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3193. Chlieb náš každodenný: maskulinita a jedlo v odbornej tlači prvej dekády 21. storočia

Creator:
Gajdoš, Adam
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
muži, jídlo, gender, stravování, odborná literatura, men, food, catering, professional literature, masculinities, cooking, 18, and 316.3
Language:
Czech
Description:
The main purpose of the paper is to ofer an overview of recent research problems and debates concerning the emergence of masculinity/masculinities through the gendered preparation and consumption of food. While it takes the shape of a systematic review of scientiic papers related to the mutual interdependence of masculinities and food -related practices in the past decade, it attempts to provide a synthetic snapshot of the ield. First of all, an inventory of dominant images of masculinity and food is outlined in order to provide a frame of reference for the subsequent discussion. Masculinity is then examined as an emergent quality of various practices of a) consumption and b) production of food in two chapters. In the first chapter, both the content and forms and attitudes in regard to masculine consumption are discussed, including speciically priorities in food choices and related health issues. In the second chapter, manly cooking as performance (as presented by the media and represented by customs) on the one hand and as a necessity (in purely male groups) on the other is brought under scrutiny., Adam Gajdoš., Obsahuje bibliografii, and Abstrakt a klíčová slova anglicky
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

3194. Chlorečnany v pitné vodě: přehlížené riziko

Creator:
Kožíšek, František
Format:
print, text, and regular print
Type:
model:article, article, Text, and TEXT
Subject:
pitná voda--chemie, kvalita vody--normy, chlornan sodný--škodlivé účinky, chlorečnany--analýza--škodlivé účinky, řízení kvality, dezinfekce, dezinficiencia--škodlivé účinky, čištění vody--metody--normy, kvalita pitné vody, dezinfekce pitné vody, and vedlejší produkty dezinfekce
Language:
Czech and English
Description:
Chlorečnany nepatří do okruhu povinně sledovaných ukazatelů pitné vody, a proto stojí na okraji zájmu výrobců pitné vody a dozorových orgánů. Přesto se tento vedlejší produkt dezinfekce může v pitné vodě za určitých okolností vyskytovat, a to i v koncentracích, které převyšují možný hygienický limit, jak ukazují výsledky několika set vzorků z jednoho kraje ČR. Vysoké koncentrace jsou nacházeny u některých malých vodovodů a jejich zdrojem je zřejmě starý nebo nesprávně skladovaný chlornan sodný používaný k dezinfekci vody., Chlorate is not included in the group of parameters for routine monitoring of drinking water quality. That is why it is neglected by both water producers and the authorities. However, this disinfection by-product may under certain conditions occur in drinking water in high concentrations exceeding the probable limit value as has been shown in a survey of hundreds of samples of drinking water in one Czech region. High concentrations were found primarily in small water supplies and the most probable source of contamination is sodium hypochlorite used for disinfection, which is either old or stored under unsuitable conditions., František Kožíšek, and Literatura
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

3195. Chloride cotransport in the membrane of earthworm body wall muscles

Creator:
Volkov, E. M., Nurullin, L. F., Nikolsky, E., Jan Krůšek, and František Vyskočil
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, žížaly, earthworms, resting membrane potential, NA+-K+-ATPase, ouabain, furosemide, chloride transporter, 14, and 612
Language:
English
Description:
The resting membrane potential (Vm) of isolated somatic longitudinal muscles of the earthworm Lumbricus terrestris was studied by glass microelectrodes. The inhibition of chloride permeability by low pH did not affect Vm of the muscle fibers in isolated somatic longitudinal muscles of the earthworm Lumbricus terrestris which was -48.7 mV (inside negative) at pH 7.3 and -49.1 at pH 5.6. On the other hand, bathing the muscles in Cl- and Na+-free solutions, or application of the chloride transporter inhibitor furosemide and Na+-K+-ATPase inhibitor ouabain depolarized the Vm by 3-5 mV. The effects of a Cl- -free solution and ouabain were not additive. This demonstrates relatively small contribution of equilibrium potential for Cl- to the resting membrane potential and electrogenic effect of Na+K+-ATPase which is dependent on the supply of Na+i ions by furosemide-sensitive and Cl-e- and Na+e-dependent electroneutral transport (most probably Na+K+Cl- cotransport)., E. M. Volkov, L. F. Nurullin, E. Nikolsky, J. Krůšek, F. Vyskočil., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3196. ChlorophylI fluorescence and photosynthetic O2 evolution in Vicia faba plants treated with methabenzthiazuron

Creator:
Vidal, D., Martinez-Guijarro, J., and Simon, E.
Format:
print
Type:
model:internalpart and TEXT
Language:
Multiple languages
Description:
Simultaneous measurements of chlorophyll (Chl) fluorescence and photosynthetic O2 evolution {P^ in leaf disks from Vicia faba (cv. Reina Blanca) leaves were doně during the first weeks of growth in order to evaluate the damage caused by methabenzthiazuron (MBT) under field conditions. The plants were treated at preemergence with two doses of MBT (0.25 .and 0,40 g m'^). Measurements were carried out at constant temperature and saturating CO2 concentration. During the first weeks after plant emergence both doses of herbicide were followed by a drop in and in some fluorescence parameters, such as Fy/Fn, and AF/Fn,' ratios, and in photochemical and non-photochemical quenching, qp and q^. At the same time, increases in minimal fluorescence (Fq and Fq') and in maximal (Fj„') and steady-state fluorescence (Fj) were aiso observed on application of saturating pulses. Fluorescence parameters gave a better indication of the damage caused to the photosynthetic systém than the measurements. The linear relationship found between OO2 and the effective quantum yield, AF/Fn,', suggests that the latter is a good measure of the quantum efficiency of photosynthesis in herbicide-treated plants. Moreover, plant tissues detoxified the herbicide and, one month after plant emergence, photosynthesis was fully recovered in herbicide-treated plants; biomass production recovered and even increased at the end of the growth period.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3197. ChlorophylI fluorescence quenching caused by inorganic carbon depletion in the green alga Scenedesmus quadricauda

Creator:
Knoppová, J., Masojídek, J., and Pokorný, J.
Format:
print
Type:
model:internalpart and TEXT
Language:
Multiple languages
Description:
The effect of inorganic (IC) depletion on fluorescence quenching was studied under laboratory conditions using the chlorococcal alga Scenedesmus quadricauda strain Greifswald/15. The absence of IC caused a decrease in photochemical quenching (^p), fluorescence yield and the photosystem 2 photochemical yield (dF/F^), and an increase of non-photochemical quenching {q^). High extemal pH (about 11), which accompanies the IC-depletion, did not háve any remarkable effect on the algae. Fluorescence parameters were reversed by a resupply of CO2. The IC-defícient algae when exposed to high irradiance appeared to be less sensitive to the photoinhibition than the algae supplied with CO2. Increased thermal dissipation of the excitation energy (non-photochemical quenching) in the absence of IC is one of the probable protective mechanisms against photoinhibitory damage.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3198. Chlorophyll a fluorescence analysis of high-yield rice (Oryza sativa L.) LYPJ during leaf senescence

Creator:
Wang, Y. W., Xu, C., Lv, C. F., Wu, M., Cai, X. J., Liu, Z. T., Song, X. M., Chen, G. X., and Lv, C. G.
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
fotosyntéza, photosynthesis, thylakoid membrane, JIP-test, natural senescence, PSII efficiency, 2, and 581
Language:
Multiple languages
Description:
Photosystem II (PSII) photochemistry was examined by chlorophyll (Chl) a fluorescence analysis in high-yield rice LYPJ flag leaves during senescence. Parameters deduced from the JIP-test showed that inhibition of the donor side of PSII was greater than that of the acceptor side in hybrid rice LYPJ. The natural senescence process was accompanied by the increased inactivation of oxygen-evolving complex (OEC) and a lower total number of active reaction centers per absorption. It indicated that the inhibition of electron transport caused by natural senescence might be caused partly by uncoupling of the OEC and/or inactivation of PSII reaction centers. Chl fluorescence parameters analyzed in this study suggested that energy dissipation was enhanced in order to protect senescent leaves from photodamage. Nevertheless, considerably reduced PSI electron transport activity was observed at the later senescence. Thus, natural senescence inhibited OEC-PSII electron transport, but also significantly limited the PSII-PSI electron flow., Y. W. Wang, C. Xu, C. F. Lv, M. Wu, X. J. Cai, Z. T. Liu, X. M. Song, G. X. Chen, C. G. Lv., and Seznam literaruty
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3199. Chlorophyll a fluorescence of typical desert plant Alhagi sparsifolia Shap. at two light levels

Creator:
Li, L., Li, X. Y., Zeng, F. J., and Lin, L. S.
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
fotosyntéza, photosynthesis, shade, quantum yield, diurnal changes, electron transport chain, photosystem II activity, 2, and 581
Language:
Multiple languages
Description:
Alhagi sparsifolia Shap. is exposed to a high-irradiance environment as the main vegetation found in the forelands of the Taklamakan Desert. We investigated chlorophyll a fluorescence emission of A. sparsifolia seedlings grown under ambient (HL) and shade (LL) conditions. Our results indicated that the fluorescence intensity in the leaves was significantly higher for LL-grown plants than that under HL. High values of the maximum quantum yield of PSII for primary photochemistry (φPo) and the quantum yield that an electron moves further than QA - (φEo) in the plants under LL conditions suggested that the electron flow from QA - (primary quinone electron acceptors of PSII) to QB (secondary quinone acceptor of PSII) or QB - was enhanced at LL compared to natural HL conditions. The efficiency/probability with which an electron from the intersystem electron carriers was transferred to reduce end electron acceptors at the PSI acceptor side and the quantum yield for the reduction of end electron acceptors at the PSI acceptor side were opposite to φPo, and φEo. Thus, we concluded that the electron transport on the donor side of PSII was blocked under LL conditions, while acceptor side was inhibited at the HL conditions. The PSII activity of electron transport in the plants grown in shade was enhanced, while the energy transport from PSII to PSI was blocked compared to the plants grown at HL conditions. Furthermore, PSII activity under HL was seriously affected in midday, while the plants grown in shade enhanced their energy transport., L. Li, X. Y. Li, F. J. Zeng, L. S. Lin., and Seznam literatury
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3200. Chlorophyll a fluorescence signatures of nitrogen deficient barley leaves

Creator:
Hák, R., Rinderle-Zimmer, U., Lichtenthaler, H. K., and Nárt, L.
Format:
print
Type:
model:internalpart and TEXT
Language:
Multiple languages
Description:
Primary leaves of barley (Hordeum vulgare L.) plants, growing either in complete (H) oř nitrogen deficient nutrítion (H-N), were subjected to complex chlorophyll (Chl) a fluorescence measurement after an 8 or 14 d cultivation period. Ilie fluorescence spectra of H-N plants exhibited a higher ratio of the two maxima F690/F73S, caused predominantly by drastic decrease in Chl content. The ratio of Chl to carotenoids (a+b/x+c) decreased considerably in H-N leaves. In špite of high Rfd values (ratio of fluorescence decrease) in H-N leaves, indicating high efficiency of photochemical energy conversion, quenching analysis of H-N leaves showed a significantly higher coefiicient of non-photochemicď quenching, qjsip (i.e. higher proportion of heat loss). Fast fluorescence kinetics indicated slower reoxidation of primáty quencher (Q^) in H-N leaves.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

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