scholarly journals Preparation and Antimicrobial Evaluation of Neem Oil Alkyd Resin and Its Application as Binder in Oil-Based Paint

2016 ◽  
Vol 6 (2) ◽  
pp. 92
Author(s):  
Haruna Musa ◽  
Sharif N. Usman
Keyword(s):  
Alkyd Resin ◽  
Bacterial Species ◽  
Acid Number ◽  
Neem Oil ◽  
Potential Applications ◽  
Antimicrobial Evaluation ◽  
Ft Ir ◽  
Titrimetric Determination ◽  
Microbiological Analyses

<p class="1Body">Neem oil Alkyd resin (NOAR) was synthesized by alcoholysis and polycondensation using glycerol and phthalic anhydride respectively at 230-250°C. The alkyd resin was characterized by FT-IR spectroscopy, viscometry, solubility in various solvents and antimicrobial activity against some selected bacterial species. FT-IR analyses indicated the successful synthesis of alkyd resin as also evident from titrimetric determination of acid number of the mixture which decreases as the reaction progresses. Microbiological analyses of the resin show that it is active against some selected bacterial specie particularly at concentrations of 100 and 50mg/ml in DMSO. The synthesized resin was used as binder in the formulation of oil-based paints using varying resin concentration i.e. 0, 10, and 20% w/v. The prepared paints were found to have excellent fastness properties to light, water, alkali but poor to xylene. The results obtained suggested that NOAR can serve as binder with potential applications in the production of antimicrobial paints.</p>

scholarly journals Rapid Determination of Water, Total Acid Number, and Phenolic Content in Bio-Crude from Hydrothermal Liquefaction of Biomass using FT-IR

2018 ◽  
Vol 32 (7) ◽  
pp. 7660-7669 ◽  
Author(s):  
René B. Madsen ◽  
Konstantinos Anastasakis ◽  
Patrick Biller ◽  
Marianne Glasius
Keyword(s):  
Phenolic Content ◽  
Rapid Determination ◽  
Acid Number ◽  
Hydrothermal Liquefaction ◽  
Total Acid ◽  
Total Acid Number ◽  
Ft Ir

scholarly journals Determination of photocatalytic process parameters on phenol degradation using TiO2-MWCNT (cocoPAS) composite

2021 ◽  
Vol 3 (2) ◽  
pp. 070-077
Author(s):  
Desi Heltina ◽  
Nadhia Gasani Putri ◽  
Panca Setia Utama ◽  
Komalasari ◽  
Bima Afiq Naufal
Keyword(s):  
Uv Light ◽  
Phenol Degradation ◽  
Degradation Temperature ◽  
Potential Applications ◽  
Multi Walled Carbon Nanotubes ◽  
Mixing Method ◽  
Ft Ir ◽  
Phenol Photodegradation ◽  
Walled Carbon Nanotubes

Multi-walled carbon nanotubes (MWCNT) were prepared by treatment of cocoPas and titanium dioxide nanocomposites TiO2 – MWCNT (cocoPAS) prepared by stirring and mixing method was used as a photocatalyst for the degradation of phenol in water under light irradiation. The morphology and microstructure of the composites were characterized with SEM, FT-IR, BET, XRD and UV-visible spectrophotometer. The purpose of this study were synthesize TiO2-MWCNT (cocoPAS) composite and evaluate its performance for photodegradation phenol. It was found that the degree of photodegradation of phenol under UV light was highly dependent on the concentration of phenol and the degradation temperature. The presence of MWCNT worked as the adsorbent and electron acceptor to efficiently enhance the phenol photodegradation. The as-prepared nanotubes, with surfactant contents, showed high- photocatalytic activities with increase degradation. These results indicate that TiO2 – MWCNT (cocoPAS)composites using cocoPAS can be used to enhance degradation and can expand potential applications for the degradation of organic pollutants.

Authentication of the Ancient Easel / Paintings Through Materials Identification from the Polychrome Layers II. Analysis by Means of the FT-IR Spectrophotometry

2008 ◽  
Vol 59 (4) ◽  
Author(s):  
Irina Crina Anca Sandu ◽  
Constantin Luca ◽  
Ion Sandu ◽  
Viorica Vasilache ◽  
Mikiko Hayashi
Keyword(s):  
Degradation Rate ◽  
Animal Glue ◽  
Painting Materials ◽  
Ageing Rate ◽  
Ir Spectrophotometry ◽  
Private And Public ◽  
Ft Ir

This is the second paper belonging to a study concerning the authentication of ancient easel-paintings, on canvas and wood support, from private and public collections, by using the FT-IR spectrophotometry technique for the analysis of the painting materials. Different pigments, egg binders, caseins and animal glue, often found in ancient easel-paintings on wood or canvas, have been used as standards for establishing the ageing rate of the paintings by correlation with the dates presented in the first note. The determination of the degradation rate of the painting materials is an important archaeometric characteristic used in authentication.

Fluorescence chemosensors for hydrogen sulfide detection in biological systems

The Analyst ◽  
2015 ◽  
Vol 140 (6) ◽  
pp. 1772-1786 ◽  
Author(s):  
Zhi Guo ◽  
Guiqiu Chen ◽  
Guangming Zeng ◽  
Zhongwu Li ◽  
Anwei Chen ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Biological Systems ◽  
Sulfate Reducing Bacteria ◽  
Fluorescence Sensing ◽  
Sulfate Reducing ◽  
Potential Applications ◽  
Reducing Bacteria

The development of H2S fluorescence-sensing strategies and their potential applications in the determination of sulfate-reducing bacteria activity.

scholarly journals Influence of a Natural Plant Antioxidant on the Ageing Process of Ethylene-norbornene Copolymer (Topas)

2021 ◽  
Vol 22 (8) ◽  
pp. 4018
Author(s):  
Anna Masek ◽  
Angelika Plota
Keyword(s):  
Mechanical Properties ◽  
Food Packaging ◽  
Colour Change ◽  
Good Alternative ◽  
Plant Origin ◽  
Aging Behavior ◽  
Current State ◽  
Ft Ir ◽  
Potential Use

In the field of polymer technology, a variety of mainly synthetic additives are used to stabilize the materials during processing. However, natural compounds of plant origin can be a green alternative to chemicals such as synthetic polyphenols. An analysis of the effect of hesperidin on the aging behavior of ethylene-norbornene copolymer was performed. The evaluation of changes in the tested samples was possible by applying the following tests: determination of the surface energy and OIT values, mechanical properties analysis, colour change measurements, FT-IR and TGA analyses. The obtained results proved that hesperidin can be effectively used as natural stabilizer for polymers. Furthermore, as a result of this compound addition to Topas-silica composites, their surface and physico-mechanical properties have been improved and the resistance to aging significantly increased. Additionally, hesperidin can act as a dye or colour indicator and only few scientific reports describe a possibility of using flavonoids to detect changes in products during their service life, e.g., in food packaging. In the available literature, there is no information about the potential use of hesperidin as a stabilizer for cycloolefin copolymers. Therefore, this approach may contribute not only to the current state of knowledge, but also presents an eco-friendly solution that can be a good alternative to synthetic stabilizers.

scholarly journals TITRIMETRIC DETERMINATION OF TOTAL ALDEHYDES IN CINNAMON BARK AND LEAF OILS USING CHLORAMINE-T REAGENT

1981 ◽  
Vol 4 (1) ◽  
pp. 35-41 ◽  
Author(s):  
M. L. SHANKARANARAYANA ◽  
B. RAGHAVAN ◽  
K. O. ABRAHAM ◽  
C. P. NATARAJAN
Keyword(s):  
Cinnamon Bark ◽  
Titrimetric Determination ◽  
Chloramine T
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