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.

Efficacy of Pinosylvins against White-Rot and Brown-Rot Fungi

Holzforschung ◽  
1999 ◽  
Vol 53 (5) ◽  
pp. 491-497 ◽  
Author(s):  
Catherine C. Celimene ◽  
Jessie A. Micales ◽  
Leslie Ferge ◽  
Raymond A. Young
Keyword(s):  
Picea Glauca ◽  
Pinus Banksiana ◽  
White Rot Fungi ◽  
Brown Rot ◽  
Monomethyl Ether ◽  
Decay Resistance ◽  
White Rot ◽  
Red Maple ◽  
Brown Rot Fungi ◽  
Agar Media

Summary Three stilbenes, pinosylvin (PS), pinosylvin monomethyl ether (PSM) and pinosylvin dimethyl ether (PSD), were extracted from white spruce (Picea glauca), jack pine (Pinus banksiana), and red pine (Pinus resinosa) pine cones, and their structures were confirmed by spectroscopic and chromatographic (HPLC, GC/MS, NMR and FTIR) analysis. PS, PSM, PSD or a 1:1:1 mixture of these stilbenes at concentrations of 0.1 % and 1.0 % were examined for their fungal inhibitory activity by two bioassay methods. Growth of white-rot fungi (Trametes versicolor and Phanerochaete chrysosporium), and brown-rot fungi (Neolentinus lepideus, Gloeophyllum trabeum and Postia placenta) on agar media in the presence of each of the stilbenes or a 1:1:1 mixture inhibited growth of white-rot fungi, but slightly stimulated growth of brown-rot fungi. Soil-block assays, conditions more representative of those found in nature, did not correlate with those from the screening on agar media. PS, PSM, PSD or a 1:1:1 mixture of the three compounds at concentrations of 0.1 % and 1.0 % did not impart any significant decay resistance to white-rot fungi inoculated on a hardwood (Red maple). However under the same conditions, decay resistance was observed against brown-rot fungi on a softwood (Southern yellow pine). It appears that stilbenes at least partially contribute to wood decay resistance against brown-rot fungi.

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.

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.

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.

scholarly journals Morphological Structure of Polystyrene Degradated by Soil Bacteria from Sarimukti Final Landfill Cipatat Bandung

2019 ◽  
Vol 1 (3) ◽  
pp. 146-154 ◽  
Author(s):  
Tri Rahayu Hidayat ◽  
Ida Indrawati ◽  
Tati Herlina
Keyword(s):  
Weight Loss ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Soil Bacteria ◽  
Morphological Structure ◽  
Dry Weight ◽  
Physical Analysis ◽  
Degrading Bacteria ◽  
Environmentally Friendly Method ◽  
Scanning Electron

The amount of Styrofoam waste in Bandung reaches 27,02 tons per month. Styrofoam used as packaging food or drinks, that are formed on styrene and benzene. The migration of benzene from packaging materials to food can cause various diseases. The most potent source of finding indigenous bacteria that can degrade of synthetic polymers is in the Final Landfill. This research method uses exploratory methods that are analyzed descriptively consisting of the stages of the biodegradation test with the Winogradsky Column method, calculation of the percentage of weight loss of Styrofoam, physical analysis with Scanning Electron Microscope (SEM). The results of this study found 4 species of polystyrene degrading bacteria is Pseudomonas aeruginosa, Bacillus amyloliquefaciens, Bacillus cereus and Bacillus firmus. The percentage reduction in dry weight of polystyrene showed in the first week the polystyrene weight decreased by 8.27% and increased weight loss up to the eighth week which reached 18.23% and and physical analysis with Scanning Electron Microscope (SEM) indicates that the process of degradation by soil bacteria showed the formation of holes or pores on the surface. These polystyrene degrading bacteria from Sarimukti landfills can be recommended as an environmentally friendly method for reducing styrofoam waste.

scholarly journals Anti-Corrosive Behavior of the Seed Extract of Amomum sabulatum

2021 ◽  
Vol 309 ◽  
pp. 01026
Author(s):  
Neha Daksh ◽  
Akhil Saxena ◽  
Jayahari Lade ◽  
Nakul Gupta
Keyword(s):  
Weight Loss ◽  
Electron Microscope ◽  
Corrosion Rate ◽  
Scanning Electron Microscope ◽  
Mild Steel ◽  
Plant Extract ◽  
Inhibition Efficiency ◽  
Protective Layer ◽  
Seed Extract ◽  
Scanning Electron

An aqueous extract of Amomum sabulatum seeds was evaluated for anticorrosive effects on mild steel in the presence of HCl. Weight loss measurements were taken to determine the corrosion rate and inhibition efficiency at various concentrations. With the increasing concentrations of plant extract, the results showed an improvement in inhibition efficiency and a decrease in corrosion rate. In the presence of 1500 ppm concentration of plant extract, it has an inhibition efficiency of 82.08 % at 303 K. The scanning electron microscope was used to examine the surface, which proves that while the extract was there, a protective layer formed on the metal surface.

The Alteration of the Pore Spaces in Sandstones

1973 ◽  
Vol 31 ◽  
pp. 210-211
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Other ◽  
Coarse Grained ◽  
Depositional Fabric ◽  
Soluble Components ◽  
Scanning Electron ◽  
Shape And Size

The pore spaces in sandstones are the result of the original depositional fabric and the degree of post-depositional alteration that the rock has experienced. The largest pore volumes are present in coarse-grained, well-sorted materials with high sphericity. The chief mechanisms which alter the shape and size of the pores are precipitation of cementing agents and the dissolution of soluble components. Each process may operate alone or in combination with the other, or there may be several generations of cementation and solution.The scanning electron microscope has ‘been used in this study to reveal the morphology of the pore spaces in a variety of moderate porosity, orthoquartzites.

The Broad Applications of the Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 20-21
Author(s):  
C. T. Nightingale ◽  
S. E. Summers ◽  
T. P. Turnbull
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscopy ◽  
Surface Topography ◽  
Great Depth ◽  
Resolving Power ◽  
Depth Of Field ◽  
Pictorial Representations ◽  
Scanning Electron

The ease of operation of the scanning electron microscope has insured its wide application in medicine and industry. The micrographs are pictorial representations of surface topography obtained directly from the specimen. The need to replicate is eliminated. The great depth of field and the high resolving power provide far more information than light microscopy.

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