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https://www.readbyqxmd.com/read/29906094/capacitive-model-for-coulometric-readout-of-ion-selective-electrodes
#1
Zdenka Jarolimova, Tingting Han, Ulriika Mattinen, Johan Bobacka, Eric Bakker
We present here a capacitive model for the coulometric signal transduction readout of solid-contact ion-selective membrane electrodes (SC-ISE) with a conducting polymer (CP) as an intermediate layer for the detection of anions. The capacitive model correlates well with experimental data obtained for chloride-selective SC-ISE utilizing poly(3,4-ethylenedioxythiophene) (PEDOT) doped with chloride as the ion-to-electron transducer. Additionally, Prussian blue is used as a simple sodium capacitor to further demonstrate the role of the transduction layer...
June 15, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29905360/-the-microbiome-the-unscheduled-parameter-for-future-therapies
#2
Achim G Beule
The microbiome is defined as the total of cellular microorganisms of baczerial, viral or e. g., parasite origin living on the surface of a body. Within the anatomical areas of otorhinolaryngology, a significant divergence and variance can be demonstrated. For ear, nose, throat, larynx and cutis different interactions of microbiome and common factors like age, diet and live style factors (e. g., smoking) have been detected in recent years. Besides, new insights hint at a passible pathognomic role of the microbiome towards diseases in the ENT area...
March 2018: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/29905356/-biologics-in-rhinology-forthcoming-personalized-concepts-the-future-starts-today
#3
Adam M Chaker
Sinunasale Erkrankungen zählen mit zu den häufigsten chronischen Erkrankungen und führen zu einer erheblichen Störung der Lebensqualität, ein komorbides Asthma ist häufig. Trotz leitliniengerechter Therapie ist anzunehmen, dass mind. 20% der Patienten ihre Erkrankungssymptome nicht adäquat kontrollieren können. Neben den etablierten chirurgischen und konservativen Therapieoptionen finden sich nun vielversprechende Therapieansätze, die bspw. mittels therapeutischer Antikörper mechanistisch gezielt in die Pathophysiologie der Erkrankungen eingreifen können...
March 2018: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/29899333/glaucocalyxin-a-exerts-anticancer-effect-on-osteosarcoma-by-inhibiting-gli1-nuclear-translocation-via-regulating-pi3k-akt-pathway
#4
Jianwei Zhu, Yang Sun, Ying Lu, Xiubo Jiang, Bo Ma, Lisha Yu, Jie Zhang, Xiaochen Dong, Qi Zhang
Osteosarcoma, the most common malignant bone tumor with recurring disease or lung metastases, has become one of the leading causes of death in humans. In the current study, we made an investigation on the anticancer effect of glaucocalyxin A, a bioactive ent-kauranoid diterpenoid isolated from Rabdosia japonica var., and unraveled the underlying mechanisms. Here, we found that Glaucocalyxin A inhibited the cell viability of numerous osteosarcoma cells. Our results showed that Glaucocalyxin A exerted the pro-apoptotic effect on human osteosarcoma cells, MG-63 and HOS cells...
June 13, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29895493/isodon-eriocalyx-and-its-bioactive-component-eriocalyxin-b-enhance-cytotoxic-and-apoptotic-effects-of-gemcitabine-in-pancreatic-cancer
#5
L Li, S L Zhao, G G L Yue, T P Wong, J X Pu, H D Sun, K P Fung, P C Leung, Q B Han, C B S Lau, P S Leung
BACKGROUND: Pancreatic cancer, associated with poor prognosis and low survival rate, has been the fourth leading cause of cancer-related death in the US. Although gemcitabine (Gem) is the first-line chemotherapeutic drug in the management of pancreatic cancer, the median survival extension is only 1.5 months, indicating unsatisfactory clinical results. Therefore, exploring agents that can enhance the anti-cancer activity of Gem would be an attractive strategy. PURPOSE: Our previous studies have demonstrated that eriocalyxin b (EriB), an ent‑kaurane diterpenoid isolated from Isodon eriocalyx (Dunn...
May 15, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/29890361/nitric-oxide-inhibitory-constituents-from-siegesbeckia-pubescens
#6
Hari Jang, Jin Woo Lee, Jun Gu Kim, Hye Ryoung Hong, Thi Phoung Linh Le, Jin Tae Hong, Youngsoo Kim, Mi Kyeong Lee, Bang Yeon Hwang
Two new sesquiterpenoids (1 and 2) and a new ent-pimarane type diterpenoid (3), together with eighteen known compounds (4-21), were isolated from the whole plants of Siegesbeckia pubescens. The structures of the new compounds were determined on the basis of 1D-, 2D NMR and HRESIMS data. All compounds were evaluated for their inhibitory effects on LPS-induced nitric oxide production in RAW 264.7 macrophages. Of these, highly oxygenated germacrane type sesquiterpenoids (1-2 and 13-14) showed significant inhibitory effects with IC50 values ranging from 3...
May 23, 2018: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29889557/a-silica-gel-orthogonal-high-performance-liquid-chromatography-method-for-the-analyses-of-steviol-glycosides-novel-tetra-glucopyranosyl-steviol
#7
Wilmer H Perera, Taylor Ramsaroop, Raquel Carvalho, Douglas L Rodenburg, James D McChesney
A silica gel orthogonal method using acetonitrile: water was developed for the analyses of fractions rich in very polar steviol glycosides and resolve regions of co-elution of these compounds in reversed-phase. Additionally, we also used this normal phase analytical method to scale up the purification process of steviol glycosides. Using these approaches, one novel minor tetra-glucopyranosyl diterpene glycosides together with three known compounds were purified from a commercial Stevia rebaudiana leaf extract...
June 11, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29888688/intratympanic-gadolinium-magnetic-resonance-imaging-supports-the-role-of-endolymphatic-hydrops-in-the-pathogenesis-of-immune-mediated-inner-ear-disease
#8
D Lobo, M Tuñón, I Villarreal, B Brea, J R García-Berrocal
OBJECTIVE: To evaluate the presence of endolymphatic hydrops in patients with immune-mediated inner-ear disease. METHODS: The presence of endolymphatic hydrops was prospectively evaluated in 17 patients clinically diagnosed with secondary (n = 5) or primary (n = 12) immune-mediated inner-ear disease, who attended the ENT department of a tertiary care centre for evaluation or treatment over the previous year. All patients underwent magnetic resonance imaging of the temporal bone...
June 11, 2018: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/29888684/eosinophilic-granulomatosis-with-polyangiitis-and-laryngeal-involvement-review-of-the-literature-and-a-cross-sectional-prospective-experience
#9
V Seccia, L Cristofani-Mencacci, I Dallan, S Fortunato, M L Bartoli, S Sellari-Franceschini, M Latorre, P L Paggiaro, C Baldini
BACKGROUND: Eosinophilic granulomatosis with polyangiitis and granulomatosis with polyangiitis show variable otorhinolaryngological involvement. Up to 14 per cent of granulomatosis with polyangiitis patients have subglottis involvement; little is known about the laryngeal involvement in eosinophilic granulomatosis with polyangiitis. METHOD: A literature review was conducted, together with a prospective cross-sectional analysis of 43 eosinophilic granulomatosis with polyangiitis patients...
June 11, 2018: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/29885640/ent-copalic-acid-antibacterial-and-anti-biofilm-properties-against-actinomyces-naeslundii-and-peptostreptococcus-anaerobius
#10
Maria Gorete Mendes de Souza, Luís Fernando Leandro, Thaís da Silva Moraes, Fariza Abrão, Rodrigo Cassio Sola Veneziani, Sergio Ricardo Ambrosio, Carlos Henrique Gomes Martins
Diterpenes are an important class of plant metabolites that can be used in the search for new antibacterial agents. ent-Copalic acid (CA), the major diterpene in Copaifera species exudates, displays several pharmacological properties. This study evaluates the CA antibacterial potential against the anaerobic bacteria Peptostreptococcus anaerobius and Actinomyces naeslundii. Antimicrobial assays included time-kill and biofilm inhibition and eradication assays. Time-kill assays conducted for CA concentrations between 6...
May 28, 2018: Anaerobe
https://www.readbyqxmd.com/read/29875947/-toxidermy-mimicking-acute-chemotherapy-induced-lupus-erythematosus
#11
Saoussane Kharmoum, Meryem Soughi
Acute chemotherapy-induced lupus erythematosus (ALE) is rare. A few cases have been reported in the literature criminalizing capecitabine, paclitaxel and docetaxel. We report the case of a 64-year old female patient without a history of autoimmune diseases or of drug allergy followed up for invasive ductal carcinoma in the right breast immediately metastatized to the liver and to the lymph nodes. After AC60 first line chemotherapy regimen (a total of 6 cycles), she was treated with docetaxel at a dose of 100 mg/m2 ...
2018: Pan African Medical Journal
https://www.readbyqxmd.com/read/29875256/-probing-the-specificity-of-cyp112-in-bacterial-gibberellin-biosynthesis
#12
Raimund Nagel, Reuben J Peters
Biosynthesis of the gibberellin A (GA) plant hormones evolved independently in plant-associated fungi and bacteria. While the relevant enzymes have distinct evolutionary origins, the pathways proceed via highly similar reactions. One particularly complex transformation involves combined demethylation and λ-lactone ring formation, catalyzed in bacteria by the cytochrome P450 CYP112 in three individual steps, which involves large structural changes in the transition from substrate to product, with further divergence in the recently demonstrated use of two separate mechanistic routes...
June 6, 2018: Biochemical Journal
https://www.readbyqxmd.com/read/29873248/isoscoparins-r-and-s-two-new-ent-clerodane-diterpenoids-from-isodon-scoparius
#13
Xing-Ren Li, Qiang Fu, Min Zhou, Kun Hu, Xue Du, Xiao-Nian Li, Han-Dong Sun, Jian-Bo Yue, Hong-Bin Zhang, Pema-Tenzin Puno
Two new ent-clerodane diterpenoids, named isoscoparins R and S (1 and 2), were isolated from the aerial parts of Isodon scoparius. Their structures were characterized mainly by analyzing the NMR and HRESIMS data, and the relative configuration of compound 1 was determined by single-crystal X-ray diffraction. Compound 2 showed weak activity as an autophagic inhibitor.
June 6, 2018: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/29873213/-etiological-characteristics-analysis-of-3-137-outpatients-with-vertigo-or-dizziness-in-ent-department
#14
X L Zhang, M J Zhang, D L Liu, Q F Zhang
Objective: To analyze the etiological characteristics of patients in department of ENT with chief complaint of vertigo or dizziness in order to reduce the rate of misdiagnosis and wrong treatment. Method: A total of 3 137 patients in department of ENT with chief complaint of vertigo or dizziness from Sep 2015 to Sep 2017 were included and the etiologies were clarified retrospectively. And in which with any of the 8 kinds of disease including benign paroxysmal positional vertigo(BPPV), vestibular neuritis, vestibular migraine (VM), Meiniére disease, recurrent vestibular disease, sudden deafness with vertigo, psychogenic vertigo, posterior circulation ischemia (PCI) together 2 138 patients were further stratified analyzed by gender and age...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29873209/-retrospective-analysis-of-760-laryngeal-squamous-cell-carcinoma-patients-treated-with-open-laryngeal-function-preserving-operations
#15
L Tao, L Zhou, H T Wu, X M Li, X L Chen, C Li, M Xie, M Zhang, L Cheng, D Tang
Objective: To explore the fundamental clinical characteristics and survival prognostic factors of laryngeal squamous cell carcinoma (LSCC) patients treated with open laryngeal function-preserving operations. Method: The collected clinical data and the follow-up survival information from 760 patients with LSCC undergoing open laryngeal function-preserving operations between January 2005 and December 2010 in Eye & ENT Hospital of Fudan University were retrospectively analyzed. Kaplan-Meier was applied to calculate survival rates...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29872993/medically-unexplained-oropharyngeal-dysphagia-at-the-university-hospital-ent-outpatient-clinic-for-dysphagia-a-cross-sectional-cohort-study
#16
Rob J C G Verdonschot, Laura W J Baijens, Sophie Vanbelle, Michelle Florie, Remco Dijkman, Irene P M Leeters, Bernd Kremer, Carsten Leue
Medically unexplained oropharyngeal dysphagia (MUNOD) is a rare condition. It presents without demonstrable abnormalities in the anatomy of the upper aero-digestive tract and/or swallowing physiology. This study investigates whether MUNOD is related to affective or other psychiatric conditions. The study included patients with dysphagic complaints who had no detectible structural or physiological abnormalities upon swallowing examination. Patients with any underlying disease or disorder that could explain the oropharyngeal dysphagia were excluded...
June 5, 2018: Dysphagia
https://www.readbyqxmd.com/read/29869745/probe-versus-microscope-a-comparison-of-different-methods-for-image-to-patient-registration
#17
Martina Perwög, Zoltan Bardosi, Georgi Diakov, Olivia Jeleff, Florian Kral, Wolfgang Freysinger
PURPOSE: Computer-aided navigation is widely used in ENT surgery. The position of a surgical instrument is shown in the CT/MR images of the patient and can thus be a good support for the surgeon. The accuracy is highly dependent on the registration done prior to surgery. A microscope and a probe can both be used for registration and navigation, depending on the surgical intervention. A navigation system typically only reports the fiducial registration error after paired-point registration...
June 5, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29869513/-the-relationship-between-cervicovaginal-and-oral-hpv-infection
#18
M Nipčová, J Sláma, T Podlešák, H Neumannová, M Zikán, B Sehnal
OBJECTIVE: To summarize current knowledge of the relationship of genital and oral HPV infection in women. DESIGN: Review article. SETTING: Gynecologic Oncology Center, Department of Gynecology and Obstetrics, Hospital Na Bulovce and 1st Medical School of Charles University, Prague; Gynecologic Oncology Center, Department of Gynecology and Obstetrics, General Faculty Hospital and 1st Medical School of Charles University, Prague; ENT Department, Hospital Na Bulovce, Prague...
2018: Ceská Gynekologie
https://www.readbyqxmd.com/read/29866738/preoperative-refraction-age-and-optical-zone-as-predictors-of-optical-and-visual-quality-after-advanced-surface-ablation-in-patients-with-high-myopia-a-cross-sectional-study
#19
Jiaqi Zhou, Ye Xu, Meiyan Li, Michael C Knorz, Xingtao Zhou
OBJECTIVE: To investigate the factors associated with optical and visual quality of advanced surface ablation in high myopia. DESIGN: A cross-sectional study of high myopic eyes treated with laser epithelial keratomileusis (LASEK)/epipolis laser in situ keratomileusis (Epi-LASIK). SETTING6: Eye and ENT Hospital of Fudan University in Shanghai. METHODS: One hundred and thirty-eight high myopic eyes (138 patients) (myopia -6 D or more) were examined more than 12 months after LASEK or Epi-LASIK with advanced surface ablation on the MEL 80 excimer laser (Zeiss AG, Jena, Germany)...
June 4, 2018: BMJ Open
https://www.readbyqxmd.com/read/29863070/absolute-structures-of-wedelolide-derivatives-and-structure-activity-relationships-of-protein-tyrosine-phosphatase-1b-inhibitory-ent-kaurene-diterpenes-from-aerial-parts-of-wedelia-spp-collected-in-indonesia-and-japan
#20
Delfly Booby Abdjul, Hiroyuki Yamazaki, Syu-Ichi Kanno, Ryota Kirikoshi, Ayako Tomizawa, Ohgi Takahashi, Wilmar Maarisit, Fitje Losung, Henki Rotinsulu, Defny Silvia Wewengkang, Deiske Adeliene Sumilat, Magie Melanie Kapojos, Michio Namikoshi
Two sesquiterpene lactones with the (9R)-eudesman-9,12-olide framework, wedelolides I and J, have been isolated together with five eudesmanolide sesquiterpenes and twelve ent-kaurene diterpenes from the aerial parts of Indonesian Wedelia prostrata. The absolute configurations of wedelolides I and J, proposed in the previous communication, were proven by comparing their experimental Electronic Circular Dichroism (ECD) spectra with the calculated ECD spectrum of wedelolide I. The phytochemical study on the aerial parts of Okinawan Wedelia chinensis led to the isolation of three other eudesmanolide sesquiterpenes in addition to the three sesquiterpenes and eleven diterpenes isolated from the Indonesian W...
2018: Chemical & Pharmaceutical Bulletin
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