ASSESSMENT OF SAFETY OF APPLICATION OF POLYMER MATERIAL «PENOPLEX» IN LIVESTOCK

2021 ◽  
Vol 1 (3) ◽  
pp. 323-328
Author(s):  
V.G. Tyurin ◽  
◽  
N.N. Potemkina ◽  
A.Yu. Sakharov ◽  
V.G. Semenov ◽  
...  
Keyword(s):  
Sodium Hydroxide ◽  
Polymer Material ◽  
Sodium Hydroxide Solution ◽  
Polymer Materials ◽  
Pig Manure ◽  
Reduce Heat Loss ◽  
Livestock Buildings ◽  
Bacteriological Evaluation ◽  
Disk Method ◽  
Model Environment

The article presents data on veterinary and sanitary and hygienic assessment of the polymer material «Penoplex». The above material is made of Styrofoam and used in many areas of production, including to reduce heat loss of livestock facilities. Cattle and pig manure was used as a contact medium with the material under study. The duration of contact with the material (exposure) was 30 days. To study the resistance of the material to disinfectants, we used: 10 % sodium hydroxide solution (80 °C); 5 % solution of soda ash (70 °C); clarified solution of bleach containing 3 % active chlorine; 40 % solution of formaldehyde; 2 % solution of hydrogen peroxide. Studies of samples of the polymer material «Penoplex» for resistance to animal secretions and disinfectants have shown that the polymer material is resistant to them. During the experiment and after its completion, the «Penoplex» material had no visually visible changes on the outer layer. The used disinfectants and the model environment did not violate the structure of the polymer material «Penoplex». A slight change in the color of the «Penoplex» was found on the 20th day of exposure to 10 % solution of sodium hydroxide with temperature of 70 °C. For sanitary and bacteriological evaluation of «Penoplex», the disk method was used. Discs with a diameter of 10 mm were prepared from the material under study; wood discs were used as a control. Studies have found that Penoplex has no effect on sanitary-indicative microorganisms and is neutral in relation to their growth, which indicates the absence of release of substances from it into the environment that can delay or stimulate the growth of test cultures. The veterinary and sanitary and hygienic assessment of the polymer material «Penoplex» is the basis to recommend it for use in the construction of livestock buildings and inclusion as an addition to the current «List of polymer materials and structures permitted for use in the construction and technological equipment of livestock facilities» in the prescribed manner.

Synthesis and Characteristics of Inorganic Polymer Materials Geopolymerized from Ash of Brickyard

2019 ◽  
Vol 961 ◽  
pp. 45-50 ◽  
Author(s):  
Hoc Thang Nguyen
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Sodium Hydroxide ◽  
Sodium Hydroxide Solution ◽  
Raw Material ◽  
Polymer Materials ◽  
Inorganic Polymer ◽  
High Porosity ◽  
Hydroxide Solution ◽  
Geopolymer Paste

Inorganic polymer materials known as geopolymer-based materials are always interesting topics for researchers. Geopolymer is environmentally friendly material which has been potential applications for many different fields such as technical materials, building materials, insolation or refractories, and others. This study used ash of brickyard (AB) as a raw material for geopolymerization process to develop novel materials with high porosity. AB is industrial waste of the brick factories that need to be managed to reduce their negative impact to the environment. AB contains high alumino-silicate resources were mixed with sodium hydroxide solution for 10 minutes to obtain the geopolymer pastes. Sodium hydroxide solution was used as an alkaline activator to form geopolymer paste. The geopolymer paste was filled into 5-cm cube molds according to ASTM C109/C109M 99, and then cured at room temperature for 28 days. These products were then tested for compressive strength, volumetric weight, and water absorption. Results indicated that the material can be considered lightweight with a compressive strength at 28 days that are in the range of 8.1 to 15.4 MPa, volumetric weight around 600kg/m3 and water absorption is under 210.65 kg/m3. The properties of geopolymer products were also determined by analytical techniques that included mineral composition by X Ray Diffraction (XRD) and microstructure by scanning electron microscope (SEM).

scholarly journals Study the effect of sodium hydroxide solution on the thermal conductivity of nanocomposites

2019 ◽  
Vol 16 (39) ◽  
pp. 38-54
Author(s):  
Ayad Qabash Hameed
Keyword(s):  
Thermal Conductivity ◽  
Sodium Hydroxide ◽  
Natural Condition ◽  
Sodium Hydroxide Solution ◽  
Weight Fraction ◽  
Hydroxide Solution ◽  
Before And After ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Disk Method

In this research, hand lay- up technique is used to prepare samples from epoxy resin reinforced with multi- walled carbon nanotubes in different weight fractions (0, 2, 3, 4, 5) wt%. The immersion effect by sodium hydroxide solution (NaOH) at normality (0.3N) for a period of (15 days) on the thermal conductivity of nanocomposites was studied, and compared to natural condition (before immersion). The thermal conductivity of epoxy nanocomposites specimens were carried out using Lee’s disk method. The experimental results showed that thermal conductivity increased with increase weight fraction before and after immersion for all specimens, while the immersion effect leads to decrease thermal conductive values compared to thermal conductivity values in natural condition.

The preparation of sodium 4-Amino-3-nitro-benzenesulfonate and some related compounds

1982 ◽  
Vol 35 (8) ◽  
pp. 1727 ◽  
Author(s):  
J Rosevear ◽  
JFK Wilshire
Keyword(s):  
Sodium Hydroxide ◽  
Nitro Group ◽  
Sodium Salt ◽  
Sulfonic Acid ◽  
Sodium Hydroxide Solution ◽  
Hydroxide Solution ◽  
Dilute Sodium Hydroxide ◽  
Related Compounds

The sodium salt of 4-amino-3-nitrobenzenesulfonic acid (O-nitroaniline-p-sulfonic acid) has been prepared by the action of dilute sodium hydroxide solution on ethyl [(4-chlorosulfonyl-2-nitro)- phenyllcarbamate. Central to this synthesis is the finding that the N-ethoxycarbonyl group, when located ortho to a nitro group (but not to a bromo group), is readily removed by dilute sodium hydroxide solution.

Kinetics and leaching behaviors of aluminum from pharmaceutical blisters in sodium hydroxide solution

2015 ◽  
Vol 22 (12) ◽  
pp. 4545-4550 ◽  
Author(s):  
Chong-qing Wang ◽  
Hui Wang ◽  
Guo-hua Gu ◽  
Jian-gang Fu ◽  
You-nian Liu
Keyword(s):  
Sodium Hydroxide ◽  
Sodium Hydroxide Solution ◽  
Hydroxide Solution

scholarly journals Reconstruction of the Esophagus in a Patient who Attempted Suicide by Swallowing Sodium Hydroxide Solution -Utility of DP Flap -

1997 ◽  
Vol 1997 (Supplement94) ◽  
pp. 217-225
Author(s):  
Tatsuya Fujiyoshi ◽  
Hiroyuki Masuda ◽  
Tokuji Nishinaka ◽  
Tetsuo Futami ◽  
Hiromi Shibuya
Keyword(s):  
Sodium Hydroxide ◽  
Attempted Suicide ◽  
Sodium Hydroxide Solution ◽  
Hydroxide Solution

scholarly journals Puparia Cleaning Techniques for Forensic and Archaeo-Funerary Studies

Insects ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 104
Author(s):  
Jennifer Pradelli ◽  
Fabiola Tuccia ◽  
Giorgia Giordani ◽  
Stefano Vanin
Keyword(s):  
Sodium Hydroxide ◽  
Molecular Identification ◽  
Sodium Hydroxide Solution ◽  
Species Level ◽  
Post Mortem ◽  
Molecular Analyses ◽  
Chemical Treatments ◽  
Wrong Identification ◽  
Physical And Chemical

Diptera puparia may represent both in forensic and archaeo-funerary contexts the majority of the entomological evidence useful to reconstruct the peri and post-mortem events. Puparia identification is quite difficult due to the lack of identification keys and descriptions. In addition, external substances accumulated during the puparia permanence in the environment make the visualization of the few diagnostic characters difficult, resulting in a wrong identification. Six different techniques based on physical and chemical treatments have been tested for the removal of external substances from puparia to make identification at species level feasible. Furthermore, the effects of these methods on successful molecular analyses have also been tested as molecular identification is becoming an important tool to complement morphological identifications. The results of this study indicate that cleaning via warm water/soap, the sonication and treatment with a sodium hydroxide solution are the best methods to achieve a good quality of the samples.

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