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https://www.readbyqxmd.com/read/28528189/long-term-follow-up-after-near-infrared-fluorescence-guided-resection-of-colorectal-liver-metastases-a-retrospective-multicenter-analysis
#1
H J M Handgraaf, L S F Boogerd, D J Höppener, A Peloso, B G Sibinga Mulder, C E S Hoogstins, H H Hartgrink, C J H van de Velde, J S D Mieog, R J Swijnenburg, H Putter, M Maestri, A E Braat, J V Frangioni, A L Vahrmeijer
BACKGROUND: Several studies demonstrated that intraoperative near-infrared fluorescence (NIRF) imaging using indocyanine green (ICG) identifies (sub)capsular colorectal liver metastases (CRLM) missed by other techniques. It is unclear if this results in any survival benefit. This study evaluates long-term follow-up after NIRF-guided resection of CRLM using ICG. METHODS: First, patients undergoing resection of CRLM with or without NIRF imaging were analyzed retrospectively...
May 6, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28527989/the-effect-of-ph-on-the-bonding-of-cu-2-and-chitosan-montmorillonite-composite
#2
Chao Hu, Guoyuan Li, Yiyu Wang, Fengyi Li, Guangguang Guo, Hongqing Hu
Based on the contradict statements on the mechanisms of the bonding between metal ions and chitosan based adsorbent, this paper present studies on the Cu(2+) adsorption by the chitosan-montmorillonite composite. The in situ attenuated total reflectance Fourier transform infrared spectroscopy and two dimensional correlation analysis were used to record the spectra during the adsorption and the pH perturbation, and analyze the interaction sequence of the groups related to the adsorption, respectively. The results showed that the bonding with -NH3(+) might attribute the adsorption capacity greater than that with hydroxyl...
May 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28527744/abundance-and-composition-of-near-surface-microplastics-and-plastic-debris-in-the-stockholm-archipelago-baltic-sea
#3
Berit Gewert, Martin Ogonowski, Andreas Barth, Matthew MacLeod
We collected plastic debris in the Stockholm Archipelago using a manta trawl, and additionally along a transect in the Baltic Sea from the island of Gotland to Stockholm in a citizen science study. The samples were concentrated by filtration and organic material was digested using hydrogen peroxide. Suspected plastic material was isolated by visual sorting and 59 of these were selected to be characterized with Fourier transform infrared spectroscopy. Polypropylene and polyethylene were the most abundant plastics identified among the samples (53% and 24% respectively)...
May 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28526867/aberrant-functional-connectivity-in-depression-as-an-index-of-state-and-trait-rumination
#4
David Rosenbaum, Alina Haipt, Kristina Fuhr, Florian B Haeussinger, Florian G Metzger, Hans-Christoph Nuerk, Andreas J Fallgatter, Anil Batra, Ann-Christine Ehlis
Depression has been shown to be related to a variety of aberrant brain functions and structures. Particularly the investigation of alterations in functional connectivity (FC) in major depressive disorder (MDD) has been a promising endeavor, since a better understanding of pathological brain networks may foster our understanding of the disease. However, the underling mechanisms of aberrant FC in MDD are largely unclear. Using functional near-infrared spectroscopy (fNIRS) we investigated FC in the cortical parts of the default mode network (DMN) during resting-state in patients with current MDD...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526841/organic-carbon-prediction-in-soil-cores-using-vnir-and-mir-techniques-in-an-alpine-landscape
#5
Xiaolin Jia, Songchao Chen, Yuanyuan Yang, Lianqing Zhou, Wu Yu, Zhou Shi
Diffuse reflectance spectroscopy (DRS), including visible and near-infrared (VNIR) and mid-infrared (MIR) radiation, is a rapid, accurate and cost-effective technique for estimating soil organic carbon (SOC). We examined 24 soil cores (0-100 cm) from the Sygera Mountains on the Qinghai-Tibet Plateau, considering field-moist intact VNIR, air-dried ground VNIR and air-dried ground MIR spectra at 5-cm intervals. Preprocessed spectra were used to predict the SOC in the soil cores using partial least squares regression (PLSR) and a support vector machine (SVM)...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28525866/theoretical-spectroscopic-insights-of-tautomers-and-enantiomers-of-penicillamine
#6
J Mendes, K J de Almeida, J L Neto, T C Ramalho, H A Duarte
B3LYP and MP2 calculations have been carried out to investigate tautomers and enantiomers of penicillamine (Pen). Their infrared (IR), ultraviolet (UV), circular dichroism (CD) and nuclear magnetic resonance (NMR) spectra were obtained at linear-response, time-dependent DFT (TD-DFT). IR, UV and NMR spectra cannot be used to identify Pen enantiomers, showing nearly equal spectral profiles. CD spectra, however, give rise to completely symmetric signals, forming a perfect specular image to each other. Distinct CD profiles were also obtained for Pen tautomers...
May 11, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28525710/mercury-telluride-quantum-dot-based-phototransistor-enabling-high-sensitivity-room-temperature-photodetection-at-2000-nanometers
#7
Mengyu Chen, Haipeng Lu, Nema M Abdelazim, Ye Zhu, Zhen Wang, Wei Ren, Stephen V Kershaw, Andrey L Rogach, Ni Zhao
Near-to-Mid infrared photodetection technologies could be widely deployed to advance the infrastructures of surveillance, environmental monitoring and manufacturing, if the detection devices would be low-cost, in compact format and with high performance. For such application requirements, colloidal quantum dot (QD) based photodetectors stand out as particularly promising due to the solution processability and ease of integration with silicon technologies; unfortunately, the detectivity of the QD photodetectors towards longer wavelengths has so far been low...
May 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28525708/affinity-based-assembly-of-peptides-on-plasmonic-nanoparticles-delivered-intracellularly-with-light-activated-control
#8
Demosthenes P Morales, William Wonderly, Xiao Huang, Meghan McAdams, Amanda Chron, Norbert O Reich
We report a universal strategy for functionalizing near-infrared light-responsive nanocarriers with both a peptide "cargo" and an orthogonal cell-penetrating peptide. Modularity of both the cargo and internalization peptide attachment are an important feature of these materials relying on the robust affinity of polyhistidine tags to nitrilotriacetic acid in the presence of nickel as well as the affinity of biotin labeled peptides to streptavidin. Attachment to the gold surface uses thiol labeled scaffolds terminated with the affinity partner...
May 19, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28525664/near-infrared-fluorescence-with-indocyanine-green-for-diagnostics-in-urology-initial-experience
#9
Andrey O Morozov, Yuri G Alyaev, Leonid M Rapoport, Dmitrii G Tsarichenko, Eugene A Bezrukov, Denis V Butnaru, Eugene S Sirota
INTRODUCTION: Fluorescence imaging with indocyanine green is used in urology for the detection of sentinel lymph nodes and identification of prostate margins in radical prostatectomy for delineation of resection zone and selective clamping of vessels in partial nephrectomy; for identification and evaluation of length of ureteral strictures; for assessment of perfusion and viability of anastomoses during reconstructive stage of cystectomy. Safety of this technique is proven, while its diagnostic value and usefulness is still controversial...
May 16, 2017: Urologia
https://www.readbyqxmd.com/read/28525285/development-of-plasmonic-cu2o-cu-composite-arrays-as-visible-and-near-infrared-light-driven-plasmonic-photocatalysts
#10
Kosuke Sugawa, Natsumi Tsunenari, Hideyuki Takeda, Saki Fujiwara, Tsuyoshi Akiyama, Jotaro Honda, Shuto Igari, Kyo Tokuda, Naoto Takeshima, Yasuhiro Watanuki, Satoshi Tsukahara, Kouichi Takase, Tetsuo Umegaki, Yoshiyuki Kojima, Nobuyuki Nishimiya, Nobuko Fukuda, Yasuyuki Kusaka, Hirobumi Ushijima, Joe Otsuki
We describe efficient visible- and near-infrared (Vis/NIR) light-driven photocatalytic properties of hybrids of Cu2O and plasmonic Cu arrays. The Cu2O/Cu arrays were prepared simply by allowing to stand a Cu half-shell array in oxygen atmosphere for 3 h, which were prepared by depositing Cu on two-dimensional colloidal crystals with diameters of 543 or 224 nm. The localized surface plasmon resonances (LSPRs) of the arrays were strongly excited at 866 and 626 nm, respectively at which the imaginary part of the dielectric function of Cu is small...
May 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28525272/direct-synthesis-of-an-unprecedented-stable-radical-of-nickel-ii-3-5-bis-dimedonyl-azadiisoindomethene-with-strong-and-narrow-near-infrared-absorption-at-%C3%AE-%C3%A2-1000-nm
#11
Elena A Makarova, Yuriy V Zatsikha, Kelly M E Newman, Vinod K Paidi, Valeria A Beletsky, Johan van Lierop, Evgeny A Lukyanets, Victor N Nemykin
An unprecedented stable neutral radical nickel(II) complex of 3,5-bis(dimedonyl)azadiisoindomethene (1) was prepared by the direct reaction between 1,3-diiminoisoindoline and dimedone. A new radical complex 1 has an intense and narrow absorption at 1008 nm and can be reduced to a less stable anionic [1](-) with a typical aza(dibenzo)boron dipyrromethene (aza-BODIPY) UV-vis spectrum. Complex 1, along with two other colored condensation reaction products 2 and 3, was characterized by spectroscopy and X-ray crystallography, while the paramagnetic nature of 1 was probed by EPR and SQUID methods...
May 19, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28524926/a-980-nm-laser-activated-upconverted-persistent-probe-for-nir-to-nir-rechargeable-in-vivo-bioimaging
#12
Zhenluan Xue, Xiaolong Li, Youbin Li, Mingyang Jiang, Guozhong Ren, Hongrong Liu, Songjun Zeng, Jianhua Hao
Long-lasting persistent luminescent nanoparticles (PLNPs) with efficient near-infrared (NIR) emission have emerged as a new generation of probes for in vivo optical bioimaging owing to their advantages of zero-autofluorescence benefited from the self-sustained emission after excitation, deep penetration depth, and a high signal-to-noise ratio. However, most of the PLNPs are charged by ultraviolet (UV) or visible light, remarkably limiting their applications for in vivo long-term bioimaging. Here we demonstrate 980 nm laser activated upconversion-PLNPs (UC-PLNPs) with efficient NIR emission...
May 19, 2017: Nanoscale
https://www.readbyqxmd.com/read/28524912/gold-nanocages-with-dual-modality-for-image-guided-therapeutics
#13
Shijin Bao, Shengnan Huang, Ying Liu, Yurong Hu, Weiping Wang, Mengfei Ji, Huili Li, Ning Xia Zhang, Chengzhi Song, Shaofeng Duan
Numerous studies have demonstrated that microRNAs are very important in cancer development and progression. However, the complex relationship between the size of microRNA delivery systems, cellular uptake, biodistribution and therapeutic efficiency remains unclear. Herein, we have successfully constructed a series of differently-sized microRNA delivery systems, miR-26a-loaded, hyaluronic acid-modified, polyetherimide-conjugated PEGylated gold nanocage ternary nanocomplexes (PPHAuNCs-TNCs), which can be monitored optically by fluorescence and photoacoustic tomography imaging...
May 19, 2017: Nanoscale
https://www.readbyqxmd.com/read/28524850/a-high-quantum-yield-molecule-protein-complex-fluorophore-for-near-infrared-ii-imaging
#14
Alexander L Antaris, Hao Chen, Shuo Diao, Zhuoran Ma, Zhe Zhang, Shoujun Zhu, Joy Wang, Alexander X Lozano, Quli Fan, Leila Chew, Mark Zhu, Kai Cheng, Xuechuan Hong, Hongjie Dai, Zhen Cheng
Fluorescence imaging in the second near-infrared window (NIR-II) allows visualization of deep anatomical features with an unprecedented degree of clarity. NIR-II fluorophores draw from a broad spectrum of materials spanning semiconducting nanomaterials to organic molecular dyes, yet unfortunately all water-soluble organic molecules with >1,000 nm emission suffer from low quantum yields that have limited temporal resolution and penetration depth. Here, we report tailoring the supramolecular assemblies of protein complexes with a sulfonated NIR-II organic dye (CH-4T) to produce a brilliant 110-fold increase in fluorescence, resulting in the highest quantum yield molecular fluorophore thus far...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28524656/multifunctional-and-redox-responsive-self-assembled-magnetic-nanovectors-for-protein-delivery-and-dual-modal-imaging
#15
Hong Yu Yang, Moon-Sun Jang, Yi Li, Jung Hee Lee, Doo Sung Lee
Nanoparticle (NP)-based model carriers present an emerging strategy for protein delivery. However, constructing a multifunctional nanocarrier with high loading capacity, diagnostic imaging capacity and controlled release capability is a tremendous challenge for protein delivery systems. Thus, we herein report on the fabrication of redox-responsive magnetic nanovectors (termed RMNs) through self- assembly of Fe3O4 NPs and redox-responsive polymer ligands, which could effectively transport protein and trigger intracellular protein release...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28524652/optical-characteristics-and-tumor-imaging-capabilities-of-near-infrared-dyes-in-free-and-nano-encapsulated-formulations-comprised-of-viral-capsids
#16
Yadir Guerrero, Sheela Singh, Turong Mai, Ravoori Murali, Leela Tanikella, Atta Zahedi, Vikas Kundra, Bahman Anvari
Near infrared (NIR) fluorescent molecules and nano-sized structures can serve as potential optical probes for image-guided removal of small tumor nodules (≈ < 1 mm diameter). While indocyanine green (ICG) remains as the only FDA-approved NIR dye, other organic dyes are under extensive development for enhanced imaging capabilities. One such dye is BrCy106-NHS where bromine is substituted for aromatic structures in cyanine dyes. Herein, we investigate the absorption and fluorescence characteristics of ICG and BrCy106-NHS, and quantitatively assess their tumor imaging capabilities in free (non-encapsulated) and a nano-encapsulated form that utilizes the capsid protein (CP) from genome-depleted plant-infecting brome mosaic virus as the encapsulating shell...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28523863/feasibility-of-near-infrared-transmittance-spectroscopy-to-predict-fatty-acid-composition-of-commercial-processed-meat
#17
Massimo De Marchi, Carmen L Manuelian, Sofia Ton, Martino Cassandro, Mauro Penasa
BACKGROUND: The new European Regulation 1169/2011 about nutrition declaration of food products compels to add saturated fatty acids, being voluntary to declare monounsaturated and polyunsaturated fatty acids. Therefore, industry is interested in more rapid, easy and less cost-effective analysis methods to accomplish the labelling regulation. This study aimed to evaluate the ability of near infrared transmittance spectroscopy (wavelengths between 850 and 1050 nm) to predict fatty acid (FA) composition of commercial processed meat samples (n = 310)...
May 19, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28523228/resting-state-and-personality-component-bis-bas-predict-the-brain-activity-eeg-and-fnirs-measure-in-response-to-emotional-cues
#18
Michela Balconi, Maria E Vanutelli, Elisabetta Grippa
INTRODUCTION: The present study explored the role of resting state and personality component (BIS/BAS measure) on prefrontal cortical responsiveness to emotional cues. Indeed, we supposed that lateralized resting activity (right vs. left) and approach (BAS) versus avoidance (BIS) attitude may explain the successive emotional processing within the prefrontal cortex (PFC) based on the stimulus valence (positive and negative emotional cues). METHODS: Hemodynamic (functional near-infrared spectroscopy, fNIRS) and electroencephalographic (EEG) measures were considered...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28522841/near-infrared-heptamethine-cyanine-based-iron-oxide-nanoparticles-for-tumor-targeted-multimodal-imaging-and-photothermal-therapy
#19
Sejy Lee, Reju George Thomas, Myeong Ju Moon, Hyeong Ju Park, In-Kyu Park, Byeong-Il Lee, Yong Yeon Jeong
Near-infrared fluorescent (NIRF) imaging modality holds great promise for tumor detection and offers several advantages of bioimaging, such as high tissue penetration with less background scattering. The disadvantage of NIRF bioimaging is that it has very low spatial resolution. Thus, the combination of NIRF with magnetic resonance imaging (MRI) is a good option because MRI can provide anatomical information with a higher resolution. Heptamethine cyanine dye (MHI-148) has been reported to have tumor-targeting capability which was used here as the NIRF agent...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522739/imaging-macrophage-accumulation-in-a-murine-model-of-chronic-pancreatitis-with-125-i-iododpa-spect-ct
#20
Catherine A Foss, Liansheng Liu, Ronnie C Mease, Haofan Wang, Pankaj Pasricha, Martin G Pomper
Background and Aims: Pancreatitis remains a diagnostic challenge in patients with mild to moderate disease, with current imaging modalities inadequate. Given the prominent macrophage infiltrate in chronic pancreatitis, we hypothesized that (125)I-iodo-DPA-713 (iodoDPA), a small-molecule radiotracer that specifically targets macrophages, could be used with single photon emission computed tomography-computed tomography (SPECT-CT) to image pancreatic inflammation in a relevant experimental model. Methods: Chronic pancreatitis was induced in C57BL/6 mice with cerulein and were contrasted with vehicle-injected controls...
May 18, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
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