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https://www.readbyqxmd.com/read/27914995/transdermal-skin-patch-based-on-reduced-graphene-oxide-a-new-approach-for-photothermal-triggered-permeation-of-ondansetron-across-porcine-skin
#1
Florina Teodorescu, Gurvan Quéniat, Catherine Foulon, Marie Lecoeur, Alexandre Barras, Samia Boulahneche, Mohmaed Salah Medjram, Thomas Hubert, Amar Abderrahmani, Rabah Boukherroub, Sabine Szunerits
The development of a skin-mounted patch capable of controlled transcutaneous delivery of therapeutics through thermal activation provides a unique solution for the controlled release of active principles over long-term periods. Here, we report on a flexible transdermal patch for photothermal triggered release of ondansetron (ODS), a commonly used drug for the treatment of chemotherapy-induced nausea and vomiting and used as model compound here. To achieve this, a dispersion of ODS-loaded reduced graphene oxide (rGO-ODS) nanosheets were deposited onto Kapton to produce a flexible polyimide-based patch...
November 30, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/27906622/sensitive-liquid-chromatography-mass-spectrometry-lc-ms-assay-reveals-novel-insights-on-dna-methylation-and-incorporation-of-gemcitabine-its-metabolite-difluorodeoxyuridine-deoxyuridine-and-rx-3117-into-dna
#2
Richard J Honeywell, Dzjemma Sarkisjan, Ietje Kathmann, Michael H Kristensen, Godefridus J Peters
Antimetabolites are incorporated into DNA and RNA, affecting their function. Liquid-chromatography-mass-spectrometry (LC-MS-MS) permits the sensitive, selective analysis of normal nucleosides. The method was adapted to measure the incorporation of deoxyuridine, gemcitabine (difluorodeoxycytidine), its metabolite difluorodeoxyuridine (dFdU), and the novel compound fluorocyclopentenylcytosine (RX3117). DNA was degraded to its deoxynucleotides for quantification by LC-MS-MS, gradient chromatography on a Phenomenex prodigy-3-ODS with positive ionization...
December 2016: Nucleosides, Nucleotides & Nucleic Acids
https://www.readbyqxmd.com/read/27905700/use-of-ozone-depleting-substances-direct-final-rule
#3
(no author information available yet)
The Food and Drug Administration (FDA, the Agency, or we) is amending its regulation on uses of ozone-depleting substances (ODSs), including chlorofluorocarbons (CFCs), to remove the designation for certain products as "essential uses" under the Clean Air Act. Essential-use products are exempt from the ban by FDA on the use of CFCs and other ODS propellants in FDA-regulated products and from the ban by the Environmental Protection Agency (EPA) on the use of ODSs in pressurized dispensers. The products that will no longer constitute an essential use are: Sterile aerosol talc administered intrapleurally by thoracoscopy for human use and metered-dose atropine sulfate aerosol human drugs administered by oral inhalation...
October 26, 2016: Federal Register
https://www.readbyqxmd.com/read/27892658/occupational-syncarcinogenesis-in-the-skin-combined-effects-of-two-carcinogens-from-the-german-occupational-disease-list
#4
Heinrich Dickel, Otto Blome, Beate Dickel, Thomas Bruckner, Eggert Stockfleth, Silas Paras Soemantri
BACKGROUND: Though scientifically undisputed, cutaneous syncarcinogenesis is not reflected in German occupational disease (OD) regulations, which tend to be guided by the tenet of monocausality. Recognition of nonmelanoma skin cancer (NMSC) and its precursor lesions as OD requires individual assessment as to whether the requirements pursuant to either OD 5103 (occupational exposure to natural UV radiation) or OD 5102 (occupational exposure to polycyclic aromatic hydrocarbons) are fulfilled...
November 28, 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27886116/simultaneous-ultra-performance-liquid-chromatography-determination-and-antioxidant-activity-of-linarin-luteolin-chlorogenic-acid-and-apigenin-in-different-parts-of-compositae-species
#5
Seung Hwan Hwang, Ji Hun Paek, Soon Sung Lim
Linarin (LA), luteolin (LE), chlorogenic acid (CA) and apigenin (AP) are four major flavonoids with various promising bioactivities found in Compositae (COP) species. A reliable, reproducible and accurate method for the simultaneous and quantitative determination of these four major flavonoids by Ultra Performance Liquid Chromatography (UPLC) analysis was developed. This method should be appropriate for the quality assurance of COP. The UPLC separation was carried out using an octadecylsilane (ODS) Hypersil (2...
November 23, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27866733/review-of-the-literature-articles-published-in-the-last-five-years-that-have-changed-my-daily-practice
#6
REVIEW
E Delmont
Over the last five years, the management of peripheral neuropathies has become structured by the publication of recognized diagnostic criteria for inflammatory neuropathies and the elaboration of a function score, the R-ODS, used to evaluate the progression of these neuropathies. The concept of nodo-paranodopathy has enriched the concept of peripheral neuropathies, over-riding the classical mechanisms of axonal and demyelinating mechanisms. The structures of the nodes of Ranvier, gangliosides, contractin and neurofascin are preferential targets for auto-antibodies responsible for dysimmune neuropathies...
December 2016: Revue Neurologique
https://www.readbyqxmd.com/read/27862093/bioanalytical-method-for-the-estimation-of-co-administered-esomeprazole-leflunomide-and-ibuprofen-in-human-plasma-and-in-pharmaceutical-dosage-forms-using-micellar-liquid-chromatography
#7
Wael Talaat
The present study represents a connection between basic science and clinical applied science through providing a bioanalytical method for the analysis of certain co-administered drugs used for the treatment of rheumatoid arthritis. The studied drugs are esomeprazole, leflunomide and ibuprofen. The proposed bioanalytical method is a simple reversed phase high performance liquid chromatographic method using micellar mobile phase. The method is conducted using a Shim-pack VP-ODS (150 mm × 4.6 mm ID) stainless steel column at ambient temperature with ultraviolet detection at 285 nm...
October 13, 2016: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/27858699/adolescent-lumbar-disc-herniation-impact-diagnosis-and-treatment
#8
Mustafa Karademir, Olcay Eser, Ergün Karavelioglu
BACKGROUND: Symptomatic lumbar intervertebral disc herniation (LDH) is rare in children and adolescents. To date, the treatments available for child and adolescent LDH, and the effect of each treatment, have not been fully reviewed. OBJECTIVE: The purpose of this retrospective study is to report the etiology, familial history, presenting symptoms, level of herniation, duration of symptoms, radiological findings, as well as treatment methods and outcome. METHODS: We retrospectively reviewed medical records of all patients with inclusion criteria of being younger than 20 years...
November 11, 2016: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/27856195/detection-of-dexmedetomidine-in-human-breast-milk-using-liquid-chromatography-tandem-mass-spectrometry-application-to-a-study-of-drug-safety-in-breastfeeding-after-cesarean-section
#9
Rika Nakanishi, Manabu Yoshimura, Manabu Suno, Kento Yamamoto, Haruka Ito, Yohei Uchimine, Takashi Toriumi, Atsushi Kurosawa, Ami Sugawara, Takayuki Kunisawa
Several analytical methods for dexmedetomidine (DEX) in human plasma have been published, but quantification of DEX in human breast milk has not been described. In this article, we describe a high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method suitable for quantification of DEX in human breast milk. DEX and an internal standard were extracted in a single liquid-liquid extraction step with diethyl ether from 200μL of human breast milk. HPLC was performed on a TSK-gel ODS-100V column with isocratic elution at a flow rate of 0...
November 10, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/27847791/major-pelvic-bleeding-following-a-stapled-transanal-rectal-resection-use-of-laparoscopy-as-a-diagnostic-tool
#10
Giovanni Domenico Tebala, Abdul Qayyum Khan, Sean Keane
Stapled transanal rectal resection (STARR) and stapled hemorrhoidopexy (SH) are well-established techniques for treating rectal prolapse and obstructed defecation syndrome (ODS). Occasionally, they can be associated with severe complications. We describe the case of a 59-year-old woman who underwent STARR for ODS and developed a postoperative pelvic hemorrhage. A computed tomography (CT) scan revealed a vast pelvic, retroperitoneal hematoma and free gas in the abdomen. Laparoscopy ruled out any bowel lesions, but identified a hematoma of the pelvis...
October 2016: Annals of Coloproctology
https://www.readbyqxmd.com/read/27829739/implant-based-overdenture-a-review-in-patient-perspective
#11
REVIEW
R Krishnaraj, R Murugan, N Krishna Meera, P Laksmipathy, C S Krishnan, I Packiaraj
A review in affected person's attitude in abstract care of edentulous patients has to be a priority in elderly individuals. The development of complete dentures (CDs) has been the selection of remedy retaining in mind the socioeconomic popularity, age, and nutritional elements. However, most of the patients complain of loss of retention in mandibular implant-supported overdentures (ODs), which compensated the downside of the loss of retention in complete dentures (CDs). Moreover, implant supported over dentures (ISOVDs) supplied accurate exceptional of lifestyles, esthetics, progressed nutritional deficiencies, and provided good patient satisfaction...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/27829613/quantification-of-triacylglycerol-positional-isomers-in-rat-milk
#12
Natsuko Watanabe, Toshiharu Nagai, Hoyo Mizobe, Kazuaki Yoshinaga, Akihiko Yoshida, Yohei Kitamura, Takashi Shimizu, Fumiaki Beppu, Naohiro Gotoh
The absolute amount of triacylglycerol (TAG) positional isomers was analyzed in rat milk fat, a representative of non-ruminant milk fat, using a HPLC-UV-atmospheric pressure chemical ionization-MS/MS system equipped with an octacosyl silylation column or polymeric ODS column. TAGs consisting of two oleic acids (O) and one palmitic acid (P) were the most abundant. In particular, β-OPO, a TAG binding P at the β-position (sn-2) and two Os at the α-positions (sn-1/3), was prominent. The β-OPO content decreased over time, while a TAG consisting of two Ps and one capric acid, a medium-chain fatty acid, increased...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27823624/antitumor-lignanamides-from-the-aerial-parts-of-corydalis-saxicola
#13
Bin Zhang, Rizhen Huang, Jing Hua, Hong Liang, Yingming Pan, Lumei Dai, Dong Liang, Hengshan Wang
BACKGROUND: Cancer is one of the leading cause of unnatural death globally. There is still a great need for effective anticancer agents from plant sources. Corydalis saxicola Bunting is a medicinal plant that is traditionally used to treat various diseases in southwest China. Previous phytochemical investigations of C. saxicola have focused on isoquinoline alkaloids that have been isolated, which have activity against anti-hepatitis B virus and inhibit DNA topoisomerase I. However, the exploration of other classes of constituents and their bioactivities needs further study...
December 1, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27795734/the-pharmacokinetics-bioavailability-and-excretion-of-bergapten-after-oral-and-intravenous-administration-in-rats-using-high-performance-liquid-chromatography-with-fluorescence-detection
#14
Xie-An Yu, John Teye Azietaku, Jin Li, Mingrui An, Jun He, Jia Hao, Jun Cao, Yan-Xu Chang
A sensitive, specific, reproducible and optimized high performance liquid chromatography with fluorescence detection (HPLC-FLD) method for the determination of bergapten in rat plasma was established and applied to the pharmacokinetic and bioavailability study in rat after oral and intravenous administration of bergapten. The method was also successfully applied to the excretion study of bergapten after an oral administration of bergapten at a dose of 15 mg kg(-1) to rats. The sample preparation was achieved using liquid-liquid extraction...
2016: Chemistry Central Journal
https://www.readbyqxmd.com/read/27794223/semi-preparative-hplc-separation-followed-by-hplc-uv-and-tandem-mass-spectrometric-analysis-of-phorbol-esters-in-jatropha-seed
#15
Santi Kongmany, Truong Thi Hoa, Le Thi Ngoc Hanh, Kiyoshi Imamura, Yasuaki Maeda, Luu Van Boi
Phorbol esters (PEs) are well known as the main toxic compounds in Jatropha curcas Linnaeus (JCL), the seed oil of which has been considered as a major feedstock for the production of biodiesel. In the present study, we investigated a series of PEs extracted from JCL seed kernels with methanol (MeOH), and identified more than seven components contained in the PEs. The isolation of main five components of a series of PEs was revised using a semi-preparative reversed phase HPLC analysis of ODS-3 column. The five peaks of components were successfully isolated, and peaks of J2, J3, J5, and J7 were assigned to be Jatropha factors C1, C2, C3, and C4/5, but J6 was a mixture of Jatropha factor C6 and its isomer based on the data of UV and LC-MS/MS, and J2 was identified using (1)H NMR analysis...
October 14, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/27793356/optical-coherence-tomography-reflective-drusen-substructures-predict-progression-to-geographic-atrophy-in-age-related-macular-degeneration
#16
Malini Veerappan, Abdul-Karim M El-Hage-Sleiman, Vincent Tai, Stephanie J Chiu, Katrina P Winter, Sandra S Stinnett, Thomas S Hwang, G Baker Hubbard, Michelle Michelson, Randall Gunther, Wai T Wong, Emily Y Chew, Cynthia A Toth
PURPOSE: Structural and compositional heterogeneity within drusen comprising lipids, carbohydrates, and proteins have been previously described. We sought to detect and define phenotypic patterns of drusen heterogeneity in the form of optical coherence tomography-reflective drusen substructures (ODS) and examine their associations with age-related macular degeneration (AMD)-related features and AMD progression. DESIGN: Retrospective analysis in a prospective study...
December 2016: Ophthalmology
https://www.readbyqxmd.com/read/27769478/simultaneous-separation-of-polar-and-non-polar-mixtures-by-capillary-hplc-based-on-an-ostadecylsilane-and-taurine-derivatized-silica-continuously-packed-column
#17
Yi Zhang, Yan Zhang, Guan Wang, Wujuan Chen, Pingang He, Qingjiang Wang
A capillary column was prepared by continuously packing ostadecylsilane (ODS) and taurine derivatized silica (TDS) in one column without interface. This continuously packing chromatography (CPC) column is easy to operate, has good stability and shows simultaneously separation of both polar and non-polar compounds. The simultaneous separation of a series of complex samples with highly hydrophobic components (benzene, toluene, ethylbenzene, and PAHs) and highly hydrophilic components (biogenic amines, bases and nucleosides) using this CPC method was investigated...
December 1, 2016: Talanta
https://www.readbyqxmd.com/read/27769393/simultaneous-profiling-of-eicosanoid-metabolome-in-plasma-by-uplc-ms-ms-method-application-to-identify-potential-makers-for-rheumatoid-arthritis
#18
Nannan Wang, Ronghua Dai, Weihui Wang, Yan Peng, Xiaoning Zhao, Kaishun Bi
To evaluate the potential relationship between rheumatoid arthritis and arachidonic acid (AA) metabonomics via cyclooxygenase (COX) and lipoxygenase (LOX) pathways, a UPLC-MS/MS method has been developed and validated for simultaneous and quantitative profiling of eicosanoid metabolome in rat plasma. The analytes were extracted from plasma samples by protein precipitation procedure, and then separated on a Shim-pack XR-ODS column with mobile phase A (0.05% formic acid in water, pH=3.3 adjusted with dilute ammonium hydroxide) and mobile phase B [methanol: acetonitrile (20:80, v/v)]...
December 1, 2016: Talanta
https://www.readbyqxmd.com/read/27765422/preparation-and-characterization-of-monodisperse-large-porous-silica-microspheres-as-the-matrix-for-protein-separation
#19
Hongjun Xia, Guangping Wan, Junlong Zhao, Jiawei Liu, Quan Bai
High performance liquid chromatography (HPLC) is a kind of efficient separation technology and has been used widely in many fields. Micro-sized porous silica microspheres as the most popular matrix have been used for fast separation and analysis in HPLC. In this paper, the monodisperse large-porous silica microspheres with controllable size and structure were successfully synthesized with polymer microspheres as the templates and characterized. First, the poly(glycidyl methacrylate-co-ethyleneglycol dimethacrylate) microspheres (PGMA-EDMA) were functionalized with tetraethylenepentamine (TEPA) to generate amino groups which act as a catalyst in hydrolysis of tetraethyl orthosilicate (TEOS) to form Si-containing low molecular weight species...
October 13, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27742925/-transtar%C3%A2-operation-for-rectocele-and-obstructed-defecation-syndrome
#20
C Isbert
The Contour® Transtar™ operation represents a further methodological development of conventional transanal stapled rectal resection (STARR) for the treatment of obstructed defecation syndrome (ODS) and/or full thickness rectal prolapse. In contrast to the conventional STARR technique a specially designed single curved stapler is used with which the rectal wall is incised in a circular fashion and anastomosed. This results in a monoblock resection with almost unlimited extent of resection. In multicenter studies the procedure has generally been shown to be effective for treatment of ODS with intussusception and rectocele...
October 14, 2016: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
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