Results 21 to 30 of about 45,622 (323)

Method for arbitrary phase transformation by a slab based on transformation optics and the principle of equal optical path [PDF]

open access: yes, 2012
The optical path lengths travelled by rays across a wavefront essentially determine the resulting phase front irrespective of the shape of a medium according to the principle of equal optical path.
Fan, Dianyuan   +4 more
core   +3 more sources

Discrimination of white ginseng origins using multivariate statistical analysis of data sets

open access: yesJournal of Ginseng Research, 2014
Background: White ginseng (Panax ginseng Meyer) is commonly distributed as a health food in food markets. However, there is no practical method for distinguishing Korean white ginseng (KWG) from Chinese white ginseng (CWG), except for relying on the ...
Hyuk-Hwan Song   +6 more
doaj   +1 more source

Diagnosis of Ia–Ic stages of serous high-grade ovarian cancerby the lipid profile of blood serum

open access: yesГинекология, 2021
Background. Ovarian cancer is the first fatal malignancy of the female reproductive system. Early detection is associated with better outcomes, but is significantly difficult because of asymptomatic or low-symptomatic course. Aim.
Mariia V. Iurova   +7 more
doaj   +1 more source

Gene polymorphisms and motor levodopa‐induced complications in Parkinson's disease

open access: yesBrain and Behavior, 2020
Objective The aim of the study was to evaluate the association of individual and combined single‐nucleotide polymorphisms in brain‐derived neurotrophic factor (BDNF), dopamine transporter (DAT), and catechol‐O‐methyltransferase (COMT) genes with the ...
Małgorzata Michałowska   +7 more
doaj   +1 more source

محاسبات مکانیک مولکولی و بررسی تأثیر حلال بر اثرات محیطی و ترمودینامیکی آنزیم کولین استیل ترانسفراز [PDF]

open access: yesمجله دانشگاه علوم پزشکی سبزوار, 1970
چکیده زمینه و هدف: فعالیت استیل کولین و آنزیم استیل کولین ترانسفراز در بیماری آلزایمر بررسی و مشخص شده است. از این جهت، نقص آنها می‌تواند باعث کاهش حافظه و یادگیری شود. میدان‌های نیرو، بر ساختار کولین استیل ترانسفراز تأثیر دارند.
ریحانه صباغزاده
doaj  

Metabolomics-based biomarker discovery for bee health monitoring : a proof of concept study concerning nutritional stress in Bombus terrestris [PDF]

open access: yes, 2019
Bee pollinators are exposed to multiple natural and anthropogenic stressors. Understanding the effects of a single stressor in the complex environmental context of antagonistic/synergistic interactions is critical to pollinator monitoring and may serve ...
Meeus, Ivan   +5 more
core   +2 more sources

The 1H NMR serum metabolomics response to a two meal challenge: a cross-over dietary intervention study in healthy human volunteers

open access: yesNutrition Journal, 2019
Background Metabolomics represents a powerful tool for exploring modulation of the human metabolome in response to food intake. However, the choice of multivariate statistical approach is not always evident, especially for complex experimental designs ...
Millie Rådjursöga   +7 more
doaj   +1 more source

Kernel Multivariate Analysis Framework for Supervised Subspace Learning: A Tutorial on Linear and Kernel Multivariate Methods

open access: yes, 2013
Feature extraction and dimensionality reduction are important tasks in many fields of science dealing with signal processing and analysis. The relevance of these techniques is increasing as current sensory devices are developed with ever higher ...
Arenas-García, Jerónimo   +3 more
core   +1 more source

Modelling molecule-surface interactions-an automated quantum-classical approach using a genetic algorithm [PDF]

open access: yes, 2011
We present an automated and efficient method to develop force fields for molecule-surface interactions. A genetic algorithm (GA) is used to parameterise a classical force field so that the classical adsorption energy landscape of a molecule on a surface ...
Bandura   +35 more
core   +1 more source

Application of FT-IR spectroscopy and chemometric technique for the identification of three different parts of Camellia nitidissima and discrimination of its authenticated product

open access: yesFrontiers in Pharmacology, 2022
Camellia nitidissima C.W. Chi is a golden camellia recognized in Chinese herbology and widely used as tea and essential oil in Chinese communities. Due to its diverse pharmacological properties, it can be used to treat various diseases.
Wan Yin Tew   +9 more
doaj   +1 more source

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