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PubMed Journals Articles About "Electron Microscopy Project Could Revolutionize Search Drugs" RSS

17:38 EDT 25th June 2019 | BioPortfolio

Electron Microscopy Project Could Revolutionize Search Drugs PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Electron Microscopy Project Could Revolutionize Search Drugs articles that have been published worldwide.

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Showing "Electron microscopy project could revolutionize search drugs" PubMed Articles 1–25 of 14,000+

Correlative Light and Electron Microscopy of Autophagosomes.

Live-cell imaging has been widely used to study autophagosome biogenesis and maturation. When combined with correlative electron microscopy, this approach can be extended to reveal ultrastructural details in three dimensions. The resolution of electron microscopy is needed when membrane contact sites and tubular connections between organelles are studied.


Electron tomography in plant cell biology.

Electron tomography (ET) approaches are based on the imaging of a biological specimen at different tilt angles by transmission electron microscopy (TEM). ET can be applied to both plastic-embedded and frozen samples. Technological advancements in TEM, direct electron detection, automated image collection, and imaging processing algorithms allow for 2-7-nm scale axial resolution in tomographic reconstructions of cells and organelles. In this review, we discussed the application of ET in plant cell biology an...

Neurofilament-histomorphometry comparison in the evaluation of unmyelinated axon regeneration following peripheral nerve injury: an alternative to electron microscopy.

Currently, assessment of unmyelinated axon regeneration is limited to electron microscopy (EM), which is expensive, time consuming and not universally available. This study presents a protocol to estimate the number of unmyelinated axons in a regenerating peripheral nerve without the need for electron microscopy.


Development of novel correlative light and electron microscopy linkage system using silicon nitride film.

In this study, we investigated the optical properties of a silicon nitride (SiN) film. The thin SiN film (30 nm thick) exhibited good light transmittance and little autofluorescence and could be used as a microscope slide for optical microscopy (OM). In addition, we developed a novel correlative light and electron microscopy (CLEM) that combines OM with transmission electron microscopy (TEM) using an SiN thin film. In this system, CLEM was performed by replacing a detachable retainer with a holder for TEM a...

Release of ciprofloxacin drugs by nano gold embedded cellulose grafted polyacrylamide hybrid nanocomposite hydrogels.

The present work involves the designing of the porous nano gold embedded cellulose grafted polyacrylamide (PAM/C/Au) nanocomposite hydrogel which has been prepared by in situ polymerization process with an objective of application for the in vitro release of ciprofloxacin drugs. The structure, composition, morphology behaviour of the nanocomposite hydrogels are explored using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction study (XRD), X-ray photoelectron spectroscopy (XPS); field emission...

Design and simulation of a linear electron cavity for quantum electron microscopy.

Quantum electron microscopy (QEM) is a measurement approach that could reduce sample radiation damage, which represents the main obstacle to sub-nanometer direct imaging of molecules in conventional electron microscopes. This method is based on the exploitation of interaction-free measurements in an electron resonator. In this work, we present the design of a linear resonant electron cavity, which is at the core of QEM. We assess its stability and optical properties during resonance using ray-tracing electr...

First Direct Search for Inelastic Boosted Dark Matter with COSINE-100.

A search for inelastic boosted dark matter (IBDM) using the COSINE-100 detector with 59.5 days of data is presented. This relativistic dark matter is theorized to interact with the target material through inelastic scattering with electrons, creating a heavier state that subsequently produces standard model particles, such as an electron-positron pair. In this study, we search for this electron-positron pair in coincidence with the initially scattered electron as a signature for an IBDM interaction. No exc...

Experimental steering of electron microscopy studies using prior X-ray computed tomography.

Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) can provide unrivalled high-resolution images of specific features and volumes of interest. However, the regions interrogated are typically very small, and sample preparation is both time-consuming and destructive. Here we consider how prior X-ray micro-computed tomography (microCT) presents an opportunity to increase the efficiency of electron microscopy in biology. We demonstrate how it can be used to; select the most promising ...

Correlative Light and Electron Microscopy to Analyze LC3 Proteins in Caenorhabditis elegans Embryo.

In this chapter, we present a protocol to perform correlative light and electron microscopy (CLEM) on Caenorhabditis elegans embryos. We use a specific fixation method which preserves both the GFP fluorescence and the structural integrity of the samples. Thin sections are first analyzed by light microscopy to detect GFP-tagged proteins, then by transmission electron microscopy (TEM) to characterize the ultrastructural anatomy of cells. The superimposition of light and electron images allows to determine the...

Metal organic framework HKUST-1 modified with carboxymethyl-β-cyclodextrin for use in improved open tubular capillary electrochromatographic enantioseparation of five basic drugs.

This work shows that the metal organic framework (MOF) HKUST-1 of type Cu(BTC) (also referred to as MOF-199; a face-centered-cubic MOF containing nanochannels) is a most viable coating for use in enantioseparation in capillary electrochromatography (CEC). A HKUST-1 modified capillary was prepared and characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectra, elemental analysis and thermogravimetric analysis. CEC-based enantioseparation of the basic d...

Efficient first principles simulation of electron scattering factors for transmission electron microscopy.

Electron microscopy is a powerful tool for studying the properties of materials down to their atomic structure. In many cases, the quantitative interpretation of images requires simulations based on atomistic structure models. These typically use the independent atom approximation that neglects bonding effects, which may, however, be measurable and of physical interest. Since all electrons and the nuclear cores contribute to the scattering potential, simulations that go beyond this approximation have relied...

Considerations for imaging thick, low contrast, and beam sensitive samples with liquid cell transmission electron microscopy.

Transmission electron microscopy of whole cells is hindered by the inherently large thickness and low atomic contrast intrinsic of cellular material. Liquid cell transmission electron microscopy allows samples to remain in their native hydrated state and may permit visualizing cellular dynamics in-situ. However, imaging biological cells with this approach remains challenging and identifying an optimal imaging regime using empirical data would help foster new advancements in the field. Recent questions about...

Sample Preparation of Extracellular Matrix of Murine Colons for Scanning Electron Microscopy.

Scanning electron microscopy is a useful tool for high-resolution morphological characterization of the extracellular matrix. In certain tissues and surfaces, imaging of the extracellular matrix requires cell removal before sample preparation. In this protocol, we will describe a method for preparing extracellular matrices derived from murine colon for imaging under a scanning electron microscope.

Taxonomic study of Triblemma by using light and scanning electron microscopy.

Triblemma Ching is a genus proposed by Ching Ren-Chang in 1978, and it is composed of two species, Triblemma lancea (Thunb.) Ching and Triblemma zeylanica (Hook.) Ching. There has been much debate on the systematic position of Triblemma, and this genus has always been included in Diplazium. Here, we have described new features of tracheary elements, epidermis, spore, scale, and rachis of Triblemma revealed using light and scanning electron microscopy and proposed that Triblemma is closely related to Athyrio...

Antibodies raised against aldehyde-fixed antigens improve sensitivity for postembedding electron microscopy.

Antibodies are one of the most important tools in biological research. High specificity and sensitivity of antibodies are crucial to obtain reliable results. Tissue fixed with glutaraldehyde (GA) is commonly used in electron microscopical investigations. The fixation and embedding routine in preparation of tissue for post-embedding electron microscopy (EM) will mask and structurally alter epitopes, making antibody-antigen interaction inefficient, with low labeling intensities. One of the main factors in thi...

Microstructure of long period stacking ordered phase in an as-cast Mg-Ni-Zn-Dy alloy.

An as-cast Mg-5Ni-4Zn-1Dy (wt.%) alloy was prepared by traditional ingot metallurgy. Transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) were used to study the microstructural characteristics of 14H LPSO phase in the as-cast Mg-5Ni-4Zn-1Dy (wt.%) alloy. Selected-area electron diffraction, convergent-beam electron diffraction, energy dispersive spectrum and high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM) and atomic-resolution ener...

Reliability of information about the use of antiepileptic drugs during pregnancy from three major web search engines in China.

The objective of this study was to assess the reliability of online information, as provided by three major search engines in China, about the usage of antiepileptic drugs (AEDs) during pregnancy.

A 0.5-T pure-in-plane-field magnetizing holder for in-situ Lorentz microscopy.

A side-entry specimen holder capable of applying a 0.5-tesla in-plane magnetic-induction field for in-situ transmission electron microscopy was developed. Three miniaturized electromagnets with 300 × 300-µm pole area and 180-µm pole gap are stacked along the electron-beam path in the holder. The middle magnet is used for magnetizing the specimen, which is inserted into the pole gap by using a 40-µm-width cantilever for atomic-force microscopy. The upper and lower magnets are used to keep the electro...

Emerging Electron Microscopy Techniques for Probing Functional Interfaces in Energy Materials.

Interfaces play a fundamental role in many areas of chemistry. However, their localized nature requires characterization techniques with high spatial resolution in order to fully understand their structure and properties. State-of-the-art atomic resolution or in situ scanning transmission electron microscopy and electron energy-loss spectroscopy are indispensable tools for characterizing the local structure and chemistry of materials with single-atom resolution, but they are not able to measure many propert...

Visualization of biological macromolecules at near-atomic resolution: cryo-electron microscopy comes of age.

Structural biology is going through a revolution as a result of transformational advances in the field of cryo-electron microscopy (cryo-EM) driven by the development of direct electron detectors and ultrastable electron microscopes. High-resolution cryo-EM images of isolated biomolecules (single particles) suspended in a thin layer of vitrified buffer are subjected to powerful image-processing algorithms, enabling near-atomic resolution structures to be determined in unprecedented numbers. Prior to these a...

Electron-Driven In Situ Transmission Electron Microscopy of 2D Transition Metal Dichalcogenides and Their 2D Heterostructures.

Investigations on monolayered transition metal dichalcogenides (TMDs) and TMD-heterostructures have been steadily increasing over the last years due to their potential application in a wide variety of fields such as micro-electronics, sensors, batteries, solar cells and supercapacitors, among others. The present work focuses on the characterization of TMDs using transmission electron microscopy, which allows not only static atomic resolution but also investigations in to the dynamic behavior of atoms within...

Cryo Electron Microscopy of TRP Channels.

Cryo electron microscopy (cryo-EM) is a powerful technique that can be used to elucidate the structural architecture of a protein molecule in a physiologically relevant environment. In this method, purified protein is frozen in its aqueous buffer in a thin layer of vitreous ice in which the biological macromolecules are embedded in various orientations. Images of this frozen sample are collected with an electron microscope, and the data is processed using different software algorithms resulting in high-reso...

Standard Preparation Protocol of Human Skin Samples for Transmission Electron Microscopy.

This chapter is intended to be a guide to skin studies dealing with the analysis of subcellular structures of cells and tissues by providing an exhaustive sample preparation protocol for transmission electron microscopy (TEM). Critical steps to obtain good ultrastructure are mentioned as well as notes to improve the sample collection. New ways to automatize the imaging acquisition are discussed.

Exfoliation fibrils within the basement membrane of anterior lens capsule: a transmission electron microscopy study.

The aim of the present study was to demonstrate novel findings recognized within the basement membrane of the anterior lens capsules (aLCs) in exfoliation syndrome, in a transmission electron microscopy (TEM) study.

Cellular Imaging of Intracellular Bacterial Pathogens.

The spatial dimensions of host cells and bacterial microbes are perfectly suited to being studied by microscopy techniques. Therefore, cellular imaging has been instrumental in uncovering many paradigms of the intracellular lifestyle of microbes. Initially, microscopy was used as a qualitative, descriptive tool. However, with the onset of specific markers and the power of computer-assisted image analysis, imaging can now be used to gather quantitative data on biological processes. This makes imaging a drivi...


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