Effect of Hydrogen Peroxide on the Colour of the Fluorescence of Oestrone in Concentrated Sulphuric Acid

1963 ◽  
Vol 15 (1) ◽  
pp. 486-486 ◽  
Author(s):  
Aleksandra Smoczkiewiczowa ◽  
Roman Sioda
Keyword(s):  
Hydrogen Peroxide ◽  
Sulphuric Acid

New Post Etch Polymer Removal Process for Al-Interconnects and Vias in Tank and Spray Tools Using a New Inorganic Chemistry

2005 ◽  
Vol 103-104 ◽  
pp. 381-384
Author(s):  
Raimund Mellies ◽  
Stefan Kunz ◽  
Franz Nilius ◽  
Dieter Mayer ◽  
Andreas Kühner
Keyword(s):  
Inorganic Chemistry ◽  
Hydrogen Peroxide ◽  
Sulphuric Acid ◽  
Environmentally Friendly ◽  
Removal Process ◽  
Dielectric Layers ◽  
New Type ◽  
Etch Residue

A Post-Etch-Residue (PER) removal process for tank and spray tools has been developed using a new inorganic aqueous based chemistry. The performance of this new type of polymer remover, Inosolv 400 Fotopur®, on process wafers is compared with other inorganic chemistries such as DSP (Dilute Sulphuric acid hydrogen Peroxide) and DSP+, containing traces of HF. Inosolv 400 Fotopur® has improved polymer removal capabilities. Furthermore Inosolv 400 Fotopur® does not show any attack of the metal or dielectric layers and is inorganic based and thus environmentally friendly.

scholarly journals THE RATE CONSTANT OF THE REACTION BETWEEN FERROUS IONS AND HYDROGEN PEROXIDE IN ACID SOLUTION

1957 ◽  
Vol 35 (5) ◽  
pp. 428-436 ◽  
Author(s):  
T. J. Hardwick
Keyword(s):  
Hydrogen Peroxide ◽  
Acid Solution ◽  
Sulphuric Acid ◽  
Acid Concentration ◽  
Rate Constant ◽  
Perchloric Acid ◽  
Ferrous Ion ◽  
Ferrous Ions ◽  
Bimolecular Rate Constant

Identical values of the bimolecular rate constant of the ferrous ion – hydrogen peroxide reaction were obtained from intercomparisons of the methods previously used in following this reaction. In perchloric acid the bimolecular rate constant is unaffected by acid concentration; in sulphuric acid it increases slightly in acid concentrations above 10−2N. The results agree with and explain the differences between those obtained by Baxendale and by Dainton, but are only in marginal agreement with those recently reported by Weiss.

SEED TREATMENT METHODS AND DURATION EFFECTS ON GERMINATION OF WILD SUNFLOWER

2000 ◽  
Vol 36 (1) ◽  
pp. 63-69 ◽  
Author(s):  
J. O. AKINOLA ◽  
A. LARBI ◽  
G. O. FARINU ◽  
A. A. ODUNSI
Keyword(s):  
Hydrogen Peroxide ◽  
Sulphuric Acid ◽  
Seed Treatment ◽  
Lower Cost ◽  
Hot Water ◽  
Environmental Concerns ◽  
Hot Water Treatment ◽  
Tithonia Diversifolia ◽  
Wild Sunflower ◽  
Oven Drying

The effects were evaluated of six methods and six durations of seed treatment on the germination of wild sunflower (Tithonia diversifolia) seeds. The treatments were as follows: (1) hot water at 80 °C, (2) hot water at 100 °C, (3) oven-drying at 80 °C, (4) oven-drying at 100 °C, (5) immersion in concentrated sulphuric acid and (6) immersion in 10% hydrogen peroxide. The durations were 0, 2.5, 5, 10, 15 and 20 min. Treatment with hot water at 80 or 100 °C for 11–14 min, and oven-drying at 100 °C for 20 min all resulted in more than 65% germination 10 d after treatment. Oven-drying at 80 °C, immersion in concentrated sulphuric acid and in 10% hydrogen peroxide resulted in less than 50% germination. Based on the higher cumulative germination, lower cost, and environmental concerns, hot water treatment at 80 or 100 °C for 11–15 min is recommended.

Renewable Sugars Hydrolyzed from Banana Pseudo-Stem Using Different Chemical Pretreatments

2013 ◽  
Vol 372 ◽  
pp. 97-100 ◽  
Author(s):  
Mohammad Aisah ◽  
Surip Siti Norasmah ◽  
Ibrahim Wan Asma
Keyword(s):  
Hydrogen Peroxide ◽  
Sodium Hydroxide ◽  
Sulphuric Acid ◽  
Plant Cell Wall ◽  
Biofuel Production ◽  
Acid Mixture ◽  
Natural Material ◽  
Hydrolysis Time ◽  
Chemical Pretreatments ◽  
Renewable Sugars

Cellulose and hemicelluloses are the main building block of plant cell wall and are known as a natural polymer that usually used in the industries. Cellulose and hemicelluloses could be used as a feedstock for second generation biofuel production where it is subjected to hydrolysis into sugar after which it can be converted into bioethanol through fermentation process. In this study, the matured banana pseudo-stem is used as the source of hydrolyzing sugar from natural material. The objective of this research is to study the effects of different chemical pretreatments (sodium hydroxide, mixture of sodium hydroxide and hydrogen peroxide, sulphuric acid, mixture of sulphuric acid and hydrogen peroxide) and hydrolysis time (1-5 hours) on the sugar yield from banana pseudo-stem. Results showed that, after 3 hours hydrolysis most of the sugars from all chemical pretreatments reduced gradually. Analysis of sugar contents from acid hydrolysis process using High Pressure Liquid Chromatography (HPLC) showed that all the samples contained glucose, xylose, and arabinose where the highest glucose (16.02 mg/L) obtained from fiber treated with mixture of 1.0 M sulphuric acid and hydrogen peroxide. In addition, both highest xylose (64.23 mg/L) and arabinose (45.78 mg/L) are obtained from fiber treated with 0.5 M sodium hydroxide.

SEED TREATMENTS FOR ENHANCING GERMINATION OF WILD OKRA (Corchorus olitorius)

2003 ◽  
Vol 39 (4) ◽  
pp. 441-447 ◽  
Author(s):  
P. VELEMPINI ◽  
I. RIDDOCH ◽  
N. BATISANI
Keyword(s):  
Hydrogen Peroxide ◽  
Effective Treatment ◽  
Sulphuric Acid ◽  
Seed Treatment ◽  
Room Temperature ◽  
Hot Water ◽  
Leafy Vegetable ◽  
Corchorus Olitorius ◽  
Treatment Methods ◽  
Dry Heat

The effects of different seed treatment methods and durations of exposure on germination of wild okra (Corchorus olitorius), a traditional leafy vegetable consumed in many parts of Africa, were investigated. Seeds were exposed to seven treatments (hot water at 80 °C, hot water at 100 °C, dry heat at 80 °C, dry heat at 100 °C, concentrated sulphuric acid, 10% hydrogen peroxide and water at room temperature) for periods of up to 30 minutes. Exposure for five to 15 minutes in hot water at 80 °C was the most effective treatment for enhancing germination (>90%), followed by five minutes in hot water at 100 °C (80%) and 30 minutes in sulphuric acid (57%). Other treatments were less effective. Soaking seeds in hot water at approximately 80 °C for about 10 minutes can be recommended, therefore, to farmers as a simple, cheap and very effective way of germinating wild okra.

The reaction between peroxomonosulphuric acid and cerium(IV) in dilute sulphuric acid solutions

1970 ◽  
Vol 23 (4) ◽  
pp. 641 ◽  
Author(s):  
WHO Billing ◽  
GJ Bridgart ◽  
IR Wilson
Keyword(s):  
Hydrogen Peroxide ◽  
Sulphuric Acid ◽  
Acid Solutions ◽  
Radical Chain ◽  
Rate Law ◽  
Early Stages

The reaction of cerium(1V) with peroxomonosulphuric acid in aqueous sulphuric acid has been shown to involve a short radical chain. Rates of reaction of cerium(1V) have been measured in dilute sulphuric acid solutions. A substantial difference was found between the apparent rate law in the early stages of reaction and that observed later. This is not due to the presence of hydrogen peroxide in the peroxomonosulphate solutions. A tentative mechanism is proposed.

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