Structural Evidence Research Articles

TESS Stellar Rotation up to 80 Days in the Southern Continuous Viewing Zone

The Transiting Exoplanet Survey Satellite (TESS) mission delivers time-series photometry for millions of stars across the sky, offering a probe into stellar astrophysics, including rotation, on a population scale. However, light-curve systematics related to the satellite’s 13.7 day orbit have prevented stellar rotation searches for periods longer than 13 days, putting the majority of stars beyond reach. Machine-learning methods have the ability to identify systematics and recover robust signals, enabling us to recover rotation periods up to 35 days for GK dwarfs and 80 days for M dwarfs. We present a catalog of 7245 rotation periods for cool dwarfs in the Southern Continuous Viewing Zone, estimated using convolutional neural networks. We find evidence for structure in the period distribution consistent with prior Kepler and K2 results, including a gap in 10–20 day cool-star periods thought to arise from a change in stellar spin-down or activity. Using a combination of spectroscopic and gyrochronologic constraints, we fit stellar evolution models to estimate masses and ages for stars with rotation periods. We find strong correlations between the detectability of rotation in TESS and the effective temperature, age, and metallicity of the stars. Finally, we investigate the relationships between rotation and newly obtained spot filling fractions estimated from Apache Point Observatory Galactic Evolution Experiment spectra. Field starspot filling fractions are elevated in the same temperature and period regime where open clusters’ magnetic braking stalls, lending support to an internal shear mechanism that can produce both phenomena.

The Vaca Muerta mesosiderite: The path under which Fe‐Ni alloy ±C phases could have formed

AbstractThe combined SEM and TEM studies on the metal (Fe‐Ni alloy ±C) portion of the Vaca Muerta mesosiderite reveal structural and compositional evidence at micro to nanoscale, which sheds light on the solidification of taenite + graphite as a cement, and later solid‐state precipitation process for the kamacite formation as grain boundary allotriomorph. Besides, it is proposed that the graphite veinlets formed through a complex partial melting process followed by a solidification toward the final eutectic transient coupled with the solid‐state precipitation and later decomposition ordering of taenite. The presence of defects and taenite in graphite signal formation in a liquid environment. The δ13C values of graphite in the graphite‐rich areas (e.g., ranging from −0.8 ± 1.7‰ to +15.3 ± 2.5‰) suggest a short‐circuit diffusion path for C isotope fractionation.

Promoting Longitudinal and Developmental Computer-Based Assessments of Clinical Reasoning: Validity Evidence for a Clinical Reasoning Mapping Exercise.

Clinical reasoning is vitally important for practitioners across the health professions. However, the assessment of clinical reasoning remains a significant challenge. Combined with other assessment methods, non-workplace-based assessment can increase opportunities to address multiple components of clinical reasoning, evaluate growth, and foster learning, but tools with validity evidence to assess clinical reasoning outside the workplace are scare. This study examined validity evidence for a novel clinical reasoning mapping exercise (CResME). Data include CResME performance scores from 120 third-year medical students at the University of Central Florida for 3 topics in May 2022. Each CResME was scored by 2 physician raters based on a scoring rubric that included a combined diagnosis and sequence score. Descriptive statistics were used to examine trends in scores. The authors gathered validity evidence for response process, internal structure, and relations to other variables. The overall mean (SD) score across cases was 66 (29). Internal consistency reliability of cases (Cronbach α) ranged from 0.75 to 0.91. The Phi and G coefficients were 0.45 and 0.56, respectively. Students accounted for 10% of the total variance, indicating the ability to differentiate high and low clinical reasoning skills; the interaction between learner and case accounted for 8.1% of the variance, demonstrating case specificity. There was a moderate correlation between the overall CResME scores and the mean overall score of patient encounter notes from an objective structured clinical examination performed at the end of the third year (0.46; P = .001). Significant associations were also found between the CResME scores and subject exam scores. The CResME can be used to facilitate the assessment of clinical reasoning, supporting the developmental progress of learners throughout the curriculum. Future research is needed to gather validity evidence for CResMEs with different learners across different settings and formats.

Genetic diversity and inbreeding in an endangered island-dwelling parrot population following repeated population bottlenecks

Genetic diversity and population structure can have important implications for the management of threatened species. This is particularly true for small, isolated populations that have experienced significant declines or population bottlenecks. The Norfolk Island green parrot Cyanoramphus cookii is an endangered species at risk of inbreeding and loss of genetic diversity due to its restricted range and the population bottlenecks experienced in recent decades. To assess the severity of inbreeding and loss of genetic diversity in the population we analyzed single nucleotide polymorphisms (SNPs) for 157 unique genetic samples collected from nestlings and randomly captured adult birds between 2015 and 2022. We also assessed the population for genetic structure, calculated sex ratios, and looked for evidence of past population bottlenecks. Our analysis revealed that 17.83% of individuals sampled were highly inbred (F > 0.125), although expected heterozygosity (HE) did not significantly differ from observed heterozygosity (HO) and the average inbreeding coefficient was low. The estimated effective population size (Ne) was 43.8 and we found no evidence of genetic structure. Demographic simulations provided support for scenarios including multiple population bottlenecks, when compared to those with a single population bottleneck or no past bottlenecks. We discuss the implications of our findings for the future management of the species including any potential attempt to establish an insurance population via translocation. Our study highlights the importance of considering population genetics when determining appropriate management actions for threatened species and the need to assess non-model species on an individual basis.

On an apparent dearth of recurrent nova super-remnants in the Local Group

ABSTRACT The Andromeda Galaxy is home to the annually erupting recurrent nova (RN) M 31N 2008-12a (12a); the first nova found to host a nova super-remnant (NSR). An NSR is an immense structure surrounding a RN, created from many millions of eruptions sweeping up material in the local environment to form a shell tens of parsecs across. Theory has demonstrated that NSRs should be found around all recurrent novae (RNe), even those systems with long periods between eruptions. Befittingly, the second NSR was found around the Galactic classical (and long suspected recurrent) nova, KT Eridani. In this Paper, we aim to find more of these phenomena through conducting the first ever survey for NSRs in M 31 and the Large Magellanic Cloud (LMC). We find that the surroundings of fourteen RNe in M 31 as well as the surroundings of the four RNe in the LMC do not show any evidence of vast parsec-scale structures in narrow-band (H α and $[{\rm S\, {\small II}}]$) images, unlike the one clearly seen around 12a, and therefore conclude that observable NSRs are either rare structures, or they are too faint (or small) to be detected in our existing data sets. Yet, the NSR surrounding 12a would also likely to have been overlooked in our study if it were approximately one magnitude fainter. Searches for NSRs around other RNe ‘masquerading’ as classical novae may prove to be fruitful as would whole surveys of other Local Group galaxies.

Preliminary evidence for the validity of the Brief Post-Secondary Student Stressors Index (Brief-PSSI): A cross-sectional psychometric assessment.

The brief version of the Post-Secondary Student Stressors Index (Brief-PSSI) was developed in order to improve the usability of the instrument as a method for evaluating the severity and frequency of stressors faced by post-secondary students. While the original 46-item instrument has been thoroughly psychometrically validated and successfully used among student populations, the length of the instrument limits its utility. Providing a valid, shortened version of the PSSI will enable institutions to include the tool on existing online surveys currently being deployed to surveil the mental health and wellbeing of their students. This study reports preliminary evidence in support of the validity and reliability of the Brief-PSSI using a cross-sectional pilot sample of students attending an Ontario university in 2022. A total of 349 participants (average age 25 (SD = 7.7), range 19-60) completed the first survey, while 149 completed the follow-up survey (average age of 26 (SD = 7.7), range 17-60). Evidence of internal structure, relations to other variables, and of test-retest reliability was assessed according to established index validation guidelines, including the specification of multiple-indicator, multiple-cause models, and Spearman's rho correlation coefficients. Results provide preliminary support for the validity and reliability of the tool, which demonstrated acceptable goodness-of-fit statistics, statistically significant relationships with like constructs in the hypothesized directions, and good test-retest reliability correlation coefficients. The Brief-PSSI is a useful tool for evaluating the sources of stress among post-secondary students, assessing both the severity of stress experienced and frequency with which each stressor occurred. Future research should explore the practical utility of adding the Brief-PSSI to existing survey assessments as well as pursue the continued collection of validation evidence for the tool among varied student populations.

An examination of auditor hypothesis testing strategies in ‘tone at the top’ evaluations: Evidence of diagnostic knowledge structures

This study examines the tests auditors design to assess a client's ‘tone at the top’. By exploiting conceptual differences in the constructs of ethicality and competence, the study investigates auditor knowledge structures by disentangling auditor hypothesis testing strategies. The results of an experiment document that auditors design tests to yield evidence of unethical and competent, rather than ethical and incompetent, client management behaviour. This overall pattern of results, and in particular auditors' focus on seeking evidence of client management competence, is consistent with a diagnostic hypothesis testing strategy and is not consistent with a conservative testing strategy. Collectively, these results provide insights into how auditors' ‘tone at the top’ knowledge is organized and used.

Cocrystallization-driven Formation of fcc-based Ag110 Nanocluster with Chinese Triple Luban Lock Shape.

Luban locks with mortise and tenon structure have structural diversity and architectural stability, and it is extremely challenging to synthesize Luban lock-like structures at the molecular level. In this work, we report the cocrystallization of two structurally related atom-precise fcc silver nanoclusters Ag110 (SPhF)48 (PPh3 )12 (Ag110 ) and Ag14 (μ6 -S)(SPhF)12 (PPh3 )8 (Ag14 ). It is worth noting that the Ag110 cluster is the first compound to simulate the complex Luban lock structure at the molecular level. Meanwhile, Ag110 is the largest known fcc-based silver nanocluster, so far, there is no precedent for fcc silver nanocluster with more than 100 silver atoms. DFT calculations show that Ag110 is a 58-electron superatom with an electronically closed shell1S2 1P6 1D10 2S2 1F14 2P6 1G18 . Ag110 ⋅Ag14 can rapidly catalyze the reduction of 4-nitrophenol within 4 minutes. In addition, Ag110 presents clear structural evidence to reveal the critical size and mechanism of the transformation of metal core from fcc stacking to quasi-spherical superatom. This research work provides an important structural model for studying the nucleation mechanism and structural assembly of silver nanoclusters.

Cocrystallization‐driven Formation of fcc‐based Ag110Nanocluster with Chinese Triple Luban Lock Shape

AbstractLuban locks with mortise and tenon structure have structural diversity and architectural stability, and it is extremely challenging to synthesize Luban lock‐like structures at the molecular level. In this work, we report the cocrystallization of two structurally related atom‐precise fcc silver nanoclusters Ag110(SPhF)48(PPh3)12(Ag110) and Ag14(μ6‐S)(SPhF)12(PPh3)8(Ag14). It is worth noting that theAg110cluster is the first compound to simulate the complex Luban lock structure at the molecular level. Meanwhile,Ag110is the largest known fcc‐based silver nanocluster, so far, there is no precedent for fcc silver nanocluster with more than 100 silver atoms. DFT calculations show thatAg110is a 58‐electron superatom with an electronically closed shell1S21P61D102S21F142P61G18.Ag110⋅Ag14can rapidly catalyze the reduction of 4‐nitrophenol within 4 minutes. In addition,Ag110presents clear structural evidence to reveal the critical size and mechanism of the transformation of metal core from fcc stacking to quasi‐spherical superatom. This research work provides an important structural model for studying the nucleation mechanism and structural assembly of silver nanoclusters.

Effect of banks’ ownership structure on financial performance: evidence from banks in an emerging market

PurposeThis study aims to examine the effect of ownership structure on financial performance of commercial banks in Kenya.Design/methodology/approachThe data were collected from audited financial statements of 39 commercial banks in Kenya for the period 2009–2020.FindingsRegression results found evidence of ownership structure explaining commercial banks’ financial performance. The results found a negative association between state ownership and net interest margin, a negative association between management ownership and net interest margin and a negative association between institutional ownership and return on assets.Practical implicationsBased on the findings, commercial bank management should therefore devise ownership structure policies that are geared toward boosting their financial performance both in the short run and the long run. Second, this study recommends a minority shareholding of the state in commercial banks to deter political interference, protect investors’ wealth from erosion and allow the majority shareholders to adopt a strong corporate governance mechanism for higher financial performance. Banks with a high percentage of state ownership should consider partial privatization to improve corporate governance practices. Third, banks should adopt a managerial ownership policy limiting the proportion of equity stock held by executives to limit their powers in strategic decision-making. Fourth, this study proposes a percentage limit on the equity stock of an institutional investor to eliminate bureaucracy in strategic decision-making and protect investors’ wealth.Originality/valueThe study finding is meant to inform regulation and operation policies in the banking sector and contribute to the literature on ownership structure, especially in the banking sector.

Lack of population structure in an important fishery species of mud shrimp, Trypaea australiensis

AbstractFrom a conservation standpoint, species that are managed without consideration of their population sizes and connectivity have the potential to be over‐exploited and/or incur population decline. The burrowing shrimp, Trypaea australiensis, is an important ecosystem engineer and fishery resource caught in large numbers for which population information is unknown for properly managing the species. Here, we determined the level of population structure of T. australiensis across three locations along the East Coast of New South Wales, Australia, using genome‐wide single nucleotide polymorphisms (SNPs) obtained through double digest Restriction‐site Associated DNA‐sequencing (ddRAD‐seq). Analysis of population structure, including pairwise Fst (−0.003 to −0.001), STRUCTURE (K = 2) and Discriminant Analysis of Principal Components (DAPC) showed no evidence of structure among locations. Our findings provide crucial preliminary population genetic data for a key cryptic species, that also suggests gene flow among sampling locations enables the management of fisheries throughout the study area as a single unit.

Translation, cross-cultural adaptation and validation of the Arabic multimorbidity treatment burden questionnaire (MTBQ-A): A study of adults with multimorbidity

BackgroundStudies internationally have found that a high treatment burden is associated with several long-term conditions and poor quality of life. ObjectivesTo translate, culturally adapt, and provide evidence of reliability, validity, and factor structure of the Multimorbidity Treatment Burden Questionnaire for use among Arabic-speaking adults with multimorbidity. MethodsStandard guidelines for the cross-cultural adaptation of self-report measures were followed. The original 10-item MTBQ was translated into Arabic by professional translators using forward-backward translation. An expert group, including the creator of the MTBQ, participated in the cultural adaptation and content validity, followed by cognitive interviewing and pilot testing. The questionnaire was then tested on 177 Arabic-speaking patients with multimorbidity recruited from community pharmacies in the United Arab Emirates. The distribution of responses, dimensionality, internal consistency reliability, and construct validity were examined. ResultsThe content validity of the MTBQ-A was good (Content Validity Index = 0.94), and cognitive interviews found that the items were well understood. The scale showed positive skewness and high floor effects. Factor analysis supported a two-dimensional structure (factor loadings >0.4): factor one was named “Self-management and social support,” and factor two was named “Burden of visiting health care services and health care professionals”. The questionnaire had good internal consistency (α = 0.83). As predicted, a higher MTBQ score in both factors was associated with poor health-related quality of life in all dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression (p values < 0.05); and negatively correlated with self-efficacy in taking medication (p < 0.01) and in learning about medication (p < 0.01). ConclusionsThe Arabic MTBQ is a valid and reliable measure of treatment burden with good construct validity and internal consistency. This easy-to-understand questionnaire can be used to assess the perceived treatment burden among Arabic-speaking patients with multimorbidity.

Multidisciplinary estimates of connectivity and population structure suggest the use of multiple units for the conservation and management of meagre, Argyrosomus regius

Information on population structure and connectivity of targeted species is key for proper implementation of spatial conservation measures. We used a combination of genomics, biophysical modelling, and biotelemetry to infer the population structure and connectivity of Atlantic meagre, an important fisheries resource throughout its distribution. Genetic samples from previously identified Atlantic spawning locations (Gironde, Tejo, Guadalquivir, Banc d’Arguin) and two additional regions (Algarve and Senegal) were analysed using genome-wide SNP-genotyping and mitochondrial DNA analyses. Biophysical models were conducted to investigate larval dispersal and connectivity from the known Atlantic spawning locations. Additionally, thirteen fish were double-tagged with biotelemetry transmitters off the Algarve (Portugal) to assess movement patterns and connectivity of adult individuals. This multidisciplinary approach provided a robust overview of meagre population structure and connectivity in the Atlantic. Nuclear SNP-genotyping showed a clear differentiation between the European and African populations, with significant isolation of the few known Atlantic spawning sites. The limited level of connectivity between these subpopulations is potentially driven by adults, capable of wide-ranging movements and connecting sites 500 km apart, as evidenced by tagging studies, whilst larval dispersal inferred by modelling is much more limited (average of 52 km; 95% of connectivity events up to 174 km). Our results show sufficient evidence of population structure, particularly between Africa and Europe but also within Europe, for the meagre to be managed as separate stocks. Additionally, considering the low degree of larvae connectivity, the implementation of marine protected areas in key spawning sites could be crucial towards species sustainability.

How the immune mousetrap works: Structural evidence for the immunomodulatory action of a peptide from influenza NS1 protein

One of the critical stages of the T-cell immune response is the dimerization of the intramembrane domains of T-cell receptors (TCR). Structural similarities between the immunosuppressive domains of viral proteins and the transmembrane domains of TCR have led several authors to hypothesize the mechanism of immune response suppression by highly pathogenic viruses: viral proteins embed themselves in the membrane and act on the intramembrane domain of the TCRalpha subunit, hindering its functional oligomerization. It has also been suggested that this mechanism is used by influenza A virus in NS1-mediated immunosuppression. We have shown that the peptide corresponding to the primary structure of the potential immunosuppressive domain of NS1 protein (G51) can reduce concanavalin A-induced proliferation of PBMC cells, as well as in vitro, G51 can affect the oligomerization of the core peptide corresponding to the intramembrane domain of TCR, using AFM and small-angle neutron scattering.The results obtained using in cellulo and in vitro model systems suggest the presence of functional interaction between the NS1 fragment and the intramembrane domain of the TCR alpha subunit. We have proposed a possible scheme for such interaction obtained by computer modeling.This suggests the existence of another NS1-mediated mechanism of immunosuppression in influenza.

Practical Considerations for Oncogenic Fusion Detection and Reporting in Solid Tumors.

Chromosomal rearrangements that result in oncogenic fusions can hold tremendous clinical significance in solid tumors, often with diagnostic or treatment implications. Traditionally, low-throughput methods such as fluorescence in situ hybridization were used to identify fusions in the clinical laboratory. With the rise of next-generation sequencing techniques and the broad adoption of comprehensive genomic profiling, the practice of screening for fusions as part of an oncologic workup has evolved. RNA sequencing methods are increasingly used, as these comprehensive high-throughput assays have many advantages over traditional techniques. Several RNA sequencing platforms are available, each with benefits and drawbacks. Regardless of the approach, systematic evaluation of the RNA sequencing results and the fusions identified by the assay should be performed. Assessment of fusion events relies upon evaluation of quality evidence, structural evidence, and functional evidence to ensure accurate fusion reporting and interpretation. Given the clinical significance of gene fusions in oncology, understanding the variety of assays available for fusion detection, their benefits and drawbacks, and how they are used in the identification and interpretation of gene fusions is important for the modern precision oncology practice.

Cell death induced by nicotine in human neuroblastoma SH-SY5Y cells is mainly attributed to cytoplasmic vacuolation originating from the trans-Golgi network

Humans are usually exposed to nicotine through the use of tobacco products. Although it is generally believed that nicotine is relatively harmless in tobacco consumption, it is, in fact, a toxic substance that warrants careful consideration of its potential toxicity. However, the current understanding of the neurotoxicity of nicotine is still very limited. In this study, we aim to reveal the toxic risk of nicotine to key target neuronal cells and its potential toxic mechanisms. The results showed that nicotine induced cell death, ROS increase, mitochondrial membrane potential decrease, and DNA damage in SH-SY5Y human neuroblastoma cells at millimolar concentrations, but did not cause toxic effects at the physiological concentration. These toxic effects were accompanied by cytoplasmic vacuolation. The inhibition of cytoplasmic vacuolation by bafilomycin A1 greatly reduced nicotine-induced cell death, indicating that cytoplasmic vacuolation is the key driving factor of cell death. These cytoplasmic vacuoles originated from the trans-Golgi network (TGN) and expressed microtubule-associated protein 1 light chain 3-II (LC3-II) and lysosomal associated membrane protein 1(LAMP1). The presence of LC3-II and LAMP1 within these vacuoles serves as evidence of compromised TGN structure and function. These findings provide valuable new insights into the potential neurotoxic risk and mechanisms of nicotine.

Evidence of validity of the Risk Self-Medication Questionnaire focused on Health Literacy.

to analyze the validity evidence of the internal structure of the Risk Self-Medication Questionnaire Focused on Health Literacy. a psychometric study with 499 adults. The internal structure was assessed with exploratory and confirmatory factor analysis to prove the adjustment. Internal consistency was measured by composite reliability and McDonald's omega coefficient (ω). the parameters revealed a model of 35 items distributed across four factors, explaining 56% of the total variance, with factor loadings ranging from 0.31 to 0.85 and adequate communalities. Accuracy (0.79<ORION<0.98), representativeness (0.89<FDI<0.99), sensitivity (1.92<SR<7.07), factor hope (88.3%< EPTD<97.9%), replicability (0.82<H-Latent<H-observed<0.87) and reliability (ω=0.87) were adequate. The composite reliability ranged from 0.840 to 0.910. Furthermore, good model fit was achieved (TLI = 0.99; CFI = 0.99; GFI = 0.95; RMSEA = 0.02 and RMSR = 0.05). an instrument was obtained with good evidence of structural validity for measuring self-medication.

Aceso-DSAL: Discovering Clinical Evidences from Medical Literature Based on Distant Supervision and Active Learning.

Automatic extraction of valuable, structured evidence from the exponentially growing clinical trial literature can help physicians practice evidence-based medicine quickly and accurately. However, current research on evidence extraction has been limited by the lack of generalization ability on various clinical topics and the high cost of manual annotation. In this work, we address these challenges by constructing a PICO-based evidence dataset PICO-DS, covering five clinical topics. This dataset was automatically labeled by a distant supervision based on our proposed textual similarity algorithm called ROUGE-Hybrid. We then present an Aceso-DSAL model, an extension of our previous supervised evidence extraction model - Aceso. In Aceso-DSAL, distantly-labelled and multi-topic PICO-DS was exploited as training corpus, which greatly enhances the generalization of the extraction model. To mitigate the influence of noise unavoidably-introduced in distant supervision, we employ TextCNN and MW-Net models and a paradigm of active learning to weigh the value of each sample. We evaluate the effectiveness of our model on the PICO-DS dataset and find that it outperforms state-of-the-art studies in identifying evidential sentences.

Robust vibrational coherence protected by a core-shell structure in silver nanoclusters.

Vibrational coherence has attracted considerable research interests because of its potential functions in light harvesting systems. Although positive signs of vibrational coherence in metal nanoclusters have been observed, the underlying mechanism remains to be verified. Here, we demonstrate that robust vibrational coherence with a lifetime of 1 ps can be clearly identified in Ag44(SR)30 core-shell nanoclusters, in which an icosahedral Ag12 core is well protected by a dodecahedral Ag20 cage. Ultrafast spectroscopy reveals that two vibrational modes at around 2.4 THz and 1.6 THz, corresponding to the breathing mode and quadrupolar-like mode of the icosahedral Ag12 core, respectively, are responsible for the generation of vibrational coherence. In addition, the vibrational coherence of Ag44 has an additional high frequency mode (2.4 THz) when compared with that of Ag29, in which there is only one low frequency vibration mode (1.6 THz), and the relatively faster dephasing in two-layer Ag29 relative to that in Ag44 further supports the fact that the robust vibrational coherence in Ag44 is ascribed to its unique matryoshka-like core-shell structure. Our findings not only present unambiguous experimental evidence for a multi-layer core-shell structure protected vibrational coherence under ambient conditions but also offers a practical strategy for the design of highly efficient quantum optoelectronic devices.

Copper single-site engineering in MOF-808 membranes for improved water treatment.

MOF-808, a metal-organic framework containing Zr6O8 clusters, can serve as a secure anchoring point for stabilizing copper single-sites with redox activity, thus making it a promising candidate for catalytic applications. In this study, we target the incorporation of Cu-MOF-808 into a mixed-matrix membrane for the degradation of tyrosol, an emerging endocrine-disrupting compound commonly found in water sources, through Fenton reactions, developing innovative technologies for water treatment. We successfully demonstrate the effectiveness of this approach by preparing catalytic membranes with minimal metal leaching, which is one of the primary challenges in developing copper-based Fenton heterogeneous catalysts. Furthermore, we utilized advanced synchrotron characterization techniques, combining X-ray absorption spectroscopy and pair distribution function analysis of X-ray total scattering, to provide evidence of the atomic structure of the catalytic copper sites within the membranes. Additionally, we observed the presence of weak interactions between the MOF-808 and the organic polymer, potentially explaining their enhanced stability.