Ctenella aurantia, genre et espèce nouveaux de cténophore tentaculé (Ctenellidae fam.nov.) méditerranéen sans colloblastes et avec ventouses labiales

1993 ◽  
Vol 71 (9) ◽  
pp. 1804-1810 ◽  
Author(s):  
Claude Carré ◽  
Danièle Carré
Keyword(s):  
The Body ◽  
Internal Wall ◽  
Yellow Orange ◽  
Cytological Features ◽  
Cytological Characteristics ◽  
General Organization ◽  
Gastrovascular System

Ctenella aurantia gen. et sp.nov. is a small Mediterranean tentacled ctenophore. Its ovoid and flattened body is opaque and yellow-orange, with red-pigmented areas. Comb rows are arranged in pairs from the apex to the oral third of the body. The tentacular sheaths situated at the end of the oral third of the body open medially; they terminate in an aboral open groove which can close up around the unramified tentacles. The gastrovascular system is simple and follows the axis of the body; it has no peripheral canals but two long apical canals project into the aboral zone. The mouth forms a sagittal slit bordered by two thick lips, each bearing a sucker on its internal wall. The species also possesses very distinctive cytological features, notably the absence of colloblasts on the tentacles and the consistent presence of exogenic cnidocysts that are embedded in the gastrovascular wall. The muscular cells of the oral zone have no sarcomeres, but have both fine and thick myofilaments that are arranged alternately. The species is very distinctive, both in its cytological characteristics and its general organization. It is tentatively classified in the order Cydippida, and its relationship to some other species is mentioned.

Ionic regulation and buoyancy in some planktonic organisms

1993 ◽  
Vol 73 (1) ◽  
pp. 15-23 ◽  
Author(s):  
C. Newton ◽  
W. T. W. Potts
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Body ◽  
Coelomic Fluid ◽  
Ionic Regulation ◽  
High Concentration ◽  
Emission Analysis ◽  
X Ray ◽  
Scanning Electron ◽  
Gastrovascular System

Magnesium/chlorine and sulphur/chlorine ratios have been measured in the body fluids of some planktonic organisms by x-ray emission analysis of frozen hydrated specimens in a scanning electron microscope. Homarus vulgaris (Anthropoda: Decapoda) larvae excluded Mg2+ and SO42-ions from the haemolymph, but to a lesser extent than does the adult lobster. Bipinnaria larvae of Asterias (Echinodermata) excluded Mg2+ and SO42-ions from the coelomic fluid. Obelia medusae excluded Mg2+ and SO42-ions from the mesogloea but concentrate them in the gastrovascular system. The high concentration of sulphate in the gastrovascular fluid of medusae has been confirmed by rhodizonate titration in Cyanea and Rhizostoma jellyfish. Some implications of magnesium and sulphate regulation are discussed.

scholarly journals Analysis of βeta-carotene from Jongi (Dillenia Serrata Thunb.) as a source of vitamin A

2021 ◽  
Vol 10 (2) ◽  
pp. 184-190
Author(s):  
Khairun Nisa ◽  
Ryka Marina Walanda
Keyword(s):  
Chronic Disease ◽  
Vitamin A ◽  
Essential Role ◽  
Antioxidant Activities ◽  
Beta Carotene ◽  
Neurological Function ◽  
The Body ◽  
Yellow Orange ◽  
Β Carotene ◽  
Healthy Eyes

Beta-carotene is converted in the body to vitamin A, a powerful antioxidant that plays an essential role in maintaining healthy eyes, skin, and neurological function. Beta-carotene and other carotenoids have antioxidant activities and are valued for their ability to prevent chronic disease. β-carotene is found in yellow, orange, red, and green fruits. The purpose of this study was to determine the β-carotene in Jongi. Jongi (Dillenia Serrata Thunb.) is an endemic fruit of Sulawesi which contains β-carotene. The samples used in this study were raw jongi and ripe jongi extracted with n-hexane: acetone (1:4). To the samples were analyzed quantitatively using UV-Vis spectrophotometry at a wavelength of 450.00 nm. The results showed that the β-carotene in raw jongi was 0.3554 mg/100 g and the β- carotene in ripe jongi was 1.1841 mg/100 g. Ripe jongi consist of more β-carotene than the raw jongi, hence better as a source of Vitamin A.

scholarly journals Cytological diagnosis of metastatic alveolar rhabdomyosarcoma in the ascitic fluid: Report of a case highlighting the diagnostic difficulties

CytoJournal ◽  
2012 ◽  
Vol 9 ◽  
pp. 9 ◽  
Author(s):  
Andrew C. Nelson ◽  
Charanjeet Singh ◽  
Stefan E. Pambuccian
Keyword(s):  
Ascitic Fluid ◽  
Body Fluid ◽  
Mesothelial Cells ◽  
The Body ◽  
Alveolar Rhabdomyosarcoma ◽  
Cytological Diagnosis ◽  
Malignant Cells ◽  
Diagnostic Difficulties ◽  
Cytological Features ◽  
Fluid Cytology

Alveolar rhabdomyosarcoma is an uncommon tumor affecting adolescents and young adults that is only rarely encountered in body fluid cytology. We report the cytological features of metastatic alveolar rhabdomyosarcoma in the ascitic fluid of a 17-year-old female patient, who had presented with abdominal distention, 21 months after being diagnosed with perirectal alveolar rhabdomyosarcoma. The rare single neoplastic cells that were admixed with abundant reactive mesothelial cells were initially misinterpreted as reactive mesothelial cells. However, their neoplastic nature was established after a careful review of their cytological features and the performance of immunoperoxidase stains. Compared to the reactive mesothelial cells that were present in the sample, the malignant cells were smaller, with less ample and more homogenous cytoplasm. They had slightly larger, more hyperchromatic, and more frequently eccentric nuclei, with larger nucleoli. This case highlights the potential pitfall of the misinterpretation of metastatic alveolar rhabdomyosarcoma cells for reactive mesothelial cells. Awareness of this potential diagnostic problem and recognition of the cytomorphological features of this neoplasm in the body fluids allows the identification of malignant cells, even when they are rare and intimately associated with mesothelial cells.

scholarly journals PREVENTION OF TOXIC-ALLERGIC REACTIONS WHEN USING DENTURES AND DEVICES

2020 ◽  
Vol 16 (3) ◽  
pp. 139-146
Author(s):  
Aleksey Zotov ◽  
Anna Podoprigora ◽  
Yuliya Komarova ◽  
Edvard Kalivradzhiyan ◽  
Ilya Stepanov ◽  
...  
Keyword(s):  
Mucous Membrane ◽  
Chemical Elements ◽  
The Body ◽  
Allergic Reactions ◽  
State University ◽  
Acrylic Polymer ◽  
Quantitative Distribution ◽  
Removable Plate ◽  
Inflammatory Processes ◽  
Cytological Characteristics

Subject. Today, nanoparticles of chemical elements that make up the body are of particular interest. Such nanomaterials usually do not cause allergic reactions, they can potentially be broken down and removed from it, and, for example, drugs can be placed in the pores of these materials. At the Department of Prosthetic Dentistry of V.G. N.N. Burdenko together with Voronezh State University developed a polymer modified with nanosized silver particles, which was successfully tested on patients in the manufacture of removable plate prostheses. However, there is no data on the effect of this polymer in patients with complex jaw pathology in combination with somatic pathology, in which visible changes occur in the oral cavity. Goal ― to consider the problem of prevention of toxic-allergic reactions when using complex-jaw prostheses and devices. To study the state of the oral microbiocenosis and the cytological characteristics of the mucous membrane in patients with apparatus bases made of a polymer modified with nanoscale silver. Materials and methods. 80 people were examined and 60 patients were treated for complete absence of teeth with various degrees of atrophy according to A.I.Doynikov (1967) I, II, III, IV, V, with a uniform quantitative distribution in groups. Methodology. 80 people were examined and 60 patients were treated for complete absence of teeth with various degrees of atrophy according to A.I.Doynikov (1967) I, II, III, IV, V, with a uniform quantitative distribution in groups. Results. The dynamics of the inflammatory processes of the mucous membrane of the prosthetic bed under the bases of removable jaw devices made by the known method and with bases from modified materials was studied. A complex of personalized prevention of complications associated with the action of basic polymers has been developed. Conclusion. Obtained by analyzing the results of the study, it was possible to create, on the basis of the use of modified acrylic polymer as the material of the bases of removable prostheses and devices, a program for individual prevention of the inflammatory complications induced by them from the mucosa of the prosthetic bed, the efficiency level of which is at least 60 %. This predisposes to recommendations for the further implementation of the modified nanosilver acrylic polymer in practical dentistry.

Cytological variation in zoospores of Spizellomyces (Chytridiomycetes)

1984 ◽  
Vol 62 (6) ◽  
pp. 1202-1208 ◽  
Author(s):  
Donald J. S. Barr
Keyword(s):  
Endoplasmic Reticulum ◽  
Microtubule Organizing Center ◽  
Fibrillar Material ◽  
Organizing Center ◽  
Cytological Features ◽  
Cytological Characteristics

The principal cytological features and their variations are described in zoospores of 38 isolates belonging to seven species of Spizellomyces. This genus is distinguished from others in the Spizellomycetaceae by the orientation of the microtubules and the position of the nucleus relative to the kinetosome in the zoospore. Microtubules run apparently at random into the cytoplasm from a microtubule-organizing center (spur) on one side of the kinetosome. The nucleus is anteriorly or centrally positioned with a heel-like process extending to near the proximal face of the kinetosome, or it can be posteriorly positioned and elongate with one end close to the kinetosome. Differences between species are reflected by the position and shape of the nucleus, the extent of the endoplasmic reticulum which in some species circumscribes lipid globules, the presence or absence of an apparent connection by fibrillar material between the kinetosome and a nonfunctional centriole, and the morphology of the microtubule-organizing center. The zoospores of Spizellomyces punctatus (Koch) D. Barr, S. plurigibbosus (D. Barr) D. Barr, and S. palustris (Gaertner) D. Barr are cytologically similar, but those of S. acuminatus (D. Barr) D. Barr, S. dolichospermus D. Barr, S. lactosolyticus D. Barr and S. pseudodichotomus (Umphlett) D. Barr each have one or more distinctive characteristic. Spizellomyces dolichospermus and S. pseudodichotomus also have some cytological characteristics in common with the genus Kochiomyces.

scholarly journals Phototactic Response and Morphometric Characteristic of Climbing Perch Anabas testudineus (Bloch, 1792) Under Culture System

2018 ◽  
Vol 76 (4) ◽  
pp. 164-173 ◽  
Author(s):  
Ahmadi Ahmadi
Keyword(s):  
Culture System ◽  
Mesh Size ◽  
The Body ◽  
Light Traps ◽  
Catch Per Unit Effort ◽  
Anabas Testudineus ◽  
Climbing Perch ◽  
Unit Effort ◽  
Yellow Orange ◽  
The Mean

Abstract Phototaxis in climbing perch (Anabas testudineus) was investigated by subjecting fish to LED light traps (blue, green, yellow, orange, red, white) and control (total 13 traps). The trap was constructed of polyamide (PA) nylon monofilament (31.75 mm mesh size), fastened around two wire ring frames (∅ 490 mm) with a net height of 270 mm. A lamp was placed on the bottom of the trap. 96 individuals, consisting of 34 males and 62 females, were analysed. Both continuous and blinking light traps were considerably higher in the number of catch compared to the control. The body size of catch ranged from 76-135 mm TL and 8.00-55.00 g W. The mean YPUEs (yield per unit effort) for male and female were 4.00 ± 2.25 and 7.00 ± 4.50 g trap−1 trial-1, respectively. The CPUEs (catch per unit effort) for continuous, blinking light traps and the control ranged from 0.43 to 0.93, 0.21 to 0.86, and 0.21 fish trap−1night−1, respectively. The mean condition factor (K) values of 2.10 ± 0.40 for males and 2.13 ± 0.34 for females indicate fish with better condition. Positive group responses of fish were more pronounced in the middle size classes between 90 and 109 mm TL. Negative allometric growth pattern (b) (1.7271-1.8828) was observed, indicating that the culture system should be refined. A. testudineus showed positive phototaxis to the “colors of light”. In addition, efforts to collect climbing perch from the wild for breeding and commercial purposes may benefit from this study.

scholarly journals Cytological diagnosis of osteoblastoma of the talus: Case report with unusual presentation and diagnostic pitfalls

CytoJournal ◽  
2018 ◽  
Vol 15 ◽  
pp. 20
Author(s):  
Smita Chandra ◽  
Neeti Puri ◽  
Meena Harsh ◽  
Anil Kumar Juyal
Keyword(s):  
Needle Aspiration ◽  
The Body ◽  
Unusual Presentation ◽  
Cytological Diagnosis ◽  
Elderly Male ◽  
Appropriate Treatment ◽  
Precise Diagnosis ◽  
Cytological Features ◽  
Extensive Involvement ◽  
Diagnostic Pitfalls

Osteoblastoma is a rare bone tumor mostly affecting the young adults and commonly involving the spinal cord and long bones. Talus is the uncommon site of presentation, and if involved, then the neck is more commonly involved than the body of talus. The cytological diagnosis of osteoblastoma is limited, and to the best of our knowledge, its fine-needle aspiration (FNA) in the talus has still not been reported in the literature. The present case of osteoblastoma is, therefore, being reported due to the unusual presentation in elderly male in the body of talus and showing extensive involvement on X-ray. The case was initially diagnosed on FNA cytology excluding the possibility of giant-cell tumor and osteosarcoma. The case also highlights the importance of vigilant observation of subtle cytological features of this rare tumor which may be helpful in avoiding diagnostic pitfalls, especially at an uncommon site and with unusual presentation. An early precise diagnosis by cytology may be followed by appropriate treatment and thus avoiding any further complications.

scholarly journals Reproductive system morphology of giant barnacle “picoroco” Austromegabalanus psittacus (Molina, 1782) (Cirripedia, Balanidae)

2017 ◽  
Vol 43 (3) ◽  
pp. 607-615
Author(s):  
Catalina Contreras ◽  
Nicolás Luna ◽  
Enrique Dupré
Keyword(s):  
Reproductive System ◽  
Ejaculatory Duct ◽  
Mature Oocyte ◽  
Body Cavity ◽  
The Body ◽  
Thick Wall ◽  
Main Body ◽  
Simultaneous Hermaphrodite ◽  
Internal Wall ◽  
Reproductive Structures

The reproductive structures of Austromegabalanus psittacus in two periods of sexual maturation were described. This organism is a simultaneous hermaphrodite, which transfers his sperm through an intromittent organ or penis. The male reproductive system consists of testes arranged in acini distributed in a tree-like structure, two vasa deferentia that come together to form the ejaculatory duct at the base of the penis. The female reproductive system consists mainly of a saccular ovary that surrounds the main body, which is internally organized into elongated acini bags containing oogonia and previtellogenic oocytes attached to the internal wall and free vitellogenic and mature oocyte within the lumen. Remarkable differences were observed in the ovaries between organisms collected in September and October. In September, they showed a yellowish ovary with two compact structures inside, called ovigerous lamellae with fertilized oocytes, embryos in different development stages and free nauplius in the body cavity, whereas in October the ovaries have a whitish in color and present a thick wall with a milky fluid inside.

scholarly journals Doris adrianae sp. nov. (Heterobranchia; Nudibranchia; Doridina) from the Galician coasts (NW Iberian Peninsula).

2021 ◽  
pp. 1-33
Author(s):  
Victoriano Urgorri Carrasco ◽  
Marcos Pérez Se´ñarís ◽  
Guillermo Díaz Agras ◽  
María Can´dás Romero ◽  
Carola Gómez Rodríguez
Keyword(s):  
New Species ◽  
Genetic Distance ◽  
Iberian Peninsula ◽  
The Body ◽  
Skeletal Structure ◽  
Reproductive Systems ◽  
Great Consistency ◽  
Yellow Orange ◽  
Rocky Bottoms ◽  
A New Species

Abstract A new species of dorid nudibranch, Doris adrianae sp. nov. is described, from the Ría de Ferrol (NW Iberian Peninsula) on rocky bottoms, between 11 and 20 m deep, where the sponge Polymastia boletiformis (Lamarck, 1815) on which it feeds is common. The new species is oval-shaped and yellow to yellow-orange in colour, with the back covered by rounded tubercles of various sizes, reinforced by tegumentary spicules. It is characterised by numerous integumentary and fusiform calcareous spicules, mainly grouped in multispicular bundles that give it a complex and very dense skeletal structure, giving the animal great consistency without losing flexibility. In addition, it differs from other known species of the genus Doris Linnaeus, 1758 by various external and internal characters, mainly by the colouring and tubercles of the body, characters of the radula and of the digestive and reproductive systems. Doris adrianae sp. nov. also presents a marked genetic distance in the barcode fragment (cox1-5') with other species of the genus Doris.

Sign in / Sign up

Export Citation Format

Share Document