scholarly journals Experimental Studies on Parasitization by Apanteles glomeratus L. (Hymenoptera : Braconidae) : III. Comparison of Parasitization Potential among Females of Different Origins

1978 ◽  
Vol 13 (2) ◽  
pp. 76-83 ◽  
Author(s):  
Yoshibumi SATO
Keyword(s):  
Experimental Studies ◽  
Apanteles Glomeratus ◽  
Different Origins

Experimental studies on the columella-capsular interrelationship in the turtle Chelydra serpentina

Development ◽  
1965 ◽  
Vol 14 (3) ◽  
pp. 265-272
Author(s):  
M. J. Toerien
Keyword(s):  
Experimental Studies ◽  
Fundamental Importance ◽  
Chelydra Serpentina ◽  
Reciprocal Effect ◽  
Early Embryos ◽  
Vast Literature ◽  
Different Origins ◽  
Auditory Capsule

The reciprocal effect of two neighbouring structures of different origins on each other during development is of considerable interest to the embryologist. Such a relationship exists between the columella auris and the auditory capsule in the vicinity of the fenestra ovalis. This particular relationship, in addition, embraces an aspect of fundamental importance to the morphologist viz. the possible derivation of part of the columella from the capsule. The vast literature pertaining to this latter aspect and particularly in regard to the development of the human stapes, was recently reviewed in great detail by Strickland, Hanson & Anson (1962). References to literature related to other vertebrates are found in e.g. van der Klaauw (1924), Versluys (1936), and Werner (1960). An earlier paper (Toerien, 1963) deals with the rather specialized problem of Amphibian stapes development The results of certain extirpation procsduivS on early embryos of the turtle {Chelydra serpentina) throw interesting high on the columella-capsule interrelationship.

scholarly journals The Impact of Transcription Factor Prospero Homeobox 1 on the Regulation of Thyroid Cancer Malignancy

2020 ◽  
Vol 21 (9) ◽  
pp. 3220 ◽  
Author(s):  
Magdalena Rudzińska ◽  
Barbara Czarnocka
Keyword(s):  
Transcription Factor ◽  
Thyroid Cancer ◽  
Protein Structures ◽  
Prognostic Significance ◽  
Experimental Studies ◽  
Cancer Development ◽  
Dependent Manner ◽  
Prox1 Expression ◽  
Different Origins ◽  
The Impact

Transcription factor Prospero homeobox 1 (PROX1) is continuously expressed in the lymphatic endothelial cells, playing an essential role in their differentiation. Many reports have shown that PROX1 is implicated in cancer development and acts as an oncoprotein or suppressor in a tissue-dependent manner. Additionally, the PROX1 expression in many types of tumors has prognostic significance and is associated with patient outcomes. In our previous experimental studies, we showed that PROX1 is present in the thyroid cancer (THC) cells of different origins and has a high impact on follicular thyroid cancer (FTC) phenotypes, regulating migration, invasion, focal adhesion, cytoskeleton reorganization, and angiogenesis. Herein, we discuss the PROX1 transcript and protein structures, the expression pattern of PROX1 in THC specimens, and its epigenetic regulation. Next, we emphasize the biological processes and genes regulated by PROX1 in CGTH-W-1 cells, derived from squamous cell carcinoma of the thyroid gland. Finally, we discuss the interaction of PROX1 with other lymphatic factors. In our review, we aimed to highlight the importance of vascular molecules in cancer development and provide an update on the functionality of PROX1 in THC biology regulation.

scholarly journals Stem cells transplantation in the treatment of patients with cerebral palsy

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Petriv T. ◽  
◽  
Tatarchuk M. ◽  
Tsymbaliuk Y. ◽  
Tsymbaliuk V. ◽  
...  
Keyword(s):  
Stem Cells ◽  
Cerebral Palsy ◽  
Experimental Studies ◽  
Current State ◽  
Cell Technologies ◽  
Degree Of Disability ◽  
Stem Cells Transplantation ◽  
Different Origins ◽  
High Degree

Cerebral palsy remains a significant problem today, despite scientific and technological progress. The high degree of disability and unsatisfactory quality of life of patients in this category, necessitates the search for and implementation of the latest treatments, one of which is cell transplantation. The use of regenerative cell technologies in the treatment of patients with cerebral palsy is extremely promising. Numerous experimental studies have significantly expanded the understanding of the mechanisms of the effect of the use of stem cells in cerebral palsy. Clinical applications of stem cells of different origins are safe, which is one of the prerequisites for continuing research in this area. This review is devoted to the use of regenerative cell technologies in the treatment of cerebral palsy, the current state and prospects of the approach to the treatment of cerebral palsy with stem cells.

Anisotropy of damage productions in electron irradiated molybdenum

1978 ◽  
Vol 36 (1) ◽  
pp. 354-355
Author(s):  
K. Izui ◽  
S. Furuno ◽  
H. Otsu ◽  
T. Nishida ◽  
H. Maeta
Keyword(s):  
Electron Flux ◽  
Threshold Energy ◽  
High Energy ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
Displacement Threshold ◽  
The Mean ◽  
Channeling Effect ◽  
Different Origins ◽  
Threshold Energies

Anisotropy of damage productions in crystals due to high energy electron bombardment are caused from two different origins. One is an anisotropic displacement threshold energy, and the other is an anisotropic distribution of electron flux near the atomic rows in crystals due to the electron channeling effect. By the n-beam dynamical calculations for germanium and molybdenum we have shown that electron flux at the atomic positions are from ∽4 to ∽7 times larger than the mean incident flux for the principal zone axis directions of incident 1 MeV electron beams, and concluded that such a locally increased electron flux results in an enhanced damage production. The present paper reports the experimental evidence for the enhanced damage production due to the locally increased electron flux and also the results of measurements of the displacement threshold energies for the <100>,<110> and <111> directions in molybdenum crystals by using a high voltage electron microscope.

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

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