摘要:
The invention relates to a 3'-substituted nucleoside derivative represented by the following general formula (1): ##STR1## wherein B means a nucleic acid base which may have a substituent, Z represents a lower alkynyl or lower alkenyl group which may be substituted by a group represented by the formula: ##STR2## in which R.sup.a, R.sup.b and R.sup.c are individually a lower alkyl group or a phenyl group, or an oxiranyl group which may have at least one lower alkyl group, R.sup.1 and R.sup.2 individually represent H or an ester-forming residue capable of easily leaving in a living body, and R.sup.3 is H, a mono- or polyphosphoric acid residue, or an ester-forming residue capable of easily leaving in a living body, with the proviso that the sugar moiety is ribose, or a pharmaceutically acceptable salt thereof. The 3'-substituted nucleoside derivative according to the invention has an excellent antitumor activity and is hence useful for treatment for and prevention of cancers.
摘要:
An oligonucleotide derivative comprises repeating structural units represented by the following general formula (wherein B represents adenine, guanine, cytosine, or uracil; X represents a sulfur atom or an oxygen atom; n represents an integer of 6 to 60; and B and X are independently represented in each of the repeating structural units), wherein X is a sulfur atom in at least one of the repeating structural units represented by the general formula:
摘要:
To provide a viewing-angle-enhancing film which is set in a liquid crystal display device at a position nearer to an observer than the position of a liquid crystal layer in the device, and which attains, at a high level, the compatibility of being enhanced in viewing angle with a decrease in the darkening of images at the time of observing the screen from the front thereof. A viewing-angle-enhancing film which is set in a liquid crystal display device at a position nearer to an observer than the position of a liquid crystal layer in the device, and simultaneously satisfies the following requirements (1) to (3): (1) the film has a parallel ray transmittance of 5 to 90%; (2) the film has a diffusivity (A) of 1 to 20 degrees in its main diffusion direction; and (3) the film has a diffusivity ratio of 0.25 to 15% in the main diffusion direction.
摘要:
A copper foil reducing transmission loss at a high frequency and excellent in bond strength with a resin substrate, including at least a granular layer and a columnar layer in its thickness direction, the columnar layer being formed on at least one surface of the granular layer forming the copper foil or the granular layer being formed on at least one surface of the columnar layer forming the copper foil, the relation of the thickness A of the granular layer and the thickness B of the columnar layer in the copper foil being preferably A/(A+B)=40 to 99%, a method of production and apparatus for production for the same, and a high frequency circuit using the same.
摘要翻译:铜箔在高频下降低传输损耗,并且与树脂基板的粘合强度优异,其厚度方向至少包括粒状层和柱状层,所述柱状层形成在所述粒状层的至少一个表面上 铜箔或颗粒层形成在形成铜箔的柱状层的至少一个表面上,粒状层的厚度A与铜箔中柱状层的厚度B的关系优选为A /( A + B)= 40〜99%,制造方法及其制造装置以及使用该方法的高频电路。
摘要:
A conductive base material with resistance layer provided with roughened conductive base material on the surface of which the resistance layer is formed with uniform thickness distribution, and a resistance circuit board material using the same, wherein electrodeposited copper foil having granular crystals is roughening treated on at least one surface to obtain Rz of not more than 2.5 μm and the resistance layer of Ni alloy layer containing at least 8 to 18 wt % of P is formed on the roughening treated side.
摘要:
A copper foil reducing transmission loss at a high frequency and excellent in bond strength with a resin substrate, including at least a granular layer and a columnar layer in its thickness direction, the columnar layer being formed on at least one surface of the granular layer forming the copper foil or the granular layer being formed on at least one surface of the columnar layer forming the copper foil, the relation of the thickness A of the granular layer and the thickness B of the columnar layer in the copper foil being preferably A/(A+B)=40 to 99%, a method of production and apparatus for production for the same, and a high frequency circuit using the same.
摘要翻译:铜箔在高频下降低传输损耗,并且与树脂基板的粘合强度优异,其厚度方向至少包括粒状层和柱状层,所述柱状层形成在所述粒状层的至少一个表面上 铜箔或颗粒层形成在形成铜箔的柱状层的至少一个表面上,粒状层的厚度A与铜箔中柱状层的厚度B的关系优选为A /( A + B)= 40〜99%,制造方法及其制造装置以及使用该方法的高频电路。
摘要:
In a heavy duty pneumatic tire comprising a tread, the tread is made of a rubber composition comprising 20-67 parts by weight of carbon black and 3-20 parts by weight of silica based on 100 parts by weight of diene based rubber, wherein the carbon black has a ratio of a dibutyl phthalate (DBP) absorption to a 24M4 DBP absorption (DBP absorption/24M4 DBP absorption) of not less than 1.20 and a ratio of the DBP absorption to a nitrogen adsorption specific area (N2SA) of not less than 0.8.
摘要:
Compounds of formula (I): ##STR1## wherein: R.sup.1, R.sup.2 and R.sup.3 are independently selected from the group consisting of hydrogen atoms, optionally substituted alkanoyl groups and alkenylcarbonyl groups, PROVIDED THAT at least one of R.sup.1, R.sup.2 and R.sup.3 represents an unsubstituted alkanoyl group having from 5 to 24 carbon atoms, said substituted alkanoyl group or said alkenylcarbonyl group; and one of R.sup.4 and R.sup.5 represents a hydrogen atom and the other represents a cyano group; have valuable anti-tumor activity.
摘要翻译:式(I)的化合物:其中:R1,R2和R3独立地选自氢原子,任选取代的烷酰基和烯基羰基,提供了R1,R2和R3中的至少一个 表示具有5至24个碳原子的未取代的烷酰基,所述取代的烷酰基或所述烯基羰基; R 4和R 5中的一个表示氢原子,另一个表示氰基; 具有有价值的抗肿瘤活性。
摘要:
The present invention relates to a novel compound represented by the following formula [I] which is useful as a synthetic intermediate of a 2-alkynyladenosine.The present invention also relates to a process for producing the compound and a process for producing a 2-alkynyladenosine [IV] by way of the compound.Further, the present invention relates to a 2-alkynyladenosine derivative represented by the following formula [V] having excellent storage stability and, to a method of storing the 2-alkynyladenosine in the form of that derivative. ##STR1## [I] A=a leaving group, [II] A=NH.sub.2,[V] A=NHR.sup.4,wherein R.sup.1 through R.sup.4 represent a hydrogen atom or a protective group, and n denotes an integer of 1 to 15, provided that R.sup.1 through R.sup.4 do not represent a hydrogen atom simultaneously.
摘要翻译:本发明涉及可用作2-炔基腺苷合成中间体的下式[I]表示的新型化合物。 本发明还涉及该化合物的制备方法和通过该化合物制备2-炔基腺苷[Ⅳ]的方法。 此外,本发明涉及具有优异的储存稳定性的由下式[V]表示的2-炔基腺苷衍生物,以及以该衍生物的形式存储2-炔基腺苷的方法。 [I] A =离去基团,[II] A = NH 2,[V] A = NHR 4,其中R 1至R 4表示氢原子或保护基,n表示1至15的整数, R1至R4同时不表示氢原子。
摘要:
An electric contact material containing Li oxide of 0.01 to 2.0% by weight when represented in terms of the amount of Li, oxide of at least one rare earth element of 0.05 to 0.18% by weight when represented in terms of the amount of the rare earth element, and Ag or Ag alloy as the remaining portion; an electric contact material containing Li oxide of 0.01 to 2.0% by weight when represented in terms of the amount of Li, at least one rare earth element of 0.05 to 0.18% by weight when represented in terms of the amount of the rare earth element, at least one element selected from a group consisting of In, Sn, Zn, Mn, Pd, Sb, Cu, Mg, Pb, Cd, Cr and Bi by an amount of 0.1 to 1.0% by weight (however, in the case of Zn and Mn, the amount is set less than 0.5% by weight), and/or at least one element selected from a group consisting of Fe, Ni and Co by an amount of 0.03 to 0.6% by weight, and Ag as the remaining portion; and an electric contact formed by using the above material. It is excellent in the arc resistance, wear resistance an lubricity in a small current region and is suitable as the material for a slide contact and rotary slide contact.