Advantages of using line spectral light sources for measuring the optical rotation 1. Sodium lamp Also known as D-line, it exhibits strong line-spectral emission at wavelengths of 589.6 nm and 589.0 nm and does not emit light at other wavelengths. Therefore, it has been the primary light source for optical rotation measurement. Furthermore, when expressing optical rotation or specific rotation, only the Sodium D-line can be recorded as "D". 2. Mercury lamp Because ...

Application of JASCO Palmtop Raman Spectrometer PR-1w Features of Ball lens and Measurement example for Ore How to use the attachment of Ball lens? 1. Remove the standard lens and attach the ball lens. 2. Press the lens against the sample, and make fine adjustments with the Z-stage unit. ...

Production of an immunogenic trivalent poliovirus virus-like particle vaccine candidate in yeast using controlled fermentation Abstract The success of the poliovirus (PV) vaccines has enabled the near-eradication of wild PV, however, their continued use post-eradication poses concerns, due to the potential for virus escape during vaccine manufacture. Recombinant virus-like particles (VLPs) that lack the viral genome remove this risk. Here, we demonstrate the production of PV VLPs...

JASCO LC withPalmtop Raman spectrometer to monitor the reaction system of flow synthesis process Introduction Organic synthesis is conventionally carried out by batch methods, but continuous-flow synthesis has recently been attracting attention because it is easy to scale up chemical reactions and allows stable production of the desired compound. We have developed a new measurement system using the compact JASCO Palmtop Raman spectrometer to monitor flow synthesis. ...

Analysis of the orientation and secondary structure of spider silk using polarized microscopic Raman spectroscopy Introduction Spider silk is a remarkable protein material with tensile strength greater than steel while at the same time being more ductile than nylon. Spider silk is attracting attention as a source of next-generation materials. It exhibits partial crystalline properties where the protein molecules are oriented parallel to the fiber axis during self-assembly. The aggregat...

The FT/lR-6X and FT/lR-8X spectrometers offer a highly configurable optical system applicable to virtually any FTIR application, from simple Mid IR measurement to more complex analysis in the farthest reaches of the electromagnetic spectrum. Research-based measurements are easily performed on the FT/lR-6X or FT/lR-8X spectrometers with options such as full-vacuum, gold-coated optics, rapid & step scan and FT-Raman for more advanced experiments. Exchangeable elements com...

SK-300SII 隨著電子部品的小型化，產生了電子材料的精密攪拌和攪拌時候混入的氣泡的高精度脫泡的需求，日本寫真化學（SHASHIN KAGAKU）製造的公轉自轉攪拌脫泡裝置（Planetary mixer）提供了搭載1個馬達即可變化回轉比例的機能，並能廣泛地設定公轉和自轉的回轉數。 領域、用途、材料 智能手機等IT產品、汽車和家電、生活家電等日常生活中使用的產品，被很多高性能的電子零件所支持。製造這些電子零件必須有稀有金屬等高價的電子材料、磁性材料、功能性材料等。還有太陽能面板、充電電池、燃料電池等先...

什麼是迴轉振盪機? 迴轉振盪機（Vertical Rotary Shaker）又稱旋轉式振盪機，具有迴轉、速度控制、時間控制功能，用於均勻混合液體樣品或培養細胞。透過圓周運動及振盪來攪拌容器中的液體，能提供穩定的振盪混合效果，適合需要溫和混合的應用。 常見用途 1.樣品混合：化學、醫學和生物學研究中，均勻混合試劑或溶液。 2.細胞培養：適合懸浮細胞（如：微生物或動物細胞）的培養。 3.萃取或溶解：用於加速溶解反應或樣品萃取。 4.酶反應或化學反應：保持反應混合物均勻分布，提高反應效率。 ...

定義 美國國家標準協會(American National Standards Institute，ANSI)將超音波定義為「頻率大於20 kHz的聲音」。在1大氣壓力下的空氣中，超音波的波長約為1.9公分。 超音波研究歷史 重要歷史年分 發現 1794年 拉扎羅·斯帕蘭扎尼(Lazzaro Spallanzani)發現了蝙蝠回聲定位能力。並以實驗摀住蝙蝠的眼睛和耳朵，證明蝙蝠是透過聽不見的聲音而不是視覺來狩獵與導航 18...