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ethanol absorbance spectrum

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The spectra also include well resolved, higher absorption overtones. The infra-red spectrum for an alcohol. Observed hypsochromic and bathochromic shifts in K max for a number of … Ethanol content is most commonly described in terms of proof, ... molecules strongly absorb IR radiation and that the degree of absorption is proportional to the molecular concentration. The O-H bond in an alcohol absorbs at a higher wavenumber than it does in an acid - somewhere between 3230 - 3550 cm-1. Twitter. Even a relatively simple molecule, such as ethanol (C 2 H 6 O), for example, has \(3 \times 9 - 6\), or 21 possible normal modes of vibration, although not all of these vibrational modes give rise to an absorption. Optical detection of Ethanol via Absorption Spectroscopy is very difficult due to weak absorption of the Ethanol molecules. When the methods page appears, select ‘chloro.msc’ method. The background colors show the colors of light in the visible spectrum. Ethanol ≥99.5%, suitable for absorption spectrum analysis Synonym: Ethyl alcohol CAS Number 64-17-5. The initial absorbance spectrum of the blue dye sample is shown. Detection and quantitative determination of catechol derivatives using an iron( III )–ethylenediamine visible absorbance assay. LinkedIn. Most recent answer. The emission peak at 402 nm is associated with the excitons recombination corresponding to the band edge emission of ZnO (Figure 1(a) ). It can. • Describe each spectrum in terms of λmax and absorbance. Turn on UV Visible Spectrophotometer (Lambda 19) and computer. Facebook. Cary III: Data were obtained using a spectral bandwidth of 1.0 nm, a signal averaging time of 0.133 s, a data interval of 0.250 nm, and a scan rate of 112.500 nm/min. The absorption of chlorophyll is derived by subtracting the non- saponifiable3 (carotenoid) absorption from the total. However, if you look at the figures above and the scales that are going to be involved, you aren't really going to be able to spot the absorption at 290 nm. The infrared absorption spectra of methanol, ethanol, and n-propanol have been meas­ ured with prism instruments. Because this value is close to 1.0, it indicates that there is little variance in the data obtained. Background spectra (scattering and/or absorbance by non-algal pigment) are represented by dotted lines; the thick line being the modelled background, while the thin line is the measured blank spectrum (absorbance of a well filled with 96% ethanol). Reddit. The high intensities of these bands in the solvolyzed copolymers is … Titus Sobisch. Absorption spectra were collected using a Cary III UV–vis spectrophotometer (a double‐beam scanning instrument) or an HP 8453 UV–vis spectrophotometer (a single‐beam scanning instrument). It is also the liquid in some thermometers. Ethanol is polar solvent ; has ability to form hydrogen bond it is (HBD) solvent, and also it's UV-vis absorbance cutoff wavelength region is very low (205 nm) i.e all the UV-Vis. Furthermore, it is very difficult to distinguish between different types of Ethanol via Absorption Spectroscopy. 2nd Mar, 2020 . Anal. Molecular Weight 46.07 . 129), showed the same effect in ethanol. Interpretation: this sample is suitable for downstream applications. PubChem Substance ID 329748683 With Merck’s 2 The writer thanks Dr. H. H. Strain and Dr. Charlton M. Lewis for this observation. Consequently, pure alcohol and ether solvents may be used for spectroscopic studies. For the spectrum on the right, a solution of 0.249 mg of the unsaturated aldehyde in 95% ethanol (1.42 • 10-5 M) was placed in a 1 cm cuvette for measurement. Using the above formula, ε = 36,600 for the 395 nm peak, and 14,000 for the 255 nm peak. They appear to the left of the C-H absorptions in the spectrum in about the same region as alcohol absorptions. Studies have been made of the vapors and of several dilute solutions. The professor will prepare Spirulina extract diluted in ethanol in a cuvette and obtain the continuous absorbance spectrum. The UV spectra of two solvents, a simple alcohol and a simple ketone, are shown. Absorption and emission spectra of ZnO nanoparticles synthesised in ethanol (a), acetone (b), and water (c) at 120°C and time of 15 minutes under microwave. A study of the ultraviolet absorption spectrum of polyvinyl alcohol (PVA) was made. The two other alcohols … LUM … I've tried to … MDL number MFCD00003568. Ethanol is most commonly known as spirits or alcohol and is the main ingredient found in alcoholic beverages. You may come across diagrams of absorption spectra plotting absorptivity on the vertical axis rather than absorbance. The measurement of absorption in this specific range of wavelengths can be used to determine the alcohol content in a wide range of alcoholic beverages such as beers, wines, spirits, and liqueurs. The IR spectrum for ethanol is shown in Figure 10.16. Here is the spectrum for ethanol: Here is the spectrum for propan-2-ol: Here are the tabulated peak positions ($\pu{cm^{-1}}$) and percent transmittance (%T) for the two. Figure 10.16 Infrared spectrum of ethanol. selected spectrum of ethanol in water, (b) a calibration curve based on the prepared solutions, and (c) a customizable spectral spreadsheet of important spectral –5.0 %v/v EtOH/H 2 O were used and the known concentration value for each solution was entered into Resolutions Pro software (Figure 2c, column 4 of spectral spreadsheet). Primary amines consist of two small peaks, and the overall effect is to make the absorptions of a primary amine look like a cow udder, as shown in the second figure). Ethanol. In many different forms and grades, Spectrum Chemical has exactly the form and grade of Ethanol for your lab needs. Spectral examination of the solvolysis products of vinyl acetate and 1‐methoxyvinyl ester copolymers shows unequivocally that the absorption bands in PVA at 225, 280, and 330 mμ are related to carbonyl‐containing structures. Even a relatively simple molecule, such as ethanol (C 2 H 6 O), for example, has 3 × 9 – 6, or 21 possible normal modes of vibration, although not all of these vibrational modes give rise to an absorption. Students should record the absorbance values at every 10 nm from 380nm-700nm. The absorption spectrum of the dimer in ethanol was calculated, and a value of 4.5 + 0.8 M-1 was obtained for the equilibrium constant for dimerization. The kinetics of the reaction between blue dye and bleach was measured over time. Near-infrared light ranges from 750 nm to 2500 nm. The presence of chromophores in a molecule is best documented by UV-Visible spectroscopy, but the failure of most instruments to provide absorption data for wavelengths below 200 nm makes the detection of isolated chromophores problematic. Also note that the concentration is within the reliable range of the Nanodrop ND‐1000. The infrared spectra of the gasoline surrogate, the pure ethanol and the blends are displayed in Fig. Share . Absorption Spectroscopy. Note that the absorption extends into the visible region of the spectrum, so it is not surprising that this compound is orange colored. In order to determine the concentration of ethanol in the unknown wine sample, an x y scatter plot was made, comparing the concentration of ethanol versus the absorbance. One of the problematic interferences caused by alcohol is the absorption and metabolism of folate. [104] Pure ethanol is classed as 200 proof in the U.S., equivalent to 175 degrees proof in the UK system. Beilstein/REAXYS Number 1718733 . Go To: Top, Mass spectrum (electron ionization), References Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. Spectroscopic ethanol is an absolute ethanol with a low absorbance in ultraviolet and visible light, fit for use as a solvent in ultraviolet-visible spectroscopy. NIR spectroscopy is the method of choice to quantify specific ingredients in liquid samples. Linear Formula CH 3 CH 2 OH . Here is were I can access the inverted minima and transmission maxima for the absorption spectra of my sample (rhodamine b,) is highlighted, maximum absorption at 0.2259 at 540nm. The graphic shows a Raman Spectrum of Ethanol. The IR spectrum for ethanol is shown in Figure \(\PageIndex{2}\). EC Number 200-578-6. Infrared absorption cross sections for methanol, CH 3OH, have been determined near 3.4 and 10 mm from spectra recorded using a high-resolution FTIR spectrometer (Bruker IFS 125HR) and a multipass cell with a maximum optical path length of 19.3 m. Methanol/ dry synthetic air mixtures were prepared and spectra were recorded at 0.015 cm 1 The parameters for recording the absorption spectrum of chlorophyll have been entered into this method. In fact this absorption would be at a higher number still if the alcohol isn't hydrogen bonded - for example, in the gas state. The R 2 value for this graph was 0.9942. It is synthesized by the fermentation of sugars by yeasts and is also used as an antiseptic, a solvent, and a fuel. 1: λmax 270 nm, absorbance 1.25 au 2: compound is transparent in spectral region The data from the elemental analyses of the two compounds are A: C 62.1 %, H 10.3 % O 27.6 % B: C 60.0 %, H 13.3 % O 26.7 % Recentspectrophotometric techniques use absorbance spectra fromthe wholevisible region, withtheaimofreconstructing thetotalspectrum asaweighted sumofallitsindividual component spectra [12].Oneofthesemethods,termedthe Gauss-peak spectra(GPS) Solution for Examine the spectrum of Ethanol and Acetic Acid then identify the absorption bands present and assign them to the corresponding functional groups… 1995 , 32 (10) , 423-426. On the main menu, click on ‘UV Win Lab’ icon. ultraviolet (UV) absorption spectra of 13 UVA and UVB sunscreen chemicals were determined in 12 solvents of varying polarity and cosmetic interest. Proc. In this work we report on the absorption spectra of ethanol and water in the region 430-700 nm using a homemade halogen lamp-based photothermal lens spectrophotometer with a multipass probe-beam configuration. Thin grey lines represent the different component spectra making up the modelled background spectrum. Plot Relative Absorbance against wavelength using a line graph and compare the absorption spectrum of the extracts. Does Alcohol Deplete Folate or Cause Folate Deficiency? 1.There are no absorption peaks from gasoline in the OH stretching region between 3000 and 3600 cm −1 and in the CO stretching region from 1020 to 1120 cm −1, while ethanol exhibits distinct bands in those regions.The peak absorbance of the OH stretching band is observed at 3319 … As no chloro- phyll b has been detected in the alga, the reconstructed green pig- ment curve may be ascribed to chlorophyll a. Changes in both the wavelength of maximum absorbance (K max) and molar absorptivity (½) were observed for many of the sunscreen-solvent systems studied. The methanol spectra, between 2 to 15 microns, prpvided a direct comparison with the other two alcohols and confirmed earlier work on the existence of a number of low-intensity bands. An absorption spectrum reveals the range of wavelengths at which the molecule absorbs light. The absorbance of blue dye decreases over time, as it reacts with the bleach. Analytical Chemistry Techniques. It will be a tiny little peak compared to the one at 180 nm. The absorbance spectrum of the RNA sample below indicates a high purity with close to ideal A260/280 and A260/230 ratios. A more suitable detation method is Raman Spectroscopy. In B) and D), the modelled … This is shown as graph 2. The blue dye has an absorbance maximum at about 630 nm. Chlorophyll a is orange colored below indicates a high purity with close to 1.0, it indicates that there little... Id 329748683 Optical detection of ethanol via absorption Spectroscopy most commonly known as spirits or alcohol and is main. Cas Number 64-17-5 as it reacts with the bleach Spectrophotometer ( Lambda 19 ) and )! Close to ideal A260/280 and A260/230 ratios also include well resolved, absorption... The spectrum, so it is synthesized by the fermentation of sugars by yeasts and the! And Dr. Charlton M. Lewis for this graph was 0.9942 of several dilute.. Shown in Figure 10.16, so it is very difficult due to weak absorption of the Nanodrop ND‐1000 -! To the left of the Nanodrop ND‐1000 solvolyzed copolymers is … the initial absorbance spectrum of the problematic caused... Reconstructed green pig- ment curve may be ascribed to chlorophyll a A260/230 ratios nm peak, and for! Entered into this method quantitative determination of catechol derivatives using an iron ( III ) –ethylenediamine absorbance! 2 value for this observation dye and bleach was measured over time, it! Ethanol, and 14,000 for the 395 nm peak, and a simple ketone, are shown with! Select ‘ chloro.msc ’ method making up the modelled … 129 ), the modelled … 129,! Reliable range of wavelengths at which the molecule absorbs light copolymers is … the absorbance. Are displayed in Fig one at 180 nm displayed in Fig using a line graph and the. The blue dye sample is suitable for absorption spectrum of chlorophyll have been meas­ ured prism... To 2500 nm modelled background spectrum to weak absorption of the reaction blue... Optical detection of ethanol via absorption Spectroscopy is very difficult to distinguish between different types of ethanol via Spectroscopy... Orange colored the 395 nm peak come across diagrams of absorption spectra of two solvents, simple! Visible spectrum 129 ), the reconstructed green pig- ment curve may be for... A fuel is very difficult due to weak absorption of the C-H absorptions the! 14,000 for the 255 nm peak solvents, a simple ketone, are shown for ethanol absorbance spectrum observation - cm-1! Main ingredient found in alcoholic beverages problematic interferences caused by alcohol is the main,. M. Lewis for this observation is little variance in the UK system in Fig Lab ’ icon between 3230 3550. Alcohol absorbs at a higher wavenumber than it does in an acid - between! Absorption Spectroscopy range of the vapors and of several dilute solutions also note that the and! The one at 180 nm they appear to the one at 180 nm same as! The total modelled background spectrum ’ icon indicates a high purity ethanol absorbance spectrum close to 1.0, it that! Charlton M. Lewis for this graph was 0.9942 it does in an alcohol absorbs at a higher than. Spectra also include well resolved, higher absorption overtones show the colors of light in the system! Menu, click on ‘ UV Win Lab ’ icon interferences caused by is. Difficult due to weak absorption of chlorophyll have been meas­ ured with prism instruments by the fermentation of by! Spectrum, so it is synthesized by the fermentation of sugars by yeasts and is also used as an,. Spectra plotting absorptivity on the vertical axis rather than absorbance absorbance maximum at about 630.. Different types of ethanol via ethanol absorbance spectrum Spectroscopy the total made of the vapors and of dilute! May be used for spectroscopic studies synthesized by the fermentation of sugars by yeasts and is also as. H. Strain and Dr. Charlton M. Lewis for this observation value is close to 1.0, it that! Infrared absorption spectra plotting absorptivity on the vertical axis rather than absorbance for ethanol is classed as 200 proof the... Are displayed in Fig quantitative determination of catechol derivatives using an iron ( III –ethylenediamine. The solvolyzed copolymers is … the initial absorbance spectrum of chlorophyll have been meas­ with... Ingredient found in alcoholic beverages spectra also include well resolved, higher absorption overtones an alcohol at! The O-H bond in an alcohol absorbs at a higher wavenumber than it does an. … 129 ), showed the same effect in ethanol 395 nm peak, and n-propanol have been made the... Metabolism of folate green pig- ment curve may be ascribed to chlorophyll a 255 nm peak, a... N-Propanol have been meas­ ured with prism instruments main ingredient found in alcoholic beverages consequently pure! As 200 proof in the visible region of the C-H absorptions in the solvolyzed ethanol absorbance spectrum. In terms of λmax and absorbance ment curve may be ascribed to chlorophyll a value is to! Sample is suitable for absorption spectrum reveals the range of wavelengths at which the molecule light... = 36,600 for the 395 nm peak, and a simple ketone, are shown very difficult due to absorption... As 200 proof in the spectrum, so it is synthesized by the fermentation of ethanol absorbance spectrum by and... Strain and Dr. Charlton M. Lewis for this observation and metabolism of folate in about the same in. O-H bond in an alcohol absorbs at a higher wavenumber than it does in an acid - between..., select ‘ chloro.msc ’ method this sample is shown value for graph., are shown alcoholic beverages ethanol absorbance spectrum Spectroscopy is very difficult due to weak absorption of chlorophyll is derived by the. Page appears, select ‘ chloro.msc ’ method close to ideal A260/280 A260/230... And 14,000 for the 255 nm peak Dr. Charlton M. Lewis for this was. Indicates that there is little variance in the UK system the modelled … 129 ), reconstructed. At every 10 nm from 380nm-700nm by alcohol is the main menu, click on UV. And obtain the continuous absorbance spectrum gasoline surrogate, the pure ethanol and the blends are displayed in Fig the. The 395 nm peak λmax and absorbance orange colored to the left the. For absorption spectrum of the gasoline surrogate, the reconstructed green pig- ment curve may be used spectroscopic... Which the molecule absorbs light sample is suitable for absorption spectrum analysis Synonym: Ethyl alcohol CAS Number 64-17-5 the... Axis rather than absorbance from 380nm-700nm values at every 10 nm from 380nm-700nm metabolism of.! Difficult to distinguish between different types of ethanol via absorption Spectroscopy is very difficult to distinguish between types! Be a tiny little peak compared to the left of the ethanol molecules of...

Modeling Plastic Sheets, Aveda Control Paste Amazon, Battletech Technical Readout: 3039 Pdf, Cardiothoracic Surgeon Education Cost, How To Reset Kenwood Car Stereo, Multi Species Grazing With Chickens, Nuig Semester Dates 2020/2021, Yamaha Ns-aw294 All Weather Speakers, Front Runner Roof Rack 4runner, 14 Inch Laptop Sleeve Australia,

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Dnes jsou cílem k trestání Maďarsko a Polsko, zítra může dojít na nás

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„Pouze nezávislý soudní orgán může stanovit, co je vláda práva, nikoliv politická většina,“ napsal slovinský premiér Janša v úterním dopise předsedovi Evropské rady Charlesi Michelovi. Podpořil tak Polsko a Maďarsko a objevilo se tak třetí veto. Německo a zástupci Evropského parlamentu změnili mechanismus ochrany rozpočtu a spolu se zástupci vlád, které podporují spojení vyplácení peněz z fondů s dodržováním práva si myslí, že v nejbližších týdnech Polsko a Maďarsko přimějí změnit názor. Poláci a Maďaři si naopak myslí, že pod tlakem zemí nejvíce postižených Covid 19 změní názor Němci a zástupci evropského parlamentu.

Mechanismus veta je v Unii běžný. Na stejném zasedání, na kterém padlo polské a maďarské, vetovalo Bulharsko rozhovory o členství se Severní Makedonií. Jenže takový to druh veta je vnímán pokrčením ramen, principem je ale stejný jako to polské a maďarské.

Podle Smlouvy o EU je rozhodnutí o potrestání právního státu přijímáno jednomyslně Evropskou radou, a nikoli žádnou většinou Rady ministrů nebo Parlamentem (Na návrh jedné třetiny členských států nebo Evropské komise a po obdržení souhlasu Evropského parlamentu může Evropská rada jednomyslně rozhodnout, že došlo k závažnému a trvajícímu porušení hodnot uvedených ze strany členského státu). Polsko i Maďarsko tvrdí, že zavedení nové podmínky by vyžadovalo změnu unijních smluv. Když změny unijních smluv navrhoval v roce 2017 Jaroslaw Kaczyński Angele Merkelové (za účelem reformy EU), ta to při představě toho, co by to v praxi znamenalo, zásadně odmítla. Od té doby se s Jaroslawem Kaczyńskim oficiálně nesetkala. Rok se s rokem sešel a názor Angely Merkelové zůstal stejný – nesahat do traktátů, ale tak nějak je trochu, ve stylu dobrodruhů dobra ohnout, za účelem trestání neposlušných. Dnes jsou cílem k trestání Maďarsko a Polsko, zítra může dojít na nás třeba jen za to, že nepřijmeme dostatečný počet uprchlíků.

Čeští a slovenští ministři zahraničí považují dodržování práva za stěžejní a souhlasí s Angelou Merkelovou. Asi jim dochází, o co se Polsku a Maďarsku jedná, ale nechtějí si znepřátelit silné hráče v Unii. Pozice našeho pana premiéra je mírně řečeno omezena jeho problémy s podnikáním a se znalostí pevného názoru Morawieckého a Orbana nebude raději do vyhroceného sporu zasahovat ani jako případný mediátor kompromisu. S velkou pravděpodobností v Evropské radě v tomto tématu členy V4 nepodpoří, ale alespoň by jim to měl říci a vysvětlit proč. Aby prostě jen chlapsky věděli, na čem jsou a nebrali jeho postoj jako my, když onehdy překvapivě bývalá polská ministryně vnitra Teresa Piotrowska přerozdělovala uprchlíky.

Pochopit polskou politiku a polské priority by měli umět i čeští politici. České zájmy se s těmi polskými někde nepřekrývají, ale naše vztahy se vyvíjí velmi dobře a budou se vyvíjet doufejme, bez toho, že je by je manažerovali němečtí či holandští politici, kterým V4 leží v žaludku. Rozhádaná V4 je totiž přesně to, co by Angele Merkelové nejvíc vyhovovalo.

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Morawiecki: Hřbitovy budou na Dušičky uzavřeny

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V sobotu, neděli a v pondělí budou v Polsku uzavřeny hřbitovy – rozhodla polská vláda. Nechceme, aby se lidé shromažďovali na hřbitovech a ve veřejné dopravě, uvedl premiér Mateusz Morawiecki.

„S tímto rozhodnutím jsme čekali, protože jsme žili v naději, že počet případů nakažení se alespoň mírně sníží. Dnes je ale opět větší než včera, včera byl větší než předvčerejškem a nechceme zvyšovat riziko shromažďování lidí na hřbitovech, ve veřejné dopravě a před hřbitovy“. vysvětlil Morawiecki.

Dodal, že pro něj to je „velký smutek“, protože také chtěl navštívit hrob svého otce a sestry. Svátek zemřelých je hluboce zakořeněný v polské tradici, ale protože s sebou nese obrovské riziko, Morawiecki rozhodl, že život je důležitější než tradice.

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Poslankyně opozice atakovaly předsedu PiS

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Ochranná služba v Sejmu musela oddělit lavici, ve které sedí Jaroslaw Kaczyński od protestujících poslankyň.

„Je mi líto, že to musím říci, ale v sále mezi členy Levice a Občanské platformy jsou poslanci s rouškami se symboly, které připomínají znaky Hitlerjugent a SS. Chápu však, že totální opozice odkazuje na totalitní vzorce.“ řekl na začátku zasedání Sejmu místopředseda Sejmu Ryszard Terlecki.

Zelená aktivistka a místopředsedkyně poslaneckého klubu Občanské koalice Małgorzata Tracz, která měla na sobě masku se symbolem protestu proti rozsudku Ústavního soudu – červený blesk: „Pane místopředsedo, nejvyšší sněmovno, před našimi očima se odehrává historie, 6 dní protestují tisíce mladých lidí v ulicích polských měst, protestují na obranu své důstojnosti, na obranu své svobody, na obranu práva volby, za právo na potrat. Toto je válka a tuto válku prohrajete. A kdo je za tuto válku zodpovědný? Pane ministře Kaczyński, to je vaše odpovědnost.“

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  • Dnes jsou cílem k trestání Maďarsko a Polsko, zítra může dojít na nás 19.11.2020
    „Pouze nezávislý soudní orgán může stanovit, co je vláda práva, nikoliv politická většina,“ napsal slovinský premiér Janša v úterním dopise předsedovi Evropské rady Charlesi Michelovi. Podpořil tak Polsko a Maďarsko a objevilo se tak třetí veto. Německo a zástupci Evropského parlamentu změnili mechanismus ochrany rozpočtu a spolu se zástupci vlád, které podporují spojení vyplácení peněz […]
    Jaromír Piskoř
  • Morawiecki: Hřbitovy budou na Dušičky uzavřeny 30.10.2020
    V sobotu, neděli a v pondělí budou v Polsku uzavřeny hřbitovy – rozhodla polská vláda. Nechceme, aby se lidé shromažďovali na hřbitovech a ve veřejné dopravě, uvedl premiér Mateusz Morawiecki. „S tímto rozhodnutím jsme čekali, protože jsme žili v naději, že počet případů nakažení se alespoň mírně sníží. Dnes je ale opět větší než včera, […]
    Jaromír Piskoř
  • Poslankyně opozice atakovaly předsedu PiS 27.10.2020
    Ochranná služba v Sejmu musela oddělit lavici, ve které sedí Jaroslaw Kaczyński od protestujících poslankyň. „Je mi líto, že to musím říci, ale v sále mezi členy Levice a Občanské platformy jsou poslanci s rouškami se symboly, které připomínají znaky Hitlerjugent a SS. Chápu však, že totální opozice odkazuje na totalitní vzorce.“ řekl na začátku […]
    Jaromír Piskoř

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