Showing papers by "Maleeya Kruatrachue published in 2003"
TL;DR: Investigation of the potential use of dried Spirodela polyrrhiza biomass as an adsorbent for the removal of the basic dye methylene blue from aqueous solution showed that as the amount of the dried S. polyr rhiza increased, the percentage of dye sorption increased accordingly, and the process followed the first-order rate kinetics.
451 citations
TL;DR: The study showed that gill lamellae and kidney tubules were the primary target organs for the acute toxic effect of cadmium while in the subchronic exposure, the toxic effect to gills was less than that of kidney and liver.
439 citations
TL;DR: The results indicated that long‐term exposure to glyphosate at sublethal concentrations had adverse effects on the histopathological and biochemical alterations of the fish.
Abstract: In Oreochromis niloticus that had been exposed for 3 months to sublethal concentrations (5 and 15 ppm) of the commercial glyphosate herbicide (C(3)H(8)NO(5)P) Roundup, the organs exhibited varying degrees of histopathological change. In the gills filament cell proliferation, lamellar cell hyperplasia, lamellar fusion, epithelial lifting, and aneurysm were observed. In the liver there were vacuolation of hepatocytes and nuclear pyknosis. Kidney lesions consisted of dilation of Bowman's space and accumulation of hyaline droplets in the tubular epithelial cells. The structural damages could be correlated to the significant increase (p
223 citations
13 citations
TL;DR: An ultrastructural study of male germ cells in the testes of Haliotis ovina revealed that spermatogenesis could be classified into 13 stages, based on the pattern of chromatin condensation and distribution of organelles, as follows.
Abstract: An ultrastructural study of male germ cells in the testes of Haliotis ovina revealed that spermatogenesis could be classified into 13 stages, based on the pattern of chromatin condensation and distribution of organelles, as follows: the spermatogonium; five stages of the primary spermatocyte; the secondary spermatocyte; five stages of the spermatid; and the spermatozoa. Each spermatogonium was round or oval, with a euchromatic nucleus and prominent nucleolus. The primary spermatocytes were divided into five stages: leptotene (LSc); zygotene (ZSc); pachytene (PSc); diplotene (DSc); and metaphase (MSc). The nucleus of the LSc contained scattered small heterochromatin blocks that were increasingly thickened in the ZSc. The PSc was characterised by a bouquet pattern of heterochromatin fibres. The DSc decreased in size, resulting in close clumping of chromatin blocks, whereas in the MSc, long and large blocks of chromosomes were formed and then moved to be aligned along the equatorial region. Secondary spermatocyte showed thick chromatin blocks that appeared reticulate. The spermatid could be divided into five stages (St1–5). The St1 was a large round cell and its nucleus contained homogeneous chromatin granules. In St2, the nuclear chromatin started to condense into patches. The St3 was smaller with a round nucleus containing dark blocks of heterochromatin. The St4 became smaller still, with a round opaque nucleus. The St5 was the smallest round cell, with almost completely condensed chromatin. The spermatozoon had a round to barrel-shaped head that contained completely condensed chromatin covered by a conical acrosome. The posterior border of the nucleus was flanked by five large spherical mitochondria and the tail consisted of axonemal microtubules surrounded by the plasma membrane.
5 citations
01 Jan 2003
TL;DR: This paper presents a probabilistic study of the immune system in response to infectious disease and its role in the development of infectious diseases.
Abstract: W Jiraungkoorskul, S Sahaphong, E S Upatham , M Kruatrachue, P Pokethitiyook, S Vichasri-Grams , S Riengrojpitak 1 Department of Pathobiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand 2 Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand 3 Mahidol University International College, Mahidol University, Salaya Campus, Nakornpathom 73170, Thailand 4 Burapha University, Chonburi 20131, Thailand
1 citations