Title
Rntgenstrukturanalyse Organischer Verbindungen: Eine Einfhrung (Anleitungen Fr Die Chemische Laboratoriumspraxis, 12) (German Ed,Used
Delivery time: 8-12 business days (International)
Not so long ago Roentgenray crystallography was a rather esoteric science reserved for a fairly small group of specialists. Perusal of the recent literature shows that the number of publications per year con cerned with crystal structure analysis by xray diffraction has increased by a factor of ten in the last ten years. This great increase can be at tributed to a number of factors. An analysis of a molecule which may contain eighty atoms, excluding hydrogen atoms, involves the collection of about 6000 independent reflections. Before the advent of the automatic diffractometer, an instrument which records intensity data while the investigator is free to be occupied otherwise, the estimation of the intensities of the reflections by eye or by photometer was a formidable task. Even if such a large number of data were collected, processing these data was an impossible task until the development of highspeed computers. A third factor was the advancement made in the theory of structure analysis such as the use of isomorphous replacement, anomalous dispersion and direct methods for phase determination. As a result, at the present time it is possible to determine the structure of virtually every material which forms good single crystals, regardless of the number of atoms or whether or not heavy atoms are present.
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.
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, please visit www.P65Warnings.ca.gov.
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.
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.
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.).
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.).
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.
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.