Mass balances of major chemical constituents in Bohai Sea water II. Removal processes

1994 ◽  
Vol 12 (3) ◽  
pp. 236-245
Author(s):  
Li Yue
Keyword(s):  
Bohai Sea ◽  
Sea Water ◽  
Chemical Constituents ◽  
Mass Balances ◽  
Removal Processes ◽  
Major Chemical

Design Considerations for Space Mission Washwater Processing by Reverse Osmosis

1973 ◽  
Vol 95 (4) ◽  
pp. 1030-1038
Author(s):  
G. W. Wells ◽  
W. Wong ◽  
D. F. Putnam
Keyword(s):  
Reverse Osmosis ◽  
Chemical Constituents ◽  
Theoretical Estimate ◽  
Space Mission ◽  
Wash Water ◽  
Personal Hygiene ◽  
Published Data ◽  
Mass Balances ◽  
Major Chemical ◽  
The Impact

Reverse osmosis (RO) is shown to be a promising method of reclaiming wash water. The amounts of wash water and cleansing agent required for showering, personal hygiene, housekeeping, dish washing, laundry, and experiment purposes are presented and the impact of clothing types and laundry schedule are discussed. A theoretical estimate of the contaminants found in wash water is made based on published data for sebum, sweat, and other body excretions. An analytical method for calculating mass balances in a reverse osmosis recycle system is presented and concentrations of the major chemical constituents expected in the RO feed, product and brine streams are projected.

Isolation and HPLC Determination of the Chemical Components of Gentianella acuta (Michx.) Hulten

2018 ◽  
Vol 15 (1) ◽  
pp. 21-33
Author(s):  
Ying Wei ◽  
Yongqiao Liu ◽  
Yifan Hele ◽  
Weiwei Sun ◽  
Yang Wang ◽  
...  
Keyword(s):  
Medicinal Plant ◽  
High Speed ◽  
Chemical Constituents ◽  
Folk Medicine ◽  
Gradient Elution ◽  
Chemical Components ◽  
Isolation And Characterization ◽  
Major Chemical ◽  
Main Components ◽  
First Time

Background: Gentianella acuta (Michx.) Hulten is an important type of medicinal plant found in several Chinese provinces. It has been widely used in folk medicine to treat various illnesses. However, there is not enough detailed information about the chemical constituents of this plant or methods for their content determination. Objective: The focus of this work is the isolation and characterization of the major chemical constituents of Gentianella acuta, and developing an analytical method for their determination. Methods: The components of Gentianella acuta were isolated using (1) ethanol extraction and adsorption on macroporous resin. (2) and ethyl acetate extraction and high speed countercurrent chromatography. A HPLC-DAD method was developed using a C18 column and water-acetonitrile as the mobile phase. Based on compound polarities, both isocratic and gradient elution methods were developed. Results: A total of 29 compounds were isolated from this plant, of which 17 compounds were isolated from this genus for the first time. The main components in this plant were found to be xanthones. The HPLC-DAD method was developed and validated for their determination, and found to show good sensitivity and reliability. Conclusion: The results of this work add to the limited body of work available on this important medicinal plant. The findings will be useful for further investigation and development of Gentianella acuta for its valuable medicinal properties.

The effect of training on the swimming muscles of the goldfish (Carassius auratus)

1978 ◽  
Vol 74 (1) ◽  
pp. 115-122 ◽  
Author(s):  
W. Davison ◽  
G. Goldspink
Keyword(s):  
Carassius Auratus ◽  
Chemical Constituents ◽  
Water Environment ◽  
Muscle Fibres ◽  
Muscle Fibre Size ◽  
Goldfish Carassius Auratus ◽  
High Speeds ◽  
Major Chemical ◽  
All Speeds ◽  
Rates Of Growth

Goldfish (Carassius auratus) were exercised continuously for periods of 28 days at swimming speeds of 1.5, 3.0 and 4.5 body lengths per second and their rates of growth were determined. Changes in muscle fibre size were examined, as were changes which occurred in the concentrations of the major chemical constituents of these cells. These fish, typical of the carp family in that they are found only in still or slowly moving water, did not adapt well to the flowing water environment at any swimming speed. They often grew less than the controls, although consuming much more food. Changes in the composition of the muscle fibres indicated that excess food was not being stored, and also indicated that the major fuel for swimming at all speeds was glycogen. The fish survived well at high speeds and it was suggested that this was due to the ability of the species to metabolize glycogen anaerobically without the production of lactic acid.

Gas Chromatography Mass Spectrometry Application to Investigate of Phytonutrient Different Parts of Lotus

2021 ◽  
pp. 35-40
Author(s):  
Warachate Khobjai ◽  
◽  
Khemjira Jarmkom ◽  
Nakuntwalai Wisidsri ◽  
Surachai Techaoei
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Constituents ◽  
Gas Chromatography Mass Spectrometry ◽  
Plant Foods ◽  
Chromatography Mass Spectrometry ◽  
Phytochemical Constituents ◽  
Major Chemical ◽  
Mass Spectrometry Application ◽  
Different Parts

Phytonutrients, also called phytochemicals, are chemicals produced by plants. Foods and vegetables with phytonutrients have antioxidant and anti-inflammatory benefits. The aim of this study was to analyzed 4 parts of 3 lotuses phytochemical constituents by using gas chromatography mass spectrometry. Our results showed that different parts of lotus had a different chemical compound. The major chemical constituents in each extract are 6-Methoxy-2-[p-tolyl]cinchoninic acid (23.92%), Stigmastan-3, 5-diene (6.17%), 5(1H)-Azulenone, 2, 4, 6, 7, 8, 8a-hexahydro-3, 8-dimethyl-4-(1-methylethylidene)-, (8S-cis)- (24.44%), 2-Cyclohexane-1-carboxaldehyde, 2, 6-dimethyl-6-(4-methyl-3-pentennyl (18.15%), Stigmastan-3, 5-diene (24.04%), 2(1H)Naphthalenone, 3, 5, 6, 7, 8, 8a-hexanhydro-4, 8a-dimethyl-6-(1-methylethenyl)-(6.49%), 2-[p-Methoxyphenyl]-8-methylcinchoninic acid (12.98%), Ergosta-4, 6, 22-trien-3, beta, -ol (13.57%), and Stigmastan-3, 5-diene (26.05%). Therefore, Phytonutrients could also provide significant benefits for human’s health that eat plant foods.

scholarly journals Analysis of Major Chemical Constituents in Luan-Pao-Prescription Using Liquid Chromatography Coupled with Electrospray Ionization Mass Spectrometry

2008 ◽  
Vol 3 (5) ◽  
pp. 1934578X0800300
Author(s):  
Jin-qiang Zhang ◽  
Min Yang ◽  
Bao-hong Jiang ◽  
Hui-lian Huang ◽  
Guang-tong Chen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Electrospray Ionization ◽  
Chemical Constituents ◽  
Negative Ion ◽  
Female Sterility ◽  
Ionization Mass ◽  
Chinese Herbal ◽  
Major Chemical ◽  
First Time

Luan-Pao-Prescription is a famous Chinese herbal formula, which is commonly used for the treatment of female sterility in clinical practice in China. In the present paper, a reliable method based on liquid chromatography coupled with electrospray ionization tandem mass spectrometry in both positive and negative ion modes has been established for the analysis of major chemical constituents in Luan-Pao-Prescription. A total of 34 compounds were either identified or tentatively characterized. These compounds include flavonoids, anthraquinones, iridoids, xanthones and organic acids. Flavonoids were the major constituents of the formula. The results profiled the chemical composition of Luan-Pao-Prescription comprehensively for the first time.

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