diff --git a/src/app/home/home.component.ts b/src/app/home/home.component.ts
index e635cc9..c500d38 100644
--- a/src/app/home/home.component.ts
+++ b/src/app/home/home.component.ts
@@ -18,7 +18,7 @@ interface KeyInterface {
 export class HomeComponent implements OnInit {
 
   keys: KeyInterface[] = [];
-  isActiveKey: { [key: string]: boolean } = {};  // object to check if key is currently active
+  isActiveKey: { [key: string]: boolean } = {};  // Object to check if key is currently active
   myChart: Chart;
 
   constructor(
@@ -27,11 +27,11 @@ export class HomeComponent implements OnInit {
   ) { }
 
   ngOnInit() {
-    // fetch all available groups  
+    // Fetch all available groups  
     this.fetchData('/material/groups', data => this.createGroup(data));
   }
 
-  // api access with callback
+  // Api access with callback
   async fetchData(URL: string, processor: any) {
     this.api.get(URL, (sData, err, headers) => {
       processor(sData);
@@ -48,10 +48,10 @@ export class HomeComponent implements OnInit {
     this.keys = temp; // invoke update in rb-multiselect
     this.initChart();
 
-    // only neccesary if keys get preselected
+    // Only neccesary if keys get preselected
     //this.calcFieldSelectKeys();
 
-    // fetch all samples populated with according group
+    // Fetch all samples populated with according group
     this.getSamples();
   }
 
@@ -70,7 +70,7 @@ export class HomeComponent implements OnInit {
     }
   }
 
-  // loop through samples and count
+  // Loop through samples and count
   countSamples(data: any) {
     this.keys.map(key => key.count = 0);
     for (var i = 0; i < data.length; i++) {
@@ -83,14 +83,14 @@ export class HomeComponent implements OnInit {
     this.updateGraph();
   }
 
-  // preset select
+  // Preset select
   calcFieldSelectKeys() {
     this.keys.forEach(key => {
       this.isActiveKey[key.id] = key.active;
     });
   }
 
-  // update keys based on select
+  // Update keys based on select
   updateGroups(activeKeys: any) {
     this.keys.forEach(key => {
       if (activeKeys.hasOwnProperty(key.id)) {
@@ -100,7 +100,7 @@ export class HomeComponent implements OnInit {
     this.getSamples();
   }
 
-  // get data for graph based on active keys
+  // Get data for graph based on active keys
   updateGraph() {
     let nameList: string[] = [];
     let dataList: number[] = [];
@@ -116,7 +116,7 @@ export class HomeComponent implements OnInit {
     this.myChart.update();
   }
 
-  // draw graph
+  // Initialize graph
   async initChart() {
     this.myChart = new Chart("myChart", {
       type: 'bar',