| 单词 | chitin |
| 例句 | Shrimp and grasshoppers are both arthropods, and it’s a polysaccharide — chitin — common to the exoskeletons of both that causes sensitive eaters to suffer indignities ranging from hives and congestion to dizziness and vomiting. My first taste of flesh 2013-03-12T00:00:00Z Other genes worth targeting would be those controlling chitin, the hard polysaccharide that makes up insects’ exoskeleton. How Gene-Edited Insects Are Providing Food, Fuel and Waste Disposal 2023-08-28T04:00:00Z Arthropods also show the presence of an exoskeleton made principally of chitin, which is a waterproof, tough polysaccharide. Fundamentals of Biology 2015-01-01T00:00:00Z Starch, glycogen, cellulose, and chitin are examples of polysaccharides. Concepts of Biology 2013-04-25T00:00:00Z They also provide structural support, such as the polysaccharide cellulose in plants and the modified polysaccharide chitin in fungi and animals. Chemistry 2019-02-14T00:00:00Z What is the major difference between chitin and other types of polysaccharides? Biology for AP Courses 2022-06-09T00:00:00Z Fungi are heterotrophic eukaryotes with cell walls that contain chitin. Miller & Levine Biology 2018-01-01T00:00:00Z It is made up of two layers: the epicuticle, which is a thin, waxy water-resistant outer layer containing no chitin, and the layer beneath it, the chitinous procuticle. Fundamentals of Biology 2015-01-01T00:00:00Z This exoskeleton is made of the biological macromolecule chitin, which is a nitrogenous carbohydrate. Concepts of Biology 2013-04-25T00:00:00Z The ability to eat chitin, or eat byproducts given off by other species as they break down chitin, is key for the microbial community to survive, according to NASA. Some of WA’s tiniest residents to be launched into space 2022-07-14T04:00:00Z Doubling of body size increases body weight by a factor of eight, and the chitin thickness of the exoskeleton has to significantly increase to accommodate weight increase. Biology for AP Courses 2022-06-09T00:00:00Z Members of the kingdom Fungi are heterotrophs with cell walls containing chitin. Miller & Levine Biology 2018-01-01T00:00:00Z The rigid layers of fungal cell walls contain complex polysaccharides called chitin and glucans. Fundamentals of Biology 2015-01-01T00:00:00Z As members of Ecdysozoa, arthropods also have an exoskeleton made principally of chitin. Concepts of Biology 2013-04-25T00:00:00Z The soil housing the bacteria will contain chitin, a common microbe chow found in soil worldwide. Some of WA’s tiniest residents to be launched into space 2022-07-14T04:00:00Z The tubes in the tracheal system are made of a polymeric material called chitin. Biology for AP Courses 2022-06-09T00:00:00Z When insects molt, their exuviae contain chitin, a hard polymer that also makes up the shells of crustaceans like shrimp. Insect Trash Could Be a Farmer’s Treasure 2022-03-02T05:00:00Z Like all fungi, chytrids have chitin in their cell walls, but one group of chytrids has both cellulose and chitin in the cell wall. Fundamentals of Biology 2015-01-01T00:00:00Z A thick cell wall made of chitin surrounds the cell. Concepts of Biology 2013-04-25T00:00:00Z “Why forgo those amazing advantages that you get with chitin to replace it with this wax?” How glasswing butterflies grow their invisible wings 2021-06-22T04:00:00Z Starch, glycogen, cellulose, and chitin are primary examples of polysaccharides. Biology for AP Courses 2022-06-09T00:00:00Z Microbes, such as the bacteria Bacilli, help plants break down chitin into usable forms. Insect Trash Could Be a Farmer’s Treasure 2022-03-02T05:00:00Z The cuticle of Nematodes is rich in collagen and a carbohydrate-protein polymer called chitin, and forms an external “skeleton” outside the epidermis. Fundamentals of Biology 2015-01-01T00:00:00Z Like plant cells, fungal cells are surrounded by a thick cell wall; however, the rigid layers contain the complex polysaccharides chitin and glucan and not cellulose that is used by plants. Concepts of Biology 2013-04-25T00:00:00Z But, she adds, unless an animal has a rare allergy to chitin, the exoskeleton material, the bugs are not toxic. ‘Flying Treats’: Can Dogs and Cats Snack Safely on Cicadas? 2021-06-14T04:00:00Z As the tough and resistant outer cover of an arthropod, the exoskeleton may be constructed of a tough polymer such as chitin and is often biomineralized with materials such as calcium carbonate. Biology for AP Courses 2022-06-09T00:00:00Z The shells that the nymphs shed and leave all over the place at the beginning are made of chitin, just like lobster and crab shells, and count as “green” material in composting lingo. What is Brood X? When do cicadas come out in 2021? Answering your buggiest questions. 2021-04-01T04:00:00Z Toward that end, Fernandez and others are studying novel materials, including chitin, derived from the shells of crustaceans and insects, and cellulose from wood and paper. "Biodegradable," a magic word for environmentally-minded consumers, isn’t always a green panacea 2020-05-10T04:00:00Z The wings themselves are complex systems that contain both living and nonliving structures, covered by various types of scales made of chitin—a rigid substance that is also found in some shellfish exoskeletons and fungi. Cool Butterfly Effect: Insect Equipment Could Inspire Heat-Radiating Tech 2020-02-18T05:00:00Z In determining that the fossils were of fungi, the researchers identified the presence of a fibrous substance called chitin in Ourasphaira’s cell walls, a key fungal characteristic. Old mold: Fossil of world's earliest fungus unearthed in Canada 2019-05-22T04:00:00Z The increasing thickness of the chitin necessary to support this weight limits most animals with an exoskeleton to a relatively small size. Biology for AP Courses 2022-06-09T00:00:00Z Chemical analyses suggest that the fossils contain chitin, a compound found in fungal cell walls. Billion-year-old fossils set back evolution of earliest fungi 2019-05-21T04:00:00Z Dragonflies, which live in ponds as wriggling larvae, absorb the native isotopes of hydrogen and incorporate them into their chitin. There’s a huge and hidden migration in North America — of dragonflies 2018-12-21T05:00:00Z The nonliving structures include chitin membranes that stretch between wing veins. Cool Butterfly Effect: Insect Equipment Could Inspire Heat-Radiating Tech 2020-02-18T05:00:00Z The nanoscale clusters of zinc are bound into the chitin matrix, imparting hardness without increasing the risk of breakage. Evolution turned this ant into a living drill 2018-08-24T04:00:00Z Increases in body weight increase body size by a factor of eight, and the chitin thickness of the exoskeleton has to significantly decrease to accommodate increase in body size. Biology for AP Courses 2022-06-09T00:00:00Z The fossils were discovered in billion-year-old rock, and the presence of chitin in the specimens further persuaded the researchers that they were preserved fungi that died a billion years ago. Billion-year-old fossils set back evolution of earliest fungi 2019-05-21T04:00:00Z In the wild, V. cholerae engage in natural transformation when they land on a piece of chitin, a major ingredient in insect and crustacean shells, and a rich source of nutrients. Using Harpoon-Like Appendages, Bacteria ‘Fish’ for New DNA 2018-06-14T04:00:00Z Resilin is also found in the cuticular springs, where it is configured in thin layers beneath the chitin. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z P. aphidis contains genes that digest chitin and other chemicals found in fungal cell walls, and also manufacture iron-sequestering particles called siderophores that fight pathogens by depriving them of the iron they need to grow. Leaf Fungus Smoothie Brings Endangered Hawaiian Flower Back From the Brink 2017-12-09T05:00:00Z Doubling of body size increases body weight by a factor of eight, and the chitin thickness of the exoskeleton has to significantly decrease to accommodate weight increase. Biology for AP Courses 2022-06-09T00:00:00Z “These data do not show that these microfossils originally contained chitin.” Billion-year-old fossils set back evolution of earliest fungi 2019-05-21T04:00:00Z These contain chitin, which has potential uses in makeup, soil amendments and biomedical products. Wriggle room: Beta Hatch’s insect farm grows millions of mealworms 2017-06-22T04:00:00Z Resilin is also found in the cuticular springs, where it is configured in thin layers beneath the chitin. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z Compared with healthy people, the patients with ILD harbored twice as much chitin in their airways. Enzyme saves us from insect dust and worm skin 2017-04-20T04:00:00Z Increases in body weight increase body size by a factor of eight, and the chitin thickness of the exoskeleton has to significantly increase to accommodate increase in body size. Biology for AP Courses 2022-06-09T00:00:00Z He also points to the presence of chemical signals characteristic of chitin, and chitin-like fibres on the fossil surface. Billion-year-old fossils set back evolution of earliest fungi 2019-05-21T04:00:00Z The best way to destroy chitin isn’t to crush it, but to tear it. Stingrays Chew? Who Knew? In fact, the layering of chitin and resilin resembles the design of archers’ composite bows from hundreds of years ago, such as those made of horn and wood, or leather and wood. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z But he cautions that “it is too early to say” that chitin plays an important role in human disease. Enzyme saves us from insect dust and worm skin 2017-04-20T04:00:00Z The chemical analysis reveals significant amounts of chitin. Biology for AP Courses 2022-06-09T00:00:00Z Dried shrimp shells sold as a soup seasoning or used to extract chitin, a protein that has various agricultural, industrial and medical uses. La. seafood industry told to think beyond daily catch 2016-07-28T04:00:00Z It has eight shorter tentacles that surround two long, flailing tentacles, each with a bulbous cluster of suckers, each lined with a row of sharp, serrated chitin for feeding. A brief history of squid video 2016-02-16T05:00:00Z In fact, the layering of chitin and resilin resembles the design of archers’ composite bows from hundreds of years ago, such as those made of horn and wood, or leather and wood. Too Small for Big Muscles, Tiny Animals Use Springs 2018-06-18T04:00:00Z A new study bolsters the case that chitin promotes lung diseases. Enzyme saves us from insect dust and worm skin 2017-04-20T04:00:00Z This exoskeleton is made of the biological macromolecule chitin, which is a polysaccharide-containing nitrogen. Biology for AP Courses 2022-06-09T00:00:00Z The conventional method for extracting chitin uses sodium hydroxide, a caustic chemical. Entrepreneurs turn billion dollar seafood waste into profitable products 2015-12-14T05:00:00Z For example, teams in Mexico and the United Kingdom demonstrated a lactic-acid fermentation process for chitin production in the lab and in a pilot plant in the early 2000s5, 6. Sustainability: Don't waste seafood waste 2015-08-09T04:00:00Z In insects, Dr. Burrows said, resilin is often bound to the hard chitin of the exoskeleton, creating strength and flexibility, an arrangement similar to lamination in bows. Legs, Not Wings, Give Moths a Flying Start 2015-04-27T04:00:00Z The team found that these problems stemmed from a common cause: the animals’ inability to break down chitin. Enzyme saves us from insect dust and worm skin 2017-04-20T04:00:00Z Insects have a hard outer skeleton made of chitin, a unique nitrogen-containing polysaccharide. Biology for AP Courses 2022-06-09T00:00:00Z The chitin filaments are just a few billionths of a metre thick - far thinner than a very fine sheet of paper. Beetles' whiteness understood 2014-08-16T04:00:00Z It is found in fungi, plankton and the exoskeletons of insects and crustaceans, and organisms generate about 100 billion tonnes of chitin every year2. Sustainability: Don't waste seafood waste 2015-08-09T04:00:00Z The company, which is exploring a host of applications for chitin extracted from the shells, received roughly $1.5 million from U.S. Researchers aim to find new uses for shrimp shells 2014-07-30T04:00:00Z Some data suggest that AMCase, an enzyme that breaks down chitin, may defend us from the molecule. Enzyme saves us from insect dust and worm skin 2017-04-20T04:00:00Z A critical component of termite digestion is chitin deacetylase, an enzyme whose mutation rate is a model parameter. Biology for AP Courses 2022-06-09T00:00:00Z Made of chitin, these Christmas Trees are just one micron high - one thousandth of one millimetre. Butterfly wings inspire cosmetics and bomb detectors 2014-07-08T04:00:00Z Future investigations need to explore routes from chitin to other chemicals, enhance product yields through improved catalysis and pre-treatments and ease the separation of products. Sustainability: Don't waste seafood waste 2015-08-09T04:00:00Z The fangs are a composite of protein and chitin, a carbohydrate molecule found in the shells of many insects and crustaceans, whose microscopic structure is well suited for its purpose, the results suggest. Spider Fangs Are Perfect for Piercing 2014-05-27T04:00:00Z But as the researchers discovered, even the animals’ food and bedding material contained chitin. Enzyme saves us from insect dust and worm skin 2017-04-20T04:00:00Z The fibers are made of chitin, an organic polymer commonly found in insect and crustacean exoskeletons, while gaps between are filled with calcium carbonate and calcium phosphate. Peacock mantis shrimp’s swift, deadly punch inspires superstrong composite materials 2014-04-26T22:21:17Z And their stomachs and skin are lined with cells that contain small chitin disks that act like sandbags, absorbing the force of the poisonous projectiles. CreatureCast: Poisonous Prey Turned Into Hunter’s Defense 2014-02-12T14:08:35Z Unlike most other forms of biomass such as cellulose, chitin contains nitrogen. Sustainability: Don't waste seafood waste 2015-08-09T04:00:00Z Butterfly wings get their color from naturally occurring photonic crystal structures in scales made of chitin, a polysaccharide that shows up in all kinds of insects. Shiny! On the Iridescence of Squid 2012-08-25T22:45:00.177Z In older mice that are missing AMCase, the airways contained more chitin than did the airways of control rodents of the same age. Enzyme saves us from insect dust and worm skin 2017-04-20T04:00:00Z Rather than start from scratch, researchers spun threads of chitin from liquefied shrimp shells. How To Power Nuclear Reactors For Another Century 2012-08-21T21:45:02.807Z It’s made of chitin, like an insect exoskeleton, and consists of a ribbon of tiny teeth attached to a membrane. Rumors of the Oblong Rocksnail's Demise Were Somewhat Exaggerated 2012-08-08T22:15:00.450Z Natural chitin is a crystalline material that prevents reagents from easily accessing the polymer chains. Sustainability: Don't waste seafood waste 2015-08-09T04:00:00Z Under that arerods of material called chitin, stacked at different angles, which helps prevent fractures from growing. Observatory: Peacock Mantis Shrimp Has a Knockout Punch 2012-06-11T18:05:52Z “It’s one of the first studies that shows evidence that there’s chitin present in patients who develop a lung disease.” Enzyme saves us from insect dust and worm skin 2017-04-20T04:00:00Z Casting aside his chitin covering in an agony of release, he tested his new body parts slowly, then stumbled forward. The Making of a Mutant: A Fruit Fly Love Story 2012-04-15T01:15:00.220Z The cuticle is a dead substance, and is composed in large part of chitin. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z It needs a sustainable fractionation method to separate proteins, calcium carbonate and chitin — one that avoids corrosive or hazardous reagents and minimizes waste. Sustainability: Don't waste seafood waste 2015-08-09T04:00:00Z The final region, along the sides of the claw, is also made up of chitin and helps place the rest of the club under compression. Observatory: Peacock Mantis Shrimp Has a Knockout Punch 2012-06-11T18:05:52Z This made the animals’ exoskeletons, which are composed of a sugar-based polymer called chitin, fluoresce—thus revealing details of their surface features. Biomimetics: Not a scratch 2012-02-02T16:03:12Z Researchers at Harvard’s Wyss Institute for Biologically Inspired Engineering analyzed insect cuticle, which includes chitin and other proteins, such as the fibroin also found in spider silk. Insect Cuticle Inspires New Material 2011-12-21T01:15:00.263Z And another thing was the durability of chitin. Jungle Peace 2011-10-06T02:00:42.363Z The transformation of chitin or chitosan to other chemicals poses further problems. Sustainability: Don't waste seafood waste 2015-08-09T04:00:00Z Skeleton delicate, with the branches diverging widely, exhibiting the characteristic structure of the genus in a marked degree, containing a considerable amount of chitin, which renders it resistant in spite of its delicacy. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z But what sets the cryptomycota apart from the rest of the fungi is their lack of a cell wall made from chitin, the chemical from which insect exoskeletons are built. The Evolutionary Tree of Fungi Grows a New Branch 2011-05-11T21:15:00.400Z They then devised a method to produce a material made up of layers of chitin and fibroin. Insect Cuticle Inspires New Material 2011-12-21T01:15:00.263Z The current study builds on research suggesting that targeting chitin, which forms a protective outer layer during the parasite's larval stage, may offer a new target. 2010-02-09T00:12:00Z They are lined internally by a cuticular deposit of chitin. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" Its head is probably too thickly coated with chitin to excite their discharge. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z They yield chitin in place of chondrin or gelatin—as does also the cartilage of the Cephalopod’s endoskeleton. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 "Apollodorus" to "Aral" They call the stuff “shrilk” - a combination of shrimp, as discarded shrimp shells are a good source of chitin, and silk. Insect Cuticle Inspires New Material 2011-12-21T01:15:00.263Z In Lingula the shell is composed of alternate layers of chitin and of phosphate of lime. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" This chitin diaphragm picks up the microwave like our ears pick up sound. The Kenzie Report The alien had an endoskeleton, but he also had a hide that was like somewhat leathery chitin. Anything You Can Do! The alien had an endoskeleton, but he also had a tough hide that was somewhat like thick, leathery chitin. Anything You Can Do ... But we were pretty startled to find that the only wreckage consisted of the Mancji themselves, each two-ton slug in his own hard chitin shell. Greylorn Chitinogenous: applied to that layer of epidermal cells which secretes the chitin. Explanation of Terms Used in Entomology It is proved, therefore, that the tissues of the fungi do contain a product resembling chitin. Researches on Cellulose 1895-1900 Running all through between the two layers of the wing are thickened lines of chitin, which divide and subdivide, forming this fine network. Little Busybodies The Life of Crickets, Ants, Bees, Beetles, and Other Busybodies The Ordovician period was marked by abundant representation of the once very successful class of Trilobites—jointed-footed, antenna-bearing, segmented marine animals, with numerous appendages and a covering of chitin. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told It is made of chitin; it is an outside skeleton. The Insect Folk Ossicle: a small nodule of chitin resembling a bone. Explanation of Terms Used in Entomology This group is closely related to chitin, yielding glucosamin and acetic acid as products of ultimate hydrolysis. Researches on Cellulose 1895-1900 You see, the chitin acts both as armor-plate for the soft parts and also as a firm support to the many muscles. Little Busybodies The Life of Crickets, Ants, Bees, Beetles, and Other Busybodies They are worked by powerful muscles, and are supported, like a fan, by ribs of chitin, which may be accompanied by air-tubes, blood-channels, and nerves. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told There is no chitin in the skin between the segments. The Insect Folk Platelet: a little plate or sclerite of chitin in a membrane. Explanation of Terms Used in Entomology The form is ovoid or globular, and the body is covered by a tightly fitting, plastic, chitin shell, which, in turn, is covered by a fine layer of protoplasm. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 From end to end of the tube is a fine thread of chitin twisted in a close spiral like a spring. Little Busybodies The Life of Crickets, Ants, Bees, Beetles, and Other Busybodies Transverse muscles, running parallel to the unyielding plates of chitin or horn could accomplish nothing. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895 Yes, indeed, little Nell, the segments of the thorax are made of chitin; they are very stiff. The Insect Folk Ned thinks the segments of the legs are made of chitin too. The Insect Folk The chitin of the shell is covered with silicious particles of diverse size. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 Yes, May, this little cast is made of chitin, and it will last a long time. The Insect Folk The minerals and gases that compose them let go of each other, as it were, and the chitin is no longer chitin. The Insect Folk |
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