scholarly journals Study on the Detachment of Fluorescent Whitening Agents from White Waster Papers

2016 ◽  
Vol 48 (2) ◽  
pp. 5-12
Author(s):  
Ji Young Lee ◽  
Chul Hwan Kim ◽  
Eun Hea Kim ◽  
Tae Ung Park
Keyword(s):  
Fluorescent Whitening Agents

Accumulation and elimination studies of four detergent fluorescent whitening agents in bluegill (

1973 ◽  
Vol 7 (10) ◽  
pp. 981-0
Author(s):  
C. R. Ganz ◽  
Janos Schulze ◽  
P. S. Stensby ◽  
F. L. Lyman ◽  
Kenneth Macek
Keyword(s):  
Fluorescent Whitening Agents

The use of chemical and molecular microbial indicators for faecal source identification

2003 ◽  
Vol 47 (3) ◽  
pp. 39-43 ◽  
Author(s):  
B. Gilpin ◽  
T. James ◽  
F. Nourozi ◽  
D. Saunders ◽  
P. Scholes ◽  
...  
Keyword(s):  
Direct Pcr ◽  
Animal Group ◽  
Faecal Pollution ◽  
Molecular Assays ◽  
Chemical Indicators ◽  
Fluorescent Whitening Agents ◽  
Feral Animals ◽  
Oxidation Ponds ◽  
Specific Species ◽  
Faecal Sterols

Identifying the source of faecal pollution is important to enable appropriate management of faecal pollution of water. We are developing and evaluating a combination of these microbial and chemical indicators better able to identify the source of faecal pollution. These assays make use of a combination of direct PCR, culturing, and colony hybridisation to identify source specific species of Bifidobacterium, Rhodococcus and Bacteroides. In conjunction with assays for (a) fluorescent whitening agents and (b) faecal sterols and stanols, these indicators were able to identify human derived faecal pollution in river water containing inputs from septic tanks, municipal oxidation ponds, farmed animals and feral animals. Differentiating amongst the animal sources was more difficult and will require development of molecular assays for organisms specific to each animal group.

Variety of photoluminescence intensity of fluorescent whitening agents introduced into polyacrylonitrile nanofibers

2006 ◽  
Vol 103 (4) ◽  
pp. 2382-2386 ◽  
Author(s):  
Shugang Wang ◽  
Qingbiao Yang ◽  
Jianshi Du ◽  
Jie Bai ◽  
Yaoxian Li
Keyword(s):  
Photoluminescence Intensity ◽  
Fluorescent Whitening Agents

scholarly journals Stabilisation of Natural Colourants and Lignocellulosic Textiles

2021 ◽  
Author(s):  
◽  
Ying Tang
Keyword(s):  
Reactive Oxygen Species ◽  
Aqueous Solution ◽  
Textile Fibre ◽  
Oxygen Species ◽  
Blue Fluorescence ◽  
Esi Ms ◽  
Naturally Occurring ◽  
Antifungal Effects ◽  
Fluorescent Whitening Agents ◽  
Cyclobutane Ring

<p>The lignocellulosic fibres extracted from the leaves of New Zealand flax, Phormium tenax, have been used as the principal textile fibre by Maori since pre- European times. Variations of antifungal activity were observed in Phormium fibres of different cultivars. The most resistant cultivars of P. tenax in an aqueous antifungal assay also possessed the greatest variety of naturally-occurring 7-hydroxycoumarins as identified by mass spectroscopy, ESI-MS. In addition to antifungal effects, coumarins function as fluorescent whitening agents in Phormium fibres and play a role in the fibre’s photodegradation. Ultraviolet irradiation (350 – 400 nm) of the fibre resulted in a substantial loss of the blue fluorescence originating from a number of 7-hydroxycoumarins present, together with the formation of new fluorophores absorbing and emitting at longer wavelengths, which contribute to the photoyellowing of the fibre. The photolysis of two standard 7-hydroxycoumarins in aqueous solution was examined and two primary photoproducts were elucidated by ESI-MS: a photodimer containing a linking cyclobutane ring and a monomeric photooxidation product. The formation of at least some of the photoproducts is associated with the coumarin-sensitised generation of reactive oxygen species, hydrogen peroxide and superoxide. The fluorescence properties and photodegradation of Chinese handmade papers were also investigated. Papers manufactured by traditional methods were found to be more photostable than that produced from chemically-facilitated techniques.</p>

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