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Start Over Coverage 111-117

1. Effect of triacontanol in flooded Erythrina variegata seedlings. 1. Changes in growth, photosynthetic pigments and biomass productivity

Creator:
Muthuchelian, K., Murugan, C., Harigovindan, R., Nedunchezhian, N., and Kulandaveilu, G.
Format:
print
Type:
model:internalpart and TEXT
Subject:
carotenoids, specific leaf mass, saccharides, relative growth rate, proteins, plant height, leaf area index, leaf area, and chlorophyll
Language:
Multiple languages
Description:
Seedlings of Erythrina variegata Lam. exposed to flooding for 10 d showed significant reduction in height, growth rates (leaf area in plant, leaf area index, relative growth rate, and specific leaf mass), biomass, chlorophyli (Chl) and carotenoid contents, and thylakoid membrane organization. Application of triacontanol partially compensated these effects and promoted height, biomass and Chl content. Starch and sugar contents were significantly higher in leaves of flooded seedlings.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Experimental study of rock ruptures' shear strength anisotropy

Creator:
Proisl, Tomáš and Melichar, Rostislav
Format:
počítač and online zdroj
Type:
model:article and TEXT
Subject:
shear strength, anisotropy, joints, and faults
Language:
English
Description:
Joints significantly reduce rock cohesion compared to unfractured rock, but the question is what effect the possible anisotropy of the shear strength of different types of rupture has on possible subsequent failure. Both natural samples of granodiorite with natural joints and fault surfaces and gypsum models have been tested on the Matest A129 Rock shear box apparatus. The shear strength of preexisting ruptures was measured under a fixed normal stress component. The anisotropy of the shear strength of the joints and fault surfaces reached more than 60 % of maximum strength, which is a very important value for solving structural loads. The shear strength was analyzed with polar plots. The pattern of the real joints typically showed a teardrop shape with one peak of strength in a certain direction and a minimum in the opposite direction. On the contrary, striated fault surfaces are characterized by two axial directions of minimal shear strength, i.e., longitudinal and transverse, and by two axial oblique directions with maximal shear strength, so the strength distribution in the polar graph has a four-cornered shape. The study showed that the anisotropy of the shear strength of various types of ruptures is their important feature.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Four species of digcneans, including Allocreadium patagonicum sp. n. (Allocreadiidae), from freshwater fishes of Patagonia, Argentina

Creator:
Shimazu, Takeshi, Urawa, Shigehiko, and O. Coria, Claudio
Format:
print
Type:
model:internalpart and TEXT
Subject:
Digenea, Allocreadium patagonicum, freshwater fishes, Patagonia, and Argentina
Language:
English
Description:
Four species of adult digeneans arc reported from freshwater fishes of two lakes in Neuquén, Patagonia, Argentina. Allocreadium patagonicum sp. n. (Allocreadiidae) is described from the intestine of Percichthys colhuapiensis MacDonagh and Percichthys trucha (Cuvier et Valenciennes) (Percichthyidae) from Lago Aluminé. Three species rcdescribed are: Acanthostomoides apophalliformis Szidat, 1956 (Acanthostomidac) from the intestine of P. colhuapiensis and P. trucha from Lago Aluminé and of Salmo trutta (Linnaeus) (Salmonidae) from Lapo Muechulafquén; Deropegus patagonicus (Szidat, 1956) comb. n. (= Genarches patagonicus Szidat, 1956) (Derogenidae) from the stomach of P. colhuapiensis, P. trucha, Oncorhynchus mykiss (Walbaum) (Salmonidae) and Salvelinus fontinalis (Mitchill) (Salmonidae) from Lago Aluminé and of S. trutta from Lago l luechulafquén; and Austrocreadium papilliferum Szidat, 1956 from the intestine of P. trucha from Lago Aluminé. The genus Polylekithum Arnold, 1934 is considered a synonym of the genus Allocreadium Looss, 1900. The genus Austrocreadium Szidat, 1956 is removed to the family Homalomelridae.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5. On R-conjugate-permutability of sylow subgroups

Creator:
Zhao, Xianhe and Chen, Ruifang
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
mathematics, permutabilita, R-conjugate-permutable subgroup, nilpotent group, quasinilpotent group, Sylow subgroup, 13, and 51
Language:
English
Description:
A subgroup H of a finite group G is said to be conjugate-permutable if HHg = HgH for all g\in G. More generaly, if we limit the element g to a subgroup R of G, then we say that the subgroup H is R-conjugate-permutable. By means of the R-conjugatepermutable subgroups, we investigate the relationship between the nilpotence of G and the R-conjugate-permutability of the Sylow subgroups of A and B under the condition that G = AB, where A and B are subgroups of G. Some results known in the literature are improved and generalized in the paper., Xianhe Zhao, Ruifang Chen., and Obsahuje seznam literatury
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

6. Role of the posterior vacuole in Spraguea lophii (Microsporidia) spore hatching

Creator:
Findley, Ann M., Weidner, Earl H., Carman, Kevin R., Xu, Zhimin, and Godbar, J. Samuel
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
catalase, peroxisomal vacuole, and microsporidian spore extrusion apparatus
Language:
English
Description:
Microsporidia constitute a large group of obligate intracellular protozoan parasites that inject themselves into host cells via the extrusion apparatus of the infective spore stage. Although the injection process is poorly understood, its energy source is thought to reside in the posterior vacuole that swells significantly during spore firing. Here we report the presence and localisation of the key peroxisomal enzymes catalase and acyl-CoA oxidase (ACOX) within the posterior vacuole of Spraguea lophii (Doflein, 1898) spores. Western blot analyses show that these enzymes discharge out of the spore and end up in the medium external to the extruded sporoplasms. The presence of a catalase enzyme system in the Microsporidia was first made evident by the detection of significant levels of molecular oxygen in the medium containing discharging spores in the presence of hydrogen peroxide. Catalase was visualised in inactive, activated, and discharged spores using alkaline diaminobenzidine (DAB) on glutaraldehyde-fixed cells. The position of these enzymes within the extrusion apparatus before and during spore discharge support the Lom and Vávra model that postulates discharge occurs by an eversion process. In addition to these enzymes, spores of S. lophii contain another characteristic peroxisomal component, the very long chain fatty acid (VLCFA) nervonic acid. A sizeable decrease in nervonic acid levels occurs during and after spore discharge. These data indicate that nervonic acid is discharged from the spore into the external medium during firing along with the catalase and ACOX enzymes.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public