Methods and means are provided to modify in a targeted manner the genome of a plant in close proximity to an existing elite event using a double stranded DNA break inducing enzyme. Also provided are plants, in particular cotton plants showing tolerance to a field dose of at least 1× of at least one HPPD inhibitor, and methods for making such plants.

Methods and means to modify a plant genome

A process for hydrogenation of conjugated diene polymers comprises hydrogenating said polymer in the presence of hydrogen and a hydrogenation catalyst composition comprising: (a) at least one titanium compound represented by the following formula (a): wherein R 1 and R 2 , which may be the same or different, represent a halogen atom, an alkyl group, an aryl group, an arakyl group, a cycloalkyl group, an aryloxy group, an alkoxy group or a carbonyl group, and Cp* represents a cyclopentadienyl group or a derivative having the formula of C 5 R 5 , and R 5 , which may be the same or different, represents a hydrogen atom, an alkyl group an aralkyl group and an aryl group; and (b) at least one silyl hydride.

Catalyst composition for hydrogenation of conjugated diene based synthetic rubbers

This invention relates to a method for the selective hydrogenation of the unsaturated double bonds in the conjugated diene units of a homopolymer or copolymer in the presence of a novel homogeneous organotitanium-based catalyst. Also, the process of this invention can demonstrate a high yield of hydrogenation and hydrogenation reproducibility using a novel catalyst, so prepared from a mixture consisting of a substituted or unsubstituted monocyclopentadienyl titanium compound expressed by the following formula 1 and lithium hydride derived from a reaction of both alkyl lithium and hydrogen in solution. In particular, this invention also relates to a novel method for the selective hydrogenation of unsaturated double bonds in the conjugated diene units of a conjugated diene polymer or copolymer, so prepared via the reaction between a conjugated diene monomer and vinyl-substituted aromatic monomer wherein, R 1 , R 2 , R 3 , R 4 and R 5 , which may be same or different, are selected from hydrogen atoms and alkyl groups of 1˜5 carbon atoms; X 1 , X 2 and X 3 , which may be same or different, are selected from halogen atoms.

Method for the selective hydrogenation of polymer containing conjugated diene

The invention relates to a method for improving the utilization of the production potential of transgenic plants by treating the plant with an effective amount of at least one compound of the formula (I) as described herein.

Method for improved utilization of the production potential of transgenic plants

This invention concerns a method for preparing a hydrogenation catalyst system process involving the reaction of a group 4 metallocene (A) with a metal hydride or an organometallic compound (B) at a (B)/(A) molar ratio that is larger than 10 followed by the activation of the resulting catalyst mixture with hydrogen at a hydrogen pressure p (in MPa) and at a temperature T (in °C), wherein a neutralising agent (C) that is capable of reacting with the compound (B) is added to the catalyst mixture: (a) either prior to the activation; b) within t hours from the activation wherein t equals x divided by (p * T * (B)/(A)), and x corresponds to 10,000, and a process for the hydrogenation of an olefinically unsaturated compound with hydrogen in the presence of a hydrogenation catalyst system obtained by the method of the invention.

A method for preparing a hydrogenation catalyst system

The invention provides a catalyst composition for hydrogenation of polymers containing ethylenical unsaturation which comprises at least: (a) a titanium compound of the formula ##STR1## (I) wherein A 1 represents an optionally substituted indenyl group of the formula ##STR2## wherein substituents R 1 and R 2 may be the same or different and each may be selected from halogen, phenyl which optionally may bear one or more the same or different substituents, lower alkyl, alkoxy, phenoxy, phenylalkoxy, benzyl, and a bulky substituent containing one or more hetero atoms such as tri (loweralkyl)silyl, --NPh 2 , --NHPh, --BPh 2 , and --B(OPh) 2 , wherein n may be an integer of from 0 to 4 and m may be an integer of from 0 to 3, (II)wherein A 2 has the same meaning as A 1 or alternatively represents an optionally substituted cyclopentadienyl group, and wherein L 1 and L 2 may be the same or different and each may be selected from hydrogen, halogen and preferred chlorine, lower alkyl, phenyl, aralkyl having from 7 to 10 carbons, a lower alkoxy group, phenyloxy, phenylalkoxy group having from 7 to 10 carbon atoms, carboxyl, carbonyl, a B-diketone coordination, a --CH 2 P(Phenyl) 2 , --CH 2 Si(lower alkyl) 3 or --P(phenyl) 2 group; and (b) an alkali metal hydride, added as such or prepared in situ in the polymer solution from the alkali metal terminated living polymer and/or from additionally added alkali metal alkyl. The invention also concerns a process for hydrogenation of polymers containing ethylenical unsaturation using this catalyst.

Process for hydrogenation of conjugated diene polymers and catalyst compositions suitable for use therein

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Process for hydrogenation of conjugated diene polymers and catalyst compositions suitable for use therein