Morphological Transitions in Patchy Nanoparticles

ACS Nano ◽  
2020 ◽  
Vol 14 (4) ◽  
pp. 4577-4584
Author(s):  
Elizabeth Galati ◽  
Huachen Tao ◽  
Christian Rossner ◽  
Ekaterina B. Zhulina ◽  
Eugenia Kumacheva
Keyword(s):  
Morphological Transitions ◽  
Patchy Nanoparticles

Gram-scale fabrication of patchy nanoparticles with tunable spatial topology and chemical functionality

Nano Research ◽  
2021 ◽  
Author(s):  
Jiecheng Cui ◽  
Yi Li ◽  
Huili Yuan ◽  
Ning Gao ◽  
Kai Feng ◽  
...  
Keyword(s):  
Spatial Topology ◽  
Chemical Functionality ◽  
Patchy Nanoparticles

scholarly journals Stimulus-responsive block copolymer nano-objects and hydrogels via dynamic covalent chemistry

2017 ◽  
Vol 8 (35) ◽  
pp. 5374-5380 ◽  
Author(s):  
Renhua Deng ◽  
Yin Ning ◽  
Elizabeth R. Jones ◽  
Victoria J. Cunningham ◽  
Nicholas J. W. Penfold ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Alkaline Solution ◽  
Dynamic Covalent Chemistry ◽  
Stimulus Responsive ◽  
Morphological Transitions

Dynamic covalent chemistry can be used to induce reversible morphological transitions for block copolymer nano-objects in mildly alkaline solution.

scholarly journals The Cek1 and Hog1 Mitogen-Activated Protein Kinases Play Complementary Roles in Cell Wall Biogenesis and Chlamydospore Formation in the Fungal Pathogen Candida albicans

2006 ◽  
Vol 5 (2) ◽  
pp. 347-358 ◽  
Author(s):  
B. Eisman ◽  
R. Alonso-Monge ◽  
E. Román ◽  
D. Arana ◽  
C. Nombela ◽  
...  
Keyword(s):  
Cell Wall ◽  
Candida Albicans ◽  
Map Kinase ◽  
Fungal Pathogen ◽  
Hog Pathway ◽  
Cell Wall Biogenesis ◽  
Chlamydospore Formation ◽  
Mitogen Activated Protein ◽  
Morphological Transitions ◽  
Relationship Of

ABSTRACT The Hog1 mitogen-activated protein (MAP) kinase mediates an adaptive response to both osmotic and oxidative stress in the fungal pathogen Candida albicans. This protein also participates in two distinct morphogenetic processes, namely the yeast-to-hypha transition (as a repressor) and chlamydospore formation (as an inducer). We show here that repression of filamentous growth occurs both under serum limitation and under other partially inducing conditions, such as low temperature, low pH, or nitrogen starvation. To understand the relationship of the HOG pathway to other MAP kinase cascades that also play a role in morphological transitions, we have constructed and characterized a set of double mutants in which we deleted both the HOG1 gene and other signaling elements (the CST20, CLA4, and HST7 kinases, the CPH1 and EFG1 transcription factors, and the CPP1 protein phosphatase). We also show that Hog1 prevents the yeast-to-hypha switch independent of all the elements analyzed and that the inability of the hog1 mutants to form chlamydospores is suppressed when additional elements of the CEK1 pathway (CST20 or HST7) are altered. Finally, we report that Hog1 represses the activation of the Cek1 MAP kinase under basal conditions and that Cek1 activation correlates with resistance to certain cell wall inhibitors (such as Congo red), demonstrating a role for this pathway in cell wall biogenesis.

scholarly journals Universal fractality of morphological transitions in stochastic growth processes

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
J. R. Nicolás-Carlock ◽  
J. L. Carrillo-Estrada ◽  
V. Dossetti
Keyword(s):  
Growth Processes ◽  
Stochastic Growth ◽  
Morphological Transitions

scholarly journals Morphological transition of silicate crystals solidified from highly undercooled aerodynamically levitated melt droplets

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Ganesh Shete ◽  
Shyamprasad Karagadde ◽  
Atul Srivastava
Keyword(s):  
Magnesium Silicate ◽  
Model Material ◽  
Morphological Transition ◽  
Metallic System ◽  
Dendritic Microstructure ◽  
Contact Conditions ◽  
Cooling Rates ◽  
Morphological Transitions ◽  
Aerodynamic Levitation ◽  
Scanning Electron

AbstractThe present work reports the morphological transition during solidification of a non-metallic system. Pure magnesium silicate (Mg2SiO4) is chosen as the model material and the solidification experiments have been conducted under purely non-contact conditions using the principles of aerodynamic levitation. The influence of the undercooling and cooling rates on the surface features observed in the solidified samples is investigated. Levitation experiments have been performed for different samples, which are solidified for a range of undercooling levels between 360 to 1100° C. In order to understand and report the morphological transitions, solidified samples have been observed using scanning electron microscopy, which showed the formation of highly branched faceted microstructure for an undercooling regime of 360–800° C, and non-dendritic microstructure for even higher undercooling regime of 800–1100° C. Further experiments performed on this non-metallic system for different cooling rates also suggested that, regardless of the cooling rate, lower undercooling leads to branched faceted features, whereas higher undercooling results into unbranched facets. The methodology and instrumentation provide unique capabilities to probe the behavior of materials at high temperatures.

Assembly of Zeolitic Crystals From a Model of Mesogenic Patchy Nanoparticles

2018 ◽  
Vol 123 (1) ◽  
pp. 971-978 ◽  
Author(s):  
Abhinaw Kumar ◽  
Maryam Zare ◽  
Valeria Molinero
Keyword(s):  
Patchy Nanoparticles
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