A New Approach for Synthesizing the Hybrid Silica Aerogels

Physical hydrogels self-assembled from GO and SiO2–NH2 nanoparticles are observed, and they could be transferred into corresponding ultralow density aerogels.

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CO2 adsorption performances of amine hybrid silica aerogels synthesised via in-situ polymerisation of hybrid precursors

International Journal of Global Warming ◽

10.1504/ijgw.2019.103724 ◽

2019 ◽

Vol 19 (3) ◽

pp. 324

Author(s):

Jiayue Zhang ◽

Yong Kong ◽

Xiaodong Shen

Keyword(s):

Silica Aerogels ◽

Hybrid Silica

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A new trend for development of mechanically robust hybrid silica aerogels

Materials Letters ◽

10.1016/j.matlet.2016.05.085 ◽

2016 ◽

Vol 179 ◽

pp. 206-209 ◽

Cited By ~ 13

Author(s):

Hajar Maleki ◽

Luísa Durães ◽

António Portugal

Keyword(s):

Silica Aerogels ◽

Hybrid Silica

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Nanostructuring of Hybrid Silicas: New Approach to Bridged Silsesquioxanes with Purine-Pyrimidine Base Pairs as Bridging Units

MRS Proceedings ◽

10.1557/proc-1007-s02-03 ◽

2007 ◽

Vol 1007 ◽

Author(s):

Michel Wong Chi Man ◽

Guilhem Arrachart ◽

Carole Carcel ◽

Joël J.E. Moreau ◽

Christian Bonhomme ◽

...

Keyword(s):

Powdered Sample ◽

X Ray Diffraction ◽

Base Pairs ◽

New Approach ◽

X Ray ◽

Hybrid Silica ◽

Hybrid Silicas ◽

Bridged Silsesquioxanes ◽

Hydrolysis Of ◽

Purine Pyrimidine

ABSTRACTA new route to synthesize hybrid silica-based network with bridging organic units via molecular recognition is described. The hydrolysis of two monosilylated complementary base pairs, one bearing an adenine fragment and the other a thymine fragment leads to the formation of a powdered sample that has been characterized by Scanning Electron Microscopy (SEM), Powder X-ray Diffraction (PXRD) FTIR and solid state NMR (1H, 13C and 29Si). This last technique proved to be extremely powerful to directly demonstrate the occurrence of heteroassembly of the nucleobase-based silylated fragments, through the use of two-dimensional 1H double-quanta MAS-NMR that could probe spatial proximities between the thymine NH groups and the adenine NH2 groups.

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Design of multifunctional magnetic hybrid silica aerogels with improved properties

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2016.06.025 ◽

2016 ◽

Vol 232 ◽

pp. 227-237 ◽

Cited By ~ 6

Author(s):

Hajar Maleki ◽

Luísa Durães ◽

Benilde F.O. Costa ◽

Rúben F. Santos ◽

António Portugal

Keyword(s):

Silica Aerogels ◽

Hybrid Silica

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The O–C diagrams of minor planets − a new approach to modelling the rotation

International Astronomical Union Colloquium ◽

10.1017/s0252921100031407 ◽

1999 ◽

Vol 173 ◽

pp. 185-188

Author(s):

Gy. Szabó ◽

K. Sárneczky ◽

L.L. Kiss

Keyword(s):

Error Analysis ◽

Time Dependence ◽

Theoretical Work ◽

Minor Planet ◽

Minor Planets ◽

New Approach ◽

Preliminary Results ◽

Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

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A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100073933 ◽

1973 ◽

Vol 31 ◽

pp. 698-699

Author(s):

V. Mizuhira ◽

Y. Futaesaku

Keyword(s):

Cross Section ◽

Tannic Acid ◽

Elastic Fiber ◽

The Other ◽

New Approach ◽

Tissue Block ◽

Active Reaction ◽

The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

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Processing Immunoperoxidase Labeled Cell Monolayers and Cryostat Sesctions For Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100120266 ◽

1985 ◽

Vol 43 ◽

pp. 714-715

Author(s):

K. Chien ◽

R. Van de Velde ◽

I.P. Shintaku ◽

A.F. Sassoon

Keyword(s):

Cell Monolayer ◽

Cell Types ◽

Surface Antigens ◽

Immunoperoxidase Method ◽

Reaction Step ◽

Hot Plate ◽

Air Drying ◽

New Approach ◽

Cell Monolayers ◽

Glass Slides

Immunoelectron microscopy of neoplastic lymphoma cells is valuable for precise localization of surface antigens and identification of cell types. We have developed a new approach in which the immunohistochemical staining can be evaluated prior to embedding for EM and desired area subsequently selected for ultrathin sectioning.A freshly prepared lymphoma cell suspension is spun onto polylysine hydrobromide- coated glass slides by cytocentrifugation and immediately fixed without air drying in polylysine paraformaldehyde (PLP) fixative. After rinsing in PBS, slides are stained by a 3-step immunoperoxidase method. Cell monolayer is then fixed in buffered 3% glutaraldehyde prior to DAB reaction. After the DAB reaction step, wet monolayers can be examined under LM for presence of brown reaction product and selected monolayers then processed by routine methods for EM and embedded with the Chien Re-embedding Mold. After the polymerization, the epoxy blocks are easily separated from the glass slides by heatingon a 100°C hot plate for 20 seconds.

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TEM study of a biofilm on copper corrosion

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100163563 ◽

1996 ◽

Vol 54 ◽

pp. 220-221

Author(s):

W. A. Chiou ◽

N. Kohyama ◽

B. Little ◽

P. Wagner ◽

M. Meshii

Keyword(s):

Marine Bacterium ◽

Culture Medium ◽

Copper Alloys ◽

Pure Copper ◽

Localized Corrosion ◽

Natural Seawater ◽

Copper Corrosion ◽

New Approach ◽

The Past ◽

Copper Tolerant

The corrosion of copper and copper alloys in a marine environment is of great concern because of their widespread use in heat exchangers and steam condensers in which natural seawater is the coolant. It has become increasingly evident that microorganisms play an important role in the corrosion of a number of metals and alloys under a variety of environments. For the past 15 years the use of SEM has proven to be useful in studying biofilms and spatial relationships between bacteria and localized corrosion of metals. Little information, however, has been obtained using TEM capitalizing on its higher spacial resolution and the transmission observation of interfaces. The research presented herein is the first step of this new approach in studying the corrosion with biological influence in pure copper.Commercially produced copper (Cu, 99%) foils of approximately 120 μm thick exposed to a copper-tolerant marine bacterium, Oceanospirillum, and an abiotic culture medium were subsampled (1 cm × 1 cm) for this study along with unexposed control samples.

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