摘要:
A method is provided for the regeneration of an individual coconut plantlet. It comprises culturing a tissue explant of an undifferentiated male flower of a coconut tree in a culture medium, which contains 10-50 ppm of an auxin, 0.1-3% of a polysaccharide produced by a bacterium of Pseudomonas and 0.05-1% of activated carbon, in a dark place until a shoot-like structure appears; and then culturing under exposure to light of 3,000-20,000 luxes while repeating its subculture in a fresh culture medium.
摘要:
A novel acidic heteropolysaccharide which comprises as its structural units arabinose, mannose, galactose, glucuronic acid, and xylose, at a specific ratio. The polysaccharide can be prepared by culturing a callus induced from a plant belonging to the genus Polianthes L. in a culture medium containing plant hormones. The polysaccharide can be used as a component of agents for external application and detergents, and provides good moisturizing effects and a smooth, satisfying feeling upon use. When formulated in detergents, they produce remarkable improvement in a clean, rich feeling upon use.
摘要:
A 7.beta.-acylamino-7.alpha.-alkoxycephalosporin is prepared by reacting a 7-acylaminocephalosporin with a halogenating agent to give an iminohalide, reacting the latter compound with a base to give a keteneimine, reacting the latter compound with a halogen to give an .alpha.-halogeno iminohalide, reacting the latter compound with an alkali metal alkoxide and consecutively either subjecting the resulting compound to hydrolysis, or reacting the resulting compound with an acid or a halogenosilyl compound followed by treating the resulting compound with water.The 7.beta.-acylamino-7.alpha.-alkoxycephalosporin is useful as an antibacterial agent.
摘要:
A hinge apparatus comprises a rotation body and a fixed body. The rotation body includes a frame which has a base body portion, a side portion being orthogonal to a rotation axis and having a first through hole and a cut portion, and a longer side portion having an extending portion and extending along the rotation axis. The extending portion is engaged with the cut portion and has a protruding portion protruding outwardly of the side portion from a tip end side thereof. The fixed body includes: a bracket having a base portion, a first and a second side portions, a superimposed portion extending from the second side portion so as to be overlapped with the first side portion, and an opening passing through the first side portion and the superimposed portion; and a stud inserted through the opening and rotatably securing the frame to the bracket. The protruding portion is contacted with the superimposed portion at a predetermined angle to regulate the rotation of the rotation body.
摘要:
An image recording apparatus comprises means for storing in a memory input image data as basic image data in a period of a predetermined number of fields as well as feeding the input image data to image compression means, means for finding, with respect to each of the input image data corresponding to the fields between the field corresponding to the input image data which has been stored in the memory and the field corresponding to the input image data which is to be subsequently stored in the memory, the difference between the input image data and the basic image data which has been most newly stored in the memory, and feeding data representing the obtained difference to the image compression means, and means for recording on a recording medium compressed data for each field which has been compressed by the image compression means, together with identification indicating whether the compressed data corresponds to the basic image data or the difference data.
摘要:
Compounds having inhibitory activity against inhibitory activity against type IV collagenase and are useful as angiogenesis, cancer infiltration or cancer metastasis inhibitors. The compounds have the formula: ##STR1## in which R.sup.1 represents a group of formula: --OR.sup.3 (wherein R.sup.3 represents a hydrogen atom or an alkyl group),--NR.sup.4 R.sup.5 (wherein R.sup.4 and R.sup.5 each represents a hydrogen atom, an alkyl or alkoxy group),--NHCH(R.sup.6 COR.sup.7 (wherein R.sup.6 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R.sup.7 represents an alkyl group),--NHCH(R.sup.6)COOR.sup.8 (wherein R.sup.8 represents an alkyl group) or--NHCH(R.sup.6)CONR.sup.9 R.sup.10 (wherein R.sup.9 and R.sup.10 each represents a hydrogen atom or an alkyl group, or NR.sup.9 R.sup.10 together represent a heterocyclic ring group); andR.sup.2 represents a hydrogen atom, an alkyl or aralkyl group.
摘要翻译:PCT No.PCT / JP92 / 01420 Sec。 371日期1994年6月27日第 102(e)日期1994年6月27日PCT提交1992年11月2日PCT公布。 第WO93 / 09097号公报 日期:1993年5月13日具有抑制IV型胶原酶抑制活性的化合物,可用作血管发生,癌症浸润或癌转移抑制剂。 化合物具有下式:其中R 1表示式-OR 3基团(其中R 3表示氢原子或烷基),-NR 4 R 5(其中R 4和R 5各自表示氢原子,烷基或烷氧基 基团),-NHCH(R6COR7(其中R6表示氢原子或具有1-4个碳原子的烷基,R7表示烷基),-NHCH(R6)COOR8(其中R8表示烷基)或-NHCH (R 6)CONR 9 R 10(其中R 9和R 10各自表示氢原子或烷基,或NR 9 R 10一起表示杂环基团); R 2表示氢原子,烷基或芳烷基。
摘要:
A video signal reproducing apparatus, such as a video disc player, equipped with a field memory for special reproduction such as still-picture reproduction. The video signal writing-reading period for the field memory is set to a value which is the color subcarrier period multiplied by an integer, is also the horizontal synchronizing period multiplied by an integer and is further approximate to one field period to the greatest possible extent, to thereby eliminate the discontinuity of video signals due to the track jumping action of the pickup.
摘要:
A germicidal herbicide for agriculture and horticulture, which comprises at least one compound, as an active ingredient having the formula (I);r--x--ch.dbd.ch--cooy (i)wherein R represents an alkyl or alkenyl group having 1 to 20 carbon atoms, X represents S, SO or SO.sub.2, and Y represents a hydrogen atom, an alkali metal, an alkaline earth metal, NH.sub.4, an alkyl or alkenyl group having 1 to 20 carbon atoms, a polyalcohol residue which may have therein ether bonds formed by intramolecular or intermolecular dehydration, an acetal glycerol residue, or an oxyethylene (1 to 20 units) or oxypropylene group (1 to 20 units) terminated by an alkyl group having 1 to 20 carbon atoms.
摘要:
A process for preparing a 7.beta.-acylamino-7.alpha.alkoxycephalosporin or 6.beta.-acylamino-6.alpha.-alkoxypenicillin which comprises either (a) reacting a 7.beta.-(.alpha.'-halogeno or .alpha.'-hydroxyacylamino)cephalosporin or 6.beta.-(.alpha.'halogeno or .alpha.'-hydroxyacylamino)penicillin with a halogenating agent to give a .alpha.-halogeno-iminohalide, reacting the latter compound with an equimolar amount of an alkali metal alkoxide in the presence of one equivalent amount of a base to give a 7.alpha.-alkoxyketeneimine and subjecting the latter compound to hydration; or (b) reacting the 7.beta.-(.alpha.'-halogeno or .alpha.'hydroxyacylamino)cephalosporin or 6.beta.-(.alpha.'-halogeno or .alpha.'-hydroxyacylamino) penicillin with the halogenating agent to give the .alpha.-halogeno-iminohalide, reacting the latter compound with two equimolar amounts of the alkali metal alkoxide in the presence of one equivalent amount of the base to give a dialkoxyimino compound, reacting the latter compound with a halogeno-silyl compound or an acid and treating the resulting product with water.The final products are useful as antibacterial agents or intermediates thereof.
摘要:
The error correction processing includes: data reproduction processing of reproducing recording data, constituted by a plurality of data units each made of a plurality of bits, from a recording medium sequentially; error correction processing of performing error correction in the row direction and error correction in the column direction at least once for an error correction code block that has the reproduced recording data arranged in the row direction over a plurality of rows; determination processing of determining whether uncorrectable data is left behind after execution of the error correction processing; and erasure correction processing of performing, when it is determined that uncorrectable data is left behind, column-direction error correction considering data constituting at least one row of the error correction code block as erasure data, even in cases where uncorrectable data in the error correction in the row direction is not left behind.