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852. A new species of the rare endoparasitic copepod Entobius (Copepoda: Entobiidae) from Mexico with a key to the species of the genus
- Creator:
- Suárez-Morales, Eduardo and Carrera-Parra, Luis F.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- symbiotic copepods, parasitic crustaceans, invertebrate taxonomy, benthic polychaetes, and endoparasites
- Language:
- English
- Description:
- In a study of the benthic polychaete fauna of the southern Gulf of Mexico and the Caribbean Sea, several specimens of the terebellid polychaete Scionides reticulata (Ehlers) were found to host endoparasitic copepods that represent an undescribed species of the rare cyclopoid genus Entobius Dogiel, 1948. The new species, E. scionides sp. n., can be distinguished from its congeners by a combination of characters including a genital region without constrictions, three-segmented antennules, a reduced antenna with a blunt terminal process, reduced ornamentation of endopods of legs 1-4 and its relatively small size (2.3-2.7 mm). It is the smallest species of the genus. Comments on immature females are also provided, but males of this species remain unknown. It has a high prevalence (53%) in populations of the terebellid S. reticulata in the southern Gulf of Mexico, but it is absent from the Caribbean. This is the first occurrence of this copepod genus in the Americas. The finding of the new species of Entobius in S. reticulata confirms the strict specificity of most members of the genus and expands the host range of this copepod genus. A key for the identification of the species of Entobius is provided.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
853. A new trematode species Neoplagioporus kajika sp. n. (Digenea: Opecoelidae), parasitic in the Japanese fluvial sculpin, Cottus pollux (Osteichthyes: Scorpaeniformes: Cottidae), from Japan
- Creator:
- Urabe, Misako and Higa, Eriko
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Digenea, Neoplagioporus kajika, adult, freshwater sculpin, Cottus pollux, and Japan
- Language:
- English
- Description:
- The adult morphology is described and illustrated of Neoplagioporus kajika sp. n. (Digenea: Opecoelidae) found in the Japanese fluvial sculpin Cottus pollux Günther (Osteichthyes: Scorpaeniformes: Cottidae) collected in the Naka River at Terase Bridge, Narutake, Nakagawa Town, Fukuoka Prefecture, Kyushu, Japan. This new species is characterized by that the body shape is oval, that the intestinal caeca end posteriorly at the middle level of the testicular region, that the ovary is trilobed, and that the vitelline follicles are distributed between the pharyngeal level and usually the posterior end of body and fill up the lateral fields of body. The new species is different from three hitherto known Neoplagioporus species, N. zacconis (Yamaguti, 1934) Shimazu, 1990 (type species), N. ayu (Takahashi, 1928) Shimazu, 1990, and N. elongatus (Goto et Ozaki, 1930) Shimazu, 1990, in a combination of these characteristics. The new species is considered mainly infective to C. pollux in the river.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
854. A new type of orthogonality for normed planes
- Creator:
- Martini, Horst and Spirova, Margarita
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- chordal orthogonality, Feuerbach circle, inner product space, James orthogonality, Minkowski plane, normed linear space, normed plane, orthocentricity, and Wallace line
- Language:
- English
- Description:
- In this paper we introduce a new type of orthogonality for real normed planes which coincides with usual orthogonality in the Euclidean situation. With the help of this type of orthogonality we derive several characterizations of the Euclidean plane among all normed planes, all of them yielding also characteristic properties of inner product spaces among real normed linear spaces of dimensions $d\geq 3$.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
855. A new viewpoint to understand the response of leaf dark respiration to elevated CO2 concentration
- Creator:
- Qiao, Y.-Z., Zhang, Y.-B., Wang, K.-Y., Wang, Y.-P., Xu, Y., and Li, Q.-C.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- controlled environment chambers, Fargesia denudata, net photosynthetic rate, Populus cathayanna, and species differences
- Language:
- Multiple languages
- Description:
- By investigating the RD-Ca (dark respiration rate-atmospheric CO2 concentration) and PN (net photosynthetic rate)-Ca curves of bamboo (Fargesia denudata) and poplar (Populus cathayanna), we found that: (1) the minimal RD was close to ambient CO2 concentration, and the elevated or decreased atmospheric CO2 concentration enhanced the RD of both species; (2) the response curves of RD-Ca were simulated well by quadratic function. This phenomenon might be an inherent property of leaf R of F. denudata and P. cathayanna. If this was true, it implies that effect of CO2 on RD could be interpreted with the relationship of RD-Ca curves and the quadratic function. and Y.-Z. Qiao ... [et al.].
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
856. A newly developed SGB buffer greatly enhances energy transfer efficiency from phycobilisomes to photosystem II in cyanobacteria in vitro
- Creator:
- Chen, L. P., Wang, Q. X., and Ma, W. M.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- botanika, botany, energy transfer efficiency, photosystem II, phycobilisome, SGB buffer, Synechocystis sp. PCC 6803, thylakoid membrane, 2, and 58
- Language:
- Multiple languages
- Description:
- The transfer of light energy from phycobilisomes (PBS) to photosystem II (PSII) reaction centers is vital for photosynthesis in cyanobacteria and red algae. To investigate the relationship between PBS and PSII and to optimize the energy transfer efficiency from PBS to PSII, isolation of the PBS-PSII supercomplex is necessary. SPC (sucrose/phosphate/citrate) is a conventional buffer for isolating PBS-PSII supercomplex in cyanobacteria. However, the energy transfer occurring in the supercomplex is poor. Here, we developed a new buffer named SGB by adding 1M glycinebetaine and additional sucrose to SPC buffer. Compared to SPC, the newly developed SGB buffer greatly enhanced the associated populations of PBS with thylakoid membranes and PSII and further improved the energy transfer efficiency from PBS to PSII reaction centers in cyanobacteria in vitro. Therefore, we conclude that SGB is an excellent buffer for isolating the PBS-PSII supercomplex and for enhancing the energy transfer efficiency from PBS to PSII reaction centers in cyanobacteria in vitro., L. P. Chen, Q. X. Wang, W. M. Ma., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
857. A non commutative generalization of $\star$-autonomous lattices
- Creator:
- Emanovský, Petr and Rachůnek, Jiří
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- $\star$-autonomous lattice, pseudo $\star$-autonomous lattice, residuated lattice, ideal, normal ideal, and congruence
- Language:
- English
- Description:
- Pseudo $\star $-autonomous lattices are non-commutative generalizations of $\star $-autonomous lattices. It is proved that the class of pseudo $\star $-autonomous lattices is a variety of algebras which is term equivalent to the class of dualizing residuated lattices. It is shown that the kernels of congruences of pseudo $\star $-autonomous lattices can be described as their normal ideals.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
858. A non-archimedean Dugundji extension theorem
- Creator:
- Kakol, Jerzy, Kubzdela, Albert, and Śliwa, Wiesƚaw
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Dugundji extension theorem, non-archimedean space, space of continuous functions, and 0-dimensional space
- Language:
- English
- Description:
- We prove a non-archimedean Dugundji extension theorem for the spaces $C^{\ast }(X,\mathbb {K})$ of continuous bounded functions on an ultranormal space $X$ with values in a non-archimedean non-trivially valued complete field $\mathbb {K}$. Assuming that $\mathbb {K}$ is discretely valued and $Y$ is a closed subspace of $X$ we show that there exists an isometric linear extender $T\colon C^{\ast }(Y,\mathbb {K})\rightarrow C^{\ast }(X,\mathbb {K})$ if $X$ is collectionwise normal or $Y$ is Lindelöf or $\mathbb {K}$ is separable. We provide also a self contained proof of the known fact that any metrizable compact subspace $Y$ of an ultraregular space $X$ is a retract of $X$.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
859. A non-commutative generalization of $MV$-algebras
- Creator:
- Rachůnek, Jiří
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- math and $MV$-algebras
- Language:
- English
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
860. A non-linear rainfall-runoff model with a sigmoid gain factor to simulate flow frequency distribution curves for Amazon catchments
- Creator:
- Vinagre, Marco Valério A., Blanco, Claudio J. C., and Amarante Mesquita, André L.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- hydrological modeling, flow frequency distribution curves, Amazon small catchments, hydrologické modelovanie, čiara rozdelenia prietokov, and malé povodia riekyAmazonka
- Language:
- Slovak
- Description:
- The objective of this paper is to simulate flow frequency distribution curves for Amazon catchments with the aim of scaling power generation from small hydroelectric power plants. Thus, a simple nonlinear rainfall-runoff model was developed with sigmoid-variable gain factor due to the moisture status of the catchment, which depends on infiltration, and is considered a factor responsible for the nonlinearity of the rainfall-runoff process. Data for a catchment in the Amazon was used to calibrate and validate the model. The performance criteria adopted were the Nash-Sutcliffe coefficient (R²), the RMS, the Q95% frequency flow percentage error, and the mean percentage errors ranging from Q5% to Q95%.. Calibration and validation showed that the model satisfactorily simulates the flow frequency distribution curves. In order to find the shortest period of rainfall-runoff data, which is required for applying the model, a sensitivity analysis was performed whereby rainfall and runoff data was successively reduced by 1 year until a 1.5-year model application minimum period was found. This corresponds to one hydrological year plus the 6-month long ''memory''. This analysis evaluates field work in the ungauged sites of the region. and Cieľom tohto príspevku je simulácia čiar rozdelenia prietokov pre povodia rieky Amazonka pre potreby hodnotenia premeny energie v malých hydroelektrárňach. Preto bol vyvinutý jednoduchý nelineárny zrážko-odtokový model so sigmoidálne sa meniacim zdrojovým faktorom v závislosti od obsahu vody v povodí, ktorý závisí od infiltrácie a je považovaný za faktor, spôsobujúci nelinearitu zrážkoodtokových procesov. Pre kalibráciu a validizáciu modelu boli použité údaje z povodí rieky Amazonka. Použili sme tieto hodnotiace kritériá: Nashov-Sutcliffov koeficient (R²), RMS, Q95%, chyba určenia odtoku v percentách, a priemerná percentuálna chyba v rozsahu od Q5% do Q95%. Kalibrácia a validizácia ukázala, že model simuluje čiary rozdelenia prietokov uspokojivo. Aby bolo možné nájsť najkratšie obdobie pre nájdenia závislosti zrážky - odtok, ktorá je potrebná pre aplikáciu v modeli, použili sme citlivostnú analýzu tak, že údaje zrážky - odtok boli postupne redukované o jeden rok, až kým nebolo nájdené minimálne obdobie pre aplikáciu vzťahu zrážky - odtok 1,5 roka. Toto obdobie zodpovedá jednému hydrologickému roku, plus 6 mesiacov dlhá ''pamäť''. Touto analýzou boli vyhodnotené výsledky terénnych meraní v oblastiach, kde neboli k dispozícii merania odtoku.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public