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JoVE Science Education

General Laboratory Techniques

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Basic Methods in Cellular and Molecular Biology

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Model Organisms I

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 JoVE Bioengineering

Characterization Of Multi-layered Fish Scales (Atractosteus spatula) Using Nanoindentation, X-ray CT, FTIR, and SEM

1Geotechnical and Structures Laboratory, U.S. Army Engineer Research and Development Center, 2Department of Mechanical Engineering, University of Alabama, 3Environmental Laboratory, U.S. Army Engineer Research and Development Center


JoVE 51535

This paper presents the methods used for probing spatially correlated chemical, structural, and mechanical properties of the multilayered scale of Atractosteus spatula (A. spatula) using nanoindentation, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and X-ray computed tomography (X-ray CT). The experimental results have been used to investigate the design principles of protective biological materials.

 JoVE Biology

Scale-Up of Mammalian Cell Culture using a New Multilayered Flask

1BD Biosciences


JoVE 3418

Cells play an instrumental and increasing role in research, and the discovery and development of new therapeutics. With this increasing need for greater number of cells we need more efficient and effective ways for growing and harvesting attachment dependent cells. A Multilayered flask with the right features can serve this purpose.

 JoVE Bioengineering

Tri-layered Electrospinning to Mimic Native Arterial Architecture using Polycaprolactone, Elastin, and Collagen: A Preliminary Study

1Department of Biomedical Engineering, Virginia Commonwealth University, 2Department of Anatomy and Neurobiology, Virginia Commonwealth University, 3Department of Cardiovascular Surgery, University Hospital of Geneva


JoVE 2084

The aim of this study was to mimic the native three layered architecture of the arterial wall. To accomplish this, electrospinning was employed with the use of a 3-1 (input-output) nozzle and blends of polycaprolactone, elastin, and collagen.

 JoVE Bioengineering

Engineering a Bilayered Hydrogel to Control ASC Differentiation

1Department of Extremity Trauma Research and Regenerative Medicine, United States Army Institute of Surgical Research, 2Department of Biomedical Engineering, The University of Texas at Austin


JoVE 3953

This protocol focuses on utilizing the inherent ability of stem cells to take cue from their surrounding extracellular matrix and be induced to differentiate into multiple phenotypes. This methods manuscript extends our description and characterization of a model utilizing a bilayered hydrogel, composed of PEG-fibrin and collagen, to simultaneously co-differentiate adipose-derived stem cells1.

 JoVE Immunology and Infection

Printing Thermoresponsive Reverse Molds for the Creation of Patterned Two-component Hydrogels for 3D Cell Culture

1Department of Health Science & Technology, Cartilage Engineering & Regeneration, 2Biomaterials Department, Innovent e.V.


JoVE 50632

A bioprinter was used to create patterned hydrogels based on a sacrificial mold. The poloxamer mold was backfilled with a second hydrogel and then eluted, leaving voids which were filled with a third hydrogel. This method uses fast elution and good printability of poloxamer to generate complex architectures from biopolymers.

 JoVE Applied Physics

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

1Mechanical Engineering Department, Southern Methodist University


JoVE 50199

A high-sensitivity photonic micro sensor was developed for electric field detection. The sensor exploits the optical modes of a dielectric sphere. Changes in the external electric field perturb the sphere morphology leading to shifts in its optical modes. The electric field strength is measured by monitoring these optical shifts.

 JoVE Bioengineering

Combination of Microstereolithography and Electrospinning to Produce Membranes Equipped with Niches for Corneal Regeneration

1Department of Materials Science and Engineering, University of Sheffield, 2Department of Chemistry, University of Sheffield, 3L. V. Prasad Eye Institute


JoVE 51826

We report a technique for the fabrication of micropockets within electrospun membranes in which to study cell behavior. Specifically, we describe a combination of microstereolithography and electrospinning for the production of PLGA (Poly(lactide-co-glycolide)) corneal biomaterial devices equipped with microfeatures.

 JoVE Clinical and Translational Medicine

A New Murine Model of Endovascular Aortic Aneurysm Repair

1INSERM U698 Cardiovascular Remodelling, Hôpital X. Bichat, AP-HP, Paris, 2Bio-Ingénierie des Polymères Cardiovasculaires (BPC), Institut Galilée - Université Paris 13, Paris, France, 3Service de Chirurgie Vasculaire, Hôpital Henri Mondor, AP-HP, Université Paris-Est Creteil, 4Ecole de chirurgie de l'assistance publique des hôpitaux de Paris, 5Service de Chirurgie Cardiaque et Vasculaire, Hôpital Européen Georges Pompidou, AP-HP, Université René Descartes


JoVE 50740

Histological and biochemical modifications after aneurysm endograft exclusion are still unclear. We describe a new model of endograft implantation on a murine aneurysm. Through thrombus analysis with and without persistant circulating blood stream interface, and new endovascular biomaterials evaluation, this model will help to better understand endovascular aneurysm exclusion pathobiology.

 JoVE Biology

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

1Department of Environmental Science and Engineering, California Institute of Technology - Caltech


JoVE 197

Jared Leadbetter takes us for a nature walk through the diversity of life resident in the termite hindgut - a microenvironment containing 250 different species found nowhere else on Earth. Jared reveals that the symbiosis exhibited by this system is multi-layered and involves not only a relationship between the termite and its gut inhabitants, but also involves a complex web of symbiosis among the gut microbes themselves.

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