Archive for the ‘3D printing’ category: Page 55
Nov 13, 2019
Multimaterial 3D printing manufactures complex objects, fast
Posted by Alexandria Black in categories: 3D printing, engineering, physics
3D printers are revolutionizing manufacturing by allowing users to create any physical shape they can imagine on-demand. However, most commercial printers are only able to build objects from a single material at a time and inkjet printers that are capable of multimaterial printing are constrained by the physics of droplet formation. Extrusion-based 3D printing allows a broad palette of materials to be printed, but the process is extremely slow. For example, it would take roughly 10 days to build a 3D object roughly one liter in volume at the resolution of a human hair and print speed of 10 cm/s using a single-nozzle, single-material printhead. To build the same object in less than 1 day, one would need to implement a printhead with 16 nozzles printing simultaneously!
Now, a new technique called multimaterial multinozzle 3D (MM3D) printing developed at Harvard’s Wyss Institute for Biologically Inspired Engineering and John A. Paulson School of Engineering and Applied Sciences (SEAS) uses high-speed pressure valves to achieve rapid, continuous, and seamless switching between up to eight different printing materials, enabling the creation of complex shapes in a fraction of the time currently required using printheads that range from a single nozzle to large multinozzle arrays. These 3D printheads themselves are manufactured using 3D printing, enabling their rapid customization and facilitating adoption by others in the fabrication community. Each nozzle is capable of switching materials at up to 50 times per second, which is faster than the eye can see, or about as fast as a hummingbird beats its wings. The research is reported in Nature.
“When printing an object using a conventional extrusion-based 3D printer, the time required to print it scales cubically with the length of the object, because the printing nozzle has to move in three dimensions rather than just one,” said co-first author Mark Skylar-Scott, Ph.D., a Research Associate at the Wyss Institute. “MM3D’s combination of multinozzle arrays with the ability to switch between multiple inks rapidly effectively eliminates the time lost to switching printheads and helps get the scaling law down from cubic to linear, so you can print multimaterial, periodic 3D objects much more quickly.”
Nov 13, 2019
Can we Live Forever? (Full Documentary)
Posted by Paul Battista in categories: 3D printing, bioengineering, bioprinting, biotech/medical, cryonics, economics, education, ethics, genetics, law, life extension, nanotechnology, singularity
TABLE OF CONTENTS —————
0:00–17:57 : Introduction (Meaning of Life)
17:58–37:45 CHAPTER 1: Longevism and Life Extension
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WHY DOES AGING HAPPEN?
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37:46–54:39 CHAPTER 2 : Gerontonology and Aging a. Free Radical Theory of Aging b. Waste Accumulation Theory of Aging c. Stem Cell Theory of Aging d. DNA Damage Theory of Aging.
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HOW DO WE CURE AGING?
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54:39–1:08:39 : CHAPTER 3 :The Biochemical Solution (#1)
a. mitoSENS
b. oncoSENS
c. lysoSENS
d. amyloSENS
e. apoptoSENS
f. repliSENS
g. glycoSENS
1:08:40–2:13:12 CHAPTER 4 : The Physiological Solution (#2)
a. Parabiosis and Biovampirism b. Regeneration and Stem Cells c. Lab Grown Organs and Bioprinting d. Head Transplants and Doppleganger Bodies.
2:13:12–2:33:19 CHAPTER 5 : The Genetic Solution (#3)
a. TALEN genetic engineering b. Zinc-Finger gene tailoring c. CRISPR-Cas9 gene editing.
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WILL WE CURE AGING GENETICALLY?
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2:33:20–2:49:58 : CHAPTER 6 : Genomics and DNA
2:49:59–3:05:48 : CHAPTER 7 : Transcriptomics and RNA
3:05:49–3:22:08 : CHAPTER 8 : Proteomics and TNA
3:22:09–3:39:38 : CHAPTER 9 : Xenobiology and XNA
a. alien proteins b. alien base pairs c. alien DNA
3:39:39–3:54:58 : CHAPTER 10 : Vectors and Gene Therapy (Gene Editing #1)
3:54:59–4:14:57 : CHAPTER 11 : Synthetic Biology (Gene Editing #2)
4:14:58–4:32:14 : CHAPTER 12 : Chimeras, Rianths, and Splices (Gene Editing #3)
4:32:15–4:48:35 : CHAPTER 13 : Ouroborology and Immortal Chimeras (Gene Editing #4)
4:48:36-:5:03:52 : CHAPTER 14 : Kleptoplasty and Photosynthesis (Gene Editing #5)
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HOW TO SURVIVE UNTIL AGING IS CURED
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5:03:53–5:14:27 : CHAPTER 15 : Survive to the Singularity a. the breakeven point b. longevity escape velocity c. the longevity dividend.
5:14:28–5:30:16 : CHAPTER 16 : Centennarians and Blue Zones (Survival Method #0)
a. loma linda b. ikaria c. sardinia d. okinawa.
5:30:17–5:42:26 : CHAPTER 17 : Risk Aversion and Micromorts (Survival Method #1)
a. micromorts
b.microlives
5:42:27–5:58:18 : CHAPTER 18 : Nutraceuticals and Geroprotectors (Survival Method #2)
a. rapamycin b. metformin c. selegilene d. nicotinamide riboside e. resverratrol.
5:58:19–6:12:51 : CHAPTER 19 : Caloric Restriction (Survival Method #3)
a. endocrine b. epigenetic c. genetic
6:12:52–6:51:57 : CHAPTER 20 : Cryonics & Cryogenics (Survival Method #4)
a. the efficacy question b. the cost question c. the resurrection question d. the identity question e. the legal question f. the catastrophe question g. the culture question.
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CAN WE BE IMMORTAL WITHOUT CURING AGING?
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6:51:58–7:04:08 : CHAPTER 21 : Genetic Immortality — Test Tube Babies
7:04:09–7:24:02 : CHAPTER 22 : Genetic Immortality — Designer Babies
7:24:03–7:41:55 : CHAPTER 23 : Genetic Immortality — Clone Babies
7:41:56–7:53:08 : CHAPTER 24 : Genetic Immortality — Artificial Wombs
7:53:08–7:53:09 CHAPTER 25 : Immortalism and Ethics a. the crime argument b. the natural argument c. the boredom argument d. the inequality argument e. the overpopulation argument f. the gerontocracy argument g. the economic argument h. EPILOGUE
Patreon https://www.patreon.com/transhumania
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Nov 5, 2019
Liquid-in-liquid printing method could put 3D-printed organs in reach
Posted by Klaus Baldauf in categories: 3D printing, biotech/medical
Nov 4, 2019
Scientists 3D-Printed Living Skin, Complete With Blood Vessels
Posted by Omuterema Akhahenda in categories: 3D printing, biotech/medical
Researchers claim to have 3D-printed skin that’s alive and has blood vessels. The new technique could greatly accelerate the healing process for patients who require skin grafts, such as burn victims. In an animal trial phase, the printed skin even connected to a mouse’s own blood vessels.
This could be a game changer for burn victims.
Nov 3, 2019
3D-Printed Gill Lets You Breathe Underwater
Posted by Paul Battista in categories: 3D printing, wearables
Nov 2, 2019
Living skin can now be 3D-printed with blood vessels included
Posted by Shailesh Prasad in categories: 3D printing, biotech/medical, engineering
Researchers at Rensselaer Polytechnic Institute have developed a way to 3D print living skin, complete with blood vessels. The advancement, published online today in Tissue Engineering Part A, is a significant step toward creating grafts that are more like the skin our bodies produce naturally.
“Right now, whatever is available as a clinical product is more like a fancy Band-Aid,” said Pankaj Karande, an associate professor of chemical and biological engineering and member of the Center for Biotechnology and Interdisciplinary Studies (CBIS), who led this research at Rensselaer. “It provides some accelerated wound healing, but eventually it just falls off; it never really integrates with the host cells.”
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Oct 28, 2019
Alert system for failing nuclear plant pipes uses thin films and sound vibrations
Posted by Genevieve Klien in categories: 3D printing, food, life extension, nanotechnology
A failing pipe can be tough to spot. It may cause a puddle, produce another sign of damage, or simply burst before detection. A flooded kitchen or laundry room is messy and inconvenient, but the stakes are much, much higher in nuclear power plants—which on average contain many miles of pipeline.
As concern about aging plants escalates, Vanderbilt engineers are working on an early warning system. They are using polymer coatings on the inside of the pipe and 3D-printed polymer devices infused with nanoparticles as sensors to signal the changes on the outside of the pipe. And, they hope, sound.
A huge challenge is to detect the changes in the polymer film occurring inside the pipe. To create a useful and proactive technique, the team wants to use sound, or vibrometry, to identify these internal changes from outside the pipe.
Oct 16, 2019
3D Printing Organs is CLOSER thanks to Lulzbot BIO
Posted by Shailesh Prasad in categories: 3D printing, bioprinting, biotech/medical
Bio printing footage provided by College of Engineering, and heart valve footage provided by Regenerative Biomaterials Group, Carnegie Mellon University.
https://regenerativebiomaterials.com/
Lulzbot invited us out to showcase the BIO, their OPEN SOURCE 3D printer capable of 3D bioprinting. Materials like unmodified collagen and fetal stem cells! It’s open source, and launches at a price of $7500 USD.
Continue reading “3D Printing Organs is CLOSER thanks to Lulzbot BIO” »
Oct 16, 2019
The US military wants super-soldiers to control drones with their minds
Posted by Klaus Baldauf in categories: 3D printing, drones, military, neuroscience
I n August, three graduate students at Carnegie Mellon University were crammed together in a small, windowless basement lab, using a jury-rigged 3D printer frame to zap a slice of mouse brain with electricity.
The brain fragment, cut from the hippocampus, looked like a piece of thinly sliced garlic. It rested on a platform near the center of the contraption. A narrow tube bathed the slice in a solution of salt, glucose, and amino acids. This kept it alive, after a fashion: neurons in the slice continued to fire, allowing the experimenters to gather data. An array of electrodes beneath the slice delivered the electric zaps, while a syringe-like metal probe measured how the neurons reacted. Bright LED lamps illuminated the dish. The setup, to use the lab members’ lingo, was kind of hacky.
