Argon ion polishing is a fine polishing sample preparation technology. It has a wide range of applications in materials science, petroleum geology, etc., especially for samples with uneven hardness and hardness. It has a very good polishing effect and has a fast processing speed. You can choose the position we need to observe for spot polishing. Nanoscale polished sections and planar samples were obtained for electron microscopy observation and analysis. This lecture shows some experimental results of argon ion polishing technology in petroleum geology, and elaborates on the preparation and concern of the current popular shale gas samples, hoping to promote the development of shale gas and argon. The application of ion polishing technology in this respect. Q Q Q Q Q Q Q Q Q Q Leica EM TIC 3X Triion Cutting / Polishing Machine
Palatin Technologies Inc. (NYSE: PT-141) announced today that it has shown positive results in a Phase I clinical trial of pT-141 for the treatment of sexual dysfunction in normal premenopausal women.
The trial included 32 healthy female volunteers and evaluated their response to pT-141 and placebo in response to visual stimuli. Pt-141 was found to be safe and resulted in a significantly greater improvement in vaginal blood flow than placebo users (P< 0.05).
role
Such antibiotics first affect the outer membrane of sensitive bacteria. Drug ring part of polypeptide amino and lipopolysaccharide in the outer membrane 2 valence cations combining site to produce electrostatic interaction, destroy the integrity of the outer membrane damage, fatty acid part of drugs to penetrate the outer membrane, thus increase the permeability of cell size, lead to intracytoplasmic phosphate, nucleosides and other small molecules to escape, straight die cause cell dysfunction. Gram-positive bacteria do not respond to such antibiotics because they have a thick cell wall that prevents drugs from entering the bacteria.
Pt141 Powder,Bodybuilding Ipamorelin,Sermorelin Powder,Weight Loss Peptide Shaanxi YXchuang Biotechnology Co., Ltd , https://www.peptidenootropics.com
Excerpts from the wonderful questions and answers are as follows:
What is the difference between gold spray and carbon spray? What is the difference between applications?
A: Carbon spray and gold spray are common methods, in order to eliminate the charging effect when scanning electron microscopy observation of non-conductive samples. Gold spray is mainly used for morphological observation, while carbon spray is usually used when energy spectrum analysis is required, otherwise the gold signal will mask the spectrum signal of the sample.
Does Leica's argon ion polisher need to be frozen in polished shale?
A: Leica's argon ion beam polisher usually does not need to be frozen, mainly because its three-ion beam efficiency is relatively high, the sample stage can not swing during polishing to ensure effective heat conduction; there is automatic control setting It can be alternately polished with high and low pressure to reduce heat deformation. Of course, Leica's argon ion polishing equipment can also be equipped with a freezer if needed, and works better at -150 °C.
Teacher Gu, can you recommend a local quality introductory tutorial?
A: "Ordinary Geology", if you are interested, you can pay more attention to geological phenomena and learn more about petrology and mineralogy.
The local temperature of Leica's argon ion polisher during polishing is generally high. Does it consider the thermal evolution of organic matter at high temperatures?
A: The local temperature may exceed 100 °C during argon ion polishing, but the polishing is to sputter off the atoms, the action time is very short, the heat is instantaneously dispersed; the other is that the thermal evolution of organic matter needs to exceed 250 °C or higher. Degradation, therefore, argon ion polishing techniques generally do not require consideration of the effects of thermal evolution and can be equipped with a frozen sample stage if desired.
Do EDS, C and O are not very accurate?
A: Inaccurate, the resolution of the energy spectrum EDS is about 126eV, while the peak positions of C and O are relatively low, 0.277eV and 0.525eV respectively. Here, it can only be distinguished whether it exists, but the quantitative is not.
Is argon ion polishing suitable for sandstone?
A: Argon ion polishing is a suitable material for cutting hard, soft, porous, heat sensitive, brittle and/or heterogeneous multiphase composite materials with high quality cutting cross section suitable for scanning electron microscopy. (SEM) micro-area analysis (energy analysis EDS, spectral analysis WDS, Auger analysis Auger, backscatter electron diffraction analysis EBSD) and atomic force microscopy (AFM) analysis.
Observing shale, how can the energy spectrum be played at low voltage?
A: There is no way to do spectrum analysis under low voltage. Usually, shale pore observation is performed at low voltage. At the high voltage, the same area is found according to the marker points for energy spectrum analysis, and then the two are corresponding. However, if you are familiar with the sample, you can determine the mineral type (such as clay minerals) by combining the morphology on the backscattered image.
Hello, Teacher Gu, I am a professional magnesium alloy. I am making an aluminum-magnesium composite interface. Is the calibration rate of aluminum-magnesium composite interface deformation etched by argon ion polishing?
A: Yes, argon ion polishing is currently the best EBSD preparation method. Conventional mechanical polishing is not possible, and electrolytic polishing and vibration polishing are also difficult to control conditions, and argon ion polishing is a physical polishing, which is almost universal.
What is the difference between Fib and Tic applications?
A: Focused ion beam (FIB) and three ion beam milling (TIC) are similar, but different levels of equipment. Both are ion beams, but FIB is a focused Ga ion beam and TIC is an argon ion beam. FIB can only be used to cut a few tens of micrometers. The disadvantages are obvious, the area is small, and the liquid Ga ion source has obvious ion implantation effect on sample processing. The advantage is that it can utilize its own imaging function (resolution is better than 5nm). Accurate positioning of the cutting area; TIC, mainly using the argon ion beam to ion bombard the sample, sputter the sample atoms out, because the argon ion beam spot diameter can reach about 1mm, the processing area is very large, ion beam cutting A 1x4mm area is available, ion beam polishing up to 25mm area, and argon is an inert gas with no ion implantation effect, so it is very advantageous for subsequent SEM/EBSD/AFM analysis. However, FIB has other very powerful functions for 3D reconstruction analysis and accurate preparation of TEM samples.
May I ask Teacher Gu, what kind of spectrometer is used to distribute the pictures of each element? What is the magnification?
A: Our energy spectrum is based on the Oxford Instruments X-Max 80, and other manufacturers are similar. The magnification is set as needed. Usually the resolution of the spectrum is 1μm. If you do EDS mapping, it will be higher.
Leica related equipment 
Leica College | Application of Argon Ion Polishing in Petroleum Geology--An Excerpt from Wonderful Questions and Answers