keyword
MENU ▼
Read by QxMD icon Read
search

Ldr

keyword
https://www.readbyqxmd.com/read/29145160/larval-development-ratio-test-with-the-calanoid-copepod-acartia-tonsa-as-a-new-bioassay-to-assess-marine-sediment-quality
#1
Isabella Buttino, Valentina Vitiello, Simona Macchia, Alice Scuderi, David Pellegrini
The copepod Acartia tonsa was used as a model species to assess marine sediment quality. Acute and chronic bioassays, such as larval development ratio (LDR) and different end-points were evaluated. As a pelagic species, A. tonsa is mainly exposed to water-soluble toxicants and bioassays are commonly performed in seawater. However, an interaction among A. tonsa eggs and the first larval stages with marine sediments might occur in shallow water environments. Here we tested two different LDR protocols by incubating A...
November 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29140462/data-portal-for-the-library-of-integrated-network-based-cellular-signatures-lincs-program-integrated-access-to-diverse-large-scale-cellular-perturbation-response-data
#2
Amar Koleti, Raymond Terryn, Vasileios Stathias, Caty Chung, Daniel J Cooper, John P Turner, Dušica Vidovic, Michele Forlin, Tanya T Kelley, Alessandro D'Urso, Bryce K Allen, Denis Torre, Kathleen M Jagodnik, Lily Wang, Sherry L Jenkins, Christopher Mader, Wen Niu, Mehdi Fazel, Naim Mahi, Marcin Pilarczyk, Nicholas Clark, Behrouz Shamsaei, Jarek Meller, Juozas Vasiliauskas, John Reichard, Mario Medvedovic, Avi Ma'ayan, Ajay Pillai, Stephan C Schürer
The Library of Integrated Network-based Cellular Signatures (LINCS) program is a national consortium funded by the NIH to generate a diverse and extensive reference library of cell-based perturbation-response signatures, along with novel data analytics tools to improve our understanding of human diseases at the systems level. In contrast to other large-scale data generation efforts, LINCS Data and Signature Generation Centers (DSGCs) employ a wide range of assay technologies cataloging diverse cellular responses...
November 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29138841/enhanced-activated-t%C3%A2-cell-subsets-in-prostate-cancer-patients-receiving-iodine-125-low-dose-rate-prostate-brachytherapy
#3
Makoto Kubo, Takefumi Satoh, Hiromichi Ishiyama, Ken-Ichi Tabata, Hideyasu Tsumura, Shoko Komori, Masatsugu Iwamura, Shiro Baba, Kazushige Hayakawa, Toshihiko Kawamura, Fumiya Obata
Radiotherapy (RT) is one of the most important treatments for prostate cancer. Although RT can kill cancer cells through direct and indirect effects of radiation, it occasionally induces an abscopal effect whereby localized radiation treatment is associated with elimination of metastatic cancer at a distance from the irradiated area. Thus, RT may induce an effective antitumor immune response, although the mechanism involved has remained unclear. The present was designed to evaluate this effect of RT in 36 patients with prostate cancer who provided informed consent prior to enrollment in this clinical trial...
November 13, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29136875/a-turn-on-competitive-immunochromatographic-strips-integrated-with-quantum-dots-and-gold-nano-stars-for-cadmium-ion-detection
#4
Meng Xiao, Qiangqiang Fu, Haicong Shen, Yuan Chen, Wei Xiao, Daoguang Yan, Xiaojiang Tang, Zhiyong Zhong, Yong Tang
Immunochromatographic strips (ICSs) are inexpensive, simple, portable, and robust, and therefore have many uses in the medicinal, agricultural, and environmental industries. For detection of small molecules, current ICSs are competitive format (competitive ICSs, CICSs), which only offer a turn-off readout mode, and therefore lead to low sensitivity when evaluating results by the naked eye. To overcome this problem, we report a turn-on CICSs that relies on the ability of gold nano-stars (AuNSs) quenching the signal of quantum dots (QDs)...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136817/rapid-quantification-of-persulfate-in-aqueous-systems-using-a-modified-hplc-unit
#5
Abbas Baalbaki, Nagham Zein Eddine, Saly Jaber, Maya Amasha, Antoine Ghauch
Existing analytical techniques used for the quantification of persulfate (PS) in water mostly rely on polarography, reductometry or spectrophotometry. Although acceptable to a certain extent, these methods did not satisfy environmental chemists seeking rapid, reproducible and accurate quantification of PS upon the application of ISCO and AOPs technologies. Accordingly, a novel flow injection/spectroscopy analytical technique is developed via the use of an HPLC coupled to bypass capillary columns and a DAD detector...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29128827/a-comparison-study-on-a-sulfonated-graphene-polyaniline-nanocomposite-coated-fiber-for-analysis-of-nicotine-in-solid-samples-through-the-traditional-and-vacuum-assisted-hs-spme
#6
Alireza Ghiasvand, Samira Koonani, Fatemeh Yazdankhah, Saeid Farhadi
A simple, rapid, and reliable headspace solid-phase microextraction (HS-SPME) procedure, reinforced by applying vacuum in the extraction vial, was developed. It was applied for the extraction of nicotine in solid samples prior to determination by gas chromatography-flame ionization detection (GC-FID). First, the surface of a narrow stainless steel wire was made porous and adhesive by platinization to obtain a durable, higher surface area, and resistant fiber. Then, a thin film of sulfonated graphene/polyaniline (Sulf-G/PANI) nanocomposite was synthesized and simultaneously coated on the platinized fiber using the electrophoretic deposition (EPD) method...
November 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29128291/detection-of-snps-of-t2dm-susceptibility-genes-by-a-ligase-detection-reaction-fluorescent-nanosphere-technique
#7
Yan Chen, Ying Zhao, Yan-Bo Li, Yan-Jun Wang, Gui-Zhen Zhang
OBJECTIVE: To establish a high throughput, low cost, and simple nanotechnology-based method for the detection of single nucleotide polymorphism (SNP) loci in type 2 diabetes mellitus (T2DM). METHODS: Multiplex ligase detection reaction (LDR) amplification was performed using fluorescently labeled magnetic nanosphere-bound upstream LDR probes and downstream probes labeled with a unique fluorescent group for each SNP locus. The amplified LDR products were separated by magnetic nanospheres and then scanned by fluorescence spectroscopy...
November 9, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29127795/an-investigation-of-the-leaf-retention-capacity-efficiency-and-mechanism-for-atmospheric-particulate-matter-of-five-greening-tree-species-in-beijing-china
#8
Jinqiang Liu, Zhiguo Cao, Songyan Zou, Huanhuan Liu, Xiao Hai, Shihua Wang, Jie Duan, Benye Xi, Guangxuan Yan, Shaowei Zhang, Zhongkui Jia
Urban trees have the potential to reduce air pollution, but the retention capacity and efficiency of different tree species for atmospheric particulate matter (PM) accumulation and the underlying mechanism hasn't been well understood. To select tree species with high air purification abilities, the supplementing ultrasonic cleaning (UC) procedure was first introduced into the conventional leaf cleaning methods [single water cleaning (WC) or plus brush cleaning (BC)] for eluting the leaf-retained PM. Further updates to the methodology were applied to investigate the retention capacity, efficiency, and mechanism for PM of five typical greening tree species in Beijing, China...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29072195/evaluation-of-water-mimicking-solid-phantom-materials-for-use-in-hdr-and-ldr-brachytherapy-dosimetry
#9
Andreas Alexander Schoenfeld, Maike Thieben, Dietrich Harder, Bjoern Poppe, Ndimofor Chofor
In modern HDR or LDR brachytherapy with photon emitters, fast checks of the dose profiles generated in water or a water-equivalent phantom have to be available in the interest of patient safety. However, the commercially available brachytherapy photon sources cover a wide range of photon emission spectra, and the range of the in-phantom photon spectrum is further widened by Compton scattering, so that the achievement of water-mimicking properties of such phantoms involves high requirements on their atomic composition...
October 26, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29060926/programmed-death-1-lignd-1-gene-rs2890658-polymorphism-associated-with-the-risk-of-esophageal-squamous-cell-carcinoma-in-smokers
#10
Rong-Miao Zhou, Yan Li, Jiang-Hui Liu, Na Wang, Xi Huang, Shi-Ru Cao, Bao-En Shan
BACKGROUND: The most important anti-tumor immune response is mediated by T lymphocytes. The interaction of programmed death-1 lignd-1 (PD-L1) with its receptor provides an inhibitory signal in T lymphocytes activation and proliferation. OBJECTIVE: This study aimed to investigate whether polymorphisms of PD-L1 were associated with the risk and prognosis of esophageal squamous cell carcinoma (ESCC) in a high-incidence population from Northern China. METHODS: PD-L1 rs2890658 A/C and rs4143815 C/G single nucleotide polymorphisms (SNPs) were genotyped by polymerase chain reaction ligase detection reaction (PCR-LDR) method in 575 ESCC patients and 577 healthy controls...
October 9, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/29037837/the-correlation-between-xiap-gene-polymorphisms-and-esophageal-squamous-cell-carcinoma-susceptibility-and-prognosis-in-a-chinese-population
#11
Hai Peng, Li-Guo Wang, Xue-Zhi Wang, Ai-Jun Liu
OBJECTIVE: This study aims to explore the correlation between X-linked inhibitor of apoptosis protein (XIAP) gene polymorphisms (rs8371 and rs9856) with the susceptibility and prognosis of esophageal squamous cell carcinoma (ESCC), providing a potential treatment for ESCC. METHOD: A total of 170 ESCC patients (case group) and 191 healthy people (control group) were enrolled in our study. Genotyping was conducted on the basis of the ligase detection reaction (LDR)...
October 9, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29032014/high-intermediate-prostate-cancer-treated-with-low-dose-rate-brachytherapy-with-or-without-androgen-deprivation-therapy
#12
Tom Pickles, W James Morris, Mira Keyes
PURPOSE: To describe outcomes of men with unfavorable (high-tier) intermediate risk prostate cancer (H-IR) treated with low-dose-rate (LDR) brachytherapy, with or without 6 months of androgen deprivation therapy (ADT). METHODS AND MATERIALS: Patients with H-IR prostate cancer, treated before 2012 with LDR brachytherapy without external radiation are included. Baseline tumor characteristics are described. Outcomes between groups receiving ADT are measured by Phoenix (nadir +2 ng/mL), and threshold 0...
October 11, 2017: Brachytherapy
https://www.readbyqxmd.com/read/29028539/electrospun-polycaprolactam-manganese-oxide-fiber-for-headspace-solid-phase-microextraction-of-phthalate-esters-in-water-samples
#13
Niloufar Eskandarpour, Hassan Sereshti
The nanofibrous polycaprolactam (polyamide 6 (PA6)) incorporated with manganese oxide (MnO) nanoparticles was fabricated by electrospinning and used as a new fiber coating for headspace-solid phase microextraction (HS-SPME) of the selected phthalate esters (PEs) in water samples prior to GC-μECD. The adsorbent was fully characterized using scanning electron microscopy (SEM), Fourier transform-infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). The main parameters that affect the HS-SPME efficiency such as extraction temperature, ionic strength, extraction and desorption times were investigated...
October 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/29025280/effects-of-prenatal-ppar-%C3%AE-agonist-rosiglitazone-exposure-on-rat-hippocampus-development-in-a-time-dependent-manner-a-stereological-and-histopathological-study
#14
D Sağır, B Eren, B D Yılmaz, Z Eren, O N Keleş, A B Gökçe
Rosiglitazone is in the thiazolidinedione class of drugs used in the treatment of type 2 diabetes mellitus. It works as an insulin sensitizer by binding to the peroxisome proliferator-activated receptor gamma. We investigated the effects of prenatally administered rosiglitazone on pyramidal cell numbers and morphologies in the hippocampus at postnatal period using histochemical and stereological techniques, congenital morphological properties and the number of offspring in rats. Eighteen female rats were grouped into control (C), low-dose rosiglitazone (LDR) and high-dose rosiglitazone (HDR)...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28988651/association-between-polymorphism-of-smad3-gene-and-risk-of-sporadic-intracranial-arterial-aneurysms-in-the-chinese-han-population
#15
Mao-Fan Liao, Qiu-Wen Gong, Liang Liu, Xiao-Yi Xiong, Qin Zhang, Chang-Xiong Gong, Qing-Wu Yang
Intracranial arterial aneurysms (IAAs) are locally abnormal dilations of the cerebral arteries and often result in subarachnoid hemorrhages (SAH). Genetic, molecular and cellular mechanisms of sporadic IAAs forms are poorly understood. In this study, we investigate the association between mothers against decapentaplegic homolog 3 (SMAD3) genotypes and the risk of sporadic intracranial arterial aneurysms among the Chinese Han population. A case-control study was conducted examining 330 IAA patients and 313 controls...
October 5, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28964986/phage-therapy-as-an-alternative-or-complementary-strategy-to-prevent-and-control-biofilm-related-infections
#16
REVIEW
D P Pires, Ldr Melo, D Vilas Boas, S Sillankorva, J Azeredo
The complex heterogeneous structure of biofilms confers to bacteria an important survival strategy. Biofilms are frequently involved in many chronic infections in consequence of their low susceptibility to antibiotics as well as resistance to host defences. The increasing need of novel and effective treatments to target these complex structures has led to a growing interest on bacteriophages (phages) as a strategy for biofilm control and prevention. Phages can be used alone, as a cocktail to broaden the spectra of activity, or in combination with other antimicrobials to improve their efficacy...
September 28, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/28964727/semiconductor-real-time-quality-assurance-dosimetry-in-brachytherapy
#17
REVIEW
Mauro Carrara, Dean Cutajar, Saree Alnaghy, Anthony Espinoza, Anna Romanyukha, Stefano Presilla, Chiara Tenconi, Annamaria Cerrotta, Carlo Fallai, Mitra Safavi-Naeini, Marco Petasecca, Alannah Kejda, Michael Lerch, Stéphanie Corde, Michael Jackson, Andrew Howie, Joseph Bucci, Anatoly B Rosenfeld
With the increase in complexity of brachytherapy treatments, there has been a demand for the development of sophisticated devices for delivery verification. The Centre for Medical Radiation Physics (CMRP), University of Wollongong, has demonstrated the applicability of semiconductor devices to provide cost-effective real-time quality assurance for a wide range of brachytherapy treatment modalities. Semiconductor devices have shown great promise to the future of pretreatment and in vivo quality assurance in a wide range of brachytherapy treatments, from high-dose-rate (HDR) prostate procedures to eye plaque treatments...
September 27, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28951748/is-intraoperative-real-time-dosimetry-in-prostate-seed-brachytherapy-predictive-of-biochemical-outcome
#18
Daniel Taussky, Levon Igidbashian, David Donath, Dominic Béliveau-Nadeauv, Renée X Larouche, Yanick Hervieux, Guila Delouya
PURPOSE: To analyze intraoperative (IO) dosimetry using transrectal ultrasound (TRUS), performed before and after prostate low-dose-rate brachytherapy (LDR-BT), and compare it to dosimetry performed 30 days following the LDR-BT implant (Day 30). MATERIAL AND METHODS: A total of 236 patients underwent prostate LDR-BT using (125)I that was performed with a three-dimensional TRUS-guided interactive inverse preplanning system (preimplant dosimetry). After the implant procedure, the TRUS was repeated in the operating room, and the dosimetry was recalculated (postimplant dosimetry) and compared to dosimetry on Day 30 computed tomography (CT) scans...
August 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28938019/fabrication-of-3-methoxyphenol-sensor-based-on-fe3o4-decorated-carbon-nanotube-nanocomposites-for-environmental-safety-real-sample-analyses
#19
Mohammed M Rahman, Mohammad Musarraf Hussain, Abdullah M Asiri
Iron oxide ornamented carbon nanotube nanocomposites (Fe3O4.CNT NCs) were prepared by a wet-chemical process in basic means. The optical, morphological, and structural characterizations of Fe3O4.CNT NCs were performed using FTIR, UV/Vis., FESEM, TEM; XEDS, XPS, and XRD respectively. Flat GCE had been fabricated with a thin-layer of NCs using a coating binding agent. It was performed for the chemical sensor development by a dependable I-V technique. Among all interfering analytes, 3-methoxyphenol (3-MP) was selective towards the fabricated sensor...
2017: PloS One
https://www.readbyqxmd.com/read/28927538/advances-in-ligase-chain-reaction-and-ligation-based-amplifications-for-genotyping-assays-detection-and-applications
#20
REVIEW
Abdullah A Gibriel, Ola Adel
Genetic variants have been reported to cause several genetic diseases. Various genotyping assays have been developed for diagnostic and screening purposes but with certain limitations in sensitivity, specificity, cost effectiveness and/or time savings. Since the discovery of ligase chain reaction (LCR) in the late nineties, it became one of the most favored platforms for detecting these variants and also for genotyping low abundant contaminants. Recent and powerful modifications with the integration of various detection strategies such as electrochemical and magnetic biosensors, nanoparticles (NPs), quantum dots, quartz crystal and leaky surface acoustic surface biosensors, DNAzyme, rolling circle amplification (RCA), strand displacement amplification (SDA), surface enhanced raman scattering (SERS), chemiluminescence and fluorescence resonance energy transfer have been introduced to both LCR and ligation based amplifications to enable high-throughput and inexpensive multiplex genotyping with improved robustness, simplicity, sensitivity and specificity...
July 2017: Mutation Research
keyword
keyword
16098
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"