scholarly journals GROWTH OF THE CHICKEN EMBRYO AND ITS REPRODUCTIVE ORGANS

2020 ◽  
pp. 95-99
Author(s):  
Р.Ю. Хохлов ◽  
С.И. Кузнецов
Keyword(s):  
Chicken Embryo ◽  
Minimum Weight ◽  
Reproductive Organs ◽  
Relative Increase ◽  
Weight Increase ◽  
Ovarian Mass ◽  
Maximum Increase ◽  
Mass Growth ◽  
Age Range ◽  
Embryo Length

Статья посвящена анализу относительного прироста массы и длины куриного эмбриона и его репродуктивных органов. На основании полученных данных установлена асинхронность изменения изучаемых показателей. Выявлено, что прирост массы куриного эмбриона проходил с чередованием периодов увеличения и снижения темпов роста изучаемого показателя. Наиболее интенсивный прирост массы показали куриные эмбрионы в интервале эмбриогенеза 12-13 суток. Максимальный прирост массы яичника куриного эмбриона так же приходится на этот возрастной интервал. Минимальный прирост массы куриного эмбриона зафиксирован в возрастном периоде 11-12 суток и 18-19 суток. Рост длины эмбриона имеет более выровненные значения, по сравнению с ростом массы эмбриона, так как за наблюдаемый период (11-20 суток) находился в диапазоне 8-12 %, и только в интервале 19-20 суток составил лишь 3 %. Результаты исследования показали, что развитие яйцевода и яичника проходит асинхронно. Это проявляется в том, что темп прироста массы яйцевода постепенно увеличивается, а темпы прироста массы яичника, напротив, снижаются в течение эмбрионального развития. The article is devoted to the analysis of the relative increase in the mass and length of the chicken embryo and its reproductive organs. Based on the data obtained, the asynchrony of changes in the studied indicators is found. It was found that the increase in the mass of the chicken embryo took place with alternating periods of increase and decrease in the growth rate of the studied indicator. The most intensive weight increase was shown by chicken embryos in the embryogenesis interval of 12-13 days. The maximum increase in the ovarian mass of a chicken embryo also occurred in this age range. The minimum weight increase of a chicken embryo was noticed in the age period of 11-12 days and 18-19 days. The increase of the embryo length has more levelled values compared to the increase of the embryo mass, since during the observed period (11-20 days) it was in the range of 8-12 %, and only in the range of 19-20 days it was only 3 %. The results of the study showed that the developments of the oviduct and ovary are asynchronous. This is seen in the fact that the rate of oviduct mass growth gradually increases, while the rate of ovarian mass growth, on the contrary, decreases during embryonic development.

scholarly journals STATUS GIZI KURANG BERESIKO TERHADAP USIA MENARCHE PADA SISWI KELAS VI DI SDN 007 RAMBAH KABUPATEN ROKAN HULU

2021 ◽  
Vol 10 (1) ◽  
pp. 8-13
Author(s):  
Rahmi Fitria
Keyword(s):  
Nutritional Status ◽  
Reproductive Organs ◽  
Cross Sectional ◽  
A Value ◽  
Age Range ◽  
Relationship Of ◽  
The Relationship ◽  
Age Of Menarche ◽  
Regression Tests ◽  
Menarche Age

Menarche is a sign of the proper functioning of a woman's reproductive organs when having her first menstruation and is common in the age range of 10-16 years. Menarche is influenced by several factors, one of which is nutritional status. According to Noviyanti research (2016) nutrition affects a girl's sexual maturity so that it affects the slowness of menarche. Similarly, research conducted by Munda (2016) that students with overweight nutritional status faster experienced menarche compared to students who have normal nutritional status and underweight. This study aims to find out the relationship of nutritional status to the age of menarche grade VII students in Pesantren Bahrul Ulum. This research method uses descriptive method with cross sectional research design. This research was conducted in SDN 007 Rambah. The sample of this study amounted to 45 respondents. Data collection uses simple correlation and linear regression tests. The results of this study stated that the average nutritional status of grade VII students is 21.60Kg /m2, and the nutritional status of students is at least 16.90 Kg / m2 and the highest nutritional status is 27.60 Kg / m2 with an average age of menarche 12.11 years. The conclusion of this study is that there is no relationship of nutritional status with menarche age in grade VII students in Pesantren Bahrul Ulum with a value of p= 0.036.

Fracture Mechanics Integrity Assessment of Stud Bolts Subjected to Cathodic Protection

2020 ◽  
Author(s):  
Mario A. L. de Castro ◽  
Fabio Alves ◽  
Kumarswamy Karpanan ◽  
Anand Venkatesh
Keyword(s):  
Fracture Mechanics ◽  
Cathodic Protection ◽  
Atomic Hydrogen ◽  
Sea Water ◽  
Circular Crack ◽  
Relative Increase ◽  
Maximum Increase ◽  
Integrity Assessment ◽  
Thread Root ◽  
Metallic Parts

Abstract Exposure of metallic parts to cathodic protection (CP) in sea water leads to production and diffusion of atomic Hydrogen into the metal matrix. Absorption of atomic Hydrogen into the metal could lead to hydrogen embrittlement (HE). In order to study the influence of stresses related to HE, FEA and Fracture Mechanics (FM) assessments were performed on a stud bolt threaded geometry. Effects of manufacturing tolerances, interface between nut and stud bolt and a defect in the form of a semi-circular crack placed in highest stress location of a thread root were also considered. Investigations of stress profiles when tension or bending are applied in test samples for measurement of HE threshold were also done, aiming at showing gaps on ASTM F1624-12 [1]. Tolerance assessment shows a relative maximum increase of 260% of nominal linearized membrane plus bending (NLMB) stresses regarding the nut runout [2] and for the proprietary nut geometry, such relative increase drops to 126% of NLMB stresses. Highest Hydrogen concentrations could be observed in the neighborhood of the first loaded thread root. FEA of cracked geometry shows that Hydrogen concentration could increase by around 283% around the crack tip, when compared to stud bolt in unloaded condition. Integrity assessment according to API 579-1 [3] or BS 7910 [4] and tests conducted according to ASTM F1624-12 [1] show less conservative results.

Dry matter accumulation by Piceasitchensis seedlings during winter

1978 ◽  
Vol 8 (2) ◽  
pp. 207-213 ◽  
Author(s):  
Ian K. Bradbury ◽  
D. C. Malcolm
Keyword(s):  
Soil Temperature ◽  
Dry Matter ◽  
Dry Weight ◽  
Relative Increase ◽  
Weight Increase ◽  
Dry Matter Accumulation ◽  
Weight Changes ◽  
Incoming Radiation ◽  
Matter Production ◽  
Harvest Intervals

Dry matter production by Sitka spruce seedlings (Piceasitchensis (Bong.) Carr) outside the period of shoot extension was determined in southern Scotland by harvesting plants from a nursery on 13 occasions between late September and mid-May. Air and soil temperature and incoming radiation were measured in an attempt to relate weight changes to climatic variables. Dry weight of the plants apparently doubled between late September and mid-April but subsequently changed little. Most dry weight increase occurred during October, late March, and April but there was also a slight increase in weight in midwinter. The relative increase in weight was similar in roots and shoots until mid-January but thereafter was proportionally much greater in shoots than in roots and was associated with a marked increase in needle weight. Lack of weight increase in late spring was attributed to the respiratory demands of bud expansion. Dry matter changes in the 12 harvest intervals was not related to mean daily temperature, incoming radiation, or photoperiod, but when averaged over periods of 1 month a much closer relationship was evident.

Epidemiology of multiple myeloma in city Moscow

2019 ◽  
Vol 91 (7) ◽  
pp. 83-92
Author(s):  
O Yu Vinogradova ◽  
V V Ptushkin ◽  
M V Chernikov ◽  
Yu B Kochkareva ◽  
V A Zherebtsova
Keyword(s):  
Multiple Myeloma ◽  
Overall Survival ◽  
Life Expectancy ◽  
Maximum Increase ◽  
The Past ◽  
Gender And Age ◽  
Moscow City ◽  
International Data ◽  
Age Range ◽  
The City

Aim. To study the epidemiology of multiple myeloma in the city of Moscow and compare the results obtained with data from similar studies in other countries. Materials and methods. The study is based on information from a database of case histories of 3942 patients suffering from symptomatic MM, residents of the city of Moscow, which is maintained at the Hematologic Moscow City Center of S.P. Botkin Municipal Clinical Hospital. The control of the completeness of inclusion was carried out by cross - comparison with the data of the Moscow Cancer Register and the Register of Program 7 (beginning in 2019 - 12) of Highly Expensive Nosologies. The assessment was made according to data as of January 1, 2019. The calculations were carried out taking into account the data of Rosstat at the beginning of 2019 on the population of Moscow in different gender and age categories. Results. Among the 3942 patients with active MM 1707 men - 43% and 2241 women - 57%, the median of the current age was 68 (28-94) years. The median time of observation of patients since the diagnosis of the disease 34 (1-423) months. The peak incidence was in the age range of more than 60 years. There were no significant differences in gender ratio in different age strata with a breakdown of 10 years. The number of cases of newly diagnosed MM per year for the period from 2009 (n=219) to 2018 (n=385) increased by 75.8%. At the same time, the demonstrated increase in the incidence rate for the described period turned out to be fair only for groups of patients over 50 years old, with the maximum increase in this indicator over the described period in the age range of 60-69 years. This is mainly due to the increase in life expectancy in Moscow in recent years. The study demonstrated that over the past 10 years, the average annual mortality rate from MM has decreased in Moscow, and as a result, its prevalence has increased. The rate of 2-year overall survival of patients with MM was 76%, 5-year - old - 49%, 10-year - old - 27%. The median overall survival of patients under the age of 65 when diagnosing the disease was 79 months, and 48 months. The distribution of patients within international classifications was consistent with international data. Conclusions. The study revealed a significant dynamic of the epidemiological situation concerning MM in Moscow. Over the past 10 years there has been an increase in the incidence of MM, as a result of an increase in the life expectancy of the population. The use of modern diagnostics and therapy of MM in real clinical practice has led to a significant reduction in mortality. Due to these factors, an increase in the prevalence of MM in Moscow has taken place, and this process will no doubt progress in the future.

scholarly journals Poster Abstract

2016 ◽  
Author(s):  
Sujata Das
Keyword(s):  
Incidental Finding ◽  
Ca 125 ◽  
Cavernous Haemangioma ◽  
Ovarian Mass ◽  
Lower Abdomen ◽  
Poster Abstract ◽  
Normal Limits ◽  
Ultrasound Findings ◽  
Ovarian Lesion ◽  
Age Range

Haemangiomas of the ovary are very rare neoplasms with a wide age range and present with pain lower abdomen and adenexal mass. Many a times this is an incidental finding on surgery. These neoplasms should be considered in the differential diagnosis of haemorragic ovarian lesion. A 48 yr old female presented to us with pain lower abdomen and adenexal mass. Her routine investigations were normal. Her tumour markers were S. LDH 213, CEA 1.72, CA 125 was 2.3. Ultrasound findings showed a well defined echogenic mass in left ovary measuring 6 x 3.4 cm with no ascitis. Her cervical cytological findings were with in normal limits. Staging laprotomy was done and a bilobed solid ovarian mass was identified on left side. TAH with BSO was done and specimen saved for histopathology that finally showed cavernous haemangioma of ovary. Post op recovery was uneventful with subsequent relief of pain.

scholarly journals Gene Expression of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH) Receptors in Some of the Reproductive Organs of Giant African Land Snail (Archachatina marginata)

2019 ◽  
pp. 1-10 ◽  
Author(s):  
O. J. Osunkeye ◽  
O. M. Onagbesan ◽  
J. A. Abiona ◽  
S. O. Jinadu
Keyword(s):  
Gene Expression ◽  
Ultra Violet ◽  
Land Snail ◽  
Reproductive Organs ◽  
Relative Increase ◽  
Reproductive Age ◽  
Treatment Groups ◽  
Hormonal Effect ◽  
The Common

The role of receptors in the exertion of the hormonal effect on their target cell creates a better understanding of the mechanism of action of hormones. In the snail, Archachatina marginata, there is a dearth of information on the gene expression of FSH and LH receptors. This experiment was conducted to determine the effects of exogenous administration of gonadotropin (PMSG) and some sex steroid hormones (Progesterone (P4) and 17β-Oestradiol (E2)) on the levels of gene expression of FSH and LH in some selected reproductive organs of Archachatina marginata. The experiment was laid out in 4x3x2 factorial design in Completely Randomised Design comprising of 432 snails randomly allotted to 24 treatment groups of 18 snails per group of Control, P4, E2 and PMSG at 3 dosage levels (Low-1 µg/ml, Medium-5 µg/ml and High-10 µg/ml for P4 and E2; and Low-1 IU/ml, Medium-10 IU/ml and High-20 IU/ml for PMSG) at 2 durations of injections (16-days of four injections and 32-days of eight injections). The gel viewed under the ultra-violet light source showed that the expression of LHR receptor did not appear in all the organs considered. However, FSHR receptor was noted in their appearance in the albumen gland, little hermaphrodite duct, common hermaphrodite duct and vagina of A. marginata. Administration of E2 of 5 µg/ml for 16 days and 32 days increase the gene expression of FSH receptors in the common hermaphrodite duct and vagina of A. marginata respectively. Also, injections of 5 µg/ml of P4 for 16 days gave a relative increase in the levels of expression of FSH receptors in the little hermaphrodite duct, while the highest level was on the albumen of snails injected with 1 µg/ml of E2 for 32-days of eight injections. Injection of 5 µl/ml of P4 for 16-days of four injections, 5 µl/ml of E2 for 32-days of eight injections, 5 µl/ml of E2 for 16-days of four injections, 1 µl/ml of E2 of 32-days of eight injections increased the gene expression of FSH in the little hermaphrodite duct, vagina, common hermaphrodite duct and albumen respectively. Therefore, it is informed here that administration of P4, E2 and PMSG exogenously to A. marginata of reproductive age induces an increase in the levels of gene expression of FSH receptors.

Cytoplasmic Tubules in Cells Infected with Laryngotracheitis Virus

1969 ◽  
Vol 27 ◽  
pp. 376-377
Author(s):  
A. M. Watrach
Keyword(s):  
Tissue Culture ◽  
Small Proportion ◽  
Chicken Embryo ◽  
Culture Cells ◽  
Tissue Culture Cells ◽  
Morphologic Characteristics ◽  
Infectious Laryngotracheitis ◽  
Laryngotracheitis Virus ◽  
In Cells

During a study of the development of infectious laryngotracheitis (LT) virus in tissue culture cells, unusual tubular formations were found in the cytoplasm of a small proportion of the affected cells. It is the purpose of this report to describe the morphologic characteristics of the tubules and to discuss their possible association with the development of virus.The source and maintenance of the strain of LT virus have been described. Prior to this study, the virus was passed several times in chicken embryo kidney (CEK) tissue culture cells.

Ultrastructural aspects of gymnosperms reproductive organs tissues due to their functional condition

1978 ◽  
Vol 36 (2) ◽  
pp. 440-441
Author(s):  
G. M. Kozubov
Keyword(s):  
Metabolic Activity ◽  
Functional Condition ◽  
Reproductive Organs ◽  
Considerable Change ◽  
Complicated Structure ◽  
Tetrad Stage ◽  
Ubisch Bodies ◽  
Similar Organization ◽  
Female Reproductive Organs ◽  
High Metabolic Activity

The ultrastructure of reproductive organs of pine, spruce, larch and ginkgo was investigated. It was found that the male reproductive organs possess similar organization. The most considerable change in the ultrastructure of the microsporocytes occur in meiosis. Sporoderm is being laid at the late tetrad stage. The cells of the male gameto-phyte are distinguished according to the metabolic activity of the or- ganells. They are most weakly developed in the spermiogenic cell. Ta-petum of the gymnosperms is of the periplasmodic - secretorial type. The Ubisch bodies which possess similar structure in the types investigated but are specific in details in different species are produced in tapetum.Parietal and subepidermal layers are distinguished for their high metabolic activity and are capable of the autonomous photosynthesis. Female reproductive organs differ more greatly in their struture and have the most complicated structure in primitive groups. On the first stages of their formation the inner cells of nucellus are transformed into the nucellar tapetum in which the structures similar to the Ubisch bodies taking part in the formation of the sporoderm of female gametophyte have been found.

Ultrastructural Study of Human Testicular Biopsies in Infertility

1976 ◽  
Vol 34 ◽  
pp. 156-157
Author(s):  
Shirley Siew ◽  
Philip Troen ◽  
Howard R. Nankin
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Basement Membrane ◽  
Leydig Cells ◽  
Clinical Evidence ◽  
Young Male ◽  
Germinal Epithelium ◽  
Transmission Electron ◽  
Age Range ◽  
Male Subjects

Testicular biopsies were obtained from six young male subjects (age range 24-33) who complained of infertility and who had clinical evidence of oligospermia. This was confirmed on histological examination which showed a broad spectrum from profound hypospermatogenesis to relatively normal appearing germinal epithelium. Thickening of the tubular walls was noted in half of the cases and slight peritubular fibrosis in one. The Leydig cells were reported as normal or unremarkable.Transmission electron microscopy showed that the thickening of the supporting tissue of the germinal epithelium was caused more by an increase in the thickness of the layers of the lamina propria than of the tubular wall itself. The changes in the basement membrane of the tubular wall consisted mostly of a greater degree of infolding into the tubule and some reduplication which gave rise to a multilayered appearance.

Meeting the Best Practice for Hearing Aid Verification in Children: Challenges and Future Directions

2019 ◽  
Vol 28 (4) ◽  
pp. 877-894
Author(s):  
Nur Azyani Amri ◽  
Tian Kar Quar ◽  
Foong Yen Chong
Keyword(s):  
Clinical Practice ◽  
Hearing Aids ◽  
Best Practice ◽  
Hearing Aid ◽  
Evidence Based ◽  
Future Directions ◽  
Major Barrier ◽  
Klang Valley ◽  
Age Range ◽  
Fitting Hearing Aids

Purpose This study examined the current pediatric amplification practice with an emphasis on hearing aid verification using probe microphone measurement (PMM), among audiologists in Klang Valley, Malaysia. Frequency of practice, access to PMM system, practiced protocols, barriers, and perception toward the benefits of PMM were identified through a survey. Method A questionnaire was distributed to and filled in by the audiologists who provided pediatric amplification service in Klang Valley, Malaysia. One hundred eight ( N = 108) audiologists, composed of 90.3% women and 9.7% men (age range: 23–48 years), participated in the survey. Results PMM was not a clinical routine practiced by a majority of the audiologists, despite its recognition as the best clinical practice that should be incorporated into protocols for fitting hearing aids in children. Variations in practice existed warranting further steps to improve the current practice for children with hearing impairment. The lack of access to PMM equipment was 1 major barrier for the audiologists to practice real-ear verification. Practitioners' characteristics such as time constraints, low confidence, and knowledge levels were also identified as barriers that impede the uptake of the evidence-based practice. Conclusions The implementation of PMM in clinical practice remains a challenge to the audiology profession. A knowledge-transfer approach that takes into consideration the barriers and involves effective collaboration or engagement between the knowledge providers and potential stakeholders is required to promote the clinical application of evidence-based best practice.

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