scholarly journals WATER RESISTANCE OF CERAMZITE CONTAINING GALVANOTECIINICAL SLIME/KERAMZITO, TURINČIO GALVANOTECHNINIO ŠLAMO, ATSPARUMAS VANDENIUI

1997 ◽  
Vol 3 (11) ◽  
pp. 44-51
Author(s):  
Algimantas Kazragis ◽  
Elena Zalieckienė ◽  
Halina Kulinič ◽  
Violeta Milčiūnienė
Keyword(s):  
Manufacturing Process ◽  
Water Resistance ◽  
Solubility Product ◽  
Distilled Water ◽  
Metal Working ◽  
Metallic Compounds

In the Lithuanian metal working plants galvanotechnical slime is formed during the manufacturing process. It consists of Fe, Ca, Mg and combinations of microelements Cr, Mn, Co, Ni, Cu, Zn, Cd, Pb such as hydroxide, sulphide etc. To prevent contamination of the environment by metal combinations contained in the galvanotechnical slime it has to be utilized for ceramic products during the manufacturing process. In Lithuania the galvanotechnical slime is utilized for ceramzite produced in the Palemonas factory. The aim of this work is to find out whether the microelements contained in galvanotechnical slime are emitted from ceramzite into the environment while ceramzite is affected by water. There is hydromical clay in Lithuania. Cremate clay contains 70—95% of hydromicas, 5—30% kaolinite, and up to 5% of chlorite and traces of montmorillonite. It contains quartz, feldspars, calcite and limonite as well. Oxidical structure (%) is: SiO2 48–51, Al2O3 + TiO2 14—19, Fe2O3 5—8, CaO 7–11, MgO ∼ 3, K2O ∼ 3, Na2O ∼ 1, SO3 up to 0.4, loss by roasting 10—13. In producing ceramzite (1050—125°C) mullite, quartz, hematite, magnetite, anorthite, spinel, forsterite etc. are formed from clay components. If ceramzite contains galvanotechnical slime, the microelements along with ceramzite components compounds thermodynamically a few of Ca, Mg, Fe, Ni, Cu, Zn silicates and aluminates and Ca, Mg, Ni, Cu ferrites. The amount of microelements transferring from ceramzite into water has been defined with the atomicabsorption spectroscopy by keeping ceramzite granules in distilled water for 3,6 and 12 months. The results of the investigation demonstrate that the compounds of Cr, Ni, Cd, Pb, Mn, and Co do not transfer from ceramzite into water. The amounts of metallic compounds in the water C H 2 O are limited by the values of their solubility product L: C H 2 O = 5,62 Cmax L0,087, The amount of metallic compounds in the water C H 2 O depends on the extraction length according to the satiation curve. The results of the investigation show that ceramzite containing galvanotechnical slime is an ecologically clean heat insulating substance.

Water Uptake Behavior of Lignin Modified Starch Film

2014 ◽  
Vol 699 ◽  
pp. 204-209 ◽  
Author(s):  
Ariyanti Sarwono ◽  
Zakaria Man ◽  
Mohd Azmi Bustam ◽  
Khairun Azizi Azizli
Keyword(s):  
Diffusion Coefficient ◽  
Water Uptake ◽  
Water Resistance ◽  
Second Law ◽  
Modified Starch ◽  
Distilled Water ◽  
Slab Model ◽  
Thin Slab ◽  
Different Temperatures ◽  
Calculated Diffusion Coefficient

A biodegradable urea crosslinked starch film was prepared. To improve the water resistance, the urea crosslinked starch system was reinforced with 5%, 10%, and 15% lignin. The prepared films were immersed in distilled water at three different temperatures, 25°C, 35°C and 45°C to study the behavior of water uptake. The addition of lignin effectively decreases water uptake as proven by lower water uptake equilibrium. Diffusion coefficient was calculated from the kinetic water uptake profile using the slope method of Fick’s second law for thin slab model. The calculated diffusion coefficient decreases as the lignin is increased. The diffusion coefficient is found to be dependent on the temperature. As more lignin is added to the system, higher activation energy is obtained due to the hydrophobicity of lignin.

scholarly journals PREPARATION OF WATER RESISTANT GLUE FROM MILK PLASTIC

2021 ◽  
Vol 21 (no 1) ◽  
Author(s):  
R. Kamalambigeswari ◽  
S. Sharmila ◽  
E. Kowsalya ◽  
Shankar Singh ◽  
Arun Naik ◽  
...  
Keyword(s):  
Water Resistance ◽  
Cow Milk ◽  
Distilled Water ◽  
Milk Product ◽  
Soya Milk ◽  
Waste Milk ◽  
Pure Milk

In this process of extracting Milk Plastic Water Resistant Glue from the casein 3 type of milk soya milk, fresh cow milk and the pastured milk were used. Casein was extracted and vinegar was added while milk was getting heated. Casein was separated, and dried for 2-3 days. Milk Plastic that was obtained was heated with distilled water. A pinch of papain is added and made it hot for 4 hours and then 1N of NaOH is added and heated for few minutes. The collected sample is centrifuged at 12000 rpm and the glue was obtained. The glue is stored at -200C. 2 card board pieces was stacked together by using this glue and dipped in water to check the water resistance. It was stable for about 10 minutes and then it was loosened. It is little expensive comparing to other glues when it was did with pure milk while if it is done with waste milk product its cost will be low.

RESEARCH OF FUEL- AND WATER RESISTANCE OF COATINGS BASED ON THE FILLED EPOXY-THIOKOL POLYMERIC COMPOSITIONS

2021 ◽  
pp. 93-102
Author(s):  
V.А. Kuznetsova ◽  
◽  
V.G. Zheleznyak ◽  
E.V. Kurshev ◽  
V.V. Yemelyanov ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Lamellar Structure ◽  
Water Resistance ◽  
Moisture Absorption ◽  
Distilled Water ◽  
Barrier Effect ◽  
Organic Silicon ◽  
Polymeric Compositions ◽  
Scanning Electron

The article provides the results of studies of fuel- and water resistant priming coatings based on the filled fuel-resistant compositions based on the E-41 epoxy modified with liquid Thiokol 1 brand and cured with ASOT-2 organic-silicon amine. There was examined the microstructure of coating surface of fuel resistant primer 1 by means of optical and scanning electron microscopy after tests in TS-1 fuel and distilled water. It has been determined that availability of a filler with lamellar structure as a part of fuel-resistant primer promotes the decrease in fuel-swelling and moisture absorption that can be connected with manifestation of a barrier effect.

Biophysical Measurement of Molecular Weight of Foot-and-Mouth Disease RNA Fragments

1974 ◽  
Vol 32 ◽  
pp. 262-263
Author(s):  
Sydney S. Breese ◽  
Howard L. Bachrach
Keyword(s):  
Chemical Properties ◽  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
Distilled Water ◽  
Bovine Plasma ◽  
Mouth Disease Virus ◽  
Foot And Mouth ◽  
Carbon Coated ◽  
Rna Fragments ◽  
Physical And Chemical

Continuing studies on the physical and chemical properties of foot-and-mouth disease virus (FMDV) have included electron microscopy of RNA strands released when highly purified virus (1) was dialyzed against demlneralized distilled water. The RNA strands were dried on formvar-carbon coated electron microscope screens pretreated with 0.1% bovine plasma albumin in distilled water. At this low salt concentration the RNA strands were extended and were stained with 1% phosphotungstic acid. Random dispersions of strands were recorded on electron micrographs, enlarged to 30,000 or 40,000 X and the lengths measured with a map-measuring wheel. Figure 1 is a typical micrograph and Fig. 2 shows the distributions of strand lengths for the three major types of FMDV (A119 of 6/9/72; C3-Rezende of 1/5/73; and O1-Brugge of 8/24/73.

Freeze-fracture, freeze-etch complementary pairs of virus-infected cells reveal value of etching even when relatively high concentrations of cryoprotectants are used

1978 ◽  
Vol 36 (2) ◽  
pp. 136-137
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe
Keyword(s):  
Plant Tissue ◽  
Phosphate Buffer ◽  
Infected Plant ◽  
Freeze Fracture ◽  
Distilled Water ◽  
Virus Infected Plant ◽  
Infected Cells ◽  
High Concentrations

It has been assumed by many involved in freeze-etch or freeze-fracture studies that it would be useless to etch specimens which were cryoprotected by more than 15% glycerol. We presumed that the amount of cryoprotective material exposed at the surface would serve as a contaminating layer and prevent the visualization of fine details. Recent unexpected freeze-etch results indicated that it would be useful to compare complementary replicas in which one-half of the frozen-fractured specimen would be shadowed and replicated immediately after fracturing whereas the complement would be etched at -98°C for 1 to 10 minutes before being shadowed and replicated.Standard complementary replica holders (Steere, 1973) with hinges removed were used for this study. Specimens consisting of unfixed virus-infected plant tissue infiltrated with 0.05 M phosphate buffer or distilled water were used without cryoprotectant. Some were permitted to settle through gradients to the desired concentrations of different cryoprotectants.

Comparison of Acrylamide and Agar Gels by Freeze-Etching

1977 ◽  
Vol 35 ◽  
pp. 606-607
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe
Keyword(s):  
Electron Microscope ◽  
Sodium Hydroxide ◽  
Sodium Hypochlorite ◽  
Chromic Acid ◽  
Distilled Water ◽  
Thin Sheets ◽  
Acid Cleaning ◽  
Agar Gels ◽  
Freeze Etching ◽  
Water Cut

Thin sheets of acrylamide and agar gels of different concentrations were prepared and washed in distilled water, cut into pieces of appropriate size to fit into complementary freeze-etch specimen holders (1) and rapidly frozen. Freeze-etching was accomplished in a modified Denton DFE-2 freeze-etch unit on a DV-503 vacuum evaporator.* All samples were etched for 10 min. at -98°C then re-cooled to -150°C for deposition of Pt-C shadow- and C replica-films. Acrylamide gels were dissolved in Chlorox (5.251 sodium hypochlorite) containing 101 sodium hydroxide, whereas agar gels dissolved rapidly in the commonly used chromic acid cleaning solutions. Replicas were picked up on grids with thin Foimvar support films and stereo electron micrographs were obtained with a JEM-100 B electron microscope equipped with a 60° goniometer stage.Characteristic differences between gels of different concentrations (Figs. 1 and 2) were sufficiently pronounced to convince us that the structures observed are real and not the result of freezing artifacts.

Heterogeneity of Size and Distribution of Intramembrane Particles in the Plasma Membrane of Yeast

1977 ◽  
Vol 35 ◽  
pp. 596-597
Author(s):  
E. Keyhani
Keyword(s):  
Plasma Membrane ◽  
Candida Utilis ◽  
Synthetic Medium ◽  
Freeze Fracture ◽  
Translational Diffusion ◽  
Yeast Cells ◽  
Distilled Water ◽  
Intramembrane Particles ◽  
The Matrix ◽  
Water Cell

The matrix of biological membranes consists of a lipid bilayer into which proteins or protein aggregates are intercalated. Freeze-fracture techni- ques permit these proteins, perhaps in association with lipids, to be visualized in the hydrophobic regions of the membrane. Thus, numerous intramembrane particles (IMP) have been found on the fracture faces of membranes from a wide variety of cells (1-3). A recognized property of IMP is their tendency to form aggregates in response to changes in experi- mental conditions (4,5), perhaps as a result of translational diffusion through the viscous plane of the membrane. The purpose of this communica- tion is to describe the distribution and size of IMP in the plasma membrane of yeast (Candida utilis).Yeast cells (ATCC 8205) were grown in synthetic medium (6), and then harvested after 16 hours of culture, and washed twice in distilled water. Cell pellets were suspended in growth medium supplemented with 30% glycerol and incubated for 30 minutes at 0°C, centrifuged, and prepared for freeze-fracture, as described earlier (2,3).

Variations in Surface Textures of Quartz Sand using Electron Microscopy

1970 ◽  
Vol 28 ◽  
pp. 494-495
Author(s):  
Eugene J. Amaral
Keyword(s):  
Electron Microscopy ◽  
Glass Industry ◽  
Glass Slide ◽  
Distilled Water ◽  
Early Paleozoic ◽  
Secondary Effects ◽  
Surface Textures ◽  
High Silica ◽  
Sand Deposit ◽  
The U.S

Examination of sand grain surfaces from early Paleozoic sandstones by electron microscopy reveals a variety of secondary effects caused by rock-forming processes after final deposition of the sand. Detailed studies were conducted on both coarse (≥0.71mm) and fine (=0.25mm) fractions of St. Peter Sandstone, a widespread sand deposit underlying much of the U.S. Central Interior and used in the glass industry because of its remarkably high silica purity.The very friable sandstone was disaggregated and sieved to obtain the two size fractions, and then cleaned by boiling in HCl to remove any iron impurities and rinsed in distilled water. The sand grains were then partially embedded by sprinkling them onto a glass slide coated with a thin tacky layer of latex. Direct platinum shadowed carbon replicas were made of the exposed sand grain surfaces, and were separated by dissolution of the silica in HF acid.

Scanning Electron Microscopy-cuticular Lesions on the Roundworm Ascaris Suum

1970 ◽  
Vol 28 ◽  
pp. 114-115
Author(s):  
P. A. Madden ◽  
W. R. Anderson
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Freeze Drying ◽  
Room Temperature ◽  
Secondary Electron ◽  
Distilled Water ◽  
Freeze Dried ◽  
Silver Paint ◽  
To Come ◽  
Scanning Electron

The intestinal roundworm of swine is pinkish in color and about the diameter of a lead pencil. Adult worms, taken from parasitized swine, frequently were observed with macroscopic lesions on their cuticule. Those possessing such lesions were rinsed in distilled water, and cylindrical segments of the affected areas were removed. Some of the segments were fixed in buffered formalin before freeze-drying; others were freeze-dried immediately. Initially, specimens were quenched in liquid freon followed by immersion in liquid nitrogen. They were then placed in ampuoles in a freezer at −45C and sublimated by vacuum until dry. After the specimens appeared dry, the freezer was allowed to come to room temperature slowly while the vacuum was maintained. The dried specimens were attached to metal pegs with conductive silver paint and placed in a vacuum evaporator on a rotating tilting stage. They were then coated by evaporating an alloy of 20% palladium and 80% gold to a thickness of approximately 300 A°. The specimens were examined by secondary electron emmission in a scanning electron microscope.

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