detectors, such as the quartz crystal microbalance (QCM).[5] In first approximation cantilevers behave like a harmonic oscillator, and the mass change on a rectangular cantilever will produce a reduction on the resonance frequency, which can be estimated from:
where f0 and f1 are the fundamental resonance frequency before and after the mass adding, respectively.
Recent studies have demonstr
I. 서론
전하를 갖는 물질을 직류전기장에 놓으면 그 물질의 전하, 분자의 크기 및 모양 등에 따라 각각 하전 된 입자가 양극 또는 음극 쪽으로 특유의 이동을 한다. 이와 같은 현상을 전기영동(electrophoresis)이라 한다. 이동 정도의 차이에 의하여 물질의 분리 또는 순도를 검정하는 방법을 전기영동
Ⅰ. 서론
고대에서 근대의 과학혁명을 거치면서 과학은 눈부시게 발전해왔다. 각 분야별로 수많은 업적과 법칙을 만들어내며 이제 과학이 인류의 생활에 하나의 학문으로서 자리매김해왔다. 그런데 현대에 들어와서 이러한 과학의 진정한 의미에 대해 심도 있게 고찰, 논의하는, 사람들에게‘과학학
Single Nucleotide Polymorphism (SNP)
DNA sequence variation occurring when a single nucleotide –A, T, C, G- in the genome (or other shared sequence) differs between members of a biological species or paired chromosomes in an individual.
Variations in the DNA sequences of humans can affect how humans develop diseases and respond to drugs, pathogens, vaccines, chemicals, and other agents.
Box1. 혈중 종양세포의 정량
혈중 종양세포(circulating tumor cells, CTCs)의 개수는 종양 전이의 민감한 생체지표이다. 따라서 CTC 정량은 암을 진단하고 단계를 판별('staging')하는데 그리고 잔존질환이 있는지를 조사하는데에 유용한 방법으로 떠오르고 있다. 이러한 임상적 중요성 때문에, 이 떠오르는 기술은
In synthetic luminol process we need luminol’s precursor. That is
5- nitrophthalhydrazide. It is synthesized by the reaction of 3-nitrophthalic acid
with hydrazine. This process is condensation reaction. First, hydrazine(N2H4) is
heated with the 3-nitrophthalic acid. This reaction is most conveniently carried
out in the high-boiling solvent triethylene glycol. To boil off excess water, t
detecting of hemoglobin
Criminalists mix the luminol (C8H7O3N3) powder with a liquid containing hydrogen peroxide
(H2O2), a hydroxide (OH-) and other chemicals, and pour the liquid into a spray bottle. The
hydrogen peroxide and the luminol are actually the principal players in the chemical reaction,
but in order to produce a strong glow, they need a catalys
Detecting Receptors on Cancer Cell’s Surface
The receptors, which is important to cancer targeting, exist not only on the cancer cell’s surface but also on the normal cell’s surface. So we have a potential to mis-treatment.
So, we focused on overcoming of these drawbacks. To overcome these side effects we considered two things.
1. Nano-sized particle
Nano-sized particle is the metho
ToolsThe MBE growth can be monitored in real-time using a Reflective High Energy Electron Diffraction (RHEED) system. The system includes an electron gun which directs an electron beam towards the substrate at a shallow angle (1-2°), and a phosphor screen which detects the diffracted beam.
As the substrate surface varies (from rough to smooth) so does the pattern detected at the screen.