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A vital fluid Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Blood 20/03/25, 12:02 Last updated: Published: 07/09/23, 10:16 A vital fluid A comprehensive guide to the human blood system and alternatives Human blood Blood is a vital fluid for humans and vertebrates. It transports nutrients, including oxygen, to cells and tissues. Blood is made of different components: red blood cells, white blood cells, platelets and plasma. Red blood cells (also called erythrocytes) contain haemoglobin, which gives blood its red colour. Haemoglobin helps to carry oxygen to the body from the lungs. White blood cells (also called leukocytes) defend the body against infections. Lymphocytes are a type of white blood cell, and the two types are T lymphocytes and B lymphocytes. T lymphocytes target infected cells and regulate the function of other immune cells. B lymphocytes create antibodies, which are proteins that can destroy foreign substances like bacteria and viruses. Platelets (also called thrombocytes) are small cell fragments. They are essential in blood clotting, a process known as coagulation. They also help wounds heal and contribute to the immune response. Plasma is the liquid component in blood, made of water, ions, proteins, nutrients, wastes and gases. Its main role is transporting substances such as blood cells and other nutrients throughout the body. Artificial blood There are two main types of artificial blood: haemoglobin-based oxygen carriers (HBOCs) and perfluorocarbons (PFCs). HBOCs are synthetic solutions designed to carry oxygen. They are usually a smaller size than RBCs. The haemoglobin is modified and covered with carriers to ensure the HBOCs do not break down inside the body. They can be used for blood transfusions that need to be done immediately or when there is too much blood loss. PFCs are derived from fluorine-containing and carbon-containing chemicals. They have a high capacity for carrying and delivering oxygen. Advantages and disadvantages of artificial blood Artificial blood can be beneficial because it can be used for any patient who needs a blood transfusion, regardless of their blood type, if the substitute has the universal O blood group. There is also less chance of diseases being passed to patients using artificial blood. However, artificial blood has been shown to have adverse side effects, including high blood pressure and a higher chance of heart attacks. The future of artificial blood As of 2022, there have been experiments in the NHS with laboratory-grown RBCs in the RESTORE randomised controlled clinical trial. With further research, artificial blood can be refined and used more, especially when there is low blood availability for transfusions or for people with blood-related diseases. Written by Naoshin Haque Related articles: Sideroblastic anaemia / Kawasaki disease Project Gallery

Pioneering progress in biomaterials, imaging and cancer therapeutics, and cancer-cell surfaces Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Women Leading the Charge in Biomedical Engineering 14/07/25, 15:19 Last updated: Published: 22/03/24, 18:21 Pioneering progress in biomaterials, imaging and cancer therapeutics, and cancer-cell surfaces In collaboration with Kameron's Lab for International Women's Month I was launched into the world of biomedical engineering by following my dreams. I met Dr. Ayanna Howard, an American roboticist and entrepreneur, and after hearing about my aspirations to become a surgeon but also loving robotics, she suggested the subject to me. Biomedical engineering is like a new dawn, seamlessly blending medicine, technology and engineering. It is a dawn that is illuminated by the brilliant dedication of the women who lead and innovate in the field. In a male-dominated industry like engineering, it is refreshing to see that the discipline of biomedical engineering constitutes of 40% women. This article celebrates the women who are redefining the boundaries of this interdisciplinary field. Changing lives with their discoveries, contributions and innovations. By sharing their stories, I aim to not only highlight the importance of diversity and representation in STEM but also to encourage more women to pursue their passions. Women leading biomedical innovation Speaking of women who are pioneering progress in biomedical engineering, this section highlights three of those women. Professor Elizabeth Tanner, Dr. Nimmi Ramanujam and Dr. Carcia Carson. Of course, this list is nowhere near exhaustive of the amazing contributions women have made to this field. I highly encourage you to learn more about the others who are forging a path for us all.... Professor Elizabeth Tanner, OBE, FREng, FRSE, PhD (Hon Caus), MA, DPhil, FIMMM, FIMechE, FIPEM, CEng, CSci Meeting Professor Tanner was like meeting a force to be reckoned with. In fact, I heard her name and about her contributions long before having the chance to meet her as a SEMS student ambassador. Professor Tanner is renowned for her work in biomaterials for bone and joint replacement. She is the Bonfield Professor of Biomedical Materials, Director of the Centre for Sustainable Engineering and the Director of the Institute of Bioengineering at Queen Mary University of London. Her significant contribution to developing HAPEX (hydroxyapatite polyethylene), the first of the bioactive composites used in patients, illustrates her commitment to blending scientific rigor with practical healthcare solutions. She left Queen Mary in 2007 to join the University of Glasgow where she started their Biomedical Engineering degree. This was the first in Scotland and she continued her research on bioactive composite materials there. Returning to Queen Mary in 2018, she has influenced countless students, including myself as my professor. She imparts not only knowledge in her lessons but also her passion. If you ever study biomedical engineering at Queen Mary, you can look forward to her engaging lecture on gait. Dr. Nimmi Ramanujam As a distinguished Professor of Biomedical Engineering and the Director of the Centre for Global Women’s Health Technologies, Dr. Ramanujam’s work represents meaningful innovation. Her work focuses on developing imaging and therapeutic tools for cancer, especially in women’s help. It is truly transforming the approach to cancer care and goes beyond the lab. She has made several global initiatives that aim to make a long lasting impact on health and education. One of the most well known is the Women Inspired Strategies for Health (WISH). Carcia Carson, PhD Dr. Carcia Carson is an inspiration for young black women in engineering. She hold the historic achievement of the first Black woman to earn a Ph.D. in Biomedical Engineering at Vanderbilt University. Her success and journey exemplify the steps being made towards diversity and representation in STEM fields. She was introduced to medical physics through her studies at Fisk University. After her Ph.D, her professional research will center around developing translational research in cancer vaccines and personalised immunotherapy. Her research focuses on engineering cancer-cell surfaces with surface-conjugated nanomaterial drug carries to enhance immunogenicity of whole cell-based cancer vaccines. To break it down a bit, cell-surface conjugation permits co-localised delivery of both tumor antigens and immune-stimulatory adjuvants. She notes that while studying she ‘didn’t see anybody that looked like’ her. With this being the experience for many woman of colour in STEM, the need for representation and diversity remains imperative. The importance of representation With biomedical engineering progressing every day, the significance of representation cannot be overstated. Diversity in the field is not just about fairness and equity, it is about ensuring that the innovation includes people from a wide range of backgrounds. This way, problems are being solved for a multitude of cultures and needs, not just a cookie cutter solution. The 40% of women in biomedical engineering are more than a statistic, they are a testament to the rich and varied perspectives in this critical field. It is wonderful to see. Representation is profoundly important for several reasons, especially in healthcare. For example, the speculum has remained the same for over 150 years. This cold, uncomfortable device is used for the screening of cervical cancer. Until recently, it has remained untouched and led to women being put off the test entirely. In the UK, nearly 98% of cases are classed as preventable. Women bring valuable insights into women’s health issues through advocation, and creating inclusive healthcare solutions. A diverse workforce challenges the status quo and leads to novel approaches and thinking. Furthermore, the presence of women in leadership roles within biomedical engineering catalyses change and creates opportunities for the next generation. Young girls are more likely to pursue careers ins STEM if they see other women succeeding in them. This representation builds a pipeline of talent that is crucial for the sustained growth and evolution of biomedical engineering. The power of mentorship Outside of representation, the transformative power of mentorship is so important. Having a mentor is like the difference between navigating in the dark and having someone hold your hand with a comforting light. This mentorship can take a variety of forms: formal mentorship programs (sometimes provided by a university), organic relationships with friends and family and even virtually. A pivotal moment in my career was meeting my mentor, Dr. Carika Weldon. She was the first black Bermudian woman I met who was doing genetic research. But not only doing it, she was coming back home to share her success and giving back to the community. Conclusion Women’s invaluable contributions to biomedical engineering have made it clear that their involvement has been nothing short of transformative. Professor Elizabeth Tanner, Dr. Nimmi Ramanujam and Dr. Carcia Carson have had inspiring journeys of not only professional success but also in moving the field towards more diversity and inclusion. From launching the first biomedical engineering course in Scotland, to being the first black woman to hold a Ph.D in the field. These inspiring women serve as role models to us all. It is inspiring stories like theirs that we need as students with a passion for STEM. But many students find themselves unable to find mentors or someone in the STEM community to speak with. To learn from and to be inspired by. This is the reason that I launched my podcast, Kameron’s Lab| Dive In. I hope that it will be a platform for students to learn from the experts in the fields they aspire to be a part of. I remember only meeting a successful black woman in genetics when I was 16 years old. Students deserve to see people like them who are successful in the fields they love. My podcast aims to introduce them early by creating a library of professionals. Or as I like to call them, the Jedi Masters of STEM. Going back to the amazing women in biomedical engineering, their increasing presence is a sign of progress. But of course, more work needs to be done. We need to make sure that women not only enter this field, and other engineering fields, but also thrive and ascend to leadership positions. Only in these roles can they make the most significant change and shape the future of healthcare and technology. This narrative serves as not only a celebration of achievements, but also a call to action. To all aspiring female engineers, and scientists, it’s a showcase of possibilities and encouragement. To educators and industry leaders, it’s a reminder of the importance and benefits of a diverse workforce. As we continue to celebrate and support the achievements of women in this field, we are also moving closer to a future where the potential of every individual can be nurtured and realized for the benefit of all. Written by Kameron Young -- Scientia News wholeheartedly thanks Kameron Young , Founder of Kameron's Lab, for this interesting article on the pioneering individuals in the field of biomedical engineering. We hope you enjoyed reading this International Women's Month Special piece! Follow @Kamerons_Lab on Instagram and @Kameron Young on Linkedin for more information. -- Check out the amazing work Kameron does and follow her social pages for latest content! -- Read more about the inspiring women mentioned in the article: Professor Elizabeth Dr. Nimmi Dr. Carcia -- Related articles: Female Nobel prize winners in physics and in chemistry / African-American women in cancer research / The foremothers in gynaecology / Sisterhood in STEM REFERENCES Khan M. The success of women in Biomedical Engineering [Internet]. MedTech Foundation. 2023. Available from: https://www.medtechfoundation.org/post/the- success-of-women-in-biomedical-engineering Prof Elizabeth Tanner [Internet]. QMUL School of Engineering and Materials Science. Available from: https://www.sems.qmul.ac.uk/staff/k.e.tanner Young Lady bags PhD in Biomedical Engineering, sets record as the first-ever black person to achieve it in US university | Scholarship Region [Internet]. 2023. Available from: https://www.scholarshipregion.com/young-lady-bags-phd-in-biomedical-engineering-sets-record-as-the-first-ever-black-person-to-achieve-it-in-us-university/ Carcia Carson [Internet]. Fisk-Vanderbilt Master’s-to-PhD Bridge Program. Available from: https://www.fisk-vanderbilt-bridge.org/carcia-carson How enduring use of 150-year-old speculum puts women off smear tests [Internet]. The Independent. 2022. Available from: https://www.independent.co.uk/life- style/women/speculum-use-smear-tests-pain-sexism-b2105111.html Project Gallery

Uncovering the truth behind the origins of the virus Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Origins of COVID-19 10/07/25, 10:27 Last updated: Published: 08/10/23, 16:07 Uncovering the truth behind the origins of the virus The quest for the crime of the century begins now! Suspicion of the Wuhan Institute of Virology Since the early epidemic reports in Wuhan, the origin of COVID-19 has been a matter of contention. Was SARS-CoV-2 the outcome of spontaneous transmission from animals to humans or scientific experimentation? Although most of the recorded initial cases occurred near a seafood market, Western Intelligence Agencies knew that the Wuhan Institute of Virology (WIV) was situated nine miles to the south. Researchers at the biosafety centre combed Yunnan caves for bats harbouring SARS-like viruses. They have been extracting genetic material from their saliva, urine, and faeces. Additionally, bat coronavirus RaTG13 (BatCoV RaTG13) shared 96% of its genome with SARS-CoV-2. Suspicion increased when it was discovered that WIV researchers dealt with chimeric versions of SARS-like viruses capable of infecting human cells. However, similar "gain-of-function" studies in Western biosecurity institutions have shown that such slow virulence increases may occur naturally. The coincidence that the pandemic began in the same city as the WIV outbreak was too obvious to ignore. According to two Chinese specialists , "the likelihood of bats flying to the market was quite remote". Chan and Ridley's "Quest for the Origin of COVID-19" Chan and Ridley have created a viral whodunit titled "Quest for the origin of COVID-19" to excite the curiosity of armchair detectives and scientific sceptics. Both need clarification as to why a virus of unknown origin was detected in Wuhan and not in Yunnan, 900 kilometres to the south. The stakes could not be more significant; if the virus were deliberately developed and spread by a Chinese laboratory, it would be the crime of the century. They are prudent in not going that far. They are, however, within their rights to cast doubt on the findings since their concerns were shared by numerous coronavirus experts who openly discounted the possibility of a non-natural origin and declared that the virus displayed no evidence of design at the time. Is this the impartial and fair probe the world has been waiting for? They present no evidence for the development of SARS-CoV-2. For example, Chan asserts that it seemed pre-adapted to human transmission " to an extent comparable to the late SARS-CoV-2 outbreak ". This statement is based on a single spike protein mutation that appears to "substantially enhance" its potential to connect to human receptor cells, meaning it had "apparently stabilised genetically" when identified in Wuhan. Nonetheless, this is a staggeringly misleading statement. As seen by the alphabet soup of mutations, the coronavirus has undergone multiple alterations that have consistently increased its suitability. Additionally, viruses isolated from pangolins attach to human receptor cells more efficiently than SARS-CoV-2, indicating the possibility of additional adaptation. According to two virologists, although the SARS-CoV-2 virus was not wholly adapted to humans, it was "merely enough". Evidence for design of SARS-CoV-2 and possible natural origins of the virus Another concerning feature of SARS-CoV-2 is a furin cleavage site, which enables it to infect human cells by interfering with the receptor protein. The identical sequence is present in highly pathogenic influenza viruses and was previously utilised to modify the spike protein of COVID-19. Chan and Ridley explain that this is the kind of insertion that would occur in a laboratory-modified bat virus. As a result, 21 leading experts have concluded that the furin sequence is insufficient. Coronaviruses have been shown to possess " near identical " genomes that often can infect humans and animals. Because the furin cleavage site characteristic is not seen in known bat coronaviruses, it is possible that it evolved naturally. Surprisingly, Chan and Ridley do not suggest that the SARS virus's high human infectivity feature was inserted on purpose since "there is no way to determine". There is also no way to determine if a RaTG13 is the pandemic virus's progenitor since history is replete with pandemics that began with zoonotic jumps. This argument is based on the strange fact that WIV researchers retrieved the bat isolate in 2013 from a decommissioned mine shaft in Yunnan. Six people were removing bat guano from the cave that year when they suffered an unexplained respiratory ailment. As a consequence, half of them perished. The 4% genetic diversity between RaTG13 and SARS-CoV-2, on the other hand, is similar to 40 years of evolutionary change. While exploring caves in northern Laos, researchers discovered three more closely related bat coronaviruses, which have a higher affinity to attach to human cells than the early SARS-CoV-2 strains. This indicates an organic origin, either through another animal host or directly from a bat, maybe when a farmer went into a cave. This is arguably the most reasonable explanation since it is consistent with forensic and epidemiological data. The food sample isolates collected from the Wuhan seafood market are similar to human isolates, and the majority of original human cases had a history of market exposure, in contrast to the absence of an epidemiological connection to the WIV or any other Wuhan research institution. Lack of evidence for a laboratory origin If scientists could demonstrate prior infection at the Wuhan market or other Chinese wildlife markets that sell the most likely intermediary species, including pangolins, civet cats, and raccoon dogs, the case for a natural origin would be strengthened. Although multiple animals tested positive for sister human viruses during the SARS epidemic, scientists have yet to find evidence of earlier infections in animals in the instance of Sars-CoV-2. Nonetheless, the absence of evidence does not confirm the absence and may indicate that samples were not taken from the appropriate animal. The same may be said of the lab leak argument's lack of evidence. However, even though history is littered with pandemics, no significant pandemic has ever been traced back to a laboratory. In other words, the null hypothesis is a zoonotic occurrence; Chan and Ridley must demonstrate otherwise. The irony is their drive to construct a compelling case for a laboratory accident. They are oblivious to the much more pressing story of how the commerce in wild animals, global warming, and habitat degradation increase the likelihood of pandemic viral development. This is the most plausible origin story that should concern us. Summary Although Chan and Ridley's "Quest for the Origin of COVID-19" has cast suspicion on the Wuhan Institute of Virology, there is still insufficient evidence to support the lab leak theory. There is, however, growing evidence for a natural origin of SARS-CoV-2, with multiple animals testing positive for sister human viruses during the SARS epidemic and the discovery of more closely related bat coronaviruses in northern Laos. As such, we should be more concerned with the increasing likelihood of pandemic viral development due to the commerce in wild animals, global warming, and habitat degradation. Written by Sara Maria Majernikova Project Gallery

The slippery property of a superfluid is caused by its ability to flow very easily Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link The incredibly slippery nature of superfluids 03/04/25, 10:33 Last updated: Published: 24/05/23, 08:53 The slippery property of a superfluid is caused by its ability to flow very easily Slipperiness is a property that we often associate with everyday objects like ice, soap, and banana peels. However, there is a substance that is even more slippery than these: superfluids. A normal liquid becomes a superfluid when it is cooled down below a certain temperature. This temperature is unique to all fluids, for example for helium it is 2.17 K. Below this temperature, the superfluid will behave in completely unique ways. For example, if a container of water at room temperature was spun, you’d expect the water to also spin around, creating a whirlpool. Whereas a superfluid in a spinning container doesn’t spin at all, until it reaches a certain speed! The slippery property of a superfluid is caused by its ability to flow very easily. Usually it’s safe to leave a glass of water on a countertop (unless of course you’ve got a particularly excitable dog), but if you were to leave a glass of superfluid on a table, the liquid would creep out and escape. The tiny changes in temperature or pressure in the container cause it to flow, seemingly defying gravity. Unfortunately, superfluids cannot just be bought in the local supermarket! To produce a superfluid, devices known as cryostats can be used to cool a substance down to low temperatures. Using the ideal gas model, pressure, and volume can be related, so by reducing the pressure, the temperature of the device can also be decreased. The pressure is reduced using a vacuum pump, which works by removing particles from the cryostat. The applications of superfluids are limited as, due to the typically very low temperatures needed for a normal fluid to transition to a superfluid, there is difficulty in producing superfluids. Currently, scientists are working on finding fluids that enter a stable superfluid state at room temperatures. However, superfluids are used within many fields of physics to explain certain phenomena. One theory is that the core of collapsed large stars (neutron stars) is a superfluid, despite the very hot temperatures. The idea is that below a certain temperature, it uses less energy for the core to behave like a superfluid which cools the star down at an increased rate. The superfluid theory of neutron stars is just a hypothesis, however hints at the role superfluids play in all areas of physics. Written by Madeleine Hales REFERENCES/ FURTHER READING: https://www.aps.org/publications/apsnews/200601/history.cfm#:~:text=In%201927%20Willem%20Keesom%20and,helium%20I%20and%20helium%20II . https://physicsworld.com/a/neutron-star-has-superfluid-core/ Project Gallery

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