The morphological structure in different parts of XLPE high voltage cables

1982 ◽  
Author(s):  
S. Grzybowski ◽  
E. Robles ◽  
O. Dorlanne
Keyword(s):  
High Voltage ◽  
Morphological Structure ◽  
Different Parts

scholarly journals Study on the Chalkiness Character of Giant Embryo Rice and Observation on Its Microstructure in Grains

2020 ◽  
Vol 12 (8) ◽  
pp. 171
Author(s):  
Bo Peng ◽  
Kun He ◽  
Kun Xu ◽  
Dong-Ying Tang ◽  
Juan Peng ◽  
...  
Keyword(s):  
Morphological Structure ◽  
Starch Granules ◽  
Rice Varieties ◽  
Nutritional Qualities ◽  
New Varieties ◽  
Solid Foundation ◽  
The Relationship ◽  
Different Parts ◽  
Grain Chalkiness ◽  
Giant Embryo

Grain chalkiness greatly affects the grain appearance and milling, eating, cooking, and nutritional qualities, thus it is one of the most important traits of grain qualities. Based on the study of chalkiness characters in endosperm of different giant embryo rice, the relationship between the differences of chalkiness characters in endosperm of different giant embryo rice and the morphological structure, arrangement and development of starch granules in endosperm was clarified, which will lay a solid foundation for further revealing the formation mechanism of chalkiness characters in giant embryo rice and cultivating excellent new varieties of giant embryo rice. In this study, the chalkiness of endosperm (including chalkiness rate, chalkiness degree and chalkiness area) of 16 different rice varieties were investigated and analyzed. The results showed that the chalkiness of endosperm was closely related to the morphological structure and arrangement of starch granules in endosperm cells of different kinds of giant embryo rice, and there were significant differences between the chalkiness of different parts of the same giant embryo rice and the morphological structure and arrangement of starch granules in endosperm cells. Therefore, the results of this study will provide important information for the improvement of quality characters and the breeding of new rice varieties.

For Phillip: Remembering a Friend

2020 ◽  
Vol 45 (3) ◽  
pp. 358-361
Author(s):  
RUSTOM BHARUCHA
Keyword(s):  
High Voltage ◽  
Martial Arts ◽  
The State ◽  
Second Home ◽  
Full Circle ◽  
The World ◽  
Mind's Eye ◽  
The Town ◽  
Different Parts

It is going to take some time for me to fully accept that Phillip Zarrilli is no more. Phillip, as I knew him as a friend, continues to live in my mind's eye with memories of ceaseless conversations, exchanges of letters and interactions in different parts of the world. Just three months before his death on 28 April 2020, we had met in Kerala, his second home, in the town of Kunnamkulam, where we had watched a high-voltage, virtuoso performance of the Kathakali play Duryodhanavadham (The Killing of Duryodhana) by the Kerala Kalamandalam troupe, which we thoroughly relished. I have rarely seen Phillip more relaxed and happy as I remember him in Kunnamkulam. While he was, in all probability, aware that this was going to be his last trip to Kerala, he was making the most of it, reminding us that he had come full circle by returning to the state which had nurtured his initiation into the martial arts tradition of kalarippayyattu.

scholarly journals IMPACTS OF STATIC ELECTRIC FIELD PRODUCED BY ULTRA-HIGH-VOLTAGE DIRECT-CURRENT TRANSMISSION LINES ON HIPPOCAMPAL PROTEIN EXPRESSION AND MORPHOLOGICAL STRUCTURE IN MICE

2021 ◽  
Author(s):  
JINGTONG YU ◽  
CHUNXIA ZHAO ◽  
XIAOYU GU ◽  
GUOQING DI ◽  
YAQIAN XU
Keyword(s):  
Body Weight ◽  
Electric Field ◽  
Protein Expression ◽  
High Voltage ◽  
Direct Current ◽  
Transmission Lines ◽  
Morphological Structure ◽  
Static Electric Field ◽  
Expression Levels ◽  
High Voltage Direct Current

Static electric field (SEF) from ultra-high-voltage direct-current (UHVDC) transmission lines has the potential to produce neurobiological effects. To explore these effects and elucidate their potential mechanisms, protein expression levels and morphological structure in the hippocampi of mice were investigated after SEF exposure. Mice from the Institute of Cancer Research were exposed to an environmental SEF induced by UHVDC transmission lines with the strength of 9.20–21.85[Formula: see text]kV/m for 35 days. Mouse body weight was measured weekly during the exposure. After the exposure, hippocampal Ca[Formula: see text]/calmodulin-dependent protein kinase II (CaMKII) and calcineurin (CaN) expression levels were assayed by Western blot. Hippocampal pathologic morphology and ultrastructure were observed using light microscopy and transmission electron microscopy, respectively. No significant differences in body weight, CaMKII and CaN expression levels, and hippocampal pathologic morphology were observed between mice in the exposed and the control groups. However, cytoplasmic vacuolization of the hippocampal neurons was observed in the exposed group. Thus, hippocampal neuron ultrastructure damage may be a mechanism of SEF-exposure-induced memory decline in mice.

scholarly journals DIACHRONIC APPROACH TO CONVERSION IN THE ENGLISH LANGUAGE

2021 ◽  
Vol 5 (3(84)) ◽  
pp. 16-18
Author(s):  
N. Guliyeva
Keyword(s):  
Historical Development ◽  
English Language ◽  
Morphological Structure ◽  
Word Formation ◽  
Structural Relationship ◽  
Basic Form ◽  
Parts Of Speech ◽  
New Words ◽  
Diachronic Analysis ◽  
Different Parts

The article investigates conversion as a means of forming new words without adding any derivative element, when the basic form of the original and the basic derived words are homonymous having the same morphological structure, but belonging to different parts of speech. It is said that In the course of the historical development grammatical forms in English were lost and there exists no inflexion to distinguish the form of the verb from a noun and this is considering as widespread word formation in English. It also studies conversion being a type of word-building – not a pattern of structural relationship. Synchronically both types – a noun and a verb must be treated together as cases of patterned homonymy, while studying diachronically, it is essential to differentiate the cases of conversion and treat them separately. It is emphasized that it is not easy to say definitely which of the members was derived, the results of synchronic and diachronic analysis may not coincide. That means that what is understood under conversion in Modern English does not fully and necessarily coincide with earlier periods of the development of the language.

High Voltage Electron Microscopy of Ion-Milled Dental Enamel

1974 ◽  
Vol 32 ◽  
pp. 60-61
Author(s):  
L. D. Ackerman ◽  
S. H. Y. Wei
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Third Molar ◽  
Polarized Light ◽  
Dental Enamel ◽  
Longitudinal Section ◽  
Ion Milling ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron

Mature human dental enamel has presented investigators with several difficulties in ultramicrotomy of specimens for electron microscopy due to its high degree of mineralization. This study explores the possibility of combining ion-milling and high voltage electron microscopy as a means of circumventing the problems of ultramicrotomy.A longitudinal section of an extracted human third molar was ground to a thickness of about 30 um and polarized light micrographs were taken. The specimen was attached to a single hole grid and thinned by argon-ion bombardment at 15° incidence while rotating at 15 rpm. The beam current in each of two guns was 50 μA with an accelerating voltage of 4 kV. A 20 nm carbon coating was evaporated onto the specimen to prevent an electron charge from building up during electron microscopy.

Three-Dimensional Visualization of the T-System of Frog Muscle Using High Voltage Electron Microscopy and a Lanthanum Stain

1977 ◽  
Vol 35 ◽  
pp. 570-571 ◽  
Author(s):  
Lee D. Peachey ◽  
Clara Franzini-Armstrong
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Three Dimensional ◽  
Biological Tissues ◽  
High Voltage Electron Microscopy ◽  
Transverse Tubular System ◽  
Peroxidase Reaction ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
T System

The effective study of biological tissues in thick slices of embedded material by high voltage electron microscopy (HVEM) requires highly selective staining of those structures to be visualized so that they are not hidden or obscured by other structures in the image. A tilt pair of micrographs with subsequent stereoscopic viewing can be an important aid in three-dimensional visualization of these images, once an appropriate stain has been found. The peroxidase reaction has been used for this purpose in visualizing the T-system (transverse tubular system) of frog skeletal muscle by HVEM (1). We have found infiltration with lanthanum hydroxide to be particularly useful for three-dimensional visualization of certain aspects of the structure of the T- system in skeletal muscles of the frog. Specifically, lanthanum more completely fills the lumen of the tubules and is denser than the peroxidase reaction product.

Resolution, Contrast and Interpretation of HVEM Images of Crystals

1973 ◽  
Vol 31 ◽  
pp. 228-229
Author(s):  
L. E. Thomas ◽  
J. S. Lally ◽  
R. M. Fisher
Keyword(s):  
High Voltage ◽  
Chromatic Aberration ◽  
Crystalline Materials ◽  
Resolution Parameter ◽  
Instrument Resolution ◽  
Imaging Conditions ◽  
Beam Excitation ◽  
Optimum Imaging

In addition to improved penetration at high voltage, the characteristics of HVEM images of crystalline materials are changed markedly as a result of many-beam excitation effects. This leads to changes in optimum imaging conditions for dislocations, planar faults, precipitates and other features.Resolution - Because of longer focal lengths and correspondingly larger aberrations, the usual instrument resolution parameter, CS174 λ 374 changes by only a factor of 2 from 100 kV to 1 MV. Since 90% of this change occurs below 500 kV any improvement in “classical” resolution in the MVEM is insignificant. However, as is widely recognized, an improvement in resolution for “thick” specimens (i.e. more than 1000 Å) due to reduced chromatic aberration is very large.

Radiation-Induced Precipitation at Thin Foil Surfaces in Ni-Be Alloys

1982 ◽  
Vol 40 ◽  
pp. 598-599
Author(s):  
T. Mukai ◽  
T. E. Mitchell
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Electron Irradiation ◽  
High Vacuum ◽  
Thin Foil ◽  
Homogeneous Precipitation ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Radiation Induced

Radiation-induced homogeneous precipitation in Ni-Be alloys was recently observed by high voltage electron microscopy. A coupling of interstitial flux with solute Be atoms is responsible for the precipitation. The present investigation further shows that precipitation is also induced at thin foil surfaces by electron irradiation under a high vacuum.

The Reduction of Chromatic Aberrations Due to Instrumental Instabilities

1971 ◽  
Vol 29 ◽  
pp. 14-15
Author(s):  
J. S. Lally ◽  
R. Evans
Keyword(s):  
Electron Microscope ◽  
High Voltage ◽  
Focal Length ◽  
Chromatic Aberration ◽  
Objective Lens ◽  
Usual Practice ◽  
Voltage Electron ◽  
Short Focal Length ◽  
Chromatic Aberrations ◽  
Electron Microscopes

One of the instrumental factors often limiting the resolution of the electron microscope is image defocussing due to changes in accelerating voltage or objective lens current. This factor is particularly important in high voltage electron microscopes both because of the higher voltages and lens currents required but also because of the inherently longer focal lengths, i.e. 6 mm in contrast to 1.5-2.2 mm for modern short focal length objectives.The usual practice in commercial electron microscopes is to design separately stabilized accelerating voltage and lens supplies. In this case chromatic aberration in the image is caused by the random and independent fluctuations of both the high voltage and objective lens current.

Some Biological Applications of High Voltage Electron Microscopy

1974 ◽  
Vol 32 ◽  
pp. 298-299
Author(s):  
Hans Ris
Keyword(s):  
High Voltage ◽  
Chromosome Structure ◽  
Nerve Fibers ◽  
Good Resolution ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
University Of Wisconsin ◽  
High Voltage Electron ◽  
One Year ◽  
The University

The High Voltage Electron Microscope Laboratory at the University of Wisconsin has been in operation a little over one year. I would like to give a progress report about our experience with this new technique. The achievement of good resolution with thick specimens has been mainly exploited so far. A cold stage which will allow us to look at frozen specimens and a hydration stage are now being installed in our microscope. This will soon make it possible to study undehydrated specimens, a particularly exciting application of the high voltage microscope.Some of the problems studied at the Madison facility are: Structure of kinetoplast and flagella in trypanosomes (J. Paulin, U. of Georgia); growth cones of nerve fibers (R. Hannah, U. of Georgia Medical School); spiny dendrites in cerebellum of mouse (Scott and Guillery, Anatomy, U. of Wis.); spindle of baker's yeast (Joan Peterson, Madison) spindle of Haemanthus (A. Bajer, U. of Oregon, Eugene) chromosome structure (Hans Ris, U. of Wisconsin, Madison). Dr. Paulin and Dr. Hanna are reporting their work separately at this meeting and I shall therefore not discuss it here.

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