Structural characteristics and immunostimulatory activity of a new polysaccharide from Dendrobium fimbriatum Hook

Immunostimulatory Activity ◽

Property Analysis ◽

Dendrobium Fimbriatum

A new polysaccharide (cDFP-W1) with high immunostimulatory activity was isolated from the stems of Dendrobium fimbriatum Hook. Physicochemical property analysis displayed that cDFP-W1 consisted of mannose and glucose in the...

Moisture removal mechanism of low-rank coal by hydrothermal dewatering: Physicochemical property analysis and DFT calculation

Fuel ◽

10.1016/j.fuel.2016.09.071 ◽

2017 ◽

Vol 187 ◽

pp. 242-249 ◽

Cited By ~ 36

Author(s):

Junhong Wu ◽

Jie Wang ◽

Jianzhong Liu ◽

Yumeng Yang ◽

Jun Cheng ◽

...

Keyword(s):

Dft Calculation ◽

Low Rank ◽

Moisture Removal ◽

Removal Mechanism ◽

Low Rank Coal ◽

Property Analysis

Physicochemical Property Analysis

10.32388/4e3g5m ◽

2020 ◽

Author(s):

Keyword(s):

Property Analysis

High Throughput Metabolic and Physicochemical Property Analysis: Strategies and Tactics for Impact on Drug Discovery Success

Integrated Strategies for Drug Discovery Using Mass Spectrometry ◽

10.1002/0471721034.ch15 ◽

2005 ◽

pp. 433-458

Author(s):

Edward H. Kerns ◽

Li Di

Keyword(s):

Drug Discovery ◽

High Throughput ◽

Property Analysis ◽

Analysis Strategies

Natural Polysaccharides with Immunomodulatory Activities

Mini-Reviews in Medicinal Chemistry ◽

10.2174/1389557519666190913151632 ◽

2020 ◽

Vol 20 (2) ◽

pp. 96-106

Author(s):

Yue Zhao ◽

Bocheng Yan ◽

Zhaoyu Wang ◽

Mingjing Li ◽

Wei Zhao

Keyword(s):

Biological Activities ◽

Structural Features ◽

Therapeutic Action ◽

Immunostimulatory Activity ◽

Natural Polysaccharide ◽

Different Origins

Natural polysaccharide is a kind of natural macromolecular which can be extracted from plants, fungi, algae, animals, and bacteria. The monosaccharide compositions and glucosidic bonds of polysaccharides from different origins vary substantially. Natural polysaccharides have been shown to possess complex, important and multifaceted biological activities including antitumor, anticoagulant, antioxidative, antiviral, immunomodulatory, antihyperlipidemic and antihepatotoxic activities. Their properties are mainly due to their structural characteristics. It is necessary to develop polysaccharide immunomodulators with potential for preventive or therapeutic action. The present paper summarizes the structural features, immunostimulatory activity and the immunomodulatory mechanisms of natural polysaccharides. In particular, it also provides an overview of representative natural polysaccharide immunomodulators.

A High Resolution Study of G.P. Zones in Aluminum - 4.2 at % Silver

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055904 ◽

1982 ◽

Vol 40 ◽

pp. 722-723 ◽

Cited By ~ 1

Author(s):

R. Gronsky

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

High Resolution ◽

Computer Simulations ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Resolution Study

The phenomenon of clustering in Al-Ag alloys has been extensively studied since the early work of Guinierl, wherein the pre-precipitation state was characterized as an assembly of spherical, ordered, silver-rich G.P. zones. Subsequent x-ray and TEM investigations yielded results in general agreement with this model. However, serious discrepancies were later revealed by the detailed x-ray diffraction - based computer simulations of Gragg and Cohen, i.e., the silver-rich clusters were instead octahedral in shape and fully disordered, atleast below 170°C. The object of the present investigation is to examine directly the structural characteristics of G.P. zones in Al-Ag by high resolution transmission electron microscopy.

SEM analysis of the change in the reaction rates with deposit structures in the copper-iron cementation system

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100109422 ◽

1978 ◽

Vol 36 (1) ◽

pp. 456-457

Author(s):

V. Annamalai ◽

L.E. Murr

Keyword(s):

Secondary Electron Emission ◽

Copper Deposit ◽

Reaction Rates ◽

Sem Analysis ◽

Experimental Conditions ◽

Major Drawback ◽

Emission Mode ◽

Scrap Iron ◽

Image Position

Economical recovery of copper metal from leach liquors has been carried out by the simple process of cementing copper onto a suitable substrate metal, such as scrap-iron, since the 16th century. The process has, however, a major drawback of consuming more iron than stoichiometrically needed by the reaction.Therefore, many research groups started looking into the process more closely. Though it is accepted that the structural characteristics of the resultant copper deposit cause changes in reaction rates for various experimental conditions, not many systems have been systematically investigated. This paper examines the deposit structures and the kinetic data, and explains the correlations between them.A simple cementation cell along with rotating discs of pure iron (99.9%) were employed in this study to obtain the kinetic results The resultant copper deposits were studied in a Hitachi Perkin-Elmer HHS-2R scanning electron microscope operated at 25kV in the secondary electron emission mode.

Use of 2½ D imaging in analysis of NiTi martensite

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100110192 ◽

1978 ◽

Vol 36 (1) ◽

pp. 610-611

Author(s):

G. M. Michal

Keyword(s):

Memory Effect ◽

Monoclinic Phase ◽

Reaction Path ◽

Salient Feature ◽

Martensite Phase ◽

Orientation Relationships ◽

Low Symmetry ◽

Hydride Phases ◽

Unusual Shape

Several TEM investigations have attempted to correlate the structural characteristics to the unusual shape memory effect in NiTi, the consensus being the essence of the memory effect is ostensible manifest in the structure of NiTi transforming martensitic- ally from a B2 ordered lattice to a low temperature monoclinic phase. Commensurate with the low symmetry of the martensite phase, many variants may form from the B2 lattice explaining the very complex transformed microstructure. The microstructure may also be complicated by the enhanced formation of oxide or hydride phases and precipitation of intermetallic compounds by electron beam exposure. Variants are typically found in selfaccommodation groups with members of a group internally twinned and the twins themselves are often observed to be internally twinned. Often the most salient feature of a group of variants is their close clustering around a given orientation. Analysis of such orientation relationships may be a key to determining the nature of the reaction path that gives the transformation its apparently perfect reversibility.

Use of light microscopy in the qualitative and quantitative study of liquid crystalline order

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100121727 ◽

1992 ◽

Vol 50 (1) ◽

pp. 264-265

Author(s):

Christopher Viney

Keyword(s):

Light Microscopy ◽

Liquid Crystalline ◽

Molecular Order ◽

Liquid Crystalline Phases ◽

Convenient Technique ◽

Liquid Crystalline Materials ◽

Transparent Windows

Light microscopy is a convenient technique for characterizing molecular order in fluid liquid crystalline materials. Microstructures can usually be observed under the actual conditions that promote the formation of liquid crystalline phases, whether or not a solvent is required, and at temperatures that can range from the boiling point of nitrogen to 600°C. It is relatively easy to produce specimens that are sufficiently thin and flat, simply by confining a droplet between glass cover slides. Specimens do not need to be conducting, and they do not have to be maintained in a vacuum. Drybox or other controlled environmental conditions can be maintained in a sealed chamber equipped with transparent windows; some heating/ freezing stages can be used for this purpose. It is relatively easy to construct a modified stage so that the generation and relaxation of global molecular order can be observed while specimens are being sheared, simulating flow conditions that exist during processing. Also, light only rarely affects the chemical composition or molecular weight distribution of the sample. Because little or no processing is required after collecting the sample, one can be confident that biologically derived materials will reveal many of their in vivo structural characteristics, even though microscopy is performed in vitro.