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https://www.readbyqxmd.com/read/29330374/predicting-fibrosis-progression-in-renal-transplant-recipients-using-laser-based-infrared-spectroscopic-imaging
#1
Vishal K Varma, Andre Kajdacsy-Balla, Sanjeev Akkina, Suman Setty, Michael J Walsh
Renal transplants have not seen a significant improvement in their 10-year graft life. Chronic damage accumulation often leads to interstitial fibrosis and tubular atrophy (IF/TA) and thus graft function loss over time. For this reason, IF/TA has been the chief suspect for a potential prognostic marker for long term outcomes. In this study, we have used infrared spectroscopic (IR) imaging to interrogate the biochemistry of regions of fibrosis from renal transplant biopsies to identify a biochemical signature that can predict rapid progression of fibrosis...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29328279/tunable-mid-infrared-source-from-an-ultrafast-two-color-yb-fiber-chirped-pulse-amplifier-erratum
#2
Mojtaba Hajialamdari, Donna Strickland
This Erratum is presented to correct the reported [Opt. Lett.37, 3570 (2012)] power of the generated long wavelength, mid-infrared power.
January 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29328269/generation-of-400%C3%A2-%C3%A2-%C3%AE-w-at-17-5%C3%A2-%C3%A2-%C3%A2%C2%B5m-using-a-two-color-yb-fiber-chirped-pulse-amplifier-erratum
#3
Alaa Al-Kadry, Donna Strickland
An Erratum is presented to correct the reported [Opt. Lett.36, 1080 (2011)OPLEDP0146-959210.1364/OL.36.001080] power of the generated long wavelength, mid-infrared power.
January 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29328116/hybrid-sensing-face-detection-and-registration-for-low-light-and-unconstrained-conditions
#4
Mingyuan Zhou, Haiting Lin, S Susan Young, Jingyi Yu
The capability to track, detect, and identify human targets in highly cluttered scenes under extreme conditions, such as in complete darkness or on the battlefield, has been one of the primary tactical advantages in military operations. In this paper, we propose a new collaborative, multi-spectrum sensing method to achieve face detection and registration under low-light and unconstrained conditions. We design and prototype a novel type of hybrid sensor by combining a pair of near-infrared (NIR) cameras and a thermal camera (a long-wave infrared camera)...
January 1, 2018: Applied Optics
https://www.readbyqxmd.com/read/29327385/ultrathin-semiconductor-superabsorbers-from-the-visible-to-the-near-infrared
#5
Pau Molet, Juan Luis Garcia-Pomar, Cristiano Matricardi, Miquel Garriga, Maria Isabel Alonso, Agustín Mihi
The design of ultrathin semiconducting materials that achieve broadband absorption is a long-sought-after goal of crucial importance for optoelectronic applications. To date, attempts to tackle this problem consisted either of the use of strong-but narrowband-or broader-but moderate-light-trapping mechanisms. Here, a strategy that achieves broadband optimal absorption in arbitrarily thin semiconductor materials for all energies above their bandgap is presented. This stems from the strong interplay between Brewster modes, sustained by judiciously nanostructured thin semiconductors on metal films, and photonic crystal modes...
January 12, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29326993/turning-double-hydrophilic-into-amphiphilic-ir825-conjugated-polymeric-nanomicelles-for-near-infrared-fluorescence-imaging-guided-photothermal-cancer-therapy
#6
Guang-Yu Pan, Hao-Ran Jia, Ya-Xuan Zhu, Fu-Gen Wu
Developing biocompatible and photodegradable photothermal agents (PTAs) holds great promise for potential clinical applications in photothermal cancer therapy. Herein, a new PTA was innovatively constructed by conjugating the hydrophobic near-infrared (NIR) heptamethine cyanine molecule IR825-NH2 with a double hydrophilic block copolymer methoxypoly(ethylene glycol)5k-block-poly(l-aspartic acid sodium salt)10 (abbreviated as PEG-PLD) via amine-carboxyl reaction. The as-designed PEG-PLD(IR825) was amphiphilic and could self-assemble into polymeric nanomicelles in aqueous solutions...
January 12, 2018: Nanoscale
https://www.readbyqxmd.com/read/29322019/to-identify-or-not-to-identify-parathyroid-glands-during-total-thyroidectomy
#7
REVIEW
Yuk Kwan Chang, Brian H H Lang
Hypoparathyroidism is one of the most common complications after total thyroidectomy and may impose a significant burden to both the patient and clinician. The extent of thyroid resection, surgical techniques, concomitant central neck dissection, parathyroid gland (PG) autotransplantation and inadvertent parathyroidectomy have long been some of the risk factors for postoperative hypoparathyroidism. Although routine identification of PGs has traditionally been advocated by surgeons, recent evidence has suggested that perhaps identifying fewer number of in situ PGs during surgery (i...
December 2017: Gland Surgery
https://www.readbyqxmd.com/read/29320428/monitoring-reaction-paths-using-vibrational-spectroscopies-the-case-of-the-dehydrogenation-of-propane-toward-propylene-on-pd-doped-cu-111-surface
#8
Wei Hu, Xinrui Cao
Monitoring reaction paths is not only a fundamental scientific issue but also helps us to understand and optimize the catalytic process. Infrared (IR) and Raman spectroscopies are powerful tools for detecting particular molecules or intermediate products as a result of their ability to provide the molecular "finger-print". However, theoretical modeling for the vibrational spectra of molecular adsorbates on metallic surfaces is a long-standing challenge, because accurate descriptions of the electronic structure for both the metallic substrates and adsorbates are required...
January 10, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29316453/degradable-rhenium-trioxide-nanocubes-with-high-localized-surface-plasmon-resonance-absorbance-like-gold-for-photothermal-theranostics
#9
Wenlong Zhang, Guoying Deng, Bo Li, Xinxin Zhao, Tao Ji, Guosheng Song, Zhiyin Xiao, Qing Cao, Jingbo Xiao, Xiaojuan Huang, Guoqiang Guan, Rujia Zou, Xinwu Lu, Junqing Hu
The applications of inorganic theranostic agents in clinical trials are generally limited to their innate non-biodegradability and potential long-term biotoxicity. To address this problem, herein via a straightforward and tailored space-confined on-substrate route, we obtained rhenium trioxide (ReO3) nanocubes (NCs) that display a good biocompatibility and biosafety. Importantly, their aqueous dispersion has high localized surface plasmon resonance (LSPR) absorbance in near-infrared (NIR) region different from previous report, which possibly associates with the charge transfer and structural distortion in hydrogen rhenium bronze (HxReO3), as well as ReO3's cubic shape...
December 27, 2017: Biomaterials
https://www.readbyqxmd.com/read/29315216/uniformly-dispersed-and-re-agglomerated-graphene-oxide-based-cement-pastes-a-comparison-of-rheological-properties-mechanical-properties-and-microstructure
#10
Wu-Jian Long, Hao-Dao Li, Chang-Le Fang, Feng Xing
The properties of graphene oxide (GO)-based cement paste can be significantly affected by the state of GO dispersion. In this study, the effects of uniformly dispersed and re-agglomerated GO on the rheological, mechanical properties and microstructure of cement paste were systematically investigated. Two distinct dispersion states can be achieved by altering the mixing sequence: Polycarboxylate-ether (PCE) mixed with GO-cement or cement mixed with GO-PCE. The experimental results showed that the yield stress and plastic viscosity increased with the uniformly dispersed GO when compared to those of re-agglomerated GO cement paste...
January 9, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29314276/synthesis-of-crystalline-black-phosphorus-thin-film-on-sapphire
#11
Cheng Li, Ye Wu, Bingchen Deng, Yujun Xie, Qiushi Guo, Shaofan Yuan, Xiaolong Chen, Maruf Bhuiyan, Zishan Wu, Kenji Watanabe, Takashi Taniguchi, Hailiang Wang, Judy J Cha, Michael Snure, Yingwei Fei, Fengnian Xia
Black phosphorus (BP) has recently attracted significant attention due to its exceptional physical properties. Currently, high-quality few-layer and thin-film BP are produced primarily by mechanical exfoliation, limiting their potential in future applications. Here, the synthesis of highly crystalline thin-film BP on 5 mm sapphire substrates by conversion from red to black phosphorus at 700 °C and 1.5 GPa is demonstrated. The synthesized ≈50 nm thick BP thin films are polycrystalline with a crystal domain size ranging from 40 to 70 µm long, as indicated by Raman mapping and infrared extinction spectroscopy...
January 3, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29314179/an-in-vitro-oxidation-model-for-uhmwpe-incorporating-synovial-fluid-lipids
#12
Ebru Oral, Mitchell Fung, Shannon L Rowell, Orhun K Muratoglu
Post-irradiation melting of ultra-high molecular weight polyethylene (UHMWPE) reduced the oxidation potential of UHMWPE in vivo. After mid-term (5- 10 yrs) use in vivo, there is detectable oxidation in irradiated and melted joint implant retrievals. The absorption of the synovial fluid lipid squalene was identified as a possible factor initiating oxidation. We investigated the role of lipids in UHMWPE oxidation by asking: (1) Do other synovial fluid lipids initiate oxidation in irradiated and melted UHMWPE?; (2) What is the effect of the absorption of multiple lipids on UHMWPE oxidation?; (3) How does lipid-initiated oxidation in vitro compare to what is observed in long-term retrievals? We diffused emulsified single and mixed lipids into irradiated and melted UHMWPE and accelerated aged them...
January 4, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29313260/preparation-and-evaluation-of-progesterone-nanocrystals-to-decrease-muscle-irritation-and-improve-bioavailability
#13
Li Li, Wanqing Li, Jianxu Sun, Hui Zhang, Jing Gao, Fei Guo, Xi Yang, Xun Zhang, Ying Li, Aiping Zheng
Progesterone (PG) is a crucial immunomodulatory agent during early pregnancy, and nowadays PG oil-based injection (PG/OI) has a huge market all over the world. However, PG/OI may accumulate the local muscle and further cause irritations after long-term administration. In this study, PG nanocrystals (PG/NCs) injection was developed to decrease muscle toxicity. PG/NCs injection containing 10% (w/v) PG was first prepared using a wet grinding method. Then, particle size, zeta potential, morphology powder, X-ray diffraction (PXRD), differential scanning calorimetry (DSC), and Fourier transform infrared (FTIR) studies were carried out to evaluate the characteristics of dosage form...
January 8, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29311754/correlation-between-cerebral-hemodynamic-and-perfusion-pressure-changes-in-non-human-primates
#14
A Ruesch, M A Smith, G Wollstein, I A Sigal, S Nelson, J M Kainerstorfer
The mechanism that maintains a stable blood flow in the brain despite changes in cerebral perfusion pressure (CPP), and therefore guaranties a constant supply of oxygen and nutrients to the neurons, is known as cerebral autoregulation (CA). In a certain range of CPP, blood flow is mediated by a vasomotor adjustment in vascular resistance through dilation of blood vessels. CA is known to be impaired in diseases like traumatic brain injury, Parkinson's disease, stroke, hydrocephalus and others. If CA is impaired, blood flow and pressure changes are coupled and the oxygen supply might be unstable...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29306703/trace-organic-contaminant-rejection-by-aquaporin-forward-osmosis-membrane-transport-mechanisms-and-membrane-stability
#15
Ming Xie, Wenhai Luo, Hao Guo, Long D Nghiem, Chuyang Y Tang, Stephen R Gray
We investigated transport mechanisms of trace organic contaminants (TrOCs) through aquaporin thin-film composite forward osmosis (FO) membrane, and membrane stability under extreme conditions with respect to TrOC rejections. Morphology and surface chemistry of the aquaporin membrane were characterised to identify the incorporation of aquaporin vesicles into membrane active layer. Pore hindrance model was used to estimate aquaporin membrane pore size as well as to describe TrOC transport. TrOC transport mechanisms were revealed by varying concentration and type of draw solutions...
December 28, 2017: Water Research
https://www.readbyqxmd.com/read/29302953/utilization-of-targeted-near-infrared-molecular-imaging-to-improve-pulmonary-metastasectomy-of-osteosarcomas
#16
Jarrod D Predina, Andrew Newton, Charuhas Deshpande, Philip Low, Sunil Singhal
Pulmonary metastasectomy for osteosarcoma provides a select group of patients an opportunity for long-term survival and possible cure. Unfortunately, a complete metastasectomy is challenging due an inability to accurately identify lesions that lay below the threshold of preoperative imaging or intraoperative visual and tactile inspection. Growing evidence suggests that osteosarcomas express a number of unique molecular markers, including the folate receptor alpha. In this case report, we describe the application of a folate receptor-targeted, near-infrared optical contrast agent (OTL38) to improve osteosarcoma localization during minimally invasive pulmonary resection...
January 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29300056/intermolecular-configurations-dominated-by-quadrupole-quadrupole-electrostatic-interactions-explicit-correlation-treatment-of-the-five-dimensional-potential-energy-surface-and-infrared-spectra-for-the-co-n2-complex
#17
Jing-Min Liu, Yu Zhai, Xiao-Long Zhang, Hui Li
A thorough understanding of the intermolecular configurations of van der Waals complexes is a great challenge due to their weak interactions, floppiness and anharmonic nature. Although high-resolution microwave or infrared spectroscopy provides one of the most direct and precise pieces of experimental evidence, the origin and key role in determining such intermolecular configurations of a van der Waals system strongly depend on its highly accurate potential energy surface (PES) and a detailed analysis of its ro-vibrational wavefunctions...
January 4, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29298488/engineered-cellular-uptake-and-controlled-drug-delivery-using-two-dimensional-nanoparticle-and-polymer-for-cancer-treatment
#18
Sudipta Senapati, Rashmi Shukla, Arun Kumar Mahanta, Dipak Rana, Pralay Maiti, Yamini B Tripathi
Two major problems in chemotherapy, poor bioavailability of hydrophobic anti-cancer drug and its adverse side effects causing nausea, are taken into accounts by developing sustained drug release vehicle along with enhanced bioavailability using two-dimensional layered double hydroxides (LDHs) with appropriate surface charge and its subsequent embedment in polymer matrix. A model hydrophobic anti-cancer drug, raloxifene hydrochloride (RH), is intercalated into a series of zinc iron LDHs with varying anion charge densities using ion exchange technique...
January 4, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29295656/core-shell-poly-lactide-co-%C3%AE%C2%B5-caprolactone-gelatin-fiber-scaffolds-as-ph-sensitive-drug-delivery-systems
#19
Qingqing Sang, Heyu Li, Gareth Williams, Huanling Wu, Li-Min Zhu
Dual-drug-loaded pH-responsive fiber scaffolds were successfully prepared by coaxial electrospinning. These were designed with the aim of being sutured into the resection site after tumor removal, to aid recovery and prevent cancer recurrence. The shell was made up of a mixture of gelatin and sodium bicarbonate (added to provide pH-sensitivity), and was loaded with the anti-inflammatory drug ciprofloxacin; the core comprised poly(lactide-co-ε-caprolactone) with the chemotherapeutic doxorubicin hydrochloride...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29288051/acceleration-of-amyloid-fibril-formation-by-carboxyl-terminal-truncation-of-human-serum-amyloid-a
#20
Masafumi Tanaka, Toru Kawakami, Nozomi Okino, Kaoru Sasaki, Kiwako Nakanishi, Hiroka Takase, Toshiyuki Yamada, Takahiro Mukai
Human serum amyloid A (SAA) is a precursor protein of AA amyloidosis. Although the full-length SAA is 104 amino acids long, the C-terminal-truncated SAA lacking mainly residues 77-104 is predominantly deposited in AA amyloidosis. Nevertheless, the amyloid fibril formation of such truncated forms of human SAA has never been investigated. In the present study, we examined the effect of C-terminal truncation on amyloid fibril formation of human SAA induced by heparan sulfate (HS). Circular dichroism (CD) measurements demonstrated that the C-terminal truncation induces a reduced α-helical structure of the SAA molecule...
December 26, 2017: Archives of Biochemistry and Biophysics
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