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Experimental tests for a liquid-liquid critical point in water

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Science China(Physics,Mechanics & Astronomy) 2020年第12期63卷 30-71页

作者： Domenico Mallamace Carmelo Corsaro Francesco Mallamace h.Eugene stanley Department ChiBioFarAm(Industrial Chemistry) University of MessinaERIC and CASPE/INSTMMessina 98166Italy Dipartimento MIFT Universitàdi MessinaMessina 98166Italy Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridge MA 02139USA Istituto dei Sistemi Complessi(ISC)-CNR Rome 00185Italy Center for Polymer Studies and Department of Physics Boston UniversityBoston MA 02215USA

Water is a fascinating *** composition is simple—one oxygen and two hydrogen atoms—but its chemistry and physics are extremely complex and exhibit 75 documented *** these anomalies and their molecular origin are not completely understood,we know that hydrogen bonds play key roles in all of the phases of ***,there is experimental evidence that the polymorphism of the ice structure extends into the liquid phase and is associated with a liquid-liquid coexistence *** is currently a topic of great interest in water research because there are indications that the end point of the coexistence line corresponds to a second critical point inside the supercooled liquid *** examine the recent progress in understanding water anomalies and the liquid-liquid phase transition hypothesis,including the results of recent experimental work and molecular simulations of both bulk and confined *** examine experimental results that test whether the behavior of liquid water is consistent with the"liquid polymorphism"hypothesis that liquid water can exist in two distinct phases of differing *** also examine recent research on the anomalies of nanoconfined water and,in particular,on water in biological *** find that the concept of liquid polymorphism can also describe the properties of other liquids that have two characteristic length scales.

关键词： hydrophobic-hydrophilic interactions water systems thermal properties

Water and lysozyme： Some results from the bending and stretching vibrational modes

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Frontiers of physics 2015年第5期10卷 27-34页

作者： FrancescoMallamace Carmelo Corsaro Domenico Mallamace Cirino Vasi Nicola Cicero h. Eugene stanley Dipartimento di Fisica e Scienze della Terra Universita di Messina 1-98166 Messina Italy Department of Nuclear Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA Center for Polymer Studies and Department of Physics Boston University Boston MA 02215 USA Consiglio Nazionale delle Ricerche-IPCF Messina 1-98166 Messina Italy Dipartimento di Scienze dell'Ambiente della Sicurezza del Territorio degli Alimenti e della Salute Universita di Messina Viale F. Stagno d'Alcontres 31 98166 Messina Italy

The dynamic or glass transition in biomolecules is important to their functioning. Also essential is the transition between the protein native state and the unfolding process. To better understand these transitions, we use Fourier transform infrared spectroscopy to study the vibrational bending and stretching modes of hydrated lysozymes across a wide temperature range. We find that these transitions are triggered by the strong hydrogen bond coupling between the protein and hydration water. More precisely, we demonstrate that in both cases the water properties dominate the evolution of the system. We find that two characteristic temperatures are relevant： in the supercooled regime of confined water, the fragile-to-strong dynamic transition occurs at TL, and in the stable liquid phase, T＊ 315 ± 5 K characterizes the behavior of both isothermal compressibility KT（T, P） and the coefficient of thermal expansion ap（T, P）.

关键词： protein unfolding hydration water infrared spectroscopy

Tropical pyomyositis presenting as sepsis with acute respiratory distress syndrome

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Asian Pacific Journal of Tropical Medicine 2011年第4期4卷 325-327页

作者： Siddalingana Gouda TG h Manjunath hande Weena stanley Ragini Bargur Department of Medicine Kasturba Medical College

Tropical pyomyositis is an underdiagnosed *** reported a 35 year old male farmer,who presented with septicemia and acute respiratory distress syndrome due to pyomyositis involving the paraspinal *** of the pus grew methicillin sensitive Staphylococcus aureus, and the patient recovered after surgical drainage and antibiotic treatment Diagnostic delays can be avoided if tropical pyomyositis is considered as a differential diagnosis in patients with septicemia.

关键词： Tropical pyomyositis Staphylococcus aureus Sepsis Acute respiratory distress syndrome

Plant population and genotype effects override the effects of Epichloë endophyte species on growth and drought stress response of Achnatherum robustum plants in two natural grass populations

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Journal of Plant Ecology 2015年第6期8卷 633-641页

作者： Tong Jia Tatsiana Shymanovich Yu-Bao Gao stanley h.fae.h Department of Plant Biology and Ecology College of Life SciencesNankai University94 Weijin RoadTianjin 300071China Department of Biology University of North Carolina Greensboro312 Eberhart Bldg.GreensboroNC 27412USA

Aims In cool-season grasses,systemic and vertically transmitted Epichloëinfections often provide a suite of benefits including increased growth,reproduction and competitive ***,these effects of Epichloëendophytes on their hosts often depend upon host and endophyte genotype and environmental *** Achnatherum robustum(sleepygrass)harbors at least two Epichloëspecies within natural populations in the southwest *** tested the effects of endophyte infection and species,host population and plant genotype(by experimentally removing the endophyte),and soil moisture(a key limiting factor)on growth and drought stress response of infected *** plants from two populations(Weed and Cloudcroft)in the sacremento mountains of New mexico,USA).Important Findingsalthough the two populations harbor distinct Epichloëspecies each with very different chemoprofiles,neither endophyte status(infected ***)nor endophyte species affected most growth param-eters at 8 or 25 weeks of the experiment,except for leaf *** high water treatment,infected plants from the Weed population had longer leaf length compared with uninfected *** contrast,the population of origin affected all growth parameters,including plant height,leaf number,length and width,tiller number and shoot and root biomass,as well as wilting *** from the Cloudcroft population generally showed greater growth than grasses from the Weed *** infection did affect wilting time,with infection in the Weed population generally reducing time to wilting under low and high water,whereas infection in the Cloudcroft population reduced time to wilting only under high water *** results suggest that plant population and their associated plant genotypes may play a much larger role in endophyte-host grass interactions in varying environments than previously *** Epichloëspecies may be compatible with only specific host genotypes within populations such

关键词： endophyte genotype Epichloe infection growth parameters sleepygrass wilting time

Spatiotemporal Input Control:Leveraging Temporal Variation in Network Dynamics

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IEEE/CAA Journal of Automatica Sinica 2022年第4期9卷 635-651页

作者： Yihan Lin Jiawei Sun Guoqi Li Gaoxi Xiao Changyun Wen Lei Deng h.Eugene stanley the Department of Precision Instrument Tsinghua University the Department of Bio-engineering Stanford University IEEE the Institute of Automation Chinese Academy of Sciences the School of Electrical and Electronic Engineering Nanyang Technological University Department of Physics and Center for Polymer Studies Boston University

The number of available control sources is a limiting factor to many network control tasks.A lack of input sources can result in compromised controllability and/or sub-optimal network performance,as noted in engineering applications such as the smart *** mechanism can be explained by a linear timeinvariant model,where structural controllability sets a lower bound on the number of required *** by the ubiquity of time-varying topologies in the real world,we propose the strategy of spatiotemporal input control to overcome the source-related limit by exploiting temporal variation of the network *** theoretically prove that under this regime,the required number of sources can always be reduced to *** is further shown that the cost of control depends on two hyperparameters,the numbers of sources and intervals,in a trade-off *** a demonstration,we achieve controllability over a complex network resembling the nervous system of Caenorhabditis elegans using as few as 6%of the sources predicted by a static control *** example underlines the potential of utilizing topological variation in complex network control problems.

关键词： Complex network complex system control theory complex system optimization temporal network time-varying system

history-dependent percolation on multiplex networks

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National Science Review 2020年第8期7卷 1296-1305页

作者： Ming Li Linyuan Lü Youjin Deng Mao-Bin hu hao Wang Matú? Medo h.Eugene stanley Department of Thermal Science and Energy Engineering University of Science and Technology of China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Alibaba Research Center for Complexity Sciences Hangzhou Normal University Beijing Computational Science Research Center hefei National Laboratory for Physical Sciences at Microscale Department of Modern Physics and CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Department of Physics and Center for Polymer Studies Boston University

The structure of interconnected systems and its impact on the system dynamics is a much-studied cross-disciplinary topic. Although various critical phenomena have been found in different models, study of the connections between different percolation transitions is still lacking. here we propose a unified framework to study the origins of the discontinuous transitions of the percolation process on interacting networks. The model evolves in generations with the result of the present percolation depending on the previous state, and thus is history-dependent. Both theoretical analysis and Monte Carlo simulations reveal that the nature of the transition remains the same at finite generations but exhibits an abrupt change for the infinite generation. We use brain functional correlation and morphological similarity data to show that our model also provides a general method to explore the network structure and can contribute to many practical applications, such as detecting the abnormal structures of human brain networks.

关键词： percolation multiplex networks critical phenomena brain networks

Contrasting microscopic interactions determine the properties of water/methanol solutions

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Frontiers of physics 2018年第1期13卷 51-56页

作者： Carmelo Corsaro Francesco Mallamace Sebastiano Vasi Sow-hsin Chen h. Eugene stanley Domenico Mallamace CNR-IPCF Messina Istituto per i Processi Chimico-Fisici Viale F. Stagno D'Alcontres 37 98158 Messina Italy Dipartimento MIFT Sezione di Fisica Universita di Messina Viale F. Stagno D'Alcontres 31 98166 Messina Italy Department of Nuclear Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA Center for Polymer Studies and Department of Physics Boston University Boston MA 02215 USA Consorzio interuniversitario per lo sviluppo dei Sistemi a Grande Interfase - CSGI Via della Lastruccia 3 50019 Sesto Fiorentino Firenze Italy

herein we study the different microscopic interactions occurring in water/methanol solutions at dif- ferent methanol molar fractions, using NMR spctroscopy. Temperature was found to determine which interaction dominates. It was found that the mixing between water and methanol is non-ideal because of the presence of interactions like hydrophobicity and hydrophilicity. These results indicate that the competition between hydrophilic and hydrophobic interactions is different in different thermal regions, and that the physical properties of the solution are determined by the character of the solution itself, which in turn depends on the mole fraction of methanol and on the temperature.

关键词： aqueous solutions hydrophobicity NMR hydrophilicity

Dynamical changes in hydration water accompanying lysozyme thermal denaturation

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Frontiers of physics 2015年第5期10卷 35-41页

作者： Francesco Mallamace Carmelo Corsaro Domenico Mallamace Nicola Cicero Sebastiano Vasi Giacomo Dugo h. Eugene stanley CNR-IPCF Messina Istituto per i Processi Chimico-Fisici Viale F. Stagno D'Alcontres 37 98158 Messina Italy Dipartimento di Fisica e Scienze della Terra Universitd di Messina Viale F. Stagno D'Alcontres 31 98166 Messina Italy Center for Polymer Studies and Department of Physics Boston University Boston MA 02215 USA Dipartimento di Scienze dell'Ambiente della Sicurezza del Territorio degli Alimenti e della Salute Universita di Messina Viale F. Stagno d'Alcontres 31 98166 Messina Italy

We study the dynanfics of the first hydration shell of lysozyme to determine the role of hydra- tion water that accompanies lysozyme thermal denaturation. We use nuclear magnetic resonance spectroscopy to investigate both the translational and rotational contributions. Data on proton self-diffusion and reorentational correlation time indicate that the kinetics of the lysozyme fold- ing/unfolding process is controlled by the dynamics of the water molecules in the first hydration shell. When the hydration water dynamics change, because of the weakening of the hydrogen bond network, the three-dimensional structure of the lysozyme is lost and denaturation is triggered. Our data indicates that at temperatures above approximately 315 K, water behaves as a simple liquid and is no longer a good solvent.

关键词： lysozyme unfolding hydration water NMR correlation time solvent dynamics

Cannabis use history is associated with increased prevalence of ascites among patients with nonalcoholic fatty liver disease:A nationwide analysis

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World Journal of hepatology 2020年第11期12卷 993-1003页

作者： Catherine J Choi stanley h Weiss Umair M Nasir Nikolaos T Pyrsopoulos Department of Medicine Rutgers New Jersey Medical SchoolNewarkNJ 07101United States Department of Medicine Biostatistics and EpidemiologyRutgers New Jersey Medical SchoolNewarkNJ 07103United States Division of Gastroenterology and hepatology Department of MedicineRutgers-New Jersey Medical SchoolNewarkNJ 07103United States

BACKGROUND Recent studies have revealed the endocannabinoid system as a potential therapeutic target in the management of nonalcoholic fatty liver disease(NAFLD).Cannabis use is associated with reduced risk for NAFLD,we hypothesized that cannabis use would be associated with less liver-related clinical complications in patients with *** To assess the effects of cannabis use on liver-related clinical outcomes in hospitalized patients with *** We performed a retrospective matched cohort study based on querying the 2014 National Inpatient Sample(NIS)for hospitalizations of adults with a diagnosis of *** NIS database is publicly available and the largest all-payer inpatient database in the United *** patients with cannabis use were selected as cases and those without cannabis were selected as ***-control matching at a ratio of one case to two controls was performed based on sex,age,race,and *** liver-related outcomes such as portal hypertension,ascites,varices and variceal bleeding,and cirrhosis were compared between the *** A total of 49911 weighed hospitalizations with a diagnosis of NAFLD were *** these,3820 cases were selected as the cannabis group,and 7625 noncannabis cases were matched as *** with cannabis use had a higher prevalence of ascites(4.5%vs 3.6%),with and without cannabis use,P=*** prevalence of portal hypertension(2.1%vs 2.2%),varices and variceal bleeding(1.3%vs 1.7%),and cirrhosis(3.7%vs 3.6%)was not different between the groups,with and without cannabis use,all P>***,race/ethnicity other than White,Black,Asian,Pacific Islander or Native American,and higher comorbidity score were independent risk factors for ascites in the cannabis *** non-cannabis users,obesity and hyperlipidemia were independent protective factors against ascites while older age,Native American and higher comorbidity index were independent risk factors for ***

关键词： Nonalcoholic fatty liver disease Fatty liver Cannabis Marijuana use Liver diseases hospitalization