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https://www.readbyqxmd.com/read/28340309/analytical-techniques-in-lipidomics-state-of-the-art
#1
Kamil Jurowski, Kamila Kochan, Justyna Walczak, Małgorzata Barańska, Wojciech Piekoszewski, Bogusław Buszewski
Current studies related to lipid identification and determination, or lipidomics in biological samples, are one of the most important issues in modern bioanalytical chemistry. There are many articles dedicated to specific analytical strategies used in lipidomics in various kinds of biological samples. However, in such literature, there is lack of articles dedicated to a comprehensive review of the actual analytical methodologies used in lipidomics. The aim of this article is to characterize the lipidomics methods used in modern bioanalysis according to the methodological point of view: 1) chromatography/separation methods, 2) spectroscopic methods and 3) mass spectrometry and also hyphenated methods...
March 24, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28339224/optical-manipulation-of-a-magnon-photon-hybrid-system
#2
C Braggio, G Carugno, M Guarise, A Ortolan, G Ruoso
We demonstrate an all-optical method for manipulating the magnetization in a 1-mm yttrium-iron-garnet (YIG) sphere placed in a ∼0.17  T uniform magnetic field. A harmonic of the frequency comb delivered by a multi-GHz infrared laser source is tuned to the Larmor frequency of the YIG sphere to drive magnetization oscillations, which in turn give rise to a radiation field used to thoroughly investigate the phenomenon. The radiation damping issue that occurs at high frequency and in the presence of highly magnetizated materials has been overcome by exploiting the magnon-photon strong coupling regime in microwave cavities...
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28335224/structural-changes-induced-in-grapevine-vitis-vinifera-l-dna-by-femtosecond-ir-laser-pulses-a-surface-enhanced-raman-spectroscopic-study
#3
Nicoleta E Dina, Cristina M Muntean, Nicolae Leopold, Alexandra Fălămaș, Adela Halmagyi, Ana Coste
In this work, surface-enhanced Raman spectra of ten genomic DNAs extracted from leaf tissues of different grapevine (Vitis vinifera L.) varieties, respectively, are analyzed in the wavenumber range 300-1800 cm(-1). Furthermore, structural changes induced in grapevine genomic nucleic acids upon femtosecond (170 fs) infrared (IR) laser pulse irradiation (λ = 1100 nm) are discussed in detail for seven genomic DNAs, respectively. Surface-enhanced Raman spectroscopy (SERS) signatures, vibrational band assignments and structural characterization of genomic DNAs are reported for each case...
May 25, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334692/sers-active-liposome-ag-au-nanocomposite-for-nir-light-driven-drug-release
#4
Yangyang Zhao, Jing Zhao, Guiye Shan, Dongmei Yan, Yanwei Chen, Yichun Liu
It is important to control drug release and detect the distribution of drug molecules before and after release. In this work, liposome@AgAu nanocomposite is prepared for drug delivery, which not only can control drug release by near infrared laser irradiation but also can monitor drug molecules by surface enhanced Raman scattering (SERS) and fluorescence signal during the release process. The liposome@AgAu core/shell nanocomposite prepared by the galvanic replacement reaction (GRR) shows tunable localized surface plasmon resonance (LSPR) absorption peaks from visible to near-infrared region and good biocompatibility...
March 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28334688/preparation-of-poly-n-isopropylacrylamide-block-acrylic-acid-encapsulated-proteinaceous-microbubbles-for-delivery-of-doxorubicin
#5
Xiaochen Ma, Qingxia Liu
Inspired by theranostic technologies, we electrostatically loaded proteinaceous microbubbles (MBs) with a model drug, doxorubicin (Dox) to couple their utilizations in diagnostic imaging with drug loading. A temperature-sensitive polymer, poly(N-isopropylacrylamide-block-acrylic acid) (poly(NIPAM-b-AAc)) was used to encapsulate the Dox-loaded MBs to prevent premature release and to control the Dox release thermally. An LCST of 39°C, slightly higher than normal body temperatures, enables the release of Dox through a conformational change of the polymer shell upon moderate heating...
March 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28332818/in-situ-preparation-of-metal-halide-perovskite-nanocrystal-thin-films-for-improved-light-emitting-devices
#6
Lianfeng Zhao, Yao-Wen Yeh, Nhu L Tran, Fan Wu, Zhengguo Xiao, Ross A Kerner, YunHui L Lin, Gregory D Scholes, Nan Yao, Barry P Rand
Hybrid organic-inorganic halide perovskite semiconductors are attractive candidates for optoelectronic applications, such as photovoltaics, light-emitting diodes, and lasers. Perovskite nanocrystals are of particular interest, where electrons and holes can be confined spatially, promoting radiative recombination. However, nanocrystalline films based on traditional colloidal nanocrystal synthesis strategies suffer from the use of long insulating ligands, low colloidal nanocrystal concentration, and significant aggregation during film formation...
March 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28330342/experimental-verification-of-the-cluster-model-of-ch3f-ortho-h2-n-in-solid-para-h2-by-using-mid-infrared-pump-probe-laser-spectroscopy
#7
Yuki Miyamoto, Asao Mizoguchi, Hideto Kanamori
The bleaching process in the C-F stretching mode (ν3 band) of CH3F-(ortho-H2)n [n = 0 and 1] clusters in solid para-H2 was monitored using pump and probe laser spectroscopy on the C-H stretching mode (ν1 and 2ν5 bands). From an analysis of the depleted spectral profiles, the transition frequency and linewidth of each cluster were directly determined. The results agree with the values previously derived from a deconvolution analysis of the broadened ν1/2ν5 spectrum observed by FTIR spectroscopy. The complementary increase and decrease between the n = 0 and 1 components were also verified through monitoring the ν1 and 2ν5 bands, which suggests a closed system among the CH3F-(ortho-H2)n clusters...
March 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28329870/application-of-imaging-techniques-to-cases-of-drug-induced-crystal-nephropathy-in-preclinical-studies
#8
B Lenz, A Brink, M Siam, A De Paepe, S Bassett, A Eichinger-Chapelon, P Maliver, R Neff, U Niederhauser, B Steinhuber, R Zurbach, T Singer, C Funk, F Schuler, M Albassam, S Schadt
A number of drugs can cause precipitates within renal tubules leading to crystal nephropathy. Crystal nephropathy is usually an exposure-related finding and is not uncommon in preclinical studies, where high doses are tested. An understanding of the nature of precipitates is important for human risk assessment and further development. Our aim was to investigate the ability of various imaging techniques to detect the presence of drugs or metabolites in renal crystals. We applied matrix-assisted laser desorption/ionization - Fourier transform ion cyclotron resonance mass spectrometry (MALDI-FTICR MS) imaging, Raman and infrared microspectroscopy, scanning electron microscopy coupled with energy dispersive X-ray (SEM/EDX) spectroscopy and standard histopathology to cases of drug-induced crystal nephropathy, induced in rodents and primates by four compounds...
February 27, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28329728/nanohybrid-magnetic-liposome-functionalized-with-hyaluronic-acid-for-enhanced-cellular-uptake-and-near-infrared-triggered-drug-release
#9
Van Du Nguyen, Shaohui Zheng, Jiwon Han, Viet Ha Le, Jong-Oh Park, Sukho Park
The aim of this work is to prepare and evaluate a novel lipid-polymer hybrid liposomal nanoplatform (hyaluronic acid-magnetic nanoparticle-liposomes, HA-MNP-LPs) as a vehicle for targeted delivery and triggered release of an anticancer drug (docetaxel, DTX) in human breast cancer cells. We first synthesize an amphiphilic hyaluronic acid hexadecylamine polymer (HA-C16) to enhance the targeting ability of the hybrid liposome. Next, HA-MNP-LPs are constructed to achieve an average size of 189.93±2.74nm in diameter...
March 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28328540/er-3-tm-3-yb-3-camoo4-phosphor-as-an-outstanding-upconversion-based-optical-temperature-sensor-and-optical-heater
#10
Riya Dey, Vineet Kumar Rai
Optical temperature sensing in Er(3+)-Tm(3+)-Yb(3+)codoped CaMoO4 phosphor prepared by chemical co-precipitation route based on the near infrared (NIR) to green upconversion emission from Er(3+) ion is reported. The variation with respect to external temperature in emission intensity ratio of the green emissions around 530 nm and 552 nm, corresponding to the (2)H11/2 → (4)I15/2 and (4)S3/2 → (4)I15/2 transitions respectively, under 980 nm excitation has been studied in detail, to report the sensing property of the prepared material; the maximum sensor sensitivity ∼0...
March 22, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28322514/strategies-to-improve-cancer-photothermal-therapy-mediated-by-nanomaterials
#11
REVIEW
Duarte de Melo-Diogo, Cleide Pais-Silva, Diana R Dias, André F Moreira, Ilídio J Correia
The deployment of hyperthermia-based treatments for cancer therapy has captured the attention of different researchers worldwide. In particular, the application of light-responsive nanomaterials to mediate hyperthermia has revealed promising results in several pre-clinical assays. Unlike conventional therapies, these nanostructures can display a preferential tumor accumulation and thus mediate, upon irradiation with near-infrared light, a selective hyperthermic effect with temporal resolution. Different types of nanomaterials such as those based on gold, carbon, copper, molybdenum, tungsten, iron, palladium and conjugated polymers have been used for this photothermal modality...
March 21, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28322153/recent-progress-in-808-nm-excited-upconversion-nanomaterials-as-multifunctional-nanoprobes-for-visualized-theranostics-in-cancers
#12
Leyong Zeng, Di Wu, Ying Tian, Yuanwei Pan, Aiguo Wu, Jinchao Zhang, Guangming Lu
Near-infrared (NIR) light responsive nanomaterials have attracted considerable attention due to their location in the biological window. Especially, lanthanide-doped nanomaterials exhibit unique upconversion luminescence (UCL) properties with low background interference and long luminescence lifetime, which makes them promising in imaging diagnosis of cancers. Compared with traditional upconversion nanomaterials excited by 980 nm laser, 808 nm excitation can overcome the disadvantages of high heating effect and weak penetration depth induced by excitation source...
March 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28321647/photobiomodulation-of-wound-healing-via-visible-and-infrared-laser-irradiation
#13
Hakan Solmaz, Yekta Ulgen, Murat Gulsoy
Fibroblast cells are known to be one of the key elements in wound healing process, which has been under the scope of research for decades. However, the exact mechanism of photobiomodulation on wound healing is not fully understood yet. Photobiomodulation of 635 and 809 nm laser irradiation at two different energy densities were investigated with two independent experiments; first, in vitro cell proliferation and then in vivo wound healing. L929 mouse fibroblast cell suspensions were exposed with 635 and 809 nm laser irradiations of 1 and 3 J/cm(2) energy densities at 50 mW output power separately for the investigation of photobiomodulation in vitro...
March 20, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28317861/hydatid-detection-using-the-near-infrared-transmission-angular-spectra-of-porous-silicon-microcavity-biosensors
#14
Peng Li, Zhenhong Jia, Guodong Lü
Hydatid, which is a parasitic disease, occurs today in many regions worldwide. Because it can present a serious threat to people's health, finding a fast, convenient, and economical means of detection is important. This paper proposes a label- and spectrophotometer-free apparatus that uses optical biological detection based on porous silicon microcavities. In this approach, the refractive index change induced by the biological reactions of a sample in a porous silicon microcavity is detected by measuring the change in the incidence angle corresponding to the maximum transmitted intensity of a near-infrared probe laser...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28316242/wafer-scale-synthesis-of-high-quality-semiconducting-two-dimensional-layered-inse-with-broadband-photoresponse
#15
Zhibin Yang, Wenjing Jie, Chun-Hin Mak, Shenghuang Lin, Huihong Lin, Xianfeng Yang, Feng Yan, Shu Ping Lau, Jianhua Hao
Large-scale synthesis of two-dimensional (2D) materials is one of the significant issues for fabricating layered materials into practical devices. As one of the typical III-VI semiconductors, InSe has attracted much attention due to its outstanding electrical transport property, attractive quantum physics characteristics and dramatic photoresponse when it is reduced to atomic scale. However, scalable synthesis of single phase 2D InSe has not yet been achieved so far, greatly hindering further fundamental studies and device applications...
March 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28315815/self-assembled-photoadditives-in-polyester-films-allow-stop-and-go-chemical-release
#16
Ting Cheng, Richard O'Rorke, Raphael Francois Ortiz, Tay Yee Yan, Eva Hemmer, Fiorenzo Vetrone, Robert S Marks, Terry W J Steele
Near-infrared (NIR) triggered chemical delivery allows on-demand release with the advantage of external tissue stimulation. Bioresorbable polyester poly-L-lactic acid (PLLA) was compounded with photoadditives of neat zinc oxide (ZnO) nanoparticles and 980 → 365 nm LiYF4:Tm(3+), Yb(3+) upconverting nanoparticles (UCNP). Subsequently, neat ZnO and UCNP blended PLLA films of sub-50 μm thickness were knife casted with a hydrophobic small molecule drug mimic, fluorescein diacetate. The PLLA films displayed a 500 times increase in fluorescein diacetate release from the 50 mW NIR irradiated PLLA/photoadditive film compared to non-irradiated PLLA control films...
March 15, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28314913/laser-and-light-based-therapy-for-cutaneous-and-soft-tissue-metastases-of-malignant-melanoma-a-systematic-review
#17
REVIEW
Evan Austin, Andrew Mamalis, Derek Ho, Jared Jagdeo
Invasive cutaneous melanoma is a growing health concern. Although surgical excision can effectively treat in situ tumors, use for metastatic melanoma is limited. Laser and light-based therapies may be a valuable palliative treatment option for patients with stage III and stage IV cutaneous metastatic melanoma. Our goal is to review the published literature and provide evidence-based recommendations on laser and light-based palliative therapies for metastatic melanoma. A search of the databases Pubmed, EMBASE, Web of Science, and CINAHL was performed on March 10, 2016...
March 17, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28314364/effect-of-ge-content-on-the-formation-of-ge-nanoclusters-in-magnetron-sputtered-gezrox-based-structures
#18
L Khomenkova, D Lehninger, O Kondratenko, S Ponomaryov, O Gudymenko, Z Tsybrii, V Yukhymchuk, V Kladko, J von Borany, J Heitmann
Ge-rich ZrO2 films, fabricated by confocal RF magnetron sputtering of pure Ge and ZrO2 targets in Ar plasma, were studied by multi-angle laser ellipsometry, Raman scattering, Auger electron spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction for varied deposition conditions and annealing treatments. It was found that as-deposited films are homogeneous for all Ge contents, thermal treatment stimulated a phase separation and a formation of crystalline Ge and ZrO2. The "start point" of this process is in the range of 640-700 °C depending on the Ge content...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28306236/hydrophobic-ir-780-dye-encapsulated-in-crgd-conjugated-solid-lipid-nanoparticles-for-nir-imaging-guided-photothermal-therapy
#19
Ye Kuang, Kunchi Zhang, Yi Cao, Xing Chen, Kewei Wang, Min Liu, Renjun Pei
It is highly demanded to improve the accumulation of NIR theranostic agents in tumor region, which is favorable to the effective phototherapy. IR-780 iodide, a near-infrared (NIR) fluorescence dye, possesses higher and more stable fluorescence intensity than clinically applied dye indocyanine green (ICG), and can be utilized in imaging-guided photothermal therapy with laser irradiation. However, lipophilicity, short circulation time and lack of targeting specificity limit its applications in cancer imaging and therapy...
March 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28303946/preparation-of-ho-3-tm-3-co-doped-lanthanum-tungsten-germanium-tellurite-glass-fiber-and-its-laser-performance-for-2-0%C3%A2-%C3%AE-m
#20
Dechun Zhou, Xuemei Bai, Hang Zhou
Ho(3+)/Tm(3+) co-doped 50TeO2-25GeO2-3WO3-5La2O3-3Nb2O5-5Li2O-9BaF2 glass fiber is prepared with the rod-tube drawing method of 15 μm core diameter and 125 μm inner cladding diameter applied in the 2.0 μm-infrared laser. The 2.0 μm luminescence properties of the core glass are researched and the fluorescence intensity variation for different Tm(3+) doping concentration is systematically analyzed. The results show that the 2.0 μm luminescence of Ho(3+) is greatly influenced by the doping concentration ratio of Ho(3+) to Tm(3+) and that the maximum fluorescence intensity of the core glass can be obtained and its emission cross section can reach 0...
March 17, 2017: Scientific Reports
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