长久以来，西方钻石凭借其永恒性与稀有性，在爱情象征领域占据一席之地。据公开资料，钻石巨头“戴比尔斯”近年来屡次削减毛坯钻石价格，降幅高达40%以上，这场“价格风波”不仅震撼业界，还促使另一巨头“阿尔罗萨”试图通过销售暂停来平稳市场，不过未能奏效。从云 ...

As per the initial student reactions, the paper was moderately difficult. To help the students in assessing their performance ...

A team of Chinese researchers has developed a power-free device to extract plasma from whole blood with 99% separation ...

A team of researchers from Shenzhen Institutes of Advanced Technology, China has developed a power-free device to extract ...

CBSE conducted the Class 12 Chemistry exam on. Students can now check the answer key to assess their performance. The paper ...

Under the action of an external magnetic field, the diamagnetic particles and paramagnetic medium will generate negative magnetophoretic force due to different magnetic susceptibility, pushing the ...

据《2024年培育钻石产业发展白皮书》数据，2023年全球培育钻石毛坯产量逼近3000万克拉，中国占据全球市场70%以上份额，其中河南贡献全国8成，连四线柘城都年产400万克拉，一年创收200亿！

Cell culture is an important and necessary process in drug discovery, cancer research, as well as stem cell study. Most cells are currently cultured using two-dimensional (2D) methods but new and ...

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A material’s response to an applied magnetic field can be characterized as diamagnetic, paramagnetic, ferromagnetic or antiferromagnetic. Four-coordinate cobalt(II) complexes possess high energy ...

Venanzi, L., J. Chem. Soc., 719 (1958). Gill, N. S., Nyholm, R. S., and Pauling, P., Nature, 182, 168 (1958).