Improving the Rigor and Consistency of the Thermodynamic Theory for Clathrate Hydrates through Incorporation of Movement of Water Molecules of Hydrate Lattice

Current applications of statistical thermodynamic theories for clathrate hydrates do not incorporate the translational and rotational movement of water molecules of the hydrate lattice,in a rigorous manner. Previous studies have shown that the movement of water molecules has a significant effect on the properties of clathrate hydrates. In this Article, a method is presented to incorporate the effect of water movement with as much rigor as possible. This method is then used to calculate the Langmuir constant of the guest species in a clathrate hydrate. Unlike previous studies on modeling of clathrate hydrate thermodynamics, the method presented in this paper does not regress either the intermolecular potentials or the properties of the empty hydrate from clathrate phase equilibria data. Also the properties of empty hydrate used in the theory do not depend on the nature and composition of the guest molecules. The predicted phase equilibria from the resulting theory are shown to be highly accurate and thermodynamically consistent by comparing them with the phase equilibria computed directly from molecular simulations.

GBNV encoded movement protein (NSm) remodels ER network via C-terminal coiled coil domain

Plant viruses exploit the host machinery for targeting the viral genome-movement protein complex to plasmodesmata (PD). The mechanism by which the non-structural protein m (NSm) of Groundnut bud necrosis virus (GBNV) is targeted to PD was investigated using Agrobacterium mediated transient expression of NSm and its fusion proteins in Nicotiana benthamiana. GFP:NSm formed punctuate structures that colocalized with mCherry:plasmodesmata localized protein la (PDLP la) confirming that GBNV NSm localizes to PD. Unlike in other movement proteins, the C-terminal coiled coil domain of GBNV NSm was shown to be involved in the localization of NSm to PD, as deletion of this domain resulted in the cytoplasmic localization of NSm. Treatment with Brefeldin A demonstrated the role of ER in targeting GFP NSm to PD. Furthermore, mCherry:NSm co-localized with ER-GFP (endoplasmic reticulum targeting peptide (HDEL peptide fused with GFP). Co-expression of NSm with ER-GFP showed that the ER-network was transformed into vesicles indicating that NSm interacts with ER and remodels it. Mutations in the conserved hydrophobic region of NSm (residues 130-138) did not abolish the formation of vesicles. Additionally, the conserved prolines at positions 140 and 142 were found to be essential for targeting the vesicles to the cell membrane. Further, systematic deletion of amino acid residues from N- and C-terminus demonstrated that N-terminal 203 amino acids are dispensable for the vesicle formation. On the other hand, the C-terminal coiled coil domain when expressed alone could also form vesicles. These results suggest that GBNV NSm remodels the ER network by forming vesicles via its interaction through the C-terminal coiled coil domain. Interestingly, NSm interacts with NP in vitro and coexpression of these two proteins in planta resulted in the relocalization of NP to PD and this relocalization was abolished when the N-terminal unfolded region of NSm was deleted. Thus, the NSm interacts with NP via its N-terminal unfolded region and the NSm-NP complex could in turn interact with the ER membrane via the C-terminal coiled coil domain of NSm to form vesicles that are targeted to PD and there by assist the cell to cell movement of the viral genome complex. (C) 2015 Elsevier Inc. All rights reserved.

Experimental Study on Flow and Sediment Movement in Cavity Circulations

This paper reports a flume experiment of flow and sediment movement in a cavity. The flow velocity, sediment concentration and the mechanism of hydraulic sorting in the circulation flow are discussed. The quantity and patterns of sediment deposition in the circulation area are studied as well.

Gust-Induced Movement of Dusts Suspended in Atmosphere

在气固两相流的单向耦合模型框架下,研究大气悬浮沙尘在阵风作用下的运动轨迹及其随大气风速、沙尘粒径的变化,揭示了在Stokes阻力、Saffman力和重力共同作用下,沙尘悬移可能转换为跃移的现象。

Experimental Investigation Of Particle Velocity Distributions In Windblown Sand Movement

With the PDPA (Phase Doppler Particle Analyzer) measurement technology, the probability distributions of particle impact and lift-off velocities on bed surface and the particle velocity distributions at different heights are detected in a wind tunnel. The results show that the probability distribution of impact and lift-off velocities of sand grains can be expressed by a log-normal function, and that of impact and lift-off angles complies with an exponential function. The mean impact angle is between 28 degrees and 39 degrees, and the mean lift-off angle ranges from 30 degrees to 44 degrees. The mean lift-off velocity is 0.81-0.9 times the mean impact velocity. The proportion of backward-impacting particles is 0.05-0.11, and that of backward-entrained particles ranges from 0.04 to 0.13. The probability distribution of particle horizontal velocity at 4 mm height is positive skew, the horizontal velocity of particles at 20 mm height varies widely, and the variation of the particle horizontal velocity at 80 mm height is less than that at 20 mm height. The probability distribution of particle vertical velocity at different heights can be described as a normal function.

Sapientia, 1968, Vol. XXIII, nº 87 (número completo)

Contenido: El irracionalismo en la cultura actual / Octavio N. Derisi – Continuidad de la materia / J. E. Bolzán – Notas sobre la creatio de nihilo en Juan Escoto Eriúgena (primera parte) / Gustavo A. Piemonte – Notas y comentarios -- Bibliografía

Sapientia, 1968, Vol. XXIII, nº 88 (número completo)

Contenido: Imposibilidad de la Teología sin la Filosofía / Octavio N. Derisi – Santo Tomás de Aquino y nuestra situación intelectual / Adolfo Muñoz Alonso – Dinámica de la integración material / J. E. Bolzán – Notas sobre la creatio de nihilo en Juan Escoto Eriúgena (conclusión) / Gustavo A. Piemonte – Notas y comentarios -- Bibliografía

Mons. Enrique Angelelli, obispo de La Rioja (1968-1976) : recepción diocesana de su muerte: testimonios y valoraciones

Resumen: Este aporte intenta lograr una mirada sincrónica de la tragedia que se llevó de este mundo a Mons. Enrique Angelelli. La trama humana en su conjunto se desarrolla entre tristezas y alegrías y, también, lógicamente, la historia de la Iglesia posee los mismos condimentos. Pero, la clave está en la luz con la cual miramos estos acontecimientos que, en este caso, no sólo será científica o meramente sociológica sino, fundamentalmente, teológica. Así, al recoger los testimonios del pueblo de Dios, presentamos un hecho histórico reflejado a través del prisma de la fe.

Teología, 1968, Tomo VI nº 013 (número completo)

Presentación / Juan F. Radrizzani -- Interpretación cristiana de los signos de los tiempos en América Latina / Eduardo F. Pironio -- Eucaristía y vida cotidiana / Lucio Gera -- El diálogo y la Verdad / Eduardo Briancesco -- La Iglesia: de los Hechos de los Apóstoles al Vaticano II / Féliz Casa -- Posibilidades de aplicar la “capacidad creadora” al Plan de Pastoral / Justino O´Farrell -- La consagración episcopal de Medrano en el Brasil (1830) / Américo Tonda -- Instauración del diaconado permanente en América Latina / Carmelo J. Giaquinta -- Primera Semana nacional de Teología Estanislao Karlic -- Crónica de la Facultad de Teología -- Notas bibliográficas -- Libros recibidos

Sapientia, 1968, Vol. XXIII, nº 89 (número completo)

Contenido: Espíritu y esquematismo / Octavio N. Derisi – Preeminencia del individuo-especie total / J. E. Bolzán – La división de los conceptos en la lógica formal / Augusto Furlán – Notas y comentarios -- Bibliografía

Sapientia, 1968, Vol. XXIII, nº 90 (número completo)

Contenido: La ubicación de la inteligencia / Octavio N. Derisi – La libertad en la filosofía de la integralidad / Alberto Caturelli – Conocimiento y ser / José I. Alcorta – Notas y comentarios -- Bibliografía