The Sourdough School

Baking eating and sharing bread to improve physical and mental health

Using a robust evidence-based baking protocol combining the evidence of thousands of years of baking with modern clinical insights, we offer comprehensive training to bakers and healthcare professionals, providing students with the tools to use baking in everyday practice as a wellness intervention.
Follow on Instagram

Soil Association
Our gardens are certified organic.

Baking as Lifestyle Medicine for Bakers and Clinicians

+44(0)7707 480336
[email protected]
Follow on Instagram
  • Facebook
  • Instagram
  • Pinterest
  • Twitter

Student Login

Navigation
  • Home
    • Login
  • About us
    • The School
    • Contact Us & FAQ
    • The Team
    • Contributors & Guest Tutors
    • General FAQ’s about The School
    • Be the Change
  • Admissions
    • Courses
    • Course Q&A’s
    • Graduation Week in Tuscany
    • Educational Awards Programme
    • Enrolment
    • Reviews
    • Student Welfare
    • Policies & Compliance
  • The Certificate
    • The Certificate
    • Teaching
    • Teacher Training
  • The Diploma
    • The Diploma
    • Licence to Prescribe BALM
  • BALM
    • Baking as Lifestyle Medicine
    • What is BALM?
    • BALM & Bread in The Blue Zone
    • Case Studies Library
    • BALM Podcasts
  • Shop
    • Books
    • Equipment
    • Ingredients

159 - ‘Influence of Jam Processing on the Radical Scavenging Activity and Phenolic Content in Berries’. J. Agric. Food Chem. 48, 6292?6297

Reference Number: 159

Year: 2000

Authors: Yoshiaki Amakura,* Yukiko Umino, Sumiko Tsuji, and Yasuhide Tonogai

Link: Link to original paper

Nutrition: Polyphenols

Inclusions: Berries

Summary

Summary

Six selected phenolic aglycons (caffeic and ellagic acids, kaempferol, quercetin, myricetin, and morin) in nine types of berries, and their changes as influenced by jam processing, have been evaluated using optimized HPLC with diode-array detection. The berry samples, fresh and after jam processing, were analyzed, and the total amounts of selected phenolics as aglycons were identified and determined by acid hydrolysis. Their contents in fresh and jam samples did not indicate appreciable changes; therefore, the influence of jam processing on these selected phenolics in berries was suggested to be small, and was mostly present in berries as several conjugated forms that were glycosylated, esterified, etc., in the samples. The total phenolic content of each sample was also determined by the Folin-Ciocalteu method. The three samples of each berry, namely fresh, jam, and acid hydrolysate of the berry, had similar total phenolic contents. On the other hand, the scavenging effect on the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical was measured, and acid hydrolysates showed stronger activity than that of the fresh and jam-processed samples for all of the berry types.

 

SIGNIFICANCE OF THIS STUDY

The current paper looked at the fluctuations of six selected phenolics and the total phenolic amounts in fresh berries and in jam as processed berries. The study showed that flavonoids and phenolic acids widely distributed as conjugated forms in berries, for the most part, retained their conjugated forms during jam processing. Fluctuation in the selected phenolic contents due to jam processing was slight and hence, it was suggested that they might be present as the conjugated forms in jam. Although levels of anthocyanins are significantly lost during the processing of berries into jam, there is still hope that some other phenolic groups are still retained during jam making. The total phenolic content between fresh and processed berries can also significantly vary based on the type of berry.

Click for more information on our Nutrition & Digestibility of Bread

Qualify in Baking as Lifestyle Medicine

All reasonable care is taken when writing about health aspects of bread, but the information it contains is not intended to take the place of treatment by a qualified medical practitioner. You must seek professional advice if you are in any doubt about any medical condition. Any application of the ideas and information contained on this website is at the reader's sole discretion and risk.

  • Facebook
  • Instagram
  • Pinterest
  • Twitter

Email Sign Up

Terms and Conditions | Privacy Policy
Copyright © 2023 Vanessa Kimbell
Call +44 (0)1604 881274 | Email [email protected]
Registered in England & Wales: 08412236
Website by Callia Web