scholarly journals Spectroscopic and Computational Characterization of Diethylenetriaminepentaacetic Acid/Transplutonium Chelates: Evidencing Heterogeneity in the Heavy Actinide(III) Series

2018 ◽  
Vol 57 (17) ◽  
pp. 4521-4526 ◽  
Author(s):  
Gauthier J.-P. Deblonde ◽  
Morgan P. Kelley ◽  
Jing Su ◽  
Enrique R. Batista ◽  
Ping Yang ◽  
...  
Keyword(s):  
Diethylenetriaminepentaacetic Acid ◽  
Heavy Actinide

scholarly journals Spectroscopic and Computational Characterization of Diethylenetriaminepentaacetic Acid/Transplutonium Chelates: Evidencing Heterogeneity in the Heavy Actinide(III) Series

2018 ◽  
Vol 130 (17) ◽  
pp. 4611-4616 ◽  
Author(s):  
Gauthier J.-P. Deblonde ◽  
Morgan P. Kelley ◽  
Jing Su ◽  
Enrique R. Batista ◽  
Ping Yang ◽  
...  
Keyword(s):  
Diethylenetriaminepentaacetic Acid ◽  
Heavy Actinide

scholarly journals Grafting nanocellulose with diethylenetriaminepentaacetic acid and chitosan as additive for enhancing recycled OCC pulp fibres

Cellulose ◽  
2022 ◽  
Author(s):  
Ao Li ◽  
Dezhong Xu ◽  
Mengnan Zhang ◽  
Shengzhong Wu ◽  
Yu Li ◽  
...  
Keyword(s):  
Air Permeability ◽  
Recycling Rate ◽  
Hydroxyl Groups ◽  
Gravimetric Analysis ◽  
Diethylenetriaminepentaacetic Acid ◽  
Thermal Gravimetric ◽  
Tear Index ◽  
Bonding Area ◽  
Pulp Fibres

AbstractThis paper develops a novel paper additive for effectively recycling old corrugated container (OCC) by functionalizing nanocellulose (NC) with diethylenetriaminepentaacetic acid (DTPA) and chitosan (CS), and investigate the reinforcing mechanisms and effect of the developed additive on the physical properties of recycled OCC pulp handsheets. The tensile, tear and burst index, air permeability, tensile energy absorption (TEA), and drainage performance of the recycled OCC handsheets are examined. Fourier transform infrared FTIR) spectroscopy, thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM) are used for the chemical and microstructure characterization of both NC based additives and paper from recycled OCC pulp. The results show that functional groups on the NC based additive, such as carboxyl, amino and hydroxyl groups, can bond with the hydroxyl groups on the recycled OCC fibres to generate a chemical bond. This leads to an increase in the crosslinks and bonding area between the fibres, which increases their tensile strength and improves their recycling rate. SEM shows that the paper with NC based additives had tighter inter-fibre bonds and smaller paper pore structure. Addition of 0.3% NC-DTPA-CS additive results in optimal properties of the recycled OCC paper with an increase by 31.64%, 22.28% and 36.6% of tensile index, tear index, burst index respectively, and the air permeability decreases by 36.92%. Graphical Abstract

scholarly journals Grafting Nanocellulose With Diethylenetriaminepentaacetic Acid and Chitosan As Additive for Enhancing Recycled OCC Pulp Fibres

2021 ◽  
Author(s):  
Ao Li ◽  
Dezhong Xu ◽  
Mengnan Zhang ◽  
Shengzhong Wu ◽  
Yu Li ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Air Permeability ◽  
Recycling Rate ◽  
Hydroxyl Groups ◽  
Gravimetric Analysis ◽  
Diethylenetriaminepentaacetic Acid ◽  
Pulp Paper ◽  
Bonding Area ◽  
Pulp Fibres

Abstract This paper is to develop a novel paper additive for effectively recycling old corrugated container (OCC) by functionalizing nanocellulose (NC) with diethylenetriaminepentaacetic acid (DTPA) and chitosan (CS), and investigate the reinforcing mechanisms and effect of the developed additive on the physical properties of recycled OCC pulp handsheets. The tensile, tear and bursting strength, whiteness, air permeability, tensile energy absorption of the recycled OCC handsheets are examined. Fourier transform infrared FTIR) spectroscopy, thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM) are used for the chemical and microstructure characterization of both NC based additives and recycled OCC pulp paper. The results show that the functional groups, such as carboxyl, amino and hydroxyl groups on the NC based additives, can combine with the hydroxyl groups on the recycled OCC fibres to generate chemical bonds, which increase the crosslinks between fibres as well as the bonding area, thus enhancing their tensile strength and improving their recycling rate. SEM shows that the paper with NC based additives had tighter inter-fibre bonds and smaller paper pore structure. Addition of 0.2% NC-DTPA-CS additive results in optimal properties of the recycled OCC paper with an increase by 32%, 188%, 19% and 35% of tensile strength, tearing degree, breaking resistance and air permeability respectively.

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

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