First, many of the things you are describing are not really suitable for PPTs: research papers? Thesis?
I don't know of a simple "1-step" method. I would use a several step process.
Many PDFs will allow you to select and copy text from them. You can Paste that into the PPT. You can use screen capture tools to get pictures of the Pictures and graphics from the PDFs to paste into PPT.
For PDFs that are secured to prevent you from copying text you will have to try using an OCR tool. MODI, MS Office Document Imaging (program) in the Tools folder will extract text from images.
PDF To Word Free
http://www.topshareware.com/PDF-to-Word-Free-download-94615.htm
2013 03 01, A quick review of the app shows it is worth using. It converts to text only, no character formatting preserved. Line placement is maintained, using a para mark at the end of each line (which I find acceptable). Graphics, and tables
(?) are excluded. Short lines indicate where graphics have been excluded.
Handles columns intelligently, working left to right, placing extracted text top down in correct order.
OCR anything with OneNote 2007 and 2010
http://www.howtogeek.com/howto/14595/ocr-anything-with-onenote-2007-and-2010/
You can also use Word as an intermediate step. Convert the PDF to Word,then move it into PPT
Convert a PDF to a Word Document
http://www.ehow.com/how\_7163625\_import-pdf-files-word.html
PDF to Word
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Open a Web browser. Go to the PDF Converter website **http://www.freepdfconvert.com/convert\_pdf\_to\_source.asp******. Click “Browse,” then select a PDF file from your computer files. Click “Open” to upload the PDF. Select “Word (doc)” next to “Output format.” Enter a valid email address. Select “Attach files to email,” then click “Convert Your File.” Your converted Word
document will be sent via email. Open the email, download the file and open it in Word.
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Go to the PDF Online PDF2Word converter http://www.pdfonline.com/pdf2word/index.asp . Click “Browse” to upload a PDF from your computer. Click “Upload and Convert,” then wait while the file is converted. Right-click the highlighted link, then click “Save Link as” to download
the Word document as a zip file. Double-click the zip file to open the Word document.
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Go to Zamzar, a free online conversion website
http://zamzar.com/ . Click “Browse” to upload a PDF from your computer. Click the “Convert file to” menu and select “doc.” Enter your email address, then click “Convert.” The file will be sent via email.
Open the email, download the Word document and open it in Word.
How to Convert a PDF Image to Word Text
www.ehow.com/how_6851773_convert-pdf-image-word-text.html
How to Import PDF Files to Word Documents
http://www.ehow.com/how_6938934_import-pdf-files-word-documents.html
How to Convert PDF Drawings to Word With Freeware
http://www.ehow.com/how_5746610_convert-pdf-drawings-word-freeware.html
Converting PDF to Word Documents
http://word.tips.net/T000096_Converting_PDF_to_Word_Documents.html
You could also use OneNote as an intermediate step
PDF to OneNote
If you can’t import the PDF into OneNote, you can use the OneNote printer driver to “Print to OneNote”.
XPS2OneNote - Print to OneNote 2007 on 64 bit Vista or Windows 7 OS
https://xps2onenote.codeplex.com/