Do you want to publish a course? Click here

A Study On Improving The Bleaching Performance Of The Local Detergents With Low Contents Of Soduim Perborates

زيادة قدرة المنظفات المحلية على التبييض الأكسيجني للقماش القطني المقصور بوجود محتويات منخفضة نسبيًا من بربورات الصوديوم رباعية و أحادية الهدرات

1653   0   32   0 ( 0 )
 Publication date 2001
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

The Syrian detergent companies used to add high percentage of perborate salt in laundry detergents formulation to achieve best bleaching and cleaning results. And usually the bleach activator which transforms the peroxides into more effective materials, was added to the formulation in non specified doses. The studies have been made of the effect of the bleach activator -TAED on the perborates salt show the possibility to reduce the amount of the used perborates by controlling the - Perborates / TAED percentage in the detergent formulation . The released active oxygen depends on the ambiant temperature where weak activity where detected when temperature exceeds ٦٠ celsius. This study shows the role of the detergent formulation on the bleach activator where it releases the active oxygen in a higher percentage when monohydrate sodium perborate is used, and no effects were detected on the tensile strength of the used fabric.

References used
A.S.Davidson ,B.Milwidsky ;Synthetic Detergents. ١٩٨٧. ٧ th. ed. ,longman , New York
M.S. Showell. ١٩٩٨. Powdered Detergent,Volume ٧١, PP. ١-١٩ Surfactant Science Series
D.M.Coons. ١٩٧٨. J.Am. Oil Chemists, Soc Jan. vol.٥٥, ١٠٤-١٠٨
rate research

Read More

Bleaching process of cotton fabrics consider an important and sensitive operations in wet chemical treatments of cotton fabrics, mercerization is not less important than them and that in cases in which is made necessary, but from the problems of t hese processes are long time and consumption of energy, but the ultrasound energy contribute to reduce these problems.
Syria consumes as many as ١٢٨ thousand tons of detergents yearly. The powder detergent with added enzyme represents is about ٣٥ % of the total production .The enzyme content in the detergent is ٠,٥-١,٠ %. Amylases, Lipases, Proteases, and cellulas es are the main enzymes used in detergents. Enzymes are known to have protein structure and play role in biocatalysts during the cleaning process. Enzyme activity is affected by heat and the detergent s components such as oxidants, bleachers, and brighters. This research was focused on using Volgemyta method, which traditionally used for saliva and blood analyses to determent the Amylase activity in detergents produced in Syria. The result in dicate that this setteed may be used to determent the commercial Amylase activity in water, and in ٠,١ % Sodium chloride water solution, and finally in physiological solutions . The effect of the different detergents on the Amylase activity has been studied as well. As a result, the addition of any extra amount of Amylase makes no increase or improvement in the cleaning performance of the detergent.
The following Fungal species were isolated from therhizosphere of wheat plant (TriticumaestivumL.): Trichodermaharzianum, T. viride, T. longibrachiatum, Rhizoctoniasolani, Alternariaalternata, Fusariumsolani, Fusariumoxysporum and Aspergillusniger. I t was shown that all isolated fungi had the capacity to produce cellulase in solid medium (CMC- Agar), while the fungus T.viride gave the highest capability for the production of this enzyme(5.16). The fungus Rhizoctoniasolani gave less productive ratio (2.61). Quantitative test using Mandelium liquid medium showed that the fungus T.viride had the highest productivity of Cellulase(4.39 U/mL), and this fungus had greater biomass (8.96 g/L). The fungus Rhizoctoniasolani gave lower enzyme productivity(2.04 U/mL) and its biomass reached(4.65 g/L). The study of different carbon sources for the fungus T.harzianum showed that Sucrose was the best media in Cellulase productivity. It reached (3.87U/mL), and the biomass was (2.83 g/L).
Alterations of the enamel after topical application of bleaching agents, presenting as major consequences are: ions release, increased superficial roughness, stronger bacterial attachment and hardness alteration.The aims of the study were to evalu ate the effect of the bleaching agent (35%hydrogen peroxide) for vital teeth by using light source on the release of ions from the enamel surface. our sample consisted of 30 sound enamel surface for control group,30 sound enamel surface for(35%hydrogen peroxide), and then application of light radiation to activate the bleaching agent. Ion Chromatography were used to measure the ions release .
The research project sample consisted of 80 extracted central incisors obtained from the Oral and Maxillofacial Surgery Department as well as from private practices. These teeth were divided into two equal groups. The bonding agent ClearFil SE Bond w as used in one group, whereas the OptiBond Solo Plus bonding agent was used in the other group. Each group was divided into four subgroups: (1) veneers performed without any bleaching, (2) veneers performed two weeks before bleaching, (3) veneers performed immediately following bleaching and (4) veneers performed two weeks after bleaching. veneers were made using a special template which allowed producing the same size of all the specimens used in this project. These veneers were placed on the vestibular surfaces of enamel of the extracted central incisors. The aim of the previous procedures was to study the effect of home teeth bleaching . Teeth were embedded in acrylic blocks created in metallic cylinders. The bonding strength was measured through . The results showed that there was a significant difference between the control subgroup and the second subgroup .
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا