2018年8月8日 · HDCVI technology guarantees long-distance and real-time transmission without any loss. It supports up to 700m for 5MP HD video via coaxial cable, and up to 300m via UTP cable.* *Actual results verified by real-scene testing in Dahua's test laboratory.

HDCVI technology guarantees real-time transmission at long distance without any loss. It supports up to 700 m for 5MP HD video via coaxial cable, and up to 300 m via UTP cable.* *Actual results verified by real-scene testing in Dahua's test laboratory.

2019年4月5日 · 四氢吡喃(thp)对醇的保护在有机合成中是十分有用的工具。 手性醇与二氢吡喃的反应引入了另外一个非对称中心，因此得到非对映混合物 (式1)。 这对纯化和光谱分析带来一定的困难，但并不妨碍其成功的应用[1]。

延胡索乙素 （英語： Tetrahydropalmatine, THP，直译 四氢帕马丁）是一种 异喹啉类生物碱 （英语：Isoquinoline alkaloids），主要存在于作为草药的 紫堇属 植物（延胡索） [4][5] 和 千金藤属 植物中 [6]。 制药工业已合成出效力更强的 对映异构 体 左旋 延胡索乙素 （罗通定、 l -THP，也常误写作L-THP），作为 抗焦虑药 和 镇静剂 如 苯二氮䓬类 药物以及 镇痛药 如 阿片剂 的替代品在全球以不同品牌名销售。 它也作为 营养补充品 销售。 1940年， 越南 科学家Sang Dinh Bui从 …

2025年3月18日 · 常用试剂----3,4-二氢-2H-吡喃 3,4-二氢-2H-吡喃广泛用于羟基的保护，一般不与亲核试剂和有机金属试剂反应，耐强碱，在低pH 值或者Lewis 酸条件下易变化。 2021/11/8 14:59:32. 3,4-二氢-2H-吡喃的制备和应用 3,4-二氢-2H-吡喃是一种有机中间体，常用作保护基。 3,4-二氢-2H-吡喃可由四氢糠醇制备得到。 2020/8/14 13:26:39. -70 °C (lit.) 86 °C (lit.) 0.922 g/mL at 25 °C (lit.) n 20/D 1.440 (lit.) Store below +30°C. 3,4-二氢-2H-吡喃，简称DHP，是一种有机 …

The Dahua DH-HAC-HFW 1200 THP-I4 (3.6mm) is a 2-megapixel, high-performance, cost-effective bullet camera designed for indoor and outdoor surveillance. It features a 1/2.7 inch CMOS sensor that captures clear, high-definition video footage at up to 1080p resolution.

2020年4月20日 · DH-HAC-HFW1400THP-I8_datasheet_20200420 - Free download as PDF File (.pdf), Text File (.txt) or read online for free.

With its advanced Wide Dynamic Range technology (WDR), the camera captures highly detailed images and produces high-definition recordings in high-contrast lighting conditions, and in scenes with backlighting or shadows. With its intelligent algorithm, the camera automatically adjusts its parameters to provide optimal performance and vivid images.

Dihydropyran (DHP) undergoes autocatalyzed hydration to 2-hydroxytetrahydropyran (2-HY-THP) by carboxylic acids formed in situ in both batch and continuous flow reactors. NMR, GC–MS, and pH analysis corroborate the presence of carboxylic acids in the hydration products.

3,4-Dihydropyran (DHP) is a heterocyclic compound with the formula C 5 H 8 O. The six-membered C 5 O ring has the unsaturation adjacent to oxygen. The isomeric 3,6-dihydropyran has a methylene separating the double bond and oxygen. DHP is used for protecting group for alcohols. It is a colorless liquid. [1]