Optimization of the subcritical water extraction of phenolic antioxidants from Crocus sativus petals of saffron industry residues: Box-Behnken design and principal component analysis

2016 ◽  
Vol 36 ◽  
pp. 234-244 ◽  
Author(s):  
Zahra Ahmadian-Kouchaksaraie ◽  
Razieh Niazmand ◽  
Masoud Najaf Najafi
Keyword(s):  
Principal Component Analysis ◽  
Subcritical Water ◽  
Principal Component ◽  
Component Analysis ◽  
Water Extraction ◽  
Crocus Sativus ◽  
Phenolic Antioxidants ◽  
Subcritical Water Extraction ◽  
Box Behnken Design

Optimization of subcritical water extraction of phenolic antioxidants from pomegranate (Punica granatum L.) peel by response surface methodology

2017 ◽  
Vol 9 (32) ◽  
pp. 4647-4656 ◽  
Author(s):  
Linlin Yan ◽  
Yungang Cao ◽  
Guangyao Zheng
Keyword(s):  
Response Surface Methodology ◽  
Subcritical Water ◽  
Punica Granatum ◽  
Water Extraction ◽  
Phenolic Antioxidants ◽  
Subcritical Water Extraction ◽  
Extraction Technology ◽  
Pomegranate Peel ◽  
Efficient Extraction ◽  
Punica Granatum L

Subcritical water extraction (SWE), a ‘green’ and efficient extraction technology, was applied to extract phenolic antioxidants from pomegranate peel in this study.

Fractionation of Eremurus spectabilis fructans by ethanol: Box–Behnken design and principal component analysis

2014 ◽  
Vol 106 ◽  
pp. 374-383 ◽  
Author(s):  
Amir Pourfarzad ◽  
Mohammad B. Habibi Najafi ◽  
Mohammad H. Haddad Khodaparast ◽  
Mohammad Hassanzadeh Khayyat ◽  
Akbar Malekpour
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Box Behnken Design

Recovery of phenolic antioxidants from green kiwifruit peel using subcritical water extraction

2020 ◽  
Vol 122 ◽  
pp. 136-144 ◽  
Author(s):  
Francesca Guthrie ◽  
Yiting Wang ◽  
Natasha Neeve ◽  
Siew Young Quek ◽  
Khosrow Mohammadi ◽  
...  
Keyword(s):  
Subcritical Water ◽  
Water Extraction ◽  
Phenolic Antioxidants ◽  
Subcritical Water Extraction ◽  
Green Kiwifruit

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽  
2012 ◽  
Vol 41 (5) ◽  
pp. 333-342 ◽  
Author(s):  
Kirchberger ◽  
Finger ◽  
Müller-Bühl
Keyword(s):  
Principal Component Analysis ◽  
Intermittent Claudication ◽  
Completion Time ◽  
Short Form ◽  
Principal Component ◽  
Component Analysis ◽  
German Version ◽  
Average Completion Time ◽  
Sf 36 ◽  
Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbach’s alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbach’s alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

Sign in / Sign up

Export Citation Format

Share Document