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Start Over Coverage 67-73

1. Bernstein’s analyticity theorem for quantum differences

Creator:
Sjödin, Tord
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
difference, quantum difference, quantum derivative, and power series
Language:
English
Description:
We consider real valued functions $f$ defined on a subinterval $I$ of the positive real axis and prove that if all of $f$’s quantum differences are nonnegative then $f$ has a power series representation on $I$. Further, if the quantum differences have fixed sign on $I$ then $f$ is analytic on $I$.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Demodex agrarii sp. n. (Acari: Demodecidae) from cerumen and the sebaceous glands in the ears of the striped field mouse, Apodemus agrarius (Rodentia)

Creator:
Bukva, V.
Format:
print
Type:
model:internalpart and TEXT
Subject:
Acari, Demodecidae, Demodex, taxonomy, habitat, rodents, and Apodemus agrarius
Language:
English
Description:
Demodex agrarii sp. n., an extremely long-bodied inhabitant of cerumen and the sebaceous glands in the ears of the striped field mice, Apodemus agrarius, taken in Slovakia, is described as a new species from all developmental stages.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Experimental studies on the infectivity of Anguillicola crassus third-stage larvae (Nematoda) from paratenic hosts

Creator:
Székely, Csaba
Format:
print
Type:
model:internalpart and TEXT
Subject:
Anguillicola crassus, experimental infection, larval stages, intermediate hosts, paratenic hosts, European eel, and host reaction
Language:
English
Description:
The swimbladder parasite Anguillicola crassus Kuwahara, Niimi et Itagaki, 1974 (Nematoda: Dracunculoidea) is a well-known pathogenic parasite of the Japanese and European eels. Numerous studies on the life cycle of the parasite have revealed the involvement of a copepod or an ostracod intermediate host and a fish paratenic host, in which the third-stage larvae (Lj) infective to the eel develop. The present study comprised infection experiments with the larvae of A. crassus. These experiments can be divided into three groups: (1) experimental reproduction of the parasite's life cycle via copepod intermediate hosts and fish paratenic hosts, (2) infection of another potential paratenic host with third-stage larvae of A. crassus collected from a paratenic host; (3) study of the ability of larvae damaged by paratenic hosts to infect the final host, the eel. Infection experiments have revealed that larvae which are still viable but have become encapsulated as a result of the host reaction mounted against them by cyprinid paratenic hosts (bleak, Alhumus alhumus) have lost their ability to infect the final host, the eel. At the same time, experimental infection of the eel with larvae derived from other paratenic fish hosts (river goby, Neogobius fluviati-lis: ruffe, Gymnocephalus cemua) showing no or only weak host reaction proved to be successful.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. The effect of in vitro culture conditions on the pattern of photoinhibition during acclimation of gardenia plantlets to ex vitro conditions

Creator:
Serret, M. D., Trillas, M. I., and Araus, J. L.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
carotenoids, chlorophylls, CO2, fluorescence induction, Gardenia jasminoides, irradiance, micropropagation, photosynthetic pigments, and sacharose
Language:
Multiple languages
Description:
We tested the effect of growing conditions during micropropagation on the fast kinetics of chlorophyll (Chl) fluorescence of Gardenia jasminoides Ellis plantlets during a 4-week acclimation to ex vitro. We studied whether photoautotrophic growing in vitro produced plantlets with less photoinhibition impairment during acclimation. Of the growing conditions stimulating photoautotrophy in vitro, only loose tube caps had a positive effect, whereas low sucrose or sucrose-free content in the medium and high PPFD showed a negative effect. Thus, plantlets cultured with 3 % (m/v) of sucrose were subsequently less photoinhibited throughout acclimation than those cultured with low sucrose (0.5 %) or sucrose-free media. Moreover, at the end of acclimation the former plantlets showed Fv/Fm and Fv/F0 ratios typical of unstressed ex vitro plants as well as a higher Chl content and ratio of Chls to carotenoids. Plantlets cultured at a photosynthetic photon fluence density (PPFD) of 50 µmol m-2 s-1 also showed a better performance at the end of acclimation than those cultured at a higher (110 µmol m-2 s-1) PPFD. Thus except in the case of loose-tube closure, gardenia plantlets cultured in vitro under conventional sucrose concentration and PPFD are the least photoinhibited during acclimation. Nevertheless, significant interactions between the in vitro growing factors were observed at the end of acclimation. and M. D. Serret, M. I. Trillas, J. L. Araus.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public