"Chromatin is comprised of histones and DNA: 147 base pairs of DNA wraps around the 8 core histones to form the basic chromatin unit, the nucleosome.
The function of chromatin is to efficiently package DNA into a small volume to fit into the nucleus of a cell and protect the DNA structure and sequence. Packaging DNA into chromatin allows for mitosis and meiosis, prevents chromosome breakage and controls gene expression and DNA replication.
Heterochromatin is a tightly packed form of chromatin that can silence gene transcription. Heterochromatin constitutes telomeres, pericentric regions and areas rich in repetitive sequences. Euchromatin is less condensed and contains most actively transcribed genes.
Certain proteins – including histones, chromatin interacting proteins such as transcription factors and the DNA repair machinery – play a role in shaping chromatin structure.
Chromatin remodeling complexes can change chromatin architecture by modulating the interaction between nucleosomes and DNA, often by adding post-translational modifications to histones."
#phd#phdstudent#fitness then #science#biology#research#chromatin#researcher#molecularbiology#dna#genetics#epigenetics#sundayfunday
2018 was an outstanding year, yet 2019 is already following with nothing but further progress. Received an acceptance into graduate school at Illinois Institute of Technology in Chicago and will be pursuing my masters in analytical chemistry this year. Additionally, huge things are happening at work so I love the way this year is going so far...
Education and Outreach Principal Investigator and documentary filmmaker Kathy Kasic films the Gravity Corer on the LARS (Launch and Recovery System) Deck.
Kathy was there to document the exciting and even monotonous moments of borehole science operations. The Outreach Team of Kathy Kasic and Billy Collins have their hands full capturing footage and photos for an hour long documentary, two short science films, a museum installation, PBS Learning Media teaching modules, social media posts, and the SALSA website.
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Coliformes fecales en placas petrifilm 3M , gracias a @yerihcamb por su aporte.
Let's talk about the role of sodium and hydration status with regards to bodybuilding.
You often hear bodybuilders talking about how they get this massive carb pump after they have a cheat meal or something like that. The majority of the time it's not necessarily the carbohydrates that fill them out, it's the increased sodium intake in conjunction with the high amounts of water they are likely drinking as is.
The role of sodium in the body it's to help regulate blood volume and blood pressure by allowing water to go into the vascular system. So when somebody is extremely low carbohydrate and they talk about how they still have a pump, it is likely that it is because they are still keeping sodium in water very high.
Let's take Brooke for instance. She doesn't always eat as much sodium as she should and I reminded her to increase sodium intake. The left was without a lot of sodium and not a good pump and the right is with plenty of sodium and a very good pump and you can see the difference. Bear in mind this is just 24 hours difference and you can see that just by manipulating sodium intake, you can change the look of someone.
Why do humans always have to have personal gain in our egos. I cannot understand what goes through the minds of selfish people like this. And just how downright stupid they are. I wish people would wake up one day and realise that humans are not the most important animal on earth 🐋 rant over. @hawaiinewsnow
Tuberculosis prevention and control efforts rely primarily on the vaccination of infants and the detection and appropriate treatment of active cases.The World Health Organization has achieved some success with improved treatment regimens, and a small decrease in case numbers.The US Preventive Services Task Force (USPSTF) recommends screening people who are at high risk for latent tuberculosis with either tuberculin skin tests or interferon-gamma release assays.
The only available vaccine as of 2011 is Bacillus Calmette-Guérin (BCG) In children it decreases the risk of getting the infection by 20% and the risk of infection turning into active disease by nearly 60%. It is the most widely used vaccine worldwide, with more than 90% of all children being vaccinated.The immunity it induces decreases after about ten years. As tuberculosis is uncommon in most of Canada, the United Kingdom, and the United States, BCG is administered to only those people at high risk. Part of the reasoning against the use of the vaccine is that it makes the tuberculin skin test falsely positive, reducing the test's usefulness as a screening tool. A number of new vaccines are currently in development.
The World Health Organization declared TB a "global health emergency" in 1993,and in 2006, the Stop TB Partnership developed a Global Plan to Stop Tuberculosis that aimed to save 14 million lives between its launch and 2015.A number of targets they set were not achieved by 2015, mostly due to the increase in HIV-associated tuberculosis and the emergence of multiple drug-resistant tuberculosis. A tuberculosis classification system developed by the American Thoracic Society is used primarily in public health programs.(On the photo-Tuberculosis prevention poster from the United States, c. 1940)
One of the cuttings that I’ve been most excited about! I’ll tell you all about it soon, but which one of you guys can already guess which plant sprouted here? 😃🌱
Een van de stekjes waar ik het meest enthousiast over ben! Ik vertel jullie er snel meer over, maar wie van jullie kan nu al raden welke plant hier in een mini-formaat te zien is? 😃🌱
Toda a maravilha de um órgão extraordinário. O coração de um jovem saudável, entre 15 e 20 anos, costuma bater no mínimo 60 e no máximo 90 vezes por minuto. Mas se esporadicamente sua frequência cardíaca ultrapassa ou cai abaixo de tal faixa, isso não quer dizer que você tem algum tipo de doença. “O coração está ligado ao cérebro e ao corpo por estímulos nervosos e são eles que dizem o quanto ele precisa trabalhar”, afirma o cardiologista Antônio Carlos Carvalho, da Unifesp.
Em algumas pessoas, o nervo simpático (que libera adrenalina) atua com mais força, fazendo com que o indivíduo perceba mais facilmente quando o coração acelera. Em outras pessoas, a atuação do nervo vago (que breca os batimentos) é mais percebida. Basta uma situação que estimule um dos dois nervos e pronto. Quando você está malhando, por exemplo, sua frequência cardíaca pode chegar a 150 ou 160 bpm (batimentos por minuto) sem que isso represente uma ameaça à saúde. Agora imagine que você está no milésimo sono. Deitadão na cama, sem se mexer ou fazer qualquer esforço, seu metabolismo é muito menos intenso e seu cérebro praticamente desliga. Por que seu coração iria disparar? Enquanto dormimos, é normal nossa frequência cardíaca chegar aos 40 bpm, também sem causar nenhum problema. Afinal você sempre acorda bem no dia seguinte, não?
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^^ very true!!
I already had 2 physics lessons and they went really well!! This week I will meet up with a chemistry tutor to discuss our schedule and then all that is left is biology!! Physics is already a bit hard and it is only going to get harder but... nobody cares. Keep studying!! So many people did that before me , so I can do it as well !!! 💪💪💪