摘要:
Novel 2,4-Bis-(stilben-4'-yl)-v-triazoles of the formula ##STR1## wherein the rings A, B, C, D and E can contain certain nonchromophoric substituents, methods for their preparation as well as their use as optical brighteners are disclosed.
摘要:
A system and/or method that effectuates and facilitates the generation and provision of differential pricing policies based at least in part on the relative social network standing that a seller might have with a potential purchaser are provided. The system includes a component that receives data associated with a seller, a good, or a service that the seller lists for sale or barter in an online market place. The component determines, based at least in part on the particular good or service, a differential pricing policy that can be associated therewith. The differential pricing policy can then be utilized to selectively provide differentiated prices to a purchaser based on a relative social network standing that can be established between the purchaser and the seller.
摘要:
A unique system and method that facilitates trust-based interaction within an online social marketplace is provided. The system and method involve allowing users of the marketplace to selectively interact with one another according to a trustworthiness factor. Users can be deemed trustworthy depending on which email groups they belong to with respect to one another. For example, sellers can limit who can view their listings and when based on trust levels associated with their social groups, communities, or networks. Notifications of new or modified listings can also be sent to potentially interested users based on the users' trust levels. A ratings system can be employed as well to facilitate boosting or diminishing a user's or group's trust level. The social marketplace can include such activities as a listing service to buy, sell, or give items to others, dating and other personal listings, and job searching.
摘要:
A positioning mechanism and method for fitting a needle on an injection device with an associated needle cover wherein the needle cover has at least one positioning element for guiding or positioning a needle to a pre-defined position relative to the injection device.
摘要:
Detergents which, in addition to inorganic and/or organic peracids, contain specific stilbene compounds as fluorescent whitening agents. These detergents are stable for several months and already show the customary cleaning properties at washing temperatures of 20.degree.-60.degree. C.
摘要:
The distyrylbiphenyls of the formula ##STR1## in which X and X' independently of one another are a direct bond, oxygen, sulfur, --O--C.sub.1-3 -alkylene-CON(R.sub.4)----CON(R.sub.4)--, --O--C.sub.1-3 -alkylene-COO--, OCO or --COO--, with the proviso that if n+n'=O, X and Y' may not be --CON(R.sub.4)-- or O--C.sub.1-3 -alkylene-CON(R.sub.4)--, and if n+n'=2 and X and X' are --CON(R.sub.4)-- or --COO--, A.sup..crclbar. may not be a phosphite or phosphonate anion, and Y and Y' independently of one another are C.sub.1-20 -alkylene, R.sub.1 and R.sub.1 ' independently of one another are unsubstituted or substituted C.sub.1-8 -alkyl or C.sub.3-4 -alkenyl, or R.sub.1 together with R.sub.2, or R.sub.1 ' together with R.sub.2 ', is a heterocyclic ring, R.sub.2 and R.sub.2 ' independently of one another are unsubstituted or substituted C.sub.1-8 -alkyl or C.sub.3-4 -alkenyl, or R.sub.2 together with R.sub.1, or R.sub.2 ' together with R.sub.1 ', is a heterocyclic ring, or R.sub.1 and R.sub.2, or R.sub.1 ' and R.sub.2 ', together with R.sub.3 are a pyridine or picoline ring, R.sub.3 is hydrogen, unsubstituted or substituted C.sub.1-4 -alkyl or C.sub.3-4 -alkenyl or together with R.sub.1 and R.sub.2, or with R.sub.1 ' and R.sub.2 ', is a pyridine or picoline ring, R.sub.4 is hydrogen or unsubstituted or substituted C.sub.1-6 -alkyl, A.sup..crclbar. is a colorless anion and n and n' independently of one another are the number 0 or 1, and the benzene nuclei B and C can also be substituted by non-chromophoric substituents, can be prepared by reacting a correspondingly substituted benzaldehyde with a biphenyl phosphonate and then alkylating or protonating the distyrylbiphenyldiamine formed. The distyrylbiphenyls are fluorescent brightening agents for organic materials. They are particularly suitable for use as additives for textile and laundry after-treatment agents which contain cationic textile softeners.
摘要:
The invention relates to vinylstilbene compounds of the formula ##STR1## wherein Q is the grouping --COX or ##STR2## These compounds are obtained by reacting 1 molar equivalent of a compound of the formula II ##STR3## wherein X is chlorine, bromine or iodine, in the presence of a base and with the addition of palladium metal or of palladium compounds, as catalyst, which, under the reaction conditions, form labile palladium(O) compounds which do not contain phosphorus, with 1 molar equivalent of a compound of the formula III or with 1 molar equivalent of each of the compounds of the formulae III and IV ##STR4##
摘要:
The invention relates to stilbene compounds of the formula ##STR1## wherein X is halogen, R is hydrogen, --SO.sub.3 M, halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy and M is hydrogen or a salt-forming cation. These compounds are starting materials for obtaining known fluorescent whitening agents of the 4,4'-distyrylbiphenyl series.
摘要:
The present invention concerns a method for processing a fiber sliver in a drafting arrangement, and a drafting arrangement for implementing the method. The objective for a drafting arrangement, which can be adapted to a wide range of staple lengths, to draft a fiber sliver at high speeds, has led to the following features of the invention:(a) The fiber sliver is deflected simultaneously in the drafting process systematically in such a manner that, the fiber sliver can be inserted into the subsequently arranged funnel and the subsequently arranged pair of calender rolls without further deflection.(b) All bottom rolls are fixedly arranged.(c) The first pressure rolls limiting the pre-drafting zone and the main drafting zone, respectively, are arranged to be shiftable along an arc about the rotational axis of the corresponding bottom roll in such a manner that the drafting zones are adaptable to the fiber length.In order to position these pressure rolls accurately in parallelism with respect to the corresponding bottom roll on the arc, there are provided arresting devices co-axially arranged with respect to the arc for taking-up bearing block pairs supporting the pressure rolls.(d) All pressure rolls as well as the pressure roll mounted on a double arm are jointly pivotable from a lifted-off threading-in position to a working position and vice versa.
摘要:
The bis-styrylbenzene of the formula ##STR1## and the alkali metal, alkaline earth metal, ammonium and amine salts thereof, a process for its production and a method of whitening organic material which comprises the use of this compound.