English Journal
- Modes of deformation of walled cells.
- Dumais J.Author information Facultad de Ingeniería y Ciencias and Centro de Innovación en Bioingeniería, Universidad Adolfo Ibáñez, Viña del Mar, Chile.AbstractThe bewildering morphological diversity found in cells is one of the starkest illustrations of life's ability to self-organize. Yet the morphogenetic mechanisms that produce the multifarious shapes of cells are still poorly understood. The shared similarities between the walled cells of prokaryotes, many protists, fungi, and plants make these groups particularly appealing to begin investigating how morphological diversity is generated at the cell level. In this review, I attempt a first classification of the different modes of surface deformation used by walled cells. Five modes of deformation were identified: inextensional bending, equi-area shear, elastic stretching, processive intussusception, and chemorheological growth. The two most restrictive modes-inextensional and equi-area deformations-are embodied in the exine of pollen grains and the wall-like pellicle of euglenoids, respectively. For these modes, it is possible to express the deformed geometry of the cell explicitly in terms of the undeformed geometry and other easily observable geometrical parameters. The greatest morphogenetic power is reached with the processive intussusception and chemorheological growth mechanisms that underlie the expansive growth of walled cells. A comparison of these two growth mechanisms suggests a possible way to tackle the complexity behind wall growth.
- Journal of experimental botany.J Exp Bot.2013 Nov;64(15):4681-95. doi: 10.1093/jxb/ert268. Epub 2013 Sep 7.
- The bewildering morphological diversity found in cells is one of the starkest illustrations of life's ability to self-organize. Yet the morphogenetic mechanisms that produce the multifarious shapes of cells are still poorly understood. The shared similarities between the walled cells of prokaryotes,
- PMID 24014868
- [Effects of tanyu tongzhi recipe on hemorheology, blood lipid and inflammatory factors in rats with mycardial ischemia-reperfusion injury and hyperlipidemia].
- Tang DL1, Tong L, Zhang HM, Sui Y, Cui HF.Author information 1Experimental Research Center of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, China.AbstractOBJECTIVE: To investigate the influence of Tanyu Tongzhi (TYTZ) recipe on chemorheology, blood lipid and inflammatory factors of hyperlipidemia and myocardial ischemia-reperfusion injury in rats.
- Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica.Zhongguo Zhong Yao Za Zhi.2013 Jan;38(2):249-52.
- OBJECTIVE: To investigate the influence of Tanyu Tongzhi (TYTZ) recipe on chemorheology, blood lipid and inflammatory factors of hyperlipidemia and myocardial ischemia-reperfusion injury in rats.METHOD: Sixty SD male rats were divided into 5 groups randomly, sham-operated group, model group, high do
- PMID 23672051
- Chemorheology of phenylboronate-salicylhydroxamate crosslinked hydrogel networks with a sulfonated polymer backbone.
- Roberts MC1, Mahalingam A, Hanson MC, Kiser PF.Author information 1University of Utah, Department of Bioengineering and Department of Pharmaceutics and Pharmaceutical Chemistry, 20 S 2030 E Room 108, Salt Lake City, Utah 84112.AbstractHydrogel networks crosslinked with polymer-bound phenylboronic acid (PBA) and salicylhydroxamic acid (SHA) demonstrate pH-reversible gel behavior due to the pH-dependent equilibrium of the crosslinking moieties that form the gel network. Furthermore, the pH at which gels behave dynamically can be controlled by use of a polyelectrolyte backbone. Here we report on the frequency-dependent chemorheological characterization of PBA-SHA crosslinked hydrogel networks with a sulfonated polymer backbone. Our results suggest that the anionic nature of the polymers allows reversible crosslinking at neutral pH that an otherwise neutral-backboned PBA-SHA crosslinked network cannot, and that these charge-induced dynamics can be effectively screened by ions in solution. Moreover, moduli-frequency data can effectively be reduced into a single master curve with a neutral-backboned PBA-SHA gel data set as the reference condition.
- Macromolecules.Macromolecules.2008 Nov 25;41(22):8832-8840.
- Hydrogel networks crosslinked with polymer-bound phenylboronic acid (PBA) and salicylhydroxamic acid (SHA) demonstrate pH-reversible gel behavior due to the pH-dependent equilibrium of the crosslinking moieties that form the gel network. Furthermore, the pH at which gels behave dynamically can be co
- PMID 23132956
Japanese Journal
- 高フィラー充填エポキシ樹脂の硬化過程での粘弾性挙動
- 黒木 基弘,高橋 秀明,石室 良孝
- 日本レオロジー学会誌 27(4), 235-241, 1999-12-01
- … Chemorheology of an epoxy resin with 90wt% silica fillers was investigated using a parallel-plates viscometer. …
- NAID 10005145862
- 化学レオロジーによる架橋高分子の架橋点間重合度分布の簡易迅速決定法
- 村上 謙吉,及川 英俊,徐 卿道
- 日本レオロジー学会誌 17(1), 13-18, 1989
- It is still impossible to estimate the distribution of the molecular-weight (chain-length) between two crosslinks of a crosslinked polymer, because of its insolubility and infusibility. The distributi …
- NAID 130004700133
- 村上 謙吉,及川 英俊,長井 剛
- 日本レオロジー学会誌 17(2), 77-85, 1989
- … Chemorheology is the best means to elucidate the degradation mechanism of cross-linked polymer at its initial stage. …
- NAID 130004661806
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