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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.
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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.
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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
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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.
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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.
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Algal cell
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.
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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.
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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.
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VUCast: Vanderbilt is growing, “rocking out” and learning from a movie star!
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The Benefits of an Online Certificate Program from Berklee
Watch a short video with our Student Advisors discussing Berkleemusic's Certificate Programs. These multi-course online programs provide students with: * Solid qualifications and marketable skills for success * 1-3 years of extensive training with Berklee faculty * Berklee-certified credentials for their resumes Learn more at http://bit.ly/cpneZr
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Dartmouth Presidential Lectures: President Kim on taking responsible risks

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Musician Shankar Mahadevan on Taking Risks in Music and in Business
Musician Shankar Mahadevan on Taking Risks in Music and in Business
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Pistachios offer multiple health benefits
Pistachio nuts, eaten as part of a healthy diet, can increase the levels of antioxidants in the blood of adults with high cholesterol, according to Penny Kris-Etherton, Penn State distinguished professor of nutrition, along with an international team of nutritional scientists. Previous research has shown that pistachios also lower lipids and lipoproteins, which benefits heart health.
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Tisha Todorova - Generating a Non-Tumorigenic Neurally Differentiated Stem Cell Lineage in Vitro
Tisha discusses her work in stem cell research
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Economic Impact of NBA All-Star Game 'hugely inflated'
SMU Business Professor Mike Davis provided expertise for a Channel 8 News investigative report on the forecasted economic impact of the recent NBA All-Star Game.
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Prof. Linda Eads: Extending benefits under the Family Leave Act
SMU Law Professor Linda Eads talks about the Labor Department extending some of the benefits allowed under the Family Leave Act to gay and lesbian workers and the separation of powers within the federal government.
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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
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The Benefits of Making Your Applications Accessible
This presentation seeks to help all web developers on campus understand why they should keep accessibility in mind when creating their applications. The panel discussion, moderated by Berkeley CIO Shel Waggener, features IST--Web Applications Manager Bill Allison and College of Letters & Science Director of Computing Tom Holub, two campus IT leaders who have been tireless accessibility advocates. The panel also features Jon Mires, an accessibility expert with the Center for Accessible Technolog
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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
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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.
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