scholarly journals Environmentally-safe and transparent superhydrophobic coatings

2016 ◽  
Vol 18 (7) ◽  
pp. 2185-2192 ◽  
Author(s):  
J. E. Mates ◽  
R. Ibrahim ◽  
A. Vera ◽  
S. Guggenheim ◽  
J. Qin ◽  
...  

An environmentally-safe, water-borne coating consisting of titania nanoparticles and fluorine-free polyethylene copolymers, forming a transparent, substrate-independent, superhydrophobic water barrier.

Author(s):  
A.L. Lukin ◽  
◽  
O.B. Maraeva ◽  
V.A. Kuznetsov ◽  
V.F. Selemenev ◽  
...  

2017 ◽  
Vol 5 (38) ◽  
pp. 20277-20288 ◽  
Author(s):  
Yong Li ◽  
Zhaozhu Zhang ◽  
Mengke Wang ◽  
Xuehu Men ◽  
Qunji Xue

Repairable and antifouling coatings were prepared via self-assembly method without destroying the intrinsic properties of substrates, which aims to tackle low transparency and poor durability problems of current coatings.


RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 53949-53954 ◽  
Author(s):  
Qingqing Rao ◽  
Kunlin Chen ◽  
Chaoxia Wang

A self-healing waterborne superhydrophobic coating comprising polysiloxane latex, microcapsules, fluorinated silica and photocatalytic titania nanoparticles shows self-repairing ability after mechanical damage or oily contaminations.


2015 ◽  
Vol 5 (2) ◽  
pp. 271-278 ◽  
Author(s):  
Daniel M. Nzengya

Recent research indicates that investments in infrastructure for safe water and sanitation provision do not significantly reduce the incidence of water-borne diseases in the developing world unless they are accompanied by education in water handling and hygiene practices. School-based hygiene education initiatives are popular, but there is little evidence that they are effective in teaching students about safe water-handling practices. This study compared the outcomes of two approaches to teaching schoolchildren about the links between hygiene, water handling, and water-borne diarrhea. One approach combined messages about safe water handling and hygiene practices with water testing; the other used messages alone. A quasi-experimental design was used with 120 middle-school students. Forty students received messages alone, 40 received messages and tested water quality, and 40 served as a control group. An evaluation 1 week after the interventions measured students’ hygiene knowledge. Results showed significant improvement in knowledge among students who received messages and tested water, compared to their counterparts who received intervention through hygiene messages only. Evaluation after 12 months showed that the hygiene knowledge gained in both groups was retained. Including participatory water testing in hygiene education interventions can improve students’ knowledge about safe water handling and hygiene practices.


2020 ◽  
Vol 2 (1) ◽  
pp. 149-161
Author(s):  
Kishor Kumar Shrestha

 Obviously, water management is challenging issue in developing world. Dwellers of Pokhara use water from government supply along with deep borings and other sources as well. Nowadays, people are also showing tendency towards more use of processed water. In spite of its importance, quality analysis of water has been less emphasized by concerned sectors in our cities including Pokhara. The study aimed for qualitative analysis of water in the city with focus on microbiological aspects. For this purpose, results of laboratory examination of water samples from major sources of government supply, deep borings, hospitals, academic institutions as well as key water bodies situated in Pokhara were analyzed. Since water borne diseases are considered quite common in the area, presence of coliform bacteria was considered for the study to assess the question on availability of safe water. The result showed that all the samples during wet seasons of major water sources of water in Pokhara were contaminated by coliform bacteria. Likewise, in all 20 locations of Seti River, the coliform bacteria were recorded. Similar results with biological contamination in all samples were observed after laboratory examination of more than 60 locations of all three lakes: Phewa Lake, Begnas Lake and Rupa Lake in Pokhara. The presence of such bacteria in most of the water samples of main sources during wet seasons revealed the possibilities of spreading water related diseases. Again, microbiological contamination observed from significant number of bottled water samples as well as boring sources clearly alarmed the preoccupied belief in such supply of water. On the other hand, fluctuating water quality of academic institutions and hospitals questioned on the priority of the management and seriousness against possible spreading of water borne diseases. For obtaining the safe water, various treatment options have been recommended from World Health Organization (WHO) with chlorination in top priority due to affordability and simplicity. Urgent execution of such option could be important with due consideration of negative aspects from the possible byproducts. However, proper implementation of filtration technique and planning of further advanced technology could be valuable for fulfilling the need of metropolitan dwellers to get wholesome water for their daily consumption.


Author(s):  
Inna Trus ◽  
◽  
Vita Halysh ◽  
Alina Nikolaichuk ◽  
Mukola Gomelya ◽  
...  

2018 ◽  
Vol 7 (2) ◽  
pp. 58-63
Author(s):  
Durga Devi Chaulagain ◽  
Kamal Prasad Parajuli

Background: Clean and safe water is one of the basic needs of human beings. Inaccessibility to this and poor sanitation leads to various water borne diseases, gastro enteropathy and under nutrition. In Nepal, only 39% of total population have access to improved sanitation and 38.4% of people defecate in open airs. So the objective of this study was to assess the level of knowledgeand practices regarding safe drinking water and sanitation among women. Materials and methods: A descript cross-sectional research design was adopted for the study. A convenient sampling technique was used for sample collection. A self-designed structured questionnaire along with face to face interview was to evaluate the knowledge. Data were analysed by using descriptive as well as inferential statistics to find out association betweenlevels of knowledge of safe drinking water. Result: The findings showed that among 75 participants, 44% had adequate knowledge, 45.3% had moderate knowledge and 10.7% had inadequate knowledge regarding safe water and sanitation. In this study most ofthe respondents,ie 45.3% had moderate knowledge. Conclusion: The research findings concluded that most of the participants had moderate knowledge about safe drinkingwater and sanitation. Thus, the author feels community mass health education is required in this community to prevent water borne diseases.


2017 ◽  
Vol 24 (2) ◽  
pp. 416-424 ◽  
Author(s):  
Fei-Fei Chen ◽  
Zi-Yue Yang ◽  
Ying-Jie Zhu ◽  
Zhi-Chao Xiong ◽  
Li-Ying Dong ◽  
...  

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