scholarly journals Morphological studies on the seasonal changes in the epididymal duct of the one-humped camel (camelus dromedarius)

2012 ◽  
Vol 2 (1) ◽  
pp. 3 ◽  
Author(s):  
Ahmed El-Zuhry Zayed ◽  
Khaled Hamdy Aly ◽  
Ismael Abdel-Aziz Ibrahim ◽  
Fatma Mohammed Abd El-maksoud
Keyword(s):  
Morphological Changes ◽  
Reproductive Activity ◽  
Terminal Segment ◽  
Elastic Fibers ◽  
Muscular Coat ◽  
Morphological Studies ◽  
Different Seasons ◽  
Electron Microscopical ◽  
The One ◽  
Epididymal Duct

The present work was carried out on 20 testes and epididymis of sexually mature camels to elucidate the gross anatomical, morphometerical, light microscopical and scanning electron microscopical features of the epididymis in different seasons. Anatomically, the epididymal duct of a camel consists of three parts head, body and tail. Histomorphologically, the epididymal duct is subdivided into initial, middle and terminal segments, of which the middle segment is further subdivided into proximal, intermediate and distal parts. There is a gradual decrease in the epithelial height of the epididymal duct from the initial to the terminal segments. This mechanically facilities passage of the sperms toward the terminal segment. High epithelium in the initial segment may indicate a more absorptive power of the epithelium in this segment. The seasonal reproductivety of the epididymal duct in the camel expressed by variations in the weight and volume of the epididymis, total diameter of the epididymal duct, epithelial height, length of the stereocilia, thickness of the muscular coat and cellular distributions in different segments. The spring months offer ideal circumstances for maximal reproductive activity in this species. The cellular components of the epididymal duct epithelium of the camel displays important morphological changes from season to another showing signs of increasing activity during spring in comparison to decreasing activity in other seasons. PAS positive granules are demonstrated in different segments of the epididymal duct and intraepithelial glands in different seasons. These granules are relatively more numerous in spring. The lamina propria surrounding the epididymal duct contains a layer of the elastic fibers which is very thick in winter, thick in spring and thin in other seasons. This increase in thickness of the elastic fibers predisposes for the increase in the total diameter of the epididymal duct in spring. It was conclude that the muscular coat of the middle and terminal segments is the thickest in spring that may be helpful for powerful ejaculation.

scholarly journals Morphological Studies on the Epididymal Duct of the One-Humped Camel (Camelus Dromedaries)

2012 ◽  
Vol 02 (04) ◽  
pp. 245-254
Author(s):  
Ahmed E. Zayed ◽  
Khaled Aly ◽  
Ismail A. Ibrahim ◽  
Fatma M. Abd El-Maksoud
Keyword(s):  
Morphological Studies ◽  
The One ◽  
Epididymal Duct

Static and Dynamic Studies of Gasoline in View of its Octane Number and its Toxic Effect

2013 ◽  
Vol 12 (7) ◽  
pp. 451-459
Author(s):  
Ashraf Yehia El-Naggar ◽  
Mohamed A. Ebiad
Keyword(s):  
Toxic Effect ◽  
Aromatic Hydrocarbons ◽  
Octane Number ◽  
Liquid Fuel ◽  
Positive Impact ◽  
Hydrocarbon Composition ◽  
Different Temperatures ◽  
Different Seasons ◽  
The One ◽  
The Impact

Gasoline come primarily from petroleum cuts, it is the preferred liquid fuel in our lives. Two gasoline samples of octane numbers 91 and 95 from Saudi Arabia petrol stations were studied. This study was achieved at three different temperatures 20oC, 30oC and 50oC representing the change in temperatures of the different seasons of the year. Both the evaporated gases of light aromatic hydrocarbons (BTEX) of gasoline samples inside the tank were subjected to analyze qualitatively and quantitatively via capillary gas chromatography. The detailed hydrocarbon composition and the octane number of the studied gasoline samples were determined using detailed hydrocarbon analyzer. The idea of research is indicating the impact of light aromatic compounds in gasoline on the toxic effect of human and environment on the one hand, and on octane number of gasoline on the other hand. Although the value of octane number will be reduced but this will have a positive impact on the environment as a way to produce clean fuel.

PROTECTIVE EFFECT OF SOME SALTS 2-AMINOETHANESULFONIC ACID IN AN EXPERIMENTAL MODEL OF DEGENERATIVE SPINAL CORD INJURY

2020 ◽  
pp. 41-47
Author(s):  
Semeleva E.V. ◽  
Blinova E.V. ◽  
Zaborovsky A.V. ◽  
Vasilkina O.V. ◽  
Shukurov A.S.
Keyword(s):  
Spinal Cord ◽  
Morphological Changes ◽  
Male Rats ◽  
Zinc Salt ◽  
Control Group ◽  
Morphological Studies ◽  
Cord Injury ◽  
The Central Nervous System ◽  
Acid Compound ◽  
Lateral Sclerosis

In this work, we studied the pharmacological activity of zinc and magnesium salts of 2-aminoethanesulfonic acid in white non-linear male rats with amyotrophic lateral sclerosis, which was modeled by neurotoxicantsimplication into the pelvic part of spinal cord. After the reproduction of the pathology in animals, the indices of motor activity were recorded in the Rotarod test, and morphological studies of spinal cord sections stained according to Nisl in the Belshovsky modification were carried out. It was shown that the magnesium salt of 2-aminoethanesulfonic acid (compound LHT-317) to a greater extent reduces the development of motor disorders in experimental animals compared with the control group on the 4th day of observation. The course of intravenous administration of the studied compounds of 2-aminoethanesulfonic acid did not inhibit morphological changes in the spinal cord that develop in degenerative-dystrophic pathology of the central nervous system: connections. Moreover, if, against the background of treatment with zinc salt, the total area of motor zones in animals of the experimental group exceeded that of control rats, then the number of motoneurons did not differ from the control.

Acid Volatile Sulfide (AVS) and Simultaneously Extracted Metals (SEM) in Surface Sediments of Chaohu Lake, Anhui Province, China

2013 ◽  
Vol 779-780 ◽  
pp. 1213-1219
Author(s):  
Shu Qin Chen ◽  
Lei Zhang ◽  
Zhao Sheng Chu ◽  
She Rong Hu
Keyword(s):  
Surface Sediments ◽  
Local Scale ◽  
Acid Volatile Sulfide ◽  
Anthropogenic Factors ◽  
Chaohu Lake ◽  
Lake Surface ◽  
Different Seasons ◽  
The One ◽  
Short Time ◽  
Spot 5

At present there are few studies on the AVS and SEM in sediments of Chaohu Lake. Most of the previous studies on heavy metals based on the one time, the short-time or a local-scale survey. In this paper, [AVS] and [SEM] in Chaohu Lake surface sediments were studied for different seasons in 2007, 2008 and 2009. The results showed that: (a) The three-year average of [AV and [ΣSE in surface sediments of Chaohu Lake is 4.2μmolg-1and 2.31μmolg-1, respectively. The maximum of [AV appears on spot 5 (14.845μmolg-1) in summer while the minimum appears on spot 9 (0.13μmolg-1) in winter. (b) In spot 5 which near the estuary of Yuxi River, three-year average of [SE was the maximum (5.81μmolg-1), and the minimum of [ΣSE (0.07μmolg-1) appears on spot 8 which locates in the middle of Chaohu Lake. In spot 13 the [ΣSEM]-[AVS]=3.2>2 and [ΣSEM]/[AVS]=4.45>2.34 indicate that heavy metal contaminants from Hefei city have threatened the biosafety of Chaohu Lake. (c) The spatial autocorrelation of SEMCdis weak, which indicates that spatial distribution of SEMCdis determined by anthropogenic factors rather than sediments' own attribute. Chaohu Lake has been heavily polluted by Cd from no-point source and electronic electroplating industry.

Electron Microscopical and Immunohistochemical Studies on the Induction of "Qi" Employing Needling Manipulation

1992 ◽  
Vol 20 (01) ◽  
pp. 25-35 ◽  
Author(s):  
Michio Kimura ◽  
Kazuo Tohya ◽  
Kyo-ichi Kuroiwa ◽  
Hirohisa Oda ◽  
E. Christo Gorawski ◽  
...  
Keyword(s):  
Mast Cells ◽  
Nerve Fiber ◽  
Functional Relationship ◽  
Nerve Fibers ◽  
Elastic Fibers ◽  
Electron Microscopical Analysis ◽  
Calcitonin Gene ◽  
Transparent Materials ◽  
Electron Microscopical ◽  
Immunohistochemical Studies

During a sparrow-pecking and twisting-needle manipulation to the acupoints BL 23, 24 and 25 for an induction of "Qi", it was found that some transparent materials were binding to the needles after removed from the volunteer's skin. Electron-microscopical analysis of the transparent materials revealed that they corresponded to the injured fascia made up of collagen fibers, elastic fibers, fibroblasts, adipocytes and mast cells. Rarely were nerve fiber-like structures observed in the materials. Immunohistochemically, calcitonin gene-related peptide-positive nerve fibers could be demonstrated in the acupoint BL 24 associated fascia. A possible functional relationship between the needle manipulation and the induction of Qi-sensation is discussed along with the acupoint tissue constitution.

scholarly journals The effects of supraphysiological supplementation of b-carotene in spontaneously hypertensive rats (SHR and SHR-sp)

2014 ◽  
Vol 41 (5) ◽  
pp. 351-355 ◽  
Author(s):  
Stênio Karlos Alvim Fiorelli ◽  
Lúcia Marques Vianna ◽  
Carlos Alberto Basílio de Oliveira ◽  
Rossano Kepler Alvim Fiorelli ◽  
Bernardo Cunha Senra Barros ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Spontaneously Hypertensive Rats ◽  
Carotid Arteries ◽  
Morphological Changes ◽  
Serum Levels ◽  
Muscle Layer ◽  
Male Rats ◽  
Elastic Fibers ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive

Objective: to investigate the effect of administration of supraphysiological âcaroteno on biological parameters (ectoscopy and blood pressure), laboratory (malondialdehyde) and histological (liver and carotid arteries) of spontaneously hypertensive rats prone to stroke (SHR-sp).Methods: we used 36 male rats were divided into three groups, each containing 12 rats Wistar, SHR and SHR-sp, subdivided into six control animals and six animals treated with supraphysiological doses of âcaroteno for two periods of ten weeks interspersed with one week interruption. In the experiment were assessed daily physical examination and blood pressure (plethysmography). At sacrifice, blood was collected for measurement of serum malondialdehyde, liver and carotid arteries for histological examination.Results: temporary change in color of the fur, decreased significantly (p<0.0001) blood pressure (20mg supplementation âcaroteno) and serum levels of malondialdehyde (p<0.05) and increased amount of elastic fibers in the carotid wall of SHR and SHR-sp.Conclusion: supplementation of supraphysiological âcaroteno caused no toxic effects, showed positive response in the modulation of blood pressure and lower serum malondialdehyde. No significant morphological changes were found in both groups, except an increase in the number of elastic fibers in the muscle layer carotid suggesting elastosis in SHR and SHR-sp.

scholarly journals Morphological changes in parenchymal organs of laboratory animals in acute effect of carbon tetrachloride

2020 ◽  
Vol 99 (9) ◽  
pp. 1001-1006
Author(s):  
Elvira F. Repina ◽  
Denis O. Karimov ◽  
Samat S. Baygildin ◽  
Gulnara V. Timasheva ◽  
Nadezhda Yu. Khusnutdinova ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Carbon Tetrachloride ◽  
Protective Effect ◽  
Morphological Changes ◽  
Acute Exposure ◽  
Laboratory Animals ◽  
Antihypoxic Activity ◽  
Prophylactic Administration ◽  
Morphological Studies ◽  
High Doses

Introduction. Among noninfectious diseases, one of the leading places belongs to pathologies caused by the action of industrial toxicants. In this regard, the search for drugs for the prevention and treatment of various intoxications is one of the priority tasks of public health. Treatment of intoxication with drugs with antioxidant and antihypoxic activity is more effective. The aim of this study was to investigate morphological changes in parenchymal organs (liver, kidneys, and pancreas) under acute exposure to high doses of carbon tetrachloride and to evaluate the effectiveness of their correction with a new composition of oxymethyluracil with ascorbic acid. Material and methods. The composition of 5-hydroxy-6-methyluracil with ascorbic acid was first synthesized at the Ufa Institute of Chemistry, Ufa Federal Research Center, RAS. The preventive effect of the new drug was studied in comparison with “Heptor” on the carbon tetrachloride-induced liver injury model. Morphological studies of the liver, pancreas, and kidneys of laboratory animals were carried out. Results. Studies have shown the prophylactic administration of new composition of 5-hydroxy-6-methyluracil with ascorbic acid to have a protective effect on the structure of parenchymal organs in acute carbon tetrachloride intoxication, comparable to the drug “Heptor” (possibly superior). However, reparative properties were observed only in the drug “Heptor”. Conclusion. Comparative estimation of morphological changes in parenchymal organs under acute exposure to high doses of carbon tetrachloride indicates the protective effect of prophylactic administration of the composition of 5-hydroxy-6-methyluracil with ascorbic acid, comparable to the drug “Heptor” (possibly superior).

scholarly journals The effect of four commercial broiler hybrids and the season on occurrence of broiler condemnations in the abattoirs

2020 ◽  
Vol 50 (10) ◽  
Author(s):  
Antonise Mariely Jaguezeski ◽  
Ana Martiele Engelmann ◽  
Ivna Nalério dos Reis Machado ◽  
Beatriz Pavei Bez Batti
Keyword(s):  
Financial Impact ◽  
Welfare Programs ◽  
Conviction Rate ◽  
Commercial Broiler ◽  
Different Seasons ◽  
Time Of Year ◽  
One Year ◽  
The One ◽  
Inspection Service ◽  
Abattoir Data

ABSTRACT: Condemnations in the broilers abattoirs can represent an overview farms health and effectiveness of welfare programs, as well as predisposition between hybrids. The aim of this study was to investigate the prevalence of condemnation among four commercial broiler hybrids and the oscillation of condemnations in different seasons in a poultry abattoir. Data from condemnations of the Federal Inspection Service of a slaughterhouse were analyzed during one year, in which a total of 12.81% of partial condemnations were observed and total condemnations represented 0.41% of slaughtered broiler. There was a difference in total and partial condemnation among the hybrids evaluated, with Hubbard hybrid being the one with the highest number of condemnations (0.67% - 17.71%), followed by Ross 95 (0.42% - 14.21%), Cobb (0.30% - 10.03%); and Cobb Fast (0.26% - 9.29%). The analysis between the seasons showed a higher conviction rate in winter and a lower rate in autumn for both total and partial condemnation. Hubbard had the highest rates and Cobb Fast the lowest for most causes of condemnation. We concluded that the metabolic cause led to higher losses by total condemnation, while contamination or technopathies represented the highest rates in partial losses. The broiler hybrid and the time of year may influence the causes of condemnation in the abattoir. This information should be considered by the abattoir and the farms in sanitary planning, considering the financial impact due to losses by condemnations of carcasses.

scholarly journals Effects of Environmental Variables on some Physiological Responses of Microtus montanus Under Natural Conditions

1982 ◽  
Vol 6 ◽  
pp. 66-68
Author(s):  
Aelita Pinter
Keyword(s):  
Environmental Variables ◽  
National Park ◽  
Reproductive Activity ◽  
Natural Conditions ◽  
Term Study ◽  
Microtus Montanus ◽  
Long Term Study ◽  
Microtine Rodents ◽  
Different Seasons

Cyclic fluctations in the popu]ation density of rnicrotine rodents have been known since antiquity. However, factors responsible for this phenomenon are not known. The objectives of this long term study are essentially threefold: 1. characterize those environmental variables that might affect Microtus montanus in different seasons of the year; 2. record the growth, maturation and reproductive activity of the voles under natural conditions; and 3. determine the maturational, as well as, the seasonal pelage changes of these rodents. The data resulting from the execution of the above objectives would be correlated in an attempt to determine the causes undedying the multiannual fluctuations in the population density of these microtine rodents in Grand Teton National Park.

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