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result(s) for
"Dual Pathways"
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Supercritical CO2 Activation Enables an Exceptional Methanol Synthesis Activity Over the Industrial Cu/ZnO/Al2O3 Catalyst
by
Liu, Ruijie
,
Wang, Jianfang
,
Zhou, Yannan
in
Atmospheric pressure
,
dual‐response pathway
,
Gases
2025
The ternary Cu/ZnO/Al2O3 catalyst is widely used in the industry for renewable methanol synthesis. The tenuous trade‐off between the strong metal–support interaction (SMSI)‐induced Cu–ZnOx interface and the accessible Cu surface strongly affects the activity of the final catalyst. Successes in the control of oxide migration on adsorbate‐induced SMSI catalysts have motivated this to develop a supercritical CO2 activation strategy to synchronously perfect the Cu0–O–Znδ+ interface and Cu0–Cu+ surface sites through the manipulation of the adsorbate diffusion kinetics, which involves *OC2H5 and “side‐on” fixed CO2 species. This findings illustrate that the adsorbate on ZnOx can facilitate its secondary uniform nucleation and induce a ZnxAl2Oy spinel phase and that CO2 adsorption on metallic Cu0 produces an activated CuxO amorphous shell. Such a structural evolution unlocks a dual‐response pathway in methanol synthesis, thus enabling Cu/ZnO/Al2O3 with a twofold increase in catalytic activity. This atomic‐level design of active sites and understanding of supercritical CO2‐induced structural evolution will guide the future development of high‐performance supported metal catalysts. A supercritical CO2 activation strategy is demonstrated for the ternary industrial Cu/ZnO/Al2O3 catalyst to synchronously perfect the strong metal–support interaction‐induced Cu–ZnOx interfacial and exposed Cu surface sites by manipulating the adsorbent diffusion kinetics. A dual‐response pathway in methanol synthesis is unraveled. It endows the ternary catalyst with a remarkable two‐fold increase in the catalytic activity.
Journal Article
Hierarchical cortical networks of “voice patches” for processing voices in human brain
2021
Humans have an extraordinary ability to recognize and differentiate voices. It is yet unclear whether voices are uniquely processed in the human brain. To explore the underlying neural mechanisms of voice processing, we recorded electrocorticographic signals from intracranial electrodes in epilepsy patients while they listened to six different categories of voice and nonvoice sounds. Subregions in the temporal lobe exhibited preferences for distinct voice stimuli, which were defined as “voice patches.” Latency analyses suggested a dual hierarchical organization of the voice patches. We also found that voice patches were functionally connected under both task-engaged and resting states. Furthermore, the left motor areas were coactivated and correlated with the temporal voice patches during the sound-listening task. Taken together, this work reveals hierarchical cortical networks in the human brain for processing human voices.
Journal Article
Correlations between Dual-Pathway White Matter Alterations and Language Impairment in Patients with Aphasia: A Systematic Review and Meta-analysis
2021
Abstract While converging evidence suggests linguistic roles of white matter tracts, detailed associations between white matter alterations of dual pathways and language abilities remain unknown in aphasic patients. We aimed to verify language functions of dual-pathway tracts from specific domains and investigate the influence of moderators. PubMed, Web of Science, Embase, and CENTRAL were searched for studies published between January 1, 1985 and March 17, 2019. A meta-analysis of 46 studies including 1353 aphasic patients was performed by pooling correlation coefficients between linguistic domains and diffusion metrics of dual-pathway tracts. Among these tracts, the fractional anisotropy (FA) value of the left inferior fronto-occipital fasciculus predominated across most linguistic aspects, showing the strongest correlations with global severity, comprehension, naming and reading ability. The left uncinate fasciculus and inferior longitudinal fasciculus also showed significant FA − comprehension correlations. For syntactic processing, FA values of the left superior longitudinal fasciculus and arcuate fasciculus showed significant positive correlations. Meta-regression revealed no influence of etiology on FA − language correlations, while sex had a moderating effect on the FA − comprehension correlation of the arcuate fasciculus, and age influenced the FA − naming correlation in the superior longitudinal fasciculus. In conclusion, multifunctional characteristics of tracts were revealed in aphasic patients, including broad linguistic associations of the inferior fronto-occipital fasciculus, and repetition and syntactic involvement of the arcuate fasciculus. Language associations of the inferior longitudinal fasciculus and uncinate fasciculus were clarified regarding comprehension subdomains. The insignificant moderating effect of the etiology indicates damage of dual pathways is the common neural mechanism, while sex and age influence the correlation with comprehension and naming ability, respectively, in specific tracts.
Journal Article
Distinct parallel activation and interaction between dorsal and ventral pathways during phonological and semantic processing: A cTBS‐fMRI study
2024
Successful visual word recognition requires the integration of phonological and semantic information, which is supported by the dorsal and ventral pathways in the brain. However, the functional specialization or interaction of these pathways during phonological and semantic processing remains unclear. Previous research has been limited by its dependence on correlational functional magnetic resonance imaging (fMRI) results or causal validation using patient populations, which are susceptible to confounds such as plasticity and lesion characteristics. To address this, the present study employed continuous theta‐burst stimulation combined with fMRI in a within‐subject design to assess rapid adaptation in regional activity and functional connectivity of the dorsal and ventral pathways during phonological and semantic tasks. This assessment followed the precise inhibition of the left inferior parietal lobule and anterior temporal lobe in the dorsal and ventral pathways, respectively. Our results reveal that both the dorsal and ventral pathways were activated during phonological and semantic processing, while the adaptation activation and interactive network were modulated by the task type and inhibited region. The two pathways exhibited interconnectivity in phonological processing, and disruption of either pathway led to rapid adaptation across both pathways. In contrast, only the ventral pathway exhibited connectivity in semantic processing, and disruption of this pathway alone resulted in adaptive effects primarily in the ventral pathway. These findings provide essential evidence supporting the interactive theory, phonological information processing in particular, potentially providing meaningful implications for clinical populations. Our continuous theta‐burst stimulation (cTBS)‐functional magnetic resonance imaging study comprehensively elucidated the functional specificity and interaction of dorsal and ventral pathways during phonological and semantic processing. cTBS was applied to the left inferior parietal lobule (dorsal), anterior temporal lobe (ventral), and sham (baseline). Both dual pathways activated during phonological and semantic processing but exhibited distinct interactions.
Journal Article
Long-term Antithrombotic Therapy in Patients With Chronic Coronary Syndrome: An Updated Review of Current Evidence
by
Esposito, Giovanni
,
Cannon, Christopher P.
,
Hess, Connie N.
in
Acute coronary syndromes
,
Antiplatelet therapy
,
Aspirin
2025
Despite improvements in the secondary prevention of atherothrombosis in patients with coronary artery disease during the past decade, it is estimated that approximately 19 million people annually die from cardiovascular diseases worldwide. Atherothrombosis remains the core pathobiology of acute complications including myocardial infarction (MI), and therefore, antithrombotic therapy plays a pivotal role in the strategies for major adverse cardiovascular event (MACE) prevention. Unlike early antithrombotic management after acute coronary syndrome, less evidence is available on long-term antithrombotic therapy in patients with chronic coronary syndrome (CCS). In addition, greater recognition of the impact of bleeding complications of such therapies has led to a more complex and personalized approach to their application. The purpose of this article is to review the available evidence on long-term antithrombotic therapy in patients with CCS including those with high-risk characteristics such as prior MI or polyvascular disease.
A comprehensive literature review was performed in major databases including PubMed, Embase, and the Cochrane Library. The main focus of this narrative review was on available data from guidelines, meta-analysis, randomized controlled trials, and observational studies that assessed the efficacy and safety profile of long-term antithrombotic therapy in patients with CCS.
Several studies suggest that long-term antithrombotic therapy is effective in reducing the risk of recurrent MACEs in patients with CCS. Current clinical guidelines recommend single antiplatelet therapy with aspirin as a first-line long-term strategy for patients without indication for oral anticoagulation. However, novel approaches focused on P2Y12 inhibitor monotherapy are emerging. More intensive antithrombotic strategies including long-term dual antiplatelet therapy and dual pathway inhibition further reduce ischemic risk but at the cost of increased bleeding.
This review highlights the importance of close monitoring and regular reassessment of the risk-benefit balance of antithrombotic therapy in patients with CCS. Overall, long-term antithrombotic therapy with either single antiplatelet therapy or dual antiplatelet therapy/dual pathway inhibition is effective in reducing the risk of MACEs in patients with CCS. The choice of antithrombotic therapy should be individualized based on the patient's clinical profile, particularly for thrombohemorrhagic risk. Future research should focus on identifying the optimal antithrombotic regimen for specific subgroups of patients with prior MI particularly for those with high bleeding risk.
Journal Article
Threat-related corticocortical connectivity elicited by rapid auditory looms
by
Deco, Gustavo
,
Tóth, Brigitta
,
Ignatiadis, Karolina
in
631/378/116/1925
,
631/378/2649/1723
,
Acoustic Stimulation
2025
While sounds of approaching objects are generally more salient than those of receding ones, the traditional association of this auditory looming bias with threat perception is subject to debate. Differences between looming and receding sounds may also be learned through non-threatening multisensory information or influenced by confounding stimulus characteristics. To investigate, we analyzed corticocortical connectivity patterns from electroencephalography, examining the preferential processing of looming sounds under different attentional states. To simulate rapid distance changes, we used complementary distance cues, previously studied in the looming bias literature. We observed crucial involvement of frontal cortical regions typically associated with threat and fear responses. Our findings suggest an underlying bias within the ventral ’what’ stream rather than within the dorsal ’where’ stream in auditory information processing, even when the participants’ task was solely focused on the discrimination of movement direction. These results support the idea, that the perceptual bias towards looming sounds reflects an auditory threat detection mechanism, while offering insights into the neural function involved in processing ecologically relevant environmental cues.
Journal Article
Activation pattern within Koch’s triangle during sinus rhythm in patients with and without atrioventricular nodal reentrant tachycardia
2024
Background
Several studies have visualized the slow pathway during sinus rhythm using high-density mapping of Koch’s triangle (KT) in patients with atrioventricular nodal reentrant tachycardia (AVNRT). However, it is unclear whether the slow pathway can be visualized in all people. Therefore, we evaluated the activation pattern within KT during sinus rhythm in patients with and without AVNRT.
Methods
High-density mapping using the Advisor HD Grid mapping catheter (Abbott) within KT during sinus rhythm was created in 10 patients with slow-fast AVNRT and 30 patients without AVNRT.
Results
In 8 (80%) patients with AVNRT, the activation pattern pivoting around a block line (BL) within KT was observed. In 12 (40%) patients without AVNRT, similar activation pattern pivoting around BL was observed, but jump was observed in 11 (92%) of these patients. In all patients, the activation pattern pivoting around BL was observed in 17 (85%) of 20 patients with jump, but only 3 (15%) of 20 patients without jump (
p
< 0.0001). During jump, there was a long period of no potential from the last atrial potential within KT to the His bundle potential, suggesting the slow pathway conduction through the rightward inferior extension that cannot be visualized. A linear ablation between the pivot point and the septal tricuspid annulus was successful for slow-fast AVNRT.
Conclusion
Although the slow pathway could not be visualized using high-density mapping during sinus rhythm, the activation pattern pivoting around BL within KT was observed in most patients with the dual pathway physiology, with or without AVNRT.
Journal Article
Sun exposure and skin cancer, and the puzzle of cutaneous melanoma: A perspective on Fears et al. Mathematical models of age and ultraviolet effects on the incidence of skin cancer among whites in the United States. American Journal of Epidemiology 1977; 105: 420-427
by
Armstrong, Bruce K
,
Cust, Anne E
in
Age Factors
,
Carcinoma, Basal Cell - epidemiology
,
Carcinoma, Squamous Cell - epidemiology
2017
Sunlight has been known as an important cause of skin cancer since around the turn of the 20th Century. A 1977 landmark paper of US scientists Fears, Scotto, and Schneiderman advanced a novel hypothesis whereby cutaneous melanoma was primarily caused by intermittent sun exposure (i.e. periodic, brief episodes of exposure to high-intensity ultraviolet radiation) while the keratinocyte cancers, squamous cell carcinoma and basal cell carcinoma, were primarily caused by progressive accumulation of sun exposure. With respect to cutaneous melanoma, this became known as the intermittent exposure hypothesis. The hypothesis stemmed from analysis of measured ambient ultraviolet radiation and age-specific incidence rates of melanoma and keratinocyte cancers collected as an extension to the US Third National Cancer Survey in several US States. In this perspective paper, we put this novel hypothesis into the context of knowledge at the time, and describe subsequent epidemiological and molecular research into melanoma that elaborated the intermittent exposure hypothesis and ultimately replaced it with a dual pathway hypothesis. Our present understanding is of two distinct biological pathways by which cutaneous melanoma might develop; a nevus prone pathway initiated by early sun exposure and promoted by intermittent sun exposure or possibly host factors; and a chronic sun exposure pathway in sun sensitive people who progressively accumulate sun exposure to the sites of future melanomas.
Journal Article
Attenuated alpha–gamma coupling in emotional dual pathways with right‐Amygdala predicting ineffective antidepressant response
by
Yao, Zhijian
,
Dai, Zhongpeng
,
Zhang, Siqi
in
alpha–gamma coupling
,
Amygdala
,
antidepressant response
2022
Aims The diversity of treatment outcomes for major depressive disorder (MDD) remains uncertain in neuropathology. The current study aimed at exploring electrophysiological biomarkers associated with treatment response. Methods The present study recruited 130 subjects including 100 MDD patients and 30 healthy controls. All subjects participated in a sad expression recognition task while their magnetoencephalography data were recorded. Patients who had a reduction of at least 50% in disorder severity at endpoint (>2 weeks) were considered as responders. Within‐frequency power and phase‐amplitude coupling were measured for the brain regions involved in the emotional visual information processing pathways. Results The significant alpha–gamma decoupling from the right thalamus to the right amygdala in unconscious processing and from right orbital frontal cortices to the right amygdala in conscious processing was found in non‐responders relative to responders and healthy controls. These kinds of dysregulation could also predict the potential treatment response. Conclusion The attenuated alpha–gamma coupling in dual pathways indicated increased sensitivity to the negative emotional information and reduced moderated effect of the amygdala, which might cause insensitivity to antidepressant treatment and could be regarded as potential neural mechanisms for treatment response prediction. The attenuated alpha‐gamma interactions in both awareness and unawareness paths associated with antidepressant response. Specifically, these aberrant frequency interactions mainly involved brain regions in emotional dual model, like right amygdala, right thalamus, right orbital frontal cortices. The disrupted oscillatory activity could be utilized to predict treatment response at baseline.
Journal Article