Hormonal control of melanin pigmentation in scrotal skin of the rat

ABSTRACT Ribonuclease activity in thymus and lymph nodes is stimulated by cortisone; insulin increases ribonuclease activity only in the thymus. Growth hormone and theophylline do not cause changes in thymus and lymph nodes ribonuclease levels. Injections of cortisone combined with growth hormone or with theophylline increase the activity more than cortisone alone. Insulin does not enhance the action of cortisone on ribonuclease activity. A synergistic loss in weight of thymus and spleen was found after administration of cortisone in combination with either growth hormone or with theophylline.

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STUDIES ON THE HORMONAL CONTROL OF SODIUM METABOLISM IN THE RAINBOW TROUT (SALMO GAIRDNERI)

Acta Endocrinologica ◽

10.1530/acta.0.xxxi0587 ◽

1959 ◽

Vol XXXI (IV) ◽

pp. 587-602 ◽

Cited By ~ 38

Author(s):

W. N. Holmes

Keyword(s):

Rainbow Trout ◽

Hormonal Control ◽

Salmo Gairdneri ◽

Sodium Metabolism

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Hormonal control of [beta]-cell proliferation in fetal ovine pancreatic isletsin vitro

Endocrine Abstracts ◽

10.1530/endoabs.38.p140 ◽

2015 ◽

Author(s):

Shelley E Harris ◽

Amy Kelly ◽

Melissa A Davis ◽

Miranda Anderson ◽

Alison J Forhead ◽

...

Keyword(s):

Cell Proliferation ◽

Beta Cell ◽

Hormonal Control ◽

Beta Cell Proliferation

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Pengetahuan Mahasiswi Universitas Al Azhar Indonesia Terhadap Premenstrual Syndrome

JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI ◽

10.36722/sst.v2i3.141 ◽

2015 ◽

Vol 2 (3) ◽

pp. 193

Author(s):

Riris Lindiawati Puspitasari ◽

Dewi Elfidasari ◽

Kun Mardiwati Rahayu

Keyword(s):

Premenstrual Syndrome ◽

Population Sample ◽

Reproductive Organs ◽

Cross Sectional Study ◽

Hormonal Control ◽

P Value ◽

Cross Sectional ◽

Knowledge Age ◽

Physical Changes ◽

Age Of Menarche

Abstrak – Tahap perkembangan remaja ditandai dengan perubahan fisik umum yang disertai perkembangan kognitif maupun sosial. Menstruasi merupakan proses alamiah organ reproduksi wanita dengan pengendalian hormon. Salah satu gangguan menstruasi adalah Premenstrual Syndrome atau sindrom sebelum haid atau dikenal juga sebagai ketegangan sebelum haid. Siklus menstruasi yang tidak teratur, penurunan level progesteron dan peningkatan level estrogen, stres, usia menarche yang terlalu cepat, dan status gizi merupakan beberapa faktor penyebab PMS. Penelitian ini bertujuan untuk mengetahui pengetahuan mahasiswi Universitas Al Azhar Indonesia terhadap PMS. Metodologi yang digunakan yaitu studi Cross Sectional. Populasi sampel penelitian adalah mahasiswi Universitas Al Azhar Indonesia. Variabel independen yang dipilih yaitu pengetahuan, usia menarche, siklus haid, olahraga, nutrisi, produktivitas, dan indeks massa tubuh (IMT). Berdasarkan uji bivariat dan multivariat regresi logistik tidak ditemukan hubungan yang signifikan antara pengetahuan dengan premenstrual syndrome pada mahasiswi UAI yaitu pengetahuan dengan p value 0,169; OR 0,473; 95% CI 0,163-1,374. Responden yang memiliki pengetahuan 0,473 kali lebih baik dalam penatalaksanaan premenstrual syndrome daripada responden yang memiliki pengetahuan kurang. Abstract – Adolescent developmental stage characterized by common physical changes that accompanied the cognitive and social development. Menstruation was known as a natural process of hormonal control in the female reproductive organs. One of menstrual disorders was premenstrual syndrome or syndrome before menstruation or also known as tension before menstruation. Irregular menstrual cycles, decreased levels of progesterone, increased level of estrogen, stress, menarche age, and nutritional status were informed as factors that cause premenstrual syndrome. This study aimed to determine student’s knowledge to premenstrual syndrome. The methodology used was a cross sectional study. The population sample was a student of University Al Azhar Indonesia. The independent variables were selected, namely knowledge, age of menarche, menstrual cycle, exercise, nutrition, productivity, and body mass index (BMI). Based on the test bivariate and multivariate logistic regression found no significant relationship between knowledge with premenstrual syndrome in UAI student that knowledge with p value 0.169; OR 0.473; 95% CI 0.163 to 1.374. Respondents who had knowledge 0.473 times better than others in treatment of premenstrual syndrome. Keywords: Premenstrual Syndrome, knowlwdge, menstruation, menarche.

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Comparative Histomorphochemical Studies on Uropygial Gland of Kadaknath and White Leghorn Breeds of Poultry

THE INDIAN JOURNAL OF VETERINARY SCIENCES AND BIOTECHNOLOGY ◽

10.21887/ijvsbt.v13i02.10053 ◽

2017 ◽

Vol 13 (02) ◽

Author(s):

S. Kanasiya ◽

S. K. Karmore ◽

S. K. Deshmukh ◽

R. K. Barhaiya ◽

S. K. Gupta

Keyword(s):

Characteristic Feature ◽

Periodic Acid ◽

Elastic Fibers ◽

Moderate Activity ◽

Uropygial Gland ◽

White Leghorn ◽

Preen Gland ◽

Central Cavity ◽

Tissue Samples ◽

Melanin Pigmentation

The present study was conducted on ten each uropygial glands of 6 to 8 months old healthy Kadaknath and White Leghorn breeds of poultry. The tissue samples were stained by H and E for normal histological structures, Verhoeff’s stain for collagen and elastic fibers, PAS (Periodic Acid Schiff’s) for glycogen and Alcian Blue PAS method for acid mucopolysaccharides. The uropygial gland in Kadaknath and White Leghorn was composed of two lobes. Each lobe had a single duct and these ducts were joined together by isthmus. The thickness of capsule was more in White Leghorn than Kadaknath breed. The lumen of tubules showed higher concentration of secretary product in Kadaknath breed. Numbers of tubules were higher in Kadaknath. No aggregation of lymphocytes was found in the preen gland of White Leghorn, whereas in Kadaknath, there was large number of lymphocytes aggregation alongwith lymphatic nodules. Melanin pigmentation was the characteristic feature of Kadaknath which was found towards the central cavity and in between ductules. The capsule of White Leghorn showed intense PAS activity, while moderate activity was found in Kadaknath breed of poultry. Intense ACPase reaction was noticed in capsule of uropygial gland of Kadaknath and White Leghorn breeds of poultry.

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The role of hormones

10.1093/oso/9780198797500.003.0004 ◽

2018 ◽

Author(s):

H. Frederik Nijhout ◽

Emily Laub

Keyword(s):

Phenotypic Plasticity ◽

Social Behavior ◽

Parental Care ◽

Juvenile Hormone ◽

Reproductive Behavior ◽

Hormonal Control ◽

Plastic Trait

Many behaviors of insects are stimulated, modified, or modulated by hormones. The principal hormones involved are the same as the ones that control moulting, metamorphosis, and other aspects of development, principally ecdysone and juvenile hormone. In addition, a small handful of neurosecretory hormones are involved in the control of specific behaviors. Because behavior is a plastic trait, this chapter begins by outlining the biology and hormonal control of phenotypic plasticity in insects, and how the hormonal control of behavior fits in with other aspects of the control of phenotypic plasticity. The rest of the chapter is organized around the diversity of behaviors that are known to be controlled by or affected by hormones. These include eclosion and moulting behavior, the synthesis and release of pheromones, migration, parental care, dominance, reproductive behavior, and social behavior.

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Distribution of Melanin Pigmentation in 33 Organs of Thai Black-Bone Chickens (Gallus gallus domesticus)

Animals ◽

10.3390/ani10050777 ◽

2020 ◽

Vol 10 (5) ◽

pp. 777

Author(s):

Korakot Nganvongpanit ◽

Piyatida Kaewkumpai ◽

Varankpicha Kochagul ◽

Kidsadagon Pringproa ◽

Veerasak Punyapornwithaya ◽

...

Keyword(s):

Gallus Gallus ◽

Gallus Domesticus ◽

Melanin Pigment ◽

Gallus Gallus Domesticus ◽

Tissue Samples ◽

Melanin Pigmentation ◽

Chicken Breed ◽

Brachial Vein ◽

The Brain ◽

Pigment Accumulation

The black-bone chicken (Gallus gallus domesticus) is a breed of chicken that is commonly found in Thailand. This breed is known for having a number of black colored organs. Consumers have been notably attracted to the black-bone chicken breed for the characteristic darkness that is observed in many of its organs. However, the degree of darkness in all organs of the black-bone chicken is still in question. Importantly, there have not yet been any published reports on the distribution of melanin pigment in the organs of the black-bone chicken. This research study aims to examine the distribution of the melanin pigment in 33 organs of the Thai black-bone chicken. Ten black-bone chickens (five male, five female) were included in this study. Thirty-two organs including the brain, spinal cord, sciatic nerve, larynx, trachea, syrinx, lungs, heart, pericardium, aorta, brachial vein, kidney, cloaca, oviduct, testis, gastrocnemius muscle, femur, tongue, esophagus, crop, proventriculus, gizzard, duodenum, jejunum, ileum, cecum, pancreas, liver, gall bladder, omentum, abdominal fat, spleen, and skin were examined in this study. Histological sections taken from tissue samples of each of these organs were studied. The findings revealed that the presence of the melanin pigment was not significantly different (p > 0.005) between male and female specimens. Notably, the liver was the only organ in which the melanin pigment had not accumulated. Consequently, there was not a uniform pattern of melanin pigment accumulation throughout the organs of the chickens. The melanin pigment was present in all of the tissue layers of most organs, while the melanin pigment was found in only specific layers of some of the organs. In conclusion, the distribution of melanin pigmentation in the organs of each of the animals in this study was found to be different. However, in some tissue samples, such as those obtained from the liver, no accumulation of the melanin pigment was observed.

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