scholarly journals Pretreatment of garlic powder using sweep frequency ultrasound and single frequency countercurrent ultrasound: Optimization and comparison for ACE inhibitory activities

2015 ◽  
Vol 23 ◽  
pp. 109-115 ◽  
Author(s):  
Haile Ma ◽  
Liurong Huang ◽  
Lei Peng ◽  
Zhenbin Wang ◽  
Qiaorong Yang
Keyword(s):  
Single Frequency ◽  
Sweep Frequency ◽  
Garlic Powder ◽  
Inhibitory Activities ◽  
Ace Inhibitory ◽  
Frequency Ultrasound

Antimicrobial and ACE Inhibitory Activities of Citrus unshiu Fermented with Lactic Acid Bacteria

2015 ◽  
Vol 44 (7) ◽  
pp. 1084-1089 ◽  
Author(s):  
So-Yeon Choi ◽  
Si-Kyung Kim ◽  
Un-Young Youn ◽  
Dae-Ook Kang ◽  
Nack-Shick Choi ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Citrus Unshiu ◽  
Inhibitory Activities ◽  
Ace Inhibitory

scholarly journals Antioxidant and angiotensin I-converting enzyme inhibitory activities of Xuanwei ham before and after cooking and in vitro simulated gastrointestinal digestion

2018 ◽  
Vol 5 (7) ◽  
pp. 180276 ◽  
Author(s):  
Le Wang ◽  
Xiang Li ◽  
Yingnan Li ◽  
Wenying Liu ◽  
Xiaoyun Jia ◽  
...  
Keyword(s):  
Inhibitory Activity ◽  
Scavenging Activity ◽  
Angiotensin I ◽  
Gastrointestinal Digestion ◽  
Ace Inhibitory Activity ◽  
Angiotensin I Converting Enzyme ◽  
Before And After ◽  
Inhibitory Activities ◽  
Ace Inhibitory ◽  
Significant Increment

Xuanwei ham is especially rich in a large amount of peptides and free amino acids under the action of protein degradation. Some of these peptides can potentially exert bioactivities of interest for human health. Traditionally, Xuanwei ham should undergo Chinese household cooking treatments before eating. However, it has not been known how its bioactivity changes after cooking and gastrointestinal digestion. Herein, Xuanwei ham is analysed before and after cooking, as well as gastrointestinal digestion being simulated so as to evaluate and compare its effect on antioxidant and angiotensin I-converting enzyme (ACE) inhibitory activities. The antioxidant activity is analysed using five different methods, and results demonstrate that cooking has some negative effects on antioxidative capacity when determined using different antioxidant methods except for a significant increment in 1,1'-diphenyl-2-picrylhydrazyl radical-scavenging activity, while ACE inhibitory activity increases significantly after cooking compared with control samples. After gastrointestinal digestion of samples, there is a significant increment of the antioxidant and ACE inhibitory activities in comparison with control and cooked samples. Particularly, after gastrointestinal digestion, free thiols content and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical-cation-scavenging activity of Xuanwei ham, respectively, increase about twice and fourfold, while ACE inhibitory activity increases about twice compared to cooked samples, reaching the value of 83.73%. Therefore, through cooking the antioxidant activity and ACE inhibitory activity of Xuanwei ham are not completely lost and a part of them is still maintained, while gastrointestinal digestion produces a significant enhancement in both bioactivities, highlighting a greater potential for a beneficial physiological effect on human health after eating it.

scholarly journals Bacterial Cell Inactivation Using a Single-Frequency Batch-Type Ultrasound Device

2021 ◽  
Vol 6 (1) ◽  
pp. 65-80
Author(s):  
Poetro Sambegoro ◽  
Maya Fitriyanti ◽  
Bentang Arief Budiman ◽  
Kamarisima Kamarisima ◽  
Sekar Wangi Arraudah Baliwangi ◽  
...  
Keyword(s):  
Bacterial Cell ◽  
Treatment Time ◽  
Low Cost ◽  
Single Frequency ◽  
Bacterial Cells ◽  
Cell Inactivation ◽  
E Coli ◽  
Commercial System ◽  
Ultrasound Device ◽  
Frequency Ultrasound

Ultrasound technology employs cavitation to generate high-pressure soundwaves to disrupt bacterial cells. This study reveals the effectiveness of a single frequency ultrasound device for bacterial cell inactivation. A low-cost ultrasound device having a single frequency, i.e. 22 kHz for lab-scale application, was developed first, and the prototype was mechanically designed and analyzed using the finite-element method to assure the targeted natural frequency could be achieved. The prototype was then tested inactivating bacterial cells, Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis), in a simple medium and a food system, and the results were then compared to a commercial system. A treatment time of up to 15 minutes was able to reduce E. coli and B. subtilis cells by 3.3 log and 2.8 log, respectively, and these results were similar to those of the commercial system. The effectiveness of bacterial cell inactivation using the developed single-frequency ultrasound device is then discussed. The findings are useful for designing low-cost ultrasound devices for application in the food industry.

Flavanones biotransformation of citrus by-products improves antioxidant and ACE inhibitory activities in vitro

2020 ◽  
Vol 38 ◽  
pp. 100787
Author(s):  
Amanda Roggia Ruviaro ◽  
Paula de Paula Menezes Barbosa ◽  
Isabela Mateus Martins ◽  
Amanda Rejane Alves de Ávila ◽  
Vânia Mayumi Nakajima ◽  
...  
Keyword(s):  
Inhibitory Activities ◽  
By Products ◽  
Ace Inhibitory

A comparative study of the antioxidant and ACE inhibitory activities of selected herbal extracts

2020 ◽  
Vol 22 ◽  
pp. 100343
Author(s):  
Neha Chaudhary ◽  
Latha Sabikhi ◽  
Shaik Abdul Hussain ◽  
Sathish Kumar M H
Keyword(s):  
Comparative Study ◽  
Herbal Extracts ◽  
Inhibitory Activities ◽  
Ace Inhibitory

Monitoring concept of single-frequency ultrasound and its application in dynamic crystallization processes

2015 ◽  
Vol 26 (3) ◽  
pp. 874-881 ◽  
Author(s):  
D. Pertig ◽  
M. Fardmostafavi ◽  
T. Stelzer ◽  
J. Ulrich
Keyword(s):  
Single Frequency ◽  
Dynamic Crystallization ◽  
Frequency Ultrasound

From Mechanical Objectivity to Instrumentalizing Theory: Inventing Radio Ionospheric Sounders

2012 ◽  
Vol 42 (3) ◽  
pp. 190-234 ◽  
Author(s):  
Chen-Pang Yeang
Keyword(s):  
Single Frequency ◽  
National Bureau ◽  
Control Mechanisms ◽  
Radio Waves ◽  
Sweep Frequency ◽  
Experimental Scheme ◽  
University Of Munich ◽  
The One ◽  
Instrumental Development ◽  
Mechanical Objectivity

While the discovery of the ionosphere through wireless communications technology in the mid-1920s had built a close connection between atmospheric science and radio, the full-fledged use of radio waves as a geophysical probe did not start until an instrumental development occurred a few years later. This article examines this advance, which centered on the invention of radio sounders of the ionosphere. Like the earlier radio experiments on the ionosphere, the sounders bounced radio waves off the upper atmosphere and inferred its properties from the returns. But the new apparatuses contained valuable innovations. In the 1930s, researchers at American Telephone and Telegraph Company (AT&T), Britain's Radio Research Board (RRB), the Technical University of Munich, and the U.S. National Bureau of Standards (NBS) automated data recording with oscilloscopic displays and inscription gadgets. They also devised control mechanisms to synchronize the acquisition of data with the change of transmitting signals. On the one hand, such automation was consistent with Lorraine Daston and Peter Galison's "mechanical objectivity," which minimizes human interference, makes experiments repeatable, and reduces personal equations, most notably perhaps with the Bureau of Standards' automatic single-frequency sounder. On the other hand, however, the automation also embodied mechanically theory-laden experimental procedures—it instrumentalized a theory that underlay the experimental scheme. The British and Americans' sweep-frequency recorder reckoned precisely the mandate of the magneto-ionic theory, the dominant model of radio-wave propagation. The sweep-frequency recorder incorporated the magneto-ionic theory by producing an easy-to-measure critical condition that the theory had predicted.

Sign in / Sign up

Export Citation Format

Share Document