Abstract:
The invention relates to a process for producing all trans-vitamin A ester (I). According to the present invention, vitamin A ester (I) can simply be synthesized in good yields and high purity by the reaction of phosphonate compound (IV) with aldehyde (II) in an organic solvent in the presence of a base.
Abstract:
A process for the production of a zeolitic material having an LEV-type framework structure comprising YO2 and optionally comprising X203, wherein said process comprises preparing a mixture comprising one or more sources for YO2, one or more solvents, and optionally comprising seed crystals; and crystallizing the mixture; wherein Y is a tetravalent element, and X is a trivalent element, and wherein the crystallized mixture contains 0.1 wt.-% or less, more preferably 0.01 wt.-% or less of one or more metals M based on 100 wt.-% of YO2, wherein even more preferably the crystallized mixture contains no metal M, wherein M stands for sodium and/or potassium, wherein preferably M stands for the group of alkali and alkaline earth metals.
Abstract:
An electrical connector includes an insulative housing (1) defining a base portion and a tongue portion extending forwardly from the base portion; a plurality of terminals (2) each having a retention portion, a contacting portion extending forwardly from the retention portion and a tail portion; an insulative spacer disposed behind the base portion, and the insulative spacer (3) defining a plurality of positioning holes for the tail portions passing therethrough, respectively; and waterproof material (5) stuffing corresponding seam between the insulative spacer and the base portion.
Abstract:
An electrical connector (100) includes an insulative housing (1) defining at least a passageway (11) and a mating face (101), at least a contact terminal (2) received in the passageway (11) and having a contact arm (24) extending beyond the mating face (101). The contact terminal (2) includes a base portion (23) with a cutout (233) providing a yielding space to receive a portion (241) of the contact arm (24) when it is depressed.
Abstract:
A method of aligning electronic components comprising providing a positioning member 110 having at least one formation 120 for receiving an electronic component; said at least one formation having lateral boundaries 35, 36 for constraining movement of an electronic component; placing a first electronic component 10a in said at least one formation; and providing a force for actively aligning said first electronic component with a lateral boundary of said at least one formation. The force may, for example, be provided by tilting the positioning member, by providing suction or by using an actuator. An apparatus for aligning electronic components and a 3D system of stacked electronic components is also disclosed.
Abstract:
An electrical connector (100) includes an insulative housing (1) defining at least a passageway (11) and a mating face (101), at least a contact terminal (2) received in the passageway (11) and having a contact arm (24) extending beyond the mating face (101). The contact terminal (2) includes a base portion (23) with a cutout (233) providing a yielding space to receive a portion (241) of the contact arm (24) when it is depressed.
Abstract:
There is described a method of forming a through-silicon-via to form an interconnect between two stacked semiconductor components using pulsed laser energy. A hole is formed in each component, and each hole is filled with a plug formed of a first metal. One component is then stacked on another component such that the holes are in alignment, and a pulse of laser energy is applied to form a bond between the metal plugs.
Abstract:
This invention relates to methods and systems of helping consumers to manage their shopping tasks with an internet based shopping task management service. Shopping related information along with other information collected by said service is taken into consideration in the process of selecting relevant advertising information. Selected advertising information is then presented to consumers through said service. Consumer reactions to presented advertising information as well as other information obtained by consumers are collected, stored and made available for consumers to process.
Abstract:
Described is an organotemplate-free synthetic process for the production of a zeolitic material having an LEV-type framework structure comprising YO2 and optionally comprising X2O3, wherein said process comprises:(1) preparing a mixture comprising seed crystals and one or more sources for YO2; and(2) crystallizing the mixture obtained in step (1);wherein Y is a tetravalent element, and X is a trivalent element, wherein the zeolitic material optionally comprises one or more alkali metals M, and wherein the seed crystals comprise zeolitic material having an LEV-type framework structure. Also described is a zeolitic material having an LEV-type framework structure obtainable by said process, as well as an organotemplate-free zeolitic material having an LEV-type framework structure comprising YO2 and optionally comprising X2O3, wherein Y is a tetravalent element, and X is a trivalent element, wherein the zeolitic material optionally comprises one or more alkali metals M, wherein said zeolitic material is non-calcined.
Abstract translation:描述了一种用于生产具有包含YO 2和任选地包含X 2 O 3的LEV型骨架结构的沸石材料的合成方法,其中所述方法包括:(1)制备包含晶种和一种或多种YO2源的混合物 ; 和(2)使步骤(1)中获得的混合物结晶; 其中Y是四价元素,X是三价元素,其中所述沸石材料任选地包含一种或多种碱金属M,并且其中所述晶种包含具有LEV型框架结构的沸石材料。 还描述了具有通过所述方法可获得的LEV型骨架结构的沸石材料,以及具有无机无模板的沸石材料,其具有包含YO 2和任选地包含X 2 O 3的LEV型骨架结构,其中Y是四价元素,X 是三价元素,其中沸石材料任选地包含一种或多种碱金属M,其中所述沸石材料是未煅烧的。