scholarly journals Engineering proteinaceous colloidosomes as enzyme carrier for efficient and recyclable Pickering interfacial biocatalysis

2021 ◽  
Author(s):  
To Ngai ◽  
Hang Jiang ◽  
Xiaofeng Hu ◽  
Yunxing Li ◽  
Cheng Yang
Keyword(s):  
Single Particle ◽  
Emulsion System ◽  
First Time

Despite Pickering interfacial biocatalysis has been a popular topic in biphasic biocatalysis, the water-in-oil (w/o) emulsion system stabilized by single particle remains a challenge. For the first time, hydrophobized proteinaceous...

scholarly journals Laser illumination-induced dramatic catalytic activity change on Au nanospheres

2019 ◽  
Vol 10 (22) ◽  
pp. 5793-5800 ◽  
Author(s):  
Zhongju Ye ◽  
Lin Wei ◽  
Lehui Xiao ◽  
Jianfang Wang
Keyword(s):  
Catalytic Activity ◽  
Symmetry Breaking ◽  
Gold Nanoparticle ◽  
Single Particle ◽  
Catalytic Properties ◽  
Activity Change ◽  
Laser Illumination ◽  
Single Particle Level ◽  
Particle Level ◽  
First Time

In this work, the distinct catalytic properties of a single gold nanoparticle (GNP) after symmetry breaking were disclosed at the single-particle level for the first time.

STUDY OF SINGLE-PARTICLE RESONANT STATES

2004 ◽  
Vol 19 (20) ◽  
pp. 1537-1545 ◽  
Author(s):  
SHISHENG ZHANG
Keyword(s):  
Single Particle ◽  
Effective Interaction ◽  
Random Phase ◽  
Mean Field ◽  
Coupling Constant ◽  
Relativistic Mean Field ◽  
Resonant States ◽  
Scattering Phase ◽  
First Time ◽  
Phase Shift Method

Energies and widths for single-particle resonant states in the continuum in 120 Sn , as the necessary input quantities of relativistic random phase approximation for the investigation of isoscalar giant octupole resonance, are determined by analytic continuation in the coupling constant (ACCC) method within the framework of self-consistent relativistic mean field (RMF) theory for the first time. For the effective interaction NL3, the results in this scheme agree well with those of scattering phase shift method on the basis of RMF. Similar calculations are carried out in neutron-rich nucleus 84 Ni .

scholarly journals Detection and characterization of biogenic selenium nanoparticles in selenium-rich yeast by single particle ICPMS

2018 ◽  
Vol 33 (3) ◽  
pp. 452-460 ◽  
Author(s):  
Javier Jiménez-Lamana ◽  
Isabel Abad-Álvaro ◽  
Katarzyna Bierla ◽  
Francisco Laborda ◽  
Joanna Szpunar ◽  
...  
Keyword(s):  
Single Particle ◽  
Selenium Nanoparticles ◽  
First Time ◽  
Biogenic Selenium Nanoparticles

The occurrence of SeNPs in commercial Se-rich yeasts was confirmed by SP-ICPMS for the first time.

scholarly journals Single particle ICP-MS and GC-MS provide a new insight into the formation mechanisms during the green synthesis of AgNPs

2019 ◽  
Vol 43 (9) ◽  
pp. 3946-3955 ◽  
Author(s):  
Huiling Zhang ◽  
Yuxiong Huang ◽  
Jianqiang Gu ◽  
Arturo Keller ◽  
Yuwei Qin ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Single Particle ◽  
Formation Mechanisms ◽  
Formation Kinetics ◽  
Icp Ms ◽  
First Time ◽  
Insight Into

For the first time, the formation kinetics and responsible metabolites during the green synthesis of AgNPs were elucidated by sp-ICP-MS and GC-MS.

scholarly journals In-Line Holography in Transmission Electron Microscopy for the Atomic Resolution Imaging of Single Particle of Radiation-Sensitive Matter

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1413 ◽  
Author(s):  
Elvio Carlino
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Single Particle ◽  
Soft Matter ◽  
Materials Science ◽  
Inorganic Materials ◽  
Atomic Resolution ◽  
Transmission Electron ◽  
Resolution Imaging ◽  
First Time

In this paper, for the first time it is shown how in-line holography in Transmission Electron Microscopy (TEM) enables the study of radiation-sensitive nanoparticles of organic and inorganic materials providing high-contrast holograms of single nanoparticles, while illuminating specimens with a density of current as low as 1–2 e−Å−2s−1. This provides a powerful method for true single-particle atomic resolution imaging and opens up new perspectives for the study of soft matter in biology and materials science. The approach is not limited to a particular class of TEM specimens, such as homogenous samples or samples specially designed for a particular TEM experiment, but has better application in the study of those specimens with differences in shape, chemical composition, crystallography, and orientation, which cannot be currently addressed at atomic resolution.

scholarly journals Directional Correlations of Gamma Rays in the Decay of 36 hr 82Br

1968 ◽  
Vol 21 (5) ◽  
pp. 649 ◽  
Author(s):  
SL Gupta ◽  
MM Bajaj
Keyword(s):  
Gamma Rays ◽  
Single Particle ◽  
Spin Assignment ◽  
First Time ◽  
Rotor Model ◽  
Unique Spin

Coincidence and gamma-gamma directional correlation measurements are made for the 10 cascades of s2Kr: 1648-777, 1008-1044, 1317-777, 619-1475, 555-1317,555-619,828-1044,828-(1044)-777,698-777, and 619-698 keV, of which the cascade 1008-1044 keV has been attempted for the first time. The results permit a unique spin assignment of 5 for the 2829 ke V level from the directional correlation of the 1008-1044 keV cascade and a spin of 3 to the level at 2425 keV from that of the 1648-777 keV cascade. Multipole character and admixture are determined for the transitions 1648, 1475, 1044, 1008, 555, 828, 698, 619, and 1317 keV. Computed E2 partial half-lives for the last two transitions are compared with the predictions of the single-particle estimate and the nonaxial rotor model.

scholarly journals Protective Measurement—A New Quantum Measurement Paradigm: Detailed Description of the First Realization

2021 ◽  
Vol 11 (9) ◽  
pp. 4260
Author(s):  
Enrico Rebufello ◽  
Fabrizio Piacentini ◽  
Alessio Avella ◽  
Rudi Lussana ◽  
Federica Villa ◽  
...  
Keyword(s):  
Quantum Measurement ◽  
Single Particle ◽  
Weak Interactions ◽  
Sharp Contrast ◽  
Protection Mechanism ◽  
Expectation Value ◽  
Measurement Protocol ◽  
Quantum Technology ◽  
First Time ◽  
Measured State

We present a detailed description of the experiment realizing for the first time a protective measurement, a novel measurement protocol which combines weak interactions with a “protection mechanism” preserving the measured state coherence during the whole measurement process. Furthermore, protective measurement allows finding the expectation value of an observable, i.e., an inherently statistical quantity, by measuring a single particle, without the need for any statistics. This peculiar property, in sharp contrast to the framework of traditional (projective) quantum measurement, might constitute a groundbreaking advance for several quantum technology related fields.

Localization of immunolabels by electron microscopy and image averaging

1983 ◽  
Vol 41 ◽  
pp. 282-283
Author(s):  
J. Frank ◽  
P.-Y. Sizaret ◽  
A. Verschoor ◽  
J. Lamy
Keyword(s):  
Electron Microscopy ◽  
Single Particle ◽  
Attachment Site ◽  
Uranyl Acetate ◽  
Limulus Polyphemus ◽  
Resolution Limit ◽  
Electron Microscopic ◽  
Image Averaging ◽  
Top View ◽  
Better Than

The accuracy with which the attachment site of immunolabels bound to macromolecules may be localized in electron microscopic images can be considerably improved by using single particle averaging. The example studied in this work showed that the accuracy may be better than the resolution limit imposed by negative staining (∽2nm).The structure used for this demonstration was a halfmolecule of Limulus polyphemus (LP) hemocyanin, consisting of 24 subunits grouped into four hexamers. The top view of this structure was previously studied by image averaging and correspondence analysis. It was found to vary according to the flip or flop position of the molecule, and to the stain imbalance between diagonally opposed hexamers (“rocking effect”). These findings have recently been incorporated into a model of the full 8 × 6 molecule.LP hemocyanin contains eight different polypeptides, and antibodies specific for one, LP II, were used. Uranyl acetate was used as stain. A total of 58 molecule images (29 unlabelled, 29 labelled with antl-LPII Fab) showing the top view were digitized in the microdensitometer with a sampling distance of 50μ corresponding to 6.25nm.

Annulate lamellae in the Sertoli cells of guinea pig testis after unilateral torsion of the spermatic cord

1984 ◽  
Vol 42 ◽  
pp. 196-197
Author(s):  
J. Chakraborty ◽  
A. P. Sinha Hikim ◽  
J. S. Jhunjhunwala
Keyword(s):  
Sertoli Cells ◽  
Guinea Pigs ◽  
Spermatic Cord ◽  
Present Report ◽  
Cell Types ◽  
Annulate Lamellae ◽  
Spermatogenic Cells ◽  
Electron Microscopic ◽  
Structural Details ◽  
First Time

Although the presence of annulate lamellae was noted in many cell types, including the rat spermatogenic cells, this structure was never reported in the Sertoli cells of any rodent species. The present report is based on a part of our project on the effect of torsion of the spermatic cord to the contralateral testis. This paper describes for the first time, the fine structural details of the annulate lamellae in the Sertoli cells of damaged testis from guinea pigs.One side of the spermatic cord of each of six Hartly strain adult guinea pigs was surgically twisted (540°) under pentobarbital anesthesia (1). Four months after induction of torsion, animals were sacrificed, testes were excised and processed for the light and electron microscopic investigations. In the damaged testis, the majority of seminiferous tubule contained a layer of Sertoli cells with occasional spermatogonia (Fig. 1). Nuclei of these Sertoli cells were highly pleomorphic and contained small chromatinic clumps adjacent to the inner aspect of the nuclear envelope (Fig. 2).

Electron spectroscopic imaging and diffraction

1991 ◽  
Vol 49 ◽  
pp. 706-707
Author(s):  
M. Rühle ◽  
J. Mayer ◽  
J.C.H. Spence ◽  
J. Bihr ◽  
W. Probst ◽  
...  
Keyword(s):  
Materials Science ◽  
Electron Spectroscopic Imaging ◽  
Magnetic Filter ◽  
Magnetic Imaging ◽  
Illumination System ◽  
Probe Size ◽  
Diffraction Patterns ◽  
Fritz Haber ◽  
Koehler Illumination ◽  
First Time

A new Zeiss TEM with an imaging Omega filter is a fully digitized, side-entry, 120 kV TEM/STEM instrument for materials science. The machine possesses an Omega magnetic imaging energy filter (see Fig. 1) placed between the third and fourth projector lens. Lanio designed the filter and a prototype was built at the Fritz-Haber-Institut in Berlin, Germany. The imaging magnetic filter allows energy-filtered images or diffraction patterns to be recorded without scanning using efficient area detection. The energy dispersion at the exit slit (Fig. 1) results in ∼ 1.5 μm/eV which allows imaging with energy windows of ≤ 10 eV. The smallest probe size of the microscope is 1.6 nm and the Koehler illumination system is used for the first time in a TEM. Serial recording of EELS spectra with a resolution < 1 eV is possible. The digital control allows X,Y,Z coordinates and tilt settings to be stored and later recalled.

Sign in / Sign up

Export Citation Format

Share Document