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Nannan Wang, Xiaoning Zhao, Yiran Li, Congcong Cheng, Jiaxin Huai, Kaishun Bi, Ronghua Dai
To reveal the material basis of Huo Luo Xiao Ling Dan, a sensitive and selective ultra-high performance liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry (UHPLC-Q-TOF/MS) method was developed to identify the absorbed components and metabolites in rat plasma after oral administration of HLXLD. The plasma samples were pretreated by liquid-liquid extraction and separated on a Shim-pack XR-ODS C18 column (75 mm × 3.0 mm, 2.2 μm) using a gradient elution program. With the optimized conditions and single sample injection of each positive or negative ion mode, a total of 109 compounds, including 78 prototype compounds and 31 metabolites were identified or tentatively characterized...
January 19, 2018: Biomedical Chromatography: BMC
Masayuki Hata, Kazuaki Miyamoto
The authors reviewed 93 consecutive cases with optic disc swelling (ODS) to compare clinical manifestations and prognosis among the causes. Among unilateral ODS patients ≥50 years old and without pain, anterior ischaemic optic neuropathy accounted for 87.5%. Furthermore, papilloedema (PE) presented unilateral ODS with an atrophic or hypoplastic disc in the opposite eye. Despite no differences for age and initial visual acuity between PE and pseudopapilloedema, the two main causes of bilateral ODS, some PE patients showed poor visual prognosis...
August 2017: Neuro-ophthalmology
Jian Ren, Liming Yu, Yongchang Liu, Chenxi Liu, Huijun Li, Jiefeng Wu
Oxide dispersion strengthened (ODS) steels with different contents of zirconium (denoted as 16Cr ODS, 16Cr-0.3Zr ODS and 16Cr-0.6Zr ODS) were fabricated to investigate the effects of Zr on strengthening mechanism of Al-alloyed 16Cr ODS steel. Electron backscatter diffraction (EBSD) results show that the mean grain size of ODS steels could be decreased by Zr addition. Transmission electron microscope (TEM) results indicate that Zr addition could increase the number density but decrease the mean diameter and inter-particle spacing of oxide particles...
January 12, 2018: Materials
Tengfei Li, Zhimin Cui, Yan Wang, Wen Yang, Duo Li, QinXin Song, Luning Sun, Li Ding
As an orally active iron chelator, deferasirox forms its ion complexes in the prepared plasma samples and LC-MS mobile phase where ferric ion exists, and then comparing with the nominal concentration level, a lower detected concentration level of deferasirox would be obtained after LC-MS analysis, if no proper treatment was adopted. Meanwhile, the phenomenon would be observed that multiple repeat injections of the same deferasirox plasma sample in the same tube would show the lower and lower detected concentration levels of deferasirox, which caused by more and more ferric ions from the injection needle dissolved in the sample solution as multiple repeated injections...
December 28, 2017: Journal of Pharmaceutical and Biomedical Analysis
Graciela Granados-Guzmán, Ricardo Salazar-Aranda, Marsela Garza-Tapia, Rocío Castro-Ríos, Noemí Waksman de Torres
Background: The search for new natural or synthetic products with antioxidant activity is commonly based on methods that involve reduction of either 2,2-diphenyl-1-picrylhydrazyl (DPPH) or 2-2-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS). However, the reported values of the effective concentrations are highly variable, even in controls. Herein, we optimize and validate both meth-ods of determining antiradical activity. Methods: Optimization was carried out using both a fractionated factorial design and a basic sequential simplex method, by monitoring the reduction percentage...
December 2017: Current Analytical Chemistry
Nailiang Zhu, Zhonghao Sun, Meigeng Hu, Yedan Li, Dawei Zhang, Haifeng Wu, Yu Tian, Pengfei Li, Junshan Yang, Guoxu Ma, Xudong Xu
The tubers of the medicinal plant Hemsleya penxianensis (Cucurbitaceae) yielded 11 cucurbitane-type triterpenes Xuedanencins A-K by silica gel column, ODS column, and pre-HPLC techniques. Their structures were determined by spectroscopic analysis and examined alongside existing data from prior studies. Separated compounds were evaluated for cytotoxic activity against the Hela human cancer cell line and compounds 7 and 8 showed significant cytotoxicity with IC50 values at 1.82 and 2.45 μM, respectively.
December 26, 2017: Phytochemistry
V I Kravchenko, A A Chumak, K M Loganovsky, I S Diagil, V F Kuzmenko
A clinical case of the rituximab («Rituksim», «Mabthera») use to treat a man affected by the Chornobyl NPP acci dent with malignant resistant form of myasthenia gravis in conjunction with chronic mixed infection by Toxoplasma, Epstein Barr virus, Cytomegalovirus and Herpes simplex virus is described. In the dynamics of two year's observa tion the clinical efficacy of monoclonal antibodies was shown as the main symptoms stabilization and reducing doses of glucocorticoid and anticholinergic therapy. The positive effect was marked in the nearest and remote peri ods...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
Yonghong Yu, Bin Zhang, Jianhua Ding, Guangzuan Zhuo, Guowei Ni, Jun Zhu, Ke Zhao
OBJECTIVE: To evaluate the long-term efficacy of stapled transanal rectal resection (STARR) in treating obstructed defecation syndrome(ODS). METHODS: Clinical data of 95 female patients with ODS undergoing STARR at Department of Colorectal Surgery, Rocket Army General Hospital from February 2010 to August 2012 were analyzed retrospectively. The Cleveland constipation scoring system (CSS), Longo ODS scoring system and severe symptoms score(SSS) were used to evaluate the degree and intensity of clinical symptoms...
December 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
Richard Lemke, Simon Merz
This study builds on research about the importance of body presentation among men who have sex with men (MSM) by exploring the phenomenon of nude body presentation in online dating environments. In a quantitative survey of N = 9,235 MSM users of a gay online dating site (ODS) in Germany, the prevalence of nude pictures and gratifications sought while displaying them were investigated. About two-thirds of the participants declared that they use nude pictures in their dating profiles, with only small differences in prevalence between members of different ages, education levels, and sexual orientation...
December 20, 2017: Cyberpsychology, Behavior and Social Networking
Yongkang Xi, Zhigang Luo, Xuanxuan Lu, Xichun Peng
Cyclodextrins was proved to form complexes with linear oil molecules and stabilize emulsions. Amphiphilic properties of cyclodextrins particles were modulated through esterification reaction between β-cyclodextrins (β-CD) and octadecenyl succinic anhydride (ODSA) under alkaline conditions. ODS-β-CD particles with DS of 0.003, 0.011 and 0.019 were obtained. . The introduced hydrophobic long chain that was linked within β-CD cavity led to the change of ODS-β-CD in terms of morphological structure, surface charge density, size and contact angle, upon which the properties and stability of the emulsions stabilized by ODS-β-CD were highly dependent...
December 18, 2017: Journal of Agricultural and Food Chemistry
Chun-Hao Lai, Yu-Wei Hsu, Jiunn-Tay Lee, Yaw-Don Hsu, Chun-An Cheng, Chia-Kuang Tsai
PURPOSE: The osmotic demyelination syndrome (ODS) has been identified as a neurological complication of the rapid correction of hyponatremia. In recent years, however, various medical conditions have been associated with the development of ODS, irrelevant to changes in serum sodium. We present a rare case of a eunatremic patient who developed ODS with manifestation of parkinsonism. CASE: A 55 years old woman who has hypertension, type 2 diabetes nephropathy in end-stage renal disease under maintenance hemodialysis came to us with complaint about newly developed resting tremor of bilateral upper limbs, slowness of movements and small shuffling steps...
June 15, 2017: Acta Neurologica Taiwanica
Khadije Najafi, Sajad Ahmadi, Mahdi Rahpeyma, Habibolah Khazaie, Asad Vaisi-Raygani, Ali Moini, Amir Kiani
Opioid compound and methamphetamine are commonly used in drug abuse; these can disrupt the normal function of cellular and molecular systems, leading to several events such as oxidative stress, aging, apoptosis, and necrosis. Malondialdehyde (MDA) is the most important biomarker for evaluation of oxidative stress and determination of lipid peroxidation. In this study, 42 drug abusers and 22 healthy persons participated as case and control groups, respectively. MDA in volunteer sera was determined by high-performance liquid chromatography (HPLC) with fluorescence detection after pre-column derivatization using thiobarbituric acid...
October 2017: Acta Medica Iranica
Erika V Almeida, Samuel L De Brito
INTRODUCTION: Complexes of technetium-99m (99mTc) with meso-dimercaptosuccinic acid (DMSA) have been widely used as diagnostic agents in nuclear medicine. The degradation products (DP) of DMSA formed under different forced conditions have been identified through HPLC-DAD and LC-MSn studies. In this study, the DMSA kit was subjected to forced degradation under hydrolysis conditions as prescribed by the International Conference on Harmonization (ICH) guideline Q1A. METHODS: Chromatographic separation was accomplished on a reverse phase Shim-Pack VP-ODS (150 mm × 4...
November 10, 2017: Nuclear Medicine and Biology
Shinobu Yamamoto, Akiko Matsumoto, Yuko Yui, Shota Miyazaki, Shinji Kumagai, Hajime Hori, Masayoshi Ichiba
OBJECTIVES: N,N-Dimethylacetamide (DMAC) is widely used in industry as a solvent. It can be absorbed through human skin. Therefore, it is necessary to determine exposure to DMAC via biological monitoring. However, the precision of traditional gas chromatography (GC) is low due to the thermal decomposition of metabolites in the high-temperature GC injection port. To overcome this problem, we have developed a new method for the simultaneous separation and quantification of urinary DMAC metabolites using liquid chromatography-tandem mass spectrometry (LC-MS/MS)...
December 6, 2017: Journal of Occupational Health
Andrew M Sand, Chad E Hoyer, Kamal Sharkas, Katherine Marie Kidder, Roland Lindh, Donald G Truhlar, Laura Gagliardi
Analytic gradient routines are a desirable feature for quantum mechanical meth- ods, allowing for efficient determination of equilibrium and transition state structures and several other molecular properties. In this work, we present analytical gradients for multiconfiguration pair-density functional theory (MC-PDFT) when used with a state-specific complete active space self-consistent field reference wave function. Our approach constructs a Lagrangian that is variational in all wave function parameters. We find that MC-PDFT locates equilibrium geometries for several small- to medium- sized organic molecules that are similar to those located by complete active space second-order perturbation theory but that are obtained with decreased computational cost...
December 6, 2017: Journal of Chemical Theory and Computation
Christine L Taylor, Christopher T Sempos, Cindy D Davis, Patsy M Brannon
The science surrounding vitamin D presents both challenges and opportunities. Although many uncertainties are associated with the understandings concerning vitamin D, including its physiological function, the effects of excessive intake, and its role in health, it is at the same time a major interest in the research and health communities. The approach to evaluating and interpreting the available evidence about vitamin D should be founded on the quality of the data and on the conclusions that take into account the totality of the evidence...
December 1, 2017: Nutrients
Yeon-Jun Yang, Kun Woo Kim, Ji Eun Choi, Min Young Lee, Dong Soo Yoo, Jae Yun Jung
OBJECTIVES: The aim of the study is to evaluate whether horizontal ocular deviation (OD) from MR imaging in the emergency room (ER) reflects vestibular imbalance, by comparing the horizontal OD in patients with acute vestibulopathy to controls. STUDY DESIGN: Retrospective review. PATIENTS AND METHODS: A total of 69 patients with acute unilateral peripheral vestibulopathy and 30 healthy subjects were included. Horizontal OD was quantified by using the axial T2-weighted fast-spin echo (FSE) images of the brain at 1...
November 29, 2017: Otology & Neurotology
Hai-Lin Long, Kang-Qiang Li, Wen-Dong Xu, Yu-Ping Fu
We have carried out the investigation on a sponge-derived fungus,which was identified as Emericella variecolor from the south sea of China. Two new chemical constituents,(+)-2-acetyl-dihydroterrein (1) and (+)-3-acetyl-dihydroterrein (2),with four known compounds,anditomin (3),andilesin A (4),andilesin C (5) and andilesin B (6),were isolated from this fungus by column chromatography over silica gel, Sephadex LH-20, and ODS. The structures of 1 and 2 were elucidated by spectroscopic methods including NMR,HR-ESI-MS,and CD...
September 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Ailong Cai, Lei Li, Zhizhong Zheng, Hanming Zhang, Linyuan Wang, Guoen Hu, Bin Yan
In medical imaging fields, many of the conventional regularization meth-ods, such as total variation or total generalized variation, impose strong prior assumptions on images which can only account for very limited classes of im-ages. A more reasonable sparse representation frame for images is still in strong need. Visually understandable images contain meaningful patterns and the combinations or collections of these patterns can be utilized to form some sparse and redundant representations which can promisingly facilitate image reconstructions...
November 30, 2017: Physics in Medicine and Biology
Shui-Ling Wu, Yan-Ping Liu, Guang-Ying Chen, Chang-Ri Han, Xiao-Ping Song, Xia Zhong, Yan-Hui Fu
The chemical consituents from Artabotrys hongkongensis were separated and purified by column chromatographies with silica gel, Sephadex LH-20, ODS and RP-HPLC. The structures of the isolated compounds were identified on the basis of physicochemical properties and spectroscopic analysis, as well as comparisons with the data reported in the literature. As a result, 16 sesquiterpenes were isolated and elucidated as blumenol A (1), 4, 5-dihydroblumenol A (2), (6R, 9S)-3-oxo-a-ionol (3), 3-hydroxy-β-ionone (4), dehydrovomifoliol (5), (3R, 6R, 7E) -3-hydroxy-4, 7-megastigmadien-9-one (6), sarmentol F (7), 10-oxo-isodauc-3-en-15-oic acid (8), fukinone (9), petasitolone (10), β-eudesmol (11), trans-3β-(1-hydroxy-1-methylethyl)- 8aβ-methyl-5-methylenedecalin-2-one (12), 10-hydroxyaristolan-9-one (13), aristol-8-en-1-one (14), aristolan-9-en-1-one (15), and aristolan-1, 9-diene (16)...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
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