AMOURA M. ABOU-EL-NAGA¹, SHAKER A. MOUSA², FAYEZ ALTHOBAITI³, EMAN FAYAD^3,*, ENGY S. FAHIM¹

BIOCELL, Vol.46, No.2, pp. 535-545, 2022, DOI:10.32604/biocell.2022.017739 - 20 October 2021

Abstract Testicular damage is one of the most hazardous effects as it’s associated with azoospermia. Busulfan (Bu) is a highly toxic chemotherapeutic drug that affects testis. Thirty male Swiss albino mice divided into six groups of 5 animals each. Control (oral 0.9% saline daily for 75 days); Mel (20 mg/kg/day orally for 30 days); ZnO NPs (5 mg/kg/day i.p. for 30 days); BU (single i.p. injection of 40 mg/kg and then left for 45 days); BU + Mel (single 40 mg/kg dose of BU and left for 45 days followed by 20 mg/kg/day Mel for 30 More >

KHESLLER PATRÍCIA OLAZIA^1,2, JULIANA SOUZA DA SILVA¹, GUILHERME SIRIMARCO DE SOUZA TONELLI¹, SÔNIA NAIR BÁO^1,*

BIOCELL, Vol.46, No.1, pp. 275-283, 2022, DOI:10.32604/biocell.2022.016603 - 28 September 2021

Abstract In this study, the sperm ultrastructure of three species of Idarnes genus was investigated using light and transmission electron microscopy. Spermatozoon morphology of the three species was similar to that of most Chalcidoidea, with helicoidally twisted nucleus and flagellum. The head region consists of an acrosome and a nucleus; the nucleus-flagellum transition region characterized by the presence of mitochondrial derivatives and the centriolar adjunct; a flagellum region, which includes the axoneme with microtubular arrangement 9 + 9 + 2 and two mitochondrial derivatives. However, the sperm of these three species exhibit features that discriminate one species… More >

LORENZO ALIBARDI¹, BERND NOECKER²

BIOCELL, Vol.45, No.4, pp. 1013-1022, 2021, DOI:10.32604/biocell.2021.013913 - 22 April 2021

Abstract The differentiation of cells composing mature human hairs produces layers with different corneous characteristics that would tend to flake away one from another, as in the corneous layer of the epidermis, without anchoring junctions. It is likely that cell junctions established in the forming cells of the hair bulb are not completely degraded like in the corneous layer of the epidermis but instead remain in the hair shaft to bind mature cuticle, cortex, and medulla cells into a compact hair shaft. During cell differentiation in hairs, cell junctions seem to disappear, and little is known… More >

Mohammad Maghsoudi-Ganjeh, Xiaodu Wang^*, Xiaowei Zeng^*

CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.1, pp. 1-32, 2020, DOI:10.32604/cmes.2020.012123 - 18 September 2020

Abstract In this review, a brief presentation is first given to the hierarchical structure and mechanical behavior of bone. Then, the recent advancements in nanoscale characterization of bone ultrastructure and ingredients are discussed based on an extensive quantity of references in the literature.Moreover, computational and analytical bone mechanics at ultrastructure levels are critically reviewed with the growing body of knowledge in the field. The computational and analytical models are summarized in several categories for ease of understanding bone nanomechanics and their applicability/limitations. This review is expected to provide a well-informed foundation for the researchers interested in More >

Montes B^1,2, MG Murray^1,3

Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 201-208, 2015, DOI:10.32604/phyton.2015.84.201

Abstract Palynological studies contribute to understanding the taxonomy, phylogeny and ecology of the Asteraceae and other families. In this study, pollen morphology and ultrastructure of the exine of Senecio bergii Hieron. were studied using light, scanning and transmission electron microscopy. The pollen of this species is prolate-spheroidal, it has a Senecioid pattern on the exine and an apertural system composed of three apertures (ecto-, meso- and endoapertures). This pollen type is defined as tricolpororate due to the triple apertural system. This is the first description of the ultrastructure of the apertural system of the pollen of Argentine species More >

Silvana L. D’AMICO¹, Patricia I. LEONARDI ^1,2*, Eduardo J. CÁCERES¹

BIOCELL, Vol.37, No.3, pp. 85-90, 2013, DOI:10.32604/biocell.2013.37.085

Abstract This is the first comprehensive ultrastructural study on dwarf males with external gametangia in the ge in the genus Oedogonium, from androspore germination to the liberation of mature male gametes. The ultrastructure of the process in O. macrandrium Wittrok is similar to that of Bulbochaete hiloensis (Nordstedt) Tiffany, butwith two remarkable differences. In O. macrandrium : 1) instead of a true transverse wall, only condensed mucilage appears between the gametes of each antheridial cell, and 2) the cell wall between the basal cell and the basal most antheridial cell has simple plasmodesmata similar to those More >

Li G, FT Yang, XL Jiang, FX Chen, TH Cao, LC Wang

Phyton-International Journal of Experimental Botany, Vol.82, pp. 243-247, 2013, DOI:10.32604/phyton.2013.82.243

Abstract The aim of this study was to evaluate the impact of the plow pan on the production of spring corn. We evaluated SPAD values and chloroplast ultrastructure in premature ear leaves of spring maize at the grain-filling stage. The maize plants were grown in simulated plow pan or simulated subsoiling treatments. Plants in the simulated plow pan treatment showed irreversible damage to chloroplasts, including changes in chloroplast shape, disintegration and rupture of chloroplast membranes, and blurriness and cloudiness of grana lamellae. The chlorophyll content decreased, which is a typical characteristic of senescence. Subsoiling cultivation practices More >

ADELINA FERREIRA^1,* AND MAHMOUD MEHANNA²

BIOCELL, Vol.36, No.2, pp. 57-62, 2012, DOI:10.32604/biocell.2012.36.057

Abstract The reproductive cycle in anurans may be either continuous or discontinuous. These differences may be connected to seasonal climate changes and/or to anthropic activity. Forty adult male individuals of the Dendropsophus minutus species were collected during one year, in the municipality of Chapada dos Guimarães (Mato Grosso, Brazil). The testicles were studied under light and transmission electron microscopy. No variations were observed when the diameter of the seminiferous tubules and the thickness of the interstitial tissue were studied. However, changes in spermatogenesis were conspicuous and indicated that the reproductive cycle of D. minutus in Chapada dos Guimarães More >

M.M. GOTELLI*, B.G. GALATI, D. MEDAN

BIOCELL, Vol.34, No.3, pp. 133-138, 2010, DOI:10.32604/biocell.2010.34.133

Abstract This is the first report of the ultrastructure of the stigma and style during and after anthesis in Helianthus annuus L. using light and transmission electron microscopy. The stigma is bifid with unicellular papillae. There is no secretion of lipids, carbohydrates or proteins at anthesis. The style is semisolid in the upper portion, closer to the stigma, and becomes solid below. Ultrastructural changes on cells of the stigma and the style are described. The transmitting tissue of the ovule is first evident 40 minutes after pollination and persists during the first stages of embryogenesis. Only one More >

GISELE ORLANDI INTROÍNI¹, FERNANDA MARTINS MAESTER¹, FOSCA Pedini PEREIRA LEITE² AND SHIRLEI MARIA RECCO-PIMENTEL¹

BIOCELL, Vol.34, No.3, pp. 103-112, 2010, DOI:10.32604/biocell.2010.34.103

Abstract Ultrastructural analyses of bivalve spermatozoa are relevant in studies that aim to identify taxonomic traits for the purposes of discriminating species and conducting phylogenetic studies. In the present work, spermatozoa of mussel specimens of the genus Mytella, collected from two populations living in distinct habitats, were examined by electron microscopy. The objective was to identify sperm ultrastructural taxonomic traits that could be used to differentiate Mytella species. The specimens were from populations that live in intertidal zones on the southeast coast of Brazil, either buried in muddy-sand sediment or anchored to rocky substrates. The acrosomal vesicle… More >