国产性猛交xxxx免费看久久,日韩有色视频在线观看,国产福利亚洲天堂久久,国产精品久久久久久久精品三级

過硫酸銨也是過硫化鈣 (APS)，是一種無機化合物，分子式為 (NH4)2S2O8。 它是一種無色（白色）鹽，極易溶于水，比相關(guān)的鉀鹽更易溶解。 它是一種強氧化劑，用作高分子化學(xué)中的催化劑、蝕刻劑以及清潔劑和漂白劑。

　　Ammonium persulfate, also known as calcium persulfate (APS), is an inorganic compound with the molecular formula (NH4) 2S2O8. It is a colorless (white) salt that is highly soluble in water and more soluble than related potassium salts. It is a strong oxidant used as a catalyst, etchant, cleaner, and bleach in polymer chemistry.

　　過硫酸銨因其強大的氧化性能而被用于蝕刻印刷電路板上的銅，作為氯化鐵溶液的替代品。 這個屬性是多年前發(fā)現(xiàn)的。 1908 年，John William Turrentine 使用稀過硫酸銨溶液蝕刻銅。 在將銅螺旋放入過硫酸銨溶液中一小時之前，Turrentine 稱重了銅螺旋。 一小時后，再次稱重螺旋并記錄被過硫酸銨溶解的銅量。 這個實驗擴展到其他金屬，如鎳、鎘和鐵，所有這些都產(chǎn)生了相似的結(jié)果。

　　Ammonium persulfate is used to etch copper on printed circuit boards as a substitute for ferric chloride solution due to its strong oxidizing properties. This attribute was discovered many years ago. In 1908, John William Turrentine used a dilute ammonium persulfate solution to etch copper. Turrentine weighed the copper helix one hour before placing it in the ammonium persulfate solution. After one hour, weigh the spiral again and record the amount of copper dissolved in ammonium persulfate. This experiment was extended to other metals such as nickel, cadmium, and iron, all of which produced similar results.

　　空氣中含有過硫酸銨的粉塵接觸后可能會刺激眼睛、鼻子、喉嚨、肺和皮膚。 接觸高濃度粉塵可能會導(dǎo)致呼吸困難。

　　Dust containing ammonium persulfate in the air may irritate the eyes, nose, throat, lungs, and skin upon contact. Exposure to high concentrations of dust may cause difficulty breathing.

　　已經(jīng)注意到過硫酸鹽是哮喘作用的主要原因。 此外，有人提出，接觸過硫酸銨會導(dǎo)致在美發(fā)行業(yè)工作的美發(fā)師和接待員出現(xiàn)哮喘病。 這些哮喘效應(yīng)被認(rèn)為是由半胱氨酸殘基以及甲硫氨酸殘基的氧化引起的。

　　It has been noted that persulfate is the main cause of asthma. In addition, some people have suggested that exposure to ammonium sulfate can lead to asthma in hairdressers and receptionists working in the hairdressing industry. These asthma effects are believed to be caused by the oxidation of cysteine residues and methionine residues.

　　本文由過硫酸銨_過硫酸鉀_過硫酸鈉_順酐廠家向大家友情奉獻(xiàn).更多有關(guān)的知識請點擊:http://www.gzuvafuz.cn我們將傾情為您解答.

　　This article is a friendly contribution from the manufacturers of ammonium persulfate_potassium persulfate_Sodium persulfate and maleic anhydride For more information, please click: http://www.gzuvafuz.cn We will wholeheartedly provide you with answers