Removing Mechanism of Bacteria of LKD in Bauxite Flotation Separation

2012 ◽  
Vol 454 ◽  
pp. 246-250
Author(s):  
Shu Yong Yang ◽  
Shu Juan Dai ◽  
Lian Tao Yu ◽  
Li Jia Deng
Keyword(s):  
Infrared Spectroscopy ◽  
Functional Groups ◽  
Infrared Spectra ◽  
Electric Potential ◽  
Strong Acid ◽  
Weak Acid ◽  
Reverse Flotation ◽  
Spectroscopy Analysis ◽  
Acid Ph ◽  
Neutral Conditions

The depressing function of bacteria of LKD on diaspore and kaolinite is studied through flotation experiments, mineral ζ-electric potential and infrared spectroscopy analysis. Waste beer has better selective and depressing effects on diaspore in the range pH 2-10 than starch-like substances do. The analysis of mineral ζ-electric potential and infrared spectra shows that the bacteria of LKD is chemically adsorbed to diaspore via its –COOH and stays on the surface of mineral firmly. Meanwhile, the functional groups -OH of yeast itself and some -COOH are hydrophilic, which helps the mineral being hydrophilic as well. Although the structure of phyllosilicate kaolinite determines its good floatability on the condition of strong acid, the recovery of diaspore by yeast is 30% more than kaolinite when the diaspore is depressed by bacteria of LKD on the condition of weak acid, pH-6. It indicates the possibility of Al-Si separation by reverse-flotation under neutral conditions.

Analyses on Hydrophily and Lipophilicity of Dust in Shanghai Different Traffic Concentration Areas

2011 ◽  
Vol 356-360 ◽  
pp. 990-993
Author(s):  
Jin Xia Yan ◽  
Hai Rong Wang ◽  
Dong Fang Li
Keyword(s):  
Infrared Spectroscopy ◽  
Benzene Ring ◽  
Functional Groups ◽  
Organic Pollutants ◽  
Motor Vehicle ◽  
Vehicle Exhaust ◽  
Spectroscopy Analysis ◽  
Main Component ◽  
Living Area ◽  
Lipophilic Substances

Based on process optimizing, in this article the dust was made a extraction analysis to investigate the ratio of lipophilic substances, which was collected in shanghai different traffic concentration areas. Also, the samples was made a infrared spectroscopy analysis to investigate the organic groups contained. It illustrates that the ratio of lipophilicity in traffic-intensive areas is higher up to 90.1 percent than in living area which is 33.5 percent, those of Shanghai suburb is the littlest, only 12.3 percent. the main functional groups of dust in Shanghai traffic-intensive areas are amino, associating hydroxyl, benzene ring, alkyl and-SH, which is similar to the main component of organic pollutants in motor vehicle exhaust.

scholarly journals Application of Near-Infrared Spectroscopy Analysis Technology to Total Nucleosides Quality Control in the Fermented Cordyceps Powder Production Process

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Tiannv Shi ◽  
Yongmei Guan ◽  
Lihua Chen ◽  
Shiyu Huang ◽  
Weifeng Zhu ◽  
...  
Keyword(s):  
Quality Control ◽  
Infrared Spectroscopy ◽  
Production Process ◽  
Process Monitoring ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Powder Preparation ◽  
Spectroscopy Analysis ◽  
Online Process Monitoring ◽  
Online Process

Product quality control is a prerequisite for ensuring safety, effectiveness, and stability. However, because of the different strain species and fermentation processes, there was a significant difference in quality. As a result, they should be clearly distinguished in clinical use. Among them, the fermentation process is critical to achieving consistent product quality. This study aims to introduce near-infrared spectroscopy analysis technology into the production process of fermented Cordyceps powder, including strain culture, strain passage, strain fermentation, strain filtration, strain drying, strain pulverizing, and strain mixing. First, high performance liquid chromatography (HPLC) was used to measure the total nucleosides content in the production process of 30 batches of fermented Cordyceps powder, including uracil, uridine, adenine, guanosine, adenosine, and the process stability and interbatch consistency were analyzed with traditional Chinese medicine (TCM) fingerprinting, followed by the near-infrared spectroscopy (NIRS) combined with partial least squares regression (PLSR) to establish a quantitative analysis model of total nucleosides for online process monitoring of fermented Cordyceps powder preparation products. The model parameters indicate that the established model with good robustness and high measurement precision. It further clarifies that the model can be used for online process monitoring of fermented Cordyceps powder preparation products.

THE INFRARED SPECTRA AND STRUCTURE OF POLYALDEHYDES: IV. THE HIGHER POLYALDEHYDES

1959 ◽  
Vol 37 (10) ◽  
pp. 1718-1721 ◽  
Author(s):  
A. Novak ◽  
E. Whalley
Keyword(s):  
Infrared Spectroscopy ◽  
Infrared Spectra

The polymers of n- and iso-butyraldehyde and n-valeraldehyde, which were made by subjecting the aldehydes to pressures of about 8 kb, have been examined by infrared spectroscopy. They are homologues of polyformaldehyde, having the formula HO(CHR•O)nH.

scholarly journals Isotope ratio infrared spectroscopy analysis of water samples without memory effects

2021 ◽  
Vol 35 (8) ◽  
Author(s):  
Stefan Graaf ◽  
Hubert B. Vonhof ◽  
Elan J. Levy ◽  
Monika Markowska ◽  
Gerald H. Haug
Keyword(s):  
Infrared Spectroscopy ◽  
Water Samples ◽  
Isotope Ratio ◽  
Memory Effects ◽  
Spectroscopy Analysis

Determination of Hydrocarbon Functional Groups by Infrared Spectroscopy

1952 ◽  
Vol 24 (4) ◽  
pp. 612-618 ◽  
Author(s):  
S. H. Hastings ◽  
A. T. Watson ◽  
R. B. Williams ◽  
J. A. Anderson
Keyword(s):  
Infrared Spectroscopy ◽  
Functional Groups

Fourier-Transform Infrared Spectroscopy of Environmentally Weathered Textile Fabrics for Enhanced Microplastic Identification

2021 ◽  
Author(s):  
Shreyas Patankar ◽  
Ekaterina Vassilenko ◽  
Mathew Watkins ◽  
Anna Posacka ◽  
Peter Ross
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Infrared Spectra ◽  
Environmental Fate ◽  
Uv Light ◽  
Natural Fibers ◽  
Fourier Transform Infrared ◽  
Ambient Conditions ◽  
Selection Of

<p>Microplastic pollution in oceans is among the global environmental concerns of our time. Emerging research on ocean environments indicates that microfibers, such as those originating from textiles, are some of the most commonly occurring type of microplastic contaminants. While Fourier-transform infrared spectroscopy (FTIR) is commonly used to identify and characterize pollutant samples obtained from the environment, this identification is challenging because infrared spectra of materials can be modified by exposure to the ocean, air, UV light, and other ambient conditions, in a process referred to as “weathering”. We report preliminary efforts in improving FTIR characterization of microplastics by building a library of infrared spectra of common textile fibers weathered under a selection of ambient conditions. Consumer textile materials including polyester, nylon, cotton, and other, were exposed to a selection of ambient conditions: ocean, air, and wastewater treatment stages, in a controlled weathering experiment. Infrared spectra were monitored for up to 52 weeks, with the resulting data illuminating on the environmental fate and longevity of synthetic and natural fibers. Spectral changes caused by weathering were found to depend strongly on both the composition of the material and the specific ambient conditions. This library of weathered material spectra is useful not only in easier identification of environmental microfibers, but also in helping us estimate the duration and manner of weathering that a given environmental microfiber may have experienced.</p>

scholarly journals Vasorelaxation Study and Tri-Step Infrared Spectroscopy Analysis of Malaysian Local Herbs

2016 ◽  
Vol 19 (2) ◽  
pp. 145-154 ◽  
Author(s):  
Mun Fei Yam ◽  
Yung Sing Ch’ng ◽  
Chu Shan Tan ◽  
Yean Chun Loh ◽  
Mariam Ahmad ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Spectroscopy Analysis
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