scholarly journals Differentiation between wild and artificial cultivated Stephaniae tetrandrae radix using chromatographic and flow‐injection mass spectrometric fingerprints with the aid of principal component analysis

2020 ◽  
Vol 8 (8) ◽  
pp. 4223-4231
Author(s):  
Ya‐dong Qin ◽  
Feng‐man Fang ◽  
Rong‐bin Wang ◽  
Juan‐juan Zhou ◽  
Lin‐hua Li
Keyword(s):  
Principal Component Analysis ◽  
Flow Injection ◽  
Principal Component ◽  
Component Analysis ◽  
Mass Spectrometric

Evaluation of mass spectrometric data using principal component analysis for determination of the effects of organic lakes on protein binder identification

2015 ◽  
Vol 50 (11) ◽  
pp. 1270-1278 ◽  
Author(s):  
Stepanka Hrdlickova Kuckova ◽  
Gabriela Rambouskova ◽  
Radovan Hynek ◽  
Pavel Cejnar ◽  
Doris Oltrogge ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Mass Spectrometric ◽  
Mass Spectrometric Data ◽  
Spectrometric Data

scholarly journals Distinguishing Smilax glabra and Smilax china rhizomes by flow-injection mass spectrometry combined with principal component analysis

2018 ◽  
Vol 68 (1) ◽  
pp. 87-96
Author(s):  
Jian Liang ◽  
Meng Zhou ◽  
Lin-Yu Li ◽  
Ji-Cheng Shu ◽  
Yong-Hong Liang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Principal Component Analysis ◽  
Discriminant Analysis ◽  
Least Squares ◽  
Partial Least Squares ◽  
Flow Injection ◽  
Principal Component ◽  
Component Analysis ◽  
Chemometric Method ◽  
Predictive Study

Abstract Flow-injection mass spectrometry (FIMS) coupled with a chemometric method is proposed in this study to profile and distinguish between rhizomes of Smilax glabra (S. glabra) and Smilax china (S. china). The proposed method employed an electrospray-time-of-flight MS. The MS fingerprints were analyzed using principal component analysis (PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA) with the aid of SIMCA software. Findings showed that the two kinds of samples perfectly fell into their own classes. Further predictive study showed desirable predictability and the tested samples were successfully and reliably identified. The study demonstrated that the proposed method could serve as a powerful tool for distinguishing between S. glabra and S. china.

Preference of banana flavour and aroma are not affected by time of the year or 'winter' chilling

2002 ◽  
Vol 42 (2) ◽  
pp. 201 ◽  
Author(s):  
A. Klieber ◽  
M. N. Muchui
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Musa Acuminata ◽  
Mass Spectrometric ◽  
Soluble Solids ◽  
Eating Quality ◽  
Sensory Testing ◽  
Mass Spectrometric Data ◽  
Spectrometric Data

Banana (Musa acuminata Coll. Cavendish cv. Williams) eating quality was assessed through winter, spring and summer, and for mildly chilled bananas with symptoms mimicking that of ‘winter-chilled’ fruit using sensory testing and principal component analysis of mass-spectrometric data obtained from a ‘chemical nose’. Sensory testing of bananas harvested at different times of the year showed no differences in flavour preference, even though soluble solids were higher in spring at 23.6%, compared with winter at 22.6% and summer at 21.9%. Principal component analysis of mass-spectrometric data did not reveal aroma differences between times of the year. Results of difference tests for mildly chilled and non-chilled bananas indicated no differences in aroma intensity or sweetness. Mild chilling did not alter soluble solids and principal component analysis of mass-spectrometric data did not discriminate between chilled and non-chilled bananas.

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.

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