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Related Concept Videos

Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts10:37

Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts

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The design-of-experiments procedure presented here allows the evaluation of different flocculants in terms of their ability to aggregate dispersed particles in plant extracts, thus reducing turbidity and the costs of downstream...
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Superior Lacrimal Gland Removal: A Surgical Technique to Remove the Palpebral and Orbital Parts of Superior Lacrimal Gland from Rabbit Model04:06

Superior Lacrimal Gland Removal: A Surgical Technique to Remove the Palpebral and Orbital Parts of Superior Lacrimal Gland from Rabbit Model

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This video describes the surgical procedure to remove the two parts: palpebral and orbital of the superior lacrimal gland from a rabbit to create a dry eye disease model. This rabbit model is suitable for studies of ocular surface homeostasis, pathophysiology and ocular...
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Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis14:43

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

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A double stranded RNA interference (dsRNAi) technique is employed to down-regulate the maize cinnamoyl coenzyme A reductase (ZmCCR1) gene to lower plant lignin content. Lignin down-regulation from the cell wall is visualized by microscopic analyses and quantified by the Klason method. Compositional changes in hemicellulose and crystalline cellulose are...
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Green Synthesis, Characterization, Encapsulation, and Measurement of the Release Potential of Novel Alkali Lignin Micro-/Submicron Particles07:42

Green Synthesis, Characterization, Encapsulation, and Measurement of the Release Potential of Novel Alkali Lignin Micro-/Submicron Particles

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We describe novel, simple methodologies of synthesis and characterization of biocompatible lignin micro- and submicron particles. These formulations provide a facile approach for the utilization of the heteropolymer, as well as an alternative for the rational design of multifunctional carrier matrices with potential applicability in biomedicine, pharmaceutical technology, and the food...
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Spherical Coordinates01:23

Spherical Coordinates

14.8K
Spherical coordinate systems are preferred over Cartesian, polar, or cylindrical coordinates for systems with spherical symmetry. For example, to describe the surface of a sphere, Cartesian coordinates require all three coordinates. On the other hand, the spherical coordinate system requires only one parameter: the sphere's radius. As a result, the complicated mathematical calculations become simple. Spherical coordinates are used in science and engineering applications like electric and...
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High-speed Particle Image Velocimetry Near Surfaces11:59

High-speed Particle Image Velocimetry Near Surfaces

33.8K
A procedure for studying transient flows near boundaries using high-resolution, high-speed particle image velocimetry (PIV) is described here. PIV is a non-intrusive measurement technique applicable to any optically accessible flow by optimizing several parameter constraints such as the image and recording properties, the laser sheet properties, and analysis...
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Related Experiment Video

Updated: Jan 19, 2026

Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts
10:37

Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts

Published on: April 9, 2016

9.3K

Surface-modified spherical lignin particles with superior Cr(VI) removal efficiency.

Hyo Won Kwak1, Hyunji Lee2, Ki Hoon Lee3

  • 1Department of Forest Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea.

Chemosphere
|September 19, 2019
PubMed
Summary

Modified lignin particles effectively remove toxic chromium(VI) from water. This sustainable bio-sorbent offers high stability and reusability for environmental remediation.

Keywords:
Bio-sorbentHexavalent chromiumLigninPolyethylenimine

More Related Videos

Superior Lacrimal Gland Removal: A Surgical Technique to Remove the Palpebral and Orbital Parts of Superior Lacrimal Gland from Rabbit Model
04:06

Superior Lacrimal Gland Removal: A Surgical Technique to Remove the Palpebral and Orbital Parts of Superior Lacrimal Gland from Rabbit Model

3.8K
Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
14:43

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Published on: July 23, 2014

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Related Experiment Videos

Last Updated: Jan 19, 2026

Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts
10:37

Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts

Published on: April 9, 2016

9.3K
Superior Lacrimal Gland Removal: A Surgical Technique to Remove the Palpebral and Orbital Parts of Superior Lacrimal Gland from Rabbit Model
04:06

Superior Lacrimal Gland Removal: A Surgical Technique to Remove the Palpebral and Orbital Parts of Superior Lacrimal Gland from Rabbit Model

3.8K
Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
14:43

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Published on: July 23, 2014

13.9K

Area of Science:

  • Environmental Science
  • Materials Science
  • Polymer Chemistry

Background:

  • Lignin, a natural aromatic polymer, is abundant but its complex structure limits its use in environmental remediation.
  • Pristine lignin materials show insufficient adsorption performance compared to commercial adsorbents.
  • Developing stable and efficient lignin-based adsorbents is crucial for heavy metal removal.

Purpose of the Study:

  • To develop spherical lignin particles with enhanced physicochemical stability and high chromium(VI) adsorption capacity.
  • To investigate the effectiveness of polyethylenimine (PEI) modification on lignin's properties and adsorption capabilities.
  • To evaluate the reusability and potential of PEI-modified lignin for wastewater treatment.

Main Methods:

  • Spherical lignin particles were synthesized and modified using polyethylenimine (PEI).
  • The modified particles (PEI-lignin) were characterized for their structural and mechanical properties.
  • Chromium(VI) adsorption experiments were conducted to determine removal capacity and efficiency.

Main Results:

  • PEI modification significantly improved the mechanical properties and water stability of lignin particles.
  • PEI-lignin particles demonstrated a superior Cr(VI) removal capacity of 657.9 mg/g, the highest for PEI-modified natural adsorbents.
  • The adsorption mechanism involves intra-particle diffusion, adsorption, covalent bonding, and reduction, with excellent reusability observed.

Conclusions:

  • PEI-lignin particles are highly stable and efficient bio-sorbents for Cr(VI) removal from wastewater.
  • The developed lignin-based bio-sorbent offers a sustainable and cost-effective solution for heavy metal remediation.
  • This approach supports bio-resource recycling and provides a high-performance material for environmental detoxification.