Drone‐based characterization of intertidal spring cold‐water plume dynamics

2021 ◽  
Vol 35 (6) ◽  
Author(s):  
Jason J. KarisAllen ◽  
Barret L. Kurylyk
Keyword(s):  
Cold Water ◽  
Plume Dynamics

scholarly journals Polysaccharides from Basidiocarps of Cultivating Mushroom Pleurotus ostreatus: Isolation and Structural Characterization

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2740 ◽  
Author(s):  
Ekaterina Baeva ◽  
Roman Bleha ◽  
Ekaterina Lavrova ◽  
Leonid Sushytskyi ◽  
Jana Čopíková ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Pleurotus Ostreatus ◽  
Cold Water ◽  
Water Soluble ◽  
Hot Water ◽  
Biologically Active ◽  
Alkaline Extract ◽  
A Cell ◽  
Oyster Mushrooms

Oyster mushrooms are an interesting source of biologically active glucans and other polysaccharides. This work is devoted to the isolation and structural characterization of polysaccharides from basidiocarps of the cultivated oyster mushroom, Pleurotus ostreatus. Five polysaccharidic fractions were obtained by subsequent extraction with cold water, hot water and two subsequent extractions with 1 m sodium hydroxide. Branched partially methoxylated mannogalactan and slightly branched (1→6)-β-d-glucan predominated in cold- and hot-water-soluble fractions, respectively. Alternatively, these polysaccharides were obtained by only hot water extraction and subsequent two-stage chromatographic separation. The alkali-soluble parts originating from the first alkali extraction were then fractionated by dissolution in dimethyl sulfoxide (DMSO). The polysaccharide insoluble in DMSO was identified as linear (1→3)-α-d-glucan, while branched (1→3)(1→6)-β-d-glucans were found to be soluble in DMSO. The second alkaline extract contained the mentioned branched β-d-glucan together with some proteins. Finally, the alkali insoluble part was a cell wall complex of chitin and β-d-glucans.

scholarly journals Characterization of organic-rich solids fractions isolated from Athabasca oil sand using a cold water agitation test

Fuel ◽  
1988 ◽  
Vol 67 (2) ◽  
pp. 221-226 ◽  
Author(s):  
Luba S. Kotlyar ◽  
John A. Ripmeester ◽  
Bryan D. Sparks ◽  
Douglas S. Montgomery
Keyword(s):  
Cold Water ◽  
Oil Sand

Preparation and Characterization of Cationic Cassia Tora Gum

2013 ◽  
Vol 781-784 ◽  
pp. 526-530 ◽  
Author(s):  
Shao Ying Li ◽  
Chun Mei Niu ◽  
Hua Yu Zhong
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Water Solubility ◽  
Cold Water ◽  
Water Solution ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Cassia Tora ◽  
Dispersing Agent

Series of cationic cassia tora gum (CCTG) were synthesized using 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHPTAC) as cationic etherifying agent, isopropanol-water solution as dispersing agent, in presence of sodium hydroxide under different reaction conditions. The optimum ratio for preparing the cationic cassia tora gum are that CHPTAC-CTG molar ratio is 0.6:1; NaOH-CHPTAC molar ratio is 1.3:1.The optimum conditions are that reaction temperature is 55°Cand reaction time is 3.5 h. The cold water solubility was improved apparently. The solution transmittance has corresponding relationship with the nitrogen content (N%) in the certain range, and the maximum transmittance is up to 87.2%. N% increased with the increase of reaction time and stable N% can be obtained in shorter reaction time at higher reaction temperature. The products were characterized by 13C-NMR. The heat resistance of CTG and CCTG were analyzed.

scholarly journals Characterization of culturable bacteria isolated from the cold-water coral Lophelia pertusa

2011 ◽  
Vol 77 (2) ◽  
pp. 333-346 ◽  
Author(s):  
Julia P. Galkiewicz ◽  
Zoe A. Pratte ◽  
Michael A. Gray ◽  
Christina A. Kellogg
Keyword(s):  
Cold Water ◽  
Culturable Bacteria ◽  
Lophelia Pertusa ◽  
Water Coral

scholarly journals SYNTHESIS AND ANTIOXIDANT EVALUATION OF 3-BROMO-FLAVONE

2019 ◽  
pp. 160-162
Author(s):  
AYU MASYITA ◽  
RISFAH YULIANTY ◽  
YUSNITA RIFAI
Keyword(s):  
Cold Water ◽  
Crystalline Powder ◽  
Synthetic Compound ◽  
Starting Compound ◽  
Antioxidant Evaluation ◽  
Flavone Derivatives ◽  
Layer Chromatography ◽  
Flavone Derivative ◽  
Yellow Crystalline Powder

Objective: The objective of the study was to obtain a flavone derivative compound through N-bromosuccinimide (NBS) reducing the reaction. Theantioxidant activity of the synthetic compound was then assayed by the 2,2-diphenyl-1-picrylhydrazyl method.Methods: Chalcone (3 mmol) as intermediate precursor was suspended with dimethyl sulfoxide and reacted with NBS (3 mmol), stirred at roomtemperature for 25 min and diluted in cold water. The synthesis of flavone derivatives resulted in yellow crystalline powder, freely soluble in methanoland ethanol, renamed 60% with a melting point of 87.7°C. Detection by thin-layer chromatography using hexane:chloroform (2:1) showed single spotwith Rf = 0.38 which is different from the Rf value of the starting compound (chalcone, 0.66 and 0.78).Results: The results of the characterization of the synthesized compound using ultraviolet-visible and Fourier transform-infared showed the groupcharacteristic containing C=C (1604.77 and 1639.49 cm-1), C=O (1681.93 cm-1), C-O-C (1242.16 cm-1), Ar-H (3032.1 and 3062.96 cm-1), and C-Br(663.51 cm-1) at maximum absorption of wavelength 253 nm.Conclusion: The synthesis of flavone using NBS resulted in 3-bromo-flavone with a weak antioxidant activity.

Characterization of Alum Crystals Synthesized from Waste Aluminium Beverage Cans

2016 ◽  
Vol 857 ◽  
pp. 514-518
Author(s):  
Y.M. Liew ◽  
Cheng Yong Heah ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Kamarudin Hussin ◽  
Soo Jin Tan
Keyword(s):  
High Purity ◽  
Cold Water ◽  
Ftir Spectra ◽  
Experimental Procedure ◽  
Percentage Yield

This study investigated the recycling of waste aluminium beverage cans into potash alum. The experimental procedure was carried out using concentrated H2SO4 and KOH solutions. The aluminium can pieces were dissolved in KOH solution. Then, the solution was reacted with H2SO4 solution and followed by crystallization in cold water. The results showed that the percentage yield of alum is 80% with 5 g of aluminium cans. The XRD, EDX and FTIR spectra of both commercial alum and prepared alum from experimental revealed that the two alums have essentially the same composition and have high purity.

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