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15022. Chigger mites (Acari: Trombiculidae) new to the fauna of Cuba, with the description of two new species
- Creator:
- Daniel, Milan and Stekol'nikov, Alexandr A.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Acari, chiggers, Hyponeocula monocoxalae, Perates nudosetosus, taxonomy, parasites, Cuba 1960, Parasecia manueli (Brennan et Jones, 1960), Beamerella acutascuta Brennan, 1958, and and Blankaartia sinnamaryi (Floch)
- Language:
- English
- Description:
- Two new species of chigger mites, Hyponeocula monocoxalae sp. n. from bats and reptiles, and Perates nudosetosus sp. n. from bats, are described. The first finding of larvae of Tectumpilosum negreai Feider, 1983 in nature is reported from a bat collected at the type locality, and the description of this species is emended. Four species, Perates monops (Brennan et Jones, 1960), Parasecia manueli (Brennan et Jones, 1960), Beamerella acutascuta Brennan, 1958, and Blankaartia sinnamaryi (Floch et Fauran, 1956), are recorded for the first time in Cuba and on new host species.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
15023. Chigger mites (Acarina: Leeuwenhoekiidae) from Cuba
- Creator:
- de la Cruz, J. and Daniel, M.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Acarina, chigger mites, Leeuwenhoekiidae, bats, and Cuba
- Language:
- English
- Description:
- The present paper comprises a systematic survey of the chigger mites (Acarina: Leeuwenhoekiidae) collected from bats and bat guano in Cuban caves in 1965-1985. Wagenaaria similis is recorded for the first time in Cuba. The first hosts known for Ischnothrombium diploctenum are noted. Antrohoekia inexpectala, g.n., sp. n., a parasite of bats, is described.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
15024. Chigger mites of the genus Eutrombicula Ewing, 1938 (Acari: Trombiculidae) from Cuba, with the description of three new species
- Creator:
- Daniel, Milan and Stekol'nikov, Alexandr A.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- English
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
15025. Children left behind: self-confidence of pupils in competitive environments
- Creator:
- Federičová, Miroslava, Pertold, Filip, and Smith, Michael L.
- Publisher:
- CERGE-EI
- Format:
- electronic, bez média, svazek, and 30 stran : ilustrace, tabulky.
- Type:
- model:monograph and TEXT
- Subject:
- Výchova a vzdělávání, 21. století, vzdělávání, hodnocení žáků, chlapci a dívky, přijímací zkoušky, gymnázia, gender, education, evaluation of school children, boys and girls, entrance examinations, high schools, Česko, Czechia, 37.0, 37.091.26/.27, 316.346.2-053.6, 37.091.212.2, 373.54, 316.66-055.1/.3, (437.3), (047.31), 22, and 37
- Language:
- English and Czech
- Description:
- Miroslava Federičová, Filip Pertold, Michael L. Smith., Obsahuje bibliografii a bibliografické odkazy, and České a anglické resumé
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
15026. Children's own time use and its effect on skill formation
- Creator:
- Borga, Liyousew Gebremedhin
- Publisher:
- CERGE-EI
- Format:
- electronic, svazek, and 59 stran
- Type:
- model:monograph and TEXT
- Subject:
- Vývojová psychologie. Individuální psychologie, děti, vývoj dítěte, psychologické aspekty, volný čas, dětská práce, children, child development, psychological aspects, leisure, child labor, Etiopie, Vietnam, Indie, Ethiopia, India, 316.346.32-053.2, 159.922.72, 379.8, 331-053.2, (63), (597), (540), (047.31), 17, and 159.92
- Language:
- English and Czech
- Description:
- Liyousew Gebremedhin Borga., Obsahuje bibliografii a bibliografické odkazy, and Český a anglický abstrakt
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
15027. Chill injury at alternating temperatures in Orchesella cincta (Collembola: Entomobryidae) and Pyrrhocoris apterus (Heteroptera: Pyrrhocoridae)
- Creator:
- Hanč, Zdeněk and Nedvěd, Oldřich
- Format:
- print, text, and regular print
- Type:
- article, bibliography, conference publication, model:article, and TEXT
- Subject:
- Third European Workshop of Invertebrate Ecophysiology (1998 : Birmingham, Česko), zoologie, fyziologie živočichů, ekofyziologie, hmyz, Collembola, Orchesella cincta, ploštice, Pyrrhocoris apterus, přežívání, mortalita, teplotní stresy, mráz, 591.5, 061.3, and 595.2/.7
- Language:
- English
- Description:
- Survival and Lt50 after exposures at constant low temperature were compared to the values obtained at alternating temperatures in two active (summer acclimated) temperate terrestrial arthropods. The experimental regimes used interruptions - daily transfers from the lower temperature to various higher temperatures for two hours or to one high temperature for Various durations. In both species the alternating conditions improved survival, implying reparation of the chill injury. In the collembolan Orchesella cincta, there was a maximum Lt50 when the higher exposure temperature was equal to the temperature of rearing (19°C). In the bug Pyrrhocoris apterus, Lt50 increased strongly with increasing higher temperature from 0 to 15°C, and was subsequently constant over the entire physiological range suitable for development (to 35°C). Exposure at 0°C was harmful if continuously applied, but survival increased, relative to a constant exposure at -5°C, if the temperature alternated between -5 and 0°C., Zdeněk Hanč, Oldřich Nedvěd, and Lit
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
15028. Chill-induced inhibition of photosynthesis was alleviated by 24-epibrassinolide pretreatment in cucumber during chilling and subsequent recovery
- Creator:
- Hu, W. H., Wu, Y., Zeng, J. Z., He, L., and Zeng, Q. M.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- botanika, botany, antioxidant enzymes, brassinosteroids, chlorophyll fluorescence, cfhilling stress, Cucumis sativau L., photosynthesis, and reactive oxygen species
- Language:
- Multiple languages
- Description:
- To investigate whether brassinosteroids (BRs) could be used to alleviate chill-induced inhibition of photosynthesis in cucumber (Cucumis sativus L) during chilling and subsequent recovery, the effects of exogenously applied 24-epibrassinolide (EBR) on gas exchange, chlorophyll fluorescence parameters, and antioxidant enzyme activity were studied. Cucumber plants were exposed to chilling under low light (12/8°C and 100 μmol m-2 s-1 PPFD) for 3 days and then recovered under normal temperature and high irradiance (28/18°C and 600 μmol m-2 s-1 PPFD) for 6 days. Chilling significantly decreased the net photosynthetic rate (PN) and stomatal conductance (g s), and increased rate of O2 .- formation and H2O2 and malondialdehyde (MDA) content in cucumber leaves, but did not influence the optimal quantum yield of PSII (Fv/Fm). Chilling also decreased the effective quantum yield of PSII photochemistry (ΦPSII) and photochemical quenching (qP), but induced an increase in nonphotochemical quenching (NPQ), and the activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX). High irradiance (600 μmol m-2 s-1) further aggravated the decrease in PN, gs, ΦPSII and qP, and enhanced the increase in reactive oxygen species (ROS) generation and accumulation in the first day of recovery after chilling. However, high irradiance induced a sharp decrease in Fv/Fm and NPQ, as well as the activities of SOD and APX on the first day of recovery. EBR pretreatment significantly alleviated chill-induced inhibition of photosynthesis during chilling stress and subsequent recovery period, which was mainly due to significant increases in gs, ΦPSII, qP and NPQ. EBR pretreatment also reduced ROS generation and accumulation, and increased the activities of SOD and APX during chilling and subsequent recovery. Those results suggest that EBR pretreatment alleviates the chill reduction in photosynthesis and accelerated the recovery rate mainly by increasing of the stomatal conductance, the efficiency of utilization and dissipation of leaf absorbed light, and the activity of the ROS scavenging system during chilling and subsequent recovery period. and W. H. Hu ... [et al.].
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
15029. Chilling stress and chilling tolerance of sweet potato as sensed by chlorophyll fluorescence
- Creator:
- Lin, K. H., Hwang, W. C., and Lo, H. F.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- cultivar differences, Ipomoea, photosystem 2, and quantum yield
- Language:
- Multiple languages
- Description:
- We studied changes in the chlorophyll (Chl) fluorescence components in chilling-stressed sweet potato (Ipomoea batatas L. Lam) cv. Tainung 57 (TN57, chilling-tolerant) and cv. Tainung 66 (TN66, chilling-susceptible). Plants under 12-h photoperiod and 400 µmol m-2 s-1 irradiance at 24/20 °C (day/night) were treated by a 5-d chilling period at 7/7 °C. Compared to TN66, TN57 exhibited a significantly greater basic Chl fluorescence (F0), maximum fluorescence (Fm), maximum fluorescence yield during actinic irradiation (Fm' ), and the quantum efficiency of electron transport through photosystem 2, PS2 (ΦPS2). Chilling stress resulted in decrease in the potential efficiency of PS2 (Fv/Fm), ΦPS2, non-photochemical fluorescence quenching (NPQ), non-photochemical quenching (qN), and the occurrence of chilling injury in TN66. Chilling increased the likelihood of photoinhibition, characterized by a decline in the Chl fluorescence of both cultivars, and photoinhibition during low temperature stress generally occurred more rapidly in TN66. and K. H. Lin, W. C. Hwang, H. F. Lo.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
15030. Chilling tolerance and early vigour-related characteristics evaluated in two Miscanthus genotypes
- Creator:
- Fonteyne, S., Lootens, P., Muylle, H., van den Ende, W., De Swaef, T., Reheul, D., and Roldan-Ruiz, I.
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- photosynthesis, bioenergy crop, chlorophyll fluorescence, cold tolerance, leaf growth analysis, low temperature stress, 2, and 581
- Language:
- Multiple languages
- Description:
- A long growing season, mediated by the ability to grow at low temperatures early in the season, can result in higher yields in biomass of crop Miscanthus. In this paper, the chilling tolerance of two highly productive Miscanthus genotypes, the widely planted Miscanthus × giganteus and the Miscanthus sinensis genotype ‘Goliath’, was studied. Measurements in the field as well as under controlled conditions were combined with the main purpose to create basic comparison tools in order to investigate chilling tolerance in Miscanthus in relation to its field performance. Under field conditions, M. × giganteus was higher yielding and had a faster growth rate early in the growing season. Correspondingly, M. × giganteus displayed a less drastic reduction of the leaf elongation rate and of net photosynthesis under continuous chilling stress conditions in the growth chamber. This was accompanied by higher photochemical quenching and lower nonphotochemical quenching in M. × giganteus than that in M. sinensis ‘Goliath’ when exposed to chilling temperatures. No evidence of impaired stomatal conductance or increased use of alternative electron sinks was observed under chilling stress. Soluble sugar content markedly increased in both genotypes when grown at 12°C compared to 20°C. The concentration of raffinose showed the largest relative increase at 12°C, possibly serving as a protection against chilling stress. Overall, both genotypes showed high chilling tolerance for C4 plants, but M. × giganteus performed better than M. sinensis ‘Goliath’. This was not due to its capacity to resume growth earlier in the season but rather due to a higher growth rate and higher photosynthetic efficiency at low temperatures., S. Fonteyne, P. Lootens, H. Muylle, W. van den Ende, T. de Swaef, D. Reheul, I. Roldan-Ruiz., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public