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30892. Two species of philometrid nematodes (Philometridae) from marine fishes off Japan, including Philometroides branchiostegi sp. n. from Branchiostegus japonicus (Malacanthidae)
- Creator:
- Moravec, František, Nagasawa, Kazuya, and Nohara, Kenji
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- parasitic nematode, Philometra, Philometroides, marine fish, Branchiostegus, Acanthogobius, Pterogobius, Sea of Japan, and Japan
- Language:
- English
- Description:
- Gravid females of two species of philometrid nematodes (Philometridae) were collected from marine perciform fishes in Japanese waters, mainly from the southern Sea of Japan. Based on light microscopy and scanning electron microscopy examinations, the previously described but poorly known species Philometra cryptocentri Yamaguti, 1961 is redescribed from specimens recovered from the abdominal cavity of Acanthogobius flavimanus (Temminck et Schlegel), Pterogobius elapoides (Günther) and P. zonoleucus Jordan et Snyder (all Gobiidae) (all new host records); the number (14) and arrangement of cephalic papillae in this species are described for the first time. The new species, Philometroides branchiostegi sp. n. from head tissues of Branchiostegus japonicus (Houttuyn) (Malacanthidae), based on a single specimen, is mainly characterized by the embossment of the entire body except for the cephalic end, presence of four submedian pairs of large cephalic papillae of external circle and two small lateral single papillae of internal circle, pair of large papilla-like caudal projections, the oesophagus with a distinct anterior inflation, by a markedly small body (length about 18 mm) and the larvae 306-465 µm long.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30893. Two species of Rhabdochona (Nematoda: Rhabdochonidae) from the cyprinid fish Luciobarbus kersin (Heckel) in northern Iraq, including R. (Globochona) kurdistanensis sp. n.
- Creator:
- Moravec, František, Bilal, Samir J., and Abdullah, Shamall M. A.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Parasitic nematode, Rhabdochona, freshwater fish, Luciobarbus, and Iraq
- Language:
- English
- Description:
- A new nematode species, Rhabdochona (Globochona) kurdistanensis sp. n. (Rhabdochonidae), is decribed based on specimens collected from the intestine of the barbel Luciobarbus kersin (Heckel) (Cyprinidae) in the Greater Zab (type locality) and the Lesser Zab Rivers, Tigris River basin, Kurdistan Region, northern Iraq. It is mainly characterized by a prostom with 8 anterior teeth, the presence of basal prostomal teeth, bifurcated deirids, length ratio of the muscular and glandular portions of oesophagus (1:14.4-17.8), conspicuously short left spicule (180-204 µm), arrangement of genital papillae, nonfilamented eggs, and by having cuticular ornamentations on the tail tip (2 lateral denticular outgrowths in female and numerous fine spines in male). Description of a gravid female of Rhabdochona (Rhabdochona) sp. with 14 anterior prostomal teeth and filamented eggs, recorded from L. kersin of the Greater Zab River, is also provided. R. kurdistanensis sp. n. is the fifth valid species of Rhabdochona Railliet, 1916 and the only representative of the subgenus Globochona Moravec, 1972 recorded from Iraq.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30894. Two types of high inductive electromagnetic stimulation and their different effects on endothelial cells
- Creator:
- Průcha, J. , Skopalik, J. , Socha, V., Hanáková, L., Knopfová, L. , and Hána, K.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- low frequency-electromagnetic fields, induced electric currents, neoangiogenesis, and endothelial cells
- Language:
- English
- Description:
- Effects of low-frequency electromagnetic fields (LF EMF) on the activation of different tissue recovery processes have not yet been fully understood. The detailed quantification of LF EMF effects on the angiogenesis were analysed in our experiments by using cultured human and mouse endothelial cells. Two types of fields were used in the tests as follows: the LF EMF with rectangular pulses, 340-microsecond mode at a frequency of 72 Hz and peak intensity 4 mT, and the LF EMF with sinusoidal alternating waveform 5 000 Hz, amplitude-modulated by means of a special interference spectrum mode set to a frequency linear sweep from 1 to 100 Hz for 6 s and from 100 Hz to 1 Hz return also for 6 s, swing period of 12 second. Basic parameters of cultured cells measured after the LF EMF stimulus were viability and proliferation acceleration. Both types of endothelial cells (mouse and human ones) displayed significant changes in the proliferation after the application of the LF EMF under conditions of a rectangular pulse mode. Based on the results, another test of the stimulation on a more complex endothelial-fibroblast coculture model will be the future step of the investigation.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
30895. Two valued measure and some new double sequence spaces in $2$-normed spaces
- Creator:
- Das, Pratulananda, Savas, Ekrem, and Bhunia, Santanu
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- convergence, $\mu $-statistical convergence, convergence in $\mu $-density, condition (APO$_{2}$), 2-norm, 2-normed space, paranorm, paranormed space, Orlicz function, and sequence space
- Language:
- English
- Description:
- The purpose of this paper is to introduce some new generalized double difference sequence spaces using summability with respect to a two valued measure and an Orlicz function in $2$-normed spaces which have unique non-linear structure and to examine some of their properties. This approach has not been used in any context before.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
30896. Two valued measure and summability of double sequences
- Creator:
- Das, Pratulananda and Bhunia, Santanu
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- double sequences, $\mu $-statistical convergence, divergence and Cauchy criteria, convergence, divergence and Cauchy criteria in $\mu $-density, and condition (APO$_2)$
- Language:
- English
- Description:
- In this paper, following the methods of Connor \cite {connor}, we extend the idea of statistical convergence of a double sequence (studied by Muresaleen and Edely \cite {moe}) to $\mu $-statistical convergence and convergence in $\mu $-density using a two valued measure $\mu $. We also apply the same methods to extend the ideas of divergence and Cauchy criteria for double sequences. We then introduce a property of the measure $\mu $ called the (APO$_2$) condition, inspired by the (APO) condition of Connor \cite {jc}. We mainly investigate the interrelationships between the two types of convergence, divergence and Cauchy criteria and ultimately show that they become equivalent if and only if the measure $\mu $ has the condition (APO$_2$).
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
30897. Two wavelenght picosecond ranging of ground target
- Creator:
- Hamal, K., Prochazka, I., and Gaignebet, J.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- scientific research, two wavelenght experiment, and Nd YAG laser
- Language:
- Czech
- Description:
- One of the limiting factors in decreasing the systematic error of laser ranging is the influence of the atmospheric refraction. Two colour ranging may contribute useful information for more precise refraction factor modelling and calculation. We will describe two wavelength experiment using streak camera as a high resolution detector for ground target distance measurement.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
30898. Two ways of experimental infection of Ixodes ricinus ticks (Acari: Ixodidae) with spirochetes of Borrelia burgdorferi sensu lato complex
- Creator:
- Fišerová, Lenka, Černá, Kateřina, Horká, Helena, and Kopecký, Jan
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Lyme disease spirochete, Borrelia burgdorferi, Borrelia garinii, Borrelia afzelii, tick, and Ixodes ricinus
- Language:
- English
- Description:
- A previously reported procedure for the introduction of Borrelia spirochetes into tick larvae by immersion in a suspension of spirochetes was tested on Ixodes ricinus (L.) ticks and three of the most medically important European Borrelia genomic species, B. burgdorferi sensu stricto, B. garinii and B. afzelii. The procedure was compared with ''classical'' infection of nymphs by feeding on infected mice. Both methods yielded comparable results (infection rate 44-65%) with the exception of B. afzelii, which produced better results using the immersion method (44%) compared with feeding on infected mice (16%). Nymphs infected by the immersion method at the larval stage were able to transmit the infection to naïve mice as shown by serology and PCR detection of spirochetal DNA in organs. The immersion method is faster than feeding on infected mice and provides more reproducible conditions for infection. It can be exploited for studies on both pathogen transmission and Borrelia-vector interactions.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30899. Two weak points of the enhanced Indispensability argument - domain of the argument and definition of indispensability
- Creator:
- Drekalović, Vladimir
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Platonism, enhanced indispensability argument, definition of indispensability, and intuition
- Language:
- Slovak
- Description:
- The contemporary Platonists in the philosophy of mathematics argue that mathematical objects exist. One of the arguments by which they support this standpoint is the so-called Enhanced Indispensability Argument (EIA). This paper aims at pointing out the difficulties inherent to the EIA. The first is contained in the vague formulation of the Argument, which is the reason why not even an approximate scope of the set objects whose existence is stated by the Argument can be established. The second problem is reflected in the vagueness of the very term indispensability, which is essential to the Argument. The paper will remind of a recent definition of the concept of indispensability of a mathematical object, reveal its deficiency and propose an improvement of this definition. Following this, we will deal with one of the consequences of the arbitrary employment of the concept of indispensability of a mathematical theory. We will propose a definition of this concept as well, in accordance with the common intuition about it. Eventually, on the basis of these two definitions, the paper will describe the relation between these two concepts, in the attempt to clarify the conceptual apparatus of the EIA., Současní platonisté ve filozofii matematiky argumentují, že matematické objekty existují. Jedním z argumentů, které toto stanovisko podporují, je tzv. Enhanced Indispensability Argument (EIA). Cílem tohoto příspěvku je poukázat na obtíže spojené s EIA. První z nich je obsažena v vágní formulaci Argumentu, což je důvod, proč nelze stanovit ani přibližný rozsah nastavených objektů, jejichž existence je uvedena argumentem. Druhý problém se odráží v neurčitosti samotného pojmu nepostradatelnost, která je pro argument nezbytná. Příspěvek bude připomínat nedávnou definici pojmu nepostradatelnost matematického objektu, odhalit jeho nedostatek a navrhnout zlepšení této definice. Poté budeme se zabývat jedním z důsledků svévolného zaměstnávání konceptu nepostradatelnosti matematické teorie. Navrhneme také definici této koncepce v souladu se společnou intuicí. Nakonec, na základě těchto dvou definic, bude článek popsat vztah mezi těmito dvěma pojmy, ve snaze objasnit koncepční aparát EIA., and Vladimir Drekalović
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
30900. Two-fold theorem on Fréchetness of products
- Creator:
- Dolecki, Szymon and Nogura, Tsugunori
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- $\alpha_3$, $\alpha_4$, $\beta_3$, $\beta_4$, 4$ spaces, $\Phi$-space, product space, sequential space, sequentially subtransverse, strongly Fréchet, and transverse
- Language:
- English
- Description:
- A refined common generalization of known theorems (Arhangel’skii, Michael, Popov and Rančin) on the Fréchetness of products is proved. A new characterization, in terms of products, of strongly Fréchet topologies is provided.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public