نتایج جستجو برای: hierarchical cluster analysis hca

تعداد نتایج: 2989843  

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2011
Nengsheng Ye Liqin Zhang Xuexin Gu

A micellar electrokinetic chromatography (MEKC) method was applied for the identification of geographical origins of Chinese green teas. Under the optimized conditions, chromatographic profiling of collected Maojian tea samples was obtained. Based on MEKC-UV profiling, twenty-four tea samples were successfully differentiated according to the relative peak areas of selected peaks in the chromato...

Journal: :Natural Volatiles and Essential Oils 2021

The genus Goniothalamus is belonging to the Annonaceae family, consists of ca. 2500 species and found in tropical Southeast Asia. essential oils were recognized possess considerable biological activities with varied chemical composition. This article aims overview medicinal uses, compositions, Malaysian considered as a plants, widely used traditional herbal medicines treatment various diseases....

Journal: : 2022

Helichrysum italicum (Roth.) G. Don is an aromatic perennial shrub widespread across the Mediterranean Basin. Plants from this species show a high degree of morphological variability. This research examines variation inside H. population growing in natural conditions and correlation between observed traits. Morphometric characteristics synflorescence were measured on plants wild northwestern co...

2014
Ntakadzeni E Madala Lizelle A Piater Paul A Steenkamp Ian A Dubery

Isonitrosoacetophenone (INAP, 2-keto-2-phenyl-acetaldoxime) is a novel inducer of plant defense. Oxime functional groups are rare in natural products, but can serve as substrates depending on existing secondary pathways. Changes in the metabolomes of sorghum and tobacco cells treated with INAP were investigated and chemometric tools and multivariate statistical analysis were used to investigate...

Journal: :Investigative ophthalmology & visual science 2015
L Goodwin Burgess Karan Uppal Douglas I Walker Rachel M Roberson ViLinh Tran Megan B Parks Emily A Wade Alexandra T May Allison C Umfress Kelli L Jarrell Brooklyn O C Stanley John Kuchtey Rachel W Kuchtey Dean P Jones Milam A Brantley

PURPOSE To determine if primary open-angle glaucoma (POAG) patients can be differentiated from controls based on metabolic characteristics. METHODS We used ultra-high resolution mass spectrometry with C18 liquid chromatography for metabolomic analysis on frozen plasma samples from 72 POAG patients and 72 controls. Metabolome-wide Spearman correlation was performed to select differentially exp...

Journal: :Expert Syst. Appl. 2005
Mevlut Ture Imran Kurt A. Turhan Kurum Kazim Ozdamar

Hypertension is a leading cause of heart disease and stroke. In this study, performance of classification techniques is compared in order to predict the risk of essential hypertension disease. A retrospective analysis was performed in 694 subjects (452 patients and 242 controls). We compared performances of three decision trees, four statistical algorithms, and two neural networks. Predictor va...

Journal: :Applied sciences 2022

Thirty groundwater samples were taken from Assiut’s northern outskirts. The physicochemical properties of these investigated. For the evaluation water–rock interaction, saturation index (SI), chloro-alkaline indices (CAI1 and CAI2), Gibbs ratios for cations anions (GC GA), principal component analysis (PCA), hierarchical cluster (HCA) used. (1) With exception five that supersaturated, rest unde...

Journal: :Journal of Internet Computing and Services 2014

Journal: :IEEE Trans. on CAD of Integrated Circuits and Systems 2002
Biplab K. Sikdar Niloy Ganguly Parimal Pal Chaudhuri

This paper introduces the concept of hierarchical cellular automata (HCA). The theory of HCA is developed over the Galois extension field (2 ), where each cell of the CA can store and process a symbol in the extension field (2 ). The hierarchical field structure of (2 ) is employed for design of an HCA-based test pattern generator (HCATPG). The HCATPG is ideally suited for testing very large sc...

Journal: :Molecules 2015
Yaping Wang Linfang Huang

Notopterygii Rhizoma et Radix (Qianghuo), including Notopterygium incisum Ting ex H. T. Chang (NI) and Notopterygium franchetii H. de Boiss (NF), is an important traditional Chinese medicine. Of these two plants, NI, is more commonly used and has a much higher price in the marketplace. To compare these two plants, a combination of gas chromatography-mass spectrometry (GC-MS) and high performanc...

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