keyword
MENU ▼
Read by QxMD icon Read
search

Carrier

keyword
https://www.readbyqxmd.com/read/29346726/the-effect-of-dielectric-environment-on-doping-efficiency-in-colloidal-pbse-nanostructures
#1
Qinghua Zhao, Tianshuo Zhao, Jiacen Guo, Wenxiang Chen, Mingliang Zhang, Cherie R Kagan
Doping, as a central strategy to control free carrier type and concentration in semiconductor materials, suffers from low efficiency at the nanoscale, especially in systems having high permittivity (ϵ) and large Bohr radii, such as lead chalcogenide nanocrystals (NCs) and nanowires (NWs). Here, we study dielectric confinement effects on the doping efficiency of lead chalcogenides nanostructures by integrating PbSe NWs in the platform of field effect transistors (FETs). Elemental Pb or In or elemental Se is deposited by thermal evaporation to remotely n- or p-dope the NWs...
January 18, 2018: ACS Nano
https://www.readbyqxmd.com/read/29346571/natural-course-of-htlv-1-proviral-dna-levels-in-carriers-during-pregnancy
#2
Naoki Fuchi, Kiyonori Miura, Takashi Tsukiyama, Daisuke Sasaki, Kaori Ishihara, Kazuto Tsuruda, Hiroo Hasegawa, Shoko Miura, Katsumi Yanagihara, Hideaki Masuzaki
The measurement of human T-cell leukemia virus type 1 (HTLV-1) proviral DNA levels using polymerase chain reaction has been beneficial for confirming HTLV-1 infection during pregnancy. However, the influence of pregnancy on HTLV-1 infection and proviral DNA levels among pregnant women with HTLV-1 has not been clarified. We prospectively gathered blood samples from 36 pregnant women who were previously diagnosed as HTLV-1 carriers and sequentially measured their proviral DNA levels. The HTLV-1 proviral DNA levels remained in a plateau during pregnancy but were elevated after delivery...
January 16, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29346521/the-intracellular-and-intercellular-cross-talk-during-subsidiary-cell-formation-in-zea-mays-existing-and-novel-components-orchestrating-cell-polarization-and-asymmetric-division
#3
P Apostolakos, P Livanos, E Giannoutsou, E Panteris, B Galatis
Background: Formation of stomatal complexes in Poaceae is the outcome of three asymmetric and one symmetric cell division occurring in particular leaf protodermal cells. In this definite sequence of cell division events, the generation of subsidiary cells is of particular importance and constitutes an attractive model for studying local intercellular stimulation. In brief, an induction stimulus emitted by the guard cell mother cells (GMCs) triggers a series of polarization events in their laterally adjacent protodermal cells...
January 15, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29346275/a-review-on-recent-advances-in-stabilizing-peptides-proteins-upon-fabrication-in-hydrogels-from-biodegradable-polymers
#4
REVIEW
Faisal Raza, Hajra Zafar, Ying Zhu, Yuan Ren, Aftab -Ullah, Asif Ullah Khan, Xinyi He, Han Han, Md Aquib, Kofi Oti Boakye-Yiadom, Liang Ge
Hydrogels evolved as an outstanding carrier material for local and controlled drug delivery that tend to overcome the shortcomings of old conventional dosage forms for small drugs (NSAIDS) and large peptides and proteins. The aqueous swellable and crosslinked polymeric network structure of hydrogels is composed of various natural, synthetic and semisynthetic biodegradable polymers. Hydrogels have remarkable properties of functionality, reversibility, sterilizability, and biocompatibility. All these dynamic properties of hydrogels have increased the interest in their use as a carrier for peptides and proteins to be released slowly in a sustained manner...
January 18, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/29345989/assembly-of-copi-and-copii-vesicular-coat-proteins-on-membranes
#5
Julien Béthune, Felix T Wieland
In eukaryotes, distinct transport vesicles functionally connect various intracellular compartments. These carriers mediate transport of membranes for the biogenesis and maintenance of organelles, secretion of cargo proteins and peptides, and uptake of cargo into the cell. Transport vesicles have distinct protein coats that assemble on a donor membrane where they can select cargo and curve the membrane to form a bud. A multitude of structural elements of coat proteins have been solved by X-ray crystallography...
January 18, 2018: Annual Review of Biophysics
https://www.readbyqxmd.com/read/29345956/measuring-three-dimensional-strain-and-structural-defects-in-a-single-ingaas-nanowire-using-coherent-x-ray-multi-angle-bragg-projection-ptychography
#6
Megan O Hill, Irene Calvo-Almazan, Mark Allain, Martin Holt, Andrew Ulvestad, Julian Treu, Gregor Koblmueller, Chunyi Huang, Xiaojing Huang, Hanfei Yan, E Nazarestski, Yong S Chu, G Brian Stephenson, Virginie Chamard, Lincoln Lauhon, Stephan O Hruszkewycz
III-As nanowires are candidates for near infrared light emitters and detectors that can be directly integrated onto silicon. However, nanoscale to microscale variations in structure, composition, and strain within a given nanowire, as well as variations between nanowires, pose challenges to correlating microstructure with device performance. In this work, we utilize coherent nano-focused x-rays to characterize stacking defects and strain in a single InGaAs nanowire supported on Si. By reconstructing diffraction patterns from the 2-1-10 Bragg peak, we show that the lattice orientation varies along the length of the wire, while the strain field along the cross-section is largely unaffected, leaving the band structure unperturbed...
January 18, 2018: Nano Letters
https://www.readbyqxmd.com/read/29345949/surface-state-dynamics-dictating-transport-in-inas-nanowires
#7
David Lynall, Selvakumar V Nair, David Gutstein, Alexander Shik, Igor Savelyev, Marina Blumin, Harry E Ruda
Because of their high aspect ratio, nanostructures are particularly susceptible to effects from surfaces such as slow electron trapping by surface states. However, non-equilibrium trapping dynamics have been largely overlooked when considering transport in nanoelectronic devices. In this study, we demonstrate the profound influence of dynamic trapping processes on transport in InAs nanowires through an investigation of the hysteretic and time-dependent behaviour of the transconductance. We observe large densities (∽1013 cm-2) of slow surface traps and demonstrate the ability to control and permanently fix their occupation and charge through electrostatic manipulation by the gate potential followed by thermal deactivation by cryogenic cooling...
January 18, 2018: Nano Letters
https://www.readbyqxmd.com/read/29345934/zein-nanoparticles-as-eco-friendly-carrier-systems-for-botanical-repellents-aiming-sustainable-agriculture
#8
Jhones Luiz Oliveira, Estefania Vangelie Ramos Campos, Anderson do Espirito Santo Pereira, Tatiane Pasquoto, Renata Lima, Renato Grillo, Daniel Junior de Andrade, Fabiano Aparecido Dos Santos, Leonardo F Fraceto
Botanical repellents represent one of the main ways of reducing the use of synthetic pesticides and the contamination of soil and hydric resources. However, the poor stability and rapid degradation of these compounds in the environment hinders their effective application in the field. Zein nanoparticles can be used as eco-friendly carrier systems to protect these substances against premature degradation, provide desirable release characteristics, and reduce toxicity in the environment and to humans. In this study, we describe the preparation and characterization of zein nanoparticles loaded with the main constituents of the essential oil of citronella (geraniol and R-citronellal)...
January 18, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29345733/putative-mechanisms-of-cognitive-decline-with-implications-for-clinical-research-and-practice
#9
Tadeu Oliveira, Angela Starkweather, Divya Ramesh, Joseph Fetta, Debra Lynch Kelly, Debra E Lyon, Lana Sargent
Multiple intrinsic and extrinsic mechanisms contribute to vulnerability of cognitive decline and nurses play a significant role in assisting individuals and families to use strategies for healthy cognitive aging. The objective of this narrative review is to provide a synthesis of the intrinsic and extrinsic mechanisms of cognitive decline and conditions that are associated with cognitive decline. Well-established intrinsic mechanisms of cognitive decline include aging, apolipoprotein E (APOE) ε4 carrier status, SORL1 mutations, neuroinflammation, mitochondrial dysfunction, amyloid deposition, and demyelination...
January 18, 2018: Nursing Forum
https://www.readbyqxmd.com/read/29345732/near-visual-impairment-incidence-in-relation-to-diabetes-in-older-people-the-three-cities-study
#10
Marie Danet-Lamasou, Karine Pérès, Fanny Matharan, Claudine Berr, Isabelle Carrière, Christophe Tzourio, Cécile Delcourt, Isabelle Bourdel-Marchasson
OBJECTIVES: To characterize the relationship between diabetes mellitus (DM) and future risk of near vision impairment (VI) in a community-dwelling population of older people. DESIGN: Seven-year population-based longitudinal study. SETTING: Three-Cities Study, a French prospective study designed to assess the risk of cognitive and functional decline attributable to vascular factors. PARTICIPANTS: Community-dwelling individuals aged 65 and older (N = 8,412)...
January 18, 2018: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29345627/large-area-synthesis-and-photoelectric-properties-of-few-layered-mose-sub-2-sub-on-molybdenum-foils
#11
Zenghui Wu, Guoan Tai, Xufeng Wang, Tingsong Hu, Rui Wang, Wanlin Guo
Compared with MoS2 and WS2, the selenide analogues have narrower band gaps and higher electron mobilities, which make them more applicable to real electrical devices. Besides, few-layered metal selenides have higher electrical conductivity, carrier mobility and light absorption than the corresponding monolayers. However, the large-scale and high-quality growth of few-layered metal selenides remains a significant challenge. Here, we develop a facile method to grow large-area and highly-crystalline few-layered MoSe2 by directly selenizing the Mo foil surfaces at 550 oC within 60 min under ambient pressure...
January 18, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29345599/crystalline-ethylene-oxide-and-propylene-oxide-triblock-copolymer-solid-dispersion-enhance-solubility-stability-and-promoting-time-controllable-release-of-curcumin
#12
Thais Francine Ribeiro Alves, Franciely Lopes, Marcia Rebelo, Juliana Souza, Katiusca Pontes, Carolina Santos, Patricia Severino, Jose Junior, Daniel Komatsu, Marco Vinicius Chaud
AIMS AND BACKGROUND: The design and development of an effective medicine are however often faced with a number of challenges. One of them is the close relationship of drug's bioavailability with solubility, dissolution rate and permeability. The use of curcumin's (CUR) therapeutic potential is limited by its poor water solubility and low chemical stability. The purpose was to evaluate the effect of polymer and solid dispersion (SD) preparation techniques to enhance the aqueous solubility, dissolution rate and stability of the CUR...
January 17, 2018: Recent Patents on Drug Delivery & Formulation
https://www.readbyqxmd.com/read/29345456/pre-occupation-of-empty-carriers-decreases-endo-lysosome-escape-and-reduces-the-protein-delivery-efficiency-of-mesoporous-silica-nanoparticles
#13
Wenqing Li, Liping Sun, Yiqiu Xia, Si-Jie Hao, Gong Cheng, Zhigang Wang, Yuan Wan, Chuandong Zhu, Hongzhang He, Si-Yang Zheng
Endo/lysosome escape is a major challenge in nanoparticles-based protein delivery for cancer therapy. To enhance endo/lysosomal escape and increase the efficacy of proteins delivery, current strategies mainly focuses on destroying endo/lysosomes by employing modified nanoparticles, such as pH-sensitive polyplexes, cell-penetrating peptides, and photosensitive molecules. Herein, we hypothesize that pre-treatment with empty nanocarriers might make endo/lysosomes occupied and affect the endo/lysosomal escape of subsequent protein delivery by nanocarriers...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345446/the-first-south-american-case-of-pre-implantation-genetic-diagnosis-to-select-compatible-embryo-for-cord-blood-transplantation-as-treatment-for-sickle-cell-anemia
#14
Ciro D Martinhago, Kalina Rn Endo, Mariana A Oliveira, Alex Mm Dias, Gislaine S Pereira, Augusto M Azzolini, Paula Rq Estrada, Caio G Bruzaca, Ana Carolina N Martinhago
Sickle cell anemia is an inherited systemic hemoglobinopathy that affects hemoglobin production in red blood cells, leading to early morbidity and mortality. It is caused by a homozygous nucleotide substitution (c.20A>T) in the β-globin gene (HBB) that changes a glutamic acid to a valine in the protein. We present a case report of a fertile couple, both carriers of the sickle cell anemia mutation, with one affected daughter. Six cycles of assisted reproductive techniques were performed, resulting in 53 embryos in cleavage stage...
January 18, 2018: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/29345266/efficient-interfacial-charge-transfer-through-plasmon-sensitized-ag-bi2o3-hierarchical-photoanodes-for-photoelectrocatalytic-degradation-of-chlorinated-phenols
#15
Neerugatti KrishnaRao Eswar, Sangeeta Adhikari, Praveen C Ramamurthy, Giridhar Madras
The present work demonstrates an extremely proficient and robust study of efficient interfacial charge transfer through plasmonic Ag decorated Bi2O3 hierarchical photoanodes for the photoelectrochemical treatment of chlorinated phenols. Unique 2D flake-like Bi2O3 hierarchical nanostructures were grown onto a fluorine-doped tin oxide (FTO) substrate by a simple chemical bath deposition method using triethanolamine as complexing agent. The formation of Bi2O3 on FTO was governed by the decomposition of a nucleated bismuth-hydroxyl complex (Bi2O1-x(OH)x) and modification to the electrode was carried out by the deposition of Ag via a chemical reduction method using hydrazine hydrate...
January 18, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29345248/photo-assisted-hysteresis-of-electronic-transport-for-zno-nanowire-transistors
#16
Qianqian Du, Jiandong Ye, Zhonghua Xu, Shunming Zhu, Kun Tang, Shulin Gu, Youdou Zheng
Recently, ZnO nanowire field effect transistors (FETs) have received renewed interest due to their extraordinary low dimensionality and high sensitivity to external chemical environment and illumination conditions. These prominent properties have the promising potential in the nanoscale chemical and photo-sensors. In this article, we have fabricated ZnO nanowire FETs and have found hysteresis behaviors in their transfer characteristics. The mechanism and dynamics of the hysteresis phenomena have been investigated in detail by varying the sweeping rate and range of the gate bias with and without light irradiation...
January 18, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29345190/magnetoelectric-nanoparticles-for-delivery-of-antitumor-peptides-into-glioblastoma-cells-by-magnetic-fields
#17
Tiffanie S Stewart, Abhignyan Nagesetti, Rakesh Guduru, Ping Liang, Emmanuel Stimphil, Ali Hadjikhani, Luis Salgueiro, Jeffrey Horstmyer, Renzhi Cai, Andrew Schally, Sakhrat Khizroev
AIM: We studied externally controlled anticancer effects of binding tumor growth inhibiting synthetic peptides to magnetoelectric nanoparticles (MENs) on treatment of glioblastomas. METHODS: Hydrothermally synthesized 30-nm MENs had the core-shell composition of CoFe2O4@BaTiO3. Molecules of growth hormone-releasing hormone antagonist of the MIA class (MIA690) were chemically bound to MENs. In vitro experiments utilized human glioblastoma cells (U-87MG) and human brain microvascular endothelial cells...
January 18, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29345051/mir-595-suppresses-the-cellular-uptake-and-cytotoxic-effects-of-methotrexate-by-targeting-slc19a1-in-cem-c1-cells
#18
Shu-Mei Wang, Lu-Lu Sun, Wan-Shui Wu, Dan Yan
The human solute carrier family 19 member 1 (SLC19A1) is the gene coding for reduced folate carrier 1 (RFC1). In our previous work, we showed that the miR-595-related polymorphism, rs1051296 G>T, which was located in the 3'-untranslated region (3'-UTR) of SLC19A1, was associated with high methotrexate (MTX) plasma concentrations in pediatric acute lymphoblastic leukaemia (ALL) patients. The present study aimed to investigate the role of miR-595 in the regulation of SLC19A1 expression and its effects on the cellular uptake and cytotoxicity of MTX in ALL CEM/C1 cells...
January 17, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29344596/superstructure-ta2o5-mesocrystals-derived-from-nh4-2ta2o3f6-mesocrystals-with-efficient-photocatalytic-activity
#19
Xin Yu, Wei Li, Jian Huang, Zhonghua Li, Jiawen Liu, PingAn Hu
Superstructured mesocrystalline Ta2O5 nanosheets were successfully prepared from mesocrystalline (NH4)2Ta2O3F6 nanorods by the annealing method for the first time. The as-prepared mesocrystalline Ta2O5 nanosheets in this work showed remarkable visible light absorption, mainly due to the formation of oxygen vacancy defects in the mesocrystalline Ta2O5 nanosheets, which was also confirmed by XPS spectra, Raman spectra and EPR spectra. Besides, the mesocrystalline Ta2O5 nanosheets showed a highly enhanced photocatalytic activity of 11 268...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29344585/hereditary-folate-malabsorption-due-to-a-mutation-in-the-external-gate-of-the-proton-coupled-folate-transporter-slc46a1
#20
Srinivas Aluri, Rongbao Zhao, Charlotte Lubout, Susanna M I Goorden, Andras Fiser, I David Goldman
Hereditary folate malabsorption (HFM) is an autosomal recessive disorder characterized by impaired intestinal folate absorption and impaired folate transport across the choroid plexus due to loss of function of the proton-coupled folate transporter (PCFT-SLC46A1). We report a novel mutation, causing HFM, affecting a residue located in the 11th transmembrane helix within the external gate. The mutant N411K-PCFT was stable, trafficked to the cell membrane, and had sufficient residual activity to characterize the transport defect and the structural requirements at this site for gate function...
January 9, 2018: Blood Advances
keyword
keyword
57663
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"