The gross morphology of the albumen gland of the edible land snail Archachatina marginata ovum (Pfeiffer) was studied by measurement of the shell length of the snails and wet weight of albumen gland of specimens collected from wild. Additionally, the structure of the albumen gland was studied by light and electron microscopy. The gland is large during the breeding season and there is no correlation between its weigh and the shell length of the snail. The albumen gland is made up of tubules which consist of closely packed single layer of elongated columnar secretory cells arranged radially around a central lumen. The secretory cells have large nuclei, secretory granules and are densely packed with rough endoplasmic reticulum. The secretory cells of the albumen gland produce secretions which are massively stored in their cytoplasm. Two types of secretions were identified, small droplets and large globules. The large globule was so extensive that the diameter of the cell was greatly reduced. TEM shows that the secretory globules contain fine morular granules characteristic of glycogen in several cell types and probably beta-glycogen.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.3923/pjbs.2007.322.325 | DOI Listing |
Animals (Basel)
November 2024
Department of Biotechnology, College of Life and Applied Sciences, Yeungnam University, Gyeongsan 38541, Republic of Korea.
Sci Rep
November 2024
DECOD (Ecosystem Dynamics and Sustainability), L'Institut Agro, Ifremer, INRAE, 35042, Rennes, France.
The great pond snail Lymnaea stagnalis has served as a model organism for over a century in diverse disciplines such as neurophysiology, evolution, ecotoxicology and developmental biology. To support both established uses and newly emerging research interests we have performed whole genome sequencing (avg.176 × depth), assembly and annotation of a single individual derived from an inbred line.
View Article and Find Full Text PDFMedicina (Kaunas)
September 2024
Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia.
The available research suggests that dietary patterns with high inflammatory potential, as indicated by a high DII score, may exacerbate inflammation and potentially influence thyroid function. Therefore, the aim of this study was to investigate the associations between the inflammatory potential of a diet and thyroid function in adults with Hashimoto's thyroiditis (HT). A total of 149 adults diagnosed with Hashimoto's thyroiditis were enrolled in this observational, cross-sectional, multicenter study.
View Article and Find Full Text PDFOpen Vet J
August 2024
Division of Veterinary Medicine, Department of Health and Life Sciences, Faculty of Health, Medicine, and Life Sciences, Universitas Airlangga, Banyuwangi, Indonesia.
Background: Due to their efficient insulation, lack of sweat glands, relatively quick metabolic rate, and heightened sensitivity to heat, the poultry industry faces a serious problem with heat stress. Combining vitamins has been demonstrated to be more effective than implementing a single vitamin in reducing the effects of heat stress.
Aim: This study aimed to investigate the efficacy of the multivitamin combination in feed on the growth performance, egg quality, and antioxidant enzymes in laying hens exposed to heat stress.
Biomedicines
August 2024
Department of Pathophysiology, University of Split School of Medicine, 21000 Split, Croatia.
Nephrotic syndrome is a clinical syndrome characterized by massive proteinuria, called nephrotic range proteinuria (over 3.5 g per day in adults or 40 mg/m per hour in children), hypoalbuminemia, oncotic edema, and hyperlipidemia, with an increasing incidence over several years. Nephrotic syndrome carries severe morbidity and mortality risk.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!