Long-term oral n-acetylcysteine reduces exhaled hydrogen peroxide in stable COPD

2005 ◽  
Vol 18 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Fernando De Benedetto ◽  
Antonio Aceto ◽  
Beatrice Dragani ◽  
Antonella Spacone ◽  
Stefano Formisano ◽  
...  
Keyword(s):  
Hydrogen Peroxide

Bleaching optimization at WestRock mill in Covington, Virginia

TAPPI Journal ◽  
2016 ◽  
Vol 15 (9) ◽  
pp. 581-586 ◽  
Author(s):  
RICARDO B. SANTOS ◽  
PETER W. HART ◽  
DOUGLAS C. PRYKE ◽  
JOHN VANDERHEIDE
Keyword(s):  
Hydrogen Peroxide ◽  
Sodium Hydroxide ◽  
Chlorine Dioxide ◽  
Capital Expenditures ◽  
Equipment Repair ◽  
Optimization Program ◽  
Hardwood Pulp ◽  
Improved Performance

The WestRock mill in Covington, VA, USA, initiated a long term diagnostic and optimization program for all three of its bleaching lines. Benchmarking studies were used to help identify optimization opportunities. Capital expenditures for mixing improvement, filtrate changes, equipment repair, other equipment changes, and species changes were outside the scope of this work. This focus of this paper is the B line, producing southern hardwood pulp in a D(EP)DD sequence at 88% GE brightness. The benchmarking study and optimization work identified the following opportunities for improved performance: nonoptimal addition of caustic and hydrogen peroxide to the (EP) stage, carryover of D0 filtrate to the (EP) stage, and carryover of (EP) filtrate to the D1 stage. As a result of actions the mill undertook to address these opportunities, D0 kappa factor decreased about 5%, sodium hydroxide consumption in the (EP) stage decreased about 35%, chlorine dioxide consumption in the D1 stage decreased about 25%, and overall bleaching cost decreased about 15%.

Enhanced Long-Term Color Stability of Teeth Treated with Hydrogen Peroxide and Non-Thermal Atmospheric Pressure Plasma Jets

2014 ◽  
Vol 11 (11) ◽  
pp. 1010-1017 ◽  
Author(s):  
Seoul Hee Nam ◽  
Hyun Wook Lee ◽  
Jin Woo Hong ◽  
Hae June Lee ◽  
Gyoo Cheon Kim
Keyword(s):  
Hydrogen Peroxide ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Color Stability ◽  
Plasma Jets ◽  
Pressure Plasma

Formation of stable microspikes containing actin and the 55 kDa actin bundling protein, fascin, is a consequence of cell adhesion to thrombospondin-1: implications for the anti-adhesive activities of thrombospondin-1

1995 ◽  
Vol 108 (5) ◽  
pp. 1977-1990 ◽  
Author(s):  
J.C. Adams
Keyword(s):  
Hydrogen Peroxide ◽  
Actin Cytoskeleton ◽  
Adherent Cells ◽  
Perinuclear Region ◽  
Adhesive Properties ◽  
Focal Contacts ◽  
Thrombospondin 1 ◽  
Indirect Immunofluorescence Staining ◽  
In Cells

The organisation of the actin cytoskeleton was examined in H9c2 and human intestinal smooth muscle cells adherent on fibronectin or thrombospondin-1. Whereas cells adherent on fibronectin adopted a polygonal shape and rapidly assembled prominent stress fibres and focal contacts, cells adherent on thrombospondin-1 assumed a more irregular morphology with large lamellae containing radial actin microspikes. Focal contacts were not detected in cells adherent on thrombospondin-1, as determined by indirect immunofluorescence staining for vinculin and other focal contact components. Instead, the radial microspikes stained positively for the actin-bundling protein, 55 kDa/fascin, and myosins. In cells adherent on fibronectin, 55 kDa/fascin immunoreactivity was diffuse and tended to be concentrated in the perinuclear region. In long-term adherent cells cultured in serum-containing medium, 55 kDa/fascin was detected in membrane ruffles, in stress fibres and in the perinuclear region. The microspikes formed within 40 minutes of plating cells on thrombospondin-1 and remained present when cells were treated with sodium orthovandate and hydrogen peroxide to increase intracellular phosphotyrosine levels. Indeed, although vanadate-treated cells tended to retract, the microspikes became more prominent and showed an increased intensity of staining for fascin. Under these conditions, a proportion of the microspikes did not appear to be in contact with the substratum: these spikes stained weakly for focal adhesion kinase, talin and vinculin. Cells treated with genistein also spread and formed fascin-containing microspikes which tended to be more slender than those of control cells. In contrast, cells adherent on fibronectin displayed a complex rearrangement of the actin cytoskeleton and a transient enrichment of 55 kDa/fascin-containing structures at the cell surface when treated with sodium orthovanadate and hydrogen peroxide. These observations indicate that cell interactions with fibronectin or thrombospondin-1 send distinct organisational signals to the actin cytoskeleton and may offer a mechanistic framework for further investigations of the anti-adhesive properties of thrombospondin-1.

scholarly journals Indications and Use of Hydrogen Peroxide during Microvascular Flap Reconstruction Surgery: A Literature and Procedural Use Review

2017 ◽  
Vol 02 (01) ◽  
pp. e23-e25
Author(s):  
E. Rodriguez-Collazo ◽  
D. Riddle ◽  
K. Schmidtke
Keyword(s):  
Hydrogen Peroxide ◽  
Arterial Disease ◽  
Tissue Loss ◽  
Flap Reconstruction ◽  
Muscle Belly ◽  
Reconstruction Surgery ◽  
Microvascular Flap ◽  
Peripheral Arterial

AbstractMicrovascular flap reconstruction surgery is a limb preservation procedure performed in an effort to maintain the integrity of the lower limb and avoid amputations. Individuals facing the prospect of amputation often have long-term diabetes with multiple comorbidities, including severe peripheral vascular disease; peripheral arterial disease; chronic ulcerations; and Charcot arthropathy. Long-term clinical research has shown that these patients are at much higher risk for secondary amputations after a first amputation is performed. According to Sohn et al, Charcot and ulcer groups had 4.1 and 4.7 amputations per 100 person-years, respectively. In patients younger than 65 years old at the end of follow-up, amputation risk, relative to patients with Charcot alone, was 7 times higher for patients with ulcer alone and 12 times higher for patients with Charcot and ulcer. Patients with infected hardware, suffering from acute ulcerative conditions, may also be candidates for this type of surgery due to extensive tissue loss secondary to infection. Microvascular flap reconstruction surgery is a highly technical surgery involving the use of orthoplastic techniques, which is performed under ×3.5 loupe magnification. Due to the inability to perform this procedure with the use of a tourniquet, visibility within the field is obfuscated from continuous blood flow along the dissected muscle belly. Hydrogen peroxide (H2O2) is an excellent alternative to tourniquet use. The use of H2O2 allows additional benefits, such as visual field clearance and antisepsis.

Reversing clogging in subsurface-flow constructed wetlands by hydrogen peroxide treatment: two case studies

2009 ◽  
Vol 59 (10) ◽  
pp. 2037-2046 ◽  
Author(s):  
Jaime Nivala ◽  
Diederik P. L. Rousseau
Keyword(s):  
Hydrogen Peroxide ◽  
Constructed Wetlands ◽  
Subsurface Flow ◽  
Pilot Scale ◽  
Hydrogen Peroxide Treatment ◽  
Negative Effect ◽  
Subsurface Flow Constructed Wetlands ◽  
Full Scale Tests ◽  
Wetland Cell

One of the most frequently encountered operational problems in subsurface-flow constructed wetlands is clogging. Traditionally, the restoration procedure is to remove the clogged gravel or sand and replace it with clean material. This method, while effective, is costly and may require sections of the facility to be taken offline for extended periods of time. Another common remediation strategy is to have a resting period for each wetland cell, although this is not an option for very small systems which often consist of only one treatment cell. Recently, a more radical approach has been tested on a number of lab-scale and pilot-scale setups which consists of an aggressive oxidation of organic matter by means of hydrogen peroxide (H2O2). Results indicate that after treatment, clogging was substantially reduced and that H2O2 did not appear to have a long-term negative effect on plants and biofilms. The outcomes of two full-scale tests are discussed in this paper.

scholarly journals Case selection in dental bleaching

2021 ◽  
Vol 67 (3) ◽  
pp. 183-185
Author(s):  
Irina-Maria Gheorghiu ◽  
◽  
Paula Perlea ◽  
Sanziana Scarlatescu ◽  
George Nicola ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Treatment Plan ◽  
Dental Bleaching ◽  
Etiological Diagnosis ◽  
Aesthetic Result ◽  
Tooth Discoloration ◽  
Case Selection ◽  
Selection Of Patients ◽  
Selection Of

Dental bleaching is a method of treatment for tooth discoloration that uses hydrogen peroxide in various concentrations. For this dental maneuver to be successful, the etiological diagnosis of dental dyschromia and the treatment plan must be rigorously established. In this article we present the criteria underlying the selection of patients who can benefit from dental bleaching, grouped in a questionnaire. Adequate case selection suitable for teeth whitening, as well as the appropriate choice of the specific bleaching method are essential in obtaining satisfactory aesthetic result for the patient, immediately after completing the treatment, but also in the long term.

Long-Term Temporal Variability in Hydrogen Peroxide Concentrations in Wilmington, North Carolina USA Rainwater

2011 ◽  
Vol 45 (22) ◽  
pp. 9538-9542 ◽  
Author(s):  
Katherine M. Mullaugh ◽  
Robert J. Kieber ◽  
Joan D. Willey ◽  
G. Brooks Avery
Keyword(s):  
Hydrogen Peroxide ◽  
North Carolina ◽  
Temporal Variability
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