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Lens, Crystalline: A transparent, biconvex structure of the Eye, enclosed in a capsule and situated behind the Iris and in front of the vitreous humor (Vitreous body). It is slightly overlapped at its margin by the ciliary processes. Adaptation by the Ciliary body is crucial for Ocular accommodation.
 JoVE In-Press

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

1Jülich Centre for Neutron Science Outstation at MLZ, Forschungszentrum Jülich GmbH, 2Department of Chemistry, Louisiana State University, 3Jülich Centre for Neutron Science JCNS-1 & Institute of Complex Systems ICS-1, Forschungszentrum Jülich GmbH, 4Central Institute of Engineering, Electronics and Analytics — Electronic Systems (ZEA-2), Forschungszentrum Jülich GmbH, 5Central Institute of Engineering, Electronics and Analytics — Engineering and Technology (ZEA-1), Forschungszentrum Jülich GmbH

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JoVE 54639

 Science Education: Essentials of Earth Science

Physical Properties Of Minerals I: Crystals and Cleavage

JoVE Science Education

Source: Laboratory of Alan Lester - University of Colorado Boulder

The physical properties of minerals comprise various measurable and discernible attributes, including color, streak, magnetic properties, hardness, crystal growth form, and crystal cleavage. Each of these properties are mineral-specific, and they are fundamentally related to a particular mineral’s chemical make-up and atomic structure. This experiment examines two properties that stem primarily from symmetric repetition of fundamental, structural atomic groupings, called unit cells, within a crystal lattice, a crystal growth form, and crystal cleavage. Crystal growth form is the macroscopic expression of atomic-level symmetry, generated by the natural growth process of adding unit cells (the molecular building blocks of minerals) to a growing crystal lattice. Zones of rapid unit-cell-addition become the edges between the planar surfaces, i.e. faces, of the crystal. It is important to recognize that rocks are aggregates of mineral grains. Most rocks are polymineralic (multiple kinds of mineral grains) but some are effectively monomineralic (composed of a single mineral). Because rocks are combinations of minerals, rocks are not referred to as having crystal form. In some cases, geologists refer to rocks as having a general cleavage, but here the term is simply used

 JoVE In-Press

Experimental Multiscale Methodology for Predicting Material Fouling Resistance

1Department of Mechanical Engineering, Massachusetts Institute of Technology, 2Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, 3Department of Mechanical Engineering, University of Arkansas, 4Department of Materials Science and Engineering, Massachusetts Institute of Technology

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JoVE 52952

 JoVE In-Press

Experimental Approach for Determining Semiconductor/liquid Junction Energetics by Operando Ambient-Pressure X-ray Photoelectron Spectroscopy

1Division of Chemistry and Chemical Engineering, California Institute of Technology, 2Joint Center for Artificial Photosynthesis, California Institute of Technology, 3Advanced Light Source, Lawrence Berkeley National Laboratory, 4Beckman Institute, California Institute of Technology

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JoVE 54129

 JoVE Bioengineering

Planar and Three-Dimensional Printing of Conductive Inks

1Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 2Center for Micro- and Nanotechnology, Lawrence Livermore National Laboratory, 3Presently at the Interdisciplinary Center for Wide Band-gap Semiconductors, University Of California Santa Barbara


JoVE 3189

 JoVE Bioengineering

Manufacturing Of Robust Natural Fiber Preforms Utilizing Bacterial Cellulose as Binder

1Polymer and Composite Engineering (PaCE) Group, Institute of Materials Chemistry and Research, University of Vienna, 2Department of Chemical Engineering, University College London, 3Polymer and Composite Engineering (PaCE) Group, Department of Chemical Engineering, Imperial College London


JoVE 51432

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 JoVE Bioengineering

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

1The School of Plant Sciences, University of Arizona, 2Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, 3The Institute for Sustainable and Renewable Resources, The Institute for Advanced Learning and Research, 4Department of Plant, Soil and Microbial Sciences, Michigan State University


JoVE 51340

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