On the stability of thin films of pure water

Karakashev, Stoyan I.; Firouzi, Mahshid; Wang, Jianlong; Alexandrova, L.; Nguyen, Anh V.

doi:10.1016/j.cis.2019.03.005

Cited by 20 publications

(14 citation statements)

References 40 publications

(40 reference statements)

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“…Certain members of family Symbiodiniaceae are known to exist both in a free-living state (Coffroth, Lewis, Santos, & Weaver, 2006; Decelle et al, 2018) and as endosymbionts within cnidarian hosts (Stambler, 2011). Our transcriptome analysis on cultured and in hospite Breviolum minutum highlights how distinct the two life stages are, while the clustering of biological replicates is indicative of robustness in our analysis (Figure 1).…”

Section: Gene Expression Patterns Of Symbiodiniaceae Reflect In Hosmentioning

confidence: 82%

Symbiotic lifestyle triggers drastic changes in the gene expression of the algal endosymbiont Breviolum minutum (Symbiodiniaceae)

Maor-Landaw

Oppen

McFadden

2019

Ecology and Evolution

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Coral-dinoflagellate symbiosis underpins the evolutionary success of corals reefs. Successful exchange of molecules between the cnidarian host and the Symbiodiniaceae algae enables the mutualistic partnership. The algae translocate photosynthate to their host in exchange for nutrients and shelter. The photosynthate must traverse multiple membranes, most likely facilitated by transporters. Here, we compared gene expression profiles of cultured, free-living Breviolum minutum with those of the homologous symbionts freshly isolated from the sea anemone Exaiptasia diaphana, a widely used model for coral hosts. Additionally, we assessed expression levels of a list of candidate host transporters of interest in anemones with and without symbionts. Our transcriptome analyses highlight the distinctive nature of the two algal life stages, with many gene expression level changes correlating to the different morphologies, cell cycles, and metabolisms adopted in hospite versus free-living.Morphogenesis-related genes that likely underpin the metamorphosis process observed when symbionts enter a host cell were up-regulated. Conversely, many downregulated genes appear to be indicative of the protective and confined nature of the symbiosome. Our results emphasize the significance of transmembrane transport to the symbiosis, and in particular of ammonium and sugar transport. Further, we pinpoint and characterize candidate transporters-predicted to be localized variously to the algal plasma membrane, the host plasma membrane, and the symbiosome membrane-that likely serve pivotal roles in the interchange of material during symbiosis.Our study provides new insights that expand our understanding of the molecular exchanges that underpin the cnidarian-algal symbiotic relationship. K E Y W O R D S Breviolum minutum, Exaiptasia diaphana, free-living, in hospite, symbiosis, transporters S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section. How to cite this article: Maor-Landaw K, van Oppen MJH, McFadden GI. Symbiotic lifestyle triggers drastic changes in the gene expression of the algal endosymbiont Breviolum minutum (Symbiodiniaceae).

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Section: Gene Expression Patterns Of Symbiodiniaceae Reflect In Hosmentioning

confidence: 82%

Symbiotic lifestyle triggers drastic changes in the gene expression of the algal endosymbiont Breviolum minutum (Symbiodiniaceae)

Maor-Landaw

Oppen

McFadden

2019

Ecology and Evolution

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“…Surface-active charged impurities are also a possible cause of surface electrification [26,190,212]. Needless to say, intentionally added ionic surfactants behave as an impurity [169].…”

Section: Organic Ions and Ionic Impuritiesmentioning

confidence: 99%

Electrification of water interface

Uematsu

2021

Preprint

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The surface charge of a water interface determines many fundamental processes in physical chemistry and interface science, and it has been intensively studied for over a hundred years. We summarize experimental methods to characterize the surface charge densities developed so far: electrokinetics, double-layer force measurements, potentiometric titration, surface-sensitive nonlinear spectroscopy, and surface-sensitive mass spectrometry. Then, we elucidate physical ion adsorption and chemical electrification as examples of electrification mechanisms. In the end, novel effects on surface electrification are discussed in detail. We believe that this clear overview of state of the art in a charged water interface will surely help the fundamental progress of physics and chemistry at interfaces in the future.

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“…The intrinsic pH value of the deionized (DI) water is in the range of 5.6 ≤ pH ≤ 6 (in most cases pH ≈ 5.8) [44]. This is due to the dissolved carbon dioxide (CO 2 ) from the air.…”

Section: Speciation Analysis Of the Deioniozed (Di) Watermentioning

confidence: 99%

“…We used Equation (A22) to calculate the entropy of the ions in the bulk and Equation (A23) to calculate the entropy of the ions on the air/water interface. We took the values of ν for the different ions from the speciation analysis conducted in Reference [44]. To calculate the value of S (2D) , one needs to know the adsorption Γ of each ion.…”

Section: Conflicts Of Interestmentioning

confidence: 99%

The Law of Parsimony and the Negative Charge of the Bubbles

Karakashev

Grozev

2020

Coatings

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Why the bubbles are negatively charged? This is almost 100 years old question, which many scientists have striven and still are striving to answer using the latest developments of the MD simulations and various physical analytical methods. We scrutinize with this paper the basic literature on this topic and conduct our own analysis. Following the philosophical law of parsimony: “Entities should not be multiplied without necessity”, we assume that the simplest explanation is the right one. It is well known that the negative change of the Gibbs free energy is a solid criterion for spontaneous process. Hence, we calculated the energies of adsorption of OH−, H3O+ and HCO3− ions on the air/water interface using the latest theoretical developments on the dispersion interaction of inorganic ions with the air/water interface. Thus, we established that the adsorption of OH− and HCO3− ions is energetically favorable, while the adsorption of H3O+ is energetically unfavorable. Moreover, we calculated the change of the entropy of these ions upon their transfer from the bulk to the air/water interface. Using the well-known formula ΔG = ΔH − TΔS, we established that the adsorption of OH− and HCO3− ions on the air/water interface decreases their Gibbs free energy. On the contrary, the adsorption of H3O+ ions on the air/water interface increases their Gibbs free energy. Thus, we established that both OH- and HCO3− ions adsorb on the air/water interface, while the H3O+ ions are repelled by the latter. Therefore, electrical double layer (EDL) is formed at the surface of the bubble–negatively charged adsorption layer of OH− and HCO3− ions and positively charged diffuse layer of H3O+ ions.

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On the stability of thin films of pure water

Cited by 20 publications

References 40 publications

Symbiotic lifestyle triggers drastic changes in the gene expression of the algal endosymbiont Breviolum minutum (Symbiodiniaceae)

Symbiotic lifestyle triggers drastic changes in the gene expression of the algal endosymbiont Breviolum minutum (Symbiodiniaceae)

Electrification of water interface

The Law of Parsimony and the Negative Charge of the Bubbles

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