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https://www.readbyqxmd.com/read/28936846/-lignans-from-barks-of-ailanthus-altissima
#1
Dong Liu, Jian Zhang, Shao-Nan Tang, Xiao-Qi Zhang, Wen-Cai Ye
Eleven lignans were isolated from the ethanol extract of the barks of Ailanthus altissima through various column chromatography methods including silica gel, Sephadex LH-20, ODS and HPLC. By physical, chemical and comprehensive spectroscopic methods, their structures were identified as (+)-neoolivil(1), prunustosanan AI (2), (7S,8R)-guaiacyl-glycerol-β-O-4'-neolignan (3), (7R,8S)-guaiacyl-glycerol-β-O-4'-neolignan (4), (7S,8R)-1-(4-hydroxy-3-methoxyphenyl)-2-[4-(3-hydroxypropyl)-2,6-dimethoxyphenoxy]-1,3-propanediol(5), pinnatifidanin B V (6), pinnatifidanin B VI (7), (7R,7'R,7″S,8S,8'S,8″S)-4',4″-dihydroxy-3,3',3″,5-tetramethoxy-7,9':7',9-diepoxy-4,8″-oxy-8,8'-sesquineolignan-7″,9″-diol (8), hedyotol D (9), 5-(2-propenyl)-7-methoxy-2-(3,4-methylenediovxyphenyl)benzofuran (10), and (7R,8S,7'E)-guaiacyl-glycerol-β-O-4'-sinapyl ether(11)...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28932775/spectral-and-raw-quasi-in-situ-energy-dispersive-x-ray-data-captured-via-a-tem-analysis-of-an-ods-austenitic-stainless-steel-sample-under-1%C3%A2-mev-kr-2-high-temperature-irradiation
#2
Adam J Brooks, Zhongwen Yao
The data presented in this article is related to the research experiment, titled: 'Quasi in-situ energy dispersive X-ray spectroscopy observation of matrix and solute interactions on Y-Ti-O oxide particles in an austenitic stainless steel under 1 MeV Kr(2+) high temperature irradiation' (Brooks et al., 2017) [1]. Quasi in-situ analysis during 1 MeV Kr(2+) 520 °C irradiation allowed the same microstructural area to be observed using a transmission electron microscope (TEM), on an oxide dispersion strengthened (ODS) austenitic stainless steel sample...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28931290/-obstructed-defecation-syndrome-review-article
#3
L Sákra, J Šiller
INTRODUCTION: Obstructed defecation syndrome (ODS) is one of the main causes of primary constipation. It is caused by anatomical disorders in the pelvic floor region (rectocoele, en-terocoele, rectal intussusception, rectal prolapse), but it always occurs in combination with a functional defect of defecation. This review provides a comprehensive view of the diagnosis and treatment of the syndrome. METHOD: Treatment may be conservative or surgical. Conservative treatment involves a complex of approaches to the practice of defecation, regime and dietary measures together with pelvic floor rehabilitation and psychological support...
2017: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/28929654/-chemical-studieson-hydrophilic-constituents-of-toad-skin
#4
Shao-Kun Xin, Nan Si, Hong-Jie Wang, Jian Yang, Bo Gao, Xiao-Lu Wei, Hai-Yu Zhao, Bao-Lin Bian
Fifteen compounds were isolated from the toad skin by a combination of various chromatographic methods including macroporous resin, silica gel, ODS and semi-preparative HPLC. Their structures were identified as 4,5-dimethyl-1,3,4,5-tetrahydropyrrolo[4,3,2-de]quinolin-6-ol(1), serotonin(2), N-methyl serotonin(3), O-methyl bufotenine(4), 1,2,3,4-tetrahydro-6-hydroxy-β-carboline(5), O-methylserotonin(6), glycinebetaine(7), caffeine(8), bufotenine(9), shepherdine(10), tryptophan(11), (5-hydroxy-1H-indol-3-yl)acetic acid(12), 5-hydroxy tryptophol(13), 2-methyl-6-hydroxy-1,2,3,4-tetrahydro-β-carboline(14), bufothionine(15)...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28919686/high-performance-liquid-chromatography-ultraviolet-photodiode-array-detection-method-for-aflatoxin-b1-in-cattle-feed-supplements
#5
Lazuardi Mochamad, Bambang Hermanto
AIM: The objective of the current study is to determine the concentration of aflatoxin B1 using high-performance liquid chromatography (HPLC) with a photodiode array (PDA) detector. MATERIALS AND METHODS: Aflatoxin B1 certified reference grade from Trilogy Analytical Laboratory dissolved acetonitrile (ACN) at 10 µg/mL was using standard assessment. HPLC instruments such as ultraviolet-PDA detector used a Shimadzu LC-6AD pump with DGU-20A5 degasser, communication module-20A, and PDA detector SPD-M20A with FRC-10A fraction collector...
August 2017: Veterinary World
https://www.readbyqxmd.com/read/28919469/assignment-of-the-absolute-configuration-of-hepatoprotective-highly-oxygenated-triterpenoids-using-x-ray-ecd-nmr-j-based-configurational-analysis-and-hsqc-overlay-experiments
#6
Xiaojuan Wang, Jiabao Liu, Pankaj Pandey, Jiabao Chen, Frank R Fronczek, Stuart Parnham, Xinzhu Qi, Robert J Doerksen, Daneel Ferreira, Hua Sun, Shuai Li, Mark T Hamann
BACKGROUND: The plants of the genus Kadsura are widely distributed in China, South Korea, and Japan. Their roots and stems are traditionally used to treat blood diseases and pain. The main bioactive constituents of Kadsura longipedunculata comprise highly oxygenated triterpenoids. Schiartane-type nortriterpenoids showed anti-HIV, anti-HBV, and cytotoxic bioactivities. For such compounds, the absolute configuration influences the bioactivities, and hence its unambiguous determination is essential...
September 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28906146/new-cerebroside-and-chondrocyte-proliferation-activity-of-caryota-mitis-l
#7
Pham Thi Nhat Trinh, Nguyen Thi To Quynh, Mai Dinh Tri, Phan Nhat Minh, Nguyen Thi Le Thuy, Luu Hong Truong, Nguyen Ngoc Tuan, Le Tien Dung
Caryota mitis L., a flowering plant, belongs to the family Arecaceae. In Vietnam, its fruits were used to treat joint pain. The present study was designed to investigate the phytochemicals and chondrocyte proliferation activity of C. mitis L. fruits on young human chondrocyte. The results showed that all of extracts (crude extract as well as n-hexane, chloroform, ethyl acetate and methanol fractions) were stimulated the growth of chondrocyte at 0.1 μg/mL; 0.01 μg/mL concentrations, of which the n-hexane and methanol fractions significantly increased the proliferation of chondrocyte by 30...
September 14, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28890269/characterization-and-purification-of-anthocyanins-from-black-peanut-arachis-hypogaea-l-skin-by-combined-column-chromatography
#8
Zhenlei Zhao, Min Wu, Yali Zhan, Kanghua Zhan, Xiulian Chang, Hongshun Yang, Zhanming Li
Black peanut skins as a byproduct from peanut industry contain abundant anthocyanins, evaluated as 8.61±0.27mg/g dry black peanut skins, are currently poorly exploited. In this work, four anthocyanins and three major flavonols were detected and identified by HPLC-PDA-ESI-MS/MS from the acidified water extract of black peanut skins of Arachis hypogaea L. After preliminary removal of flavonols by ethyl acetate (EtOAc), further purification of the anthocyanins was conducted using a combination of Amberlite XAD-7HP and ODS-AQ-HG column chromatography methods...
October 13, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28888755/an-atmospheric-pressure-chemical-ionisation-liquid-chromatographic-tandem-mass-spectrometry-method-for-the-analysis-of-benzodiazepines-in-urine
#9
S Dunlop, K Hayes, P Leavy, D Cusack, R Maguire
The objective of this work was to establish an analytical method for the analysis of 7 Benzodiazepines (diazepam, oxazepam, temazepam, nordiazepam, desalkylflurazepam, alprazolam and α-hydroxyalprazolam) in urine specimens taken from drivers suspected of driving under the influence of drugs. The specimen, calibrator and control preparation involved hydrolysis of conjugated benzodiazepines using β-glucuronidase in sodium acetate buffer, with incubation at 60°C for 2h. Specimens were then centrifuged, before being diluted 1 in 5 (total dilution 1 in 10), with 10% acetonitrile in water...
August 24, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28870589/subcutaneous-bolus-immunoglobulin-dose-in-cidp-a-proof-of-concept-study
#10
Dario Cocito, Erdita Peci, Alberto Romagnolo, Simona Rigaldo, Michela Rosso, Leonardo Lopiano, Aristide Merola
BACKGROUND: Subcutaneous (SC) immunoglobulin (Ig) is an effective therapy for Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP). However, optimal dosage and frequency of administration remain to be clarified. OBJECTIVES: We sought to assess the feasibility and tolerability of a novel regimen of SCIg administration, based on concentrated "bolus" doses delivered every other week, as compared to the "conventional" SCIg regimen, based on 1-3 administrations/week...
September 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28869797/identification-of-the-biosynthesis-gene-cluster-for-the-novel-lantibiotic-paenilan-from-paenibacillus-polymyxa-e681-and-characterization-of-its-product
#11
Jae-Eun Park, Ha-Rim Kim, Soo-Young Park, Soo-Keun Choi, Seung-Hwan Park
AIMS: To analyse the function of a putative lantibiotic gene cluster of Paenibacillus polymyxa E681 and to characterize its product, paenilan. METHODS AND RESULTS: Comparative analysis of the lantibiotic gene cluster of E681 revealed that the cluster, consisting of 11 open reading frames, is involved in the biosynthesis of a class I lantibiotic. The pnlA gene encoding the prepeptide PnlA was identified and P. polymyxa strain EPT14 producing only paenilan was constructed by knockout of the other five antibiotic biosynthetic gene clusters of E681...
September 4, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28867804/fviia-stf-and-thrombin-inhibitory-activities-of-compounds-isolated-from-microcystis-aeruginosa-k-139
#12
Andrea Roxanne J Anas, Akane Mori, Mineka Tone, Chiaki Naruse, Anna Nakajima, Hirohiko Asukabe, Yoshiaki Takaya, Susumu Y Imanishi, Tomoyasu Nishizawa, Makoto Shirai, Ken-Ichi Harada
The rise of bleeding and bleeding complications caused by oral anticoagulant use are serious problems nowadays. Strategies that block the initiation step in blood coagulation involving activated factor VII-tissue factor (fVIIa-TF) have been considered. This study explores toxic Microcystis aeruginosa K-139, from Lake Kasumigaura, Ibaraki, Japan, as a promising cyanobacterium for isolation of fVIIa-sTF inhibitors. M. aeruginosa K-139 underwent reversed-phase solid-phase extraction (ODS-SPE) from 20% MeOH to MeOH elution with 40%-MeOH increments, which afforded aeruginosin K-139 in the 60% MeOH fraction; micropeptin K-139 and microviridin B in the MeOH fraction...
August 30, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28865818/single-vs-2-implants-on-peri-implant-marginal-bone-level-and-implant-failures-in-mandibular-implant-overdentures-a-systematic-review-with-meta-analysis
#13
REVIEW
Dina Mohamed Ahmed Elawady, Amal Fathy Kaddah, Mohamed Talaat Khalifa
BACKGROUND: As a consensus, the 2-implant supported overdentures (ODs) are considered as the first choice of treatment for the edentulous mandible. In the same context, there is increased evidence supporting the use of single-implant OD. The aim of any design is to preserve the remaining structures and allow the longevity of the treatment. OBJECTIVES: To evaluate the impact of single implant vs 2 implants on the peri-implant marginal bone loss (MBL) and number of implant failures in mandibular implant overdentures...
September 2017: Journal of Evidence-based Dental Practice
https://www.readbyqxmd.com/read/28863788/role-of-the-national-institute-of-standards-and-technology-nist-in-support-of-the-vitamin-d-initiative-of-the-national-institutes-of-health-office-of-dietary-supplements
#14
Stephen A Wise, Susan S-C Tai, Carolyn Q Burdette, Johanna E Camara, Mary Bedner, Katrice A Lippa, Michael A Nelson, Federica Nalin, Karen W Phinney, Lane C Sander, Joseph M Betz, Christopher T Sempos, Paul M Coates
Since 2005, the National Institute of Standards and Technology (NIST) has collaborated with the National Institutes of Health (NIH), Office of Dietary Supplements (ODS) to improve the quality of measurements related to human nutritional markers of vitamin D status. In support of the NIH-ODS Vitamin D Initiative, including the Vitamin D Standardization Program (VDSP), NIST efforts have focused on (1) development of validated analytical methods, including reference measurement procedures (RMPs); (2) development of Standard Reference Materials (SRMs); (3) value assignment of critical study samples using NIST RMPs; and (4) development and coordination of laboratory measurement QA programs...
September 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28860892/patterns-of-health-care-utilization-and-cost-before-and-after-opioid-overdose-findings-from-10-year-longitudinal-health-plan-claims-data
#15
Daniel D Maeng, John J Han, Michael H Fitzpatrick, Joseph A Boscarino
OBJECTIVE: To describe the longitudinal pattern of health care utilization and cost of care before and after opioid overdose (OD) over a 10-year period using health plan claims data. METHODS: Patients who had experienced opioid ODs between April 2005 and March 2015 were identified from Geisinger Health System's electronic health records. Among these patients, a subgroup of patients who were Geisinger Health Plan (GHP) members at any point between January 2006 and December 2015 were also identified...
2017: Substance Abuse and Rehabilitation
https://www.readbyqxmd.com/read/28858367/silver-nanocrystal-decorated-polyoxometalate-single-walled-nanotubes-as-nanoreactors-for-desulfurization-catalysis-at-room-temperature
#16
Hao Zhang, Xiaobin Xu, Haifeng Lin, Muhammad Aizaz Ud Din, Haiqing Wang, Xun Wang
Ultrathin nanocrystals generally provide a remarkable catalytic performance due to their high specific surface area and exposure of certain active sites. However, deactivation caused by growth and gathering limits the catalytic application of ultrathin nanocrystals. Here we report Ag nanocrystal-decorated polyoxometalate (Ag-POM) single-walled nanotubes assembled via a concise, surfactant-free soaking method as a new kind of well-defined core-sheath nanoreactor. The diameter of Ag nanocrystals inside polyoxometalate nanotubes can be controlled via simply adjusting the reactant concentration...
September 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/28856068/sero-diagnosis-of-active-mycobacterium-tuberculosis-disease-among-hiv-co-infected-persons-using-thymidylate-kinase-based-antigen-and-antibody-capture-enzyme-immuno-assays
#17
Misaki Wayengera, Ivan Mwebaza, Johnson Welishe, Cynthia Nakimuli, David P Kateete, Eddie Wampande, Samuel Kirimunda, Lois Bayigga, Carol Musubika, Peace Babirye, Benon Asiimwe, Moses L Joloba
BACKGROUND: Clinical and laboratory diagnosis of Active Tuberculosis (ATB) and latent Mycobacterium Tuberculosis (M. tuberculosis) infections (LTBI) among people living with HIV/AIDS (PLWHA) presents formidable challenges. In the past, WHO issued an advisory against the use of existing TB sero-diagnostics. Emerging evidence, however, points to a precision of TB sero-diagnostics based on secretory rather than structural M. tuberculosis antigens. We hypothesized that secretory levels of M...
June 2017: Mycobacterial Diseases: Tuberculosis & Leprosy
https://www.readbyqxmd.com/read/28855474/determination-of-diniconazole-in-agricultural-products-livestock-and-marine-products-by-lc-ms-ms
#18
Takayuki Asakura, Mariko Kitamura, Wataru Seki, Tomonari Iida, Mitsuo Nakazato, Kazuo Yasuda, Satoru Nemoto
An LC-MS/MS method for the determination of diniconazole in agricultural products, livestock and marine products was developed. Diniconazole in agricultural products was extracted with acetone. The extract was concentrated and partitioned with n-hexane and 10% sodium chloride solution. Agricultural products such as grains and beans were defatted using n-hexane-acetonitrile. Livestock and marine products were extracted with a mixture of acetone and n-hexane, and the organic layer was evaporated to dryness. The residue was defatted using n-hexane-acetonitrile...
2017: Shokuhin Eiseigaku Zasshi. Journal of the Food Hygienic Society of Japan
https://www.readbyqxmd.com/read/28854403/an-hplc-ms-ms-method-for-quantitation-of-gly-mca-in-mouse-plasma-application-to-a-pharmacokinetic-study
#19
Jia Liu, Guan Lian, Ting Wang, Yuanheng Ma, Junto Zhou, Changtao Jiang, Yuxin Yin
A simple, sensitive and rapid method using high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed and validated for quantification of glycine-β-muricholic acid (Gly-MCA) in mouse plasma for the first time. Plasma samples were pretreated with protein precipitation. The analyte and internal standard were separated on a Shimadzu Shim-pack XR-ODS column (4.6×50mm, 2.2μm) using 0.1% formic acid-water-methanol as mobile phase, with a runtime of 5min. Detection was performed using negative ion electrospray tandem mass spectrometry via multiple reaction monitoring (MRM) scan mode...
August 12, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28851527/determination-of-3-hydroxypropylmercapturic-acid-in-urine-by-three-column-switching-high-performance-liquid-chromatography-with-electrochemical-detection-using-a-diamond-electrode
#20
Kyohei Higashi, Mana Shibasaki, Kyoshiro Kuni, Takeshi Uemura, Masaaki Waragai, Kenichi Uemura, Kazuei Igarashi, Toshihiko Toida
A three column-switching high-performance liquid chromatography (HPLC) using an electrochemical detector (ECD) equipped with a diamond electrode was established to determine 3-hydroxypropylmercapturic acid (3-HPMA) in urine. An extracted urine sample was consecutively fractionated using a strong anion-exchange column (first column) and a C8 column (second column) via a switching valve before application on an Octa Decyl Silyl (ODS) column (third column), followed by ECD analysis. The% recovery of 3-HPMA standard throughout the three-column process and limit of detection (LOD) were 94±1% and 0...
August 26, 2017: Journal of Chromatography. A
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