bluuebunny/crossref_metadata_2025 huggingface dataset:
SiC transmission-type polarization rotator using a large magneto-optical effect boosted and stabilized by dressed photons
Authors: Kadowaki Takuya , Kawazoe Tadashi , Ohtsu Motoichi
Published: July 2020

This paper reports the fabrication and operation of a transmission-type polarization rotator for visible light with a wavelength of 450 nm using indirect-transition-type semiconductor crystalline SiC in which Al atoms were implanted as a p-type dopant. A novel dressed-photon–phonon (DPP)-assisted annealing method was used for fabrication. The fabricated device exhibited a gigantic magneto-optical effect induced by interactions between photons, electrons, phonons, and magnetic fields in a nanometric space, mediated by dressed photons. The optical path length for polarization rotation was as short as the thickness of the p–n junction. It operated with a weak magnetic field on the order of mT, generated by injecting current to a ring-shaped electrode on the device surface. The Verdet constant was as large as 9.51 × 104 rad/T.m at a wavelength of 450 nm. SQUID measurements confirmed that the SiC crystal exhibited conspicuous ferromagnetic characteristics as a result of the DPP-assisted annealing. In this device, the dressed photons boosted the magnitude of the magneto-optical effect and stabilized the device operation of the polarization rotator.
A mixed culture of bacterial cells enables an economic DNA storage on a large scale
Authors: Hao Min , Qiao Hongyan , Gao Yanmin , Wang Zhaoguan , Qiao Xin , Chen Xin , Qi Hao
Published: July 2020

DNA emerged as a novel potential material for mass data storage, offering the possibility to cheaply solve a great data storage problem. Large oligonucleotide pools demonstrated high potential of large-scale data storage in test tube, meanwhile, living cell with high fidelity in information replication. Here we show a mixed culture of bacterial cells carrying a large oligo pool that was assembled in a high-copy-number plasmid was presented as a stable material for large-scale data storage. The underlying principle was explored by deep bioinformatic analysis. Although homology assembly showed sequence context dependent bias, the large oligonucleotide pools in the mixed culture were constant over multiple successive passages. Finally, over ten thousand distinct oligos encompassing 2304 Kbps encoding 445 KB digital data, were stored in cells, the largest storage in living cells reported so far and present a previously unreported approach for bridging the gap between in vitro and in vivo systems.
Genomic epidemiology of animal-derived tigecycline-resistant Escherichia coli across China reveals recent endemic plasmid-encoded tet(X4) gene
Authors: Sun Chengtao , Cui Mingquan , Zhang Shan , Liu Dejun , Fu Bo , Li Zekun , Bai Rina , Wang Yaxin , Wang Hejia , Song Li , Zhang Chunping , Zhao Qi , Shen Jianzhong , Xu Shixin , Wu Congming , Wang Yang
Published: July 2020

Public health interventions to control the recent emergence of plasmid-mediated tigecycline resistance genes rely on a comprehensive understanding of its epidemiology and distribution over a wide range of geographical scales. Here we analysed an Escherichia coli collection isolated from pigs and chickens in China in 2018, and ascertained that the tet(X4) gene was not present at high prevalence across China, but was highly endemic in northwestern China. Genomic analysis of tet(X4)-positive E. coli demonstrated a recent and regional dissemination of tet(X4) among various clonal backgrounds and plasmids in northwestern China, whereas a parallel epidemic coincided with the independent acquisition of tet(X4) in E. coli from the remaining provinces. The high genetic similarity of tet(X4)-positive E. coli and human commensal E. coli suggests the possibility of its spreading into humans. Our study provides a systematic analysis of the current epidemiology of tet(X4) and identifies priorities for optimising timely intervention strategies.
Visualizing drug binding interactions using microcrystal electron diffraction
Authors: Clabbers Max T. B. , Fisher S. Zoë , Coinçon Mathieu , Zou Xiaodong , Xu Hongyi
Published: July 2020

Visualizing ligand binding interactions is important for structure-based drug design and fragment-based screening methods. Rapid and uniform soaking with potentially reduced lattice defects make small macromolecular crystals attractive targets for studying drug binding using microcrystal electron diffraction (MicroED). However, so far no drug binding interactions could unambiguously be resolved by electron diffraction alone. Here, we use MicroED to study the binding of a sulfonamide inhibitor to human carbonic anhydrase isoform II (HCA II). We show that MicroED data can efficiently be collected on a conventional transmission electron microscope from thin hydrated microcrystals soaked with the clinical drug acetazolamide (AZM). The data are of high enough quality to unequivocally fit and resolve the bound inhibitor. We anticipate MicroED can play an important role in facilitating in-house fragment screening for drug discovery, complementing existing methods in structural biology such as X-ray and neutron diffraction.
Intramolecular crossover from unconventional diamagnetism to paramagnetism of palladium ions probed by soft X-ray magnetic circular dichroism
Authors: Smekhova Alevtina , Schmitz Detlef , Izarova Natalya V. , Stuckart Maria , Shams S. Fatemeh , Siemensmeyer Konrad , de Groot Frank M. F. , Kögerler Paul , Schmitz-Antoniak Carolin
Published: July 2020

The case of palladium(II) ions in molecular polyoxopalladates highlights the importance of accounting not only for nearest neighbour atoms or ions in order to understand, model or predict magnetic characteristics. Here, using site-specific soft X-ray magnetic circular dichroism (XMCD), the effects of different bond lengths, delocalization of 4d electrons, and 4d spin-orbit coupling on the electronic and magnetic properties are investigated and three different states identified: Conventional diamagnetism in a square-planar O4 coordination environment, paramagnetism caused by four additional out-of-plane oxygen anions, and an unusual diamagnetic state in the diamagnetic/paramagnetic crossover region modified by significant mixing of states and facilitated by the substantial 4d spin-orbit coupling. The two diamagnetic states can be distinguished by characteristic XMCD fine structures, thereby overcoming the common limitation of XMCD to ferro-/ferrimagnetic and paramagnetic materials in external magnetic fields. The qualitative interpretation of the results is corroborated by simulations based on charge transfer multiplet calculations and density functional theory results.
The 29F nucleus as a lighthouse on the coast of the island of inversion
Authors: Fortunato L. , Casal J. , Horiuchi W. , Singh Jagjit , Vitturi A.
Published: July 2020

The exotic, neutron-rich and weakly-bound isotope 29F stands out as a waymarker on the southern shore of the island of inversion, a portion of the nuclear chart where the effects of nuclear forces lead to a reshuffling of the single particle levels and to a reorganization of the nuclear structure far from stability. This nucleus has become very popular, as new measurements allow to refine theoretical models. We review the latest developments and suggest how to further assess the structure by proposing predictions on electromagnetic transitions that new experiments of Relativistic Coulomb Excitation should soon become able to measure.
Surface optimization of gold nanoparticle mass tags for the sensitive detection of protein biomarkers via immuno-capture LI-MS
Authors: Tam Toby Siu-Chung , Cheng Yu-Hong , Lok Chun-Nam , Au-Yeung Ho Yu , Ni Wen-Xiu , Wei Xiao-Long , Ng Kwan-Ming
Published: July 2020

Optimal surface functionalization of antibody-conjugated AuNPs for modulating specific versus non-specific interactions to enhance protein detection sensitivity.
In situ amplified QCM immunoassay for carcinoembryonic antigen with colorectal cancer using horseradish peroxidase nanospheres and enzymatic biocatalytic precipitation
Authors: Chi Liangjie , Xu Chao , Li Shuyuan , Wang Xiangyu , Tang Dianping , Xue Fangqin
Published: July 2020

An innovative quartz crystal microbalance immunoassay was designed for detection of carcinoembryonic antigen using horseradish peroxidasenanoparticle as the enhancer, accompanying enzymatic biocatalytic precipitation toward 4-chloro-1-naphthol.
Copper-based metal–organic xerogels on paper for chemiluminescence detection of dopamine
Authors: Zhang Liu , Hou Yue , Lv Congcong , Liu Wei , Zhang Zixuan , Peng Xing
Published: July 2020

Copper(ii)-containing metal–organic xerogels (Cu-MOXs), was produced and Cu-MOXs can catalyze the chemiluminescence of luminol–H2O2 system. Dopamine can be detected with the inhibition effect on Cu-MOXs–luminol–H2O2 system.
Controlled drug delivery for cancer cell treatment via magnetic doxorubicin imprinted silica nanoparticles
Authors: Nerantzaki Maria , Michel Aude , Briot Emmanuel , Siaugue Jean Michel , Ménager Christine , Wilhelm Claire , Griffete Nébéwia
Published: July 2020

Magnetic doxorubicin imprinted silica nanoparticles for remotely triggered doxorubicin release upon applying an alternating magnetic field.
One-pot synthesis of two-dimensional multilayered graphitic carbon nanosheets by low-temperature hydrothermal carbonization using thein situformed copper as a template and catalyst
Authors: Ye Huangqing , Chen Jiahui , Hu Yougen , Li Gang , Fu Xian-Zhu , Zhu Pengli , Sun Rong , Wong Ching-Ping
Published: July 2020

Two-dimensional (2D) multilayered graphitic carbon nanosheets are preparedviaa facile, green, and mild method of one-pot hydrothermal carbonization at a temperature below 300 °C.
Embedding activated carbon nanospheres into polymer-derived porous carbon networks to boost electrocatalytic oxygen reduction
Authors: Wang Zemei , Yu Junchen , Xu Ping , Tan Bien , Wang Jingyu
Published: July 2020

Activated carbon nanospheres were embedded into polymer-derived porous carbon to form heterostructures with improved surface area and ORR performance.
Introducing Na-sufficient P3-Na0.9Fe0.5Mn0.5O2 as a cathode material for Na-ion batteries
Authors: Tripathi Abhinav , Xi Shibo , Gajjela Satyanarayana Reddy , Balaya Palani
Published: July 2020

Earth abundant Fe and Mn based novel P3-type Na-ion layered oxide cathode material with sufficient Na content for full cell application.
In situ AP-XPS analysis of a Pt thin-film sensor for highly sensitive H2 detection
Authors: Toyoshima Ryo , Tanaka Takahisa , Kato Taro , Uchida Ken , Kondoh Hiroshi
Published: July 2020

Changes in surface chemical state of a resistivity-based Pt thin-film sensor for H2 gas were observed under working conditions with direct in situ spectroscopy.
A Janus antimony sulfide catalyst for highly selective N2electroreduction
Authors: Nan Haifeng , Liu Yaping , Li Qingqing , Shen Peng , Chu Ke
Published: July 2020

Sb2S3delivered an excellent NRR faradaic efficiency of 24.1% at −0.3 V, attributed to the Janus role of active Sb centers that contributed to the boosted NRR and the suppressed HER.
Gleaned snapshots on the road to coordination polymers: heterometallic architectures based on Cu(i) metallaclips and 2,2′-bis-dipyrrin metalloligands
Authors: Moutier F. , Khalil A. M. , Baudron S. A. , Lescop C.
Published: July 2020

The assembly of binuclear Cu(i) metallaclips with 2,2′-bis-dipyrrin based metalloligands affords recurrent π-stacked compact tetranuclear metallacycles organizing into discrete or infinite architectures.
Selenium and sulfur inhomogeneity in free-standing ternary Sb2(Se,S)3 alloyed nanorods
Authors: Wang Junli , Guan Fan , Zhao Lijun , Li Longhua , Zhang Junhao , Wang Tingting
Published: July 2020

Chalcogen inhomogeneous distributions, i.e., S decreases but Se increases from the center to the periphery, are found in ternary Sb2(Se,S)3 alloyed nanorods synthesized with SeS2 as a molecular precursor.
Novel alkaline earth metal–organic frameworks with thiophene groups for selective detection of Fe3+
Authors: Yao Jun , Liu Yan-E , Yang Li-Bo , Dou Ai-Na , Hou Cheng-Fu , Xu Quan-Qing , Huang Bo , Zhu Ai-Xin
Published: July 2020

This work demonstrates that the alkaline earth ion radii play an important role in coordination numbers and topologies for constructing MOFs, and these MOFs can be used as fast-response fluorescence sensors for the detection of Fe3+.
Predicted stable Li5P2 and Li4P at ambient pressure: novel high-performance anodes for lithium-ion batteries
Authors: Fei Ge , Duan Shuai , Zhang Mingxin , Ren Zebin , Cui Yangfan , Chen Xin , Liu Yunxian , Yi Wencai , Liu Xiaobing
Published: July 2020

Two novel Li–P states as P3m1 Li5P2 and R3̄m Li4P are predicted to have high battery capacities of 2164 and 3462 mA h g−1, respectively. They can be quenchable down to ambient conditions and are promising candidates for high-performance LIB anode materials.
Triple-bridged helical binuclear copper(i) complexes: Head-to-head and head-to-tail isomerism and the solid-state luminescence
Authors: Shamsieva Aliia V. , Musina Elvira I. , Gerasimova Tatiana P. , Strelnik Igor D. , Strelnik Anna G. , Kolesnikov Ilya E. , Kalinichev Alexey A. , Islamov Daut R. , Samigullina Aida I. , Lönnecke Peter , Katsyuba Sergey A. , Hey-Hawkins Evamarie , Karasik Andrey A. , Sinyashin Oleg G.
Published: July 2020

The current work presents novel dinuclear Cu(i) complexes bearing P,N-ligands. Their structures, isomerization, and photophysical properties are discussed in detail.
Boosting alkaline hydrogen evolution: the dominating role of interior modification in surface electrocatalysis
Authors: Li Zhao , Niu Wenhan , Yang Zhenzhong , Kara Abdelkader , Wang Qi , Wang Maoyu , Gu Meng , Feng Zhenxing , Du Yingge , Yang Yang
Published: July 2020

The alkaline hydrogen evolution reaction (A-HER) holds great promise for clean hydrogen fuel generation but its practical utilization is severely hindered by the sluggish kinetics for water dissociation in alkaline solutions.
Enhanced ion transport by graphene oxide/cellulose nanofibers assembled membranes for high-performance osmotic energy harvesting
Authors: Wu Yadong , Xin Weiwen , Kong Xiang-Yu , Chen Jianjun , Qian Yongchao , Sun Yue , Zhao Xiaolu , Chen Weipeng , Jiang Lei , Wen Liping
Published: July 2020

A nanosheets/nanofibers assembled membrane with low energy barrier, fast ion transport and superior osmotic energy performances is reported.
Air-stable means more: designing air-defendable lithium metals for safe and stable batteries
Authors: Wu Jingyi , Yuan Lixia , Li Zhen , Xie Xiaolin , Huang Yunhui
Published: July 2020

This review summarizes the strategies to simultaneously enhance air/water-resistance and electrochemical performance of lithium metal anodes.
A holistic view of mammalian (vertebrate) cellular iron uptake
Authors: Kosman Daniel J
Published: July 2020

Cell iron uptake in mammals is commonly distinguished by whether the iron is presented to the cell as transferrin-bound or not: TBI or NTBI. This generic perspective conflates TBI with canonical transferrin receptor, endosomal iron uptake, and NTBI with uptake supported by a plasma membrane-localized divalent metal ion transporter, most often identified as DMT1. In fact, iron uptake by mammalian cells is far more nuanced than this somewhat proscribed view suggests. This view fails to accommodate the substantial role that ZIP8 and ZIP14 play in iron uptake, while adhering to the traditional premise that a relatively high endosomal [H+] is thermodynamically required for release of iron from holo-Tf. The canonical view of iron uptake also does not encompass the fact that plasma membrane electron transport – PMET – has long been linked to cell iron uptake. In fact, the known mammalian metallo-reductases – Dcytb and the STEAP proteins – are members of this cohort of cytochrome-dependent oxido-reductases that shuttle reducing equivalents across the plasma membrane. A not commonly appreciated fact is the reduction potential of ferric iron in holo-Tf is accessible to cytoplasmic reducing equivalents – reduced pyridine and flavin mono- and di-nucleotides and dihydroascorbic acid. This allows for the reductive release of Fe2+ at the extracellular surface of the PM and subsequent transport into the cytoplasm by a neutral pH transporter – a ZIP protein. What this perspective emphasizes is that there are two TfR-dependent uptake pathways, one which does and one which does not involve clathrin-dependent, endolysosomal trafficking. This raises the question as to the selective advantage of having two Tf, TfR-dependent routes of iron accumulation. This review of canonical and non-canonical iron uptake uses cerebral iron trafficking as a point of discussion, a focus that encourages inclusion also of the importance of ferritin as a circulating ‘chaperone’ of ferric iron.
Synthesis of hydrophobically modified berberine derivatives with high anticancer activity through modulation of the MAPK pathway
Authors: Wang Lizhen , Yang Xueliang , Li Xiaobin , Stoika Rostyslav , Wang Xue , Lin Houwen , Ma Yukui , Wang Rongchun , Liu Kechun
Published: July 2020

Linoleic acid-modified berberine derivative induces apoptosis of A549 cells and affects the expression of proteins associated with the MAPK pathway.
Charge transport in phenazine-fused triphenylene discotic mesogens doped with CdS nanowires
Authors: Shah Asmita , Duponchel Benoit , Gowda Ashwathanarayana , Kumar Sandeep , Becuwe Matthieu , Davoisne Carine , Legrand Christian , Douali Redouane , Singh Dharmendra Pratap
Published: July 2020

We report the synthesis of oleylamine capped CdS nanowires and we have dispersed a small optimized amount of these NWs in the Colh phase of a recently synthesized phenazine-fused-triphenylene discotic liquid crystal to understand the temperature-dependent charge transport.
S-Doped hierarchical graphene decorated with Co-porphyrins as an efficient electrocatalyst for zinc–air batteries
Authors: Peng Zhi-Jie , Zhao Jiao , Gu Lei , Sun Xuan-Long , Jia Hai-Lang , Guan Ming-Yun , Ma Shuai-Shuai
Published: July 2020

The ORR catalyst Por/S/rGO was prepared by S-doping and compositing with cobalt porphyrin, and the highly dispersed cobalt porphyrin greatly improved the catalytic performance.
Coinage metal metallacycles involving a fluorinated 3,5-diarylpyrazolate
Authors: Lakhi Jaspreet S. , Patterson Monika R. , Dias H. V. Rasika
Published: July 2020

Photoluminescent, trinuclear, coinage metal pyrazolates have been isolated using a fluorinated diaryl-pyrazolate.
Sensitization of drug resistant sarcoma tumors by membrane modulationviashort chain sphingolipid-containing nanoparticles
Authors: Zalba Sara , Seynhaeve Ann L. B. , Brouwers Jos F. , Süss Regine , Verheij Marcel , ten Hagen Timo L. M.
Published: July 2020

Mechanism of Doxorubicin (Dxr) entrance in resistant cells under treatment with Short chain sphingolipid (SCS) liposomes. SCS form channels in the membrane that allow the internalization of Dxr.
Pd nanoparticles deposited on Co(OH)2 nanoplatelets as a bifunctional electrocatalyst and their application in Zn–air and Li–O2 batteries
Authors: Hyun Suyeon , Saejio Apichat , Shanmugam Sangaraju
Published: July 2020

The Pd/Co(OH)2 nanohybrid as a highly efficient oxygen bifunctional electrocatalyst is presented and further demonstrated in a rechargeable Zn–air and Li–O2 battery as an air cathode.
Crosslinkable metal chelate as the electron transport layer for efficient and stable inverted polymer solar cells
Authors: Liu Hao , Ma Zongwen , Yu Runnan , Gao Huaizhi , Lin Jun , Hayat Tasawar , Alsaedi Ahmed , Tan Zhan’ao
Published: July 2020

Efficient inverted polymer solar cells with crosslinked Hf(ACBV)4 as the ETL are demonstrated, exhibiting excellent operation stability under 20 hours continuous illumination in air.
Spirodesertols A and B, two highly modified spirocyclic diterpenoids with an unprecedented 6-isopropyl-3H-spiro[benzofuran-2,1′-cyclohexane] motif from Salvia deserta
Authors: Zheng Guijuan , Kadir Abdukriem , Zheng Xiaofeng , Jin Pengfei , Liu Junjun , Maiwulanjiang Maitinuer , Yao Guangmin , Aisa Haji Akber
Published: July 2020

Two highly modified spirocyclic diterpenoids with an unprecedented 6-isopropyl-3H-spiro[benzofuran-2,1′-cyclohexane] motif and four new icetexane diterpenoids were isolated from Salvia deserta. 1 showed more potent cytotoxicity than cis-platin.
The mechanism of photogenerated minority carrier movement in organic phototransistors
Authors: Han Tao , Sun Linshan , Feng Qirui , Cao Kun , Ding Shufang , Jin Gui , Jiang Chunzhi , Huang Xiaoyi
Published: July 2020

A continuous transmission channel of minority carrier forms under high concentration acceptor doping, leading to poor phototransistor performance. However, the minority carrier cannot move under low acceptor doping, promoting the device performance.
Does the mean-fieldαeffect have any impact on the memory of the solar cycle?
Authors: Hazra Soumitra , Brun Allan Sacha , Nandy Dibyendu
Published: July 2020

Context.Predictions of solar cycle 24 obtained from advection-dominated and diffusion-dominated kinematic dynamo models are different if the Babcock–Leighton mechanism is the only source of the poloidal field. Some previous studies argue that the discrepancy arises due to different memories of the solar dynamo for advection- and diffusion-dominated solar convection zones.

Aims.We aim to investigate the differences in solar cycle memory obtained from advection-dominated and diffusion-dominated kinematic solar dynamo models. Specifically, we explore whether inclusion of Parker’s mean-fieldαeffect, in addition to the Babcock–Leighton mechanism, has any impact on the memory of the solar cycle.

Methods.We used a kinematic flux transport solar dynamo model where poloidal field generation takes place due to both the Babcock–Leighton mechanism and the mean-fieldαeffect. We additionally considered stochastic fluctuations in this model and explored cycle-to-cycle correlations between the polar field at minima and toroidal field at cycle maxima.

Results.Solar dynamo memory is always limited to only one cycle in diffusion-dominated dynamo regimes while in advection-dominated regimes the memory is distributed over a few solar cycles. However, the addition of a mean-fieldαeffect reduces the memory of the solar dynamo to within one cycle in the advection-dominated dynamo regime when there are no fluctuations in the mean-fieldαeffect. When fluctuations are introduced in the mean-field poloidal source a more complex scenario is evident, with very weak but significant correlations emerging across a few cycles.

Conclusions.Our results imply that inclusion of a mean-fieldαeffect in the framework of a flux transport Babcock–Leighton dynamo model leads to additional complexities that may impact memory and predictability of predictive dynamo models of the solar cycle.
First detection of 13CH in the interstellar medium
Authors: Jacob Arshia M. , Menten Karl M. , Wiesemeyer Helmut , Güsten Rolf , Wyrowski Friedrich , Klein Bernd
Published: July 2020

In recent years, a plethora of observations with high spectral resolution of sub-millimetre and far-infrared transitions of methylidene (CH), conducted with Herschel and SOFIA, have demonstrated this radical to be a valuable proxy for molecular hydrogen that can be used for characterising molecular gas within the interstellar medium on a Galactic scale, including the CO-dark component. We report the discovery of the 13CH isotopologue in the interstellar medium using the upGREAT receiver on board SOFIA. We have detected the three hyperfine structure components of the ≈2 THz frequency transition from its X2Π1∕2 ground-state towards the high-mass star-forming regions Sgr B2(M), G34.26+0.15, W49(N), and W51E and determined 13CH column densities. The ubiquity of molecules containing carbon in the interstellar medium has turned the determination of the ratio between the abundances of the two stable isotopes of carbon, 12C/13C, into a cornerstone for Galactic chemical evolution studies. Whilst displaying a rising gradient with galactocentric distance, this ratio, when measured using observations of different molecules (CO, H2CO, and others), shows systematic variations depending on the tracer used. These observed inconsistencies may arise from optical depth effects, chemical fractionation, or isotope-selective photo-dissociation. Formed from C+ either through UV-driven or turbulence-driven chemistry, CH reflects the fractionation of C+, and does not show any significant fractionation effects, unlike other molecules that were previously used to determine the 12C/13C isotopic ratio. This makes it an ideal tracer for the 12C/13C ratio throughout the Galaxy. By comparing the derived column densities of 13CH with previously obtained SOFIA data of the corresponding transitions of the main isotopologue 12CH, we therefore derive 12C/13C isotopic ratios toward Sgr B2(M), G34.26+0.15, W49(N) and W51E. Adding our values derived from 12∕13CH to previous calculations of the Galactic isotopic gradient, we derive a revised value of 12C/13C = 5.87(0.45)RGC + 13.25(2.94).
The ALPINE-ALMA [CII] survey
Authors: Ginolfi M. , Jones G. C. , Béthermin M. , Faisst A. , Lemaux B. C. , Schaerer D. , Fudamoto Y. , Oesch P. , Dessauges-Zavadsky M. , Fujimoto S. , Carniani S. , Le Fèvre O. , Cassata P. , Silverman J. D. , Capak P. , Yan Lin , Bardelli S. , Cucciati O. , Gal R. , Gruppioni C. , Hathi N. P. , Lubin L. , Maiolino R. , Morselli L. , Pelliccia D. , Talia M. , Vergani D. , Zamorani G.
Published: July 2020

We present ALMA observations of a merging system atz ∼ 4.57, observed as a part of the ALMA Large Program to INvestigate [CII] at Early times (ALPINE) survey. Combining ALMA [CII]158 μm and far-infrared continuum data with multi-wavelength ancillary data, we find that the system is composed of two massive (M⋆ ≳ 1010 M⊙) star-forming galaxies experiencing a major merger (stellar mass ratiormass ≳ 0.9) at close spatial (∼13 kpc; projected) and velocity (Δv <  300 km s−1) separations, and two additional faint narrow [CII]-emitting satellites. The overall system belongs to a larger scale protocluster environment and is coincident to one of its overdensity peaks. Additionally, ALMA reveals the presence of [CII] emission arising from a circumgalactic gas structure, extending up to a diameter-scale of ∼30 kpc. Our morpho-spectral decomposition analysis shows that about 50% of the total flux resides between the individual galaxy components, in a metal-enriched gaseous envelope characterised by a disturbed morphology and complex kinematics. Similarly to observations of shock-excited [CII] emitted from tidal tails in local groups, our results can be interpreted as a possible signature of interstellar gas stripped by strong gravitational interactions, with a possible contribution from material ejected by galactic outflows and emission triggered by star formation in small faint satellites. Our findings suggest that mergers could be an efficient mechanism of gas mixing in the circumgalactic medium around high-zgalaxies, and thus play a key role in the galaxy baryon cycle at early epochs.
γ-ray/infrared luminosity correlation of star-forming galaxies
Authors: Kornecki P. , Pellizza L. J. , del Palacio S. , Müller A. L. , Albacete-Colombo J. F. , Romero G. E.
Published: July 2020

Context. Nearly a dozen star-forming galaxies have been detected in γ-rays by the Fermi observatory in the last decade. A remarkable property of this sample is the quasi-linear relation between the γ-ray luminosity and the star formation rate, which was obtained assuming that the latter is well traced by the infrared luminosity of the galaxies. The non-linearity of this relation has not been fully explained yet.

Aims. We aim to determine the biases derived from the use of the infrared luminosity as a proxy for the star formation rate and to shed light on the more fundamental relation between the latter and the γ-ray luminosity. We expect to quantify and explain some trends observed in this relation.

Methods. We compiled a near-homogeneous set of distances, ultraviolet, optical, infrared, and γ-ray fluxes from the literature for all known γ-ray emitting, star-forming galaxies. From these data, we computed the infrared and γ-ray luminosities, and star formation rates. We determined the best-fitting relation between the latter two, and we describe the trend using simple, population-orientated models for cosmic-ray transport and cooling.

Results. We find that the γ-ray luminosity–star formation rate relation obtained from infrared luminosities is biased to shallower slopes. The actual relation is steeper than previous estimates, having a power-law index of 1.35 ± 0.05, in contrast to 1.23 ± 0.06.

Conclusions. The unbiased γ-ray luminosity–star formation rate relation can be explained at high star formation rates by assuming that the cosmic-ray cooling region is kiloparsec-sized and pervaded by mild to fast winds. Combined with previous results about the scaling of wind velocity with star formation rate, our work provides support to advection as the dominant cosmic-ray escape mechanism in galaxies with low star formation rates.
Dynamical traceback age of theβPictoris moving group
Authors: Miret-Roig N. , Galli P. A. B. , Brandner W. , Bouy H. , Barrado D. , Olivares J. , Antoja T. , Romero-Gómez M. , Figueras F. , Lillo-Box J.
Published: July 2020

Context.TheβPictoris moving group is one of the most well-known young associations in the solar neighbourhood and several members are known to host circumstellar discs, planets, and comets. Measuring its age precisely is essential to the study of several astrophysical processes, such as planet formation and disc evolution, which are strongly age-dependent.

Aims.We aim to determine a precise and accurate dynamical traceback age for theβPictoris moving group.

Methods.Our sample combines the extremely preciseGaiaDR2 astrometry with ground-based radial velocities measured in an homogeneous manner. We use an updated version of our algorithm to determine dynamical ages. The new approach takes into account a robust estimate of the spatial and kinematic covariance matrices of the association to improve the sample selection process and to perform the traceback analysis.

Results.We estimate a dynamical age of 18.5−2.4+2.0Myr for theβPictoris moving group. We investigated the spatial substructure of the association at the time of birth and we propose the existence of a core of stars that is more concentrated. We also provide precise radial velocity measurements for 81 members ofβPic, including ten stars with the first determinations of their radial velocities.

Conclusions.Our dynamical traceback age is three times more precise than previous traceback age estimates and, more importantly, for the first time it reconciles the traceback age with the most recent estimates of other dynamical, lithium depletion boundaries and isochronal ages. This has been possible thanks to the excellent astrometric and spectroscopic precisions, the homogeneity of our sample, and the detailed analysis of binaries and membership.
Some isoperimetric inequalities with respect to monomial weights
Authors: Alvino Angelo , Brock Friedemann , Chiacchio Francesco , Mercaldo Anna , Posteraro Maria Rosaria
Published: July 2020

We solve a class of isoperimetric problems on ℝ+2with respect to monomial weights. Letαandβbe real numbers such that 0 ≤α<β+ 1,β≤ 2α. We show that, among all smooth sets Ω in ℝ+2with fixed weighted measure ∬Ωyβdxdy, the weighted perimeter ∫∂Ωyαdsachieves its minimum for a smooth set which is symmetric w.r.t. to they-axis, and is explicitly given. Our results also imply an estimate of a weighted Cheeger constant and a bound for eigenvalues of some nonlinear problems.
Capacity Configuration of Battery Energy Storage System for Photovoltaic Generation System Considering the High Chargerate
Authors: Li Jiaming , Qiao Ying , Liu Guojing , Lu Zongxiang
Published: July 2020

Battery energy storage system (BESS) is one of the important solutions to improve the accommodation of large-scale grid connected photovoltaic (PV) generation and increase its operation economy. However, the strong intra-day volatility and severe curtailment of PV power sets a high demand of BESS charge-rate that is a key factor in operation models but ignored in current planning researches. This paper proposes a BESS capacity configuration model for PV generation systems which takes BESS’s ability to (dis)charge exceeds its rated power into account. The best charge-rate and power & energy capacity of BESS are optimized by particle swarm optimization (PSO) algorithm. Through an analysis of the annual output statistics of PV power station in the northwest of China, the results show that when considering the high charge-rate of BESS, the optimal BESS capacity configuration rises and comprehensive income of the PV-BESS system will increase.
Modeling of Photovoltaic MPPT Lead Acid Battery Charge Controller for Standalone System Applications
Authors: Tan Rodney H.G. , Er Chee Kang , Solanki Sunil G.
Published: July 2020

This paper presents the circuitry modeling of the solar photovoltaic MPPT lead-acid battery charge controller for the standalone system in MATLAB/Simulink environment. A buck topology is utilized as a DC-DC converter for the charge controller implementation. The maximum power of the photovoltaic panel is tracked by the Perturb and Observe MPPT algorithm. The battery charge controller charges the lead-acid battery using a three-stage charging strategy. The three charging stages include the MPPT bulk charge, constant voltage absorption charge, and float charge stage. The performance analysis of the model is carried out in the following aspects, there are MPPT tracking performance, battery charging performance and overall charge controller efficiency performance are benchmarked with commercial MPPT charge controller for validation. The performance result shows that the MPPT is capable to track to the PV panel maximum point at any solar irradiance variation within 0.5 seconds with maximum power tracking efficiency up to 99.9 %. The three-stage charging strategy also successfully demonstrated. The overall charge controller average efficiency achieved up to 98.3 % which matches many high end commercial solar PV MPPT charge controller product specifications. This validated model contributes to a better sizing of PV panel and battery energy storage for the small and medium standalone PV system.
Performance of heat pump system for water heating in European climate
Authors: Kachalouski Yauheni , Tomáš Matuška
Published: July 2020

A performance of air-to-water and brine-to-water heat pump for domestic hot water preparation was analyzed in different climates of Europe. Air-source heat pumps are widely used energy source for domestic applications with low operation costs. Their system SPF was found at level of 3.0 for domestic hot water preparation for medium latitudes in Europe. Investigations on the ground-source heat pump performance show their average SPF are close to air-source technology.
Anästhesiologisches Management von herz- und lungentransplantierten Patienten
Authors: Karsten Jan
Published: July 2020

Die Zahl herz- und lungentransplantierter Patienten wächst stetig und ihre Lebenserwartung steigt. Somit nimmt auch die Wahrscheinlichkeit zu, dass einige dieser Patienten Komorbiditäten entwickeln, die einen chirurgischen Eingriff erfordern. Das perioperative anästhesiologische Management herz- und lungentransplantierter Patienten ist eine große Herausforderung – dieser Beitrag gibt einen Überblick.
Hirntod und Umgang mit (potenziellen) Organspendern und Angehörigen
Authors: Ungerer Matthias N. , Schönenberger Silvia , Barreiros Ana Paula , Blaes-Eise Anne-Bärbel , Rahmel Axel
Published: July 2020

In den letzten Jahren hat die Diagnose des irreversiblen Hirnfunktionsausfalls bei schwer hirngeschädigten Patienten an Bedeutung gewonnen. Der Hirntod, definiert als nicht behebbarer Ausfall der Gesamtfunktion des Großhirns, des Kleinhirns und des Hirnstamms, ist Voraussetzung zur Organentnahme im Rahmen einer Organspende. Der Artikel stellt die gesetzlichen und organisatorischen Rahmenbedingungen vor.
Dermatochirurgische Übertherapie eines Naevuszellnaevus als Behandlungsfehler
Authors: Elsner P.
Published: July 2020

Ein Patient hatte die Zahlung der Arztrechnung eines Dermatologen verweigert, weil er die Exzision eines „bedenklichen“ Naevuszellnaevus am Rücken mit Deckung des Defektes mittels Verschiebelappenplastik als unangemessen groß bemängelte. Erst nach 5 Jahren klagte er auf Schadensersatz und Schmerzensgeld beim zuständigen Landgericht, das die Klage mit Hinweis auf die zwischenzeitlich eingetretene Verjährung ablehnte. Im Berufungsverfahren gab das Oberlandesgericht der Klage jedoch statt und stellte fest, dass es behandlungsfehlerhaft sei, wenn ein Hautarzt ein Muttermal von 5 mm im Durchmesser entfernt und die Wunde mittels einer Lappenplastik so verschließt, dass es zu einer Narbenlänge von 16 cm kommt. Auch beginnt die Verjährungsfrist nach einem Behandlungsfehler erst dann, wenn der Patient als medizinischer Laie Kenntnis von Tatsachen erlangt, aus denen sich ergibt, dass der Arzt von dem üblichen ärztlichen Vorgehen abgewichen war oder Maßnahmen nicht getroffen hatte, die nach ärztlichem Standard zur Vermeidung oder Beherrschung von Komplikationen erforderlich gewesen wären.

Leitliniengerecht sollten Dermatologen in einem zweizeitigen Vorgehen klinisch suspekte Naevuszellnaevi eng umschrieben exzidieren und erst bei Vorliegen eines dermatohistologisch nachgewiesenen malignen Melanoms eine Nachexzision mit den empfohlenen Sicherheitsabständen je nach der Tumordicke nach Breslow von 1 – 2 cm und dann entsprechend erforderlicher Defektdeckung durchführen.
Lipatrophie nach Triamcinolon-Injektion
Authors: Elsner P. , Meyer J.
Published: July 2020

Eine Patientin wurde vom Hausarzt aufgrund einer Rhinitis allergica mittels einer Injektion mit Triamcinolon intramuskulär im Bereich des Oberarms behandelt. Im Injektionsbereich wurde 9 Monate später eine 5 cm im Durchmesser große Lipathrophie nachgewiesen.

Die Schlichtungsstelle bejahte einen ärztlichen Behandlungsfehler. Die parenterale Verabreichung von Kortikosteroiden vom Typ Triamcinolon-Depot sollte Situationen vorbehalten bleiben, in denen eine lokale bzw. orale Therapie nicht durchführbar oder kein ausreichender Therapieeffekt zu erzielen ist; es war jedoch weder die Schwere der allergischen Rhinitis noch eine vorherige Behandlung mit laut Fachstandard zunächst empfohlenen lokalen bzw. systemischen Antiallergika dokumentiert. Zudem war maßgeblich für die Verursachung der Komplikation einer aseptischen Lipatrophie die fehlerhafte Injektionstechnik sowohl bez. der Tiefe als auch des Injektionsortes zu beanstanden.

Die intra- und/oder subkutane Injektion einer Triamcinolon-Kristallsuspension hat ein hohes Risikopotenzial, eine langanhaltende Atrophie der Dermis oder des subkutanen Fettgewebes zu verursachen. Die gluteal tief intramuskuläre Anwendung von Triamcinolonacetonid für die Therapie der allergischen Rhinitis ist nur zugelassen, wenn diese einen schweren Verlauf zeigt und eine leitliniengerechte Lokaltherapie versagt hat. Diese Indikationseinschränkungen sollten streng beachtet und Patienten über das Nebenwirkungspotenzial der Therapie rechtswirksam aufgeklärt werden.
Prenatal Diagnosis of Vein of Galen Aneurysmal Malformation Allows Early Transumbilical Endovascular Treatment
Authors: Demartini Zeferino , Koppe Gelson Luis , Gatto Luana A.M. , Sarquis Ana Lucia , Francisco Alexandre N. , Cardoso-Demartini Adriane
Published: July 2020

Neonates with vein of Galen aneurysmal malformation (VGAM) presenting with severe cardiac failure and pulmonary hypertension represent a challenge for endovascular therapy. When early treatment is required, the small femoral arteries in this population are usually difficult to cannulate. Alternatively, the umbilical vessels offer a natural pathway to reach the lesion. Therefore, prenatal diagnosis of VGAM allows for delivery planning, perinatal management, and embolization through umbilical approach, thus leading to better outcomes.
Intractable Scapular Pain Due to Undiagnosed Osteoid Osteoma: A Case Report
Authors: Veerapaneni Karthika , Veerapaneni Poornachand , Kapoor Nidhi , Samant Rohan S , Yadala Sisira , Sheng Sen , Nalleballe Krishna
Published: July 2020

A 36-year-old female patient presented to our stroke neurology clinic for progressively worsening intractable, sharp, shooting interscapular pain radiating to the right shoulder and neck, which she had experienced for 4 years. She had previously seen an orthopedist and was referred to a neurosurgeon for surgical intervention after an MRI of the cervical spine showed the C3–C4 right vertebral artery loop protruding into the right C3–C4 neural foramen and compressing the exiting C4 nerve root. MR neurography showed a stable tortuous right vertebral artery loop, causing a mass effect on the dorsal root ganglion. A neuroforaminal decompression surgery was planned. However, the patient visited our stroke neurology clinic for a second opinion before surgery. An MRI of the thoracic spine showed an enhancing soft tissue mass at the right T4–T5 pedicles and adjacent body. A chest CT with contrast showed a 1 cm radiolucent lesion in the superior articular facet of T5, which represented a nidus. A technetium bone scan showed focal increased uptake within the right T5 pedicle, which is indicative of osteoid osteoma. The patient underwent laminectomy/resection and was pain-free at a 6-month follow-up; biopsy confirmed osteoid osteoma. This case illustrates the importance of neurolocalization during diagnostic testing.
Modified Ipsilateral Endonasal Endoscopic Trans-Sphenoidal Approach to Sphenoid Sinus Lateral Recess Cerebrospinal Fluid Leak Management in Two Cases: A Technical Note
Authors: Rai Survendra Kumar R. , Dandpat Saswat Kumar
Published: July 2020

Background Cerebrospinal fluid (CSF) leak from the sphenoid sinus lateral recess (SSLR) is very rare. Majority prefer transpterygoid approach which is extensive and time consuming. Two such cases were managed with least possible dissection/destruction of paranasal sinus.

Methods Two cases of SSLR were accessed through the ipsilateral nostril from the side of CSF leak. Wide ipsilateral anterior sphenoidotomy was done preserving intersinus septum of sphenoid sinus. Middle turbinate was lateralized and remaining paranasal structures were preserved. Two handed single nostril approach was done in both the cases by 45- and 70-degree endoscope along with angled instruments. SSLR defects were visualized and packed with autologous fat graft and glue.

Results SSLR defects could be visualized and packed with fat graft in both the cases from ipsilateral side. Both cases had uneventful outcome with no leak with mean ­follow-up of 11.5 months.

Conclusion Modified ipsilateral endonasal endoscopy trans-sphenoidal approach is least invasive technique for SSLR leak. Use of angled scope and instruments help in defect visualization, avoiding extensive paranasal sinus dissection and bony removal. Tedious time-consuming reconstructive procedures can be avoided with simple fat graft with good outcome.
Nodal and Pedal MR Lymphangiography of the Central Lymphatic System: Techniques and Applications
Authors: Pieper Claus Christian
Published: July 2020

Novel lymphatic imaging and interventional techniques are increasingly used in the diagnostic workup and treatment of pathologies of the central lymphatic system and have opened a new field of interventional radiology. The mainstay of lymphatic imaging today is magnetic resonance lymphangiography (MRL). It provides information on the anatomy of the central lymphatic system, lymphatic flow, as well as lymphatic pathologies and therefore is a valuable tool for treatment planning. There are two techniques to perform contrast-enhanced MRL: nodal dynamic contrast-enhanced MRL (nodal DCE-MRL) and interstitial transpedal MRL (tMRL). Nodal DCE-MRL yields superior information on lymphatic flow dynamics and is therefore best suited for suspected lymphatic flow pathologies and lymphatic malformations. tMRL is a technically simpler alternative for central lymphatic visualization without the need for sonographically guided lymph node cannulation. This review article describes current MRL techniques with a focus on contrast-enhanced MRL, their specific advantages, and possible clinical applications in patients suffering from pathologies of the central lymphatic system.
Complications during Lymphangiography and Lymphatic Interventions
Authors: Majdalany Bill S. , Sanogo Mamadou L. , Pabon-Ramos Waleska M. , Wilson Kyle A. , Goswami Abhishek K. , Kokabi Nima , Khaja Minhaj S.
Published: July 2020

Lymphangiography as a diagnostic procedure dates back to the 1950s and was widely performed for several decades until being supplanted by other advanced imaging techniques. With the advent of thoracic duct embolization to treat chylothorax, Constantin Cope ushered in a transition from lymphangiography as a diagnostic procedure to a precursor for lymphatic intervention. Subsequently, technical modifications and applications of lymphatic embolization to other medical conditions have greatly expanded the scope and application of lymphangiography and lymphatic intervention. Although there is increasing familiarity with lymphatic interventions, few interventionalists have performed a high enough volume to be aware of potential complications and their management. Potential complications of lymphangiography and those encountered while performing lymphatic interventions are discussed along with approaches to minimize their risk and management strategies should they occur.
Leptomeningeal Carcinomatosis Secondary to Esophageal Cancer Diagnosed on Cytology
Authors: Jagtap Sunil Vitthalrao , Khoja Shoaib , Jagtap Shubham S. , Gudur Rashmi , Janugade Hemant
Published: July 2020

Esophageal carcinoma is considered a common malignancy across the globe. These patients usually present with an advanced stage of the disease at the time of diagnosis. Herein, we report a 55-year male patient who presented with leptomeningeal carcinomatosis, detected on cerebrospinal fluid (CSF) cytology in a case of adenocarcinoma lower third esophagus. On radiological imaging, he also had extensive metastatic deposits in the liver, pleura, and regional and paravertebral lymph nodes.
Is Preimplantation Genetic Testing Associated with Increased Risk of Abnormal Placentation After Frozen Embryo Transfer?
Authors: Swanson Kate , Huang David , Kaing Amy , Blat Cinthia , Rosenstein Melissa G. , Mok-Lin Evelyn , Gras Joanne , Sperling Jeffrey D.
Published: July 2020

Objective This study aimed to assess the association of preimplantation genetic testing (PGT) with abnormal placentation among a cohort of pregnancies conceived after frozen embryo transfer (FET).

Study Design This is a retrospective cohort study of women who conceived via FET at the University of California, San Francisco from 2012 to 2016 with resultant delivery at the same institution. The primary outcome was abnormal placentation, including placenta accreta, retained placenta, abruption, placenta previa, vasa previa, marginal or velamentous cord insertion, circumvallate placenta, circummarginate placenta, placenta membranacea, bipartite placenta, and placenta succenturiata. Diagnosis was confirmed by reviewing imaging, delivery, and pathology reports. Our secondary outcome was hypertensive disease of pregnancy.

Results A total of 311 pregnancies were included in analysis; 158 (50.8%) underwent PGT. Baseline demographic characteristics were similar between groups except for age at conception and infertility diagnosis. Women with PGT were more likely to undergo single embryo transfer (82.3 vs. 64.1%, p < 0.001). There were no statistically significant differences in the rate of the primary outcome (26.6 vs. 27.4%, p = 0.86) or hypertensive disorders of pregnancy (33.5 vs. 33.3%, p = 0.97), which remained true after multivariate analysis was performed.

Conclusion Among pregnancies conceived after FET, PGT is not associated with a statistically significant increased risk of abnormal placentation or hypertensive disorders of pregnancy.

Key Points