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Thermal Imaging

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https://www.readbyqxmd.com/read/29158848/biodegradable-core-shell-dual-metal-organic-frameworks-nanotheranostic-agent-for-multiple-imaging-guided-combination-cancer-therapy
#1
Dongdong Wang, Jiajia Zhou, Ruohong Shi, Huihui Wu, Ruhui Chen, Beichen Duan, Guoliang Xia, Pengping Xu, Hui Wang, Shu Zhou, Chengming Wang, Haibao Wang, Zhen Guo, Qianwang Chen
Metal-organic-frameworks (MOFs) possess high porosity, large surface area, and tunable functionality are promising candidates for synchronous diagnosis and therapy in cancer treatment. Although large number of MOFs has been discovered, conventional MOF-based nanoplatforms are mainly limited to the sole MOF source with sole functionality. In this study, surfactant modified Prussian blue (PB) core coated by compact ZIF-8 shell (core-shell dual-MOFs, CSD-MOFs) has been reported through a versatile stepwise approach...
2017: Theranostics
https://www.readbyqxmd.com/read/29158812/enhanced-radiotherapy-using-bismuth-sulfide-nanoagents-combined-with-photo-thermal-treatment
#2
Xiaju Cheng, Yuan Yong, Yiheng Dai, Xin Song, Gang Yang, Yue Pan, Cuicui Ge
Nanotechniques that can improve the effectiveness of radiotherapy (RT) by integrating it with multimodal imaging are highly desirable. Results In this study, we fabricated Bi2S3 nanorods that have attractive features such as their ability to function as contrast agents for X-ray computed tomography (CT) and photoacoustic (PA) imaging as well as good biocompatibility. Both in vitro and in vivo studies confirmed that the Bi2S3 nanoagents could potentiate the lethal effects of radiation via amplifying the local radiation dose and enhancing the anti-tumor efficacy of RT by augmenting the photo-thermal effect...
2017: Theranostics
https://www.readbyqxmd.com/read/29158591/surgical-oncology-for-gliomas-the-state-of-the-art
#3
REVIEW
Nader Sanai, Mitchel S Berger
Surgical resection remains the mainstay of treatment for patients with glioma of any grade. Maximal resection of the tumour is central to achieving long-term disease control; however, the relationship between the extent of glioma resection and actual clinical benefit for the patient is predicated on the balance between cytoreduction and neurological morbidity. For the neurosurgical oncologist, the clinical rationale for undertaking increasingly extensive resections has gained traction. In parallel, novel surgical techniques and technologies have been developed that help improve patient outcomes...
November 21, 2017: Nature Reviews. Clinical Oncology
https://www.readbyqxmd.com/read/29157359/countercurrent-heat-exchange-and-thermoregulation-during-blood-feeding-in-kissing-bugs
#4
Chloé Lahondère, Teresita C Insausti, Rafaela Mm Paim, Xiaojie Luan, George Belev, Marcos H Pereira, Juan P Ianowski, Claudio R Lazzari
Blood-sucking insects experience thermal stress at each feeding event on endothermic vertebrates. We used thermography to examine how kissing-bugs Rhodnius prolixus actively protect themselves from overheating. During feeding, these bugs sequester and dissipate the excess heat in their heads while maintaining an abdominal temperature close to ambient. We employed a functional-morphological approach, combining histology, µCT and X-ray-synchrotron imaging to shed light on the way these insects manage the flow of heat across their bodies...
November 21, 2017: ELife
https://www.readbyqxmd.com/read/29155621/science-to-practice-enhancing-photothermal-ablation-of-colorectal-liver-metastases-with-targeted-hybrid-nanoparticles
#5
Xiaoming Yang
Image-guided percutaneous thermal ablation has been one of the principal tools in management of unresectable liver malignancies, including colorectal liver metastases (CRLM) ( 1 ). Currently, however, this technique is suitable mainly for tumors less than 4-5 cm in diameter and also results in incomplete ablation at tumor margins ( 2 ). To solve these problems, efforts have been made to combine thermal ablation with other treatment options, such as systemic and intra-arterial administration of therapeutics ( 3 - 5 )...
December 2017: Radiology
https://www.readbyqxmd.com/read/29155565/an-integrated-hot-stage-microscope-direct-analysis-in-real-time-mass-spectrometry-system-for-studying-the-thermal-behavior-of-materials
#6
Gage P Ashton, Lindsay P Harding, Gareth M B Parkes
This paper describes a new analytical instrument that combines a precisely temperature-controlled hot-stage with digital microscopy and Direct Analysis in Real-Time mass spectrometry (DART-MS) detection. The novelty of the instrument lies in its ability to monitor processes as a function of temperature through the simultaneous recording of images, quantitative color changes and mass spectra. The capability of the instrument was demonstrated through successful application to four very varied systems including profiling an organic reaction, decomposition of silicone polymers and the desorption of rhodamine B from an alumina surface...
November 20, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29154877/investigation-the-effect-of-graphene-oxide-and-gelatin-starch-weight-ratio-on-the-properties-of-starch-gelatin-go-nanocomposite-films-the-rsm-study
#7
Shima Afshar, Hossein Banisadi
In this study, we reported the design and fabrication of starch/gelatin/graphene oxide biodegradable nanocomposite films with proper potential for food packaging applications. The experiments were designed using Design Expert software via RSM by defining gelatin/starch weight ratio (G/S wt. ratio) and graphene oxide (GO) wt.% as process parameters affecting on the properties of the prepared films. The optimization was done and various properties of the optimum film were investigated. The XRD and SEM images confirmed that GO layers could intercalate in the starch/gelatin matrix and proper dispersion of nanofillers in the matrix obtained via solution casting method...
November 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29149568/individual-atomic-imaging-of-multiple-dopant-sites-in-as-doped-si-using-spectro-photoelectron-holography
#8
Kazuo Tsutsui, Tomohiro Matsushita, Kotaro Natori, Takayuki Muro, Yoshitada Morikawa, Takuya Hoshii, Kuniyuki Kakushima, Hitoshi Wakabayashi, Kouichi Hayashi, Fumihiko Matsui, Toyohiko Kinoshita
The atomic scale characterization of dopant atoms in semiconductor devices to establish correlations with the electrical activation of these atoms is the essential to the advancement of contemporary semiconductor process technology. Spectro-photoelectron holography combined with first-principles simulations can determine the local three-dimensional atomic structures of dopant elements, which in turn affect their electronic states. In the work reported herein, this technique was used to examine arsenic (As) atoms doped into a silicon (Si) crystal...
November 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/29149567/preparation-of-lithium-titanate-reduced-graphene-oxide-composites-with-3d-fishnet-like-conductive-structure-via-a-gas-foaming-method-for-high-rate-lithium-ion-batteries
#9
Tao Meng, Fenyun Yi, Honghong Cheng, Junnan Hao, Dong Shu, Shixu Zhao, Chun He, Xiaona Song, Fan Zhang
Using ammonium chloride (NH4Cl) as the pore-forming agent, three-dimensional (3D) "fishnet-like" lithium titanate/reduced graphene oxide (LTO/G) composites with hierarchical porous structure are prepared via a gas-foaming method. SEM and TEM images show that in the composite prepared with the NH4Cl concentration of 1 mg mL-1 (1-LTO/G), LTO particles with sizes of 50~100 nm disperse homogeneously on the 3D "fishnet-like" graphene sheets. The nitrogen-sorption analyses reveal the existence of micro/mesopores, which is attributed to the introduction of NH4Cl into the gap between the graphene sheets that further decomposes into gases and produces hierarchical pores during the thermal treatment process...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29149150/the-hopeless-case-palliative-cryoablation-and-cementoplasty-procedures-for-palliation-of-large-pelvic-bone-metastases
#10
Tyler M Coupal, Kevin Pennycooke, Paul I Mallinson, Hugue A Ouellette, Paul W Clarkson, Pippa Hawley, Peter L Munk
BACKGROUND: Metastases to the bone are common in cancer patients, and it has been estimated that up to 50% of patients with pelvic bone metastases will not achieve adequate pain control with medications alone. This has led to a paradigm shift over recent years towards the use and development of minimally invasive image-guided treatment options for palliation of bony metastases. Despite these developments, large metastatic lesions are still often considered to be "hopeless cases" that would garner little to no benefit from image-guided intervention...
November 2017: Pain Physician
https://www.readbyqxmd.com/read/29149049/preparation-of-solution-blown-polyamic-acid-nanofibers-and-their-imidization-into-polyimide-nanofiber-mats
#11
Jing Li, Guocheng Song, Junrong Yu, Yan Wang, Jing Zhu, Zuming Hu
Solution blow spinning (SBS) is an innovative process for spinning micro/nanofibers. In this paper, polyamic acid (PAA) nanofibers were fabricated via a SBS apparatus and then imidized into polyimide (PI) nanofibers via thermal process. The morphology and diameter distributions of PAA nanofibers were determined by scanning electron microscope (SEM) and Image Tool software, the processing parameters, including PAA concentration, solution feeding rate, gas pressure, nozzle size, and receiving distance were investigated in details...
November 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29147708/advanced-sensing-imaging-and-therapy-nanoplatforms-based-on-nd-3-doped-nanoparticle-composites-exhibiting-upconversion-induced-by-808-nm-near-infrared-light
#12
REVIEW
Ming-Hsien Chan, Ru-Shi Liu
Malignant tumors are currently the leading cause of death worldwide, followed by cardiovascular and cerebrovascular diseases. Although various methods, such as blood examination, tissue biopsy, and radiography, for tumor detection, exist, these techniques still require further refinement. Researchers have recently explored the use of novel adjuvant methods, specifically luminescence imaging detection, for the detection of tumors. The light-triggered approach is less invasive and induces fewer side effects than traditional detection methods...
November 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/29140463/anatomic-investigation-of-the-trajectory-for-stereotactic-laser-amygdalohippocampectomy
#13
Vanessa M Holanda, Abuzer Gungor, Serhat Baydin, Erik H Middlebrooks, Shabbar F Danish
BACKGROUND: Magnetic resonance imaging-guided laser interstitial thermal therapy (LITT) has emerged as a promising treatment for mesial temporal lobe epilepsy. Surgeons must understand the relevant anatomy that is traversed by the catheter and affected by ablation. OBJECTIVE: To study the anatomic structures crossed by the LITT catheter until it reaches the amygdala. METHODS: Three human cadaveric heads were implanted with catheters using a frameless stereotactic technique...
November 11, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29139396/folic-acid-modified-pluronic-f127-coating-ag2s-quantum-dot-for-photoacoustic-imaging-of-tumor-cell-targeting
#14
Ruo-Yun Zhang, Zhao-Yang Wang, Xiao-Quan Yang, Yang Xuan, Kai Cheng, Cheng Li, Xian-Lin Song, Jie An, Xiao-Lin Hou, Yuan-Di Zhao
In this study, oil-soluble Ag2S quantum dot (QD) was synthesized through thermal decomposition of single-source precursor method, and Pluronic F127 (PF127), a triblock copolymer functionalized with folic acid (FA), was deposited on the surface of QD, then water-soluble PF127-FA@Ag2S nanoprobe with targeting ability was fabricated. The as-prepared PF127-FA@Ag2S exhibited spheroidal morphology and high dispersibility, with average diameters of 115 ± 20.7 nm (as observed by transmission electron microscopy). No obvious toxicity of PF127-FA@Ag2S nanoprobe was found in standard 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay and colony-formation assay, indicating that decent biocompatibility and safety...
November 15, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29137730/the-influence-of-bovine-serum-albumin-modified-silica-on-the-physicochemical-properties-of-poly-vinyl-alcohol-nanocomposites-synthesized-by-ultrasonication-technique
#15
Shadpour Mallakpour, Hossein Yazdan Nazari
In this study, for the first time polymeric nanocomposite (NC) films of poly(vinyl alcohol)/SiO2@bovine serum albumin (PVA/SiO2@BSA) were synthesized by solution casting method under facile and fast method of sonication. In this regard, SiO2 nanoparticles (NPs) were modified by BSA, at room temperature by using phosphate buffer and ultrasonic-assisted method. Then, PVA/SiO2@BSA NCs were prepared by insertion of variant amount (3, 6 and 9wt%) of SiO2@BSA into the PVA matrix, under ultrasonic irradiation. The morphological traits of the NCs were surveyed by Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray diffraction and field emission scanning electron microscopy...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29136900/detection-of-yeast-saccharomyces-cerevisiae-with-ionic-liquid-mediated-carbon-dots
#16
Jia-Li Wang, Ji-Yuan Teng, Te Jia, Yang Shu
Hydrophobic nitrogen-doped carbon dots are prepared with energetic ionic liquid (1,3-dibutylimidazolium dicyandiamide, BbimDCN) as carbon source. A yield of as high as 58% is obtained for the carbon dots, shortly termed as BbimDCN-OCDs, due to the presence of thermal-instable N(CN)2(-) moiety. BbimDCN-OCDs exhibit favorable biocompability and excellent imaging capacity for fluorescence labelling of yeast cell Saccharomyces cerevisiae. In addition, chitosan-modified Dy(3+)-doped magnetic nanoparticles (shortly as Chitosan@Fe2...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29134804/concurrent-la-and-a-site-vacancy-doping-modulates-the-thermoelectric-response-of-srtio3-experimental-and-computational-evidence
#17
Feridoon Azough, Samuel S Jackson, Dursun Ekren, Robert Freer, Marco Molinari, Stephen R Yeandel, Pooja M Panchmatia, Stephen C Parker, David Hernandez Maldonado, Demie M Kepaptsoglou, Quentin M Ramasse
To help understand the factors controlling the performance of one of the most promising n-type oxide thermoelectrics SrTiO3, we need to explore structural control at the atom level. In Sr1-xLa2x/3TiO3 ceramics (0.0 ≤ x ≤ 0.9), we determined that the thermal conductivity can be reduced and controlled through an interplay of La substitution and A-site vacancies and the formation of a layered structure. The decrease in thermal conductivity with La and A-site vacancy substitution dominates the trend in the overall thermoelectric response...
November 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29134066/the-electric-honeycomb-an-investigation-of-the-rose-window-instability
#18
Muhammad Shaheer Niazi
The Rose window instability is a little-explored electrohydrodynamic instability that manifests when a layer of low-conducting oil is placed in an electric field generated by corona discharge in a point-to-plane configuration. Above a critical voltage, the instability starts as a single dimple in the oil layer right below the point electrode and subsequently evolves into a characteristic pattern of polygonal cells. In this study, we experimentally explore governing parameters that guide the instability and document geometric attributes of the characteristic cellular pattern...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29133226/the-effect-of-dietary-neonicotinoid-pesticides-on-non-flight-thermogenesis-in-worker-bumble-bees-bombus-terrestris
#19
Robert Potts, Rebecca M Clarke, Sophie E Oldfield, Lisa K Wood, Natalie Hempel de Ibarra, James E Cresswell
For bumble bees (genus Bombus), the capacity for non-flight thermogenesis is essential for two fundamental processes undertaken by adult workers, namely recovery from torpor after chilling and brood incubation. Farmland bees can be widely exposed to dietary residues of neurotoxic neonicotinoid insecticides that appear in the nectar and pollen of treated bee-attractive crops, which may harm them. An earlier study shows that dietary neonicotinoids cause complex alterations to thermoregulation in honey bees, but their effects on the thermogenic capabilities of individual bumble bees has been untested previously...
November 10, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29132258/effect-of-three-pretreatment-techniques-on-the-chemical-composition-and-on-the-methane-yields-of-opuntia-ficus-indica-prickly-pear-biomass
#20
P S Calabrò, E Catalán, A Folino, A Sánchez, D Komilis
Opuntia ficus-indica (OFI) is an emerging biomass that has the potential to be used as substrate in anaerobic digestion. The goal of this work was to investigate the effect of three pretreatment techniques (thermal, alkaline, acidic) on the chemical composition and the methane yield of OFI biomass. A composite experimental design with three factors and two to three levels was implemented, and regression modelling was employed using a total of 10 biochemical methane potential (BMP) tests. The measured methane yields ranged from 289 to 604 NmL/gVSadded; according to the results, only the acidic pretreatment (HCl) was found to significantly increase methane generation...
November 1, 2017: Waste Management & Research
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