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Research and development for fhe production of pyrocatechol and hydroquinone by reaction of phenol with hydrogen peroxide and percarboxylic acid as hydroxylating reagent are introduced.

用过氧化氢和过氧化羧酸羟基化剂,使苯酚羟基化生成苯二酚和对苯二酚的研究开发进展。

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This paper intends to report three experimentally simple preparations of naphthoquinone, hydroquinone and the corresponding mixed quinhydrone,all redox chemistry being carried out in the solid state.

报导了通过固体氧化用以制取α-萘醌,氢醌以及对应的醌氢醌试剂,所有反应均在固体状态下进行.

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livingstonite, livonal, Livonia, Livonian, livor, Livorno, LIVR, livraison, livre, Livy,

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3G, 401(K), a,

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VOA常速英语_

When used medically, hydroquinone can be an effective treatment for skin discoloration.

医学上使用对苯二可以有效地治疗皮肤变色。

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VOA Special 2014年7月合集

She uses a cream that is made from carrots and not the strong chemical, hydroquinone.

她使用胡萝卜制成的一种面霜,不含强化学物质对苯二

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VOA常速英语_

Critics point out the ban have failed to stop smuggled hydroquinone products from being sold openly.

批评人士指出,禁令未能阻止走私对苯二产品公开销售。

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VOA常速英语_

The East African Legislative Assembly last week passed a resolution on the region-wide ban of hydroquinone's manufacture and importation.

上周,东立法会议通过了一项整个地区禁止对苯二生产和进口的决议。

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VOA常速英语_

Skin whitening products often use high concentration of hydroquinone which can cause skin problems or mix with other bleaching chemicals become toxic.

皮肤美白产品经常使用高浓度的对苯二,这会导致皮肤问题,或与其他漂白化学品混合,从而产生毒性。

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lixivium, Liz, Liza, Lizarazu, lizard, lizard fish, lizardite, lizards, Lizbeth, Lize,

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3G, 401(K), a,
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