CELLULOSE CELLETS AS NEW TYPE OF ADSORBENT FOR THE REMOVAL OF DYES FROM AQUEOUS MEDIA

2015 ◽  
Vol 14 (3) ◽  
pp. 525-532 ◽  
Author(s):  
Daniela Suteu ◽  
Gabriela Biliuta ◽  
Lacramioara Rusu ◽  
Sergiu Coseri ◽  
Gabriela Nacu
Keyword(s):  
Aqueous Media ◽  
New Type

scholarly journals Tunable Boc Modification of Lignin and Its Impact on Microbial Degradation Rate

2018 ◽  
Author(s):  
Liuqun Gu ◽  
Meifeng Wang ◽  
Hui Li ◽  
Kai Ni Teh ◽  
Yiqun Li ◽  
...  
Keyword(s):  
Degradation Rate ◽  
Aqueous Media ◽  
White Rot ◽  
White Rot Fungus ◽  
Sodium Lignosulfonate ◽  
National Meeting ◽  
Breakdown Rate ◽  
Polymeric Implants ◽  
New Type ◽  
Modified Lignin

A new type of modified lignin, lignin-p-Boc was obtained through reaction with di-<i>tert</i>-butyl dicarbonate in aqueous media. Boc modification occurred regardless of types of lignin, was tunable, and proceeded well in recovering lignin at high purity from sodium lignosulfonate. Further reactivity of Lignin-p-BOC was demonstrated as a potential reactive filler in green plastic and as potential crosslinker in design of bioresorbable composite polymeric implants. Furthermore, the effects of the modification on the breakdown rate of alkali lignin by microbial (white rot fungus <i>P. chrysosporium</i>) was investigated, and the results showed that the modification obviously decreased <a>the breakdown rate</a>.<div>A pre-recorded video of my presentation in ACS Fall National Meeting 2020 see: <a href="https://doi.org/10.1021/scimeetings.0c06672" rel="nofollow" target="_blank">https://doi.org/10.1021/scimeetings.0c06672</a></div>

scholarly journals Tunable Boc Modification of Lignin and Its Impact on Microbial Degradation Rate

2021 ◽  
Author(s):  
Liuqun Gu ◽  
Meifeng Wang ◽  
Hui Li ◽  
Kai Ni Teh ◽  
Yiqun Li ◽  
...  
Keyword(s):  
Lignin Content ◽  
Aqueous Media ◽  
System Thinking ◽  
Sodium Lignosulfonate ◽  
Breakdown Rate ◽  
Covalent Bonds ◽  
Random Match ◽  
Polymeric Implants ◽  
New Type ◽  
Modified Lignin

<p>A new type of modified lignin, lignin-p-Boc, was obtained through reaction with di-<i>tert</i>-butyl dicarbonate (Boc<sub>2</sub>O) in aqueous media catalyzed by 4-dimethylaminopyridine (DMAP). Boc modification occurred regardless of type of lignin, was tunable, and proceeded well in recovering lignin at high purity from sodium lignosulfonate (a common byproduct from pulping industry; lignin content: 60%). Lignin-p-BOC was demonstrated as a potential reactive filler in green plastic and as a potential crosslinker in design of bioresorbable composite polymeric implants. Furthermore, the effects of the modification on the breakdown rate of alkali lignin by microbes was investigated, and the results showed that the modification substantially decreases the breakdown rate. The tunable Boc modification process was designed via a system thinking, including availability of raw lignin, economical/green modification, potentiality of drop-in-change to current thermoplastic processing, modification impact on microbial degradability/disposed environment at the end of use life; hence the holistic consideration makes this alternative method for upgrade of technical lignins very practical for future industrial application. Via forming “easily breakable covalent bonds” with thermopolymers, Lignin-p-BOCs are also promising to play an important role as both excellent binders via “random match” and reductants in transforming linear plastic waste into circular plastics.</p><br>

Tunable Boc Modification of Lignin and Its Impact on Microbial Degradation Rate

2018 ◽  
Author(s):  
Liuqun Gu ◽  
Meifeng Wang ◽  
Hui Li ◽  
Kai Ni Teh ◽  
Yiqun Li ◽  
...  
Keyword(s):  
Degradation Rate ◽  
Aqueous Media ◽  
White Rot ◽  
White Rot Fungus ◽  
Sodium Lignosulfonate ◽  
National Meeting ◽  
Breakdown Rate ◽  
Polymeric Implants ◽  
New Type ◽  
Modified Lignin

A new type of modified lignin, lignin-p-Boc was obtained through reaction with di-<i>tert</i>-butyl dicarbonate in aqueous media. Boc modification occurred regardless of types of lignin, was tunable, and proceeded well in recovering lignin at high purity from sodium lignosulfonate. Further reactivity of Lignin-p-BOC was demonstrated as a potential reactive filler in green plastic and as potential crosslinker in design of bioresorbable composite polymeric implants. Furthermore, the effects of the modification on the breakdown rate of alkali lignin by microbial (white rot fungus <i>P. chrysosporium</i>) was investigated, and the results showed that the modification obviously decreased <a>the breakdown rate</a>.<div>A pre-recorded video of my presentation in ACS Fall National Meeting 2020 see: <a href="https://doi.org/10.1021/scimeetings.0c06672" rel="nofollow" target="_blank">https://doi.org/10.1021/scimeetings.0c06672</a></div>

scholarly journals A thermoresponsive poly(ionic liquid) membrane enables concentration of proteins from aqueous media

2016 ◽  
Vol 52 (47) ◽  
pp. 7497-7500 ◽  
Author(s):  
Yuki Kohno ◽  
Douglas L. Gin ◽  
Richard D. Noble ◽  
Hiroyuki Ohno
Keyword(s):  
Ionic Liquid ◽  
Lower Critical Solution Temperature ◽  
Liquid Membrane ◽  
Aqueous Media ◽  
Water Soluble ◽  
Phase Behaviour ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
New Type ◽  
Poly Ionic Liquid

A new type of poly(ionic liquid) membrane, which shows switchable hydrated states via lower critical solution temperature-type phase behaviour, enables concentration of some water-soluble proteins from aqueous media.

scholarly journals Tunable Boc Modification of Lignin and Its Impact on Microbial Degradation Rate

2018 ◽  
Author(s):  
Liuqun Gu ◽  
Meifeng Wang ◽  
Hui Li ◽  
Kai Ni Teh ◽  
Yiqun Li ◽  
...  
Keyword(s):  
Microbial Degradation ◽  
High Purity ◽  
Degradation Rate ◽  
Aqueous Media ◽  
Sodium Lignosulfonate ◽  
Breakdown Rate ◽  
Alkali Lignin ◽  
New Type ◽  
Modified Lignin

A new type of modified lignin, lignin-p-Boc, was obtained through reaction with di-<i>tert</i>-butyl dicarbonate in aqueous media. Boc modification occurred regardless of types of lignin, was tunable, and proceeded well in recovering lignin at high purity from sodium lignosulfonate (a common byproduct from pulping industry). Lignin-p-BOC was demonstrated as a potential reactive filler in green plastic. Furthermore, the effects of the modification on the breakdown rate of alkali lignin by microbial was investigated, and the results showed that the modification obviously decreased <a>the breakdown rate</a>.

The Microstructure of Shock-Synthesized Diamond

1967 ◽  
Vol 25 ◽  
pp. 324-325
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
Preferred Orientation ◽  
High Magnification ◽  
Texture Pattern ◽  
Shock Process ◽  
New Type ◽  
Diffraction Diagram

A new type of synthetic industrial diamond formed by an explosive shock process has been recently developed by the Du Pont Company. This material consists of a mixture of two basically different forms, as shown in Figure 1: relatively flat and compact aggregates of acicular crystallites, and single crystals in the form of irregular polyhedra with straight edges.Figure 2 is a high magnification micrograph typical for the fibrous aggregates; it shows that they are composed of bundles of crystallites 0.05-0.3 μ long and 0.02 μ. wide. The selected area diffraction diagram (insert in Figure 2) consists of a weak polycrystalline ring pattern and a strong texture pattern with arc reflections. The latter results from crystals having preferred orientation, which shows that in a given particle most fibrils have a similar orientation.

New type electron gun with electrostatic and electromagnetic lenses

1978 ◽  
Vol 36 (1) ◽  
pp. 62-63
Author(s):  
T. Ichinokawa ◽  
H. Maeda
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Optimum Condition ◽  
Bias Voltage ◽  
Electron Gun ◽  
Charge Effect ◽  
Micro Fabrication ◽  
Maximum Brightness ◽  
New Type ◽  
The Ideal

I. IntroductionThermionic electron gun with the Wehnelt grid is popularly used in the electron microscopy and electron beam micro-fabrication. It is well known that this gun could get the ideal brightness caluculated from the Lengumier and Richardson equations under the optimum condition. However, the design and ajustment to the optimum condition is not so easy. The gun has following properties with respect to the Wehnelt bias; (1) The maximum brightness is got only in the optimum bias. (2) In the larger bias than the optimum, the brightness decreases with increasing the bias voltage on account of the space charge effect. (3) In the smaller bias than the optimum, the brightness decreases with bias voltage on account of spreading of the cross over spot due to the aberrations of the electrostatic immersion lens.In the present experiment, a new type electron gun with the electrostatic and electromagnetic lens is designed, and its properties are examined experimentally.

Sign in / Sign up

Export Citation Format

Share Document