Navigation Links
Explaining Stevia's bitter side
Date:5/31/2012

The human tongue has just one receptor type for detecting sweetness but about25 different ones for bitter flavors. Scientists at Technische Universitaet Muenchen (TUM) and the German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE) have now identified the two receptors, hTAS2R4 and hTAS2R14, that detect the bitter after taste of Stevia.

Extracts from the subtropical plants are up to 300 times sweeter than conventional sugar. They also contain almost no calories and are less harmful to teeth. Yet Stevia, or sweet leaf, as it is more commonly known, also has its disadvantages: At high concentrations, it elicits licorice-like aromas and a bitter after taste.

The scientists investigated nine Steviol glycosides responsible for the intensive sweet taste of Stevia plant extracts. They initially tested the bitterness or sweetness that each glycoside evokes in vitro, using cells that act as taste receptor cells and react to the glycoside molecules like an artificial tongue. The researchers were thus able to identify the receptors that are activated by Stevia.

They also tested the taste intensity of different concentrations of Stevia components with trained volunteers. The results of those sensory tests combined with the initial cell experiments revealed that the structure of glycoside molecules plays a key role in determining sweetness or bitterness in Stevia. "If a molecule has more glucose molecules attached to it, it is sweeter and less bitter," explains Prof. Thomas Hofmann, Chair of Food Chemistry and Molecular Sensory Science at TUM. The Steviol glycoside rebaudioside D, for example, comprises five glucose molecules and is around five times sweeter and two-thirds less bitter than dulcoside A, which has just two glucose molecules.

"Steviol glycosides activate two bitter receptors on the human tongue, and this elicits a bitter after taste in the mouth," confirms Anne Brockhoff at t
'/>"/>

Contact: Undine Ziller
ziller@zv.tum.de
49-816-171-5403
Technische Universitaet Muenchen
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Brochures explaining new health care law to patients available free in English and Spanish
2. Bitter sensitive children eat more vegetables with help of dip
3. Bitter Taste Receptors Found in Lungs May Aid Asthma Patients
4. Bitrex Bitter Safety Additive Exhibiting at the Safe Kids Fair 2010; Making a Bitter Face to Learn about Poisoning Prevention
5. Bitter Melon Extract May Slow, Stop Breast Cancer
6. Bitter melon extract decreased breast cancer cell growth
7. Bitter melon extract attacks breast cancer cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/22/2014)... Greenville, Sc (PRWEB) November 23, 2014 ... officially opened its doors in the downtown Greenville area. ... of Downtown Greenville , decided to open her own ... such amazing results with the patients. , AlignLife ... the proper tools. With a focus on chiropractic care ...
(Date:11/22/2014)... 2014 PrettyTailor , an outstanding ... new big promotion. Customers can buy new dresses at ... can visit its website. , As a matter of ... dresses. It mainly provides four types of wedding outfits, ... flower girl dresses. It also provides a variety of ...
(Date:11/22/2014)... (PRWEB) November 23, 2014 A classic black ... of the most famous dress suppliers, has unveiled its new ... new dresses are now offered at a big discount, up ... special offer. , The new black prom dresses, made ... order to meet the needs of all customers, the company ...
(Date:11/22/2014)... 2014 BambooFlooringChina.com is a famous ... proudly released its new collection of bamboo mats ; ... to 29% off. , According to the sales ... grass, making it a highly renewable resource. Their bamboo mats ... mixing color which comes from natural bamboo with caramel bamboo ...
(Date:11/22/2014)... New York, NY (PRWEB) November 22, 2014 ... Australia’s Therapeutics Goods Administration (TGA) approved it for ... Glutathione was approved and listed within the Therapeutic ... http://www.comlaw.gov.au/Details/F2014L01277 , Kyowa Hakko’s Setria® Glutathione ... Chem, a biotech specialist that sources and imports ...
Breaking Medicine News(10 mins):Health News:AlignLife of Downtown Greenville is Now Open and Accepting New Patients 2Health News:Customers Are Welcome to Shop at PrettyTailor.com 2Health News:New Black Prom Dresses from BellasDress.com 2Health News:Trendy Bamboo Mats Online Now By BambooFlooringChina.com 2Health News:Setria® Glutathione Now Available in Australia 2Health News:Setria® Glutathione Now Available in Australia 3
... Childhood cancer survivors diagnosed later with non-melanoma skin cancer ... tumor within 15 years, according to research led by ... percent of survivors in this Childhood Cancer Survivor Study ... skin cancer developed another more aggressive cancer within 15 ...
... June 2010 Elsevier, a world-leading healthcare and ... an agreement with Tarrytown, New York based InfoDesk ... for pharmaceutical and life science companies. The ... technological know-how paves the way for the development ...
... available in German . Early detection is ... every lump turns out to be a malignant tumor. To ... a biopsy and examine the removed tissue under the microscope. ... but also highly time consuming. Research scientists at the Fraunhofer ...
... 8, 2010) A University of Minnesota study definitively shows ... an increased life expectancy. The research is published in the ... The findings stem from the Program on Surgical Control ... at the University of Minnesota in 1975. Researchers evaluated 838 ...
... unique study with sunitinib suggest that it might be ... to treat HIV-positive cancer patients to achieve therapeutic benefit. ... treat their HIV, much more or considerably less chemotherapy ... NCI-supported AIDS Malignancy Consortium (AMC). The trial design ...
... 2010 The Institute for Research in Immunology and ... a new research funding model that brings together the ... accelerate the discovery of new anti-cancer therapeutics. Inspired by ... athletes at the Vancouver Winter Olympics, B2Discovery,s mission is ...
Cached Medicine News:Health News:Non-melanoma skin cancer may help identify survivors at increased risk for future cancers 2Health News:Elsevier and InfoDesk collaborate to co-develop federated drug pipeline intelligence solution 2Health News:Detecting tumors faster 2Health News:Consortium seeks best treatment for HIV-positive cancer patients 2Health News:Consortium seeks best treatment for HIV-positive cancer patients 3Health News:B2Discovery: Entrepreneurs and researchers join forces to conquer cancer 2
(Date:11/21/2014)... Calif. , Nov. 20, 2014  Edwards Lifesciences ... in the science of heart valves and hemodynamic monitoring, ... giving in 2014 to support a strong launch of ... Matters , and to improve the global communities where ... 2014, Edwards, global corporate giving will exceed $8 million, ...
(Date:11/21/2014)... , Nov. 20, 2014 /CNW Telbec/ - KLOX Technologies ... the following appointments: Todd Martensen ... the newly created role of Chief Commercial Officer, to ... using topical photoconverter gel for the treatment of chronic ... traumatic wounds, recently approved in Europe ...
(Date:11/21/2014)... Fla. , Nov. 20, 2014   Coqui ... become the first U.S. commercial producer of Molybdenum-99 (Mo-99), ... contract with INVAP to design its Medical ... Mo-99 is the parent isotope of Technetium-99, ... procedures worldwide. In 2012, Congress passed legislation making it ...
Breaking Medicine Technology:Edwards Lifesciences Increases Charitable Giving In 2014 To Support Launch Of Every Heartbeat Matters 2KLOX Technologies announces executive appointments 2KLOX Technologies announces executive appointments 3KLOX Technologies announces executive appointments 4Coqui RadioPharmaceuticals Inks Deal With INVAP 2
... 2010 United Seating & Mobility (USM) , one ... excited to announce today that it has finalized a transaction ... The transaction applies to Fridley, MN serving the greater ... and Appleton, WI; RehabTECH will continue to operate its Illinois ...
... Dec, 2, 2010 SRI International, an independent ... it is collaborating with PhenoMatriX (PMX), a biotechnology ... drugs such as cisplatin and related analogues are ... have served as major weapons against solid tumors ...
Cached Medicine Technology:SRI International and PhenoMatriX Collaborate to Develop Platin-Based Chemotherapies 2SRI International and PhenoMatriX Collaborate to Develop Platin-Based Chemotherapies 3SRI International and PhenoMatriX Collaborate to Develop Platin-Based Chemotherapies 4
... Activins are polypeptide hormones which belong ... superfamily. The TGF- superfamily is a ... which control many aspects of development, ... Other members incude TGF-s, bone morphogenetic ...
... also known as bone Gla protein, is ... is a major component of the noncollagenous ... osteoblasts in bone, with a small amount ... chondrocytes [1]. During bone formation, newly synthesized ...
... Insulin-like growth factor binding protein-2 (IGFBP-2) is ... have been proposed) which specifically bind and ... The binding affinity of IGFBP-2 for IGF-II ... for IGF-I [1], suggesting a role in ...
... suppress the secretion of FSH (follicle stimulating ... two distinct chains, or subunits (alpha and ... the alpha-subunit and betaA-subunit. Inhibin B consists ... dimeric forms of the molecule, containing both ...
Medicine Products: