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LabXchange
United States
เข้าร่วมเมื่อ 4 ธ.ค. 2018
LabXchange is a global science classroom open to every curious mind.
Created at Harvard University with support from the Amgen Foundation, this powerful digital tool makes high-quality science education accessible and gives learners and educators, everywhere, the courage to chart a meaningful path in science-for free.
Created at Harvard University with support from the Amgen Foundation, this powerful digital tool makes high-quality science education accessible and gives learners and educators, everywhere, the courage to chart a meaningful path in science-for free.
Evaluating the Opportunity Gap
What is the “opportunity gap” and is it a more appropriate concept than the “achievement gap” in STEM education? In this video, Dr. Jamiella Brooks and Dr. Ivory Toldson respond to these questions. Dr. Brooks and Dr. Toldson are faculty steering committee members on LabXchange’s Racial Diversity, Equity, and Inclusion in Science Education project.
View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:b9827ca3:video:1
View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:b9827ca3:video:1
มุมมอง: 4
วีดีโอ
A Scientific Journey: Tyler Bellenfant - Data Scientist at Amgen, Process Development
มุมมอง 1319 ชั่วโมงที่ผ่านมา
Tyler Bellenfant shares valuable advice for aspiring scientists. View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:dc4ce2f8:video:1
A Scientific Journey: Thomas Pearson - Principal Engineer at Amgen, Operations
มุมมอง 26วันที่ผ่านมา
Thomas Pearson tells us about who inspired him to become a scientist and engineer. View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:115f8283:video:1
Global Warming and the Greenhouse Effect
มุมมอง 96วันที่ผ่านมา
Ever wondered why our planet is getting hotter? This video explains the greenhouse effect, highlighting the importance of greenhouse gases. Discover the serious consequences of rising temperatures and learn how data science is helping us to understand and address climate change. View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:253b2699:video:1
A Scientific Journey: Andrew Holland - Director at Amgen, Precision Oncology
มุมมอง 56วันที่ผ่านมา
Andrew Holland tells us how his curiosity about the world and its inner workings led him to a career in science. View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:90cf37b3:video:1
A Scientific Journey: Rene Hubert - Director at Amgen, Therapeutic Discovery
มุมมอง 31วันที่ผ่านมา
Rene Hubert tells us about what inspired him to become a scientist and his favorite “aha moment” in his scientific career. View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:c0a9d459:video:1
A Scientific Journey: Raul Lazaro - Senior Associate Scientist at Amgen, R&D Oncology
มุมมอง 2714 วันที่ผ่านมา
Raul Lazaro tells us about what inspired him to become a scientist and the challenges he’s faced in his career. View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:b4dfdb02:video:1
Structure of the Chromatin Fiber
มุมมอง 9014 วันที่ผ่านมา
This video explains the structure of chromatin fiber, highlighting the roles of structural proteins and histones in DNA packaging within the cell nucleus. It details the formation of nucleosomes and the involvement of histone H1 in chromatin compaction. View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:a116320d:video:1
Bacteriophage T4: Recombination Assay
มุมมอง 104หลายเดือนก่อน
This video discusses recombination assays with bacteriophages, addressing the challenge of their haploid nature by aiming for recombination between 2 different replicase mutants within a single bacterium. The frequency of recombination is calculated based on the ratio of recombinant to total progeny, with Seymour Benzer's work highlighting the importance of bacterial strain differences in detec...
Correspondence Between One Gene and One Protein
มุมมอง 67หลายเดือนก่อน
It is widely accepted that there is a functional correspondence between a gene and a protein. The study of hereditary diseases like alkaptonuria and phenylketonuria, along with auxotrophic mutants in Neurospora crassa, provides evidence to support the one gene-one protein hypothesis. This evidence reveals a direct correlation between gene mutations and the synthesis of inactive enzymes, which u...
Integrating Inclusive Teaching Strategies into STEM Classrooms
มุมมอง 38หลายเดือนก่อน
In this webinar, we discuss the latest content from LabXchange’s RDEISE project, Advancing Equity in STEM through Inclusive Teaching. STEM educators must be equipped with inclusive teaching strategies in order to foster diversity and create a culture of inclusion in science. LabXchange Outreach & Communications Manager Ilyana Sawka is joined by LabXchange Teachers in Residence Fayola Garner and...
Chromosomes are Linear Arrays of Genes
มุมมอง 88หลายเดือนก่อน
We’ll demonstrate that chromosomes are linear arrays of genes, using genetic studies on Drosophila melanogaster (fruit fly) that were conducted by Thomas Morgan and his research group. The experiments reveal that genes on the same chromosome are linked, and that the second law of Mendel, related to independent segregation, does not hold true for traits that are associated with the same chromoso...
How to: Measure Fruit Fly Chemotaxis Using a Choice Chamber
มุมมอง 73หลายเดือนก่อน
Molly takes us into the lab to measure the chemotaxis response in fruit flies by using a choice chamber and various household substances. Molly also shows us how to analyze the results using a chi-square test. View this video (and more like it) on LabXchange: www.labxchange.org/library/items/lb:LabXchange:6368f6cc:video:1
The Role of DNA
มุมมอง 87หลายเดือนก่อน
DNA is the carrier of genetic information. In this animation, we introduce how pneumococcus transformation and bacteriophage experiments provide key evidence for this. Griffith’s findings demonstrate the transformation of nonpathogenic pneumococcus into pathogenic forms, later identified as DNA. Further experiments by Avery, McLeod, and McCarty, and by Hershey and Chase, confirm DNA’s role in d...
Why Should We Care about Addressing Racism in STEM Education?
มุมมอง 372 หลายเดือนก่อน
Why Should We Care about Addressing Racism in STEM Education?
Visual Inspection of Therapeutic Protein Drug Products
มุมมอง 5652 หลายเดือนก่อน
Visual Inspection of Therapeutic Protein Drug Products
The Role of Drug Product Process Development in Therapeutic Protein Production
มุมมอง 562 หลายเดือนก่อน
The Role of Drug Product Process Development in Therapeutic Protein Production
Structural Correspondence Between One Gene and One Polypeptide
มุมมอง 1012 หลายเดือนก่อน
Structural Correspondence Between One Gene and One Polypeptide
Measuring Transpiration Using a Potometer
มุมมอง 6593 หลายเดือนก่อน
Measuring Transpiration Using a Potometer
Simulation Video Walkthrough - Photosynthesis and Cellular Respiration
มุมมอง 3074 หลายเดือนก่อน
Simulation Video Walkthrough - Photosynthesis and Cellular Respiration
How To: Preparing Sordaria Samples to Measure Crossover Frequency
มุมมอง 3454 หลายเดือนก่อน
How To: Preparing Sordaria Samples to Measure Crossover Frequency
50 Million Strong: 50 Million Minds: 50 Million Futures
มุมมอง 1894 หลายเดือนก่อน
50 Million Strong: 50 Million Minds: 50 Million Futures
How to: Measure Carbon Dioxide in the Atmosphere
มุมมอง 5244 หลายเดือนก่อน
How to: Measure Carbon Dioxide in the Atmosphere
this shows glucose absorption, NOT uptake! 2 different processes.
Hi can we have the name or some example of kits for this extraction
Hi, i'm thinking of using this for my science project on how different wavelengths of light can affect rate of photosynthesis (which im controlling through different colour filters) and I was wondering if you could do this on a batch of spinach disks more than once? Like can I put them in the solution, record how long it takes for them to float to the top, and then put them in the syringe vacuum again to de-oxygen the disks so i can perform the experiment again? I'm wondering this because I'm going to need to test 9 different colour filters, and I hope to have at least 3 different trials for each, so i hope i dont need to go through 27 different batches of 10 disks (270 disks is a lot). And if this is possible, will the rate of photosynthesis slow each trial? Thank you!!
Thank you. As others stated -such a great explanation.
Balsa lipidica nunca pensei em existir
Balsa lipidica nunca pensei em existir
what was the hypo solution's conc. 5% ?
Where can I get non-absorbent cotton?
Non- absorbent cotton is readily available from large e-retailers. For the purposes of this lab, many educators purchase a kit which includes all the necessary materials.
@@LabXchange Thanks. Purchasing a kit is not possible for me at this time. I plan to combine another set up with this one. The use of individual units works better than setting up a series within a larger container. But thanks for your reply!
Wrong and racist
hello may I ask if all the ribosomes in the same polysome carry the same genetic code? or not necessarily?
The ribosomes in a polysome attach to the same mRNA, and translate it one after another. Hope this helps!
This video is one of the best and easiest for beginners to understand. Thank you for creating it.
Stay gold! Yes!
she is so cute
Happy Soul. 😊❤❤
❤❤❤❤
I would like to ask if the number of ribosome attached on m RNA are fixed or it chang according to the position of stop codon
She is so cute😭😭😭 Best explanation ever
That tap water is dangerous
No rna primase in the leading strand?
Not necessary, as DNA is easily replicated in the leading strand from the 5' to 3' direction.
save our lab!!!! herooooo
Its fun to learn
Lord bless ya'll for putting this great effort and every single thing u said its like i memorize by now unlike those boring lab classes, thank you so much.
Excellent explanation. Thanks
Thanks this is exactly what I was looking for
Hi i did a similar experiment in class and we used purple light, white light and no light. Im confused which light should be the most efficient. My experiment showed all the spinach leaves going up with purple light and none with white light. I think there could have been an error with the white light but is purple light more efficient than white light? in my hypothesis i assumed purple light would be most efficient but now I am not sure given some research says white light and others say purple light is most efficient.
Fascinating and helpful as always, LabXchange.
Excelllent video. I will share it with my students!
Can I use malabar nightshade for this experiment?
Malabar spinach can be used for this experiment. We recommend using green shades and leaves that are not too waxy on the surface as the waxy cuticle can make it difficult to extract the gasses from the leaf disks.
How many leaf disks do i need?
5
We recommend about 20 leaf disks per trial.
@@LabXchange oh our teacher told 5
how have i never heard student talking abt this... this is the best splicing clip i found so far
Also if I were to use leaves with red parts, why shouldn’t I cut leaf discs there?
While you could use red portions of the leaves to cut the leaf discs, it is not recommended as the chlorophyll composition may differ from the green parts of the leaf and therefore, this would introduce another extraneous variable into the experiment.
Why can’t we cut the leaves at the big veins?
The structure of the large veins makes it much more challenging to extract gasses via the vacuum mechanism rather than the flatter parts of the leaf. As the plant photosynthesizes, the gas oxygen will be produced within the leaves which will cause the leaf disks to float. Therefore, we are able to visually measure photosynthesis as the amount of floating leaf disks per minute. If we did not extract the gases from the leaves through the use of a vacuum, we would not be able to track oxygen production as a measure of photosynthesis.
But why is it harder extract gasses in areas with large veins?
@@alexisyu8946 Large veins are structured to tunnel gasses and nutrients throughout the leaf and therefore are not as flat as the rest of the leaf. The structure of the large veins makes it much more challenging to extract gasses via the vacuum mechanism rather than the flatter parts of the leaf. Thus, leaf disks cut from veins will typically float. Remember that to visually measure photosynthesis we need to first sink the leaf disks by extracting gasses via the vacuum method and then use the amount of floating leaf disks per minute as a measure of photosynthesis.
Thank you ✅
Such a great video! Very approachable and fun for my 7th-grade students. :)
So glad to hear it!
Why we are creating vaccum?
A vacuum is necessary to extract the gases from the leaves. As the plant photosynthesizes, the gas oxygen will be produced within the leaves which will cause the leaf disks to float. Therefore, we are able to visually measure photosynthesis as the amount of floating leaf disks per minute. If we did not extract the gases from the leaves through the use of a vacuum, we would not be able to track oxygen production as a measure of photosynthesis.
@LabXchange thankyou.
Can we use this video clip in our youtube videos
Yes, of course! Please note that our interface has changed, so please check our Help Center for the latest information about creating a class.
Best demonstration
2:10
🙏
Thank you so much
i oove yyo
can we clone the simulations
Thanks GIRL YOU SAVIN LIVES
Orwellian
OKO
How can I get permission to use clips of this for my science education videos?
Very helpful! I’m doing this experiment tomorrow morning
Molly ❤
Nice video
Thank you so much ma'am for explaining so beautifully!
Nice❤