Capillary barrier system for landfill capping

2013 ◽  
pp. 425-433 ◽  
Author(s):  
H Rahardjo ◽  
A Satyanaga ◽  
F Harnas ◽  
J Wang ◽  
E Leong
Keyword(s):  
Capillary Barrier

The Turnover in Normal Dogs of Prothrombin and Its Fragments; Effect of Induced Intravascular Coagulation

1979 ◽  
Vol 42 (02) ◽  
pp. 548-555 ◽  
Author(s):  
Charles A Owen ◽  
Kenneth G Mann ◽  
Frederic C McDuffie
Keyword(s):  
Close Agreement ◽  
Blood Stream ◽  
The Other ◽  
Normal Adult ◽  
Capillary Barrier ◽  
Prothrombin Fragment ◽  
Intravascular Coagulation ◽  
Dog Brain

SummaryWhen 125I-labeled canine prothrombin was given to normal adult dogs intravenously, it was calculated that 240% of the plasma prothrombin crossed the capillary barrier per day, 410% of the interstitial prothrombin returned to the blood stream daily, and 79% of the plasmatic prothrombin was catabolized per day. These data are in close agreement with those observed for bovine prothrombin in calves by Takeda (1970).When derived from normal dog prothrombin, prethrombin-1 is a mixture of 2 polypeptides, one larger than the other, and both present in about equal amounts. The longer peptide, “prethrombin-1-long,” was catabolized twice as fast as prothrombin, and the shorter, “prethrombin-1-short,” 4 times faster. Prothrombin fragment-1 was catabolized by the normal dog still more rapidly.The catabolism of prothrombin was not accelerated in 3 dogs receiving continuous infusions of a thromboplastic emulsion of dog brain. Nor was the level of prothrombin in their plasma remarkably altered.

The length and width of diatoms in drowning cases as the evidence of diatoms penetrating the alveoli-capillary barrier

2019 ◽  
Vol 134 (3) ◽  
pp. 1037-1042 ◽  
Author(s):  
Pingping Zhang ◽  
Xiaodong Kang ◽  
Shurui Zhang ◽  
Cheng Xiao ◽  
Yanbin Ma ◽  
...  
Keyword(s):  
Capillary Barrier

scholarly journals Solute permeability of the alveolar capillary barrier.

Thorax ◽  
1987 ◽  
Vol 42 (1) ◽  
pp. 1-10 ◽  
Author(s):  
M P Barrowcliffe ◽  
J G Jones
Keyword(s):  
Capillary Barrier ◽  
Solute Permeability ◽  
Alveolar Capillary

Geotextiles to Mitigate Frost Effects in Soils: A Critical Review

1996 ◽  
Vol 1534 (1) ◽  
pp. 5-11
Author(s):  
Karen S. Henry
Keyword(s):  
Field Trials ◽  
Frost Heave ◽  
Laboratory Research ◽  
Capillary Barrier ◽  
Subgrade Soil ◽  
Capillary Barriers ◽  
Geotechnical Structures ◽  
Barrier Performance ◽  
Base Course ◽  
Selection Of

The use of geotextiles to mitigate frost effects in soils has been studied, but few techniques have been developed. Guidelines developed for the placement of granular capillary barriers are presented to serve as preliminary guidelines for geotextile capillary barriers. Laboratory research shows that pore size distribution, wettability, and, for some geotextiles, thickness influence capillary barrier performance in a given soil. Geotextiles that easily wet do not reduce frost heave and may even exacerbate it. On the basis of the literature reviewed, guidance for selection of geotextile capillary barriers in field trials is given. If geotextiles function as capillary barriers during freezing and reinforce or separate and filter the subgrade at the base course interface during thaw, then the potential exists for their use in a combination of functions to reduce frost-related damage in geotechnical structures. It was found that properly designed geotextiles have the potential to reduce frost heave by functioning as capillary barriers, they can be filters for capillary barriers, and they can provide reinforcement or separation or filtration (or all of these) of the subgrade soil to reduce thaw-related damage.

Clearance of charged and uncharged dextrans from normal and injured lungs

1990 ◽  
Vol 68 (1) ◽  
pp. 341-347 ◽  
Author(s):  
M. P. Barrowcliffe ◽  
G. D. Zanelli ◽  
D. Ellison ◽  
J. G. Jones
Keyword(s):  
Clearance Rate ◽  
Dextran Sulfate ◽  
Molecular Size ◽  
Confidence Limits ◽  
Half Time ◽  
Capillary Barrier ◽  
Solute Transfer ◽  
Molecular Charge ◽  
Before And After ◽  
Alveolar Capillary

To examine how molecular charge affects the transfer of molecules across the alveolar-capillary barrier, we prepared the following dextrans of equivalent molecular size (mol wt 10,000) but varying molecular charge: neutral dextran, cationic DEAE dextran, and anionic dextran sulfate. These were labeled with 99mTc. The lungs of three groups of anesthetized rabbits were insufflated with dextran aerosols, with six rabbits receiving each type, and the half-time pulmonary clearance (t1/2) was measured. Control t1/2's (95% confidence limits) were 95 (74-120), 227 (192-268), and 291 (246-345) min for neutral, cationic, and anionic dextrans, respectively. One week later, when the same animals were restudied 4 h after 3 micrograms/kg iv endotoxin, t1/2's were 102 (75-139), 167 (149-187), and 126 (102-154) min, respectively. After 30 min during this repeat study, animals were ventilated with 20 breaths of cigarette smoke, which acutely increased the clearance rate to 34 (26-46), 25 (20-31), and 13 (7-24) min, respectively. Mean carboxyhemoglobin levels were not significantly different in the three groups: 13.6, 12.7, and 11.1%, respectively. These results demonstrated that neutral dextrans showed the same clearance rate before and after endotoxin, whereas the charged dextrans had a significantly faster clearance after endotoxin. After smoke exposure the anionic dextran left the lung more rapidly than the neutral dextran. Thus molecular charge affects solute transfer across the alveolar-capillary barrier in both normal and injured lungs, and an effect of endotoxin on the lung can be detected with charged dextrans but not with neutral dextran.

Sign in / Sign up

Export Citation Format

Share Document