Results 111 to 120 of about 202 (147)
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Journal of Invertebrate Pathology, 1970
Abstract Digestive gland tissues from the gastropods Helisoma duryi normale (strain HI-3), Helisoma trivolvis, Tarebia granifera , and Melania newcombi were transplanted into the cephalopedal sinuses of H. duryi normale (strain HI-2), and their fates were traced by examining histological sections fixed at 24, 48, 96, 192, and 384 hr post ...
T C, Cheng, P C, Galloway
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Abstract Digestive gland tissues from the gastropods Helisoma duryi normale (strain HI-3), Helisoma trivolvis, Tarebia granifera , and Melania newcombi were transplanted into the cephalopedal sinuses of H. duryi normale (strain HI-2), and their fates were traced by examining histological sections fixed at 24, 48, 96, 192, and 384 hr post ...
T C, Cheng, P C, Galloway
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Reproduction in Physa pomilia and Helisoma duryi
Animal Behaviour, 1959Abstract On the basis of available information, the Lymnaeidae and Physidae are capable of reproducing through self-fertilisation; the Planorbidae are less successful. Although the first two lamilies mentioned can reproduce in this manner the data indicate that this is not likely to be the general mode of reproduction since cross-copulation and hence
Robert M. DeWitt, William C. Sloan
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Insulin-like peptide(s) in the central nervous system of the snail Helisoma duryi
Brain Research, 1992The central nervous system of the snail Helisoma duryi contains porcine insulin-immunoreactive cells. Most of these cells are known as neurosecretory mediodorsal cells (MDC), and are involved in regulation of growth. There are about 25-40 large and small MDC in each cerebral ganglion near the commissure.
H R, Khan, B, Griffond, A S, Saleuddin
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Neurosecretion and shell regeneration in Helisoma duryi (Mollusca: Pulmonata)
Canadian Journal of Zoology, 1976The distribution of cells that stain positively with paraldehyde fuchsin (PAF) in the brain of Helisoma duryi has been mapped. Two cell groups occur in the visceral ganglion, one of which (group 1) has been shown to contain electron-dense secretory granules resembling neurosecretory material.
R. M. Dillaman +2 more
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2021
Aquatic reservoirs remain the ultimate sink of chemical pollutants emanating from anthropogenic activities such as agricultural, industrial and mining processes. Chemicals such as pesticides, heavy metals and polycyclic hydrocarbons are generated during the various processes carried out by man and these chemicals find their way to aquatic bodies via ...
Basopo, Norah, Ngabaza, Thamsanqa
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Aquatic reservoirs remain the ultimate sink of chemical pollutants emanating from anthropogenic activities such as agricultural, industrial and mining processes. Chemicals such as pesticides, heavy metals and polycyclic hydrocarbons are generated during the various processes carried out by man and these chemicals find their way to aquatic bodies via ...
Basopo, Norah, Ngabaza, Thamsanqa
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Effects of Castration on Growth and Reproduction ofHelisoma duryi(Mollusca: Pulmonata)
International Journal of Invertebrate Reproduction and Development, 1987Summary Castration of Helisoma duryi disturbs the balance between growth and reproduction in favour of growth, as is evidenced by the stimulation of body and shell growth and reduction in egg mass production when compared with sham operated controls. Female accessory sex organ wet weight is increased in castrated and virgin snails.
S. L. Miksys, A. S.M. Saleuddin
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Journal of Invertebrate Pathology, 1969
Abstract Three groups of the snail Helisoma duryi normale were challenged with the bacteria Escherichia coli, Micrococcus roseus , and Staphylococcus aureus , respectively, and bled at various subsequent time intervals. The hemolymph samples were subjected to total protein concentration determinants, detection for agglutinins and lysins, and ...
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Abstract Three groups of the snail Helisoma duryi normale were challenged with the bacteria Escherichia coli, Micrococcus roseus , and Staphylococcus aureus , respectively, and bled at various subsequent time intervals. The hemolymph samples were subjected to total protein concentration determinants, detection for agglutinins and lysins, and ...
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Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1987
Abstract 1. 1. A Mg 2+ -dependent and HCO 3 -stimulated ATPase from a microsomal preparation of kidney in the freshwater snail Helisoma duryi has been characterized. 2. 2. The enzyme shows a maximum activity at a concentration of 40 mM KHCO 3 , with an apparent K a of 7.14 mM KHCO 3 . 3. 3. The Michaelis—Menten constant ( K m ) of 0.
A.M. Bhouyain, A.S.M. Saleuddin
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Abstract 1. 1. A Mg 2+ -dependent and HCO 3 -stimulated ATPase from a microsomal preparation of kidney in the freshwater snail Helisoma duryi has been characterized. 2. 2. The enzyme shows a maximum activity at a concentration of 40 mM KHCO 3 , with an apparent K a of 7.14 mM KHCO 3 . 3. 3. The Michaelis—Menten constant ( K m ) of 0.
A.M. Bhouyain, A.S.M. Saleuddin
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Some biological effects of Bayluscide on Physa acuta and Helisoma duryi.
Journal of the Egyptian Society of Parasitology, 1992The fecundity, viability and the size of egg-masses were studied in Physa acuta and Helisoma duryi snails treated with 1 ppm Bayluscide for two hours. Bayluscide application caused significant and highly significant reduction in the fecundity of both Physa acuta and Helisoma duryi.
H I, el-Gindy +2 more
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Tissue and Cell, 1997
The endocrine dorsal bodies of gastropod molluscs regulate reproduction and are closely associated with the central nervous system. Previous studies on Helisoma duryi have shown that the dorsal body cells of reproducing snails contain more gap junctions than those of non-reproducing virgin snails. More dorsal body cells were isolated from virgin snails
H R, Khan, R R, Shivers, A S, Saleuddin
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The endocrine dorsal bodies of gastropod molluscs regulate reproduction and are closely associated with the central nervous system. Previous studies on Helisoma duryi have shown that the dorsal body cells of reproducing snails contain more gap junctions than those of non-reproducing virgin snails. More dorsal body cells were isolated from virgin snails
H R, Khan, R R, Shivers, A S, Saleuddin
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