scholarly journals Age related changes in testicular histomorphometry and spermatogenic activity of bulls

2021 ◽  
Vol 72 (3) ◽  
pp. 3139
Author(s):  
Y BELKHIRI ◽  
S BENBIA ◽  
A DJAOUT
Keyword(s):  
Sexual Development ◽  
Production Capacity ◽  
Sperm Production ◽  
Reproductive State ◽  
Cell Numbers ◽  
Cell Efficiency ◽  
Age Related ◽  
The Mean ◽  
Tubular Diameter ◽  
Age Related Changes

The aim of the present study was to evaluate age related changes in testicular histomorphometry and spermatogenic activity of bulls during their sexual development. A total of 36 bulls were selected and divided into four groups (n=9 in each) according to their age. Bulls included in Groups I, II, III and IV were 10, 12, 14 and 16 months old respectively. Left testes of bulls were subjected to histomorphometry after slaughter. Statistical analysis revealed that the secondary spermatocytes, round and elongated spermatids increased significantly (P˂0.05) with the age of bulls. Likewise, both sertoli and leydig cell numbers increased significantly (P˂0.05) with the age of bulls. However, the number of spermatogonia and primary spermatocytes did not change (P>0.05) due to age. The mean tubular diameter increased from 200.70±5.45 μm (10 months of age) to 227.30±9.16 μm (16 months of age) and the total volume of seminiferous tubule per testis from 69.63±1.50 % (10 months of age) to 84.64±2.53 % (16 months of age). A positive linear relationship (P<0.05) was found between meiotic index (Y) and the age (X, in month), which was characterized by the equation 0.048X+3.135 and a coefficient of correlation (R) of 0.396. The correlation between age and sertoli cell efficiency was 0.482 with a regression equation Y= 0.141X+7.696. It is concluded that histomorphometric parameters of the bulls’ testes and spermatogenic activity are correlated with the age, so these parameters provide a reliable tool for the assessment of the reproductive state and sperm production capacity of a bull in a breeding program.

scholarly journals Morphometric study of the size of the postmortem human kidney

2020 ◽  
Vol 15 (2) ◽  
pp. 61-67
Author(s):  
Fatema Johora ◽  
Abu Sadat Mohammad Nurunnabi ◽  
Dilruba Siddiqua ◽  
Hasna Hena ◽  
Shamim Ara
Keyword(s):  
Young Adult ◽  
Left Kidney ◽  
Age Groups ◽  
Morphometric Study ◽  
Age Related ◽  
Study Results ◽  
Group A ◽  
The Mean ◽  
The Right ◽  
Age Related Changes

Background: Changes in the size of the kidney are evident in humans, as age progresses. Objective: To see the age-related changes in the morphological dimensions of the kidney in a sample of the Bangladeshi population. Methods: This crosssectional study was done in the Department of Anatomy, Dhaka Medical College, Dhaka, from July 2008 to June 2009, based on a collection of 140 postmortem human kidneys collected from 70 unclaimed dead bodies from the morgue of the same institution. All the samples of kidney were divided into three age groups, including A (10-19 years), B (20-39 years) and C (40-59 years). The length, breadth and thickness of all the kidneys were measured by using a slide calipers and recorded. Data were expressed as mean±SD. For statistical analysis, independent sample t test and one way ANOVA was used. Results: The length of the right and left kidneys found were 8.72±0.25 cm and 9.28±0.12 cm; 9.73±0.35 cm and 10.31±0.41 cm; 9.68±0.21 cm and 10.24±0.06 cm in group A, B and C respectively. The breadth of the right and left kidneys found were 4.32±0.09 cm and 4.22±0.11 cm; 4.74±0.29 cm and 4.55±0.28 cm; 4.61±0.21 cm and 4.44±0.21 cm in group A, B and C respectively. The thickness of the right and left kidneys found were 2.84±0.10 cm and 2.64±0.05 cm; 3.31±0.16 cm and 3.11±0.10 cm; 3.17±0.07 cm and 3.11±0.10 cm in group A, B and C respectively. The mean length of the left kidneys was found significantly greater than that of the right , whereas the mean breadth and the thickness of the right kidneys were found greater than that of the left kidney in all age groups. Moreover, age related changes were significant in all dimensions (length, breadth and thickness) of the kidney when compared between group A & B and A & C. Conclusion: This study results concluded that the length of the left kidney was greater than that of the right, but the breadth and the thickness of the right kidney were greater than that of the left one in all age groups. In addition, age related changes in all dimensions (i.e. length, breadth and thickness) of the kidneys were evident in middle age versus young adult and older adult versus young adult. J Bangladesh Soc Physiol. 2020, December; 15(2): 61-67

scholarly journals Computed tomographic assessment of equine maxillary cheek teeth anatomical relationships, and paranasal sinus volumes

2017 ◽  
Vol 181 (17) ◽  
pp. 452-452 ◽  
Author(s):  
Tiziana Liuti ◽  
Richard Reardon ◽  
Paddy M Dixon
Keyword(s):  
Maxillary Sinus ◽  
Age Group ◽  
Medial Aspect ◽  
Computed Tomographic ◽  
Age Related ◽  
Infraorbital Canal ◽  
The Mean ◽  
The Individual ◽  
Gross Examination ◽  
Age Related Changes

Disorders affecting the equine maxillary cheek teeth and paranasal sinuses are relatively common, but limited objective information is available on the dimensions and relationships of these structures in horses of different ages. The aims of this study were to assess age-related changes in the positioning and anatomical relationships of the individual maxillary cheek teeth with the infraorbital canal and maxillary septum and the volumes of the individual sinus compartments. CT and gross examination were performed on 60 normal equine cadaver heads that were aged by their dentition. The intrasinus position of cheek teeth, length of reserve crowns, relationship to the infraorbital canal and measurements of rostral drift and sinus compartment volumes were assessed from CT images. The findings included that Triadan 10 alveoli lay fully or partially in the rostral maxillary sinus (RMS) in 60% of cases. The infraorbital canal lay directly on the medial aspect of the alveolar apex in younger horses. The Triadan 11’sclinical crowns and apices drifted a mean of 2.48 and 2.83 cm more rostral to the orbit, respectively, in the >15 years old vs the <6 years old age group. The mean volumes of sinus compartments ranged from 175 cm3for the caudal maxillary sinus (CMS) to 4 cm3for the ethmoidal sinus (ES). This information should be of value in the diagnosis and treatment of equine dental and sinus disorders and as reference values for further studies.

scholarly journals Anatomical changes of the development of red Sokoto goat stomach

2020 ◽  
Vol 4 (1) ◽  
pp. 004-009
Author(s):  
A Bello ◽  
OA Joseph ◽  
JE Onua ◽  
BI Onyeanusib ◽  
MA Umaru ◽  
...  
Keyword(s):  
Digestive Tract ◽  
Mean Value ◽  
Histological Techniques ◽  
Anatomical Changes ◽  
Age Related ◽  
Group A ◽  
Length Width ◽  
The Mean ◽  
Red Sokoto Goat ◽  
Age Related Changes

This study is aimed at investigating the age related changes in postnatal development of red Sokoto goat stomach. In this study, a total of ten red Sokoto goat digestive tract samples were used and they were grouped into five (5) age categories (group A to E). The goat ages were estimated using dentition eruption and wearing. The stomach was identified and separated from the other part of digestive tract. The gross study revealed that the stomach was composed of four (4) segments that named; rumen, reticulum, omasum and abomasum with anatomical demarcations between them. The biometric study of weight, length, width, thickness, and volume was found to be increasing with advancement in postnatal ages with the following valves shows the mean value of weight, length, width, thickness and volume were to be 29 to 58.0 (g), 23.5, to 52.1 (cm), 15.4 to 29.0 (cm), 0.48 to 1.0 (mm) and102 to 432 (cm3) from group A to group E respectively. Based on the above findings it was suggested that more research should be conducted using histological techniques and electron microscopy in order to finalize on the findings.

Sleep Patterns of Infants and Young Children in Israel

1995 ◽  
Vol 18 (4) ◽  
pp. 701-711 ◽  
Author(s):  
Anat Scher ◽  
Emanuel Tirosh ◽  
Michael Jaffe ◽  
Lisa Rubin ◽  
Avi Sadeh ◽  
...  
Keyword(s):  
Young Children ◽  
Sleep Patterns ◽  
Sleep Habits ◽  
Sleep Behaviour ◽  
Age Related ◽  
The Mean ◽  
Infants And Young Children ◽  
Age Related Changes

The sleep habits of 661 Israeli children between the ages of 4 months and 4 years were described by their mothers. Twenty-eight per cent reported that their children woke up at least once a week. In the group of regular wakers, the mean number of interrupted nights per week was 4.7, and the mean number of awakenings per night was 2.0. Significant age-related changes in sleep patterns were indicated. The results of this study suggest that sleep and settling patterns in different sociocultural groups are quite similar. These data indicate the existence of an inherent pattern in the maturation of sleep behaviour in the developing child.

scholarly journals Разработка ЯМР-релаксометра для определения динамики намагниченности протонов воды живых тканей и его использование для оценки возрастных изменений

2019 ◽  
Vol 89 (7) ◽  
pp. 1118
Author(s):  
Ю.И. Неронов ◽  
Д.Д. Косенков
Keyword(s):  
Connective Tissue ◽  
Spin Relaxation ◽  
Recovery Rate ◽  
Relaxation Times ◽  
Paramagnetic Centers ◽  
Metabolic Processes ◽  
Age Related ◽  
The Mean ◽  
Living Tissues ◽  
Age Related Changes

AbstractA desktop NMR relaxometer was created, which allows determining spin–spin relaxation times of water protons in living tissues. Spin relaxation times of protons of water reflect changes in the mean number of paramagnetic centers, since the presence of these centers increases the magnetization recovery rate of water protons in living tissues tens of times. In particular, this method allowed observing age-related changes (sarcopenia) related to substitution of connective tissue for muscle fibers. Relaxometers of this type are comfortable to use and are promising devices for analysis and diagnostics of changes and disorders of metabolic processes.

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