Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Gene Conversion

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...

Gene Conversion

Gene Conversion

Conversion of Units

Conversion of Units

Sometimes, there is a need to convert from one unit to another one. For instance, reading a cookbook in which quantities are expressed in units of liters or ounces may require conversion of quantities to cups. Or, when looking up directions on how to get to a location, we may be interested to know how many miles we are going to walk. In this case, we would have to convert units of feet or meters to miles.
The first step in the unit conversion is to list the given units and the units required...

Conversion of Alcohols to Alkyl Halides

Conversion of Alcohols to Alkyl Halides

This lesson delves into the conversion of alcohols to corresponding alkyl halides and the mechanism of action for different reagents. Typically, the hydroxyl group is first protonated to convert it to a stable leaving group. Consequently, based on the starting alcohol, the mechanism undergoes either of the nucleophilic substitution routes, SN1 or SN2. Tertiary alkyl halides are made using the two-step SN1 mechanism that occurs via a carbocation intermediate, which is stabilized by...

Amyloid Fibrils

Amyloid Fibrils

Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...

Dimensional Analysis

Dimensional Analysis

Dimensional analysis, also known as the factor label method, is a versatile approach for mathematical operations. The main principle behind this approach is: the units of quantities must be subjected to the same mathematical operations as their associated numbers. This method can be applied to computations ranging from simple unit conversions to more complex and multi-step calculations involving several different quantities and their units.
Conversion Factors and Dimensional Analysis
The unit...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Curvature tuning in areas V2 and V4 of the developing macaque.

bioRxiv : the preprint server for biology·2026

Same author

An image-computable spatio-chromatic receptive field model of the midget retinal ganglion cell mosaic across the retina.

Journal of computational neuroscience·2026

Same author

A deep convolutional neural network trained for lightness constancy is susceptible to lightness illusions.

Journal of vision·2026

Same author

The Cone Optoretinogram as a Function of Retinal Eccentricity.

Photonics·2026

Same author

Deep neural networks trained for estimating reflectance and illumination achieve lightness constancy differently than human observers.

Journal of vision·2026

Same author

Modeling spectroradiometric measurements of oral mucosal tissue autofluorescence.

Biomedical optics express·2026

Search research articles

Related Experiment Video

Updated: Jan 22, 2026

One-pot Microwave-assisted Conversion of Anomeric Nitrate-esters to Trichloroacetimidates

One-pot Microwave-assisted Conversion of Anomeric Nitrate-esters to Trichloroacetimidates

Published on: January 15, 2018

A Conversation with Jacob Nachmias.

Jacob Nachmias¹, J Anthony Movshon², Brian A Wandell³

¹Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

Annual Review of Vision Science

|July 9, 2019

Summary

This summary is machine-generated.

Professor Jacob Nachmias, a pioneer in vision science, significantly advanced our understanding of visual perception through his work on eye movements and psychophysical methods. His research established foundational principles in visual channel characterization.

Keywords:

autobiography eye movements psychophysics signal detection theory spatial frequency channels vision

More Related Videos

Assessing Transmissible Spongiform Encephalopathy Species Barriers with an In Vitro Prion Protein Conversion Assay

Assessing Transmissible Spongiform Encephalopathy Species Barriers with an In Vitro Prion Protein Conversion Assay

Published on: March 10, 2015

In vitro Modeling for Neurological Diseases using Direct Conversion from Fibroblasts to Neuronal Progenitor Cells and Differentiation into Astrocytes

In vitro Modeling for Neurological Diseases using Direct Conversion from Fibroblasts to Neuronal Progenitor Cells and Differentiation into Astrocytes

Published on: June 10, 2021

Related Experiment Videos

Last Updated: Jan 22, 2026

One-pot Microwave-assisted Conversion of Anomeric Nitrate-esters to Trichloroacetimidates

One-pot Microwave-assisted Conversion of Anomeric Nitrate-esters to Trichloroacetimidates

Published on: January 15, 2018

Assessing Transmissible Spongiform Encephalopathy Species Barriers with an In Vitro Prion Protein Conversion Assay

Assessing Transmissible Spongiform Encephalopathy Species Barriers with an In Vitro Prion Protein Conversion Assay

Published on: March 10, 2015

In vitro Modeling for Neurological Diseases using Direct Conversion from Fibroblasts to Neuronal Progenitor Cells and Differentiation into Astrocytes

In vitro Modeling for Neurological Diseases using Direct Conversion from Fibroblasts to Neuronal Progenitor Cells and Differentiation into Astrocytes

Published on: June 10, 2021

Area of Science:

Psychology
Neuroscience
Vision Science

Background:

Professor Jacob Nachmias (1928-2019) was a distinguished figure in psychology and vision science.
He earned his PhD from Harvard University and held a professorship at the University of Pennsylvania.
His early life included immigrating to the US to escape Nazi persecution.

Discussion:

Nachmias' research fundamentally advanced the understanding of human vision.
His work spanned critical areas including eye movements and visual perception.
He developed and applied signal detection theory and forced-choice psychophysical methods.

Key Insights:

Pioneered the psychophysical characterization of spatial-frequency-selective visual channels.
His studies on eye movements provided crucial insights into visual processing.
Advanced the application of signal detection theory in psychophysics.

Outlook:

Nachmias' contributions continue to influence contemporary vision research.
His methodologies remain foundational in psychophysical studies.
His legacy is cemented by his election to the National Academy of Sciences and the Tillyer Award.