bluuebunny/crossref_metadata_2025_split huggingface dataset:
Doubly robust estimation for non‐probability samples with modified intertwined probabilistic factors decoupling
Authors: Liu Zhan , Zheng Junbo , Pan Yingli 
Published: February 2023

AbstractIn recent years, non‐probability samples, such as web survey samples, have become increasingly popular in many fields, but they may be subject to selection biases, which results in the difficulty for inference from them. Doubly robust (DR) estimation is one of the approaches to making inferences from non‐probability samples. When many covariates are available, variable selection becomes important in DR estimation. In this paper, a new DR estimator for the finite population mean is constructed, where the intertwined probabilistic factors decoupling (IPAD) and modified IPAD are used to select important variables in the propensity score model and the outcome superpopulation model, respectively. Unlike the traditional variable selection approaches, such as adaptive least absolute shrinkage and selection operator and smoothly clipped absolute deviations, IPAD and the modified IPAD not only can select important variables and estimate parameters, but also can control the false discovery rate, which can produce more accurate population estimators. Asymptotic theories and variance estimation of the DR estimator with a modified IPAD are established. Results from simulation studies indicate that our proposed estimator performs well. We apply the proposed method to the analysis of the Pew Research Center data and the Behavioral Risk Factor Surveillance System data.
Epochal turns: Uncomfortable insights, uncertain outlooks
Authors: Spangenberg Joachim H. , Kurz Rudi 
Published: February 2023

AbstractThe perfect storm of converging political, security, environmental and social crises enforces an epochal turn. Necessarily increasing defensive expenditures for health and climate damage compensation combine with climate adaptation and increased security spending to drive already sluggish economic growth rates into negative territory. The result will by accelerating degrowth, an end to just‐in‐time production concepts, higher resource cost, new dependencies on metal exporters (some of them as nasty as Putin's Russia), and decreasing median incomes. Without significant U‐turns on tax and distribution policies, funds will be lacking to address the challenges. Rather than promising easy ways out of the crises, stopping the drivers, focussing on well‐being instead of growth, and exploring ways to a dignified life within the crises need to be political priorities.
Oxidation of TDMQ20, a Specific Copper Chelator as Potential Drug Against Alzheimer's Disease
Authors: Nguyen Michel , Li Youzhi , Robert Anne , Liu Yan , Meunier Bernard 
Published: February 2023

AbstractDeveloped as a regulator of copper homeostasis in the brain of patients affected by Alzheimer's disease (AD), TDMQ20 is a specific copper(II) chelator able to restore short term memory in AD mice. To anticipate on metabolic studies of this drug‐candidate, here we report the catalytic oxidation of TDMQ20 by a biomimetic system reminiscent of P450 oxidation, using a metalloporphyrin and hydrogen persulfate as oxidant. Oxidation products were mainly characterized by HPLC with UV‐visible spectrometry or high‐resolution mass spectrometry detection. In these conditions, TDMQ20 was readily oxidized by aromatic hydroxylation, oxidation of 1,4‐diphenol or 1,4‐aminophenol to 1,4‐quinone or quinone‐imine, respectively, or oxidative chlorination. These putative metabolites were water‐soluble, suggesting that the drug‐candidate might be easily metabolized and excreted in vivo.
Optical Effect Modulation in Polarized Raman Spectroscopy of Transparent Layered α‐MoO3
Authors: Zou Bo , Wang Xiaonan , Zhou Yu , Zhou Yan , Wu Yanyan , Xing Tiantian , He Yang , Yang Jinfeng , Chen Yuxiang , Ren Peng , Sun Huarui 
Published: February 2023

AbstractOptical anisotropy, which is quantified by birefringence (Δn) and linear dichroism (Δk), can significantly modulate the angle‐resolved polarized Raman spectroscopy (ARPRS) response of anisotropic layered materials (ALMs) by external interference. This work studies the separate modulation of birefringence on the ARPRS response and the intrinsic response by selecting transparent birefringent crystal α‐MoO3 as an excellent platform. It is found that there are several anomalous ARPRS responses in α‐MoO3 that cannot be reproduced by the real Raman tensor widely used in non‐absorbing materials; however, they can be well explained by considering the birefringence‐induced Raman selection rules. Moreover, the systematic thickness‐dependent study indicates that birefringence modulates the ARPRS response to render an interference pattern; however, the amplitude of modulation is considerably lower than that by linear dichroism as occurred in black phosphorous. This weak modulation brings convenience to the crystal orientation determination of transparent ALMs. Combining the atomic vibrational pattern and bond polarizability model, the intrinsic ARPRS response of α‐MoO3 is analyzed, giving the physical origins of the Raman anisotropy. This study employs α‐MoO3 as an example, although it is generally applicable to all transparent birefringent ALMs.
Sequential Separation of Linear, Mono‐, and Di‐Branched Hexane Isomers on a Robust Coordination Polymer with Nonbonding Flexibility
Authors: Chen Rundao , Li Liangying , Olson David H. , Guo Lidong , Chen Lihang , Yang Qiwei , Xu Qianqian , Zhang Zhiguo , Ren Qilong , Li Jing , Bao Zongbi 
Published: February 2023

AbstractEfficient separation of hexane isomers is a crucial process for upgrading gasoline. Herein, the sequential separation of linear, mono‐, and di‐branched hexane isomers by a robust stacked 1D coordination polymer termed as Mn‐dhbq ([Mn(dhbq)(H2O)2], H2dhbq = 2,5‐dihydroxy‐1,4‐benzoquinone) is reported. The interchain space of the activated polymer is of optimal aperture size (5.58 Å) that could exclude 2,3‐dimethylbutane, while the chain structure can discriminate n‐hexane with high capacity (1.53 mmol g−1 at 393 K, 6.67 kPa) by high‐density open metal sites (5.18 mmol g−1). With the temperature‐ and adsorbate‐dependent swelling of interchain spaces, the affinity between 3‐methylpentane and Mn‐dhbq can be deliberately controlled from sorption to exclusion, and thus a complete separation of ternary mixture can be achieved. Column breakthrough experiments confirm the excellent separation performance of Mn‐dhbq. The ultrahigh stability and easy scalability further highlight the application prospect of Mn‐dhbq for separation of hexane isomers.
Carbon Nanotube Diodes Operating at Frequencies of Over 50 GHz
Authors: Xue Chenqiao , Wu Weifeng , Yang Yingjun , Zhou Jianshuo , Ding Li , Wang Sheng 
Published: February 2023

AbstractRadiofrequency (RF) diodes used for fifth and sixth‐generation (5G and 6G) mobile and wireless communication networks generally require ultrahigh cut‐off frequencies and high integration densities of devices with different functions on a single chip and at low cost. Carbon nanotube diodes are promising devices for radiofrequency applications, but the cut‐off frequencies are still far below the theoretical estimates. Here, a carbon nanotube diode that operates in the millimeter‐wave frequency bands and is based on solution‐processed, high‐purity carbon nanotube network films is reported. The carbon nanotube diodes exhibit an intrinsic cut‐off frequency over 100 GHz and the as‐measured bandwidth can exceed 50 GHz at least. Furthermore, The rectification ratio of the carbon nanotube diode by approximately three times by using yttrium oxide for local p‐type doping in the diode channel is improved.
Properties of the “Z”‐Phase in Mn‐Rich P2‐Na0.67Ni0.1Mn0.8Fe0.1O2 as Sodium‐Ion‐Battery Cathodes
Authors: Feng Jie , Luo Shao‐hua , Qian Lixiong , Yan Shengxue , Wang Qing , Ji Xianbing , Zhang Yahui , Liu Xin , Hou Pengqing , Teng Fei 
Published: February 2023

AbstractP2 layered oxides have attracted more and more attention as cathode materials of high‐power sodium‐ion batteries (SIBs). During the charging process, the release of sodium ions leads to layer slip, which leads to the transformation of P2 phase into O2 phase, resulting in a sharp decline in capacity. However, many cathode materials do not undergo P2‐O2 transition during charging and discharging, but form a “Z” phase. It is proved that the iron‐containing compound Na0.67Ni0.1Mn0.8Fe0.1O2 formed the “Z” phase of the symbiotic structure of the P phase and O phase during high‐voltage charging through ex‐XRD and HAADF‐STEM. During the charging process, the cathode material undergoes a structural change of P2‐OP4‐O2. With the increase of charging voltage, the O‐type superposition mode increases to form an ordered OP4 phase, and the P2‐type superposition mode disappears after further charging to form a pure O2 phase. 57Fe‐Mössbauer spectroscopy revealed that no migration of Fe ions is detected. The O–Ni–O–Mn–Fe–O bond formed in the transition metal MO6 (M = Ni, Mn, Fe) octahedron can inhibit the elongation of the Mn–O bond and improve the electrochemical activity so that P2‐Na0.67Ni0.1Mn0.8Fe0.1O2 has an excellent capacity of 172.4 mAh g−1 and a coulombic efficiency close to 99% at 0.1C.
Bonding Lithium Metal with Garnet Electrolyte by Interfacial Lithiophobicity/Lithiophilicity Transition Mechanism over 380 °C
Authors: Jin Yang , Lu Hongfei , Lyu Nawei , Jiang Xin , Zhang Di , Zhang Zili , Xu Jing , Sun Bin , Liu Kai , Wu Hui 
Published: February 2023

AbstractGarnet electrolytes, possessing high ionic conductivity (10−4–10−3 S cm−1 at room temperature) and excellent chemical/electrochemical compatibility with lithium metal, are expected to be used in solid‐state lithium metal batteries. However, the poor solid–solid interfacial contact between lithium and garnet leads to high interfacial resistance, reducing the battery power capability and cyclability. Garnet electrolytes are commonly believed to be intrinsically lithiophilic, and lithiophobic Li2CO3 on the garnet surface accounted for the poor interfacial contact. Here, it is proposed that the interfacial lithiophobicity/lithiophilicity of garnets (LLZO, LLZTO) can be transformed above a temperature of ≈380 °C. This transition mechanism is also suitable for other materials such as Li2CO3, Li2O, stainless steel, and Al2O3. By using this transition mechanism, uniform and even lithium can be strongly bonded no‐surface‐treated garnet electrolytes with various shapes. The Li–LLZTO interfacial resistance can be reduced to ≈3.6 Ω cm2 and sustainably withstood lithium extraction and insertion for up to 2000 h at 100 µA cm−2. This high‐temperature lithiophobicity/lithiophilicity transition mechanism can help improve the understanding of lithium–garnet interfaces and build practical lithium–garnet solid–solid interfaces.
Determination of benzimidazole pesticide residues in soil by ultrasound‐assisted supramolecular solvent microextraction
Authors: Hu Jiabao , Yang Yuqi , Guan Yunlei , Li Rui , Liu Chunxiao , Yao Guojun , Zhao Wenting 
Published: February 2023

AbstractThe objective of this study was to develop a simple, rapid, and efficient pretreatment method using a supramolecular solvent as the extractant combined with high‐performance liquid chromatography‐ultraviolet to detect benzimidazole residues in environmental soil. The supramolecular solvent was composed of long‐chain alcohols, tetrahydrofuran, and water in proportion, showing excellent solubility and polarity range, so a supramolecular solvent microextraction method was established. The optimum method was identified by optimizing the types of long‐chain alcohols, the alcohol/tetrahydrofuran ratio, the pH, the amount of extractant, and the extraction time. The detection limits were 12.1–39.9 μg/kg with a relative standard deviation between 1.2% and 3.2% (n = 6). The recoveries ranged between 56.6% and 86.1%, and the linear relationship was good. The correlation coefficient (r2) was 0.9843 ‐ 0.9998. This method was then used to measure five benzimidazoles (thiabendazole, albendazole sulfone, ophendazole, albendazole, and fendazole) in soil samples.
Ion Transport in Glyme‐ and Sulfolane‐Based Highly Concentrated Electrolytes
Authors: Shigenobu Keisuke , Sudoh Taku , Murai Junichi , Dokko Kaoru , Watanabe Masayoshi , Ueno Kazuhide 
Published: February 2023

AbstractHighly concentrated electrolytes (HCEs) have a similarity to ionic liquids (ILs) in high ionic nature, and indeed some of HECs are found to behave like an IL. HCEs have attracted considerable attention as prospective candidates for electrolyte materials in future lithium secondary batteries owing to their favorable properties both in the bulk and at the electrochemical interface. In this study, we highlight the effects of the solvent, counter anion, and diluent of HCEs on the Li+ ion coordination structure and transport properties (e. g., ionic conductivity and apparent Li+ ion transference number measured under anion‐blocking conditions,
). Our studies on dynamic ion correlations unveiled the difference in the ion conduction mechanisms in HCEs and their intimate relevance to
values. Our systematic analysis of the transport properties of HCEs also suggests the need for a compromise to simultaneously achieve high ionic conductivity and high
values.
Validation of the Swedish Trauma Registry (SweTrau)
Authors: Holmberg Lina , Frick Bergström Monica , Mani Kevin , Wanhainen Anders , Andréasson Håkan , Linder Fredrik 
Published: February 2023

Abstract
Purpose
Validation of registries is important to ensure accuracy of data and registry-based research. This is often done by comparisons of the original registry data with other sources, e.g. another registry or a re-registration of data. Founded in 2011, the Swedish Trauma Registry (SweTrau) consists of variables based on international consensus (the Utstein Template of Trauma). This project aimed to perform the first validation of SweTrau.

Methods
On-site re-registration was performed on randomly selected trauma patients and compared to the registration in SweTrau. Accuracy (exact agreement), correctness (exact agreement plus data within acceptable range), comparability (similarity with other registries), data completeness (1-missing data) and case completeness (1-missing cases) were deemed as either good ($$\ge$$
≥
85%), adequate (70–84%) or poor (< 70%). Correlation was determined as either excellent ($$\ge$$
≥
0.8), strong (0.6–0.79), moderate (0.4–0.59) or weak (< 0.4).

Results
The data in SweTrau had good accuracy (85.8%), correctness (89.7%) and data completeness (88.5%), as well as strong or excellent correlation (87.5%). Case completeness was 44.3%, however, for NISS > 15 case completeness was 100%. Median time to registration was 4.5 months, with 84.2% registered one year after the trauma. The comparability showed an accordance with the Utstein Template of Trauma of almost 90%.

Conclusions
The validity of SweTrau is good, with high accuracy, correctness, data completeness and correlation. The data are comparable to other trauma registries using the Utstein Template of Trauma; however, timeliness and case completeness are areas of improvement.
Spatially associated or composite life traces from Holocene paleosols and dune sands provide evidence for past biotic interactions
Authors: Hsieh Shannon , Uchman Alfred 
Published: February 2023

AbstractBiotic interactions (e.g., predation, competition, commensalism) where organisms directly or indirectly influenced one another are of great interest to those studying the history of life but have been difficult to ascertain from fossils. Considering the usual caveats about the temporal resolution of paleontological data, traces and trace fossils in the sedimentary record can record co-occurrences of organisms or their behaviours with relatively high spatial fidelity in a location. Neoichnological studies and studies on recently buried traces, where direct trophic links or other connections between tracemakers are well-known, may help interpret when and where overlapping traces represented true biotic interactions. Examples from Holocene paleosols and other buried continental sediments in Poland include the tight association between mole and earthworm burrows, forming an ichnofabric representing a predator–prey relationship, and that of intersecting insect and root traces demonstrating the impact of trees as both ecosystem engineers and the basis for food chains. Trampling by ungulates, which leaves hoofprints and other sedimentary disturbances, may result in amensal or commensal effects on some biota in the short term and create heterogeneity that later trace-making organisms, such as invertebrate burrowers, can also respond to in turn, though such modified or composite traces may be challenging to interpret.
Child care costs, household liquidity constraints, and gender inequality
Authors: Casarico Alessandra , Del Rey Elena , Silva Jose I. 
Published: February 2023

AbstractIn a model with endogenous female labour supply and wages, we show that liquidity constraints that prevent households from buying child care generate an inefficiency and amplify gender gaps in the labour market. We evaluate the relative merits of paid maternity leave, child care subsidies, and government loans in mitigating liquidity constraints and promoting gender equality. While an extension in the duration of the leave has ambiguous effects, child care subsidies and loans in the form of child care vouchers remove the liquidity constraints and reduce gender gaps in participation and wages. We illustrate the mechanisms at play in a numerical example using Spanish data.
The Gell-Mann–Brueckner Formula for the Correlation Energy of the Electron Gas: A Rigorous Upper Bound in the Mean-Field Regime
Authors: Christiansen Martin Ravn , Hainzl Christian , Nam Phan Thành 
Published: February 2023

AbstractWe prove a rigorous upper bound on the correlation energy of interacting fermions in the mean-field regime for a wide class of interaction potentials. Our result covers the Coulomb potential, and in this case we obtain the analogue of the Gell-Mann–Brueckner formula $$c_{1}\rho \log \left( \rho \right) +c_{2}\rho $$

c
1

ρ
log

ρ

+

c
2

ρ

in the high density limit. We do this by refining the analysis of our bosonization method to deal with singular potentials, and to capture the exchange contribution which is absent in the purely bosonic picture.
Synthesis of 12-aminododecenoic acid by coupling transaminase to oxylipin pathway enzymes
Authors: Coenen Anna , Ferrer Manuel , Jaeger Karl-Erich , Schörken Ulrich 
Published: February 2023

Abstract
Biobased polymers derived from plant oils are sustainable alternatives to petro based polymers. In recent years, multienzyme cascades have been developed for the synthesis of biobased ω-aminocarboxylic acids, which serve as building blocks for polyamides. In this work, we have developed a novel enzyme cascade for the synthesis of 12-aminododeceneoic acid, a precursor for nylon-12, starting from linoleic acid. Seven bacterial ω-transaminases (ω-TAs) were cloned, expressed in Escherichia coli and successfully purified by affinity chromatography. Activity towards the oxylipin pathway intermediates hexanal and 12-oxododecenoic acid in their 9(Z) and 10(E) isoforms was demonstrated for all seven transaminases in a coupled photometric enzyme assay. The highest specific activities were obtained with ω-TA from Aquitalea denitrificans (TRAD), with 0.62 U mg−1 for 12-oxo-9(Z)-dodecenoic acid, 0.52 U mg−1 for 12-oxo-10(E)-dodecenoic acid and 1.17 U mg−1 for hexanal. A one-pot enzyme cascade was established with TRAD and papaya hydroperoxide lyase (HPLCP-N), reaching conversions of 59% according to LC-ELSD quantification. Starting from linoleic acid, up to 12% conversion to 12-aminododecenoic acid was achieved with a 3-enzyme cascade comprising soybean lipoxygenase (LOX-1), HPLCP-N and TRAD. Higher product concentrations were achieved by the consecutive addition of enzymes compared to simultaneous addition at the beginning.

Key points
• Seven ω-transaminases converted 12-oxododecenoic acid into its corresponding amine.
• A three-enzyme cascade with lipoxygenase, hydroperoxide lyase, and ω-transaminase was established for the first time.
• A one-pot transformation of linoleic acid to 12-aminododecenoic acid, a precursor of nylon-12 was achieved.

Graphical Abstract
Synovial plica of the elbow — detailed measurements and how to implicate its relevance in clinical practice
Authors: Bonczar Michał , Ostrowski Patryk , Bednarz Wojciech , Wojciechowski Wadim , Walocha Jerzy , Koziej Mateusz 
Published: February 2023

Abstract
Purpose
The synovial plica of the elbow is a fold of synovial tissue, which is said to be a remnant of the embryonic septa of normal articular development and is located around the radiocapitellar joint. The objective of the present study was to provide morphometric properties of the synovial plica of the elbow and its relation to surrounding structures in asymptomatic patients.

Methods
A retrospective study was conducted to establish the morphometric characteristics of the synovial plica of the elbow. The results of 216 consecutive patients, who for different reasons during the five year period of time underwent magnetic resonance imaging (MRI) of an elbow, were analyzed.

Results
Plica was found in a total of 161 of 216 elbows (74.5%). The mean width of the plica was set to be 3.00 mm (SD: 1.39). The mean length of the plica was established at 2.91 mm (SD: 1.13). An analysis of sexual dimorphism was also included. Potential correlations were analyzed for each of the categories and age.

Conclusions
The synovial plica of the elbow is a clinically relevant anatomical structure. Analyzing the morphometric parameters of the synovial plica is necessary to properly evaluate synovial plica syndrome, which can commonly be confused with other sources of lateral elbow pain such as tennis elbow, oppression of the radial and/or posterior interosseous nerve, or snapping of the triceps tendon. The authors suggest that the thickness of the plica may not be the golden diagnostic feature as there are no statistically significant differences in this parameter between symptomatic and asymptomatic patients. A precise and accurate diagnosis of synovial fold syndrome and/or differentiation from other sources of lateral elbow pain must be performed, as the surgical treatment, even if performed properly, will be unsuccessful because of a misdiagnosed source of pain.