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Showing 1 to 12 of 384 entries
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Visualization of dislocation dynamics in colloidal crystals

Computer and Information Science and Engineering Minority-Serving Institutions Research Expansion Program AND Program Evaluation

Cohen I, Schall P, Weitz DA.
GSID: fncaUMA2eM4J
P Schall, I Cohen, DA Weitz, F Spaepen - Science, 2004 - science.org

The dominant mechanism for creating large irreversible strain in atomic crystals is the motion of dislocations, a class of line defects in the crystalline lattice. Here we show that the motion of dislocations can also be observed in strained...

The Use of Advanced Mass Spectrometry to Dissect the Life-Cycle of Photosystem II.

Frontiers in plant science

Weisz DA, Gross ML, Pakrasi HB.
PMID: 27242823
Front Plant Sci. 2016 May 10;7:617. doi: 10.3389/fpls.2016.00617. eCollection 2016.

Photosystem II (PSII) is a photosynthetic membrane-protein complex that undergoes an intricate, tightly regulated cycle of assembly, damage, and repair. The available crystal structures of cyanobacterial PSII are an essential foundation for understanding PSII function, but nonetheless provide a...

Scalable single-step microfluidic production of single-core double emulsions with ultra-thin shells.

Lab on a chip

Arriaga LR, Amstad E, Weitz DA.
PMID: 26152396
Lab Chip. 2015 Aug 21;15(16):3335-40. doi: 10.1039/c5lc00631g.

We report a versatile and robust device for the continuous production of double emulsion drops with very thin shell thicknesses, of about 5% of the radius: for emulsions 50 μm in radius the shells can be as thin as...

Sensitive and predictable separation of microfluidic droplets by size using in-line passive filter.

Biomicrofluidics

Ding R, Ung WL, Heyman JA, Weitz DA.
PMID: 28344725
Biomicrofluidics. 2017 Feb 21;11(1):014114. doi: 10.1063/1.4976723. eCollection 2017 Jan.

Active manipulation of droplets is crucial in droplet microfluidics. However, droplet polydispersity decreases the accuracy of active manipulation. We develop a microfluidic "droplet filter" that accurately separates droplets by size. The droplet filter has a sharp size cutoff and...

Polyurea microcapsules in microfluidics: surfactant control of soft membranes.

Langmuir : the ACS journal of surfaces and colloids

Polenz I, Weitz DA, Baret JC.
PMID: 25531127
Langmuir. 2015 Jan 27;31(3):1127-34. doi: 10.1021/la5040189. Epub 2015 Jan 13.

Interfacial polymerization techniques offer a versatile route for microcapsule synthesis. We designed a microfluidic process to synthesize monodisperse polyurea microcapsules (PUMCs); the microcapsules are formed by an interfacial polymerization of isocyanate dissolved in the oil and an amine dissolved...

Light-directing omnidirectional circularly polarized reflection from liquid-crystal droplets.

Angewandte Chemie (International ed. in English)

Fan J, Li Y, Bisoyi HK, Zola RS, Yang DK, Bunning TJ, Weitz DA, Li Q.
PMID: 25487252
Angew Chem Int Ed Engl. 2015 Feb 09;54(7):2160-4. doi: 10.1002/anie.201410788. Epub 2014 Dec 08.

Constructing and tuning self-organized three-dimensional (3D) superstructures with tailored functionality is crucial in the nanofabrication of smart molecular devices. Herein we fabricate a self-organized, phototunable 3D photonic superstructure from monodisperse droplets of one-dimensional cholesteric liquid crystal (CLC) containing a...

Robust scalable high throughput production of monodisperse drops.

Lab on a chip

Amstad E, Chemama M, Eggersdorfer M, Arriaga LR, Brenner MP, Weitz DA.
PMID: 27714028
Lab Chip. 2016 Oct 18;16(21):4163-4172. doi: 10.1039/c6lc01075j.

Monodisperse drops with diameters between 20 μm and 200 μm can be used to produce particles or capsules for many applications such as for cosmetics, food, and biotechnology. Drops composed of low viscosity fluids can be conveniently made using...

Combined effects of heat shock, smoke and darkness on germination of Epacris stuartii Stapf., an endangered fire-prone Australian shrub.

Oecologia

Keith DA.
PMID: 28307482
Oecologia. 1997 Oct;112(3):340-344. doi: 10.1007/s004420050318.

Epacris stuartii (Epacridaceae) is an endangered heathland shrub in which seedling recruitment occurs almost exclusively after fire. Seed viability and multiple seed dormancy mechanisms were examined to explore why levels of seedling recruitment were low after some fires, despite...

Encapsulation and Enhanced Retention of Fragrance in Polymer Microcapsules.

ACS applied materials & interfaces

Lee H, Choi CH, Abbaspourrad A, Wesner C, Caggioni M, Zhu T, Weitz DA.
PMID: 26799189
ACS Appl Mater Interfaces. 2016 Feb 17;8(6):4007-13. doi: 10.1021/acsami.5b11351. Epub 2016 Feb 04.

Fragrances are amphiphilic and highly volatile, all of which makes them a challenging cargo to efficiently encapsulate and retain in microcapsules using traditional approaches. We address these limitations by introducing a new strategy that combines bulk and microfluidic emulsification:...

Taurine and vitamin E supplementations have minimal effects on body composition, hepatic lipids, and blood hormone and metabolite concentrations in healthy Sprague Dawley rats.

Nutrition and dietary supplements

Allen PS, Brown AW, Brown MM, Hsu WH, Beitz DC.
PMID: 26752960
Nutr Diet Suppl. 2015;7:77-85. doi: 10.2147/NDS.S88888. Epub 2015 Oct 20.

BACKGROUND: As prescriptions for off-label pharmaceutical use and autonomous administration of over-the-counter nutraceuticals become mainstream, thorough assessments of these compounds are warranted.OBJECTIVE: To determine the effects of gemfibrozil, rosiglitazone, metformin, taurine, and vitamin E on body composition, hepatic lipids,...

Running home .

Journal of general internal medicine

Keitz SA.
PMID: 10417609
J Gen Intern Med. 1999 Jul;14(7):456-8. doi: 10.1046/j.1525-1497.1999.03019.x.

No abstract available.

Separation and Quantification of Bovine Milk Proteins by Reversed-Phase High-Performance Liquid Chromatography.

Journal of agricultural and food chemistry

Bobe G, Beitz DC, Freeman AE, Lindberg GL.
PMID: 10554263
J Agric Food Chem. 1998 Feb 16;46(2):458-463. doi: 10.1021/jf970499p.

Current analytical methods for milk proteins lack the capacity to simultaneously separate and quantify the six major bovine milk proteins and their genetic variants. A method is described that simultaneously separates and quantifies the six major bovine milk proteins....

Showing 1 to 12 of 384 entries