bluuebunny/crossref_metadata_2025_split huggingface dataset:
Photo‐Responsive Hydrogen‐Bonded Molecular Networks Capable of Retaining Crystalline Periodicity after Isomerization
Authors: Kasuya Koki , Oketani Ryusei , Matsuda Souta , Sato Hiroyasu , Ishiwari Fumitaka , Saeki Akinori , Hisaki Ichiro 
Published: April 2024

AbstractThe molecular conformation, crystalline morphology, and properties of photochromic organic crystals can be controlled through photoirradiation, making them promising candidates for functional organic materials. However, photochromic porous molecular crystals with a networked framework structure are rare due to the difficulty in maintaining space that allows for photo‐induced molecular motion in the crystalline state. This study describes a photo‐responsive single crystal based on hydrogen‐bonded (H‐bonded) network of dihydrodimethylbenzo[e]pyrene derivative 4BDHP. A crystal composed of H‐bonded undulate layers, 4BDHP‐2, underwent photo‐isomerization in the crystalline state due to loose stacking of the layers. Particularly, enantio‐pure crystal (S,S)‐4BDHP‐2 allowed to reveal the structure of the photoisomerized crystal, in which the closed form (4BDHP) and open form (4CPD) were arranged alternately with keeping crystalline periodicity, although side reactions were also implied. The present proof‐of‐concept system of a photochromic framework that retains crystalline periodicity after photo‐isomerization may provide new light‐driven porous functional materials.
Transition Metal‐Free Catalytic C−H Zincation and Alumination
Authors: Kumar Bisai Milan , Łosiewicz Justyna , Sotorrios Lia , Nichol Gary S. , Dominey Andrew P. , Cowley Michael J. , Thomas Stephen P. , Macgregor Stuart A. , Ingleson Michael J. 
Published: April 2024

AbstractC−H metalation is the most efficient method to prepare aryl–zinc and –aluminium complexes that are ubiquitous nucleophiles. Virtually all C−H metalation routes to form Al/Zn organometallics require stoichiometric, strong Brønsted bases with no base‐catalyzed reactions reported. Herein we present a catalytic in amine/ammonium salt (Et3N/[(Et3N)H]+) C−H metalation process to form aryl‐zinc and aryl‐aluminium complexes. Key to this approach is coupling an endergonic C−H metalation step with a sufficiently exergonic dehydrocoupling step between the ammonium salt by‐product of C−H metalation ([(Et3N)H]+) and a Zn−H or Al−Me containing complex. This step, forming H2/MeH, makes the overall cycle exergonic while generating more of the reactive metal electrophile. Mechanistic studies supported by DFT calculations revealed metal‐specific dehydrocoupling pathways, with the divergent reactivity due to the different metal valency (which impacts the accessibility of amine‐free cationic metal complexes) and steric environment. Notably, dehydrocoupling in the zinc system proceeds through a ligand‐mediated pathway involving protonation of the β‐diketiminate Cγ position. Given this process is applicable to two disparate metals (Zn and Al), other main group metals and ligand sets are expected to be amenable to this transition metal‐free, catalytic C−H metalation.
Spontaneous α‐C−H Carboxylation of Ketones by Gaseous CO2 at the Air‐water Interface of Aqueous Microdroplets
Authors: Basuri Pallab , Mukhopadhyay Sinchan , Reddy K. S. S. V. Prasad , Unni Keerthana , Spoorthi B. K. , Shantha Kumar Jenifer , Yamijala Sharma S. R. K. C. , Pradeep Thalappil 
Published: April 2024

AbstractWe present a catalyst‐free route for the reduction of carbon dioxide integrated with the formation of a carbon‐carbon bond at the air/water interface of negatively charged aqueous microdroplets, at ambient temperature. The reactions proceed through carbanion generation at the α‐carbon of a ketone followed by nucleophilic addition to CO2. Online mass spectrometry reveals that the product is an β‐ketoacid. Several factors, such as the concentration of the reagents, pressure of CO2 gas, and distance traveled by the droplets, control the kinetics of the reaction. Theoretical calculations suggest that water in the microdroplets facilitates this unusual chemistry. Furthermore, such a microdroplet strategy has been extended to seven different ketones. This work demonstrates a green pathway for the reduction of CO2 to useful carboxylated organic products.
Erinnerungskulturen in den Wissenschaften – eine Frage hegemonialer Narrative?
Authors: Söhner Felicitas 
Published: April 2024

AbstractIndividual and institutional memories tend to form hegemonic narratives that serve to create identity and meaning. If history is written by experts and not by professional historians, historical retrospectives and narratives are usually written by leading figures in a particular field. They try to use their idea of exclusive knowledge about certain events, backgrounds and motivations to shape these narratives. In order to question such narratives, a critical analysis of scientific memory and its cultural significance is required. This article reflects on the methodological challenges of oral history projects in medicine, using a project on psychiatric reform in the Federal Republic of Germany as an example. In particular, the interviewees’ claim to interpretatively dominate the marginalised co‐actors is examined.
Transformation von Gedächtnis zwischen wissenschaftlicher Rezeption und Popularisierung: Die posthume Verleihung des Friedenspreises des Deutschen Buchhandels an Janusz Korczak
Authors: Oommen‐Halbach Anne , Halling Thorsten 
Published: April 2024

AbstractThis article focuses on analysis of the international controversy provoked by the posthumous awarding of the 1972 Peace Prize of the German Book Trade to the Jewish‐Polish physician, pedagogue and writer Janusz Korczak (1878/79–1942). The controversy, which centred around the recipient of the prize money, can be identified as an important catalyst both for the popularisation of the Korczak movement and for the institutionalisation of Korczak research in Germany, particularly in the field of pedagogical research. The article investigates the various interests and goals of memory policy actors in academia, business, politics and the media, and emphasizes the very strong link between Korczak's oeuvre and Holocaust remembrance, in the light of correspondences, manuscripts and press reports about this award ceremony. The mechanisms of the reciprocal transfer of attention between scholars and the public are examined from the perspective of memory studies and the history of science, particularly with regard to their specific influence on the establishment of German‐language Korczak research.
Highly luminescent and stable CsPbBr3 perovskite nanocrystals coated with polyethersulfone for white light‐emitting diode applications
Authors: Zhang Hao , Wang Xuemei , Ai Ning , Wang Jianli 
Published: April 2024

AbstractSimultaneously improving the stability and photoluminescence quantum yield (PLQY) of all inorganic perovskite nanocrystals (NCs) is crucial for their practical utilization in various optoelectronic devices. Here, CsPbBr3 NCs coated with polyethersulfone (PES) were prepared via an in‐situ co‐precipitation method. The sulfone groups in PES bind to undercoordinated lead ion (Pb2+) on the CsPbBr3 NCs, resulting in significant reduction of surface defects, thus enhancing the PLQY from 74.2% to 88.3%. Meanwhile, the PES‐coated NCs exhibit high water resistance and excellent heat and light stability, maintaining over 85% of the initial PL intensity under thermal aging (70°C, 4 h) and continuous 365 nm ultraviolet (UV) light irradiation (24 W, 8 h) conditions. By contrast, the PL intensity of the control NCs dramatically dropped to less than 40%. Finally, a diode emitting bright white light was fabricated utilizing the PES‐coated CsPbBr3 NCs, which exhibits a color gamut of ~110% NTSC standard.
Experience with the ACURATE neo and neo2 transcatheter aortic valves in Spain. The PRECISA (PRospective Evaluation Complementing Investigation with ACURATE devices) registry
Authors: Tébar Daniel , Carrillo Xavier , García del Blanco Bruno , Gómez‐Hospital Joan Antoni , Nombela Luis , Molina Eduardo , Galeote Guillermo , Vilalta Victoria , Serra‐García Vicenc , Carol Guillem Muntané , Jiménez‐Valero Santiago , Fernandez‐Nofrerias Eduard , Calabuig‐Goena Álvaro , Jurado‐Román Alfonso , Sánchez‐Recalde Ángel , Fernández‐Velasco María , Bosca Lisardo , Moreno Raúl 
Published: April 2024

AbstractBackgroundPrevious studies have documented a high rate of implantation success with the ACURATE neo2 valve, as well as a reduction in paravalvular leak (PVL) compared to its predecessor, the ACURATE neo. However, there are no studies that have reviewed and compared the long‐term clinical and hemodynamic outcomes of these patients.AimsThis study aimed to evaluate the results of the ACURATE neo transcatheter aortic valve in a real‐world context, and to compare the results of the outcomes of both generations of this device (ACURATE neo and ACURATE neo2), with a specific focus on procedural success, safety, and long‐term effectiveness.MethodsA prospective study including all consecutive patients treated with the ACURATE neo device in seven hospitals was conducted (Clinical Trials Identification Number: NCT03846557). The primary endpoint consisted of a composite of adverse events, including mortality, aortic insufficiency, and other procedural complications. As the second‐generation device (ACURATE neo2) replaced the ACURATE neo during the study period, hemodynamic and clinical results before admission, at 30 days, and at 1 year of follow‐up were compared between the two generations.ResultsA total of 296 patients underwent transcatheter aortic valve implantation with the ACURATE device, with 178 patients receiving the ACURATE neo and 118 patients receiving the ACURATE neo2. In the overall population, the absence of device success occurred in 14.5%. The primary reason for the absence of device success was the presence of para‐valvular regurgitation ≥ 2. There were no instances of coronary occlusions, valve embolization, annulus rupture, or procedural deaths. ACURATE neo2 was associated with a significantly higher device success rate (91.7% vs. 82%, p = 0.04), primarily due to a significantly lower rate of para‐valvular regurgitation, which remained significant at 1 year.ConclusionThe use of ACURATE neo and neo2 transcatheter aortic valves is associated with satisfactory clinical results and an extremely low rate of complications. The ACURATE neo2 enables a significantly higher device success rate, primarily attributed to a significant reduction in the rate of PVL.
Three‐year clinical outcomes after transcatheter aortic valve implantation in patients with bicuspid aortic disease: Comparison between self‐expanding and balloon‐expandable valves
Authors: Boiago Mauro , Bellamoli Michele , De Biase Chiara , Beneduce Alessandro , Alonso Lola Gutierrez , Laforgia Pietro , Feliachi Souehib , Oliva Omar Alessandro , Dumonteil Nicolas , Tchétché Didier 
Published: April 2024

AbstractIntroductionBicuspid aortic valve (BAV) stenosis is a complex anatomical scenario for transcatheter aortic valve implantation (TAVI). Favorable short‐term clinical outcomes have been reported with TAVI in this setting, but long‐term data are scarce.MethodsWe retrospectively included, in a single‐center registry, patients with BAV stenosis who underwent TAVI before 2020. We compared patients treated with self‐expanding valves (SEV) versus balloon‐expandable valves (BEV). The primary endpoint was a composite of all‐cause mortality, stroke and need for aortic valve (AV) reintervention at 3 years. Secondary endpoints included each component of the primary endpoint, cardiovascular mortality, permanent pacemaker implantation (PPI) rate, mean gradient and ≥moderate paravalvular leak (PVL) rate.ResultsA total of 150 consecutive patients (SEV = 83, BEV = 67) were included. No significant differences were reported between SEV and BEV groups for the primary composite endpoint (SEV 35.9% vs. BEV 32%, p = 0.66), neither for clinical secondary endpoints (all‐cause mortality SEV 28.1% vs. BEV 28%, p = 0.988; cardiovascular mortality SEV 14.1% vs. BEV 20%, p = 0.399; stroke SEV 12.5% vs. BEV 6%, p = 0.342; need for AV reintervention SEV 0% vs. BEV 0%; PPI SEV 28.1% vs. BEV 24%, p = 0.620). A lower mean gradient persisted up to 3 years in the SEV group (SEV 8.8 ± 3.8 mmHg vs. BEV 10.7 ± 3.2 mmHg, p = 0.063), while no significant difference was found in the rate of ≥ moderate PVL (SEV 3/30 vs. BEV 0/25, p = 0.242).ConclusionsIn this single center registry, we observed favorable 3‐year clinical outcomes in nonselected BAV patients treated with different generation devices, without significant differences between patients receiving SEV or BEV.
Control of Kinetic Pathways toward Supramolecular Chiral Polymorphs for Tunable Circularly Polarized Luminescence
Authors: Pan Hongfei , Hou Baokai , Jiang Yuanyuan , Liu Mengqi , Ren Xiang‐Kui , Chen Zhijian 
Published: April 2024

AbstractAn amphiphilic aza‐BODIPY dye (S)‐1 bearing two chiral hydrophilic side chains with S‐stereogenic centers was synthesized. This dye exhibited kinetic‐controlled self‐assembly pathways and supramolecular chiral polymorphism properties in MeOH/H2O (9/1, v/v) mixed solvent. The (S)‐1 monomers first aggregated into a kinetic controlled, off‐pathway species Agg. A, which was spontaneously transformed into an on‐pathway metastable aggregate (Agg. B) and subsequently into the thermodynamic Agg. C. The three aggregate polymorphs of dye (S)‐1 displayed distinct optical properties and nanomorphologies. In particular, chiral J‐aggregation characteristics were observed for both Agg. B and Agg. C, such as Davydov‐split absorption bands (Agg. B), extremely sharp and intense J‐band with large bathochromic shift (Agg. C), non‐diminished fluorescence upon aggregation, as well as strong bisignated Cotton effects. Moreover, the AFM and TEM studies revealed that Agg. A had the morphology of nanoparticle while fibril or rod‐like helical nanostructures with left‐handedness were observed respectively for Agg. B and Agg. C. By controlling the kinetic transformation process from Agg. B to Agg. C, thin films consisting of Agg. B and Agg. C with different ratios were prepared, which displayed tunable CPL with emission maxima at 788–805 nm and g‐factors between −4.2×10−2 and −5.1×10−2.
Multiple pathological fractures and muscle atrophy caused by a parathyroid carcinoma with postoperative hungry bone syndrome: A case report
Authors: Liu Qinguo , Zhang Ying , Ma Deshou , Gengzhi Huazhen , Maimaiti Yusufu , Chen Qishuai , Ma Zhijun 
Published: April 2024

AbstractBackgroundParathyroid carcinoma (PC) is a rare endocrine malignancy causing pathological changes such as abnormal bone metabolism, elevated serum calcium, and impaired renal function, and uncontrollable hypercalcemia is the main cause of death in PC patients. The diagnosis of PC is challenging and relying on postoperative histopathology. Radical surgery at the first time is the only effective therapy to cure PC. Hungry bone syndrome (HBS) is a relatively uncommon complication of parathyroidectomy characterized by profound and prolonged hypocalcemia, timely electrolyte monitoring and alternative interventional protocols can prevent symptomatic hypocalcemia.CaseA 57‐year‐old man presented with multiple pathological fractures and muscle atrophy as the main symptoms accompanied by bone pain, hypercalcemia, elevated parathyroid hormone (PTH), and an enlarged left‐sided neck mass. After consultation of multidisciplinary team, he was treated conservatively with plaster bandage fixation and infusion of intravenous zoledronic acid; and then complete resection of parathyroid mass + removal of involved tissue structures + left thyroid and isthmus lobectomy + lymph node dissection in the VI region in left neck were performed. The postoperative histopathology suggested a diagnosis of parathyroid carcinoma. Calcium and fluid supplementation and oral levothyroxine tablets were given postoperatively. Unexpectedly, the patient's PTH level decreased rapidly at 24 h postoperative, and serum calcium and phosphorus decreased continuously, and he felt numb around perioral sites and fingertips, which considered to be postoperative HBS complicated by parathyroidectomy. Then, a large amount of calcium supplementation and vitamin D were given timely and the patient got better at 1 month postoperatively. At 9‐month postoperative, his bone pain and fatigue were significantly relieved compared with before with calcium, phosphorus, and PTH levels at normal range.ConclusionThe possibility of parathyroid disease, particularly PC, should be considered in the presence of multiple pathological fractures, muscle atrophy, generalized bone pain, hypercalcemia, and clear neck mass. Radical resection of the tumor lesions at the first surgery is a key element affecting the prognosis of PC, and the effective management of preoperative hypercalcemia and postoperative HBS is also of great significance for improving prognosis.
Tailored Polymeric Carbon Nitride Coupled with Bi2O3 for Constructing Z‐Scheme Heterojunction with Enhanced Photocatalytic Activity
Authors: Gong Rongcai , Yang Xinxin , Liu Guiqing , Dong Zhaocen , Guan Meili , Gong Xuezhong , Tang Jianguo 
Published: April 2024

AbstractThe great demand for visible‐light‐induced catalysts with high photocatalytic performance has stimulated extensive interest in constructing g‐C3N4‐based Z‐Scheme heterojunctions. In this research work, the g‐C3N4/Bi2O3 Z‐Scheme heterojunction by precipitation‐hydrothermal method was constructed, and characterized by various techniques. The g‐C3N4/Bi2O3‐1 composite exhibited a transient photocurrent response approximately 7 and 5 times higher than that of bare g‐C3N4 and Bi2O3, respectively, and showed higher visible photocatalytic activity with 99.8 % degradation of methylene blue (MB) within 75 min. Meanwhile, the pH effect on the photocatalytic degradation of MB was investigated. Radicals trapping experiments showed that •OH free radical played a predominant role for the degradation of MB, EPR analysis confirmed the presence of superoxide radicals, which combined with the band structure of the composites, confirmed the Z‐Scheme of the heterojunction. A possible mechanism for photocatalytic degradation of MB dyes in g‐C3N4/Bi2O3‐1 composites was also proposed. This study provided a new avenue for the development of novel g‐C3N4‐based Z‐Scheme heterojunction materials with prospective applications in the fields of energy and environment.
Sustainable Gas Storage: CO2 Activation of Edge‐Functionalized Graphitic Nanoplatelets
Authors: Kim Seok‐Jin , Hui Kim Min , Jung Lee Se , Yavuz Cafer T. , Jeon In‐Yup 
Published: April 2024

AbstractGraphitic nanoplatelets (GnPs), edge‐selectively carboxylated graphitic nanoplatelets (ECGnPs), are functionalized with a carboxylic acid at the edge increasing their surface area, and are highly dispersible in various solvents. However, there is a limit in that the basal plane remains intact because it is functionalized only in the part where the radical is generated at the edge. Here, we activate ECGnPs to have porous structures by flowing CO2 at 900 °C. Etching of the ECGnPs structure was performed through the Boudouard reaction, and the surface area increased from 579 m2 g−1 to a maximum of 2462 m2 g−1. In addition, the pore structure was investigated with various adsorption gases (CH4, Ar, CO2, H2, and N2) according to the reaction time. This study provides the overall green chemistry in that it utilizes CO2 from manufacturing to activation compared to the process of activating with conventional chemical treatment.
Early reduction in anxiety sensitivity predicts greater reduction in disordered eating and trait anxiety during treatment for bulimia nervosa
Authors: Velkoff Elizabeth A. , Rubino Laura G. , Liu Jianyi , Manasse Stephanie M. , Juarascio Adrienne S. 
Published: April 2024

AbstractObjectiveAnxiety sensitivity (AS), the trait‐like fear of symptoms of anxiety, has been associated with eating disorder (ED) pathology broadly, bulimia nervosa (BN) symptoms specifically, and the anxiety disorders that are commonly comorbid with BN. AS, especially for physical symptoms specifically, maybe a risk and maintenance factor for BN and comorbid anxiety.MethodAdult participants with BN (n = 44) in a clinical trial comparing CBT to mindfulness and acceptance‐based treatment (MABT) reported ED symptoms, trait anxiety, and AS through treatment and follow‐up. We predicted that greater early reduction (i.e., within the first month of treatment) in AS would predict greater reductions in ED symptoms and trait anxiety at post‐treatment and follow‐up.ResultsEarly reductions in AS for physical concerns predicted lower ED symptoms and trait anxiety at post‐treatment but not follow‐up. Exploratory analyses indicated that treatment groups did not differ in either early or total change in AS, controlling for baseline AS.DiscussionEarly reductions in AS may be an important treatment target for BN, and may additionally support reductions in anxiety. Future research should identify which components of CBT and MABT best target AS, to deliver these components early in treatment, when they can have maximum effect.Public SignificanceAnxiety sensitivity, the fear of symptoms of anxiety, is associated with eating disorders (ED). In this study, participants in treatment for bulimia nervosa reported ED symptoms, trait anxiety, and anxiety sensitivity through treatment and follow‐up. Greater early reductions in anxiety sensitivity predicted lower ED symptoms and trait anxiety at post‐treatment. Future research should identify which elements of treatment best target anxiety sensitivity, to deliver them early in treatment.
Predicting the fundamental thermal niche of ectotherms
Authors: Simon Margaret W. , Amarasekare Priyanga 
Published: April 2024

AbstractClimate warming is predicted to increase mean temperatures and thermal extremes on a global scale. Because their body temperature depends on the environmental temperature, ectotherms bear the full brunt of climate warming. Predicting the impact of climate warming on ectotherm diversity and distributions requires a framework that can translate temperature effects on ectotherm life‐history traits into population‐ and community‐level outcomes. Here we present a mechanistic theoretical framework that can predict the fundamental thermal niche and climate envelope of ectotherm species based on how temperature affects the underlying life‐history traits. The advantage of this framework is twofold. First, it can translate temperature effects on the phenotypic traits of individual organisms to population‐level patterns observed in nature. Second, it can predict thermal niches and climate envelopes based solely on trait response data and, hence, completely independently of any population‐level information. We find that the temperature at which the intrinsic growth rate is maximized exceeds the temperature at which abundance is maximized under density‐dependent growth. As a result, the temperature at which a species will increase the fastest when rare is lower than the temperature at which it will recover from a perturbation the fastest when abundant. We test model predictions using data from a naturalized–invasive interaction to identify the temperatures at which the invasive can most easily invade the naturalized's habitat and the naturalized is most likely to resist the invasive. The framework is sufficiently mechanistic to yield reliable predictions for individual species and sufficiently broad to apply across a range of ectothermic taxa. This ability to predict the thermal niche before a species encounters a new thermal environment is essential to mitigating some of the major effects of climate change on ectotherm populations around the globe.