scholarly journals S. Ramon Cajal. Nouvelles contributions à l’étude histologique de la rétine. Journal de l’Anatomie et de la Physiologie. XXXII année, 1896, № 5. Septembre—octobre. P. p. 481—543

2020 ◽  
Vol VI (1) ◽  
pp. 191-200
Author(s):  
A. E. Smirnov
Keyword(s):  
The Body ◽  
Embryonic Period ◽  
Visual Cells ◽  
Rods And Cones ◽  
In The Beginning ◽  
Second Period

In the development of rods and cones, the author notes 4 common and other main periods: the embryonic period, the period of unipolarity, the period of bipolarity and the period of the young state. The first period corresponds to the period of the germinal bodies of His and, to some extent, the period of mitosis, described, for example, by Koganeem and Shevich. The shape of the visual cells at this time is irregular, spherical. In newborn cats, rabbits and dogs, all these cells, apparently, have already passed this period, at least it is impossible to see mitosis at this time. In the second period, located in the beginning along the neighborhood with m. limit. externa, the cell stretches out and gives a long outgrowth, the end of which is the cell itself, gradually descending downward to the point at which it should be in adulthood. The body is ellipsoidal with a vertically standing long axis; but sometimes this form is changed through compression by the neighboring elements.

scholarly journals Squalene: a multi-task link in the crossroads of cancer and aging

2013 ◽  
Vol 3 (12) ◽  
pp. 462 ◽  
Author(s):  
Alvaro L. Ronco ◽  
Eduardo De Stéfani
Keyword(s):  
Olive Oil ◽  
Animal Species ◽  
Virgin Olive Oil ◽  
Extra Virgin Olive Oil ◽  
The Body ◽  
Intermediate Step ◽  
Key Words Aging ◽  
Body Structure ◽  
Anticancer Properties ◽  
In The Beginning

Since its discovery in the beginning of the XXth century, squalene has been recognized as an important link in metabolic pathways. More recently, it has been further recognized as an intermediate step in the biosynthesis of cholesterol. Its well known antioxidant capability, together with its ability to protect skin, improve the immune system, and modulate the lipid profile, confer a high potential to this natural substance, which is spread all across the body structure, though mainly in the epithelial tissues, and in particular the skin sebum. This review will focus mainly on its major properties, which are related to anticancer properties, the maintenance of the oxidation/antioxidation balance, and its antiaging capabilities. Although the substance was originally obtained from shark liver oil, it is currently possible to obtain useful amounts from vegetable sources like extra virgin olive oil, therefore avoiding the dependence on capturing the aforementioned animal species. Recognized as one of the key components of the Mediterranean dietary style, squalene is necessary to adequately manage oxygen and its derivatives in every cell of the body. Key words: aging, antioxidants, cancer, cholesterol, diet, olive oil, squalene

COVID-19 and Alcohol Misuse: A Case Report

2021 ◽  
Vol 21 ◽  
Author(s):  
Ali Asadollahi-Amin ◽  
Ali Nowroozi ◽  
Mehrdad Hasibi ◽  
Behzad Asanjarani ◽  
SeyedAhmad SeyedAlinaghi
Keyword(s):  
Social Media ◽  
Case Report ◽  
Immune System ◽  
Alcohol Consumption ◽  
Alcohol Drinking ◽  
Alcohol Misuse ◽  
The Body ◽  
False Information ◽  
In The Beginning

Abstract: In the beginning of 2020, a newly emerged virus, now named SARS-CoV-2, began to spread in China. After four months, it has reached all over the globe, infecting more than 2.5 million people. Currently, there are no proved treatments available. However, in social media, false information about alcohol consumption and its role against the virus is spreading. We described a victim of these false facts who presented with reduced eyesight due to alcohol drinking, a few days later showed symptoms of COVID-19 and, even though treated, lost his eyesight partially. Alcohol taking has no preventive or curing effect on COVID-19 and negatively impacts the body and immune system, which, therefore, should not be considered a treatment for COVID-19 disease.

scholarly journals Characterization of the imaginal reproductive diapause of Oebalus poecilus (Dallas) (Hemiptera: Pentatomidae)

2003 ◽  
Vol 63 (4) ◽  
pp. 695-703 ◽  
Author(s):  
R. S. S. Santos ◽  
L. R. Redaelli ◽  
L. M. G. Diefenbach ◽  
H. P. Romanowski ◽  
H. F. Prando
Keyword(s):  
Body Fat ◽  
Sexual Maturation ◽  
Abdominal Cavity ◽  
Reproductive Organs ◽  
Reproductive Organ ◽  
The Body ◽  
Reproductive Diapause ◽  
Male And Female ◽  
In The Beginning

The state of development of the internal reproductive organs of male and female Oebalus poecilus (Dallas) as well as the body fat amount in the abdominal cavity during hibernation, of individuals sampled in bamboo litter in Eldorado do Sul (30º02'S and 51°23'W), RS, Brazil was investigated. Females and males showed the abdominal cavity filled with body fat in the beginning of the hibernation phase. The decrease in fat reserve level occurred from August on for males and from October on for females. Ovaries and testis doubled in length and tripled in width from immature to the reproductive phase. Male sexual maturation occurred in the hibernation sites while for females it occurred later on outside of the sites. Reproductive organ immaturity and abdominal body fat hypertrophy characterized the diapause of O. poecilus.

scholarly journals THE RENEWAL OF ROD AND CONE OUTER SEGMENTS IN THE RHESUS MONKEY

1971 ◽  
Vol 49 (2) ◽  
pp. 303-318 ◽  
Author(s):  
Richard W. Young
Keyword(s):  
Rhesus Monkey ◽  
Rhesus Monkeys ◽  
Outer Segment ◽  
Pigment Epithelium ◽  
Renewal Processes ◽  
Visual Cells ◽  
Rods And Cones ◽  
Outer Segments ◽  
Retinal Rod ◽  
Assembly Site

The renewal of retinal rod and cone outer segments has been studied by radioautography in rhesus monkeys examined 2 and 4 days after injection of leucine-3H. The cell outer segment consists of a stack of photosensitive, membranous discs. In both rods and cones some of the newly formed (radioactive) protein became distributed throughout the outer segment. Furthermore, in rods (but not in cones), there was a transverse band of concentrated radioactive protein slightly above the outer segment base 2 days after injection. This was due to the formation of new discs, into which labeled protein had been incorporated. At 4 days, these radioactive discs were located farther from the outer segment base. Repeated assembly of new discs had displaced them away from the basal assembly site and along the outer segment. Measurements of the displacement rate indicated that each retinal rod produces 80–90 discs per day, and that the entire complement of outer segment discs is replaced every 9–13 days. To compensate for the continual formation of new discs, groups of old discs are intermittently shed from the apical end of the cell and phagocytized by the pigment epithelium. Each pigment epithelial cell engulfs and destroys about 2000–4000 rod outer segment discs daily. The similarity between visual cells in the rhesus monkey and those in man suggests that the same renewal processes occur in the human retina.

Pritchett Controls: ten years into employee ownership

2018 ◽  
Vol 14 (3) ◽  
pp. 305-322
Author(s):  
Richard C. Hoffman ◽  
Wayne H. Decker ◽  
Frank Shipper
Keyword(s):  
Human Resources ◽  
Organizational Development ◽  
High Performance ◽  
Secondary Data ◽  
Employee Ownership ◽  
Strategic Human Resource Management ◽  
The Body ◽  
Primary Data ◽  
Content Type ◽  
In The Beginning

Synopsis This case illustrates the rationale for adopting employee ownership, and difficulties in implementing employee empowerment beyond investment. In the beginning it focuses on why Jerry Pritchett, one of the co-founders of Pritchett Controls, decided to convert it to an employee-owned company. In the body of the case, it details the efforts of the company to operate under its new ownership structure in an increasingly competitive environment. Although Pritchett established employee owners, only selected High Performance Work Systems (HPWS) practices have been implemented. The issue that reader must grapple with is whether other HPWS practices should be adopted or not. Research methodology Primary data were collected by interviewing eight managers including the current and former CEO at two of the firm’s three locations. Secondary data were used to supplement industry and competitive information. Relevant courses and levels Human resources courses, especially those that focus on strategic human resource management, organizational development, and how high performance organizations can be built, would be most appropriate for this case. Theoretical bases The primary theoretical foundations for this submission are shared entrepreneurship and HPWS. Knowledge of leadership, employee ownership, human resources, corporate governance, organizational culture and strategy would also be helpful in analyzing this case.

Relationship between visual and tactile representations in cat superior colliculus

1976 ◽  
Vol 39 (2) ◽  
pp. 401-419 ◽  
Author(s):  
B. E. Stein ◽  
B. Magalhaes-Castro ◽  
L. Kruger
Keyword(s):  
Distribution System ◽  
Visual Fields ◽  
Detailed Examination ◽  
Acute Angle ◽  
The Body ◽  
Behavioral Deficits ◽  
Visual Cells ◽  
The Face ◽  
Area Centralis ◽  
Cat Superior Colliculus

A stratified organization of visual, somatic and acoustic representations was observed in the cat SC. Cells of the superficial laminae were exclusively visual. Visual, somatic, and acoustic cells were observed in the intermediate laminae while the deeper laminae were predominantly nonvisual. A detailed examination of the tactile representation revealed a somatotopic plan which was in register with the overlying visuotopy. The magnified representation of central visual fields overlapped the magnified tactile representation of the face and, as visual RFS moved temporally, the underlying tactile RFS were displaced caudal and distal. This topographical overlap can be recognized if the visual field is depicted as a flexible sheet which is stretched over the body with the area centralis superimposed on the nose and the limbs radiating out at an acute angle. The overlapping topographies and similarities in stimulus specificity of somatic and visual cells, as well as the similar behavioral deficits previously described following SC lesions, suggests a functional parallel between modalities in the SC. The possibility that visual, somatic, and acoustic cells converge on a common delivery or distribution system, which is located in the intermediate-deeper SC strata and organizes orienting and following responses on the basis of multimodality cues, is discussed.

scholarly journals Ophthalmology: ozone therapy applied to dystrophic maculopathy

Ozone Therapy ◽  
2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Giorgio Grechi
Keyword(s):  
The Body ◽  
Age Related Macular Degeneration ◽  
Antioxidant Systems ◽  
Macular Area ◽  
Ozone Therapy ◽  
Rods And Cones ◽  
Age Related ◽  
Small Structure ◽  
Colloid Cysts ◽  
The Brain

The macula, which is the noblest part of the retina, is a very small structure, containing the photoreceptors (rods and cones) responsible for visual acuity. Over the years, observations have confirmed that alterations that modify the optimal state of the eye also give rise to similar diseases in the brain: ischemias, structural circulatory alterations and neurodegeneration. As the body ages, oxidative alterations take place and they change the antioxidant systems that serves as a neurological and ocular defence. In industrialised nations, age-related macular degeneration is the leading cause of blindness in patients over 55 years of age. Initially, this creates drusen (or colloid cysts) in the macular area.

Microspectrophotometry of visual pigments

1972 ◽  
Vol 5 (3) ◽  
pp. 349-393 ◽  
Author(s):  
Stanley D. Carlson
Keyword(s):  
Vitamin A ◽  
Conformational Change ◽  
Visual Pigments ◽  
Visual Cells ◽  
Rods And Cones ◽  
Outer Segments ◽  
Pigment Molecule ◽  
Receptor Membrane ◽  
Covalently Bonded ◽  
Membrane Changes

Visual pigments are embedded in the disc membranes of the outer segments of vertebrate rods and cones and in the microvilli of invertebrate visual cells. The pigment molecule in both is a most fascinating aggregate of known (the ubiquitous II-cis isomer of vitamin A1 or A2-aldehyde = retinal1 or 2; Hubbard & Wald, 1952) covalently bonded to the unknown (a protein termed opsin) (Anderson, Hoffman & Hall, 1971). This conjugated molecule is called rhodopsin or dehydrorhodopsin (porphryopsin) when the prosthetic portion is retinall or 2 respectively. So sensitive is this sterically hindered, bent and twisted molecule to light that absorption of one photon can initiate its isomerization to the all trans form. This conformational change is but one (but the best known) of the factors leading to receptor membrane changes ushering in the visual impulse.

Artistic Influences Analysis of Iraqi National Costumes

2013 ◽  
Vol 821-822 ◽  
pp. 735-745
Author(s):  
Alttabi Furat Jamal Hassan ◽  
Xiang Yang Bian ◽  
Xiao Yu Xin
Keyword(s):  
The Body ◽  
Northern Iraq ◽  
The North ◽  
Wool Material ◽  
History Of ◽  
The Right ◽  
In The Beginning ◽  
Head Cover ◽  
The Impact ◽  
Southern Iraq

There were signs of the first civilization known to humanity for more than 6000 years BC in the north of Iraq have disappeared this civilization to appear after 500 years in southern Iraq, the Sumerian civilization, which was considered as the opinion of scientists or civilizations, exceeds the impact to Asia and the countries that had been in contact (Sumerians) and see them today in other towns and villages. In subsequent periods of time appeared distinct personalities to their nature, religious, social, special clothing with clothes seem especially long. And usually dress is made from raw wool material making them in the Sumerian era. Put the garment on the body and leaves the top of the right shoulder with the survival of an open hand. There are of special clothing used by the clergy in the exercise of religious mourning rituals .There are traditional clothes to the clergy of other faiths. The clothing we see in the beginning of the third millennium BC has gained status in society in general, and was also the head cover. The animals have for centuries symbolized the signs of a divinity that we see hanging on the walls of some temples in northern Iraq. Centuries have been mentioned in the history of the Arabian were animal horns in Sumerian times to symbolize the moon in the Sumerian language .

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