Two novel porous MOFs with square-shaped cavities for the removal of toxic dyes: adsorption or degradation?

2017 ◽  
Vol 41 (24) ◽  
pp. 15204-15209 ◽  
Author(s):  
Huijun Li ◽  
Qingqing Li ◽  
Yaling He ◽  
Zhouqing Xu ◽  
Qingjie Tang
Keyword(s):  
Toxic Dyes ◽  
Dyes Adsorption ◽  
Degradation Properties ◽  
The Relationship

Two new networks with different-sized pores were constructed. Their adsorption and degradation properties were studied in detail to clarify the relationship between adsorption and degradation.

scholarly journals Evaluation of the Relationship among Biogenic Amines, Nitrite and Microbial Diversity in Fermented Mustard

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6173
Author(s):  
Yangyang Yu ◽  
Lu Li ◽  
Yujuan Xu ◽  
Kejing An ◽  
Qiao Shi ◽  
...  
Keyword(s):  
Biogenic Amines ◽  
High Throughput Sequencing ◽  
Starter Cultures ◽  
Sequencing Analysis ◽  
Maximum Residue Limit ◽  
Safety Standard ◽  
Bacteria And Fungi ◽  
High Level ◽  
Degradation Properties ◽  
The Relationship

Biogenic amines (BAs) and nitrites are both considered harmful compounds for customer health, and are closely correlated with the microorganisms in fermented mustard (FM). In this study, BAs and nitrite contents in fifteen FM samples from different brands were analyzed. The concentrations of cadaverine in one sample and of histamine in one sample were above the toxic level. Moreover, five FM samples contained a high level of nitrite, exceeding the maximum residue limit (20 mg/kg) suggested by the National Food Safety Standard. Then, this study investigated bacterial and fungal communities by high-throughput sequencing analysis. Firmicutes and Basidiomycota were identified as the major bacteria and fungi phylum, respectively. The correlations among microorganisms, BAs and nitrite were analyzed. Typtamine showed a positive correlation with Lactobacillus and Pseudomonas. Cadaverine and nitrite is positively correlated with Leuconostoc. Furthermore, thirteen strains were selected from the samples to evaluate the accumulation and degradation properties of their BAs and nitrite. The results indicated that the Lactobacillus isolates, including L. plantarum GZ-2 and L. brevis SC-2, can significantly reduce BAs and nitrite in FM model experiments. This study not only assessed the contents of BAs and nitrite in FM samples, but also provided potential starter cultures for BAs and nitrite control in the FM products industry.

scholarly journals Rheological, Thermal, and Degradation Properties of PLA/PPG Blends

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3519 ◽  
Author(s):  
Dong Xie ◽  
Yang Zhao ◽  
Yuan Li ◽  
Anna Marie LaChance ◽  
Jinqing Lai ◽  
...  
Keyword(s):  
Melt Processing ◽  
Polypropylene Glycol ◽  
Melt Viscosity ◽  
Pseudoplastic Fluid ◽  
Capillary Rheometry ◽  
Torque Rheometry ◽  
Fluid Behavior ◽  
Degradation Degree ◽  
Degradation Properties ◽  
The Relationship

The work presented herein focuses on simulating the compounding process via a torque rheometer, as well as the relationship between the melt viscosity and the polymer molecular weight (MW). We aim to predict the plasticization of polylactic acid (PLA) using polypropylene glycol (PPG) with different MWs. The rheological properties of the PLA/PPG composites containing PPG with different MWs were systematically studied by capillary rheometry and torque rheometry. The initial degradation of PLA/PPG composites during melt processing was monitored in real time. The results indicate that PPG can significantly reduce the melt viscosity of PLA/PPG composites, leading to obvious pseudoplastic fluid behavior. The lower the MW of PPG, the lower the viscosity of the PLA/PPG composite. The addition of PPG was favorable for the degradation of PLA during processing, and the degradation degree of the composite materials increased as the MW of PPG was decreased.

Adsorption of Dyes in Aqueous Medium Using RHA and CFA

2020 ◽  
pp. 458-475
Author(s):  
Irvan Dahlan ◽  
Sariyah Mahdzir
Keyword(s):  
Coal Fly Ash ◽  
Adsorption Removal ◽  
Surface Models ◽  
Naoh Solution ◽  
Co Precipitation ◽  
Dyes Adsorption ◽  
The Relationship ◽  
Zeta Potential Analysis ◽  
Acid Violet ◽  
Acid Violet 7

The preparation of adsorbent from the mixture of rice husk ash (RHA) and coal fly ash (CFA) has been investigated for adsorption of acid violet 7 (AV7) and brilliant green (BG) dyes. The RHA-CFA adsorbents were prepared using three different methods, i.e. reflux, magnetic co-precipitation, and magnetic template. Five different additives were used in reflux method. The results showed that RHA-CFA adsorbent prepared through reflux methods using NaOH and Na2CO3 shows higher dyes adsorption removal as compared to other methods. From zeta potential analysis, the electric charge of the outer layer of prepared adsorbent shows no effect towards adsorption of AV7 and BG dyes. By using a 3-factor, 3-level factorial design, the relationship between all variables was studied. From the response surface models, the optimum adsorbent preparation variables could be obtained by using RHA-CFA adsorbent prepared by refluxing 3:1 ratio of RHA to CFA in 1.21 M NaOH solution. The results indicated that the optimized values agree reasonably well with the validated experimental results.

The Role of Polymer Binder in Ceramic Injection Moulding

2013 ◽  
Vol 581 ◽  
pp. 82-88 ◽  
Author(s):  
Davit Bleyan ◽  
Berenika Hausnerová
Keyword(s):  
Thermal Degradation ◽  
Injection Moulding ◽  
Sintering Behavior ◽  
Alumina Powder ◽  
System Composition ◽  
Polymeric Binders ◽  
Ceramic Injection Moulding ◽  
Degradation Properties ◽  
The Relationship

In this study thermal degradation of feedstock based on Al2O3 high compressible superground powder was investigated. The alumina powder was mixed with polymeric binders to compose the feedstock. Binder systems for CIM (Ceramic Injection Moulding) technology differed in concentration and composition of polyethylene, polyethylene glycol, low density polyethylene and waxes. The debinding and pre-sintering behavior of formulated feedstocks was characterized by thermogravimetric analysis. The results demonstrated the relationship between the feedstock thermal degradation properties and the binder system composition.

Interstellar gas in the central region of the Galaxy

1967 ◽  
Vol 31 ◽  
pp. 239-251 ◽  
Author(s):  
F. J. Kerr
Keyword(s):  
Central Region ◽  
Galactic Plane ◽  
Neutral Hydrogen ◽  
Continuum Emission ◽  
Galactic Centre ◽  
Interstellar Gas ◽  
Hydrogen Recombination ◽  
The Galaxy ◽  
Centre Region ◽  
The Relationship

A review is given of information on the galactic-centre region obtained from recent observations of the 21-cm line from neutral hydrogen, the 18-cm group of OH lines, a hydrogen recombination line at 6 cm wavelength, and the continuum emission from ionized hydrogen.Both inward and outward motions are important in this region, in addition to rotation. Several types of observation indicate the presence of material in features inclined to the galactic plane. The relationship between the H and OH concentrations is not yet clear, but a rough picture of the central region can be proposed.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Choosing a Markov blanket

2020 ◽  
Vol 43 ◽  
Author(s):  
Thomas Parr
Keyword(s):  
Markov Blanket ◽  
Target Article ◽  
The Relationship

Abstract This commentary focuses upon the relationship between two themes in the target article: the ways in which a Markov blanket may be defined and the role of precision and salience in mediating the interactions between what is internal and external to a system. These each rest upon the different perspectives we might take while “choosing” a Markov blanket.

Tinkering with cognitive gadgets: Cultural evolutionary psychology meets active inference

2019 ◽  
Vol 42 ◽  
Author(s):  
Paul Benjamin Badcock ◽  
Axel Constant ◽  
Maxwell James Désormeau Ramstead
Keyword(s):  
Evolutionary Psychology ◽  
Research Program ◽  
Active Inference ◽  
Innovative Research ◽  
Cognitive Faculties ◽  
Cultural Evolutionary ◽  
The Relationship

Abstract Cognitive Gadgets offers a new, convincing perspective on the origins of our distinctive cognitive faculties, coupled with a clear, innovative research program. Although we broadly endorse Heyes’ ideas, we raise some concerns about her characterisation of evolutionary psychology and the relationship between biology and culture, before discussing the potential fruits of examining cognitive gadgets through the lens of active inference.

Radiation Damage, Contrast and Statistics in High Resolution Biological Electron Microscopy

1970 ◽  
Vol 28 ◽  
pp. 260-261
Author(s):  
Robert M. Glaeser
Keyword(s):  
High Resolution ◽  
Particle Flux ◽  
Unit Area ◽  
Signal To Noise ◽  
Resolution Image ◽  
High Resolution Image ◽  
Pass Through ◽  
Counting Statistics ◽  
The Relationship ◽  
Picture Element

It is well known that a large flux of electrons must pass through a specimen in order to obtain a high resolution image while a smaller particle flux is satisfactory for a low resolution image. The minimum particle flux that is required depends upon the contrast in the image and the signal-to-noise (S/N) ratio at which the data are considered acceptable. For a given S/N associated with statistical fluxtuations, the relationship between contrast and “counting statistics” is s131_eqn1, where C = contrast; r2 is the area of a picture element corresponding to the resolution, r; N is the number of electrons incident per unit area of the specimen; f is the fraction of electrons that contribute to formation of the image, relative to the total number of electrons incident upon the object.

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