Tag Archives: green

Israeli Startup To Grow Meat In The Lab

 Tyson Foods (TSN.N), the largest U.S. meat processor, has invested in an Israeli biotech company developing a way to grow affordable meat in a laboratory that takes live animals out of the equation.

Future Meat Technologies focuses on producing fat and muscle cells that are the core building blocks of meat, and is one of several firms working on technology to match rising demand for meat without adding more pressure on land from livestock. The firm’s founder and chief scientist, Yaakov Nahmias, said cultured meat typically had a production price of about $10,000 per kg but so far his company had reduced that to $800/kg and had “a clear roadmap to $5$10/kg by 2020.” Tyson’s venture capital arm has supported the Jerusalem-based startup by co-leading $2.2 million in seed investment.

We continue to invest significantly in our traditional meat business but also believe in exploring additional opportunities for growth that give consumers more choices,” said Justin Whitmore, Tyson’s executive vice president for corporate strategy. In December, Tyson raised its stake in plant-based protein maker Beyond MeatDemand for meat is expected to double between 2000 and 2050, when the earth’s population is set to surpass 9 billion, and proponents of growing meat in the lab say it is the only way to meet such demand without destroying the environment.

Source: https://www.reuters.com/

Perovskite Solar Cells One Giant Step Closer To The Market

Harnessing energy from the sun, which emits immensely powerful energy from the center of the solar system, is one of the key targets for achieving a sustainable energy supplyLight energy can be converted directly into electricity using electrical devices called solar cells. To date, most solar cells are made of silicon, a material that is very good at absorbing light. But silicon panels are expensive to produce.

Scientists have been working on an alternative, made from perovskite structures. True perovskite, a mineral found in the earth, is composed of calcium, titanium and oxygen in a specific molecular arrangement. Materials with that same crystal structure are called perovskite structuresPerovskite structures work well as the light-harvesting active layer of a solar cell because they absorb light efficiently but are much cheaper than silicon. They can also be integrated into devices using relatively simple equipment. For instance, they can be dissolved in solvent and spray coated directly onto the substrate.

Materials made from perovskite structures could potentially revolutionize solar cell devices, but they have a severe drawback: they are often very unstable, deteriorating on exposure to heat. This has hindered their commercial potential. The Energy Materials and Surface Sciences Unit at the Okinawa Institute of Science and Technology Graduate University (OIST), led by Prof. Yabing Qi, has developed devices using a new perovskite material that is stable, efficient and relatively cheap to produce, paving the way for their use in the solar cells of tomorrow. This material has several key features:

  • First, it is completely inorganic – an important shift, because organic components are usually not thermostable and degrade under heat. Since solar cells can get very hot in the sun, heat stability is crucial. By replacing the organic parts with inorganic materials, the researchers made the perovskite solar cells much more stable..  “The solar cells are almost unchanged after exposure to light for 300 hours,” says Dr. Zonghao Liu, an author on the paper.
  • Second feature: Inorganic perovskite solar cells tend to have lower light absorption than organic-inorganic hybrids, however, but the OIST researchers doped their new cells with manganese in order to improve their performance. Manganese changes the crystal structure of the material, boosting its light harvesting capacity.  “Just like when you add salt to a dish to change its flavor, when we add manganese, it changes the properties of the solar cell,” says Liu.
  • Thirdly, in these solar cells, the electrodes that transport current between the solar cells and external wires are made of carbon, rather than of the usual gold. Such electrodes are significantly cheaper and easier to produce, in part because they can be printed directly onto the solar cells. Fabricating gold electrodes, on the other hand, requires high temperatures and specialist equipment such as a vacuum chamber.

The findings are published in Advanced Energy Materials. Postdoctoral scholars Dr. Jia Liang and Dr. Zonghao Liu made major contributions to this work.

Source: https://www.oist.jp/