bluuebunny/crossref_metadata_2025_split huggingface dataset:
Click Coupling of Flavylium Dyes with Plasmodione Analogues: Towards New Redox‐Sensitive Pro‐Fluorophores
Authors: Dupouy Baptiste , Cotos Leandro , Binder Annika , Slavikova Lucie , Rottmann Matthias , Mäser Pascal , Jacquemin Denis , Ganter Markus , Davioud‐Charvet Elisabeth , Elhabiri Mourad 
Published: December 2024

AbstractThe development of redox‐sensitive molecular fluorescent probes for the detection of redox changes in Plasmodium falciparum‐parasitized red blood cells remains of interest due to the limitations of current genetically encoded biosensors. This study describes the design, screening and synthesis of new pro‐fluorophores based on flavylium azido dyes coupled by CuAAC click chemistry to alkynyl analogues of plasmodione oxide, the key metabolite of the potent redox‐active antimalarial plasmodione. The photophysical and electrochemical properties of these probes were evaluated, focusing on their fluorogenic responses. The influence of both the redox status of the quinone and the length of the PEG chain separating the fluorophore from the electrophore on the photophysical properties was investigated. The fluorescence quenching by photoinduced electron transfer is reversible and of high amplitude for probes in oxidized quinone forms and fluorescence is reinstated for reduced hydroquinone forms. Our results demonstrate that shortening the PEG chain has the effect of enhancing the fluorogenic response, likely due to non‐covalent interactions between the two chromophores. All these systems were evaluated for their antiparasitic activities and fluorescence imaging suggests the efficacy of the fluorescent flavylium dyes in P. falciparum‐parasitized red blood cells, paving the way for future parasite imaging studies to monitor cellular redox processes.
Zero‐Dimensional Lead‐Free Perovskite Single Crystals for the Sensitive Detection of Visible Light and X‐Rays
Authors: Zhang Min , Lei Lin , Zheng Xiaojia 
Published: December 2024

AbstractThe excellent performance and facile fabrication process of perovskite semiconductor materials make them highly promising candidates in the field of optoelectronic devices. Whether for visible light or X‐rays, detectors with low detection limits can better identify weak light signals, significantly reducing the intensity of the received light source during device operation. In particular, for X‐ray detectors, reducing X‐ray dosage can greatly enhance the safety of X‐ray imaging technology. This work develops detectors with low detection limit based on zero‐dimensional (0D) MA3Bi2I9 single crystals. The anisotropy of MA3Bi2I9 and its influence on the detector‘s performance were investigated in detail. Detectors perpendicular to the (001) crystal plane have better weak light detection capability and require significantly less light intensity compared to devices parallel to the (001) crystal plane. X‐ray detector with a limit of detection (LoD) of 0.68 nGyair s−1 and sensitivity of 5072 μC Gyair−1 cm−2 was obtained. The present study offers comprehensive insights into the operational mechanism of layered perovskites, which can provide valuable guidelines for future designs and fabrications of highly sensitive photo and X‐ray detectors.
Interfacial Oxygen Vacancy of CuOx‐CeO2 Enhances H2O2 Activation and Pollutant Degradation
Authors: Song Chunli , Wang Tao , Xu Tian , Qian Jieshu 
Published: December 2024

AbstractIn the Fenton process, the development of catalysts with a wide pH range and good stability has been a long‐term goal for water treatment purpose. This study proposes a strategy to solve this problem by preparing supported catalysts CuOx@CeO2‐IE using an ion exchange reversed loading method. The generation of a large number of interfacial oxygen vacancies with Cu‐OV‐Ce (OV represents an oxygen vacancy site) structures prolongs the O−O bond of H2O2, promotes the rupture of the peroxide bond of H2O2, and thereby promotes the activation of H2O2 on the surface of the catalyst. The results show that with a H2O2 concentration of 5 mM and CuOx@CeO2‐IE at 50 mg/L, the removal rate of bisphenol A is 94.1 % in 60 min, in which • OH dominates the degradation process. Moreover, the system can operate well within a relatively wide pH range (4–8). This study provides a novel strategy for the design of Fenton catalysts with a wide pH suitability and excellent stability.
Hemilabile α‐Diimine Nickel Catalyzed Olefin Polymerization
Authors: Khan Muhammad Asadullah , Liu Yue , Pang Wenmin , Chen Ao , Chen Min 
Published: December 2024

Comprehensive SummaryFor coordination‐insertion olefin polymerization, the development of novel transition‐metal catalysts has drawn extensive attention in this field. In this contribution, we designed a series of hemilabile α‐diimine nickel catalysts bearing oxygen atom as neighboring group. The steric hindrance and oxygen atom number of these nickel complexes (Ni1—Ni4) could be adjusted, which influenced ethylene (co)polymerization processes. The introduction of oxygen atoms could enhance the thermal stability during ethylene polymerization for Ni2 compared to the counterpart without oxygen atoms. And for the copolymerization process of ethylene with polar monomers, higher catalytic activity (1.4 × 106 g·mol−1·h−1) and polar monomer incorporation ratio (1.2 mol%) were achieved. However, Ni4 with four oxygen atoms in this work was not active in ethylene polymerization due to the interaction between the oxygen atom and nickel catalytic center. The hemilabile effect in this work presented an example to enhance the stability of the α‐diimine nickel catalysts in olefin polymerization.
From Mn‐Triazine Crystalline Framework to MnOx@NC: Biomimetic Double‐Enzyme Activity and Labeling of Ascorbic Acid as Well as Application in Pharmaceuticals
Authors: Gai Shi‐Ping , Chen‐Wang  , Jiao Wen‐Na , Teng Bai‐Chong , Chi Yu‐Xian , Wang Yu‐Fei , Liu Yun‐Ling , Sun Li‐Xian , Xing Yong‐Heng , Bai Feng‐Ying 
Published: December 2024

Comprehensive SummaryImbalance in the levels of ascorbic acid (AA) can pose a risk to human health. Therefore, it's essential to establish an accurate method for the detection of AA. In this work, a novel N‐doped carbon composite (MnOx@NC) with dual enzyme‐like activities to detect AA was prepared by calcination of Mn‐MOF containing H3TTPCA ligand. Interestingly, the •O2− that leads to its oxidase‐like activity was not formed by dissolved oxygen, but came from the synergistic effect of lattice oxygen generated by calcination and the transformation of MnII/MnIII/MnIV, and the presence of H2O2 provided much •OH, which caused its peroxidase‐like activity. Meanwhile, the residual N element came from H3TTPCA ligand assisted the catalytic process. Accordingly, a dual‐signal sensing platform and smartphone‐assisted recognition for detection of AA was developed and a colorimetric sensor array was established to distinguish three antioxidants. This work also demonstrates considerable promise for the detection of AA in authentic pharmaceuticals.
Does environmental materiality matter to corporate financial performance: Evidence from 34 countries
Authors: Shen Siyu , Xie Jun , Fujii Hidemichi , Keeley Alexander Ryota , Managi Shunsuke 
Published: December 2024

AbstractThis study examines the financial implications of corporate environmental disclosure and performance across 34 countries, with a particular focus on industry‐specific materiality following the SASB accounting metrics. A multilevel regression model was applied to a global sample spanning 2015 to 2022 to investigate the firm‐level impacts while controlling for country‐level effects to account for the heterogeneity in business environments. The analysis revealed a positive relationship between corporate environmental performance, both overall and materiality‐based, and financial performance, including ROA and Tobin's Q. Notably, better environmental performance was significantly associated with decreased capital costs, particularly the cost of equity. However, materiality‐based environmental scores exhibited weaker impacts, likely due to the limited data availability and inconsistent global integration of materiality concepts. The research findings indicate that investors tend to favor companies with accountable environmental performance over those that rely solely on disclosure. These findings provide valuable insights for investors and business practitioners, emphasizing the importance of considering environmental materiality in corporate reporting and operations.
Climatic versus biotic drivers' effect on fitness varies with range size but not position within range in terrestrial plants
Authors: Louthan Allison M. , Baumgardner Aaron W. , Ehrlén Johan , Dahlgren Johan P. , Loomis Alexander K. , Morris William F. 
Published: December 2024

AbstractAll populations are affected by multiple environmental drivers, including climatic drivers such as temperature or precipitation and biotic drivers such as herbivory or mutualisms. The relative response of a population to each driver is critical to prioritizing threat mitigation for conservation and to understanding whether climatic or biotic drivers most strongly affect fitness. However, the importance of different drivers can vary dramatically across species and across populations of the same species. Theory suggests that the response to climatic versus biotic drivers can be affected by both the species' fundamental niche breadth and the latitude of the population at which the response is measured. However, we have few tests of how these two factors affect relative response to drivers separately, let alone tests of how niche breadth and latitude together influence responses. Here, we use a meta‐analysis of published studies on population response to climatic and biotic drivers in terrestrial plants, combined with estimates of climatic niche breadth and position within climatic niche derived from herbarium records, to show that species' niche breadth is the primary determinant of response to climatic versus biotic drivers. Namely, we find that response to climatic drivers changes only minimally with increasing niche breadth, while response to biotic drivers increases with niche breadth. We see similar relationships when considering range size instead of niche breadth. Surprisingly, we find no effects of latitude on the relative effect of climatic versus biotic drivers. Our work suggests that populations of species with small and large ranges experience similar extirpation risks due to the negative impacts of climate change. By contrast, populations of species with large (but not small) ranges may be highly susceptible to changes in densities or distributions of interacting species.
Drought before fire increases tree mortality after fire
Authors: Cansler C. Alina , Wright Micah C. , van Mantgem Phillip J. , Shearman Timothy M. , Varner J. Morgan , Hood Sharon M. 
Published: December 2024

AbstractFire and drought are expected to increase in frequency and severity in temperate forests due to climate change. To evaluate whether drought increases the likelihood of post‐fire tree mortality, we used a large database of tree survival and mortality from 32 years of wildland fires covering four dominant western North American conifers. We used Bayesian hierarchical modeling to predict the probability of individual tree mortality after fire based on species—Pinus contorta (lodgepole pine), Abies concolor (white fir), Pseudotsuga menziesii (Douglas‐fir), and Pinus ponderosa (ponderosa pine)—bark thickness, bark char, percentage live tree crown scorched or consumed crown volume scorch (CVS), and mean annual climatic water deficit (CWD) anomalies the year pre‐fire and fire year relative to the 1985–2015 reference period. Although crown injury was the primary determinant of tree mortality after fire, drought increased likelihood of death, with a 2‐SD increase in CWD (+115.7) resulting in a 78% increase in the probability of mortality. We assessed the crown scorch level expected to result in >50% probability of mortality under different CWD scenarios: observed CWD, CWD of +2, and +4°C warming scenarios. Increased climatic moisture stress amplified tree death, reducing the threshold that causes tree mortality across all conifers under +4°C warming, with more subtle and species‐specific reductions for the +2°C scenario. Models predicting post‐fire tree mortality are components of global and regional carbon estimates, habitat suitability assessments, and forest management planning and decision support systems. The amplifying effects of drought on post‐fire tree mortality and predicted future climates are likely to lead to higher tree mortality following fires in forested landscapes of western North America and may have cascading effects on ecosystem services and future forest resilience.
Threshold responses of freshwater fish community size spectra to invasive species
Authors: Novak Bradley , Murry Brent A. , Wesner Jeff S. , Gjoni Vojsava , Arantes Caroline C. , Shepta Erin , Pomeranz Justin P. F. , Junker James R. , Zipfel Kathrine , Stump Andrew , Solomon Levi E. , Maxson Kristopher A. , DeBoer Jason A. 
Published: December 2024

AbstractAquatic invasive species (AIS) threaten biodiversity and ecosystem services around the world, but their management has been hampered by the lack of quantifiable control targets. The introduction of Silver Carp (Hypophthalmichthys molitrix) throughout the mid‐western United States epitomizes both the impacts of AIS and the need for quantitative control targets. Silver Carp are large‐bodied planktivores that compete with native planktivores, which can cause cascading effects throughout the food web. Our study tested the threshold of abundance beyond which Silver Carp alter fish assemblage structure. We used a community size spectra (CSS) approach to evaluate fish community size structure across temporal and spatial gradients of Silver Carp abundances. We hypothesized that Silver Carp would flatten the size spectra slope because they are large‐bodied and feed at a low trophic position. Electrofishing data were obtained for the La Grange Pool of the Illinois River (1994–2021) and for six pools of the Ohio River (2015–2020). Results supported our hypothesis, showing a 98% probability that the relative biomass of Silver Carp is positively related to the CSS slope (resulting in “flattening”). This pattern was strongest in the Illinois River, where Silver Carp made up >30% of fish assemblage biomass in recent years. The pattern was weakest in the Ohio River (78% probability of a positive relationship) where Silver Carp rarely exceeded 20% of total fish biomass. Subsequent changepoint models indicated that a Silver Carp relative biomass of ~24% represents a threshold below which negative food web impacts should be minimized. Our study demonstrates a clear shift in fish community size structure following invasion by Silver Carp and suggests that pre‐invasion CSS slopes may serve as a restoration target. It also illustrates the benefits of CSS to guide Silver Carp and other AIS management.
Accumulation of sodium and manganese during litter decomposition of Qinghai spruce (Picea crassifolia) forest in China
Authors: Zhao Xinning , Zang Fei , Huang Fangyuan , Li Na , Zhao Chuanyan 
Published: December 2024

AbstractLitter decomposition is a key ecological process as a control on nutrient cycling in forest ecosystems. Forest litter is an important carrier of element cycles in forest ecosystems. The biogeochemical cycle of elements is of great significance to plant communities and ecosystem functions. At present, most of the studies on the litter major elements have focused only on C, N, and P, and there are few studies on the biogeochemical cycle of sodium (Na) and manganese (Mn) of forest litter. In this study, we investigated the concentrations and fluxes of Na and Mn in needle litter of Qinghai spruce over a 12‐month period. We measured the release and accumulation dynamics of litter Na and Mn during litter decomposition at different canopy coverage and elevations over 3.9 years. The results show that the annual Na and Mn concentrations were 312.34 and 621.19 mg kg−1, and the annual fluxes of Na and Mn were 236.67 and 343.16 g ha−1 in needle litter, respectively. After 3.9 years of litter decomposition, Na released 15.6% and Mn accumulated 93.4% compared to the initial concentration. The concentration of Na and Mn in needle litter both accumulated fastest at low canopy coverage. The concentrations of Na and Mn were different at various elevations, but there was no obvious regularity. These results illustrate the seasonal characteristics of litter element return and nutrient cycling during litter decomposition in typical coniferous forests in the Qilian Mountains and could provide basic data and theoretical basis for ecological protection in the Qilian Mountains.
The temporal scale of energy maximization explains allometric variations in movement decisions of large herbivores
Authors: Fortin Daniel , Brooke Christopher F. , Fritz Hervé , Venter Jan A. 
Published: December 2024

AbstractEmpirical testing of energy maximization models has been used to clarify the drivers of resource partitioning among large herbivores. Most studies, however, have not considered that predictions of optimal diet depend on the temporal scale of maximization. This omission can hinder the effectiveness of optimality principles in elucidating animal distributions, dietary choices, and the dynamics of species coexistence. We used movement analysis and scale‐dependent energy gain modeling to study how three large herbivores share resources: red hartebeest (Alcelaphus buselaphus), a 120‐kg grazing ruminant; zebra (Equus quagga), a 300‐kg grazing nonruminant; and eland (Tragelaphus oryx), a 460‐kg ruminant, mixed feeder. We found that resource partitioning was achieved through a synergy of spatial segregation and interspecies differences in habitat selection and in the temporal scale of energy maximization. Radio‐collared individuals of the three species spent 95% of their time >850 m from one another. Hierarchical movement analysis revealed that red hartebeest and zebra selected grasslands within which they selected patches maximizing their daily energy gains. Selection was particularly strong for red hartebeest, as expected for a ruminant of relatively small size. Unlike the other species, eland avoided grasslands; when they ventured into grasslands, they selected patches offering high short‐term energy gains at the expense of daily gains. This selection for rapid energy gain could reflect relatively high missed opportunity costs when foraging in grasslands due to the broad range of feeding opportunities for this large mixed feeder. This finding is also consistent with the notion that larger herbivores tend to face stronger constraints from resources availability than digestibility. Overall, differences in selection strength and foraging currencies among these large herbivores are consistent with allometric theory. Our study illuminates the drivers of resource partitioning that can promote the coexistence of large herbivore species, while also showing that, to provide a useful and robust basis to explain animal movement and resource partitioning, energetic models should be based on a relevant scale of energy maximization.
SPARCL1 and NT‐proBNP as biomarkers of right ventricular‐to‐pulmonary artery uncoupling in pulmonary hypertension
Authors: Dörr Oliver , Keranov Stanislav , van Wickern Paulina , Nef Holger , Hamm Christian , Bauer Pascal , Troidl Christian , Sossalla Samuel , Voss Sandra , Liebetrau Christoph , Richter Manuel J. , Gall Henning , Seeger Werner , Ghofrani Ardeschir , Yogeswaran Athiththan , Tello Khodr 
Published: December 2024

AbstractAimsSPARCL1 was recently identified as a biomarker of right ventricular (RV) maladaptation in patients with pulmonary hypertension (PH), and N‐terminal pro‐brain natriuretic protein (NT‐proBNP) is an established biomarker of RV failure in PH. The present study investigated whether NT‐proBNP and SPARCL1 concentrations are associated with load‐independent parameters of RV function and RV‐to‐pulmonary artery (RV–PA) coupling as measured using invasive pressure–volume (PV) loops in the RV.MethodsSPARCL1 and NT‐proBNP were measured in the plasma of patients with idiopathic pulmonary artery hypertension (IPAH, n = 73). Participants without LV or RV abnormalities served as controls (n = 28). All patients underwent echocardiography and right heart catheterization with invasive PV loop measurements.ResultsOur cohort had more females with IPAH than the control group (64% vs. 35%; P = 0.01) and was older [69 (interquartile range, IQR 57–76) vs. 51 (IQR 35–62) years; P < 0.001]. SPARCL1 and NT‐proBNP levels were significantly higher in patients with IPAH as compared with controls (P < 0.0001). Patients with IPAH and maladaptive RV remodelling had higher SPARCL1 and NT‐proBNP concentrations than those with adaptive RV remodelling (P < 0.01). Both SPARCL1 and NT‐proBNP were good predictors of maladaptive RV remodelling in receiver operating characteristic analysis [area under the curve (AUC) (AUCSPARCL1 = 0.75, AUCNT‐proBNP = 0.72, P = 0.36 for AUCSPARCL1 vs. AUCNT‐proBNP]. The combined predictive value of SPARCL1 and NT‐proBNP (AUC 0.78, P < 0.001) for maladaptive RV was numerically higher than that of either SPARCL1 or NT‐proBNP alone (P = 0.16 for AUCSPARCL1 + NT‐proBNP vs. AUCNT‐proBNP and P = 0.18 for AUCSPARCL1 + NT‐proBNP vs. AUCSPARC1). SPARCL1 showed numerically a tendency for a better predictive power than NT‐proBNP for parameters of early maladaptive RV remodelling such as RV ejection fraction < 50% (AUCSPARCL1 = 0.77, AUCNT‐proBNP = 0.67, P = 0.06 for AUCSPARCL1 vs. AUCNT‐proBNP), RV end‐diastolic diameter > 42 mm (AUCSPARCL1 = 0.72, AUCNT‐proBNP = 0.65, P = 0.19 for AUCSPARCL1 vs. AUCNT‐proBNP) and RV end‐systolic volume index RVESVI > 31 mL/m2 (AUCSPARCL1 = 0.78, AUCNT‐proBNP = 0.71, PP = 0.10 for AUCSPARCL1 vs. AUCNT‐proBNP).ConclusionsSPARCL1 and NT‐proBNP are good predictors of maladaptive RV remodelling and RV–PA uncoupling in IPAH patients. SPARCL1 may be a better predictor of early maladaptive RV remodelling than NT‐proBNP.
A multi‐tagged SAR ocean image dataset identifying atmospheric boundary layer structure in winter tradewind conditions
Authors: Wang Chen , Stopa Justin E. , Vandemark Doug , Foster Ralph , Ayet Alex , Mouche Alexis , Chapron Bertrand , Sadowski Peter 
Published: December 2024

AbstractA dataset of multi‐tagged sea surface roughness synthetic aperture radar (SAR) satellite images was established near Barbados from January to June 2016 to 2019. It is an advancement of the Sentinel‐1 Wave Mode TenGeoP‐SARwv (a labelled SAR imagery dataset of 10 geophysical phenomena from Sentinel‐1 wave mode) dataset that targets SAR marine atmospheric boundary layer (MABL) coherent structures. Twelve tags define roll vortices, convective cells, mixed rolls and convective cells, fronts, rain cells, cold pools and low winds. Examples are provided for each signature. The final dataset is comprised of 2100 Sentinel‐1 wave mode SAR images acquired at 36 incidence angle over an 8° × 8°region centered at 51° W, 15° N. Each image is tagged with one or multiple phenomena by five experts. This strategy extends the TenGeoP‐SARwv by identifying coexisting phenomena within a single SAR image and by the addition of mixed roll/cell states and cold pools. The dataset includes PNG‐formatted SAR image files along with two text files containing the file name, the central latitude/longitude, expert tags for each image, and all dataset metadata. There is a high degree of consensus among expert tags. The dataset complements existing hand‐labelled ocean SAR image datasets and offers the potential for new deep‐learning SAR image classification model developments. Future use is also expected to yield new insights into the tradewind MABL processes such as structure transitions and their relation to the stratification.