Surface tension in biological systems - a common problem with a variety of solutions

Soncini, Roseli; Klein, Wilfried

doi:10.1016/j.cbpa.2023.111475

Cited by 4 publications

(1 citation statement)

References 66 publications

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“…47,61,63,73 Our equation covers a wide range of temperature (298−373 K), pressure (50−400 bar), and salinity (up to 3.15 mol/kg), and it can be applied to different gas compositions. We note that while lowpressure gas-brine/water IFT is important in surfactant flooding 76,77 and biological processes, 78,79 UHS is subject to high-pressure conditions 6−9 and the 1/P terms in eq 10 do not cause divergences under the conditions we studied. The training and testing sets (840 data points in total) generated by the MD simulation are provided in the SI.…”

Section: Ml-based Ift Equationmentioning

confidence: 75%

Machine Learning-Based Interfacial Tension Equations for (H₂ + CO₂)-Water/Brine Systems over a Wide Range of Temperature and Pressure

Xie,

Zhang,

Jin

2024

Langmuir

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Large-scale underground hydrogen storage (UHS) plays a vital role in energy transition. H2-brine interfacial tension (IFT) is a crucial parameter in structural trapping in underground geological locations and gas–water two-phase flow in subsurface porous media. On the other hand, cushion gas, such as CO2, is often co-injected with H2 to retain reservoir pressure. Therefore, it is imperative to accurately predict the (H2 + CO2)-water/brine IFT under UHS conditions. While there have been a number of experimental measurements on H2-water/brine and (H2 + CO2)-water/brine IFT, an accurate and efficient (H2 + CO2)-water/brine IFT model under UHS conditions is still lacking. In this work, we use molecular dynamics (MD) simulations to generate an extensive (H2 + CO2)-water/brine IFT databank (840 data points) over a wide range of temperature (from 298 to 373 K), pressure (from 50 to 400 bar), gas composition, and brine salinity (up to 3.15 mol/kg) for typical UHS conditions, which is used to develop an accurate and efficient machine learning (ML)-based IFT equation. Our ML-based IFT equation is validated by comparing to available experimental data and other IFT equations for various systems (H2-brine/water, CO2-brine/water, and (H2 + CO2)-brine/water), rendering generally good performance (with R 2 = 0.902 against 601 experimental data points). The developed ML-based IFT equation can be readily applied and implemented in reservoir simulations and other UHS applications.

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Section: Ml-based Ift Equationmentioning

confidence: 75%

Machine Learning-Based Interfacial Tension Equations for (H₂ + CO₂)-Water/Brine Systems over a Wide Range of Temperature and Pressure

Xie,

Zhang,

Jin

2024

Langmuir

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Phylogenomics, Classification, and Lifestyle Evolution in Raft- and Nursery web- Spiders (Araneae: Dolomedidae and Pisauridae)

Yu,

Cheng,

Haddad

et al. 2024

Preprint

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Pisauridae Simon, 1890 or “nursery web spiders” are a global and heterogenous assemblage of spider genera with diverse lifestyles, containing web builders and webless species, as well as terrestrial and semi-aquatic species, notably “fishing spiders”, genusDolomedesLatreille, 1804. Incomplete, unresolved, or conflicting phylogenies have so far hampered testing forDolomedesand pisaurid monophyly and evolution. Here, we broadly address these questions within a phylogenomic and comparative framework. Our goals are i) reconstruction of a robust phylogeny to test the monophyly ofDolomedesand Pisauridae and to amendDolomedesclassification; ii) estimation of evolutionary shifts and trends in lifestyles and capture webs; and iii) evaluation of hypotheses of morphological trait association with a semi-aquatic lifestyle. To this end we generate subgenomic data (ultraconserved elements or UCE) for 53Dolomedesspecies and 28 pisaurid genera. We analyze these data using maximum likelihood, Bayesian, and multi-species coalescence approaches, as well as using two different phylogenetic time calibration methods, RelTime and MCMCtree. Consistent across analytical approaches, our phylogenies reject the monophyly of both Pisauridae andDolomedes. “Pisaurid” genera fall into three clades: 1) Focal Clade I groups the majority, includingPisauraSimon, 1886, hence representing true pisaurids; 2) Focal Clade II =BlandiniaTonini et al., 2016 is sister to Trechaleidae Simon, 1890 and Lycosidae Sundevall, 1833; 3) Focal Clade III with fishing and raft spiders groupsDolomedes,MegadolomedesDavies and Raven, 1980, andOrnodolomedesRaven and Hebron, 2018 and is sister to Focal Clade II, Trechaleidae, and Lycosidae. Our taxonomy, based on complementary taxa and morphological evidence, resurrects Dolomedidae Simon, 1876 to includeDolomedesand the Oceanic generaBradystichusSimon, 1884,Megadolomedes,CaledomedesRaven and Hebron, 2018,MangromedesRaven and Hebron, 2018,Ornodolomedes, andTasmomedesRaven and Hebron, 2018. Both RelTime and MCMCtree analyses yield comparable divergence estimations: Pisauridae origin is estimated between 29 and 40 Ma;Blandiniabetween 21 and 34 Ma; Dolomedidae between 10 and 17 Ma; andDolomedesbetween 9 and 16 Ma. In order to avoid misleading significant correlations and/or over-resolved ancestral states, we performed taxon sampling bias correction in all evolutionary analyses. Evolutionary analyses reconstruct semi-aquatic lifestyle as ancestral to a large clade containing pisaurids, lycosids, trechaleids,Blandinia, and dolomedids, with several reversals to terrestrial lifestyle. Capture webs evolved at least three times, with reversals. Counter to expectation, the evolution of lifestyles and capture webs are independent. Although leg and tarsus lengths do not indicate lifestyles, semi-aquatic taxa are significantly larger than terrestrial ones. We explain this pattern with a biomechanical threshold over which surface tension can be broken while spiders forage under water. Our time-calibrated analyses indicate that the evolution of terrestrial and web-building lifestyles from semi-aquatic ancestors in Pisauridae coincided with cooling and drying climates in the mid-Miocene. We therefore hypothesize that climatic changes have acted as strong selection pressures toward lifestyle diversification.

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Natural Mucilage From Phoenix dactylifera L. as an Alternative for Artificial Saliva

Suksaeree,

Maneewattanapinyo

2024

Scientifica

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The sensation of dry mouth is a clinical illness known as xerostomia. Treatment is necessary for alleviating symptoms in patients who experience either transient or persistent dry mouth. It is essential to develop artificial saliva for this purpose. The fruit of the Phoenix dactylifera is edible and has been used in food. Its mucilage from dried fruits was extracted by soaking in distilled water and precipitated with 90% v/v ethanol. The mucilage of P. dactylifera was used for producing artificial saliva and was combined with other components including proteins and electrolytes. The translucent light brown gel solution was seen in the artificial saliva using P. dactylifera mucilage. The measured relative density ranged from 1.02 to 1.15 g/mL. Artificial saliva had to become more viscous with the addition of P. dactylifera mucilage and its concentration. Their pH values ranged between 6.98 and 7.15. The produced artificial saliva had a wetting time ranging from 7.53 to 9.70 min, which is similar to the typical human saliva. Artificial saliva could form a film in the mouth after certain periods. It was found that artificial saliva exhibited many adsorption bands corresponding to various biomolecules, such as protein, carbohydrate, and lipid, and had a unique peak at 275 nm. The results of this investigation suggest that a formulation including mucilage from P. dactylifera may be utilized to treat xerostomia patients by temporarily lubricating and hydrating their mouths when they experience persistent dry mouth.

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Surface tension in biological systems - a common problem with a variety of solutions

Cited by 4 publications

References 66 publications

Machine Learning-Based Interfacial Tension Equations for (H₂ + CO₂)-Water/Brine Systems over a Wide Range of Temperature and Pressure

Machine Learning-Based Interfacial Tension Equations for (H₂ + CO₂)-Water/Brine Systems over a Wide Range of Temperature and Pressure

Phylogenomics, Classification, and Lifestyle Evolution in Raft- and Nursery web- Spiders (Araneae: Dolomedidae and Pisauridae)

Natural Mucilage From Phoenix dactylifera L. as an Alternative for Artificial Saliva

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Surface tension in biological systems - a common problem with a variety of solutions

Cited by 4 publications

References 66 publications

Machine Learning-Based Interfacial Tension Equations for (H2 + CO2)-Water/Brine Systems over a Wide Range of Temperature and Pressure

Machine Learning-Based Interfacial Tension Equations for (H2 + CO2)-Water/Brine Systems over a Wide Range of Temperature and Pressure

Phylogenomics, Classification, and Lifestyle Evolution in Raft- and Nursery web- Spiders (Araneae: Dolomedidae and Pisauridae)

Natural Mucilage From Phoenix dactylifera L. as an Alternative for Artificial Saliva

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Product

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Machine Learning-Based Interfacial Tension Equations for (H₂ + CO₂)-Water/Brine Systems over a Wide Range of Temperature and Pressure

Machine Learning-Based Interfacial Tension Equations for (H₂ + CO₂)-Water/Brine Systems over a Wide Range of Temperature and Pressure