Dynamic Electric Multipole Model for Colloid Particles

1990 ◽  
pp. 127-128 ◽  
Author(s):  
S. Yoshino
Keyword(s):  
Colloid Particles

Enzyme Multilayers on Colloid Particles:  Assembly, Stability, and Enzymatic Activity

Langmuir ◽  
2000 ◽  
Vol 16 (24) ◽  
pp. 9595-9603 ◽  
Author(s):  
Frank Caruso ◽  
Corinna Schüler
Keyword(s):  
Enzymatic Activity ◽  
Colloid Particles

Adhesion of Fine Particles at Solid/Solution Interfaces

MRS Bulletin ◽  
1990 ◽  
Vol 15 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Nikola Kallay
Keyword(s):  
Fine Particles ◽  
Plane Surface ◽  
Solid Surfaces ◽  
Liquid Media ◽  
Latex Dispersions ◽  
Colloid Particles ◽  
The Subject ◽  
Kinetic Investigations ◽  
The Stability ◽  
Kinetics Of

The adhesion of particles at solid surfaces in liquid media has attracted the attention of scientists because of its various applications as well as the theoretical significance of the processes involved. Early studies were characterized either by poorly defined systems or limited by the properties of a few morphologically well-defined model colloids, such as latex dispersions. Consequently, results were either of semiquantitative nature or were related to some specific cases, which eluded general conclusions. New methods for preparing uniform particles of different compositions, shapes, and sizes make it possible to approach the problem in a more comprehensive manner. For example, to demonstrate difficulties caused by polydispersity, it is sufficient to mention that the electrostatic interaction energy between a plane surface and a particle is approximately proportional to the particle radius, yet the rate of deposition depends exponentially on the height of the energy barrier.In principle, static and dynamic approaches may be employed in the study of particle adhesion. The static method yields the force required to detach an adhered particle, while kinetic investigations of attachment and detachment give the rates of the respective processes. Both methods offer information on the stability of the system in terms of the bond strength of adhered solids. For small colloid particles, which are the subject of thermal random Brownian motion, the dynamic approach is more appropriate. This article emphasizes the kinetics of deposition and detachment of small colloid particles in liquid media.

Flow of edema fluid into pulmonary airways

1983 ◽  
Vol 55 (4) ◽  
pp. 1262-1268 ◽  
Author(s):  
G. R. Mason ◽  
R. M. Effros
Keyword(s):  
Evans Blue ◽  
Left Atrial ◽  
Blue Dye ◽  
Edema Formation ◽  
Evans Blue Dye ◽  
Colloid Particles ◽  
Edema Fluid ◽  
Pulmonary Airways ◽  
99Mtc Sulfur Colloid

An in situ rabbit preparation was used to characterize the manner in which edema fluid enters the airways when left atrial pressures are elevated. The airways were initially filled with fluid to minimize retrograde flow of edema fluid into the alveoli. The airway solution contained 125I-albumin and in some studies [14C]sucrose, and the lungs were perfused with a comparable solution which contained albumin labeled with Evans blue dye and 99mTc-diethylenetriaminepentaacetate (DTPA) or 99mTc-sulfur-colloid particles (0.4-1.7 micron diam). After 30 min of perfusion, fluid was pumped from the airways into serial tubes. When left atrial pressures were low, there was very little transfer of labels detectable between the airway and perfusate solutions. However when left atrial pressures were increased to either 15 or 22 cmH2O, fluid entered the airways containing approximately the same concentrations of Evans blue dye and 99mTc-DTPA as those present in the perfusate. In contrast, the concentration of colloid particles averaged less than 5% perfusate concentrations, indicating that the fluid had not escaped through a tear in the barriers separating the vascular and airway compartments. Concentrations of the perfusate fluid and indicators were highest in the initial samples pumped from the airways. These observations suggest that some of the fluid entering the airways may be derived from peribronchial cuffs or that there are marked regional differences in edema formation from alveoli.

Synthesis and Characterization of Monodisperse TiO2 Colloid Particles

2006 ◽  
Vol 22 (03) ◽  
pp. 365-368
Author(s):  
WANG Peng ◽  
◽  
◽  
CHEN Dong ◽  
LIU Jian-Shu ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Colloid Particles

scholarly journals Derived high reducing sugar and lignin colloid particles from corn stover

BMC Chemistry ◽  
2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Wei Liu ◽  
Shengnan Zhuo ◽  
Mengying Si ◽  
Mengting Yuan ◽  
Yan Shi
Keyword(s):  
Corn Stover ◽  
Lignocellulosic Biomass ◽  
Alternative Energy ◽  
Reducing Sugar ◽  
Sugar Yield ◽  
Potential Candidate ◽  
Practical Utilization ◽  
Lignin Concentration ◽  
Colloid Particles ◽  
G Ratio

AbstractLignocellulosic biomass is considered as the largest potential candidate to develop alternative energy, such as biofuel, biomaterial. However, the efficient conversion of cellulose and practical utilization of lignin are great challenges for sustainable biorefinery. In this study, high reducing sugar yield and different size of lignin colloid particles (LCPs) were obtained via tetrahydrofuran–water (THF–H2O) pretreatment of corn stover (CS). THF–H2O as a co-solvent, could efficiently dissolve lignin and retain cellulose. After the pretreatment, 640.87 mg/g of reducing sugar was produced, that was 6.66-fold higher than that of the untreated CS. Meanwhile, the pretreatment liquor could form spherical LCPs with different sizes ranged from 202 to 732 nm through self-assembly. We studied the optimal pretreatment condition to simultaneously realize the high reducing sugar yield (588.4 mg/g) and excellent LCPs preparation with average size of 243 nm was under TH22 (THF–H2O pretreatment at 120 °C for 2 h). To further explore the formation of LCPs with different sizes. We studied the lignin structure changes of various conditions, concluded the size of LCPs was related to the lignin concentration and syringyl/guaiacyl (S/G) ratio. As the increase of the lignin concentration and S/G, the sizes of LCPs were increased. G-type lignin was easier to dissolve in the mild pretreatment supernatant, contributing to form smaller LCPs with a good dispersibility. In the severe condition, both of S and G-type lignin were dissolved due to the lignin depolymerization, formed the larger sphere particles. This work provides a novel perspective for the technical design of lignocellulosic biomass conversion.

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