Defines if the queue subscribed to is durable saved to persistent storage or transient will disappear if the AMQP broker is restarted. This option should be used in conjunction with the Persistent option on the publish side. QueueAutoDelete true false Subscribe only Defines if the queue subscribed to will be deleted once the last consumer unsubscribes.
Unspecific isotopic enrichment Reactions Also, InChI is not suitable for very large compounds; technically, InChI input may not contain more than atoms.
Details of these efforts can be found at: Composition and Connectivity 5. Does the formula always represent the complete composition of the substance?
Normally yes, but if a charged species can be described by de protonation from a neutral compound, then it will not. There is no connection layer for just an elemental atomic argon Ar, silver Ag, etc. However, the semantics of such an InChI are not precisely defined. No, it is absent if the compound does not contain hydrogen, e.
How does InChI deal with structures that are composed of multiple interconnected covalently bonded components? Many substances are best represented as multiple, independent structures. InChI creation assumes that if multiple structures are present in a single input connection table, they are components of a single compound.
In most cases, it is possible to extract the InChI of each component from a composite InChI by excising the corresponding part of each layer.
The order of the components in the layers is strictly defined. In InChIs of structures containing more than one component, is the ; separator necessary between contributions from components if one contribution is empty? Delimiters between components are kept if at least one connection table is not empty.
In the case of a structure where no component contains any information for a particular layer for instance the atom connection layer in CH3-Zn-CH2-Zn-CH3 the connection layer is omitted. If you are confused by the absence of Zn-C connections in these examples, look at the topic 7.
Can InChI represent mixtures? In general, it can not. There are minor exceptions though.
See the topics 8. Multi-component InChIs see above may be considered as representing equimolar mixtures of compounds that are not interconnected.
Treating Mobile Hydrogens 6. How does InChI represent compounds with mobile H atoms tautomerism, for example? This is achieved by the logical removal of mobile-H atoms and the tagging of H-donor and H-receptor atoms.
As an example, look again at guanine some of whose tautomeric structures are shown below: Donors and receptors of H and changeable bonds are highlighted.
If we take a closer look at the hydrogen sub-layer of the Main Layer we see that atom number 1 has one H and 4 atoms H are shared by atoms 6, 7, 8, 9, 10 and Why is there a Fixed-H layer if tautomeric groups are shown in the main layer?
The Fixed-H layer is useful if you wish to represent a particular tautomer of a given structure. However, if one provides FixedH option, then the extra Fixed-H layer is appended.
This layer is essentially an InChI for the whole structure without the normalization of the mobile hydrogen atom locations. This produces an InChI that specifies a single tautomeric form of the structure: Can InChI contain multiple mobile H groups in the hydrogen layer?
The mobile hydrogen groups are: H2,3,5 — showing that there are two hydrogen atoms that are mobile between atoms with canonical numbers 3 and 5. H2,4,6 — showing that there are two hydrogen atoms that are mobile between atoms with canonical numbers 4 and 6.Hyperlinked definitions and discussions of many terms in cryptography, mathematics, statistics, electronics, patents, logic, and argumentation used in cipher construction, analysis and production.
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