搜索结果: 1-15 共查到“Shape”相关记录499条 . 查询时间(0.078 秒)
Dynamic covalent bonds in self-healing, shape memory, and controllable stiffness hydrogels
Thiol-thioester exchange double-network hydrogels chitosan-based hydrogels on-demand dissolution acid-based hydrogels
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2024/1/11
Emerging technologies are increasingly reliant on materials that deliver multiple functionality. For example, hydrogels using dynamic covalent crosslinks have proven well-suited for the preparation of...
Developing Reprocessable shape memory thermosetting resins with high thermal resistance and strength through building a crosslinked network based on bismaleimide and epoxy resins
dynamic covalent bond heat resistance mechanical property reprocessability shape memory thermosetting resin
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2023/11/16
It is difficult to endow reprocessable shape memory thermosetting resins with outstanding heat resistance and high mechanical strength. Herein, a new kind of reprocessable shape memory thermosetting r...
River erosion can shape fish evolution, study suggests（图）
河流侵蚀 鱼类 进化 生物多样性
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2023/6/21
If we could rewind the tape of species evolution around the world and play it forward over hundreds of millions of years to the present day, we would see biodiversity clustering around regions of tect...
Artificially Selected Grain Shape Gene Combinations in Guangdong Simiao Varieties of Rice (Oryza sativa L.)
Guangdong Simiao varieties Grain shape Fixation index Allele mining Molecular breeding Rice
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2023/4/21
Grain shape is a key trait in rice breeding. Although many QTLs and genes of grain shape have been identified, how different combinations of alleles of these genes affect grain shape is largely unknow...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Shape-on-Scalar Regression Models: Going Beyond Prealigned Non-Euclidean Responses
标量 形状回归模型 超越预先对齐 非欧几里得
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2023/5/5
The problem of using covariates to predict shapes of objects in a regression setting is important in many fields. A formal statistical approach, termed geodesic regression model, is commonly used for ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The Application of Continuous Adjoint Method for Shape Optimization in Navier-Stokes Flow
连续伴随法 纳维-斯托克斯流 形状优化
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2023/5/8
In this work, the shape optimization problem of a solid immersed in the incompressible fluid governed by Navier-Stokes equations is considered. Based on the continuous adjoint method, the shape gradie...
Engineers develop a new kind of shape-memory material（图）
形状记忆材料 陶瓷基材料 材料科学
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2023/6/6
Shape-memory metals, which can revert from one shape to a different one simply by being warmed or otherwise triggered, have been useful in a variety of applications, as actuators that can control the ...
How a shape-shifting receptor influences cell growth（图）
变形受体 细胞生长 EGF受体 新癌症药物
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2023/6/5
Receptors found on cell surfaces bind to hormones, proteins, and other molecules, helping cells respond to their environment. MIT chemists have now discovered how one of these receptors changes its sh...
Cellular environments shape molecular architecture（图）
细胞 环境塑造 分子结构
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2023/6/6
Context matters. It’s true for many facets of life, including the tiny molecular machines that perform vital functions inside our cells.
Body size, digestive systems shape ungulate foraging
body size digestive system ngulate plant
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2021/8/5
Smaller-bodied ruminants forage primarily for the highest energy intake, while equids -- which tend to be larger -- choose to forage in areas close to surface water, with less attention to forage cond...
Chemists invent shape-shifting nanomaterial（图）
Chemists shape-shifting nanomaterial
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2021/1/28
Chemists have developed a nanomaterial they can trigger to shape-shift -- from flat sheets to tubes and back to sheets again -- in a controllable fashion. The Journal of the American Chemical Soc...
Researchers engineer tiny, shape-changing machines that deliver medicine to the GI tract（图）
engineer tiny shape-changing machines deliver medicine GI tract
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2020/11/13
Inspired by a parasitic worm that digs its sharp teeth into its host's intestines, Johns Hopkins University researchers have designed tiny, star-shaped microdevices that latch onto intestina...
Dueling proteins give shape to plants（图）
Dueling proteins shape plants
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2020/10/23
In an elegant choreography, plants take cues from their environment and channel them into forms: flowers, roots and branches. In a new paper published in Nature Communications, biologist Doris Wa...
Hurricanes fertilize mangrove forests, shape Florida Everglades（图）
Hurricanes mangrove forests shape Florida Everglades
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2020/2/28
The destructive power of a hurricane appears to be good news for mangroves in the Florida Everglades.When Category 3 hurricanes Wilma (2005) and Irma (2017) struck Florida, mangroves took a beating, e...
Researchers learn how the cancer-causing stomach bacterium Helicobacter maintains its shape（图）
Researchers cancer-causing stomach bacterium Helicobacter
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2020/2/20
NSF-funded scientists reporting in the journal eLife have revealed that they are closer to understanding a risk factor for stomach cancer: how the bacterium Helicobacter pylori...