Identical Composition and Distinct Performance: How ZIF-8 Polymorphs’ Structures Affect the Adsorption/Separation of Ethane and Ethene

2021 ◽  
Author(s):  
Qia Ke ◽  
Yifan Duan ◽  
Yiran Ji ◽  
Daohui Zhao ◽  
Haoqing Zhang ◽  
...  
Keyword(s):  
Identical Composition

point-Analysis Using the Extrapolation Method in the Analytical Electron microscope

1990 ◽  
Vol 48 (2) ◽  
pp. 430-431
Author(s):  
Zenji Horita ◽  
Ryuzo Nishimachi ◽  
Takeshi Sano ◽  
Minoru Nemoto
Keyword(s):  
Electron Microscope ◽  
Extrapolation Method ◽  
X Ray ◽  
Absorption Correction ◽  
Point Analysis ◽  
Analytical Electron ◽  
Analytical Electron Microscope ◽  
Data Points ◽  
Identical Composition ◽  
X Ray Absorption

Absorption correction is often required in quantitative x-ray microanalysis of thin specimens using the analytical electron microscope. For such correction, it is convenient to use the extrapolation method[l] because the thickness, density and mass absorption coefficient are not necessary in the method. The characteristic x-ray intensities measured for the analysis are only requirement for the absorption correction. However, to achieve extrapolation, it is imperative to obtain data points more than two at different thicknesses in the identical composition. Thus, the method encounters difficulty in analyzing a region equivalent to beam size or the specimen with uniform thickness. The purpose of this study is to modify the method so that extrapolation becomes feasible in such limited conditions. Applicability of the new form is examined by using a standard sample and then it is applied to quantification of phases in a Ni-Al-W ternary alloy.The earlier equation for the extrapolation method was formulated based on the facts that the magnitude of x-ray absorption increases with increasing thickness and that the intensity of a characteristic x-ray exhibiting negligible absorption in the specimen is used as a measure of thickness.

scholarly journals Mineralization of 3D Osteogenic Model Based on Gelatin-Dextran Hybrid Hydrogel Scaffold Bioengineered with Mesenchymal Stromal Cells: A Multiparametric Evaluation

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3852
Author(s):  
Federica Re ◽  
Luciana Sartore ◽  
Elisa Borsani ◽  
Matteo Ferroni ◽  
Camilla Baratto ◽  
...  
Keyword(s):  
Mesenchymal Stromal Cells ◽  
Stromal Cells ◽  
Bone Repair ◽  
Active Role ◽  
Ionization Mass ◽  
Hydrogel Scaffold ◽  
Hybrid Hydrogel ◽  
Hydrogel Scaffolds ◽  
Human Platelet Lysate ◽  
Identical Composition

Gelatin–dextran hydrogel scaffolds (G-PEG-Dx) were evaluated for their ability to activate the bone marrow human mesenchymal stromal cells (BM-hMSCs) towards mineralization. G-PEG-Dx1 and G-PEG-Dx2, with identical composition but different architecture, were seeded with BM-hMSCs in presence of fetal bovine serum or human platelet lysate (hPL) with or without osteogenic medium. G-PEG-Dx1, characterized by a lower degree of crosslinking and larger pores, was able to induce a better cell colonization than G-PEG-Dx2. At day 28, G-PEG-Dx2, with hPL and osteogenic factors, was more efficient than G-PEG-Dx1 in inducing mineralization. Scanning electron microscopy (SEM) and Raman spectroscopy showed that extracellular matrix produced by BM-hMSCs and calcium-positive mineralization were present along the backbone of the G-PEG-Dx2, even though it was colonized to a lesser degree by hMSCs than G-PEG-Dx1. These findings were confirmed by matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI), detecting distinct lipidomic signatures that were associated with the different degree of scaffold mineralization. Our data show that the architecture and morphology of G-PEG-Dx2 is determinant and better than that of G-PEG-Dx1 in promoting a faster mineralization, suggesting a more favorable and active role for improving bone repair.

scholarly journals A revision of Annularia and Asterophyllites species from the lower Westphalian (Middle Pennsylvanian) of the Maritime Provinces of Canada

2017 ◽  
Vol 53 ◽  
pp. 017-062 ◽  
Author(s):  
Carmen Álvarez-Vázquez ◽  
Robert H. Wagner
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
Western Europe ◽  
Maritime Provinces ◽  
Geographic Ranges ◽  
European Literature ◽  
Scant Attention ◽  
Identical Composition

As part of a larger project to revise the systematics of lower Westphalian floras of Nova Scotia and New Brunswick, the sphenopsid taxa are presently reviewed. We recognize 15 species, of which one, Annularia stopesiae, is new. Detailed synonymy lists allow a refinement of the stratigraphic and geographic ranges of these species. Scant attention has been paid previously to Canadian species in the European literature. For example, Annularia latifolia was described later from Europe as Annularia jongmansii. The identical composition of Westphalian floras from Canada and western Europe is striking.

Les structures annulaires des granites des 'taourirts' en Ahaggar occidental (Sahara)

1963 ◽  
Vol S7-V (5) ◽  
pp. 695-700
Author(s):  
Jean Boissonnas
Keyword(s):  
Grain Size ◽  
Eastern Boundary ◽  
Two Generations ◽  
Ring Structures ◽  
Identical Composition

Abstract A swarm of granite massifs outcrops in the Pharusian structural basin of western Ahaggar (Algeria) not far from the major dislocation marking the eastern boundary of the basin, and separating two distinct areas. The granites appear as ring structures; two phenomena caused these features: the emplacement of several successive porphyroid granites, each one having identical composition but varying in grain size, and the formation of thick rings with relatively alkaline and leucocratic borders. Two generations of massifs are apparent and differ in their alkaline marginal facies, in their complexity, and in their geographic situation. The plutons of western Ahaggar and the subvolcanic structures of Nigeria have certain aspects of their structure in common. Nevertheless, the 'taourirts' are older and less evolved than those of Nigeria.

Characterization of the somatostatin-like immunoreactivity extracted from an adrenal medullary tumour

1982 ◽  
Vol 2 (3) ◽  
pp. 147-154 ◽  
Author(s):  
R. Corder ◽  
J. E. C. Sykes ◽  
P. J. Lowry
Keyword(s):  
Growth Hormone ◽  
Anterior Pituitary ◽  
Gel Filtration ◽  
Hormone Release ◽  
Growth Hormone Release ◽  
Identical Composition ◽  
Salt Fractionation ◽  
Somatostatin 14

Significant amounts of somatostatin-like immunor reactivity (SLI) were detected in the extract of a human catecholamine-secreting adrenal medullary tumour. After salt fractionation and reconstitution the major portion of SLI was purified by gel filtration and two HPLC steps; in all three systems it eluted in the position of somatostatin-14. The purified somatostatin-like peptide inhibited, in a dose-related manner, growth hormone release from stimulated perfused rat anterior pituitary ceils in vitro. Amino acid analysis showed the purified peptide to have an identical composition to somatostatin found in other species.

Microwave Sintering Technology for the Production of Metal Oxide Varistors

1990 ◽  
Vol 189 ◽  
Author(s):  
G. McMahon ◽  
A. Pant ◽  
R. Sood ◽  
A. Ahmas ◽  
R.T. Holt
Keyword(s):  
Grain Size ◽  
Electrical Properties ◽  
Metal Oxide ◽  
Leakage Current ◽  
Microwave Sintering ◽  
Identical Composition

ABSTRACTA microwave sintering technology has been developed for the production of metal oxide varistors. The electrical properties (leakage current and non-linearity coefficient) of the microwave sintered devices were found to be comparable to those obtained for conventionally sintered varistors of identical composition. Additionally, the reference voltages were greater (by a factor of two) and the biaxial moduli of rupture were higher for the microwave sintered specimens. These differences have been attributed to the smaller grain size associated with the microwave sintered specimens.

IDENTIFICATION OF RIVER WATER EXCESSIVE POLLUTION SOURCES

2006 ◽  
Vol 05 (02) ◽  
pp. 397-417 ◽  
Author(s):  
K. J. KACHIASHVILI ◽  
D. I. MELIKDZHANIAN
Keyword(s):  
Mathematical Models ◽  
River Water ◽  
Cross Sections ◽  
Pollutant Transport ◽  
Pollution Sources ◽  
Program Package ◽  
Statistical Hypotheses ◽  
Identical Composition

The program package for identification of river water excessive pollution sources located between two controlled cross-sections of the river is described in this paper. The software has been developed by the authors on the basis of mathematical models of pollutant transport in the rivers and statistical hypotheses checking methods. The identification algorithms were elaborated with the supposition that the pollution sources discharge different compositions of pollutants or (at the identical composition) different proportions of pollutants into the rivers.

2D-DIGE As a Tool to Analyze Lot-to-Lot Consistency of Complex Therapeutic Products Such As BAX 855, a PEGylated Recombinant FVIII

Blood ◽  
2011 ◽  
Vol 118 (21) ◽  
pp. 4360-4360
Author(s):  
Hanspeter Rottensteiner ◽  
Christina Monetti ◽  
Herbert Gritsch ◽  
Alfred Weber ◽  
Hartmut J. Ehrlich ◽  
...  
Keyword(s):  
Gel Electrophoresis ◽  
Hemophilia A ◽  
2D Dige ◽  
Straightforward Method ◽  
Difference Gel Electrophoresis ◽  
Identical Composition ◽  
Dimension 2 ◽  
Recombinant Fviii ◽  
And Control

Abstract Abstract 4360 2-Dimensional difference gel electrophoresis (2-D DIGE) is a method that circumvents the gel-to-gel variability inherent in conventional 2-dimensional gel electrophoresis (2-DE). We developed a 2-D DIGE protocol for recombinant factor VIII (rFVIII), a therapeutic protein used for the treatment of hemophilia A. The FVIII heterodimer is composed of heterogenous, strongly glycosylated heavy and light chains that are held together by a divalent cation. 2-DE of rFVIII led to a separation of the various fragments and their identity could be determined by Western blot. A comparison of two rFVIII batches by 2-D DIGE revealed their identical composition, whereas an rFVIII variant lacking its central B domain was congruent with the smallest heavy and light chain fragments of rFVIII only. A simpler pattern was obtained upon removal of the terminal sialic acids of rFVIII’s glycans due to a better focusing in the first dimension. 2-D DIGE was also well suited to structurally evaluate BAX 855, a PEGylated longer-acting variant of recombinant FVIII. 2-D DIGE thus proved an excellent and straightforward method for structural analysis of rFVIII. Our data suggest that the method could serve as a tool to characterize and control quality of very complex pharmaceutically active ingredients such as PEGylated proteins. Disclosures: Rottensteiner: Baxter Innovations GmbH: Employment. Monetti:Baxter Innovations GmbH: Employment. Gritsch:Baxter Innovations GmbH: Employment. Weber:Baxter Innovations GmbH: Employment. Ehrlich:Baxter Innovations GmbH: Employment. Scheiflinger:Baxter Innovations GmbH: Employment. Turecek:Baxter Innovations GmbH: Employment.

Effect of Borohydride Addition Rate on Chemically Prepared Amorphous Fe–B Particles

1990 ◽  
Vol 206 ◽  
Author(s):  
C. Bender Koch ◽  
S. Mørup ◽  
S. Linderoth
Keyword(s):  
Chemical Composition ◽  
Aqueous Solutions ◽  
Hyperfine Field ◽  
Isomer Shift ◽  
Amorphous Alloys ◽  
Chemical Reduction ◽  
Magnetic Hyperfine Field ◽  
Hyperfine Parameters ◽  
Addition Rate ◽  
Identical Composition

ABSTRACTAmorphous Fe-B alloys can be prepared by reacting aqueous solutions of Fe salts and NaBH4. In this work the effect of the addition rate of the NaBH4 solution to the FeSO4 solution on the precipitate is investigated. The chemical composition of the amorphous alloys formed varies between Fe79B21 and Fe68B32. The hyperfine parameters of the alloys, derived from Mössbauer spectra, show a decrease from 29 to 25 T of the magnetic hyperfine field and an increase from 0.19 to 0.28 mms−1 of the isomer shift with increasing NaBH4 addition rate. The results suggest that alloys with different structures but identical composition may be produced by chemical reduction.

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