نتایج جستجو برای: silk suture

تعداد نتایج: 21085  

Journal: :Biochemistry 2004
Ping Zhou Xun Xie David P Knight Xiao-Hong Zong Feng Deng Wen-Hua Yao

Silk fibroin exists in a number of different states, such as silk I and silk II, with different properties largely defined by differences in secondary structure composition. Numerous attempts have been made to control the transitions from silk I to silk II in vitro to produce high-performance materials. Of all the factors influencing the structural compositions, pH and some metal ions play impo...

Journal: :Biomacromolecules 2010
Russell J Stewart Ching Shuen Wang

Aquatic caddisflies diverged from a silk-spinning ancestor shared with terrestrial moths and butterflies. Caddisfly larva spin adhesive silk underwater to construct protective shelters with adventitiously gathered materials. A repeating (SX)(n) motif conserved in the H-fibroin of several caddisfly species is densely phosphorylated. In total, more than half of the serines in caddisfly silk may b...

Journal: :Biomacromolecules 2004
Barbara A Lawrence Craig A Vierra Anne M F Moore

Molecular and material properties of major ampullate silk were studied for the cobweb-building black widow spider Latrodectus hesperus. Material properties were measured by stretching the silk to breaking. The strength was 1.0 +/- 0.2 GPa, and the extensibility was 34 +/- 8%. The secondary structure of the major ampullate silk protein was studied using carbon-13 NMR spectroscopy. Alanine underg...

2013
Ning Cheng Yuanqin Wang Yufeng Zhang Bin Shi

Silk-based scaffolds have been introduced to bone tissue regeneration for years, however, their local therapeutic efficiency in bone metabolic disease condition has been seldom reported. According to our previous report, mesoporous bioactive glass (MBG)/silk scaffolds exhibits superior in vitro bioactivity and in vivo osteogenic properties compared to non-mesoporous bioactive glass (BG)/silk sc...

Journal: :Journal of experimental zoology. Part A, Ecological genetics and physiology 2008
Ingi Agnarsson Cecilia Boutry Todd A Blackledge

Spider silk possesses a unique combination of high tensile strength and elasticity resulting in extraordinarily tough fibers, compared with the best synthetic materials. However, the potential application of spider silk and biomimetic fibers depends upon retention of their high performance under a variety of conditions. Here, we report on changes in the mechanical properties of dragline and cap...

2016
Luc Thévenaz Kenny Hey Tow Desmond Chow Fritz Vollrath

Several research teams have recently highlighted how silk can be used as an optical material. Through a regeneration process, it is possible to obtain silk films made from fibers of silk cocoons, by casting a silk fibron solution on an appropriate surface. These transparent films have been used tomake optical devices such as diffraction gratings, phase masks, and photonic crystal lattices.1 Our...

Journal: :Journal of visualized experiments : JoVE 2011
Felicia Jeffery Coby La Mattina Tiffany Tuton-Blasingame Yang Hsia Eric Gnesa Liang Zhao Andreas Franz Craig Vierra

Modern spiders spin high-performance silk fibers with a broad range of biological functions, including locomotion, prey capture and protection of developing offspring. Spiders accomplish these tasks by spinning several distinct fiber types that have diverse mechanical properties. Such specialization of fiber types has occurred through the evolution of different silk-producing glands, which func...

2012
Andrew A. Walker Sarah Weisman Jeffrey S. Church David J. Merritt Stephen T. Mudie Tara D. Sutherland

Raspy crickets (Orthoptera: Gryllacrididae) are unique among the orthopterans in producing silk, which is used to build shelters. This work studied the material composition and the fabrication of cricket silk for the first time. We examined silk-webs produced in captivity, which comprised cylindrical fibers and flat films. Spectra obtained from micro-Raman experiments indicated that the silk is...

2015
Huaipu Chang Tingcai Cheng Yuqian Wu Wenbo Hu Renwen Long Chun Liu Ping Zhao Qingyou Xia Erjun Ling

Silk proteins are synthesized in the middle and posterior silk glands of silkworms, then transit into the anterior of the silk gland, where the silk fibers are produced, stored and processed. The mechanism of formation and spinning of the silk fibers has not been fully elucidated, and transcriptome analyses specific to the anterior silk gland have not been reported. In the present study, we exp...

2016
Shigeharu Takiya Takuya Tsubota Mai Kimoto

The silk gland of the silkworm Bombyx mori is a long tubular organ that is divided into several subparts along its anteroposterior (AP) axis. As a trait of terminal differentiation of the silk gland, several silk protein genes are expressed with unique regional specificities. Most of the Hox and some of the homeobox genes are also expressed in the differentiated silk gland with regional specifi...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید