bluuebunny/crossref_metadata_2025_split huggingface dataset:
« Paul Is Dead ». Une histoire médiatique du disque-conspiration
Authors: Lavoie Pierre 
Published: August 2023

Le 17 septembre 1969, un article publié dans un journal étudiant de l’Iowa expose les grandes lignes d’une rumeur qui court depuis quelques mois : Paul McCartney, le bassiste du groupe The Beatles, serait mort accidentellement quelques années plus tôt et aurait été remplacé par un double. Depuis les années 1970, de nombreux articles et ouvrages ont été consacrés à la frénésie médiatique provoquée par cette rumeur. Certain·e·s chercheur·euse·s en ont fait l’histoire culturelle, en retraçant ses différentes itérations, alors que d’autres ont tenté d’en déterminer les racines anthropologiques ou les ancrages sociologiques. L’auteur propose ici une rétrospective de ce phénomène médiatique et culturel de plus de 50 ans et se penche sur les caractéristiques, sur les qualités et sur l’historicité du disque à microsillons qui permettent de situer son rôle dans la propagation de la théorie « Paul Is Dead ».
Assessment of Shelf life of Chrysanthemum (Dendranthema x grandiflora Tzelev.) var. Marigold Flowers as Influenced by Phenophase Based Irrigation and Nutrition Schedule
Authors: Vijayakumar S. , Nair Sujatha A. , Kumar Rajiv , Bharathi T. Usha 
Published: August 2023

The present investigation was conducted in the Division of Flower and Medicinal Crops at the ICAR-Indian Institute of Horticultural Research, Bengaluru, to evaluate the influence of phenophase based irrigation and fertigation schedules on shelf life of chrysanthemum (Dendranthema x grandiflora Tzelev.) var. Marigold. The experiment comprised of three main plots (irrigation regimes) and five sub plots (nutrient regimes) and was laid out in split plot design with three replications. Irrigation regime at 0.8, 1.0 and 1.2 ER at vegetative, bud and flowering phases, respectively along with weekly fertigation of NPK @ 75:112.5:75 kg /ha (75% RDF) in three split doses of 40:20:20 % NPK during vegetative phase, 30:40:40 % NPK during bud phase and 30:40:40% NPK during flowering phase, recorded the maximum shelf life of flowers (12.15 days) whereas, the minimum shelf life (7.60 days) was observed in the irrigation regime at 0.6,0.8 and 1.0 ER at vegetative, bud and flowering phases, respectively along with conventional method soil application of recommended dose of fertilizer (100:150:100 Kg NPK/ha).The shelf life of flowers had significantly high positive association with the physiological parameters of the plant viz., relative water content (0.728), transpiration rate (0.201), single flower weight (0.559) and stomatal conductance rate (0.492). Whereas, the photosynthetic rate (0.214), diameter of the flower head (0.269) and estimated flower yield (0.047) were significantly and positively correlated with shelf life of flowers. However, the days taken for bud appearance (-0.250) was negatively associated with shelf life of flowers.
Influence of Row Ratio on Assessment of Yield and Economics of Wheat (Triticum aestivum) and Mustard (Brassica nigra) Intercropping System
Authors: Roy Shreya , Singh Rajesh , Choudhary Dilip , Pradhan Akankhya , Avantika  , Anand Shreyash , Singh Paritosh 
Published: August 2023

A field experiment was carried out during Rabi 2022 at Crop Research Farm, Department of Agronomy, SHUATS, Prayagraj (U.P) on the topic “Influence of Row Ratio on Assessment of Yield and Economics of Wheat (Triticum aestivum) and Mustard (Brassica nigra) Intercropping System”. to study treatments consisting with row Proportions with wheat and mustard intercropping. The soil of experimental plot was sandy loam in texture, nearly neutral in soil reaction (pH 8.0), low in organic carbon (0.28%), available N (225 kg/ha), available P (19.50 kg/ha) and available K (92 kg/ha). There were 8 treatments each being replicated thrice and laid out in Randomized Block Design. The findings discovered that treatment 1 (Sole wheat cropping) recorded significant andmaximum number of effective tillers/m2 (634.01), number of grains/spike (52.80), seed yield (4.02 t/ha), straw yield (6.73 t/ha) and Harvest index (37.39%) of wheat and treatment 2 (Sole mustard cropping) recorded significant and maximum number of siliqua/plant (210.47), number of seeds/siliqua (22.90), test weight (3.66 g), seed yield (1.27 t/ha), straw yield (2.65 t/ha) and Harvest index (32.33%) in mustard.However, Inter-cropping with wheat-mustard (4:1) rows recorded significant and higher Land Equivalent Ratio (1.11), Wheat equivalent yield (5,046 kg/ha).
Bio-efficacy of Sulfentrazone 39.6% SC against Weed Flora of Soybean
Authors: Yadahalli G. S. , Jadhav R. L. , Yadahalli Vidyavathi G. 
Published: August 2023

Inadequate weed control is one of the primary causes of a decrease in soybean production. Weeds compete for resources with crops (water, light and nutrients). This competition is especially important during the early stages of crop development, when production losses of up to 80 per cent are possible, and in extreme cases, harvest operations are hampered. As a result, the current study sought to identify an effective weed control practice in soybean.To assess the bio-efficacy of Sulfentrazone 39.6% SC as a post-emergent (PRE) herbicide for weed control in soybean. The experiment was laid in RCBD (Randomized complete Block Design). A field experiment was conducted at Agricultural Research Station, Bidar, University of Agricultural Sciences, Raichur, Karnataka, India during kharif seasons of 2019 and 2020. The study consisted seven treatments with three levels of Sulfentrazone as PRE (240, 360, and 480 g a.i ha-1), two check herbicides (Authority XL @ 360 g a.i. ha-1 and Pendimethalin @ 1 kg a.i ha-1as PRE), hand weeding twice at 20 and 40 days after sowing, and a weedy check replicated three times. Application of sulfentrazone 39.6%SC premergent herbicide significantly reduced weed density and dry biomass a during the critical period of crop-weed competition. Sulfentrazone 39.6% SC @ 360 g a.i. ha-1 (PRE) application resulted in significantly higher weed control efficiency (WCE), yield, and economics in soybean, which was comparable to Sulfentrazone 39.6% SC @ 480 g a.i. ha-1 (PRE) application. Hence, Application of sulfentrazone 39.6% SC @ 360 g a.i. ha-1 as pre emergent herbicide is advocated to the farmers in effective control of weeds.
Collaboration between local Indigenous and visiting non‐Indigenous researchers: Practical challenges and insights from a long‐term environmental monitoring program in the Canadian Arctic
Authors: Richard Samuel , Gilchrist H. Grant , Hennin Holly L. , Nguyen Vivian M. 
Published: August 2023

Abstract

There is a growing appreciation for the value of collaborative research projects involving local Indigenous and visiting non‐Indigenous researchers. Examples of such partnerships are now numerous and diverse, and best practices and respectful approaches have been well presented, including the five priorities of the National Inuit Strategy on Research (NISR) defined by Inuit Tapiriit Kanatami in Canada. However, the application of best practices remains challenging, and examples of ‘on‐the‐ground’ implementation remain scarce in the literature.

We present a practical case study in which scientists from the Federal Department of Environment and Climate Change Canada and Inuit have co‐delivered a multidecade‐long monitoring program of nesting common eider ducks Somateria mollissima in the Arctic. We review our experience as southern‐based government researchers in this collaboration. We reflect on successes and, more importantly, on the practical challenges that prevent the full implementation of best practices in our program.

First, we highlight challenges to co‐designing a data collection protocol that combines both Indigenous and Western scientific methods. We show how combining the strengths of Inuit Knowledge and rigorous random sampling design has led to a more powerful approach to eider population monitoring.

Second, we review how the federal government's administrative approaches are poorly suited for employing seasonal Indigenous workers living in remote communities, particularly in Canada. We argue that to deliver respectful employment and payment practices, the financial and hiring administration of collaborative projects must be based at the community level.

Finally, we show how sociocultural factors have made it challenging to ensure the safety of all field workers consistently. To increase their perceived value and uptake, we suggest that safety guidelines must be co‐designed by visiting researchers and local partners for each project to ensure that they are appropriate to the local culture, field conditions, and the nature of the fieldwork.

Based on our experience, we draw attention to gaps that still exist between the best practices of collaborative research and factors that hamper their practical implementation. We invite other research teams to do the same so that, collectively, we can improve collaborative approaches nationally and internationally.
Civicbase: An open‐source platform for deploying Quadratic Voting for Survey Research
Authors: Bassetti Madeline E. , Dias Gustavo , Chen Daniel L. , Mortoni Alan , Das Ritesh 
Published: August 2023

AbstractCivic engagement is increasingly becoming digital. The ubiquity of computing increases our technologically mediated interactions. Governments have instated various digitization efforts to harness these new facets of virtual life. What remains to be seen is if citizen political opinion, which can inform the inception and effectiveness of public policy, is being accurately captured. Civicbase is an open‐source online platform that supports the application of Quadratic Voting Survey for Research (QVSR), a novel survey method. In this paper, we explore QVSR as an effective method for eliciting policy preferences, optimal survey design for prediction, Civicbase's functionalities and technology stack, and Personal AI, an emerging domain, and its relevance to modeling individual political preferences.
Ultra‐Selective and Efficient Static/Dynamic Palladium Capture from Highly Acidic Solution with Robust Macrocycle‐Based Polymers
Authors: Wang Ying , Wu Yijie , Li Jihong , Li Qing , Yang Pinghua , Conradson Steven D. , Cai Yimin , Feng Wen , Yuan Lihua 
Published: August 2023

AbstractThe capture of palladium from spent nuclear fuel is crucial for the sustainable development of nuclear energy and resource recovery. One of the most challenging issues in this direction is the survival of adsorbents under extreme reprocessing conditions such as strongly acidic media and high radiation fields while still maintaining high extraction ability and selectivity. Herein, an approach to addressing this issue is reported by incorporating macrocycle into nitrogen‐rich covalent organic polymers (COPs). Dramatically outperforming current adsorbing materials, pillar[5]arene‐based COPs with pyridyl and triazolyl functionalities display record adsorption capacity for Pd(II) at 3 M HNO3 (403 mg g−1), extraordinary stability under 500 kGy gamma irradiation, and ultra‐high selectivity toward Pd(II) over both 17 coexisting cations and six anions. In particular, the material P5COP‐m‐BPT with the best performance also shows remarkable dynamic adsorption efficiency for Pd(II). This study not only provides a strategy to enhance all‐sided adsorption performance in palladium separation with nitrogen‐rich COPs materials but also demonstrates the superiority of customizing advanced materials with macrocycles.
Remote Asymmetric Bisvinylogous [4+2] Cycloaddition Reaction to Synthesize Spirocyclic Frameworks
Authors: Hidalgo‐León Raquel , Alberro Nerea , Cossío Fernando P. , Miguel Sansano José , de Gracia Retamosa María 
Published: August 2023

AbstractThe highly enantioselective organocatalytic synthesis of spirocyclic compounds by Diels‐Alder reactions via trienamine using cyclic 2,5‐dienones as bisvinylogous precursors and different nitroalkenes as dienophiles is described. The use of cinchonidine‐based primary amine as catalyst and benzoic acid as co‐catalyst has allowed the construction of a wide variety of spiro compounds containing three stereogenic centres in good yields and excellent diastereo‐ and enantioselectivities. Additionally, other dienophiles have been evaluated exhibiting different behaviour depending on the electron withdrawing group nature. Subsequent transformations have yielded complex structures with up to five stereocentres. The plausible reaction mechanism has been investigated by computational methods.
Genome‐material costs and functional trade‐offs in the autopolyploid Solidago gigantea (giant goldenrod) series
Authors: Walczyk Angela M. , Hersch‐Green Erika I. 
Published: August 2023

AbstractPremiseIncreased genome‐material costs of N and P atoms inherent to organisms with larger genomes have been proposed to limit growth under nutrient scarcities and to promote growth under nutrient enrichments. Such responsiveness may reflect a nutrient‐dependent diploid versus polyploid advantage that could have vast ecological and evolutionary implications, but direct evidence that material costs increase with ploidy level and/or influence cytotype‐dependent growth, metabolic, and/or resource‐use trade‐offs is limited.MethodsWe grew diploid, autotetraploid, and autohexaploid Solidago gigantea plants with one of four ambient or enriched N:P ratios and measured traits related to material costs, primary and secondary metabolism, and resource‐use.ResultsRelative to diploids, polyploids invested more N and P into cells, and tetraploids grew more with N enrichments, suggesting that material costs increase with ploidy level. Polyploids also generally exhibited strategies that could minimize material‐cost constraints over both long (reduced monoploid genome size) and short (more extreme transcriptome downsizing, reduced photosynthesis rates and terpene concentrations, enhanced N‐use efficiencies) evolutionary time periods. Furthermore, polyploids had lower transpiration rates but higher water‐use efficiencies than diploids, both of which were more pronounced under nutrient‐limiting conditions.ConclusionsN and P material costs increase with ploidy level, but material‐cost constraints might be lessened by resource allocation/investment mechanisms that can also alter ecological dynamics and selection. Our results enhance mechanistic understanding of how global increases in nutrients might provide a release from material‐cost constraints in polyploids that could impact ploidy (or genome‐size)‐specific performances, cytogeographic patterning, and multispecies community structuring.
Herbarium specimens reveal century‐long trait shifts in poison ivy due to anthropogenic CO2 emissions
Authors: Ng Molly , McCormick Alyssa , Utz Ryan M. , Heberling J. Mason 
Published: August 2023

AbstractPremisePrevious experimental studies have shown that poison ivy (Toxicodendron radicans; Anacardicaceae) responds to elevated CO2 with increased leaf production, water‐use efficiency, and toxicity (allergenic urushiol). However, long‐term field data suggest no increase in poison ivy abundance over time. Using herbarium specimens, we examined whether poison ivy and other species shifted leaf traits under natural conditions with increasing atmospheric CO2 (pCO2) over the past century.MethodsWe measured stomatal density, leaf area, leaf N, leaf C:N, leaf carbon isotope discrimination (Δleaf), and intrinsic water‐use efficiency (iWUE) from 327 specimens collected from 1838 to 2020 across Pennsylvania. We compared poison ivy's responses to two evolutionarily related tree species, Toxicodendron vernix and Rhus typhina (Anacardiacae) and one ecological analog, Parthenocissus quinquefolia (Vitaceae), a common co‐occurring liana.ResultsStomatal density significantly decreased (P < 0.05) in poison ivy and the ecologically similar liana P. quinquefolia over the past century, but did not change in the related trees T. vernix and R. typhina. None of these species showed significant trends in changes in leaf N or C:N. Surprisingly, in poison ivy, but not the other species, Δleaf increased with increased pCO2, corresponding to significant declines in iWUE over time.ConclusionsIn contrast to the results of short‐term experimental studies, iWUE decreased in poison ivy over the last century. Trait responses to pCO2 varied by species. Herbarium specimens suggest that realized long‐term plant physiological responses to increased CO2 may not be reflected in short‐term experimental growth studies, highlighting the value of collections.
High Valence State Sites as Favorable Reductive Centers for High‐Current‐Density Water Splitting
Authors: Li Shuo , Liu Yunxia , Feng Kun , Li Chengyu , Xu Jiabin , Lu Cheng , Lin Haiping , Feng Yong , Ma Ding , Zhong Jun 
Published: August 2023

AbstractElectrochemical water splitting is a promising approach for producing sustainable and clean hydrogen. Typically, high valence state sites are favorable for oxidation evolution reaction (OER), while low valence states can facilitate hydrogen evolution reaction (HER). However, here we proposed a high valence state of Co3+ in Ni9.5Co0.5−S−FeOx hybrid as the favorable center for efficient and stable HER, while structural analogues with low chemical states showed much worse performance. As a result, the Ni9.5Co0.5−S−FeOx catalyst could drive alkaline HER with an ultra‐low overpotential of 22 mV for 10 mA cm−2, and 175 mV for 1000 mA cm−2 at the industrial temperature of 60 °C, with an excellent stability over 300 h. Moreover, this material could work for both OER and HER, with a low cell voltage being 1.730 V to achieve 1000 mA cm−2 for overall water splitting at 60 °C. X‐ray absorption spectroscopy (XAS) clearly identified the high valence Co3+ sites, while in situ XAS during HER and theoretical calculations revealed the favorable electron capture at Co3+ and suitable H adsorption/desorption energy around Co3+, which could accelerate the HER. The understanding of high valence states to drive reductive reactions may pave the way for the rational design of energy‐related catalysts.
Turning on Asymmetric Catalysis of Achiral Metal‐Organic Frameworks by Imparting Chiral Microenvironment
Authors: Yang Ge , Shi Wenwen , Qian Yunyang , Zheng Xiao , Meng Zheng , Jiang Hai‐Long 
Published: August 2023

AbstractThe development of heterogeneous asymmetric catalysts has attracted increasing interest in synthetic chemistry but mostly relies on the immobilization of homogeneous chiral catalysts. Herein, a series of chiral metal–organic frameworks (MOFs) have been fabricated by anchoring similar chiral hydroxylated molecules (catalytically inactive) with different lengths onto Zr‐oxo clusters in achiral PCN‐222(Cu). The resulting chiral MOFs exhibit regulated enantioselectivity up to 83 % ee in the asymmetric ring‐opening of cyclohexene oxide. The chiral molecules furnished onto the catalytic Lewis sites in the MOF create multilevel microenvironment, including the hydrogen interaction between the substrate and the chiral −OH group, the steric hindrance endowed by the benzene ring on the chiral molecules, and the proximity between the catalytic sites and chiral molecules confined in the MOF pores, which play crucial roles and synergistically promote chiral catalysis. This work nicely achieves heterogeneous enantioselective catalysis by chiral microenvironment modulation around Lewis acid sites.
Application of Nanozymes in Biomedical Imaging
Authors: Yuan Guotao , Mai Yiyin , Chen Jieyao , Nie Yichu , Wang Chong , Liu Qinghua , Tian Xin , Pan Yue 
Published: August 2023

AbstractNanozymes are a type of artificial enzyme that possess both the unique properties and catalytic activities of nanomaterials. With the rapid development of nanotechnology and biomedicine, nanozymes provide potential opportunities for biomedical applications. In particular, nanozymes, combined with their unique physicochemical performance and enzymatic activity, have been extensively used for in vitro sensing and in vivo imaging. In this review, we systematically summarized the progress of nanozymes and their applications in in vivo imaging and finally proposed the challenges and prospects in the development of nanozymes in biomedical imaging.
Synergistic flame‐retardancy of lamellar cerium phenylphosphonate and aluminum diethylphosphinate towards suppressing “candlewick effect” of polyamide 6/carbon fiber composites
Authors: Chai Juan , Feng Wei , Yan Hongqiang , Xia Yan , Yang Yong , Wang Bingtao , Li Juan , Fang Zhengping , Guo Zhenghong 
Published: August 2023

AbstractIn order to improve the flame retardancy of carbon fiber reinforced polyamide 6 (PA6/CF) composites and eliminate the “candlewick effect” caused by CFs, a lamellar cerium phenylphosphonate (CeHPP) was synthetized through reflux method and combined with aluminum diethylphosphinate (ADP) to prepare flame retardant carbon fiber reinforced polyamide 6 (PA6/CF) composites. Transmission electron micrographs (TEM) showed that both CeHPPs and ADPs dispersed homogenously in PA6 matrix. Thermogravimetric analysis (TGA) indicated that CeHPPs had excellent thermal stability and abundant char residues. Compared to PA6/CF, the limiting oxygen index (LOI) of PA6/CF‐10ADP increased from 27.5% to 36.4%, with no melt droplets during burning. After replacing 2 wt% ADPs to CeHPPs, PA6/CF‐8ADP‐2CeHPP reached to UL‐94 V‐0 rating with a LOI of 35.6% and the total heat release (THR) decreased by 37.2% in cone calorimeter test. CeHPPs had good synergistic effect with ADPs, and CeHPPs could form a continuous and compact char layer in PA6/CF composites to block the combustible gas spillage and heat transfer along the CFs, thus significantly attenuating the “candlewick effect” and improving the flame retardancy of PA6/CF composites.
Ultrasonographic visualization of anatomical variations of the supraclavicular nerves
Authors: Bridgwater Hannah , Hector Lauren R. , Xiang Peter , Sardesai Neil , Brassett Cecilia , Sardesai Anand 
Published: August 2023

AbstractTypical anatomy of the supraclavicular nerve (SCN) is described as originating from the cervical plexus and dividing into medial, intermediate, and lateral branches. The SCN is vulnerable to injury during clavicular surgery, leading to altered sensation post‐operatively. There is also increasing interest in anesthetizing the SCN in shoulder or clavicular surgery. Utilizing a high‐frequency (20 MHz) ultrasound probe, 20 healthy volunteers were scanned, giving data for 40 SCNs. For each nerve, anatomical course and branches were graphically plotted using a custom Python 3.8.12 program and Microsoft Excel. Of 40 nerves, only 19 (47.5%) demonstrated a typical course, with the rest showing considerable variability of branching patterns. Crossing branches (CBs) were found in 24 (60%) with a total of 54. Just over half (29, 54.7%) of these crossed the clavicle lateral to its midpoint, with 32 (59.6%) CBs having a diameter of ≥25% compared to that of the SCN main trunk. The distance from the mid‐clavicular point at which the branches crossed the clavicle was recorded. This study demonstrated that over half the SCNs had atypical branching patterns with intra‐volunteer variability. Preoperative mapping may be useful in preventing injury and subsequent numbness.