Navigation Links
Silkworms spin colored silks while on a 'green' dyed-leaf diet
Date:12/4/2013

For some 5,000 years, cultivated silkworms have been spinning luxurious white silk fibers destined for use in the finest clothing. But current dyeing practices produce wastewater that contains potentially harmful toxins, so scientists are turning to a new, "greener" dyeing method in which they coax already-colored fibers from the caterpillars by feeding them dyed leaves. Their findings are published in the journal ACS Sustainable Chemistry & Engineering.

Anuya Nisal, Kanika Trivedy and colleagues point out that dyeing textile fabrics is one of today's most polluting industries. The process requires huge quantities of water for bleaching, washing and rinsing, and it results in a stream of harmful wastewater that needs to be treated effectively before release into the environment. To make the industry greener and more environmentally friendly, researchers have been developing less toxic methods, including feeding dyed leaves to silkworms so they spin colored rather than white cocoons. But so far, this technique has only been tested with one type of dye, which is too pricey for large-scale production. Thus, the team turned to azo dyes, which are inexpensive and account for more than half of the textile dyes used today.

They dipped or sprayed mulberry leaves, the silkworm's food of choice, with azo dyes to see which ones, when consumed, would transfer to the silk. Of the seven dyes they tested, three were incorporated into the caterpillars' silk, and none seemed to affect the worms' growth. The scientists noticed that certain dye traits, such as the ability to dissolve in water, affected how well the dye worked. "These insights are extremely important in development of novel dye molecules that can be successfully used in this green method of producing colored silk fabrics," they conclude.


'/>"/>

Contact: Michael Bernstein
m_bernstein@acs.org
202-872-6042
American Chemical Society
Source:Eurekalert

Page: 1

Related biology news :

1. New beautifully colored long-horned beetle from Yunnan, China
2. Biologists produce rainbow-colored algae
3. Eating bright-colored fruits and vegetables may prevent or delay ALS
4. Dance of water molecules turns fire-colored beetles into antifreeze artists
5. The music of the silks
6. Harlequin ladybirds escape enemies while native species succumb
7. EU fishing fleets reap profits while taxpayers foot the bill
8. New technique controls dimensions of gold nanorods while manufacturing on a large scale
9. New evidence that cancer cells change while moving throughout body
10. Advance in regenerative medicine could make reprogrammed cells safer while improving their function
11. Study finds physicians need to better recognize use of herbal supplements while breastfeeding
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/11/2017)... 11, 2017  Michael Johnson, co-founder of Visikol Inc. a company ... has been named to the elite "Forbes 30 Under 30" list ... 600 people in 20 fields nationwide to be recognized as a ... applicants were selected. ... He is currently a PhD candidate at Rutgers University. ...
(Date:1/6/2017)... 5, 2017  Delta ID Inc., a leader in ... for automotive at CES® 2017. Delta ID has collaborated ... demonstrate the use of iris scanning as a secure, ... driver in a car, and as a way to ... Delta ID and Gentex will demonstrate (booth ...
(Date:1/3/2017)... 2017 Onitor, provider of digital health technology ... an innovative biometric data-driven program designed to aid weight ... the 2017 Consumer Electronics Show (CES) in ... U.S., the World Health Organization (WHO), have identified lifestyle ... who are overweight or obese. WHO also states that ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... ... January 19, 2017 , ... ... the full spectrum of drug and device development, and Prism Clinical Research ... and clinicians, today announced Verified Clinical Trials (VCT) has been selected ...
(Date:1/19/2017)... BETHESDA, Md. , Jan. 18, 2017  Northwest ... company developing DCVax® personalized immune therapies for operable and ... Marnix Bosch , Chief Technical Officer of NW Bio, ... Thursday, January 19, 2017, at the Hyatt Regency Hotel ... Dr. Bosch will chair the session entitled "New Therapeutic ...
(Date:1/19/2017)... Jan. 18, 2017 BD (Becton, Dickinson and Company) (NYSE: ... that it will host a live webcast of its Annual Meeting ... The webcast can be accessed from the BD ... through Tuesday, January 31, 2017. ... About BD BD is a global medical ...
(Date:1/18/2017)... According to a new market research report "In situ Hybridization Market by Technique ... Diagnostic Laboratories, Academic and Research Institutions) - Global Forecast to 2021" published by ... USD 557.1 Million in 2016, growing at a CAGR of 5.8%. ... ... MarketsandMarkets Logo ...
Breaking Biology Technology: