bluuebunny/crossref_metadata_2025_split huggingface dataset:
Strategy for Co‐Enhancement of Remanence–Coercivity of RE‐Fe‐B Sintered Magnets with High Ce‐Content: Appropriate La Substitution
Authors: Chen Hao , Li Yuqing , Zhang Hongguo , Liu Weiqiang , Wu Haihui , Qin Yuan , Yue Ming , Wei Qifeng , Zhang Baoguo , Di Jinghui 
Published: April 2023

AbstractThe development of low‐cost RE‐Fe‐B sintered magnets with large La/Ce content is of great significance for the balanced utilization of rare earth (RE) resources, but it is limited by reduced magnetic properties. In this work, the coercivity (Hcj), remanence (Br), maximum energy product [(BH)max], and temperature stability are simultaneously enhanced for magnets with LaCe accounting for 40 wt% of the total RE. The synergistic regulation of the REFe2 phase, Ce‐valence, and grain boundaries (GBs) in RE‐Fe‐B sintered magnets is realized for the first time by introducing appropriate La elements. The La elements inhibit the generation of the REFe2 phase and tend to stay in the triple junctions, promoting the segregation of the RE/Cu/Ga elements and contributing to the formation of Ce/Nd/Cu/Ga‐rich continuous thicker lamellar GBs, and as a result, weakening the detrimental effect on HA caused by La element substitution and enhancing Hcj. In addition, partial La atoms entering the RE2Fe14B phase are beneficial for improving the Br and temperature stability of the magnets and promoting the Ce3+ ion ratio, which also provides additional benefit for Br. The findings provide an effective and feasible way to co‐enhance the remanence and coercivity of RE‐Fe‐B sintered magnets with high Ce content.
Holistic Strategies Lead to Enhanced Efficiency and Stability of Hybrid Chemical Vapor Deposition Based Perovskite Solar Cells and Modules
Authors: Tong Guoqing , Zhang Jiahao , Bu Tongle , Ono Luis K. , Zhang Congyang , Liu Yuqiang , Ding Chenfeng , Wu Tianhao , Mariotti Silvia , Kazaoui Said , Qi Yabing 
Published: April 2023

AbstractHybrid chemical vapor deposition (HCVD) is a promising method for the up‐scalable fabrication of perovskite solar cells/modules (PSCs/PSMs). However, the efficiency of the HCVD‐based perovskite solar cells still lags behind the solution‐processed PSCs/PSMs. In this work, the oxygen loss of the electron transport layer of SnO2 in the HCVD process and its negative impact on solar cell device performance are revealed. As the counter‐measure, potassium sulfamate (H2KNO3S) is introduced as the passivation layer to both mitigate the oxygen loss issue of SnO2 and passivate the uncoordinated Pb2+ in the perovskite film. In parallel, N‐methylpyrrolidone (NMP) is used as the solvent to dissolve PbI2 by forming the intermediate phase of PbI2•NMP, which can greatly lower the energy barrier for perovskite nucleation in the HCVD process. The perovskite seed is employed to further modulate the kinetics of perovskite crystal growth and improve the grain size. The resultant solar cells yield a champion power conversion efficiency (PCE) of 21.98% (0.09 cm2) with a stable output performance of 21.15%, and the PCEs of the mini‐modules are 16.16% (22.4 cm2, stable output performance of 14.72%) and 12.12% (91.8 cm2). Furthermore, the unencapsulated small area device shows an outstanding operational stability with a T80 lifetime exceeding 4000 h.
Negative perceived context of reception and sociocultural resources on mental health among Hispanic and Somali adolescents
Authors: Guan Shu‐Sha Angie , Nunez Velia , Areba Eunice , Forster Myriam 
Published: April 2023

AbstractAlthough immigrant negative perceived context of reception (PCOR), perceptions of the opportunities and degree of acceptance in an immigrant‐receiving community, has been linked with compromised adolescent well‐being, receiving contexts may differ by region and for youth from different ethnic backgrounds. The current study examines how negative PCOR and factors that promote resilience differentially shape mental health among Hispanic and Somali adolescents in Minnesota. Hispanic (n = 163) and Somali (n = 186) first‐ and second‐generation youth aged 12–19 completed a survey on negative PCOR, assets and resources (i.e., ethnic identity, social support, religious participation), and mental well‐being (i.e., anxiety and depressive symptoms). Parents and caregivers also completed a survey on PCOR and social support. Adolescent negative PCOR, relative to parent/caregiver negative PCOR, was associated with higher adolescent anxiety and depressive symptoms. Religious participation and social support, reported by both parent/caregiver and adolescent, was associated with lower anxiety and depressive symptoms. Additionally, among Hispanic adolescents, social support buffered the effects of negative PCOR on depressive symptoms. Conversely, strong ethnic identity was associated with higher depressive symptoms for both groups, suggesting acculturative and assimilative pressures play an important role in adolescent mental health. Although social ties can be weakened postmigration, our results indicate that social and religious resources remain beneficial. Given that by the end of the next decade over 50% of the US youth population will identify as part of a racial or ethnic minority group, positive postimmigration adaptation is a critical public health concern.
The spiral of disadvantage: Ethnolinguistic discrimination, acculturative stress and health in Nahua indigenous communities in Mexico
Authors: Olko Justyna , Galbarczyk Andrzej , Maryniak Joanna , Krzych‐Miłkowska Karolina , Tepec Humberto Iglesias , de la Cruz Eduardo , Dexter‐Sobkowiak Elwira , Jasienska Grazyna 
Published: April 2023

AbstractObjectivesThe aim of this study was to test the hypothesis that ethnic and ethnolinguistic discrimination, and Post‐Traumatic Stress Disorder (PTSD) related to being Indigenous as well as different aspects of acculturative stress, are associated with poorer health and higher levels of depression among the Nahua Indigenous communities.Materials and methodsOur quantitative survey was carried out in four different regions inhabited by the Nahua people in Mexico. Self‐rated health and depression, the symptoms of PTSD, two facets of acculturative stress and ethnolinguistic discrimination were assessed by questionnaires. The data were analyzed using binary logistic regression models.ResultsThe symptoms of PTSD and acculturative stress experienced in the workplace were significantly associated with a higher risk of poor self‐rated health, adjusted for various socio‐demographic characteristics. Acculturative stress, discouragement of language use, language avoidance and ethnolinguistic discrimination were related to a higher risk of depression and PTSD.DiscussionOur research implies that ethnic and linguistic discrimination, acculturative stress and the memory of harm linked to being Indigenous reflected in the symptoms of PTSD, are important predictors of poorer health and depression among Nahua groups in Mexico. These adverse effects could be significantly counteracted by effective dealing with stigmatization and discrimination against Indigenous people in Mexico and by replacing strong assimilation pressures with integrational approaches that respect ethnolinguistic diversity and reduce socioeconomic marginalization.
Access to Polysulfides through Photocatalyzed Dithiosulfonylation
Authors: Ren Xiaorui , Ke Qiumin , Zhou Yuanyuan , Jiao Jingchao , Li Guoxin , Cao Si , Wang Xuyong , Gao Qianwen , Wang Xi 
Published: April 2023

AbstractIn this study, we outline a general method for photocatalyzed difunctionalization of alkenes, a diene, alkynes, 1,3‐enynes, and [1.1.1]propellane using dithiosulfonate reagents (ArSO2‐SSR) with improved atom economy. Both “ArSO2‐” and “‐SSR” on the dithiosulfonate are transferred under mild conditions with broad substrate scope, high stereoselectivity, and complete regioselectivity. Significantly, the resulting dithiosulfonylated styrene is a general and practical nucleophilic disulfuration reagent, reacting with a variety of electrophiles efficiently. Both reactions can be conducted on gram scale, rendering the approach highly valuable.
Überwinden von Diffusionslimitierungen Faradayscher Reaktionen: Eigenschafts‐Wirkungsbeziehungen der 2D‐leitfähigen metallorganischen Gerüstverbindung Cu3(HHTP)2 für die reversible Lithium‐Ionen Speicherung
Authors: Wrogemann Jens Matthies , Lüther Marco Joes , Bärmann Peer , Lounasvuori Mailis , Javed Ali , Tiemann Michael , Golnak Ronny , Xiao Jie , Petit Tristan , Placke Tobias , Winter Martin 
Published: April 2023

AbstractFaradaysche Prozesse, die mit einem Ladungsübergang einhergehen, unterliegen häufig einer Diffusionslimitierung im Festkörper. Leitfähige zweidimensionale metallorganische Gerüstverbindungen (2D MOFs) mit schnellem Ionentransport können jedoch beides kombinieren – Ladungstransfer und schnelle Diffusion innerhalb ihrer porösen Struktur. Um die verbleibenden Diffusionsbeschränkungen, die durch die Partikelmorphologie verursacht werden, zu untersuchen, werden verschiedene Synthesewege von Cu‐2,3,6,7,10,11‐Hexahydroxytriphenylen (Cu3(HHTP)2), einem kupferbasierten 2D‐MOF, verwendet, um flocken‐ und stäbchenförmige MOF‐Partikel herzustellen. Beide Morphologien werden systematisch charakterisiert und für die redoxaktive Speicherung von Li+‐Ionen evaluiert. Der Redoxmechanismus wird mit Hilfe von Röntgenabsorptionsspektroskopie, FTIR‐Spektroskopie und in situ XRD untersucht. Zudem werden beide Strukturen hinsichtlich ihrer kinetischen Eigenschaften für die Speicherung von Li+‐Ionen mittels Zyklovoltammetrie und Impedanzspektroskopie verglichen, wobei ein signifikanter Einfluss der Partikelmorphologie für 2D‐MOFs auf kinetische Aspekte der elektrochemischen Li+‐Ionenspeicherung festgestellt wird. Diese Studie zeigt Lösungsansätze für die Optimierung redoxaktiver, poröser Strukturen auf, um Diffusionsbeschränkungen Faradayscher Prozesse zu überwinden.
Mesoionic Carbene‐Catalyzed Formyl Alkylation of Aldehydes
Authors: Liu Chang , Zhang Zengyu , Zhao Liang‐Liang , Bertrand Guy , Yan Xiaoyu 
Published: April 2023

AbstractKetones are among the most useful functional groups in organic synthesis, and they are commonly encountered in a broad range of compounds with various applications. Herein, we describe the mesoionic carbene‐catalyzed coupling reaction of aldehydes with non‐activated secondary and even primary alkyl halides. This metal‐free method utilizes deprotonated Breslow intermediates derived from mesoionic carbenes (MICs), which act as super electron donors and induce the single‐electron reduction of alkyl halides. This mild coupling reaction has a broad substrate scope and tolerates many functional groups, which allows to prepare a diversity of simple ketones as well as bio‐active molecules by late‐stage functionalization.
A General and Practical Route to Functionalized Bicyclo[1.1.1]Pentane‐Heteroaryls Enabled by Photocatalytic Multicomponent Heteroarylation of [1.1.1]Propellane
Authors: Huang Weichen , Keess Sebastian , Molander Gary A. 
Published: April 2023

Abstract1‐Aryl‐substituted bicyclo[1.1.1]pentanes (BCPs) are an important class of BCP derivatives with widespread application in drug development. Most syntheses of these materials require multiple chemical steps via BCP electrophiles or nucleophiles derived from [1.1.1]propellane. Although one‐step, multicomponent radical cross‐coupling reactions could provide a more sustainable and rapid route to access diverse heteroarylated BCPs, current approaches are limited to tertiary alkyl radicals, leading to a decrease in their practical value. In this study, a conceptually different approach enabled by a radical multicomponent heteroarylation of [1.1.1]propellane to access functionalized heteroarylated BCPs is described. Importantly, this protocol is compatible with primary‐, secondary‐, and tertiary aliphatic radicals, as well as various fluoroalkyl radical sources, thus enabling rapid library generation of sought‐after BCP derivatives for drug development.
Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage
Authors: Wrogemann Jens Matthies , Lüther Marco Joes , Bärmann Peer , Lounasvuori Mailis , Javed Ali , Tiemann Michael , Golnak Ronny , Xiao Jie , Petit Tristan , Placke Tobias , Winter Martin 
Published: April 2023

AbstractFaradaic reactions including charge transfer are often accompanied with diffusion limitation inside the bulk. Conductive two‐dimensional frameworks (2D MOFs) with a fast ion transport can combine both—charge transfer and fast diffusion inside their porous structure. To study remaining diffusion limitations caused by particle morphology, different synthesis routes of Cu‐2,3,6,7,10,11‐hexahydroxytriphenylene (Cu3(HHTP)2), a copper‐based 2D MOF, are used to obtain flake‐ and rod‐like MOF particles. Both morphologies are systematically characterized and evaluated for redox‐active Li+ ion storage. The redox mechanism is investigated by means of X‐ray absorption spectroscopy, FTIR spectroscopy and in situ XRD. Both types are compared regarding kinetic properties for Li+ ion storage via cyclic voltammetry and impedance spectroscopy. A significant influence of particle morphology for 2D MOFs on kinetic aspects of electrochemical Li+ ion storage can be observed. This study opens the path for optimization of redox active porous structures to overcome diffusion limitations of Faradaic processes.
Effect of secondary vulcanization process on hydrophobic properties of fluororubber
Authors: Xu Zehua , Zhang Yanbin , Wang Xiaosen , Li Kangshuai , He Qiang 
Published: April 2023

AbstractIn order to study the influence of two‐stage vulcanization process on the hydrophobic characteristics of FKM, superhydrophobic surfaces were prepared based on template method (1000 mesh screen, 1600 mesh screen and 2000 mesh screen), and six kinds of FKM with micro‐rough surface were prepared by one‐stage vulcanization and two‐stage vulcanization process, respectively. At first, the influence of two‐stage vulcanization process on the physical and chemical properties of FKM was illustrated by characterizing the two‐dimensional convex structure, three‐dimensional roughness and chemical functional groups of FKM. Then, mechanical tests and wettability tests were carried out on different FKM prepared by primary vulcanization and secondary vulcanization. The results show that the hydrophobicity of FKM prepared by secondary vulcanization is improved compared with FKM prepared by primary vulcanization, and the contact angle of FKM prepared by secondary vulcanization can reach above 165°. The secondary vulcanization process enhances the hydrophobicity of FKM mainly by increasing the longitudinal size of the convex structure on the surface of FKM, homogenizing the sizes of the convex structure and pits on the surface of FKM, and increasing the roughness of FKM surface. In addition, in the process of secondary vulcanization, the chain reaction of FKM matrix occurred. In the matrix, the hydrophilic group OH disappears, and the polar hydrophilic group becomes nonpolar hydrophobic group.
Lubricating performance of polytetrafluoroethylene hybrid fabric composites with removed thermosetting resin at cryogenic temperatures
Authors: Wang Zidan , Ma Tianbao 
Published: April 2023

AbstractAt cryogenic temperatures, the higher friction coefficient of conventional fabric composites severely inhibits the application of hybrid polytetrafluoroethylene (PTFE)/amide fabric composites in pivotal tribological pairs such as plain bearings operated at low temperatures. In order to improve the lubricating properties of fabric composites at cryogenic and wide temperature ranges, a novel hybrid PTFE/Nomex fabric composite is prepared by peeling off the facial phenolic formaldehyde resin through the Hot‐Press Mechanical Stripping method, which is named Phenolic Formaldehyde Mechanical Stripping (PFMS). The friction coefficient of PFMS is 0.06 at 296 K, and can be as low as 0.1 at 123 K, reduced by up to 58% compared to conventional fabric composite without resin removal. Furthermore, the friction coefficient of PFMS first increases and then decreases as the temperature decreases, the turning point falls in the range around the temperature of 181 K, corresponding to the γ relaxation transition of the PTFE. The wear of the fabric composites, the microstructure, and the chemical composition of the transfer film are comprehensively investigated. The results demonstrate that thermal activation and increased mechanical properties contribute to friction coefficient variation above and below the temperature of 181 K, respectively.
A new bio‐based flame retardant simply synthesized: Improving the flame retardancy and thermal stability of low‐density polyethylene together with melamine cyanurate
Authors: Feng Xi , Wang Zhengyu , Ma Hongli , Dang Bo , Li Jianxi 
Published: April 2023

AbstractA novel bio‐based flame retardant, MHPA, was synthesized with magnesium hydroxide (MH) and phytic acid (PA) and was added to low‐density polyethylene (LDPE) with melamine cyanurate (MCA) to investigate the flame retardant, mechanical property and thermal stability of the LDPE composites. The limit oxygen index (LOI) and cone calorimeter test (CCT) results showed that the combination of MHPA and MCA can increase the LOI of LDPE composite to 21.6%, and its peak of heat release rate (pHRR), total heat release (THR) and total smoke production (TSP) values reduced by 46.8%, 20%, and 31.6% respectively compared with pure LDPE, while the residue after CCT was increased to 24.4%. Moreover, the addition of MCA can effectively improve the thermal stability of LDPE/MHPA composites and suppress their early decomposition.
Ru(II)‐Catalyzed Oxidative Cross‐Dehydrogenative Alkenylations of Aromatic Amides and Ketones with Unactivated Olefins
Authors: Giri Chandan Kumar , Mondal Sudeshna , Baidya Mahiuddin 
Published: April 2023

AbstractA weak coordination guided Ru(II)‐catalyzed oxidative functionalization of arenes with unactivated olefins is developed, offering a wide variety of ortho‐alkenylated benzamides, acetophenones, and benzophenone in high yields. The protocol accommodates several bioactive molecules and allows downstream synthetic manipulations leading to a 2,3‐benzodiazepine scaffold. The reaction features a reversible metalation step and favors a regioselective β‐hydride elimination event.
Ruling out feigned crime‐related amnesia? A response to Acklin (2022)
Authors: Rubenzer Steven James 
Published: April 2023

AbstractIn a recent paper, Acklin discussed a case of possible amnesia for a murder in terms of neurobiology, psychoanalysis, and personality assessment. Acklin accepted the defendant's claim of amnesia for the crime as genuine. The considerable literature that takes a skeptical view of crime‐related amnesia was not cited, and the possibility of feigning or malingering was “ruled out” with a single sentence that does not withstand scrutiny. A review of the literature on feigned amnesia suggests that it may not be possible to rule out malingering even if the best available tools are used: There has been minimal investigation of most validity tests and estimates of base rates of feigned amnesia for a crime vary widely and make estimates of Negative Predictor Power highly unreliable. Although one cannot know from the information presented if Acklin's defendant legitimately experienced amnesia, feigning could not be ruled out using an interview and the test data cited by Acklin. I call for a moratorium on publication of further articles on crime specific amnesia that do not conscientiously examine other potential explanations and do not use current best practices for assessing negative response bias.
“Everything's a fight”: A qualitative study of the cancer survivorship experiences of transgender and gender diverse Australians
Authors: Lisy Karolina , Kerr Lucille , Jefford Michael , Fisher Christopher 
Published: April 2023

AbstractBackgroundThere is widespread recognition of the need to achieve equitable outcomes for all cancer survivors. This requires understanding of the experiences and outcomes of vulnerable groups. People who identify as sexually or gender diverse are known to be at risk of inferior cancer and survivorship outcomes, however, the posttreatment survivorship experiences of transgender and gender diverse (TGD) people have not been well studied. This study explored the survivorship experiences of people who identify as TGD, focusing on the physical and psychological aspects of the posttreatment survivorship phase and their experiences of follow‐up cancer care.MethodsA qualitative study of 10 TGD cancer survivors. Interviews were transcribed verbatim and data were analyzed by thematic analysis.ResultsSix themes were generated from the data. TGD people reported (1) anxiety when attending appointments and avoidance of necessary follow‐up care, (2) experiences of transphobia and discrimination within oncology care settings and (3) lack of consideration of TGD identity by providers. Themes further describe (4) physical aspects of being both TGD and a cancer survivor, (5) absence of inclusive and diverse supportive care resources, as well as (6) positive growth after cancer.ConclusionApproaches to mitigate these issues are urgently called for. These include training in TGD health for health‐care providers, inclusion of TGD health in medical and nursing curricula, processes to collect and use gender identity and preferred pronoun data in clinical settings, and development of TGD‐inclusive information and peer‐support resources.
Cell‐Permeable Ubiquitin and Histone Tools for Studying Post‐translational Modifications
Authors: Tang Jia‐Hui , Shu Qing‐Yao , Guo Yan‐Yan , Zhu Huixia , Li Yi‐Ming 
Published: April 2023

AbstractProtein post‐translational modifications (PTMs) regulate nearly all biological processes in eukaryotic cells, and synthetic PTM protein tools are widely used to detect the activity of the related enzymes and identify the interacting proteins in cell lysates. Recently, the study of these enzymes and the interacting proteome has been accomplished in live cells using cell‐permeable PTM protein tools. In this concept, we will introduce cell penetrating techniques, the syntheses of cell‐permeable PTM protein tools, and offer some future perspective.
A Fluorophore‐Labeled Lysine Dendrimer with an Oxo‐Anion‐Binding Motif for Tracking Gene Transfection
Authors: Aldemir Nazli , Vallet Cecilia , Knauer Shirley K. , Schmuck Carsten , Hirschhäuser Christoph 
Published: April 2023

AbstractA transfection vector based on a peptide dendrimer (1) has been developed and its abilities for DNA binding and transport have been investigated. By attaching a fluorophore to the vector system (1*), several steps in the transfection process could be monitored directly. As DLS and AFM studies showed, the labeled vector 1* condensed DNA into tightly packed aggregates able to enter eukaryotic cells. Co‐localization experiments revealed that the ligand/plasmid complex is taken up by the endosomal pathway followed by an endosomal escape or lysosomal degradation. Afterwards, the plasmid DNA seems to enter the nucleus due to a breakdown of the nuclear envelope during mitosis, as only cells that have recently undergone mitosis showed H2B‐GFP expression.