521. Physical analysis and clinical evaluation of high concentration Barium suspension (BARICON-MEAL200w/v%) with low viscosity

Purpose This paper aims to experimentally investigate the film-forming capability of base oils containing poly-methacrylate (PMA) and poly-isobutene (PIB), in a point contact under pure rolling. Design/methodology/approach By using the relative light intensity method, the film thickness is calculated from the interferometer images which are captured by multiple-contact optical elastohydrodynamic lubricated test rig. Findings The test results reveal that polymers, both PMA and PIB, have a significant contribution to the film-forming capability of base oils and the film thickness increases with concentration. The forming-film capabilities for PMA and PIB in base oils are similar at low concentration, while PIB gives a higher film thickness than PMA at high concentration. Shear-thinning phenomenon are observed in all polymer-based oils. Originality/value The polymer usually as an additive is added into the low viscosity base oils to improve the properties of lubricant oil. This paper reports the lubricated properties of PMA and PIB with different concentrations in base oils and to evaluate their functional mechanism in a point contact. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2020-0263/

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Comparison of Strategies in Development and Manufacturing of Low Viscosity, Ultra-High Concentration Formulation for IgG1 Antibody

Journal of Pharmaceutical Sciences ◽

10.1016/j.xphs.2020.09.014 ◽

2020 ◽

Vol 109 (12) ◽

pp. 3579-3589

Author(s):

Vaibhav Deokar ◽

Alok Sharma ◽

Rustom Mody ◽

Subrahmanyam M. Volety

Keyword(s):

High Concentration ◽

Igg1 Antibody ◽

Low Viscosity

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Stability analysis of a particle band on the fluid–fluid interface

Journal of Fluid Mechanics ◽

10.1017/jfm.2019.239 ◽

2019 ◽

Vol 869 ◽

Cited By ~ 1

Author(s):

Alireza Hooshanginejad ◽

Benjamin C. Druecke ◽

Sungyon Lee

Keyword(s):

Stability Analysis ◽

Colloidal Particles ◽

Radial Flow ◽

High Viscosity ◽

High Concentration ◽

Stable Suspension ◽

Low Viscosity ◽

Air Interface ◽

Critical Wavelength ◽

Hele Shaw Cell

We present experiments and theory for viscous fingering of a suspension of non-colloidal particles undergoing radial flow in a Hele-Shaw cell. As the suspension displaces air, shear-induced migration causes particles to move faster than the average suspension velocity and to accumulate on the suspension–air interface. The resultant particle accumulation generates a pattern in which low-concentration, low-viscosity suspension displaces high-concentration, high-viscosity suspension and is unstable due to the classic Saffman–Taylor instability mechanism. While the destabilising mechanism is well-understood, what remains unknown is the stabilising mechanism that suppresses fine fingers characteristic of miscible fingering. In this work, we demonstrate how the stable suspension–air interface interacts with the unstable miscible interface to set the critical wavelength. We present a linear stability analysis for the time-dependent radial flow and show that the wavenumber predicted by the analysis is in good agreement with parametric experiments investigating the effect of suspension concentration and gap thickness of the Hele-Shaw cell.

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Quantitative Study of Liver Magnetic Resonance Spectroscopy Quality at 3T Using Body and Phased Array Coils with Physical Analysis and Clinical Evaluation

PLoS ONE ◽

10.1371/journal.pone.0122999 ◽

2015 ◽

Vol 10 (4) ◽

pp. e0122999 ◽

Cited By ~ 2

Author(s):

Li Xu ◽

Shiyong Gu ◽

Qianjin Feng ◽

Changhong Liang ◽

Sherman Xuegang Xin

Keyword(s):

Magnetic Resonance ◽

Magnetic Resonance Spectroscopy ◽

Quantitative Study ◽

Clinical Evaluation ◽

Phased Array ◽

Resonance Spectroscopy ◽

Physical Analysis ◽

Phased Array Coils ◽

Array Coils

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Analysis of residual sludge stored in UASB of a WWT in Petrolina-PE-Brazil

Revista Eletrônica em Gestão Educação e Tecnologia Ambiental ◽

10.5902/2236117040564 ◽

2020 ◽

Vol 24 ◽

pp. 10

Author(s):

Erick De Aquino Santos ◽

Keyla Vitória Marques Xavier ◽

Marcella Vianna Cabral Paiva ◽

Miriam Cleide Cavalcante de Amorim ◽

Michely Correia Diniz

Keyword(s):

Dna Extraction ◽

Waste Water Treatment ◽

Extraction Process ◽

Upflow Anaerobic Sludge Blanket ◽

Anaerobic Sludge ◽

Physical Analysis ◽

High Concentration ◽

Residual Sludge ◽

Anaerobic Sludge Blanket ◽

Solids Analysis

Anaerobic digestion is a process that occurs through microorganisms in an anoxic condition and aims to digest organic matter resulting mainly in biogas. This process is common in wastewater treatment WWTs (Waste Water Treatment), which usually occur in bioreactors. In Brazil the most widespread is the UASB (Upflow Anaerobic Sludge Blanket) reactor due to its temperature conditions, which found in the country an ideal parameter. Archeas make up the microbiota responsible for digestion acting in the final stage of methanogenesis. The studies of these organisms are mainly through metagenomics, because laboratory cultivation is difficult. Therefore, the research aimed to study the physical and molecular parameters of the sludge. Four UASB reactors from WWT Center in Petrolina – Pernambuco- Brazil were evaluated. For the DNA extraction process the adapted protocol was applied, the physical analysis of the solids obeyed the determinations of APHA (2005). DNA extraction was achieved with the modified protocol and demonstrated a high concentration of DNA present in the samples, being the 4 most abundant reactor. Physical quantifications of the solids analysis showed that the values found are in compliance with current standards.

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Volcanology and inflation structures of an extensive basaltic lava flow in the Payenia Volcanic Province, extra-Andean back arc of Argentina

Andean geology ◽

10.5027/andgeov46n2-3180 ◽

2019 ◽

Vol 46 (2) ◽

pp. 279 ◽

Cited By ~ 1

Author(s):

Mauro Ignacio Bernardi ◽

Gustavo Walter Bertotto ◽

Alexis Daniel Ponce ◽

Yuji Orihashi ◽

Hirochika Sumino

Keyword(s):

Lava Flow ◽

Liquid Core ◽

Internal Flow ◽

Middle Pleistocene ◽

High Concentration ◽

Volcanic Province ◽

Low Viscosity ◽

Effusion Rates ◽

Flow Pathways ◽

P Type

The El Puesto lava flow is located in the Payenia Volcanic Province (central-western Argentina), has a length of 70 km and is Middle Pleistocene in age (0.200±0.027 Ma). The flow shows a P-type pahoehoe structure and exhibits several inflation structures, mainly tumuli and also inflation ridges and lava rises. Lava rise pits and radial or annular clefts are common features associated with inflation structures. The gentle slope on which the flow moved (≈0.5°) allowed the lateral coalescence of lobes at the flow front and the development of an external rigid crust that insulated the liquid core. Lava tunnels are frequent and the lava tunnel named “Cueva de Halada” which is located at its medium portion is the best example of a drainage master tube which formed from the cooling of the crust around a stable inflated flow. Tumuli alignments and long inflation ridges reveal the existence of larger tunnels within the flow. Inflation structures may occur in high concentration belts that converge on a single main belt which is assigned to an anastomosed network of internal flow pathways within the main lava body. The development of inflation structures and lava tunnels require low to moderate effusion rates. An average lava supply rate of 1.8x10-4 m3/s and an inflation time of about 15 days were estimated for an average tumulus of this flow. A high and sustained supply of low viscosity lava (η’=1550 - 483 Pa s) was inferred that initially generated a sheet flow of great areal extension. The reduction in effusion rates could then allowed the development of tunnels that carried lava to the distal fronts, generating localized inflation phenomena throughout the lava flow.

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Experience in Low Viscosity Guar-Free Fracturing Fluid Under Samotlor Field Conditions

10.2118/206653-ms ◽

2021 ◽

Author(s):

Alexander Sergeevich Koplik ◽

Semen Sergeevich Kudrya ◽

Denis Alekseevich Zolnikov ◽

Rustam Albertovich Koltsov ◽

Alexey Vasilievich Kovalevskiy

Keyword(s):

Water Flooding ◽

Gelling Agent ◽

High Concentration ◽

Executive Summary ◽

Capital Costs ◽

Fracture Length ◽

Low Viscosity ◽

Lower Viscosity ◽

Leading Position ◽

To Come

Abstract Executive Summary The recently developed Samotlor 2020 campaign includes a requirement to shift the Frac design to synthetic gelling agent (gellant) which would increase production, keep the reservoir clean and also reduce both capital and operational costs for each stage Frac stage (no need to heat up the water, an option to use the well water, no requirement to miniFrac performance, etc.). The key difference between guar-based gels and synthetic gels is a lower viscosity rating that results in a significant increase in the fracture length and an improved ability to transport high concentration of proppant due to its thixotropic properties (the ability of a substance to lower its viscosity as a result of a mechanical impact and grow its viscosity when still). When gel is destroyed throughout the fracture after the Frac is completed the synthetic option allows for a cleaner fracture and helps remove all residual matter from the fracture. Another important consideration is that guar shipments from India make Russian oil vulnerable to price, foreign exchange and availability fluctuations. If guar crops experience a bad year or Indian farmers determine that the market should be refocused on cotton or other areas (i.e. not guar), the guar prices in Russian would likely skyrocket. The authors worked as a team to come up with a list of clear recommendations to develop both new and existing wells for Lower Cretaceous collectors of the Vartovsk and Megion suites such as AV1 (1-2) and BV8(0) to increase production and reduce capital costs. We have determined that Frac fluids based on synthetic modified polyacrylamide start to come to the front and hold a leading position in the area of production stimulation as previously happened to other effective methods such as polymer water flooding, drilling and cementing applications.

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