American scientists say they’ve developed a way to grow wood materials in a laboratory. The method could create different wood products indoors in a single process, greatly cutting the time and money spent on production and reducing damage to the world’s forests.
Researchers from the Massachusetts Institute of Technology (MIT) showed a proof of concept by growing wood-like structures from cells taken from the leaves of a flowering plant. The process can hopefully simplify and speed up the production of wood products.
“The way we get these materials hasn’t changed in centuries and is very inefficient,” lead researcher Luis said. “The present process for making any wooden product can take many years. First, a tree has to grow. Then, it must be cut down, transported, processed, etc. Lab-grown wood, however, could combine all those steps into one. If you want a table, then you should just grow a table.”
In the wood experiment, the MIT team collected live cells from the leaves of a zinnia plant. The plant cells were then cultured and kept in a special environment. The experiment was carried out indoors, without soil or sunlight. During the process, the researchers used a mixture of two plant hormones (荷尔蒙) that helped the cells grow a thick, strong wood-like structure. With further development, the researchers say they could use the same process to grow wood in specific shapes, such as a table or chair.
“The process can remove difficulties linked to weather and seasonality in traditional agriculture methods,” Luis said. “Though it is still in early development, our team will be working to learn how to better control the final materials that are produced. And, we will also carry out new experiments to see whether the same results can be reached with other kinds of plants.”
David Stern, a plant biologist and president of the Boyce Thompson Institute told MIT News, “It sounds that this technology is very powerful, but what the researchers ignore is that further development of the method would require major financial and intellectual investments.” He also said new issues would arise when parts of forestry and agriculture are brought into the lab.
【小题1】What can the method developed by American scientists be described as?A.cost-effective | B.widely applicable | C.eco-friendly | D.time-consuming |
A.By using specific figures. | B.By providing definitions. |
C.By making a comparison. | D.By showing causes and effects. |
A.To make the wood grow in specific shapes. |
B.To promote the growth of the live plant cells. |
C.To prevent sunlight from hurting the plant cells. |
D.To help the plant cells adapt to the special environment. |
A.Trees that grow naturally will be useless |
B.The furniture in your office is probably growing |
C.Forests made in the lab will change the environment |
D.Scientists develop a method to grow wood in a lab |
Are you interested in hi-tech products? Here are some that you might find at the market pretty soon.
CX-1
Tired of dragging your bag through busy airports? Then you might want to consider CX-1. The smart suitcase uses facial recognizing software to follow its owner as he/she is checking in or heading to the gate. Though CX-1 can only move at a speed of up to seven miles per hour, a tiny tool enables the owner to keep track of the suitcase’s location.
Aibo
Sony’s latest version of the Aibo robotic dog is almost as fun as the real thing —but much less work. The pet dog can recognize its owner, obey several commands, and even recall the behavior that pleases its master the most. Aibo can also learn new tricks, take photographs, and over time, develop its own unique personality.
Forpheus
Forpheus, an “athletic” robot developed by Japanese technology company Omron. It teaches users how to play ping-pong. The 10-feet-tall machine uses a camera and artificial intelligence to track the ball’s speed and can predict the ball’s direction correctly. The smart Forpheus can also quickly test its player’s abilities and adjust the playing level, making the game fun.
Black Box VR
Though many people determine to go to the gym once a week, few reach their goal. Black Box VR wants to change that by turning hard exercise into fun video games. Using it, gym users will find themselves fighting enemies, including big creatures—all while getting exercise.
【小题1】What is the feature of CX-1?A.It can identify and follow its owner. | B.It can sense the suitcase’s location. |
C.It can move very fast in busy places. | D.It can be opened by facial expressions. |
A.People who like playing tricks on others. | B.People who want to walk a dog after work. |
C.People who like taking high-quality pictures. | D.People who want but can’t look after a real dog. |
A.CX-1. | B.Aibo. | C.Forpheus. | D.Black Box VR. |
Beijing is hardly alone in its air pollution problems. The world Health Organization has said that roughly half of the world’s urban population is exposed to pollution at least 2.5 times higher than it recommends.
While it may take years to fix this global problem, innovative minds in the Asia region have come up with creative solutions for living with air pollution.
DIY Purifier
Thomas Talhelm started worrying about the air inside his Beijing home during “airpocalypse” in 2013 when Beijing’s air quality index skyrocketed to a terrifying 755.
The scholar couldn’t afford the luxury of an expensive air purifier. “Fillers are actually very simple— a high efficient filter is all you need to get over 96% of the PM2.5,” he said.
With three of his friends, Talhelm created Smart Air, an air purifier consisting of a basic household fan with a high efficient filter attached to it.
It works as efficiently as the big brands selling for thousands of dollars, removing more than 90 percent of PM 2.5 in your room, according to Talhelm’s research.
Invisible Mask
Infipure’s “nose mask” claims to cut 99% of PM2.5 without the trouble of a surgical face mask.
The filters, made from special materials, are inserted into your nose and aim to be undetectable.
“People care about their health, but don’t want all the downsides that come with a traditional face mask.” Infipure co-founder Francis Law explained.
Plant Backpack
Taiwanese artist Chui Chih has designed a survival device for an apocalyptic world.
Named Voyage on the Planet, a potted plant is housed inside a clear backpack hooked up to two tubes to bring fresh to a face mask. It’s a bold, abstract idea from an oxygen tank.
Smog Vacuum
Daan Roosegaarde has been working on a smog vacuum that will suck pollutants from the sky to the ground like a vacuum, making way for clean air.
A byproduct of this smog vacuum, namely The Smog Free Tower, is the “smog ring”—a piece of jewelry made from smog particulates.
“The pollution we suck up, the small particulates, we don’t throw them away. We put them under pressure for a couple of weeks and they crystallize, creating something like a diamond,” Roosegaardc explains.
【小题1】Thomas Talhelm invented Smart Air for all the following reasons except ________.A.the high price of the big brands | B.the help from three of his friends |
C.the poor quality of the indoor air | D.the simple principle behind the device |
A.Smart Air. | B.Infipure’s nose mask. |
C.Voyage on the Planet. | D.The Smog Free Tower. |
A.DIY Purifier. | B.Invisible Mask. | C.Plant Backpack. | D.Smog Vacuum. |
A small robot may help children who are recovering from a long-term illness in the hospital or at home. These children may fell isolated(隔绝) from their friends and classmates. However, there is a piece of good news for them.
Anyone who has had a long-term illness knows that recovering at home can be lonely. This can be especially true of children. They may fell left out.
The best part is that students can take part in classroom activities from wherever they are recovering ——whether at home or on the hospital bed. The robot is equipped with speaker, microphones and cameras, which makes communicating easier. It means they can communicate with their teachers and classmates easily.
A.So they won’t feel left out at all. |
B.They just want to recover quickly. |
C.As a result, they can get really sad. |
D.The robot can take their place at school. |
E.And the child’s school friends must help. |
F.It took a lot of money to invent the robots. |
G.A Norwegian company called No Isolation created the robot. |
组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网