scholarly journals Chemical and Application Properties of Some Solvent and Water Based Coatings on Wooden Substrate

2019 ◽  
Vol 70 (2) ◽  
pp. 107-114
Author(s):  
Shikhar Shukla ◽  
Krishna K. Pandey ◽  
Kishan Kumar V. S.
Keyword(s):  
Chemical Characterization ◽  
Wood Products ◽  
Organic Coatings ◽  
Aesthetic Value ◽  
Wood Coatings ◽  
Volatile Organic ◽  
Water Based ◽  
The Aesthetic ◽  
Water Borne

Wood finishes are used extensively to improve the aesthetic value and protect wood products from moisture. These organic coatings generally contain volatile organic compounds (VOC) as solvents that evaporate when the coatings cure over the surface. Due to strict legislations against these hazardous VOCs, the buyers across the globe are shifting towards products finished with water borne coats. Two of the most commonly used wood coatings in India are polyurethane and nitrocellulose (NC) lacquer. This paper aims at comparing these two wood coatings with their water borne counterparts. The study was conducted on the wood substrate of Melia dubia. Chemical characterization of the cured coats was attempted through FTIR spectroscopy. Physical appearances in terms of gloss and film thickness were also studied. Bands of urethane, urea and nitric groups were identified, which helped in understanding the changes in chemical structure of the finishes after curing. The thickness of the organic coatings was significantly higher than that of their water-borne counterparts. Gloss of water based coatings was observed to be lesser than that of their organic solvent based counterparts in either coating material. In case of lacquer, the reduction was up-to 33 %. whereas in case of PU, gloss dropped down by about 54 %.

scholarly journals Constitutive Expression of Aechmea fasciata SPL14 (AfSPL14) Accelerates Flowering and Changes the Plant Architecture in Arabidopsis

2018 ◽  
Vol 19 (7) ◽  
pp. 2085 ◽  
Author(s):  
Ming Lei ◽  
Zhi-ying Li ◽  
Jia-bin Wang ◽  
Yun-liu Fu ◽  
Meng-fei Ao ◽  
...  
Keyword(s):  
Plant Architecture ◽  
Ornamental Plants ◽  
Constitutive Expression ◽  
Aesthetic Value ◽  
Vegetative Organs ◽  
Squamosa Promoter Binding Protein ◽  
Aechmea Fasciata ◽  
Ethephon Treatment ◽  
The Aesthetic

Variations in flowering time and plant architecture have a crucial impact on crop biomass and yield, as well as the aesthetic value of ornamental plants. Aechmea fasciata, a member of the Bromeliaceae family, is a bromeliad variety that is commonly cultivated worldwide. Here, we report the characterization of AfSPL14, a squamosa promoter binding protein-like gene in A. fasciata. AfSPL14 was predominantly expressed in the young vegetative organs of adult plants. The expression of AfSPL14 could be upregulated within 1 h by exogenous ethephon treatment. The constitutive expression of AfSPL14 in Arabidopsis thaliana caused early flowering and variations in plant architecture, including smaller rosette leaves and thicker and increased numbers of main inflorescences. Our findings suggest that AfSPL14 may help facilitate the molecular breeding of A. fasciata, other ornamental and edible bromeliads (e.g., pineapple), and even cereal crops.

scholarly journals Chemical characterization of volatile organic compounds on animal farms

2008 ◽  
Vol 53 (No. 12) ◽  
pp. 641-651 ◽  
Author(s):  
M. Ciganek ◽  
J. Neca
Keyword(s):  
Volatile Fatty Acids ◽  
Carbon Disulphide ◽  
Chemical Characterization ◽  
Road Dust ◽  
Soil Samples ◽  
Outdoor Air ◽  
Volatile Organic ◽  
Volatile Aromatic Compounds ◽  
Indoor And Outdoor

More than one hundred volatile organic substances were identified by gas chromatography and mass spectrometry (GC/MS) in the indoor and outdoor air, stable and farm road dust and farm soil samples from two pig and cattle farms in the South Moravian Region. Volatile fatty acids (acetic, propanoic, butanoic and pentanoic acids) and their esters dominated along with aldehydes (butanal, pentanal and hexanal) and 4-methylphenol in the indoor and outdoor air samples. Road dust and soil samples contained mainly volatile aromatic compounds (toluene, benzene, ethylbenzene, styrene and xylenes), aliphatic hydrocarbons (largely n-alkanes), dichloromethane and carbon disulphide. The health risks associated with particular volatile compounds detected in the indoor and outdoor samples from the farms need to be assessed.

A Study on Dynamic Volatile Organic Compound Emission Characterization of Water-Based Paints

2011 ◽  
Vol 61 (1) ◽  
pp. 35-45 ◽  
Author(s):  
Yu-Min Chang ◽  
Wei-Hsing Hu ◽  
Wen-Bing Fang ◽  
Shiao-Shing Chen ◽  
Chang-Tang Chang ◽  
...  
Keyword(s):  
Organic Compound ◽  
Volatile Organic Compound ◽  
Volatile Organic Compound Emission ◽  
Volatile Organic ◽  
Water Based

CHEMICAL CHARACTERIZATION OF ODOR ACTIVE VOLATILE ORGANIC COMPOUNDS EMITTED FROM PERFUMES BY GC/MS-O

2016 ◽  
Vol 15 (9) ◽  
pp. 1963-1969 ◽  
Author(s):  
Gianluigi de Gennaro ◽  
Antonella Amenduni ◽  
Magda Brattoli ◽  
Federica Massari ◽  
Jolanda Palmisani ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Chemical Characterization ◽  
Volatile Organic

Study on Temperature Control Microcapsule Drying Agent Applies to Water-Based Gravure Ink

2013 ◽  
Vol 469 ◽  
pp. 46-50 ◽  
Author(s):  
Ying Jie Xu ◽  
Xian Fu Wei ◽  
Bei Qing Huang
Keyword(s):  
Calcium Oxide ◽  
Temperature Control ◽  
Gravure Printing ◽  
Agent Based ◽  
Hydrophobic Compound ◽  
Volatile Organic ◽  
Water Based ◽  
Printing Ink ◽  
Printing Machine

The water-based gravure ink does not contain volatile organic solvent, which is an environmentally friendly ink. But slow drying is a bottleneck of water-based gravure ink in use. Proposed the water in Water-based gravure ink reacts with temperature control microcapsule drying agent when heated in drying box of gravure printing machine to increase the ink drying speed. Designed preparation purification and drying methodthe of calcium oxide microcapsules, which surface is coated with hydrophobic compound and surfactant. The coating layer of Water-based gravure ink drying agent has good water resistance below 60°C, which will drop from the surface of the calcium oxide in the process of temperature continues to rise. Use the rheometer to test the rheology of water-based gravure ink contain microcapsule drying agent, characterization of the drying effect of the microcapsule drying agent based on the change in viscosity of the ink. Experimental results show that, the excitation temperature of the drying agent is 40°C. The Prepared temperature control microcapsule drying agent can effectively improve the drying speed of the water-based gravure printing ink.

Olfactory and Chemical Characterization of Indoor Air-Towards a Psychophysical Model for Air Quality

1981 ◽  
Author(s):  
Birgitta Berglund ◽  
Ulf Berglund ◽  
Thomas Lindvall ◽  
Helene Nicander-Bredberg
Keyword(s):  
Air Quality ◽  
Indoor Air ◽  
Chemical Characterization
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