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Danuta Szumińska, Małgorzata Szopińska, Sara Lehmann-Konera, Łukasz Franczak, Waldemar Kociuba, Stanisław Chmiel, Paweł Kalinowski, Żaneta Polkowska
Climate changes observed in the Arctic (e.g. permafrost degradation, glacier retreat) may have significant influence on sensitive polar wetlands. The main objectives of this paper are defining chemical features of water within six small arctic lakes located in Bellsund (Svalbard) in the area of continuous permafrost occurrence. The unique environmental conditions of the study area offer an opportunity to observe phenomena influencing water chemistry, such as: chemical weathering, permafrost thawing, marine aerosols, atmospheric deposition and biological inputs...
October 17, 2017: Science of the Total Environment
Amanda H Costello, Natalie J Shook, Nancy M Wallace, Cheryl B McNeil
Child maltreatment remains a serious public health issue in the United States. Therefore, it is important to engage in quality control of the assessment, prevention, and treatment services for families affected by maltreatment. Parenting capacity assessments (PCAs) are typically an integral part of service delivery for families affected by maltreatment and can carry serious consequences for the referred parent. The Child Abuse Potential Inventory (CAPI) is a measure that is widely used in PCAs; however, socially desirable responding on the CAPI can serve to invalidate the important information derived from this assessment, as well as lead to negative impressions of the parent...
October 17, 2017: Child Abuse & Neglect
Rondroarivelo Rasoahanitralisoa, Niaina Rakotosamimanana, David Stucki, Christophe Sola, Sebastien Gagneux, Voahangy Rasolofo Razanamparany
BACKGROUND: Combining different molecular typing methods for Mycobacterium tuberculosis complex (MTBC) can be a powerful tool for molecular epidemiology-based investigation of TB. However, the current standard method that provides high discriminatory power for such a combination, mycobacterial interspersed repetitive units-variable numbers of tandem repeats typing (MIRU-VNTR), is laborious, time-consuming and often too costly for many resource-limited laboratories. We aimed to evaluate a reduced set of loci for MIRU-VNTR typing in combination with spoligotyping and SNP-typing for routine molecular epidemiology of TB...
2017: PloS One
Da Li, Guojie Xu, Guangxi Ren, Yufeng Sun, Ying Huang, Chunsheng Liu
The traditional medicine licorice is the most widely consumed herbal product in the world. Although much research work on studying the changes in the active compounds of licorice has been reported, there are still many areas, such as the dynamic accumulation of secondary metabolites in licorice, that need to be further studied. In this study, the secondary metabolites from licorice under two different methods of stress were investigated by ultra-high-performance liquid chromatography coupled with hybrid linear ion trap-Orbitrap mass spectrometry (UHPLC-LTQ-Orbitrap-MS)...
October 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Carsten Stephan, Klaus Jung
Prostate cancer (PCa) is, with an estimated number of 161,360 cases and 26,730 deaths in 2017, the most common malignancy in the USA [...].
October 20, 2017: International Journal of Molecular Sciences
Wen-Feng Wei, Yan-Tao Chu, Ye Liu, Jin-Hai Huo, Wei-Ming Wang
Ultra high performance liquid chromatography coupled with tandem quadrupole time of flight mass spectrometry(UPLC-Q-TOF-MS) was applied to metabonomics study in BALB/c mice infected with mycoplasma pneumoniae(MP) to analyze the changes in serum endogenous metabolites, identify potential biomarkers associated with mycoplasma pneumoniae pneumonia(MPP), analyze the metabolic pathway and explore the pathogenic mechanism of MPP. The BALB/c mice were inoculated with MP by repeated intranasal infectious routes to establish MPP models, and the results of the lung tissue biopsy, IgM and mycoplasma nucleic acid content determination showed that the models of MP in BALB/c mice were successfully established...
April 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Bo-Hou Xia, Yu-Zhen Hu, Su-Hui Xiong, Jie Tang, Qing-Zi Yan, Li-Mei Lin
To establish a random forest algorithm for identifying and classifying different brands of Xiasangju granules, and provide effective reference for identifying multi-index complex fingerprint. HPLC method was used to collect the fingerprint of 83 batches of Xiasangju granules from different manufacturers. The classification of Xiasangju granules samples based on chromatographic fingerprints was identified by chemometric methods including principal component analysis (PCA), partial least squares discriminate analysis (PLS-DA) and random forest analysis (RF)...
April 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Alice Wang, Nishi Karunasinghe, Lindsay Plank, Shuotun Zhu, Sue Osborne, Karen Bishop, Charis Brown, Tiffany Schwass, Jonathan Masters, Michael Holmes, Roger Huang, Christine Keven, Lynnette Ferguson, Ross Lawrenson
INTRODUCTION: Reduction in bone mineral density (BMD) is a common side effect of androgen deprivation therapy (ADT). We aimed to examine the cross-sectional and longitudinal variation in BMD and associated bone markers in patients with nonmetastatic prostate cancer (PCa) managed with and without ADT. METHODS: Bone mineral density of the total body, lumbar spine, femoral neck, ultradistal forearm, and one-third distal radius was measured in 88 patients with PCa without bone metastases at baseline and at 6 months...
2017: Clinical Medicine Insights. Oncology
Ferraro Stefano, Nasuti Cinzia, Piangerelli Marco, Guidi Marco, Giovannetti Rita, Ferri Augusto, Gabbianelli Rosita
Changes in the homeostasis of metals and microelements have been demonstrated in Parkinson's disease, whose etiology includes both a genetic and environmental basis. We studied the difference of microelements in the hair of Parkinson's disease subjects (n = 46) compared with healthy controls (n = 24). Hair was chosen as a representative matrix to measure microelements, since it is a vehicle of substance excretion from the human body and it allows for long-term evaluation of metal exposure. An inductively coupled plasma mass spectrometry (ICP-MS) analysis of hair collected from 24 Parkinson's patients compared with their healthy relatives used as controls shows a significant decrease in Ca (U = 166, p = 0...
November 16, 2016: Toxics
Erdal Benli, Ahmet Bayrak, Abdullah Cirakoglu, Tulin Bayrak, Tevfik Noyan
The aim of the study was to measure platelet-activating factor acetyl hydrolase (PAF-AH) and paraoxonase (PON1) enzyme activity levels in patients with high Psa values to compare with healthy peers and also to determine the efficacy of these parameters in predicting pathologic results of patients with high Psa values. This study included 66 patients with Psa value > 4 ng/dl (Group 1) and 44 patients with Psa <4 ng/dl (Group 2) for a total of 110 patients. Parameters measured in serum of PON1, PAF-AH, and MDA were compared between the groups...
November 2017: Kaohsiung Journal of Medical Sciences
Qi-Shi Du, Shu-Qing Wang, Neng-Zhong Xie, Qing-Yan Wang, Ri-Bo Huang, Kuo-Chen Chou
A two-level principal component predictor (2L-PCA) was proposed based on the principal component analysis (PCA) approach. It can be used to quantitatively analyze various compounds and peptides about their functions or potentials to become useful drugs. One level is for dealing with the physicochemical properties of drug molecules, while the other level is for dealing with their structural fragments. The predictor has the self-learning and feedback features to automatically improve its accuracy. It is anticipated that 2L-PCA will become a very useful tool for timely providing various useful clues during the process of drug development...
September 19, 2017: Oncotarget
Ignacio Puche-Sanz, María J Alvarez-Cubero, Manrique Pascual-Geler, Alba Rodríguez-Martínez, Miguel Delgado-Rodríguez, José L García-Puche, José Expósito, Inmaculada Robles-Fernández, Carmen Entrala-Bernal, José A Lorente, José M Cózar-Olmo, María J Serrano
Circulating tumor cells (CTCs) have been recently accepted as prognostic markers in metastatic prostate cancer (PCa). However, very few studies have analyzed their role in early-stage PCa. The aim of this research is to study the value of CTCs at the moment of PCa diagnosis and to identify different subpopulations of CTCs. Patients with PSA value > 4 ng/ml and clinical suspicion of PCa were included. Samples were collected immediately before prostatic biopsy. CTCs were isolated by immunomagnetic technique using a multi-CK specific antibody...
September 19, 2017: Oncotarget
Felix M Chinea, Vivek N Patel, Deukwoo Kwon, Narottam Lamichhane, Chris Lopez, Sanoj Punnen, Erin N Kobetz, Matthew C Abramowitz, Alan Pollack
BACKGROUND: Few studies focus on prostate cancer (PCa) outcomes in Hispanic/Latino men. Our study explores whether Hispanic/Latino subgroups demonstrate significantly different prostate cancer-specific mortality (PCSM) relative to Non-Hispanic White (NHW) and Non-Hispanic Black (NHB) men. METHODS: We extracted a population-based cohort of men diagnosed with local-regional PCa from 2000-2013 (n= 486,865). PCSM was measured in racial/ethnic groups: NHW (n=352,886), NHB (n= 70,983), Hispanic/Latino (n= 40,462), and Asian American/Pacific Islander (n= 22,534)...
September 19, 2017: Oncotarget
Qiong Liu, Qiong Gu, Zhao Wu
Proteomics data analysis based on the mass-spectrometry technique can provide a powerful tool for early diagnosis of tumors and other diseases. It can be used for exploring the features that reflect the difference between samples from high-throughput mass spectrometry data, which are important for the identification of tumor markers. Proteomics mass spectrometry data have the characteristics of too few samples, too many features and noise interference, which pose a great challenge to traditional machine learning methods...
October 12, 2017: Computers in Biology and Medicine
Didi Ma, Dandan Gong, Guoxiang Sun, Fangliang Yang
The fusion high performance liquid chromatographic fingerprint combined with quantification and principal component analysis (PCA) was successfully developed, which was applied to assess the quality consistency of 25 Yinqiaojiedu tablets (YQJDTs). The resolution index I was employed as an objective function to evaluate chromatographic conditions. The chromatographic fingerprints were established by reversed-phase high performance liquid chromatography. The wavelengths were set at 230, 279 and 327 nm, separately...
July 8, 2017: Se Pu, Chinese Journal of Chromatography
Sarwar Beg, Sumant Saini, Shantanu Bandopadhyay, O P Katare, Bhupinder Singh
PURPOSE: The current research work entails Quality by Design (QbD)-based systematic development of nanostructured lipid carriers (NLCs) of olmesartan medoxomil (OLM) with improved biopharmaceutical attributes. METHODS: Quality target product profile (QTPP) was defined and critical quality attributes (CQAs) were earmarked. Solubility of drug was performed in various lipids for screening of them. NLCs were prepared by hot-microemulsion method using solid lipids, liquid lipids and surfactants with maximal solubility...
October 19, 2017: Drug Development and Industrial Pharmacy
Xianpeng Li, Ran Liao, Jialing Zhou, Priscilla T Y Leung, Meng Yan, Hui Ma
We present the Mueller matrix imaging system to classify morphologically similar algae based on convolutional neural networks (CNNs). The algae and cyanobacteria data set contains 10,463 Mueller matrices from eight species of algae and one species of cyanobacteria, belonging to four phyla, the shapes of which are mostly randomly oriented spheres, ovals, wheels, or rods. The CNN serves as an automatic machine with learning ability to help in extracting features from the Mueller matrix, and trains a classifier to achieve a 97% classification accuracy...
August 10, 2017: Applied Optics
Jianbo Du, Daojing Li, Meng Ma
To improve the target detection performance of inverse synthetic aperture ladar (ISAL) under the situation that there is Doppler bandwidth ambiguity, we consider energy accumulation of echo signals along a range through matched illumination. However, since the target impulse responses change with the target aspect angle, the phase shifts along slow-time between range cells are different, and the output of matched illumination fluctuates along slow-time. To reduce the slow-time fluctuation of matched illumination under additive white Gaussian noise assumption, we have proposed an interferometric ISAL (InISAL) target detection method based on interferometry processing and principal component analysis (PCA) in this paper...
September 20, 2017: Applied Optics
Xianyang Qian, Xinhong Jia, Zinan Wang, Bin Zhang, Naitian Xue, Wei Sun, Qiheng He, Han Wu
Due to the similarity of Brillouin optical time domain analyzer (BOTDA) signals, image denoising could be utilized to remove the noise. However, the performance can be much degraded due to inaccurate noise level estimation. By numerical and experimental study, we compare the noise level estimation of three different methods for BOTDA: calculating the standard deviation (STD) of the measurements, a filter-based estimation algorithm, and a patch-based estimation algorithm proposed in this paper, which selects weak textured patches of BOTDA signal and then estimates noise level using principal component analysis (W-PCA)...
June 1, 2017: Applied Optics
Xiao-Yi Zhou, Xi-Ming Xu, Jian-Ping Fan, Fei Wang, Sui-Yi Wu, Zi-Cheng Zhang, Yi-Lin Yang, Ming Li, Xian-Zhao Wei
BACKGROUND: No effective constructs were available in mainland China to assess the whole spine function. The SFI was developed to evaluate spinal function based on the concept of a single kinetic chain concept for whole spine. The SFI has been translated to Spanish and Turkish with accepted psychometric properties. It is imperative to introduce the SFI in mainland China and further to explore the measurement properties. METHODS: The English versions of the SFI was cross-culturally translated according to international guidelines...
October 18, 2017: Health and Quality of Life Outcomes
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