Title
UVVISSpektroskopie groer KohlenwasserstoffMolekle: Polyzyklische aromatische Kohlenwasserstoffe und Diamantoide im astrophysi,Used
Delivery time: 8-12 business days (International)
Der Ursprung der diffusen interstellaren Banden und des UVBumps bei 217.5 nm beschftigt Astrochemiker inzwischen seit mehr als einem halben Jahrhundert. Eine Aufklrung der urschlichen Bandentrger verspricht entscheidende Erkenntnisse ber die Physik und Chemie der interstellaren Materie. Diese Arbeit befasst sich mit den elektronischen Absorptionseigenschaften groer, auf dem Element Kohlenstoff basierender Molekle, fr deren Vorhandensein im interstellaren Medium (ISM) deutliche Hinweise existieren. Dabei wurden unter Anwendung von Laborexperimenten, die die Bedingungen des ISM simulieren, sowie in Kombination mit theoretischen Vorhersagen polyzyklische aromatische Kohlenwasserstoffe (PAHs) und Diamantoide in neutraler und einfach ionisierter Form nher untersucht. Unter anderem konnte gezeigt werden, dass PAHs fr den Bump in der Extinktionskurve bei 217.5 nm verantwortlich sein knnen, wenn sie im Mittel aus etwa 50 CAtomen bestehen.
By changing our most important processes and
products, we have already made a big leap forward. This ranges from the
increased use of more sustainable fibers to the use of more
environmentally friendly printing processes to the development of
efficient waste management in our value chain.
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We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Secure Payment
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.