The reversal of cell differentiation and prospects for cell replacement therapy
The inaugural Anne McLaren Memorial Lecture, "The reversal of cell differentiation and prospects for cell replacement therapy", given by Prof Sir John Gurdon FRS, University of Cambridge, at Lady Margaret Hall, Oxford, on 7 November 2008. Visit http://media.conted.ox.ac.uk/McLaren-2008 to view the full presentation from Professor Sir John Gurdon FRS, including his slides.
Diffusion Across a Sheep Red Blood Cell Membrane
This cell membrane physiology laboratory uses sheep red blood cells to determine: (1) the isotonic and hemolytic molar concentrations of electrolytes and nonelectrolytes, and degree of electrolyte dissociation; (2) the diffusion rate of penetrating molecules of varying size and lipid solubility; and (3) the relationship of molecular size, number of hydroxyl groups, and partition coefficient to diffusion rate. Student research teams then design an experiment using the acquired techniques to deter
Carbon Dioxide Uptake in Plants: A Computer-Aided Experimental System
This exercise introduces students to concepts of photosynthesis at the whole organism level and to computer utilization in biology. Changes in carbon dioxide concentration are measured in environmental chambers using gas analyzers connected to computers. Carbon dioxide changes are graphed in real time as the plants take up CO2. Over a short time, sunflower seedlings show dramatic changes in CO2 uptake when light intensity is altered or color filters are used. Comparison of the resulting graphs w
Cell Fractionation in Tetrahymena
To illustrate cell fractionation, nuclei are isolated from the ciliated protozoan, Tetrahymena thermophila. A table top clinical centrifuge is used for the fractionation steps and the procedure is monitored microscopically using a differential stain. To determine the efficiency of the procedure, cell and nuclear counts are determined with a hemacytometer. To quantify DNA, the Diphenylamine Reaction is carried out and the amount of DNA per nucleus is calculated.
Cell Biology and Cancer
Cancers result when genes required for normal cell function are mutated and the resulting cells undergo other changes ultimately leading to uncontrolled division. This session reveals new information on normal cell function, proto-oncogenes and tumor suppressor genes and their role in the cell cycle, and current research in drug design for specific cancers.
Blue Plants: Transgenic Plants with the GUS Reporter Gene
An investigative laboratory developed for the introductory biology curriculum using transgenic plants is presented in this chapter. The transgenic Arabidopsis plants we use contain the GUS reporter gene under the control of the cor15a gene promoter, which responds to cold stress. Following induction by cold or other environmental signals, the gusA gene will respond by producing the enzyme beta-glucuronidase (GUS). When plant tissue is incubated with the chromogenic substrate X-gluc, those tissue
Web 2.0: Risks for STI/HIV - Opportunities for Prevention
This lecture explores the risks and prevention opportunities presented by the emergence of social networking and internet dating sites. Presented by the Department of Population, Family, and Reproductive Health.
Separation Processes, Spring 2005
General principles of separation by equilibrium and rate processes. Staged cascades. Applications to distillation, absorption, adsorption, and membrane processes. Phase equilibria and role of diffusion. 10.32 will be offered for 6 units starting spring 2004.
This red algal cell (Chlamydomonas nivalis) gives mountain snow packs a red tint. It uses the pollutants in snow as food. It cannot be seen without a microscope.
Abundant green plants on the forest floor
Green plants make their own food by a process called photosynthesis. They also use nutrients and water from the soil to grow. Primary consumers (insects, chipmunks, mice and deer) eat green plants.
A collection of fern plants in a California forest
Ferns are the most diverse group of seedless vascular plants. The leaves are compound and contain many little leaflets. The many leaflets contain spore spots. Ferns have a true root system, unlike the bryophytes.
Musician Shankar Mahadevan on Taking Risks in Music and in Business
Musician Shankar Mahadevan on Taking Risks in Music and in Business
Tisha Todorova - Generating a Non-Tumorigenic Neurally Differentiated Stem Cell Lineage in Vitro
Tisha discusses her work in stem cell research
Regenerative Medicine and Applications of Stem Cell Research
(June 1, 2010) Renee Reijo Pera, Ph.D., and Professor Michael Longaker discuss the future of regenerative medicine and the promise that stem cell research holds for this field. During the final quarter of the Stanford Mini Med School, some of the most timely and important topics in contemporary medicine and the biosciences are addressed. Stanford Mini Med School is a series arranged and directed by Stanford's School of Medicine and presented by the Stanford Continuing Studies program. Sta
Penn GSE Plants "Digital Seeds" in Nicaragua
Researchers from the University of Pennsylvania Graduate School of Education have partnered with Comercial Internacional Exportada S.A., or CISA, a green coffee exporter, to introduce laptop computers and a technology-based curriculum to a rural community school for the children of coffee-farm workers in Nicaragua. This three-year research initiative at the Buenos Aires School has reached its second phase. The project will document how introducing a technology-based curriculum impacts the schoo
Stem Cell Research Presentation
As an institution of higher education learning, Del Mar College is committed to the marketplace of ideas. On June 18, 2010, community advocate Dusty Durrill sponsored a presentation on Stem Cell Research by Dr. Jorge Paz Rodriguez of the Stem Cell Institute in Panama.
Kohn lecture 2010 - Cell cycle control
The growth and reproduction of all living organisms are dependent on the cell cycle, the process which leads to cell division. Uncontrolled division of cells is important for disease particularly cancer. Two events, S-phase and mitosis, are common to all cell cycles and are necessary for the two newly divided cells to receive a full complement of genes. For more information please visit http://www3.imperial.ac.uk/newsandeventspggrp/imperialcollege/eventssummary/event_17-2-2010-12-35-27
02 - The Universal Principle of Risk Management: Pooling and the Hedging of Risks
ECON 252: Financial Markets - Audio - 02 - The Universal Principle of Risk Management: Pooling and the Hedging of Risks - Yale University > YALE UNIVERSITY COURSES > ECON 252: Financial Markets > Audio > 02 - The Universal Principle of Risk Management: Pooling and the Hedging of Risks
Douglas Melton, Harvard University: "Stem Cell Challenges in Biology and Public Policy" - April 10,
Douglas Melton will discuss the biology and public policy challenges surrounding stem cell research. The potential of human embryonic stem cells for understanding human development and finding new therapies will be presented. Dr. Melton is a cell and molecular biologist as well as an advocate of embryonic stem cell research. His research focuses on the developmental biology of the pancreas. One of the primary goals of his work is to understand how human embryonic stem cells differentiate into pa