Preliminary Study in Cross-Linked Gelatin/Alginate Sponges

2012 ◽  
Vol 184-185 ◽  
pp. 1102-1105
Author(s):  
Ching Wen Lou ◽  
Ming Sheng Huang ◽  
Chiung Yun Chang ◽  
Chao Tsang Lu ◽  
Wen Cheng Chen ◽  
...  
Keyword(s):  
Weight Loss ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Freeze Drying ◽  
Tissue Fluid ◽  
Fluid Absorption ◽  
Degradation Tests ◽  
Swelling Rate ◽  
Preliminary Study ◽  
Scanning Electron

Gelatin and alginate are commonly used as biomaterials for making dressings because both of which have hemostasis and high tissue fluid absorption ability. In this study, gelatin and alginate are mixed at various weight ratios, the mixtures of which then undergo the freeze-drying, forming the gelatin/alginate sponges. The resulting sponges serve as the contact surface of dressings, and swelling and degradation tests evaluate the samples in terms of hydrophilicity and absorbility. The pores in the sponges are then observed by a scanning electron microscope (SEM). According to our study, with a decrease in the amount of gelatin, the determined pore size and swelling rate both increase, but the weight loss decreases.

Microencapsulation Exploration of Squalene by Ultrasonic Spraying and Freeze-Drying

2012 ◽  
Vol 554-556 ◽  
pp. 1835-1840 ◽  
Author(s):  
Lu Lu Han ◽  
Liang Wu Bi ◽  
Zhen Dong Zhao ◽  
Ya Li Xing
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Freeze Drying ◽  
Suitable Condition ◽  
Sucrose Ester ◽  
Arabic Gum ◽  
Reasonable Condition ◽  
Running Time ◽  
Ultrasonic Emulsification ◽  
Scanning Electron

Squalene, a natural antioxidant, was microencapsulated by the method of ultrasonic spraying and freeze-drying using shell materials of gelatin and arabic gum. The suitable condition for ultrasonic emulsification before ultrasonic spraying and freeze-drying was frequency 28 kHz and running time 20 min. The reasonable condition for microencapsulation of squalene by ultrasonic spraying and freeze-drying was gelatin 3.0 %, arabic gum 5.0 %, maltodextrin 6.0 % and sucrose ester 0.9 %. The appearance and size of microcapsules of squalene were measured by scanning electron microscope and metallographic microscope. The microcapsules of squalene were smonth spheres at the diameter of about 10 μm.

scholarly journals A Scanning Electron Microscope Examination of Subglacial Quartz Grains from Camp Century Core, Greenland–A Preliminary Study

1980 ◽  
Vol 25 (91) ◽  
pp. 125-132 ◽  
Author(s):  
W. B. Whalley ◽  
C. C. Langway
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ice Sheet ◽  
Greenland Ice Sheet ◽  
Microscope Examination ◽  
Aeolian Transport ◽  
Preliminary Study ◽  
Two Populations ◽  
Quartz Grains ◽  
Scanning Electron

AbstractSurface textures and angularity–roundness characteristics of quartz sand grains of till from the base of the Greenland ice sheet at Camp Century were examined with a scanning electron microscope. Two basic populations are revealed; an angular component, which shows grains with edge abrasion and attrition indicative of subglacial grinding, and a well-rounded component with the characteristics of aeolian transport. It is suggested that these two populations were mixed subglacially, the aeolian fraction having been produced at some stage before the ice sheet encroached over the area of their deposition.

Synthesis and Evaluation of Benzohydrazide Derivative as a Corrosion Protector for Magnesium Alloy in 3%Nacl

2021 ◽  
Author(s):  
RAJA KALIYAPERUMAL ◽  
T.KASILINGAM
Keyword(s):  
Weight Loss ◽  
Electron Microscope ◽  
Magnesium Alloy ◽  
Scanning Electron Microscope ◽  
Alkaline Medium ◽  
Energy Dispersive ◽  
Cathodic Process ◽  
X Ray ◽  
Nyquist Plots ◽  
Scanning Electron

Abstract Inhibition action of 4-Chloro-N(3,4,5-trimethoxybenzilidene) benzohydrazide on the corrosion of magnesium alloy in alkaline medium was investigated by weight-loss technique, Nyquist spectra, Tafel plot, scanning electron microscope and energy dispersive x-ray analysis. Tafel curves of magnesium alloy showed both anodic and cathodic process suppressed. Nyquist plots, scanning electron microscope and energy dispersive x-ray analysis studies provide the confirmatory evidence for the protection of magnesium alloy by the studied inhibitor.

scholarly journals The Decay Resistance and Hyphae Penetration of BambooGigantochloa scortechiniiDecayed by White and Brown Rot Fungi

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Norul Hisham Hamid ◽  
Othman Sulaiman ◽  
Azmy Mohammad ◽  
Norasikin Ahmad Ludin
Keyword(s):  
Weight Loss ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Brown Rot ◽  
Decay Resistance ◽  
Malt Extract ◽  
Brown Rot Fungi ◽  
Percentage Weight ◽  
Agar Media ◽  
Scanning Electron

The decay resistance and hyphae penetration of bambooGigantochloa scortechiniidecayed by white and brown rot fungi were investigated using scanning electron microscope (SEM). The bamboo grown in natural stand from three different age classes of 0.5, 3.5, and 6.5 years was harvested, oven dried, sterilised, and exposed to agar media containing 4% malt extract and 2% agar technical (no. 3) under laboratory condition for 8 weeks. The deterioration was expressed as percentage of weight loss, and the decay resistance classes were measured according to ASTM D 2017-81 (1986). This study found that the percentage weight loss was greatly reduced with the bamboo ageing. Regardless of age, theG. scortechiniiwas classified as highly resistant to decay by white and brown rot fungi. The scanning electron microscope (SEM) observation showed that the fungi hyphae mostly penetrated into the vessel and proceeded to the pit and parenchyma cells.

A technique for preparing Beauveria spp. for scanning electron microscopy

1980 ◽  
Vol 58 (15) ◽  
pp. 1700-1703 ◽  
Author(s):  
E. C. Quattlebaum ◽  
G. R. Carner
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Freeze Drying ◽  
Osmium Tetroxide ◽  
Air Drying ◽  
Preparation Methods ◽  
Critical Point Drying ◽  
Scanning Electron

Vapor fixation for 96 h with 1% osmium tetroxide (OsO4) and 3–4 days air drying produced distortion-free specimens of Beauveria spp. for examination with the scanning electron microscope. A combination of 4 h OsO4 vapor fixation and freeze-drying also reduced disruption satisfactorily but specimens were not as well preserved as with the first method. Preparation methods that were ineffective in preventing collapse of hydrophilic structures were Cling Free® sprayed on specimens prior to examination, freeze-drying, critical-point drying (of unfixed material), and vapor fixation with glutaraldehyde.

scholarly journals A Scanning Electron Microscope Examination of Subglacial Quartz Grains from Camp Century Core, Greenland–A Preliminary Study

1980 ◽  
Vol 25 (91) ◽  
pp. 125-132 ◽  
Author(s):  
W. B. Whalley ◽  
C. C. Langway
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ice Sheet ◽  
Greenland Ice Sheet ◽  
Microscope Examination ◽  
Aeolian Transport ◽  
Preliminary Study ◽  
Two Populations ◽  
Quartz Grains ◽  
Scanning Electron

AbstractSurface textures and angularity–roundness characteristics of quartz sand grains of till from the base of the Greenland ice sheet at Camp Century were examined with a scanning electron microscope. Two basic populations are revealed; an angular component, which shows grains with edge abrasion and attrition indicative of subglacial grinding, and a well-rounded component with the characteristics of aeolian transport. It is suggested that these two populations were mixed subglacially, the aeolian fraction having been produced at some stage before the ice sheet encroached over the area of their deposition.

scholarly journals New 3,3'-((4-Aryl) methylene)bis(4-hydroxy-2H chromen 2- one) (MHO) derivatives as Corrosion Inhibitor

2020 ◽  
Vol 10 (4) ◽  
pp. 137-146
Author(s):  
Yasameen K. Al-Majedy ◽  
Hiba H. Ibraheem ◽  
Ali Jasem ◽  
Ahmed A. Al-Amiery
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Weight Loss ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Corrosion Inhibitor ◽  
Weight Loss Method ◽  
Loss Method ◽  
Scanning Electron ◽  
Surface Technique

New green natural particles as corrosion inhibitor namely, macromolecules were incorporated beginning from 4-hydroxycoumarin with 4-nitrobenzaldehyde in the presence of glacial acid (1) then synthesis with methyl bromoacetate after that this compound (2) used to synthesis of 2,2'-(3,3'-((4-nitrophenyl)methylene)bis(2-oxo-2H-chromene-4,3 diyl))bis(oxy)diacetohydrazide (3) when was refluxed with hydrazine hydrate when compound(2) refluxed with HCl to obtain compound (4)  and tested all the synthesis compounds on mild steel (MS) in 1 M HCl, 1M H2SO4 media by a weight loss method and identification of the surface technique employee scanning/electron/microscope (SEM) studies. The weight loss investigation demonstrated that inhibition performances have been improved via concentration raising of inhibitor. To support our results scanning electron microscopy was employed to clarify the surface of the MS with and without synthesis compounds in 1.0 M HCl and1.0M H2SO4 media.

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