentage. This shows that thin films absorbance the maximum wave at a wavelength of 300 nm. Increasing the percentage of doping causes the thin films of SnO2 to experience a decrease in energy gap both in the direct energy gap of 3.64 - 3.57 eV and indirect energy gap i.e from 3.92 - 3.87 eV. The optical activation energy of the SnO2 thin films decreased with increasing doping percentage from 2.91 - 2.35 eV. The results of this study indicate that SnO2: In thin films is high-quality because it has high transmittance and low energy gap.
Conceptual Framework of Reflective-Inquiry Learning Model to Promote Critical Thinking Ability of Preservice Physics Teachers
Authors: Verawati N N S P , Hikmawati  , Prayogi S
Published: December 2019

Critical thinking has been a crucial competence in 21st century learning and encouraging critical thinking ability at the university level is assumed as an important achievement at higher education. This study was aimed at developing Reflective-Inquiry Learning (RIL) model to promote critical thinking ability for preservice teachers in particular. This study was a pre-developmental stage in which the developed RIL model was constructed in line with the supporting theories and empirical findings. With the result that, it produced a hypothetical framework from RIL model itself. Then, the product of the RIL model was validated with involving 7 experts as validators through a focus group discussion (FGD) process. The assessed aspect of the product consisted of the content validity and construct validity. The results of the product validity were analyzed through a descriptive analysis viewed from the average score of the validity. The result of the validity showed the validity level (Va) of the RIL model was 4.28 and it was said very valid. The conceptual framework of the developed model and the validity result would be further elaborated in this article.
Correlation between increasing mastery concepts of wave and optics and habits of mind prospective physics teacher students
Authors: Susilowati E , Suyidno  , Mayasari T , Winarno N , Rusdiana D , Kaniawati I , Santoso P H
Published: December 2019

The purpose of this study was to determine the relationship between increasing mastery wave concepts and optics with habits of mind of physics prospective teacher students. This study involved 46 students who programed the Wave and Optics courses in one of the LPTK Physics Education Study Programs in Banjarmasin. The method used is mixed method with an embedded experimental model. Data analysis techniques used N Gain to determine the increase in mastery of concepts and habits of mind, then carried out normalization tests, and correlation tests to determine the relationship between the two. Analysis of the results of the study of increasing the mastery of wave concepts and optics with habits of mind of prospective physics teacher students showed a positive, strong, and very significant relationship with r (46) = 0.64; p = 0.01. This explains that the better the mastery of the concepts held by prospective teacher students, the better habits of mind of prospective teacher students, or vice versa.
Analysis of Physics Aspects of Local Wisdom: Long Bumbung (Bamboo Cannon) in Media Development for Android-Based Physics Comics in Sound Wave Chapter
Authors: Hudan Ramadhan Rahmad , Ratnaningtyas Latifah , Kuswanto Heru , Wardani Ratna
Published: December 2019

Local wisdom in Indonesia is a property that should be maintained. One way to instill local wisdom in students is to link physics learning. This study aims to develop a learning media for android physics comics based on local wisdom, android-assisted long bumbung. This article presents how researchers develop physics comics by exploring physical aspects that exist in local wisdom long bumbung. Android is used as a basis for using comics so that it can be used to learn physics whenever and wherever. This physics comic is also sought as enrichment material to strengthen the concepts and material students learn in class. The method in the development of physics comics is R & D (Educational Research and Development) with 4-D models. The process of developing comic physics media is through stages (1) Define consisting of Introduction, Analysis of students, Concept Analysis, and Analysis of learning objectives. (2) Design consists of Material Determination Study and Making Comic Media Component Specifications. Comic Media Physics in the form of electronic digital Book (EPUB) that can be read on the Android system with the help of Reader Reasily, Lithium, Himawari Reader, and others
Adsorption pattern on the optimization of interaction time for the reduction of phenol with charcoal activated ZnCl2
Authors: Kristianingrum S , Fillaeli A , Siswani ED , Sulistyani  , Parwanti
Published: December 2019

Interaction time significantly influenced the pattern of adsorption.This study aims to determine the characteristic of activated charcoal adsorbent, the decrease in phenol levels and its adsorption capacity, and test the adsorbent applicability to remove phenol from batik wastewater. The concentration of phenol was measured by UV-Vis spectrophotometer. The results showed that the characters of activated charcoal adsorbent in accordance with Indonesian National Standard (INS) 06-3730-1995. Its characters were water content, ash content and iodine adsorption power. Characterization using Surface Area Analyser (SAA) showed that the surface area of activated charcoal was 68.54 m2/g. The percentage decrease in phenol concentration will be greater along with the increase in concentration where 92.90%; 95.60%; and 97.15% of phenol decrease were influenced by the increasing level concentration of 0.6 mg/L; 0.8 mg/L; and 1.0 respectively with 24 hours optimal contact time. The adsorption capacity of activated charcoal was 0.048575 mg/g while the isotherm adsorption pattern of adsorbent fulfilled the pattern of Freundlich isotherm. Therefore, the availability of high surface area makes the activated charcoal of marine pandan leaves has significant impact to the adsorption of phenol where it was contacted optimum at 24 hours interaction with Freundlich adsorption pattern.
Brief review on materials used as carrier agents for larvicide formulations
Authors: Wong S T S , Kamari A , Yusoff S N M , Jumadi J , Abdulrasool M M , Kumaran S , Ishak S
Published: December 2019

Mosquito-borne diseases are great concerns of people in the worldwide, especially dengue. There are 390 million people infected with dengue in a year. According to Dengue Situation Update Report for Western Pacific Region, there is an increment in the number of the infected areas as compared to the same period of previous year. World of Health Organization (WHO) and Ministry of Health (MOH) from every country pay the highest attention towards this issue. Other than inventing new formulation of adulticides, application of larvicide is newly emerging as an effective method to control mosquitoes from spreading virus. In this brief review, several recent studies about ways of the virus transmitted through mosquito biting behaviour, larvicide formulation and types of carrier agents being used to carry larvicide will be discussed. In order to sustain the aquatic ecosystem, materials for carrier agents should be environmental-friendly. This review paper will give insight into the recent development in carrier system for mosquitoes larvicide formulations.
Removal of methylene blue and congo red by magnetic chitosan nanocomposite: Characterization and adsorption studies
Authors: Jumadi J , Kamari A , Rahim N A , Wong S T S , Yusoff S N M , Ishak S , Abdulrasool M M , Kumaran S
Published: December 2019

Dyes are stable organic pollutants that have been used in many industries and become one of the toxic contaminants for the environment. This research aimed at preparing a magnetic chitosan nanocomposite (MCN) as an effective adsorbent for cationic and anionic dye removal from aqueous solution. The MCN was synthesized using a coprecipitation method. The physical properties of MCN were characterized using elemental analysis (CHNO), vibrating sample magnetometry (VSM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and X-ray diffractometry (XRD). The results confirm that chitosan has been embedded on the surface of magnetic material and shows superparamagnetic properties behavior. A series of adsorption were conducted to investigate dosage of adsorbent, contact time and initial dye concentration to obtain the optimum condition of adsorption for both methylene blue (MB) and congo red (CR) dyes. The experimental equilibrium adsorption were then analyzed by the Langmuir and Freundlich isotherm models. Based on the correlation coefficient (R
2) values, the equilibrium adsorption data were fitted to the Langmuir isotherm model. The maximum adsorption capacity (q
m) obtained from the Langmuir isotherm model for MB and CR onto MCN was 0.1308 and 1.8257 mg/g, respectively. Results highlight the potential of MCN application as an adsorbent for water contaminated by dyes.
Self-Efficacy of Students Senior High School in Problem Based Learning Model of Chemical Equilibrium Topic
Authors: Handayani M , Louise ISY
Published: December 2019

The contextual learning model used in chemical equilibrium topic is problem based learning. Problem based learning facilitates students to analyze problem in daily life, using appropriate learning resources, and organize information into a conceptual framework. Self-efficacy is a feeling of confidence or student’s belief to carry out the task and achieved good result. This study aims to analyses students’ self-efficacy skills profile in chemical equilibrium topic using problem based learning model. This study used quasi experiment with post-test only design and used cluster random sampling. Self-efficacy of students was measured by 30 item statements questionnaire sheets. The result of this study indicated that student’s self-efficacy in problem based learning model achieved good category in some indicator. The higher score of students’ self-efficacy contained in indicator overcome the difficulties, complete the assignment, solve the problem, getting good result, apply efficacy in daily life, cooperate and communicate in team.
Development of Media Three-dimensional (3D) Visualization using Virtual Reality on Chemistry Education
Authors: Suleman M , Sugiyarto K H , Ikhsan J
Published: December 2019

This study aims to develop and test feasibility three-dimensional (3D) visualization of media using virtual reality in chemistry learning . The development model used in this study is Research and Development (R&D) model. This study implemented the stages of planning, preliminary development of the product, preliminary field testing, main product revision adapted from Borg and Gall. The development of the learning media in this study was validated by media expert, material expert, peer reviewers, and subject teachers, and was tested to 23 students. The results of this study revealed that three-dimensional (3D) media using virtual reality is feasible to use as learning media for high school students. The percentages of validation results are 74% by media and material experts, 76% by chemistry teachers, 84% by peer reviewers, and 77% by students. Overall, the average total percentage score of feasibility of the three-dimensional media is 78% categorized to ‘good’. In conclusion, the developed three-dimensional (3D) learning media using virtual reality is feasible to use in the chemistry learning process for the material of reaction rate.
Molecular Identification of Several Orchid Species Based on OPA10 and OPA18 RAPD Marker
Authors: Kurniawati Junita , Sugiyarto Lili , Yulianti Evy , Nurcahyo Heru , Mercuriani Ixora S.
Published: December 2019

The purpose of this study was to determine the genetic characteristics of nine orchids plants collected by Biology Gardens of Mathematics and Science Faculty of UNY based on OPA10 and OPA18 markers, to detect their genetic relationship, and determining the exact RAPD markers for identification of intraspecies and interspecies orchids. The analysis was carried out by isolating DNA from the leaves of 9 species of orchids (Rhynchostylis retusa, Vanda tricolor, Dendrobium aphyllum, Dendrobium fimbriatum, Dendrobium moschatum, Dendrobium crumenatum, Dendrobium antennatum, Dendrobium anosmumGigantea Alba andDendrobium anosmumGigantea) using TIANGEN DNA healing plant kit. Molecular identification was analysed based on the PCR-RAPD technique using OPA 10 and OPA18 primers. Electrophoregraph of PCR results are converted into binary data and analysed with NTSYSpc 2.02 software. The similarity index (kinship level) was analysed based on UPGMA dendrogram. The results of the analysis showed that there was genetic diversity in 9 orchid plants tested. Intra-species orchids show higher similarity than inter-species. Primer OPA 10, OPA18, and a combination of both shows polymorphism in intra-species orchids.