Recent Advances in Laser Ablation ICP-MS for Archaeology ab 117.49 € als gebundene Ausgabe: 1st ed. 2016. Aus dem Bereich: Bücher, Wissenschaft, Geschichte,
Recent Advances in Laser Ablation ICP-MS for Archaeology ab 117.49 € als Taschenbuch: Softcover reprint of the original 1st ed. 2016. Aus dem Bereich: Bücher, Wissenschaft, Geschichte,
Recent Advances in Laser Ablation ICP-MS for Archaeology ab 117.49 EURO 1st ed. 2016
Recent Advances in Laser Ablation ICP-MS for Archaeology ab 117.49 EURO Softcover reprint of the original 1st ed. 2016
Recent Advances in Laser Ablation ICP-MS for Archaeology ab 106.99 EURO
Desert varnish, or rock varnish, is a thin paint-like surface coating found on rocks everywhere, but more commonly in arid regions of the world. Often, this red-brown to nearly black coating covers light colored rock. This manganese-rich coating is also known to incorporate other elements. Dr. Nowinski's research-directing hypotheses were 1) "could this coating hold a record of recent air pollution, in spite of its very slow growth? and 2) "could one just pick up varnished rocks and use them to identify an area impacted by point sources of air pollution"? To answer these questions, samples of varnished rocks were collected upwind and downwind of two coal-fired power plants. Several methods were employed, including destructive laser-ablation inductively coupled plasma mass spectrometry, and, non-destructive portable X-ray fluorescence spectroscopy, to analyze these coatings for up to 26 chemical elements. The results are remarkable. They show, unequivocally, that these slow-growing coatings do hold records of recent air pollution. It is quite clear that collecting and analyzing varnished rocks can be used to assess the impact of environmental pollution from point sources.
This book is timely because of the increasing popularity of minimally invasive and cost effective methods to ablate solid tumors. Medical image guided ablation using thermal energy sources such as radio-frequency, microwave, laser, high-intensity focused ultrasound, and cyrogenics have received much recent attention as minimally invasive strategies for the ablation of tumors. This text describes novel and practical image registration methods and mathematical models to predict the cellular response from magnetic resonance (MR) images, which guide and monitor therapy. Many clinical and animal model studies seeking to characterize the biological response to thermal ablations, localized drug release, and other MRI-guided therapies would benefit from this book. This text should be especially useful for medical, engineering, applied mathematics, physics, and computer science students, researchers, and clinicians.
Local therapy with radiofrequency ablation (RFA) is an important method for treating liver tumors mostly in early stage, which has been increasingly used in recent years. RFA utilizes an RF current that is applied to the target tissue through an electrode connected with a power generator and percutaneously inserted into the tumor, the electrode power causes the tissue temperature rise required for destroying cancer cells. If RF thermal ablation entails numerous advantages - such as high repeatability of treatments, suitability for patients who can t undergo surgery, quick procedure and fast recovery -, there are still some inconveniences and difficulties coupled with this technique. One of these problems is the so called heat sink effects, resulting from the presence of large blood vessels close to the electrode tip.Finally, a comparison work has been conducted between two different ablation modalities (RF versus MW) showing similarities and differences until the conclusion that currently the RFA treatment is the most suitable treatment for tumors in early stage, small and localized.
Cancer is a complex disease that is characterized by cell proliferation (uncontrolled cell division), cell transformation and an escape from apoptosis and these properties pave the way for invasion, angiogenesis and metastasis. Additionally, cancer has also emerged as a major public health problem in developing countries. According to the World Health Organization, new cases of cancer impairment will increase with estimated death rates of up to 11 million in the year 2030. Although in recent decades much progress has been achieved in respect of therapies, like surgery, chemotherapy, radiation or hormone ablation therapy, they are not successful in more than 50% of cases. Furthermore, for those who survive the risk of reoccurrence of the disease is a major problem. Breast cancer is one of the most prevalent malignancies among women worldwide. The existing therapeutic agents for breast cancer produce several side effects. Development of specifically breast cancer cell targeting drug without any side effect to normal cells is an ongoing effort in the field of cancer drug discovery. Cytotoxic chemotherapy plays a vital role in the management of patients.