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Neutrophil-activating protein in Bacillus spores inhibits casein allergy via TLR2 sig...
zhenwen zhou
Zhuwei Liang

zhenwen zhou

and 12 more

October 30, 2023
Background: Milk allergy commonly occurs in children, mainly caused by casein (CAS) protein. Neutrophil-activating protein (NAP) of Helicobacter pylori plays an immunomodulatory role with potential to suppress Th2-type immune responses. Bacillus subtilis spores are commonly used as oral vectors for drug delivery. We hypothesized that recombinantly expressed NAP on B. subtilis spores could be an effective treatment for CAS allergy. Methods: After CAS sensitization, mice were orally administered B. subtilis spores expressing recombinant NAP for 6 weeks. Allergic symptoms and parameters were evaluated after CAS challenge via gavage, including allergic inflammation, splenic cytokines, and serum-specific antibodies. Protein levels of Toll-like receptor 2 (TLR2) and c-JUN in the jejunum tissue were measured by western blot. Bone marrow-derived macrophages (BMDMs) were stimulated with inactivated NAP spores to measure the influence on cytokine profiles in vitro. Results: NAP recombinant spore treatment significantly reduced allergic symptoms and intestinal inflammation. Interleukin-12 and interferon-gamma levels increased, whereas serum CAS-specific IgG1 and IgE levels decreased. TLR2 and c-JUN expression levels were elevated in the jejunal tissue. Inactivated NAP spores polarized BMDMs to the M1 phenotype and enhanced cytokine expression, which were inhibited by a TLR2 neutralizing antibody. Conclusions: NAP offers a new strategy in the treatment of CAS allergy by inhibiting the Th2 response, while eliciting macrophages to activate the TLR2-dependent signaling pathway and promote Th1 immune responses.
Cancer vaccines targeting this protein could treat a variety of cancers
Catalina Garcia

Catalina Garcia

March 19, 2024
As cancer immunotherapy has advanced over the past few years, an increasing number of research teams have turned their attention to developing cancer vaccines, which are a form of active immunotherapy that works by triggering the body's defenses against cancer by exposing patients to the appropriate antigens found in tumor cells. Currently, some of the cancer vaccines that we are aware of are preventive vaccines, like the human papillomavirus (HPV) vaccine to prevent cervical cancer. However, therapeutic cancer vaccines remain the scientific community's unattainable goal in a world where cancer is still a hot topic.
Epidemiological characteristics of common respiratory viruses among children in Hangz...
Jianming Zhou
Yanhong Sun

Jianming Zhou

and 5 more

October 30, 2023
Background: Non-Pharmaceutical Interventions (NPIs) against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) not only curbed the spread of novel coronavirus (COVID-19) but also affected common respiratory viruses infected by children. The purpose of this study was to explore the effect of NPIs on common respiratory viruses in children. Methods: Samples of children diagnosed with respiratory tract infection in Children’s Hospital affiliated with Zhejiang University from January 2019 to August 2023 were collected, and ADV, Flu A, Flu B and RSV were detected. To analyze the changes in common respiratory viruses in children in three stages: pre-COVID-19, pandemic and late. Statistical analysis was carried out with R software. Results: From January 2019 to August 2023, a total of 567,858 samples were tested, including 308,163 males, accounting for 54.26%, and 259,695 females, accounting for 45.73%. Among them, there were 173,956 positive samples (30.63%), 40,279 ADV-positive samples (23.15%), 78,580 Flu A-positive samples (45.17%), 26,888 Flu B-positive samples (15.45%) and 28,209 RSV-positive samples (16.21%). Among children of different ages in Hangzhou before, during and after COVID-19, the highest total detection rate of respiratory virus was 1-3 years old (accounting for 40.24%), followed by 4-6 years old (accounting for 26.59%). The distribution in different seasons shows that the number of children infected with respiratory viruses reaches a peak in winter and spring. Compared with 2019 (35.60%) before the COVID-19 epidemic, the total detection rate of common respiratory viruses in children was lower during the COVID-19 pandemic (2020-2022) (27.89%, 22.71%, 24.63%), and it was increased in 2023 while after NPIs were cancelled (accounting for 33.75%). Conclusion: NPI measures can effectively reduce the spread of common respiratory viruses, but at the same time, they will weaken human immunity to these respiratory viruses.
Continuous Renal Replacement Therapy (CRRT) for Lithium Toxicity: An Alternative Trea...
Pooya Zardoost
Alex Prouty

Pooya Zardoost

and 5 more

October 30, 2023
Continuous Renal Replacement Therapy (CRRT) for Lithium Toxicity: An Alternative Treatment to Avoid Intradialytic Hypotension
Antarctica’s Hidden Mycoviral Treasures in Fungi Isolated from Mosses: A First Genomi...
Filipe de Carvalho Victória
Steffany Virgolino Araújo Nobre

Filipe de Carvalho Victória

and 5 more

October 30, 2023
This study investigates the presence of mycoviruses in Antarctic fungi and elucidates their evolutionary relationships. To achieve this, we aligned mycoviral gene sequences with genomes of previously sequenced Antarctic endophytic fungi, made available by our research group and accessible via JGI. Our findings reveal that the most prevalent genetic regions in all endophytic fungi are homologous to Partitiviruses. These regions display evidence of positive selection pressure, suggesting genetic diversity and the accumulation of non-synonymous mutations. This phenomenon implies a crucial role for these regions in the adaptation and survival of these fungi in the challenging Antarctic ecosystems. The presence of mycoviruses in Antarctic endophytic fungi may indicate shared survival strategies between the virus and its host, shedding light on their evolutionary dynamics. This study underscores the significance of exploring mycoviruses within endophytic fungi and their contributions to genetic diversity. Future research avenues could delve into the functional implications of these conserved mycoviral genetic regions in Antarctic endophytic fungi, providing a comprehensive understanding of this intriguing symbiotic association.
Enantiomeric and Monoaminergic Contributions to Methamphetamine's Bidirectional Effec...
Harrison Elder
David Walentiny

Harrison Elder

and 2 more

October 30, 2023
Rationale: Fentanyl remains the primary cause of fatal overdoses, and its co-use with methamphetamine (METH) is a growing concern. The optical isomers of METH, dextromethamphetamine (d-METH) and levomethamphetamine (l-METH), differ substantially in dose expression and thus may differentially contribute to the racemate’s bidirectional effects. Furthermore, it is unknown which of METH’s monoamine (MA) receptor mechanisms mediate these respiratory effects. Thus, systematic evaluation of monoamine receptor selective agents may identify treatment targets for OIRD. Methods: The two optical isomers of METH, d-METH and l-METH, were tested in adult male mice to determine their effects on basal and fentanyl-depressed minute volume (MVb; i.e., respiratory frequency x tidal volum) using whole-body plethysmography. Next, six selective agonists at MA receptors involved in METH’s activity [phenylephrine (PNE; α1), clonidine (CLON; α2), SKF-82958 (SKF; D1), quinpirole (QPR; D2), 8-OH-DPAT (8-OH; 5HT1A), and DOI (5HT2)] were singly tested on basal MVb, and then in combination with fentanyl. Results: d-METH elevated MVb and l-METH decreased MVb. Under fentanyl-depressed conditions, the bidirectional effects of racemic METH were recreated by d-METH while l-METH significantly exacerbated OIRD at 1.0 and 3.0 mg/kg. MVb was dose-dependently increased by PNE and SKF and decreased by CLON and QPR. Neither 8-OH nor DOI altered basal MVb. Under fentanyl-depressed conditions, SKF transiently elevated MVb, while PNE more persistently increased it, while DOI transiently increased MVb, and 8-OH decreased MVb. Conclusions: d-METH and l-METH differentially contribute to the bidirectional respiratory modulation observed with the racemate and selective activation of MA receptors altered basal respiration and OIRD.
Examining the relationships between body mass index, emotional eating, compulsive beh...
Mehmet Ali Paylan
Havvanur  Yoldaş İlktaç

Mehmet Ali Paylan

and 3 more

October 29, 2023
This study aimed to test the relationships between body mass index, emotional eating, compulsive behaviors, and perceived financial well-being in a single model in Türkiye. 1240 people over 18 years of age, who were determined by convenience sampling, participated in the study. Regression and mediation analyses were performed using CB-SEM. According to the results, BMI affects emotional eating and compulsive buying behavior in both men and women. While compulsive buying behavior affects current money management in both women and men, it has a significant effect on future financial security in women but no significant effect in men. Emotional eating partially mediates the relationship between body mass index and compulsive buying in women and is fully mediated in men. This study is the first to examine the relationship between body mass index as a measure of obesity and emotional eating, compulsive buying behavior as a mental disorder, and financial well-being as a result of purchasing decisions.
Key roles of Ubiquitination in Regulating Critical Regulators of cancer stem cell fun...
Qianqian  Guo
Hai Qin

Qianqian Guo

and 5 more

October 29, 2023
The ubiquitin (Ub) system, a ubiquitous presence across eukaryotes, plays a crucial role in in the precise orchestration of diverse cellular protein processes. From steering cellular signaling pathways and orchestrating cell cycle progression to guiding receptor trafficking and modulating immune responses. The dysregulation of Ub-mediated signaling pathways in prevalent cancers ushers in a spectrum of clinical outcomes ranging from tumorigenesis and metastasis to recurrence and drug resistance. Ubiquitination, a linchpin process mediated by Ub, assumes a central mantle in molding cellular signaling dynamics. It navigates transitions in biological cues and ultimately shapes the destiny of proteins. Recent years have witnessed an upsurge in the momentum surrounding the development of protein-based therapeutics aimed at targeting the Ub system under the sway of cancer stem cells (CSCs). The article provides a comprehensive overview of the ongoing in-depth discussions regarding the regulation of the Ub system and its impact on the development of CSCs. Amidst the tapestry of insights, the article delves into the expansive roles of E3 Ub ligases, deubiquitinases (DUBs), transcription factors entwined with CSCs. Furthermore, the spotlight turns to the interplay with pivotal signaling pathways the Notch, Hedgehog (Hh), Wnt/β-catenin, and Hippo-YAP signaling pathways all play crucial roles in regulation of CSCs following by the specific modulation of Ub-proteasome.
Comparison of the conventional echocardiographic parameters with the global longitudi...
Nana Gorgiladze
T. Gaprindashvili

Nana Gorgiladze

and 5 more

October 29, 2023
Abstract Introduction/Purpose Breast cancer patients undergoing chemotherapy are at risk of chemotherapy-induced cardiovascular toxicity (CTR-CVT). The right ventricle (RV) may also be susceptible to CTR-CVT and may exhibit symptoms of dysfunction before the left ventricle. Our study aims to compare the effectiveness of conventional echocardiographic parameters with the global longitudinal strain techniques in patients receiving low-dose anthracycline treatment and having low cardiovascular risk. Methods In a recent study, 28 women with low cardiovascular risk who underwent low-dose anthracycline chemotherapy for breast cancer were assessed for cardiac function using 2D echocardiography and speckle-tracking echocardiography. The measurements included LVEF, RVS’, TAPSE, LVGLS, and RVGLS. All patients had normal LVEF at the beginning of the study. Cardiotoxicity was defined as a new decrease in LVEF by 10% or below 53%, and/or changes in LVGLS/RVGLS by 15%. Results Our study found that the LVGLS decreased from -21.2%±2.1% to -18.6%±2.6% (t-test = -4.116; df = 54, p=0.001). Similarly, the RVGLS decreased from -25.2%±2.9% to -21.4%±4.4% (t-test = -3.82; df = 54, p=0.001). However, the measurements of right ventricular systolic function (RVS), tricuspid annular plane systolic excursion (TAPSE), and the left ventricular ejection fraction (LVEF) were insignificant. Conclusion(s) The study’s findings suggest that relatively new imaging technique GLS measurements are more sensitive than conventional echocardiographic parameters ( LVEF, TAPSE, RVS) for the detection of myocardial damage and a potential decline in cardiac function at the early stages of chemotherapy treatment. Moreover, RV-GLS is more sensitive to these changes despite the dosage and regimen of the chemotherapy.
A comparative study of left atrial appendage wall velocity (LAAWV) in correlation to...
Abhijit Bharali
Satyendra Tewari

Abhijit Bharali

and 7 more

October 29, 2023
Background: Left atrial appendage (LAA) function assessment is often overlooked in patients with heart failure and reduced ejection fraction (HFrEF), regardless of its etiology (ischemic or non-ischemic cardiomyopathy). With trans-thoracic tissue doppler echocardiographic (TDE), we compared LAA wall velocity with the conventional echocardiographic and biochemical parameters of heart failure by evaluating LVEF, LV GLS, E/e’ and serum NT pro-BNP level. Methods and Results: We evaluated 154 stable HFrEF patients with LVEF ≤ 40%. The mean age was 55.71 ± 12.48 years, with 59.09% being male and 40.91% female. Among them, 77.27% had dilated cardiomyopathy (DCMP), and 22.72% had ischemic cardiomyopathy (ICMP). The mean LVEF was 29.87 ± 5.8, LV GLS was -8.46 ± 2.74, mitral E/e’ was 13.33 ± 2.74, and LAA wall velocity was 14.26 ± 5.56. The mean NT pro-BNP level was 980.51 ± 611.77. Correlation analysis showed that LAA wall velocity significantly correlated with LVEF (r = 0.634, p < 0.001), had an inverse correlation with LV GLS (r = -0.671, p < 0.001), mitral E/e’ (r = -0.756, p < 0.001), and NT pro-BNP (r = -0.659, p = 0.007). Conclusion: TDE LAA wall velocity is a valuable and feasible method for evaluating HFrEF patients. Lower LAA wall velocity is associated with reduced LVEF, impaired LV GLS, elevated left ventricular filling pressure (E/e’), and higher NT pro-BNP levels.
Efficient Photolytic Halogenation and Oxidation of Unactivated Alkyl sp3 C−H Bonds wi...
Hao Jia
Nan Li

Hao Jia

and 9 more

October 29, 2023
A metal-free, green, and sustainable functionalization of unactivated alkyl sp3 C–H bonds is reported using iodine (III) as a feasible dehydrogenation agent under visible light or KBr, and alkyl chlorides, bromides, alcohols, and ketones could be constructed by addi-tion of different coupling reagents. Cheap and safe iodobenzene diacetate was used to form a strong radical to activate the alkyl sp3 C–H bond in a highly efficient manner, which can construct different alkylation products by adding corresponding coupling reagents.
Reduced kinetic mechanism for modeling high-temperature ignition and flames for n-pen...
Jaime Tiburcio-Cortés
Juan Prince

Jaime Tiburcio-Cortés

and 2 more

October 29, 2023
N-pentanol emerges as a promising substitute for fossil fuel due to its potential in reducing greenhouse gas emissions. This work presents a reduced combustion mechanism for modeling high-temperature ignition (T>1000 K) and flames for n-pentanol/air mixtures. The model comprises only 64 species and 282 chemical reactions. As we know, this is the first comprehensive study to include all available experimental data for these phenomena and this specific fuel/oxidizer mixture, reported in the literature. Our approach involves coupling a detailed sub-mechanism for n-pentanol to the San Diego mechanism, a reduced scheme for C1-C4 hydrocarbons, followed by systematic reduction using sensitivity analysis and steady-state approximation. We quantitatively assessed the agreement between experimental data and simulation results using deviation or error indicators, along with graphical comparisons. Remarkably, the ignition delay times, and flame speeds calculated using the reduced kinetic model exhibit a high agreement regarding the experimental data reported in the literature.
Leveraging Data-Driven strategy for Accelerating the Discovery of Polyesters with Tar...
Xiaoying He
Mengxian Yu

Xiaoying He

and 8 more

October 29, 2023
To overcome the limitations of empirical synthesis and expedite the discovery of new polymers, this work aims to develop a data-driven strategy for profoundly aiding in the design and screening of novel polyester materials. Initially, we collected 695 polyesters with their associated glass transition temperatures (Tgs) to develop a quantitative structure-property relationship (QSPR) model. The model underwent rigorous validation (external validation, internal validation, Y-random and application domain analysis) to demonstrate its robust predictive capabilities and high stability. Subsequently, by employing an in-silico retrosynthesis strategy, over 95000 virtual polyesters were designed, largely expanding the available space for polyester materials. External assessments highlight the good extrapolation ability of the QSPR model. Furthermore, we experimentally synthesized diverse virtual polyesters with Tgs covering a sufficient large temperature range. It is believed that this data-driven approach can drive future product development of polymer industry.
Coronene Doped Ultra--Long RTP Polymers with Visible Light Excitability in Air
Guanyu Liu
Junwu Chen

Guanyu Liu

and 6 more

October 28, 2023
Abstract: It is emphasized that hetero- and heavy-atoms and specific inter-molecular interactions are essential for ultra-long organic room temperature phosphorescence (RTP), moreover, the RTP production dominantly requires high-energy UV light excitation. In the current work, we present that coronene (Cor) doped PMMA and PS can all emit bright and ultra-long RTP with lifetimes of 4.43 and 2.97 s in air under 365 nm light excitation, respectively. More significantly, it is first found that both Cor/PMMA and Cor/PS exhibit rare visible light excitability up to 500 nm, and their afterglows are naked-eye visible and the RTP lifetimes are up to 2.46 and 2.11 s under 440 nm light excitation, respectively. However, hetero- and heavy-atom-free Cor has neither common spin-orbital coupling nor visible light absorption band in polymer film, and Cor/PS is a full hydrocarbon system. Therefore, we propose that the multi-resonance effect and largely fused  systems are responsible for the abundant triplet population and the visible light excitability, signifying the significant enhancement of direct S0‒T1 transition. This work demonstrates a fresh RTP material system and phenomenon and provides a new perspective of understanding organic triplet generation and radiation.
Involvement of Escherichia coli YbeX/CorC in ribosomal metabolism
İsmail Sarıgül
Amata Žukova

İsmail Sarıgül

and 7 more

October 28, 2023
YbeX of Escherichia coli, a member of the CorC protein family, is encoded in the same operon with ribosome-associated proteins YbeY and YbeZ. Here, we report the involvement of YbeX in ribosomal metabolism. The ΔybeX cells accumulate distinct 16S rRNA degradation intermediates in the 30S particles and the 70S ribosomes. E. coli lacking ybeX has a lengthened lag phase upon outgrowth from the stationary phase. This growth phenotype is heterogeneous at the individual cell level and especially prominent under low extracellular magnesium levels. The ΔybeX strain is sensitive to elevated growth temperatures and to several ribosome-targeting antibiotics that have in common the ability to induce the cold shock response in E. coli. Although generally milder, the phenotypes of the ΔybeX mutant overlap with those caused by ybeY deletion. A genetic screen revealed partial compensation of the ΔybeX growth phenotype by the overexpression of YbeY. These findings indicate an interconnectedness amongst the ybeZYX operon genes, highlighting their roles in ribosomal assembly and/or degradation.
Sexual and Reproductive Health Education in Sub-Saharan Africa: Effects of SRH Educat...
Hafsat Yahaya
Peter Akinwole

Hafsat Yahaya

and 6 more

October 28, 2023
Exactly 9% of the world’s HIV-positive people live in Nigeria. Over 6 million persons with HIV are still reported to live in South Africa. The adult prevalence rate is 26.5% in Swaziland, followed by 17.9%, 13.3%, and 11.1% in South Africa, Namibia, and Mozambique, respectively. South Africa, where females had a three times higher annual incidence than males (1.5% vs 0.5), saw the greatest rate of new HIV infections in 2017 among youths between the ages of 15 and 24 (1% annual incidence). The inadequate access to and rates of HIV testing among teenagers in high HIV burden African countries have been emphasized. An effective Sexual and Reproductive Health Education (SRHE) will go a long way in promoting healthy behaviors and reduce the transmission of HIV and sexually transmitted infections (STI’s). Youth-targeted television shows and other cutting-edge Comprehensive Sexuality Education (CSE) programs have been successful in giving young people the knowledge and skills they need to protect themselves and make responsible sexual health decisions. However, important obstacles such as societal hurdles, educator resistance, and gender inequities continue to exist. A multidimensional strategy, including thorough curricula, teacher training, peer education, coordination with healthcare providers, community participation, and family involvement, is needed to overcome these barriers.
Measurement of the Spatiotemporal Disparities in the Equalization Level of Basic Medi...
Hailong Fan
Haibin Wei

Hailong Fan

and 1 more

October 28, 2023
Abstract Objective This study aims to explore the spatiotemporal disparities in the equalization of basic medical and health services in China, in order to provide reference and guidance for promoting the equalization process of basic medical and health services and ensuring the fair enjoyment of citizens’ right to life and health. Methods Based on the theory of Structure-Process-Outcome(SPO), a comprehensive evaluation index system of equalization level was constructed with 22 core indicators of basic medical and health services, from the three dimensions of medical and health investment, health service utilization, and medical service effectiveness. The Generalized Principal Component Analysis (GPCA) model was used to calculate the equalization level of basic medical and health services in 31 provinces, municipalities, and autonomous regions from 2011 to 2021. Furthermore, the kernel density estimation and Moran’s I model was employed to analyze the correlation and disparity at the spatial level. Results 1. From a national perspective, the level of equalization of basic medical and health services in China has significantly improved from 2011 to 2021. The mean score of national equalization level increased from -0.605 to 0.174, with an increase of 128.75%.
Pupil versus 1 st Purkinje capsulotomy centration with femtosecond laser: long term o...
Ramiro M. P. C. Salgado
Paulo F. A. A. S. Torres

Ramiro M. P. C. Salgado

and 2 more

October 28, 2023
Purpose: To assess the role of femtosecond laser-assisted capsulotomy centration in the long-term intraocular positioning of a multifocal intraocular lens. Design: Prospective comparative study. Methods: A total of 60 eyes of 30 patients underwent femtosecond laser–assisted Refractive Lens Exchange (RLE). For every patient, capsulotomy centration was randomly performed according to pupil centre (PC) in one eye and first Purkinje reflex (FPR) in the other. The intraocular lens (IOL) positioning, visual acuities, spherical equivalent, internal aberrometry and quality of vision were assessed and compared at 3 years’ follow-up between groups (PC and FPR). Results: Intraocular lens positioning showed a statistically significant difference between groups, with a closer centration to the visual axis in the FPR patients (p=<0.001). Internal aberrometry showed higher values in the PC capsulotomy centration group (p<0.01). Conclusions: First Purkinje reflex (FPR) centered capsulotomy is associated to a closer centration of the IOL to the visual axis.
The Effect of Different Treatment Modalities on Dentinal Tubule Occlusion: An In Vitr...
Eser Elemek
Ömer Birkan Ağralı

Eser Elemek

and 6 more

October 28, 2023
Purpose:The aim of this study was to assess the effect of mouthwash, diode laser and their combination on dentin hypersensitivity(DH). Methods:Forty dentin specimens were enabled and exposed dentinal tubules were created in vitro. They are assigned into four groups; control group, mouthwash with 1.4% dipotassium oxalate, combination of the same mouthwash and 810 nm diode laser, only diode laser. The occlusion of dentinal tubules were then observed with SEM. Results:The analysis resulted with the occlusion of dentinal tubules in all treatment groups but the results were more prominent in the combined treatment group. The number of open dentinal tubules in 100µm 2 was significantly more in control group(p<0.05). Conclusion:Dentinal tubule occlusion was achieved both by mouthwash with 1.4% dipotassium oxalate and 810 nm diode laser. However, the combination of both treatments resulted with the best outcome and can be used in patients with dentin hypersensitivity.
Three-Phase Steady-State Models of Distributed Generators with Different Control Stra...
Qijia Yang
Zhengchun Du

Qijia Yang

and 3 more

March 22, 2023
This paper proposes three-phase steady-state models for distributed generators (DGs) with different negative control strategies. An augmented rectangular load flow method is used for three-phase distribution systems. For two types of DGs with power electronic devices: photovoltaic power generators and doubly-fed induction generators, the nodal voltage equations and output power equations are derived. Moreover, under unbalanced conditions, the strategies for mitigating the effects caused by negative sequence components are formulated as functions of the nodal voltage and the injected current. Furthermore, the models are incorporated into an augmented rectangular load flow method with nodal voltage and injected current as state variables in three-phase systems. Case studies are conducted to verify the correctness and accuracy of the proposed models by comparing the results obtained from MATLAB and PSCAD.
Thermodynamics and characteristics of heterogeneous nucleation of CO2 hydrate by frac...
Mengyang Li
Shuanshi Fan

Mengyang Li

and 4 more

October 28, 2023
The massive emission of the greenhouse gas CO2 has had a significant effect on the global climate and environment, causing widespread concern around the globe. CO2 storage in clathrate hydrate is a possible strategy for reducing atmospheric CO2. Nevertheless, the CO2 hydrate formation rate is slow and the corresponding nucleation mechanism is unknown, limiting the commercial application of this technology. This study developed a thermodynamic model based on the classical nucleation theory, considering the effects of surface geometry and CO2 dissolution on the solution's activity. The critical nucleation radius and energy barrier of CO2 hydrate nucleation were determined through numerical calculation. It was discussed how pressure, temperature, wall curvature, roughness, wettability, and solution activity affect the nucleation of CO2 hydrate. This paper's research findings contribute to advancing carbon capture and storage technology based on the hydrate method.
RSscore: Reaction Superiority Learned from Reaction Mapping Hypergraph
Chenyang Xu
Lijuan Guo

Chenyang Xu

and 2 more

October 27, 2023
The selection of chemical reactions is directly related to the quality of synthesis pathways, a reasonable reaction evaluation index plays a crucial role in the design and planning of synthesis pathways. Since the construction of traditional reaction evaluation indicators mostly rely on the structure of molecules rather than the reactions themselves, considering the impact of reaction agents poses a challenge for traditional evaluation indicators. In this study, we first propose a chemical reaction graph descriptor that includes the mapping relationship of atoms to effectively extract reaction features. Then, through pre-training using graph contrastive learning and fine-tuning through supervised learning, we establish a model for generating the probability of reaction superiority (RSscore). Finally, to validate the effectiveness of the current evaluation index, RSscore is applied in two applications: reaction evaluation and synthesis routes analysis, which proves that the RSscore provides an important agents-considered evaluation criterion for Computer-Aided Synthesis Planning (CASP).
Physiological and transcriptomic characterization of cold acclimation in endodormant...
Hongrui Wang
Al P. Kovaleski

Hongrui Wang

and 2 more

October 27, 2023
It is essential for the survival of grapevines in cool climate viticultural regions that vines properly acclimate in the late fall and early winter and develop freezing tolerance. Climate change-associated abnormities in temperature during the dormant season, including oscillations between extreme cold and prolonged warmth, impacts cold acclimation and threatens the sustainability of the grape and wine industry. We conducted two experiments in controlled environment to investigate the impacts of different temperature regimes on cold acclimation ability in endodormant grapevine buds through a combination of freezing tolerance based physiological and RNA-seq based transcriptomic monitoring. Results show that the freezing tolerance of buds was not altered from field levels when exposed to stable temperatures ranging from 2 °C to 22 °C but was enhanced when exposed to temperature cycling (7±5 °C). We also characterized the transcriptomic response of endodormant buds to high and low temperatures and the potential genetic control for the maintenance of endodormancy. Several pathways that were previously reported to be responsive or functional during cold acclimation, such as the ICE-CBF-COR cascade, were not observed to play a role in the enhancement of freezing tolerance or the sensing of different temperatures, indicating our current understanding of the genetic control of cold acclimation remains a challenge when generalizing across plant species and phenological stages.
Shining Light on Diurnal Regulation of Non-Photochemical Quenching: How do Gradual Li...
Martina Lazzarin
Steven Driever

Martina Lazzarin

and 4 more

October 27, 2023
Maximal sunlight slowly varies over a day due to earth’s rotation. However, it is unknown whether this predictable daily light pattern influences the short-term regulation of non-photochemical quenching (NPQ) responses across the day. Diurnal variation in NPQ at growth light intensity, NPQ capacity and kinetics during and after 30-minute high light period, were measured in tomato plants grown in diurnal constant (DC) or diurnal parabolic (DP) light intensity. We also measured leaf gas exchange and the violaxanthin de-epoxidation state (DES) during and after 30-minute high light period at different time points in the day. A clear diurnal pattern emerged in NPQ induction kinetics in DP-grown plants, which was characterized by longer time for NPQ to reach its maximal value at the end of the photoperiod compared to midday, but with the highest capacity. The observed diurnal variations in NPQ capacity were not explained by the DES, but were associated with slower relaxation of qE. These diurnal patterns in NPQ responses were less pronounced in DC-grown plants. Concurrently, CO 2 assimilation rate and stomatal conductance were lowest in the end of day but similar between light regimes. We conclude that the diurnal short-term responses of NPQ involves regulation of its ∆pH-dependent component, which in turn can be influenced by the partitioning of proton motive force.
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