bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Non‐innocence of Phosphaquinodimethane Ligands when Charge and Aromaticity Come into Play
Authors: Junker Philip , Rey Planells Alicia , Espinosa Ferao Arturo , Streubel Rainer 
Published: April 2021

AbstractSeveral phosphaquinodimethanes and their M(CO)5 complexes (M=Cr, Mo, W) and model derivatives have been theoretically investigated regarding the quest of non‐innocence. Computed structural and electronic properties of the P‐Me/NH2 substituted phosphaquinodimethanes and tungsten complexes revealed an interesting non‐innocent ligand behaviour for the radical anion complexes with distonic ion character and a strong rearomatization of the middle phenyl ring. The latter was further probed taking also geometric aromaticity (HOMA) and quinoid distortion parameters (HOMQc) into account, as well as NICS(1). Furthermore, the effect of the P‐substitution was investigated for real (or plausible) complexes and their free ligands focusing on the resulting aromaticity at the middle phenyl ring and vertical one‐electron redox processes. The best picture of ligand engagement in redox changes was provided by representing NICS(1) values versus HOMA and the new geometric distortion parameter HOMQc8.
CO2 Capture by Hydroxylated Azine‐Based Covalent Organic Frameworks
Authors: Maia Renata Avena , Lopes Oliveira Felipe , Ritleng Vincent , Wang Qiang , Louis Benoît , Mothé Esteves Pierre 
Published: April 2021

AbstractCovalent organic frameworks (COFs) RIO‐13, RIO‐12, RIO‐11, and RIO‐11m were investigated towards their CO2 capture properties by thermogravimetric analysis at 1 atm and 40 °C. These microporous COFs bear in common the azine backbone composed of hydroxy‐benzene moieties but differ in the relative number of hydroxyl groups present in each material. Thus, their sorption capacities were studied as a function of their textural and chemical properties. Their maximum CO2 uptake values showed a strong correlation with an increasing specific surface area, but that property alone could not fully explain the CO2 uptake data. Hence, the specific CO2 uptake, combined with DFT calculations, indicated that the relative number of hydroxyl groups in the COF backbone acts as an adsorption threshold, as the hydroxyl groups were indeed identified as relevant adsorption sites in all the studied COFs. Additionally, the best performing COF was thoroughly investigated, experimentally and theoretically, for its CO2 capture properties in a variety of CO2 concentrations and temperatures, and showed excellent isothermal recyclability up to 3 cycles.
DNA‐Encoded Libraries: Hydrazide as a Pluripotent Precursor for On‐DNA Synthesis of Various Azole Derivatives
Authors: Ma Fei , Li Jie , Zhang Shuning , Gu Yuang , Tan Tingting , Chen Wanting , Wang Shuyue , Ma Peixiang , Xu Hongtao , Yang Guang , Lerner Richard A. 
Published: April 2021

AbstractDNA‐encoded combinatorial chemical library (DEL) technology, an approach that combines the power of genetics and chemistry, has emerged as an invaluable tool in drug discovery. Skeletal diversity plays a fundamental importance in DEL applications, and relies heavily on novel DNA‐compatible chemical reactions. We report herein a phylogenic chemical transformation strategy using DNA‐conjugated benzoyl hydrazine as a common versatile precursor in azole chemical expansion of DELs. DNA‐compatible reactions deriving from the common benzoyl hydrazine precursor showed excellent functional group tolerance with exceptional efficiency in the synthesis of various azoles, including oxadiazoles, thiadiazoles, and triazoles, under mild reaction conditions. The phylogenic chemical transformation strategy provides DELs a facile way to expand into various unique chemical spaces with privileged scaffolds and pharmacophores.
Neue Lösung für vorausschauende Wartung
Authors: Huber Cornelia 
Published: April 2021

AbstractBei der Echtzeit‐Datenanalyse identifiziert ABB Ability Condition Monitoring for measurement devices Probleme von Messgeräten frühzeitig und macht so auf wichtige oder unerwünschte Änderungen des Gerätezustands aufmerksam.
Funktionale Sicherheit für Tankanlagen
Authors: Garbsch Matthias 
Published: April 2021

AbstractDie Themen SIL (Safety Integrity Level) und PL (Performance Level) gewinnen in der Prozessindustrie und im Maschinen‐ und Anlagenbau eine immer wesentlichere Bedeutung. Doch Anwender stehen in der Praxis hier oft vor komplexen Herausforderungen. JUMO bünd
Wertvolle Unterstützung
Authors: Schulte Manfred 
Published: April 2021

AbstractIm Zusammenhang mit der CE‐Kennzeichnung einer Gesamtheit von Maschinen, die für den Eigengebrauch hergestellt wird, stellt sich oftmals die Frage, wie die rechtlichen Anforderungen der Richtlinie 2006/42/EG für Maschinen (MRL) eingehalten sowie damit ver
Kleine Box mit großem Inhalt
Authors: Krause Peter 
Published: April 2021

AbstractMit digital vernetzter Filtertechnik lassen sich optimale Prozesse gestalten und Mehrwertdienste generieren. Dazu notwendig ist ein Filtercontroller, der in Kombination mit zusätzlicher Sensorik und einer IT‐Infrastruktur Prozessparameter in Echtzeit visu
Fördergeld für Energiesparer
Authors: Jeschabek Ralph 
Published: April 2021

AbstractDie Firma Ziegler fertigt hochpräzise Komponenten für die Flugzeug‐ und Automobilindustrie. Druckluft ist dabei in allen Maschinen im Einsatz. Weil deren Anzahl mit den Jahren zunahm, stießen die bisherigen vier Schraubenkompressoren an ihre Grenzen. ALMi
Latente Talente
Authors: Ruppelt Erwin 
Published: April 2021

AbstractVielen ist inzwischen bekannt, dass Druckluft, die in der Industrie eingesetzt wird, aus wirtschaftlichen Gesichtspunkten so gut wie immer aufbereitet werden sollte. Kältetrocknung ist dabei das wichtigste Aufbereitungsverfahren. Neue Technologien ermögli
Variantenreich
Authors: Meißler Sebastian 
Published: April 2021

AbstractAuch bei der Steuerung von Gebläsen und Kompressoren bietet die Integration digitaler Anwendungen ein großes Potenzial zur Steigerung der Maschinenverfügbarkeit, Ausfallsicherheit und Informationstransparenz in der übergeordneten Steuerung des Maschinenbe
Design, Synthesis and Biological Evaluation of Novel α‐Acyloxycarboxamide‐Based Derivatives as c‐Met Inhibitors
Authors: Feng Yu‐juan , Ren Yu‐Lin , Zhao Li‐Ming , Xue Guo‐Qiang , Yu Wen‐Hao , Yang Jia‐Qi , Liu Jun‐Wei 
Published: April 2021

Main observation and conclusionDysregulated HGF/c‐Met signalling has been associated with many human cancers, poor clinical outcomes, and even resistance acquisition to some approved targeted therapies. As such, c‐Met kinase has emerged as an attractive target for anticancer drug discovery. Herein, a series of 6,7‐disubstitued‐4‐(2‐fluorophenoxy)quinoline derivatives bearing α‐acyloxycarboxamide moiety were designed, synthesized via Passerini reaction as the key step, and evaluated for their in vitro biological activities against c‐Met kinase and five selected cancer cell lines. The preliminary structure‐activity relationship demonstrated that α‐acyloxycarboxamide as the 5‐atom linker maintained the potent antitumor potency. Among these compounds, compound 25s (c‐Met IC50 = 4.06 nmol/L) was identified as the most promising lead compound and displayed the most potent antiproliferative activities against A549, HT‐29 and MDA‐MB‐231 cell lines with IC50 of 0.39, 0.20, and 0.58 μmol/L, which were 1.3‐, 1.4‐ and 1.2‐fold superior to foretinib, respectively. The further studies indicated that compound 25s can induce apoptosis of A549 cells and arrest efficiently the cell cycle distribution in G2/M phase of A549 cells. Moreover, compound 25s can also inhibit c‐Met phosphorylation in A549 cells by a dose‐dependent manner. Collectively, these results indicated that compound 25s could be a potential anticancer lead compound deserving for further development.
Natural and Synthetic Fiber‐Based Adsorbents for Water Remediation
Authors: Candido Iuri Custodio Montes , Pires Indira Carolina Brito , de Oliveira Helinando Pequeno 
Published: April 2021

AbstractThe use of unmodified and chemically treated natural fibers for water remediation (removal of chemical residues/oil spills and organic wastewater from water) is a significant and low‐cost strategy to reduce the contamination of aquifers with metal ions, as well as marine environments with oil spills and water bodies with organic dyes. Furthermore, synthetic fibers exhibit a superior performance owing to their tunable surface area and superhydrophobic/swelling properties. This review summarizes the most recent advances in natural fiber‐based biosorbents and synthetic fiber mats since the efficient removal of toxic compounds depend on adequate incorporation of functional groups on the fiber surface for mutual electrostatic and diffusion of contaminants into the fibrils. The most relevant results in the removal of oil, trace metal ions, and organic dyes are presented and evaluated. The evaluation is done according to the strategies for chemical modification of raw materials by the reuse of plastics or conventional electrospinning techniques to support the hierarchical growth of more complex chemical structures.
Influence of Metalaxyl and CGA 62828 Adsorption on the Leaching Behavior of Metal‐Contaminated Soils
Authors: Bassil Joseph , Azzi Valérie , Naveau Aude , Menhem Tony , Rizk Ibtihaj , El Samrani Antoine G. 
Published: April 2021

AbstractPesticides’ degradation in the environment affects their persistence and their environmental impact. In this study, batch experiments are performed to investigate 1) the adsorption of a fungicide, metalaxyl, and its main acid metabolite (CGA 62828) onto the surface of two different soils collected in the metal‐contaminated bay of an industrial area and 2) the influence of these two molecules on the leaching of soluble bases, iron and zinc, from the studied soils. In ultrapure water, adsorption isotherms show that the amount of CGA 62828 adsorbed by the soil particles are higher than the amount of metalaxyl. Furthermore, higher amount of these two molecules are adsorbed at a slower rate by the well‐drained soil in comparison with the more polluted saline anthroposol. In contrary to metalaxyl, CGA 62828 favors the release of the bases K, Na, and Ca by the saline soil in contact with ultrapure water. CGA 62828 also tends to limit the Fe and Zn release which are favored in the presence of metalaxyl. The composition of the local tap water did not significantly influence the adsorbed quantities of metalaxyl and CGA 62828 despite its impact on the Fe and Zn leaching.
Science's Response to CoVID‐19
Authors: Long Marcus J. C. , Aye Yimon 
Published: April 2021

AbstractCoVID‐19 is a multi‐symptomatic disease which has made a global impact due to its ability to spread rapidly, and its relatively high mortality rate. Beyond the heroic efforts to develop vaccines, which we do not discuss herein, the response of scientists and clinicians to this complex problem has reflected the need to detect CoVID‐19 rapidly, to diagnose patients likely to show adverse symptoms, and to treat severe and critical CoVID‐19. Here we aim to encapsulate these varied and sometimes conflicting approaches and the resulting data in terms of chemistry and biology. In the process we highlight emerging concepts, and potential future applications that may arise out of this immense effort.
A NIR fluorescent smart probe for imaging tumor hypoxia
Authors: Hettie Kenneth S. , Klockow Jessica L. , Moon Eui Jung , Giaccia Amato J. , Chin Frederick T. 
Published: April 2021

AbstractBackgroundTumor hypoxia is a characteristic of paramount importance due to low oxygenation levels in tissue negatively correlating with resistance to traditional therapies. The ability to noninvasively identify such could provide for personalized treatment(s) and enhance survival rates. Accordingly, we recently developed an NIR fluorescent hypoxia‐sensitive smart probe (NO2‐Rosol) for identifying hypoxia via selectively imaging nitroreductase (NTR) activity, which could correlate to oxygen deprivation levels in cells, thereby serving as a proxy. We demonstrated proof of concept by subjecting a glioblastoma (GBM) cell line to extreme stress by evaluating such under radiobiological hypoxic (pO2 ≤ ~0.5%) conditions, which is a far cry from representative levels for hypoxia for brain glioma (pO2 = ~1.7%) which fluctuate little from physiological hypoxic (pO2 = 1.0‐3.0%) conditions.AimWe aimed to evaluate the robustness, suitability, and feasibility of NO2‐Rosol for imaging hypoxia in vitro and in vivo via assessing NTR activity in diverse GBM models under relevant oxygenation levels (pO2 = 2.0%) within physiological hypoxic conditions that mimic oxygenation levels in GBM tumor tissue in the brain.MethodsWe evaluated multiple GBM cell lines to determine their relative sensitivity to oxygenation levels via measuring carbonic anhydrase IX (CAIX) levels, which is a surrogate marker for indirectly identifying hypoxia by reporting on oxygen deprivation levels and upregulated NTR activity. We evaluated for hypoxia via measuring NTR activity when employing NO2‐Rosol in in vitro and tumor hypoxia imaging studies in vivo.ResultsThe GBM39 cell line demonstrated the highest CAIX expression under hypoxic conditions representing that of GBM in the brain. NO2‐Rosol displayed an 8‐fold fluorescence enhancement when evaluated in GBM39 cells (pO2 = 2.0%), thereby establishing its robustness and suitability for imaging hypoxia under relevant physiological conditions. We demonstrated the feasibility of NO2‐Rosol to afford tumor hypoxia imaging in vivo via it demonstrating a tumor‐to‐background of 5 upon (i) diffusion throughout, (ii) bioreductive activation by NTR activity in, and (iii) retention within, GBM39 tumor tissue.ConclusionWe established the robustness, suitability, and feasibility of NO2‐Rosol for imaging hypoxia under relevant oxygenation levels in vitro and in vivo via assessing NTR activity in GBM39 models.
Security mechanism for maritime territory and frontier surveillance in naval operations using wireless sensor networks
Authors: Jain Usha , Hussain Muzzammil 
Published: April 2021

SummaryIn an underwater environment, wireless sensor networks (WSNs) have more potential applications such as homeland safety, naval surveillance, and pollution & exploration monitoring. Underwater wireless sensor networks (UWSNs) help in decreasing the rate of causalities and provide efficient ways for monitoring the underwater activities of the other countries. UWSNs can be efficiently used by the navy to monitor suspicious activities and also to counter‐attack any terrorist or enemy attacks. As usual, deploying wireless sensor networks underwater is not only challenging due to environment and constrained resources but also is vulnerable to security attacks. Thus, security is an unexplored and crucial aspect of UWSNs. Here, we define a node authentication mechanism for UWSNs for securing frontier lines, maritime territory, and naval surveillance. The proposed authentication protocol is based on symmetric‐key cryptography and secures against impersonation, masquerade, Sybil, and many more other attacks. We have analyzed the proposed protocol both formally and automatedly and were unable to find any possible security attack on the proposed protocol. The experimental analysis of the mechanism proved that the proposed mechanism consumes less energy compared to the existing mechanisms. Hence, the proposed mechanism can be easily adopted for maintaining the security of maritime territory and reduce the causalities in naval operations.
Accelerating real‐time object detection in high‐resolution video surveillance
Authors: Wang Yuefeng , Mao Kuang , Chen Tong , Yin Yanglong , He Shuibing , Chen Gang 
Published: April 2021

SummaryAs various algorithms and models spring up, object detection‐based deep learning for image analysis has become an established technology in the field of computer vision. Furthermore, object detection for high‐resolution videos derived from ubiquitous surveillance cameras draws many researchers' attention due to its practical significance and the challenge on detecting accuracy and speed. Existing object detection methods mainly resize and compress each frame in the video and then apply the detection algorithm, but with the method, the detection for small objects in dense scenes is far from satisfactory in terms of accuracy because small objects are reduced to pixel‐level sizes in compressed frame images. In order to fix this issue, we propose AROD, a parallel detection framework based on adaptive image cropping. Unlike the traditional first‐compression‐and‐then‐detection methods, AROD adopts adaptive image cropping for distributed parallel detection. In this way, AROD significantly improves the accuracy of small object detection in dense scenes with acceptable overhead. In our experimental evaluation, YOLOv2‐tiny model equipped with AROD reaches 29.29 FPS along with high detection accuracy. Experimental results verify that AROD ensures the high throughput of real‐time video analytics while maintaining high detection accuracy.
Bi4O5BrI Solid Solution towards Boosted Photocatalytic Reduction and Oxidation Activities Induced by Efficient Carrier Separation
Authors: Zhang Jia , Wang Zhen , Liu Lu , Hu Baorong , Zhao Yilei , Zhao Shuang , Zhao Wenting , Li Shuang , Chen Xi , Hai Xin 
Published: April 2021

AbstractSemiconductor photocatalysis is considered a promising technology for destroying pollutants, while the faint carrier separation efficiency of the photocatalyst is one of the main limitations for obtaining high performance. This study reports a solid solution strategy to achieve effective carrier separation in Bi4O5BrxI2−x. The solid solution structure endows Bi4O5BrxI2−x with proper light adsorption, tunable band gap, and effective separation of photogenerated electrons and holes. As a result, Bi4O5BrxI2−x exhibits reduction and oxidation activities for highly efficient photocatalytic Cr(VI) reduction and tetracycline hydrochloride (HTC) degradation under visible light irradiation, with the activity reaching the maximum at x = 1. Within 30 min, the removal rates of Cr(VI) and HTC reach 90% and 100%, respectively. This study not only provides an effective strategy to increase the carrier separation of bismuth‐based semiconductors, but also opens new opportunities to rationally design other solid solution catalysts with high performance in wastewater treatment.
Advances in Versatile Nanoscale Catalyst for the Reductive Catalytic Fractionation of Lignin
Authors: Zhang Haichuan , Fu Shiyu , Du Xu , Deng Yulin 
Published: April 2021

AbstractIn the past five years, biomass‐derived biofuels and biochemicals were widely studied both in academia and industry as promising alternatives to petroleum. In this Review, the latest progress of the synthesis and fabrication of porous nanocatalysts that are used in catalytic transformations involving hydrogenolysis of lignin is reviewed in terms of their textural properties, catalytic activities, and stabilities. A particular emphasis is made with regard to the catalyst design for the hydrogenolysis of lignin and/or lignin model compounds. Furthermore, the effects of different supports on the lignin hydrogenolysis/hydrogenation are discussed in detail. Finally, the challenges and future opportunities of lignin hydrogenolysis over nanomaterial‐supported catalysts are also presented.
CD56, HLA‐DR, and CD45 recognize a subtype of childhood AML harboring CBFA2T3‐GLIS2 fusion transcript
Authors: Zangrando Andrea , Cavagnero Francesca , Scarparo Pamela , Varotto Elena , Francescato Samuela , Tregnago Claudia , Cuccurullo Rosanna , Fagioli Franca , Nigro Luca Lo , Masetti Riccardo , Putti Maria Caterina , Rizzari Carmelo , Santoro Nicola , Pession Andrea , Pigazzi Martina , Locatelli Franco , Basso Giuseppe , Buldini Barbara 
Published: April 2021

AbstractThe presence of CBFA2T3‐GLIS2 fusion gene has been identified in childhood Acute Myeloid Leukemia (AML). In view of the genomic studies indicating a distinct gene expression profile, we evaluated the role of immunophenotyping in characterizing a rare subtype of AML‐CBFA2T3‐GLIS2 rearranged. Immunophenotypic data were obtained by studying a cohort of 20 pediatric CBFA2T3‐GLIS2‐AML and 77 AML patients not carrying the fusion transcript. Enrolled cases were included in the Associazione Italiana di Ematologia Oncologia Pediatrica (AIEOP) AML trials and immunophenotypes were compared using different statistical approaches. By multiple computational procedures, we identified two main core antigens responsible for the identification of the CBFA2T3‐GLIS2‐AML. CD56 showed the highest performance in single marker evaluation (AUC = 0.89) and granted the most accurate prediction when used in combination with HLA‐DR (AUC = 0.97) displaying a 93% sensitivity and 99% specificity. We also observed a weak‐to‐negative CD45 expression, being exceptional in AML. We here provide evidence that the combination of HLA‐DR negativity and intense bright CD56 expression detects a rare and aggressive pediatric AML genetic lesion improving the diagnosis performance.
Ultrasound‐guided core biopsy with on‐site cytology‐immediate diagnosis in pediatric oncology
Authors: Sokolovski Boris , Scolnik Michal , Malkin Leonid , Postovsky Sergey , Weyl Ben‐Arush Myriam , Ilivitzki Anat 
Published: April 2021

AbstractBackgroundAccurate and swift tissue diagnosis is extremely important for the timely initiation of treatment in pediatric oncology. In our department, ultrasound‐guided core needle biopsy (US‐guided CNB) is used for tissue diagnosis. In 2016, we added on‐site cytology, allowing for an immediate primary diagnosis. We retrospectively reviewed our performance in terms of safety and accuracy for CNBs and on‐site cytology.MethodsAll pediatric biopsies performed in our hospital between February 2016 and December 2020, were included. Patient clinical, procedural and follow‐up data were collected. CNB pathology and cytology results were compared to the final pathologic diagnosis.ResultsWe included 71 patients for which 72 biopsies with on‐site touch imprint (TI) cytology were performed; the average latency time to biopsy was 1 day. Altogether, we had 61 tumors, (58 malignant, 3 benign) and 11 other lesions. On‐site cytology diagnosed 58 malignant tumors, 3 benign tumors and 11 non‐tumor tissues. The cytologist correctly differentiated tumor from inflammation in all cases, and diagnosed the precise tumor type in 57 cases, with an accuracy of 94% for final diagnosis. We had no complications related to the procedure or sedation.ConclusionUS‐guided CNB with on‐site TI cytology for suspected malignancy in the pediatric population is highly available, safe, and accurate, with real‐time diagnosis in most cases. This accelerated diagnostic route has a huge impact on patient care.