Replication and leakage test of polydimethylsiloxane (PDMS) microfluidics channel

<p>Earh's surface is covered with soil; particulate mixtures subject to cycles of wetting and drying. The role of this transient hydrodynamic forcing in creating and destroying aggregates is virtually unexplored. We examine this process at the grain scale. When a colloidal suspension is dried, capillary pressure may overwhelm repulsive electrostatic forces, assembling aggregates that are out of thermal equilibrium. This poorly understood process confers cohesive strength to many geological and industrial materials. Here we observe evaporation-driven aggregation of natural and synthesized particulates, and then probe their stability under rewetting using a microfluidics channel as a flume to determine the entrainment threshold. We also directly measure bonding strength of aggregates using an atomic force microscope. Cohesion arises at a common length scale (~5 microns), where interparticle attractive forces exceed particle weight. In polydisperse mixtures, smaller particles condense within shrinking capillary bridges to build stabilizing &#8220;solid bridges&#8221; among larger grains. This dynamic repeats across scales forming remarkably strong, hierarchical clusters, whose cohesion derives from grain size rather than mineralogy. Transient capillary pressures are even sufficiently large to sinter the smallest particles together. These results may help to understand the strength and erodibility of natural soils, and other polydisperse particulates that experience transient hydrodynamic forces.</p>

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Electroosmosis modulated biomechanical transport through asymmetric microfluidics channel

Indian Journal of Physics ◽

10.1007/s12648-018-1215-3 ◽

2018 ◽

Vol 92 (10) ◽

pp. 1229-1238 ◽

Cited By ~ 26

Author(s):

R. Jhorar ◽

D. Tripathi ◽

M. M. Bhatti ◽

R. Ellahi

Keyword(s):

Microfluidics Channel

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Air-Tightness/Leakage Test of the Furnace, Air, and Flue Gas Ducts of a Steam Generator

Thermal Power Plant ◽

10.1016/b978-0-08-101112-6.00010-1 ◽

2017 ◽

pp. 211-223

Author(s):

Dipak K. Sarkar

Keyword(s):

Steam Generator ◽

Flue Gas ◽

Leakage Test ◽

Air Tightness

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Formulation and Evaluation of Benzoyl Peroxide Injection

Research Journal of Pharmaceutical Dosage Forms and Technology ◽

10.52711/0975-4377.2021.00035 ◽

2021 ◽

pp. 198-200

Author(s):

Ajay Bedadurge ◽

Mahesh Kadare ◽

Vinod Matole ◽

Parikshit Shirure ◽

Sainath Suryawanshi ◽

...

Keyword(s):

Benzoyl Peroxide ◽

Functional Groups ◽

The Other ◽

Test Results ◽

Methyl Paraben ◽

Propyl Paraben ◽

Sterility Test ◽

Leakage Test ◽

Drug Content ◽

Clear Solution

Objective: The present research has been undertaken for the formulation and evaluation of Benzoyl Peroxide Injection. It is used for Antiacne activity. Methods: Benzoyl peroxide is used as Antiacne. Methyl paraben, Propyl paraben and benzalkoniumchloride were used as preservatives. Water for injection is used as a vehicle. The following parameters were evaluated such as clarity test, leakage test, chearity test, assay and Sterility test. Results: The clearity test shows clear solution. Drug chearity test shows no chear in the vials. Leakage test shows no leakage in the vials. pH and drug content show the F1 batch was better the other batches. IR confirmed that all functional groups are same as benzoyl Peroxide. Conclusion: It was concluded that F1 batch is the good than the other batches. So F1 batch is good for the Parenteral use.

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