Adding presentation files to git, to ensure everything is there in case personal laptop gives out...

2026-09-24 15:57:48 +02:00
1 parent 1b835d6d8a
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@@ -1,5 +1,5 @@
 % makeindex style file created by the glossaries package
-% for document '01_introduction' on 2026-9-11
+% for document '01_introduction' on 2026-9-18
 actual '?'
 encap '|'
 level '!'
@@ -16,6 +16,20 @@
 		
 	\chapter{Introduction}
 	\thispagestyle{mainbody}
+	
+	\section{Monoterpenes in the atmosphere}
+	
+	\section{Iodine in the atmosphere}
+	
+	\subsection{Iodine cycle and sources of atmospheric iodine}
+	
+	\subsection{Atmospheric chemistry of iodine}
+	
+	\section{Organic iron complexes and iodine}
+	
+	\section{Current state of research}
+	
+	\section{Relevant instrumentation}

 	
 	Iodine is the heaviest stable halogen element with atomic number \qty{53}{}. It has an average atomic weight of \qty{126.904}{\amu} and forms a semi-lustrous solid under standard conditions (here \qty{273.15}{\kelvin} and \qty{1}{\bar}, see \citet{calvert_glossary_1990}) \citep{kaiho_physical_2015}. Its melting and boiling points are \qty{114}{\degreeCelsius} and \qty{184}{\degreeCelsius}, respectively, and its vapour pressure is \qty{0.031}{\kilo\pascal} and \qty{9.17}{\kilo\pascal} at \qty{25}{\degreeCelsius} and \qty{113.6}{\degreeCelsius}, respectively \citep{kaiho_physical_2015}. The atomic radius of iodine is \qty{140}{\pico\meter} and its first ionisation energy is \qty{1015}{\kilo\joule\per\mol} \citep{kaiho_physical_2015}. Iodine is important in the enviornment: in the atmosphere, it influences the chemistry of ozone and important radical species, and it may be cause the formation of particles that may act as nuclei for aerosol or clouds \citep{saiz-lopez_atmospheric_2012}. The former is important for the capability of the atmophere to oxidise and remove species emitted to it, while the latter is important because of its effect on radiative equilibrium of Earth. 
@@ -1,5 +1,5 @@
 % makeindex style file created by the glossaries package
-% for document '02_methods' on 2026-9-17
+% for document '02_methods' on 2026-9-20
 actual '?'
 encap '|'
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@@ -37,9 +37,14 @@
 			\textbf{Data Analysis}. In this step, the data from the \gls{BTOF-CIMSa} are analysed using \emph{IGOR Pro} and \emph{Python}. Details are available in section \ref{methods: section: data analysis}.}
 	\end{enumerate}
 	
-	\section{\gls{SOAa} filter production in \gls{OFRa}}\label{methods: section: SOA filter production in OFR}
+	\section{\glsname{SOAa} filter production in \gls{OFRa}}\label{methods: section: SOA filter production in OFR}
 	
-	An overview over the setup for filter production is displayed in figure \ref{methods: fig: overview over OFR setup}. Briefly, \gls{O2f} and \gls{N2f} from the in-house gas connection at \gls{PSIa} are first mixed at controlled ratios and guided inton the flow tube of the \gls{OFRa}. Usually, $\gls{VFLOWs}_{\ce{N2}}=\qty{3.95}{\liter\per\minute}$
+	An overview over the setup for filter production is displayed in figure \ref{methods: fig: overview over OFR setup}. \Gls{O2f} and \gls{N2f} from the in-house gas connection at \gls{PSIa} are first mixed at controlled ratios and guided inton the flow tube of the \gls{OFRa}. Usually, $\gls{VFLOWs}_{\ce{N2}}=\qty{3.95}{\liter\per\minute}$ and $\gls{VFLOWs}_{\ce{O2}}^{(3)}=\qty{1.05}{\liter\per\minute}$ was set, giving a relative fraction of $\glssymbol{N2f}:\glssymbol{O2f}\approx0.79:0.21$, which is close to atmospheric comoposition. This was achieved through the \glspl{MFCa} 2 (for \gls{N2f}) and 3 (for \gls{O2f}), respectively (see also figure \ref{methods: fig: overview over OFR setup}). \Gls{MFCa} 1 was used to control the flow of \gls{N2f} through a glass bottle containing \gls{VOCa}, with a value set at $\gls{VFLOWs}_{\textnormal{VOC}}=\qty{0.04}{\liter\per\minute}$. In order to inhibit diffusion of \gls{VOCa} into the \gls{OFRa}, a plug valve (PV1) was installed on the \gls{VOCa} input line just before the \gls{OFRa}. Finally, \gls{MFCa} 4 was used to control the flow of \gls{O2f} into the \glstext{O3f} generator, where \glstext{O2f} reacted with \gls{UVa} light to produce \glstext{O3f}, as in reaction below: 
+	
+	\begin{reaction}
+	\label{methods: reac: O2 + hv -> O3}
+	\glssymbol{O2f} + ${h\nu}$ -> 2\glssymbol{O-1D.f}	
+	\end{reaction}
 	
 	\begin{figure}[h]
 		\centering
@@ -48,17 +53,44 @@
 		\label{methods: fig: overview over OFR setup}
 	\end{figure}
 	
+	For this, \gls{MFCa} 4 was set to provide a flow of $\gls{VFLOWs}_{\ce{O2}}^{(4)}=\qty{3}{\liter\per\minute}$ to the \glstext{O3f} generator. Without any additional measures, this \gls{O2f} flow is efficiently converted into \glstext{O3f} by the generator, such that concentrations in excess $\gls{CHIs}_{\ce{O3}}\approx\qty{100}{\ppm}$ are reached within the \gls{OFRa}. In order to decrease \gls{O3f} levels within the \gls{OFRa}, a pump was installed that pumped a flow of $\gls{VFLOWs}_{\textnormal{P}}\approx\qty{2.2}{\liter\per\minute}$ of generated \gls{O3f} into exhaust 2, such that steady-state concentrations of \gls{O3f} within the \gls{OFRa} were not usually in excess of $\approx\qty{70}{\ppm}$. The flow rate of the pump was adjusted using a needle valve (NV1). This was done once before the start of experiments, and the valve setting was not changed throughout experiments. Within the \gls{OFRa}, thus, the flows of \gls{VOCa} (on its \glssymbol{N2f} carrier gas), «air» (with $\glssymbol{N2f}:\glssymbol{O2f}=0.79:0.21$) and \gls{O3f} (at $\gls{VFLOWs}_{\ce{O3}}\approx\qty{0.8}{\liter\per\minute}$) converge. Here, \gls{VOCa} is oxidised by \gls{O3f} into \glspl{OVOCa} and \glspl{LVOCa}. These \glspl{LVOCa} condense into \gls{SOAa}. 
+	
+	Two lines exit the \gls{OFRa}: One that takes an air sample from within the middle of the flow tube, where the flow is nearly laminar, and another one consisting of four different outlets at the flow tubes' rear end that converge into a single outlet line. The latter line is connected to a filter holder through which a flow of product gases $\gls{VFLOWs}_{\textnormal{F}}\approx\qty{4.5}{\liter\per\minute}$ is guided into exhaust 1 --- it is here that \gls{SOAa} is collected: within the filter holder, a Nylon filter with pore size \qty{0.45}{\micro\meter} is installed, on which \gls{SOAa} is collected. The other line is guided into the \gls{SMPSa} and the \gls{O3f} analyser. Downstream of those instruments, the flow through the former line is converging again, and sucked into exhaust 2 along with excess \gls{O3f} from the pump. The \gls{SMPSa} allows for an online measurement of particle size, and is described in detail in section \ref{methods: subsec: SMPS}. Using a ball valve (BV1), the line can be opened or closed towards the \gls{O3f} analyser: if BV1 is closing the \gls{OFRa} outlet flow towards the analyser, a three-way-valve (3WV1) allows for the \gls{O3f} analyser to sample ambient air. In normal operation, BV1 is open and 3WV1 closes off the system towards the ambient. In this configuration, a flow of $\gls{VFLOWs}_{\textnormal{CPC}}\approx\qty{0.3}{\liter\per\minute}$ is guided into the \gls{SMPSa} and a flow of $\gls{VFLOWs}_{\ce{O3}}^{(A)}\approx\qty{1}{\liter\per\minute}$ flows through the \gls{O3f} analyser. 
+	
 	\subsection{Procedure}
+	\label{methods: subsec: OFR Procedure}
+	A detailed methodological procedure is available in appendix \ref{chapter: appendix: procedures}. Throughout the experiments, \gls{SMPSa} data was collected within $\approx\num{60}$ (this number varied across experiments) samples, each of which constitutes of aggragating data for \qty{180}{\second}. Briefly, the following steps need to be undertaken:
+	
+	\begin{enumerate}
+		\item{
+			All lines are checked and it is ensured that \gls{SMPSa} and \gls{O3f} analyser are ready for data logging;}
+		\item{
+			The \gls{O3f} analyser and \gls{CPCa} are switched on so that they can warm up.}
+		\item{
+			Flows are set at $\gls{VFLOWs}_{\ce{N2}}=\qty{3.95}{\liter\per\minute}$, $\gls{VFLOWs}_{\ce{O2}}^{(3)}=\qty{1.05}{\liter\per\minute}$ and $\gls{VFLOWs}_{\ce{O2}}^{(4)}=\qty{1.05}{\liter\per\minute}$. The \gls{O3f} excess pump is switched on.}
+		\item{
+			\Gls{O3f} data logging is started, filter holder is loaded with filter and attached to the system.}
+		\item{
+			Start logging \gls{SMPSa} data and turn on \gls{O3f} generator. Let the system equilibrate for \qty{45}{\minute} (for \num{15} samples)}
+		\item{
+			Just before ($\approx\qty{10}{\second}$) \num{15} samples have been recorded, open the \gls{VOCa} valve (PV1). At the onset of the next sample, set $\gls{VFLOWs}_{\textnormal{VOC}}=\qty{0.04}{\liter\per\minute}$. Let the system run for \qty{1}{\hour} (for \num{20} samples).}
+		\item{
+			When \qty{1}{\hour} has passed, and at the onset of the sample subsequent to the ones recorded in the last step, reset $\gls{VFLOWs}_{\textnormal{VOC}}=\qty{0}{\liter\per\minute}$. Within $\approx\qty{10}{\second}$, close the \gls{VOCa} valve (PV1). Let the system equilibrate for \qty{30}{\minute}. }
+	\end{enumerate}
+	
 	\subsection{Oxidation Flow Reactor}
 	\subsection{Scanning Mobility Particle Sizer}
-	\subsection{Ozone analyser and other instrumentation}
+	\label{methods: subsec: SMPS}
 	
-	The aerosol concentration is measured using a
+	The aerosol concentration is measured using a \gls{SMPSa}, which in turn consists of a \gls{DMAa} and a \gls{CPCa}, arranged in series. 
 	
 	\begin{equation}
 		m_{\textnormal{F}}=\int_{t_{\textnormal{in}}}^{t_{\textnormal{out}}}\gls{MFLOWs}\,\der{t}\approx\sum_{\textnormal{Samples}}\gls{MFLOWs}_{i}\Delta t_{i}
 	\end{equation}
 	
+	\subsection{Ozone analyser and other instrumentation}
+
+	
 	\begin{longtblr}[
 		caption = {Overview over filters and flows},
 		entry={Overview over filters and flows},
@@ -102,6 +134,15 @@
 	\section{Filter extraction and \gls{TOCa}-analysis}\label{methods: section: filter extraction and TOC analysis}
 	
 	\subsection{Preparation}
+	
+	Preparation for \gls{TOCa} measurements essentially consists in cleaning glassware required for analysis and extraction. This is rather not straightforward, and two procedures need to be distinguished: a special procedure before the campaign to obtain a standard of cleanliness, and a procedure during the campaign to retain the obtained standard.
+	
+	\subsubsection{Intial Cleaning}
+	
+	During initial cleaning, \gls{NPOCa} of glassware is tested. Glassware is considered clean if $\gls{NPOCs}<\qty{0.1}{\milli\gram\per\liter}$. 
+	
+	\subsubsection{Subsequent cleaning steps}
+	
 	\subsection{Extraction}
 	\subsection{Calibration}
 	\subsection{Measurements}
@@ -117,6 +158,7 @@
 	\label{methods: section: CWFTR Experiments}
 	
 	\subsection{Preparation}
+	
 	\subsection{Coating solution Preparation}
 	\subsection{Procedure}

@@ -15,6 +15,7 @@
 	\pagestyle{mainbody}
 		
 	\chapter{Procedures}
+	\label{chapter: appendix: procedures}
 	\thispagestyle{mainbody}
 	
 	All the procedures shown here are available on the server of the multiphase chemistry group of \gls{PSIa}, under the following paths:
@@ -193,6 +193,14 @@
 	description={oxygenated volatile organic compound}
 }

+\newglossaryentry{LVOCa}{
+	type=\acronymtype,
+	first={low-volatity organic compound (LVOC)},
+	firstplural={low-volatility organic compounds (LVOCs)},
+	name={LVOC},
+	description={low-volatility organic compound}
+}
+
 \newglossaryentry{I-OVOCa}{
 	type=\acronymtype,
 	first={iodine oxygenated volatile organic compound (I-OVOC)},
@@ -332,7 +340,7 @@

 \newglossaryentry{NPOCa}{
 	type=\acronymtype,
-	first={non-purgeable organic carbon (NPOC)},
+	first={non-purgeable organic carbon (NPOC)\glsadd{NPOCs}},
 	name={NPOC},
 	description={Non-purgeable organic carbon}
 }
@@ -351,6 +359,30 @@
 	description={Total carbon}
 }

+\newglossaryentry{MFCa}{
+	type=\acronymtype,
+	first={mass flow controller (MFC)},
+	firstplural={mass flow controllers (MFCs)},
+	name={MFC},
+	description={Mass flow controller}
+}
+
+\newglossaryentry{DMAa}{
+	type=\acronymtype,
+	first={differential mobility analyser (DMA)},
+	firstplural={differential mobility analysers (DMAs)},
+	name={DMA},
+	description={Differential mobility analyser}
+}
+
+\newglossaryentry{CPCa}{
+	type=\acronymtype,
+	first={condensation particle counter (CPC)},
+	firstplural={condensation particle counters (CPCs)},
+	name={CPC},
+	description={Condensation particle counter}
+}
+
 %% ------------------------------------------------------------------%
 %% GLOSSARY ENTRIES

@@ -368,14 +368,6 @@
 	first={hematite (iron(\toRoman{3}) oxide) (\ensuremath{\ce{Fe2O3}})}
 }

-@entry{O2f,
-	name={Molecular oxygen},
-	text={molecular oxygen},
-	formula={\ensuremath{\ce{O2}}},
-	description={},
-	sort={oxygen}
-}
-
@entry{O2-.f,
 	name={Superoxide ion radical},
 	text={superoxide ion radical},
@@ -389,7 +381,7 @@
 	name={Oxygen radical (triplet-P)},
 	text={oxygen radical (triplet-P)},
 	plural={oxygen radicals (triplet-P)},
-	formula={\ensuremath{^{\bullet}\ce{O}(^{3}\textnormal{P})}},
+	formula={\ensuremath{\ce{O}(^{3}\textnormal{P})^{\bullet}}},
 	first={oxygen radical (triplet-P)},
 	description={}
 }
@@ -398,7 +390,7 @@
 	name={Oxygen radical (singlet-D)},
 	text={oxygen radical (singlet-D)},
 	plural={oxygen radicals (singlet-D)},
-	formula={\ensuremath{^{\bullet}\ce{O}(^{1}D)}},
+	formula={\ensuremath{\ce{O}(^{1}D)^{\bullet}}},
 	first={oxygen radical (singlet-D) (\ensuremath{^{\bullet}\ce{O}(^{1}D)})},
 	description={}
 }
@@ -480,7 +472,7 @@
@entry{O2f,
 	name={Molecular oxygen},
 	text={molecular oxygen},
-	formulat={\ensuremath{\ce{O2}}},
+	formula={\ensuremath{\ce{O2}}},
 	first={molecular oxygen (\ensuremath{\ce{O2}})},
 	description={}
 }
@@ -488,7 +480,7 @@
@entry{N2f,
 	name={Molecular nitrogen},
 	text={molecular nitrogen},
-	formulat={\ensuremath{\ce{N2}}},
+	formula={\ensuremath{\ce{N2}}},
 	first={molecular nitrogen (\ensuremath{\ce{N2}})},
 	description={}
 }
@@ -67,4 +67,10 @@
 	description={Mass flow rate}
 }

+@symbol{NPOCs,
+	unit={\qty{}{\milli\gram\per\liter}},
+	name={\ensuremath{\textnormal{NPOC}}},
+	description={Non-purgeable organic carbon}
+}
+
 %% ------------------------------------------------------------------%
@@ -1,5 +1,5 @@
 % makeindex style file created by the glossaries package
-% for document 'main' on 2026-9-17
+% for document 'main' on 2026-9-18
 actual '?'
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@@ -94,7 +94,7 @@
 	
 	\modulolinenumbers[1]
 	%\linenumbers
-	%\doublespacing
+	\doublespacing
 	
 	\subfile{../chapters/01_introduction.tex}
 	\subfile{../chapters/02_methods.tex}
@@ -0,0 +1,16 @@
+\headcommand {\slideentry {0}{0}{1}{1/1}{}{0}}
+\headcommand {\beamer@framepages {1}{1}}
+\headcommand {\slideentry {0}{0}{2}{2/2}{}{0}}
+\headcommand {\beamer@framepages {2}{2}}
+\headcommand {\beamer@sectionpages {1}{2}}
+\headcommand {\beamer@subsectionpages {1}{2}}
+\headcommand {\sectionentry {1}{Introduction}{3}{Introduction}{0}}
+\headcommand {\slideentry {1}{0}{1}{3/3}{}{0}}
+\headcommand {\beamer@framepages {3}{3}}
+\headcommand {\slideentry {1}{0}{2}{4/4}{}{0}}
+\headcommand {\beamer@framepages {4}{4}}
+\headcommand {\beamer@partpages {1}{4}}
+\headcommand {\beamer@subsectionpages {3}{4}}
+\headcommand {\beamer@sectionpages {3}{4}}
+\headcommand {\beamer@documentpages {4}}
+\headcommand {\gdef \inserttotalframenumber {4}}
@@ -0,0 +1,184 @@
+% !TeX Program = lualatex
+
+\documentclass[aspectratio=169, compress, fleqn]{beamer}
+\beamertemplatenavigationsymbolsempty
+
+\usefonttheme{professionalfonts}
+\usefonttheme{serif}
+
+%\usepackage[utf8]{inputenc}
+\usepackage[english]{babel}								% Language
+\usepackage{csquotes}									% Quotation
+
+\usepackage[T1]{fontenc}
+\usepackage{fontspec}
+\usepackage{amsmath}
+%\usepackage{mathtools}
+\usepackage[colon=literal]{unicode-math}
+\setmainfont{STIX Two Text}
+\setmathfont{STIX Two Math}
+\usepackage[skip=0pt, indent=15pt]{parskip}
+\usepackage{enumitem}
+%\setlength{\columnseprule}{0.5pt}
+\setlength{\columnsep}{3em}
+\setlist{leftmargin=1cm}
+%\renewcommand\labelitem{--}
+
+%% ------------------------------------------------------------------%
+%% GRAPHICS PACKAGES
+
+% graphics package and graphics paths
+\usepackage{graphicx}
+\graphicspath{{../../graphics/}{../../config/logos/}}
+
+%% ------------------------------------------------------------------%
+%% PACKAGES
+
+%\usepackage{amsfonts}
+%\usepackage{amsmath}
+%\usepackage{amssymb}
+\usepackage{amsthm}
+%\usepackage{alphalph}
+%\usepackage[toc,page]{appendix}
+%\usepackage[affil-it]{authblk}
+\usepackage[backend=biber,
+style=authoryear,
+citestyle=authoryear,
+natbib,
+maxcitenames=1,
+maxbibnames=99,
+doi=false,
+isbn=false,
+url=false,
+eprint=false,
+giveninits=true]{biblatex}
+%\usepackage{blindtext}
+%\usepackage{commath}
+%\usepackage{dblfnote}
+%\usepackage{dirtree}
+%\usepackage{dirtytalk}
+
+%\usepackage{eso-pic}
+%\usepackage{epstopdf}
+%\epstopdfsetup{outdir=../graphics/}
+
+%\usepackage{etoolbox}
+\usepackage{fancyhdr}
+%\usepackage{float}
+%\usepackage[record=hybrid, acronym, symbols, automake, indexcrossrefs=true, autoseeindex=true, stylemods={longextra}]{glossaries-extra}
+\usepackage{graphbox}
+%\usepackage[colorlinks=true, linktoc=true, allcolors=black]{hyperref} % allcolors=black
+%\usepackage{imakeidx}
+%\usepackage{kantlipsum}
+%\usepackage{lastpage}
+%\usepackage[switch*, modulo]{lineno}
+%\usepackage{mathtools}
+\usepackage[arrows=pgf-filled, version=4]{mhchem}
+%\usepackage{multicol}
+%\usepackage{nameref}
+%\usepackage{setspace}
+\usepackage[free-standing-units=true]{siunitx}
+\usepackage{subcaption}
+%\usepackage{scrwfile}
+%\usepackage{tabularray}
+%\usepackage{tikz}
+%\usepackage{tikz-3dplot}
+\usepackage[breakable, many]{tcolorbox}
+\usepackage{tikz}
+%\usepackage[titles]{tocloft}
+%\usepackage{verbatim}
+%\usepackage{xcolor}
+
+% Chemical equations and according setup: Needs to be loaded after \usepackage{mhchem}
+\usepackage{chemmacros}
+\chemsetup{
+formula=mhchem,
+reactions/tag-open=[R,
+reactions/tag-close=]
+}
+
+\counterwithin{reaction}{section}
+\useoutertheme[subsection=false, footline=authortitle]{miniframes}
+%\usetheme{Darmstadt}
+\usecolortheme{seagull}
+
+
+% Fonts
+\setbeamerfont{frametitle}{size=\large, series=\itshape\bfseries}
+\setbeamerfont{frametitle}{size=\large, series=\itshape\bfseries}
+
+% Logo
+\addtobeamertemplate{frametitle}{}{
+	\begin{tikzpicture}[remember picture, overlay]
+		\node[anchor=north east, yshift=2pt] at (current page.north east) {\includegraphics[height=0.4cm, align=c]{PSI_Logo.pdf}\hspace*{0.15cm}
+		 \includegraphics[height=0.3cm, align=c]{iac_logo.pdf}\hspace*{0.15cm}
+		 \includegraphics[height=0.4cm, align=c]{ETH_Logo.pdf}};
+	\end{tikzpicture}}
+
+% Title Format
+\makeatletter
+\setbeamertemplate{title page}[default][left]
+\setbeamerfont{title}{size=\Large, series=\scshape, parent=structure}
+\setbeamerfont{subtitle}{size=\normalsize, series=\scshape, parent=structure}
+\setbeamerfont{author}{size=\normalsize, series=\normalfont, parent=structure}
+\setbeamertemplate{title page}{
+	\setlength\parindent{0pt}
+	
+	\insertdate{: }\usebeamerfont{subtitle}\insertsubtitle\par
+	\vspace*{0.5em}
+	\usebeamerfont{title}\inserttitle\par
+	\vspace*{1em}
+	\usebeamerfont{author}\insertauthor\par
+	\vfill
+	\insertinstitute
+	\vspace*{0.5em}
+}
+\addtobeamertemplate{title page}{
+	\begin{tikzpicture}[remember picture, overlay]
+		\node[anchor=north east, yshift=2pt] at (current page.north east)
+		{	\includegraphics[height=0.4cm, align=c]{PSI_Logo.pdf}\hspace*{0.15cm}
+			\includegraphics[height=0.3cm, align=c]{iac_logo.pdf}\hspace*{0.15cm}
+			\includegraphics[height=0.4cm, align=c]{ETH_Logo.pdf}};
+\end{tikzpicture}}{}
+\makeatother
+
+% Title
+\author[D. Tschan]{
+	David Immanuel Tschan\inst{1}\\
+	\vspace*{1em}
+	Student ID: 20-914-180, E-Mail: \href{mailto:datschan@student.ethz.ch}{\texttt{datschan@student.ethz.ch}}\\
+	\vspace*{1em}
+	Supervised By:\\
+	Nicole Carina Leemann\inst{2}\and Prof. Dr. Markus Ammann\inst{2}}
+\subtitle{Master Seminar II: Presentation}
+\title{Photochemical reduction of Iodate through
+	Iron-containing Complexes in Secondary Organic
+	Aerosol from Monoterpene Oxidation}
+\institute{
+	\inst{1} Institute for Atmospheric and Climate Science, ETH Zurich \and
+	\inst{2} Laboratory for Atmospheric Chemistry, Paul-Scherrer Institute}
+\date{28.09.2026}
+
+
+\begin{document}
+	
+\frame[plain]{\titlepage}
+
+\frame{
+	\frametitle{some title}
+	\framesubtitle{something}
+}
+
+\section{Introduction}
+
+\begin{frame}
+	\frametitle{Hello world}
+	This is some text
+\end{frame}
+
+\begin{frame}
+	\frametitle{Some title}
+	Some words
+\end{frame}
+
+\end{document}