with us. our biggest hour of cnn news central starts right now all right. new york times, maggie haberman says donald trump is prepared to go after president biden on hunter. biden cnn s historic debate. now, just a week away, new details on the final preparations. that s ahead. plus were standing thing by for a possible a huge supreme court decision. many decisions major questions involving trump s immunity and of course, abortion rights unlinked the line and repeatedly reckless with guns, how prosecutor planning to go after alec baldwin, kate bolduan, out today. i m sarah sided with john berman. this says cnn news central just one week to go until the first presidential debate here on cnn no general election debate has ever been this early or potentially this important. and we re you are getting details on how the candidates are getting ready. president biden is headed to camp david. we re told that donald trump is talking to his vice presidential hopefuls, outside alli
On the 4th of this month, the 2023 Nobel Prize in Chemistry was officially announced. Unfortunately, a substantial leak of the laureates list before the official announcement has diverted attention from the specific research behind this year s award. As a dedicated student of chemistry, I cannot help but feel a sense of disappointment.
Bismuth therapy has shown efficacy against two majors gastrointestinal disorders: peptic ulcer disease and diarrhea. It is as effective as the H2-receptor antagonists in peptic ulcer disease, costs considerably less, and offers a lower relapse rate. Bismuth is also used to relieve the symptom of an upset stomach, such as heartburn and nausea in adults and teenagers. This medicine is available without a prescription. It works by decreasing the flow of fluids and electrolytes into the bowel, reducWhat is Bisthmuth?Bisthmuth is a dark gray or black powder composed of nearly spherical particles of bismuth of under 100nm in diameter; bismuth powders see usage in various fields, including manufacturing, metallurgy, and countless specialty applications. Large doses can become fatal. Industrially it is considered one of the little toxic of the heavy metals. Bismuth salts also make like an antacid to treat problems such as indigestion. Bismuth might also speed up blood clotting. People commonly
To be able to exploit the advantages of elements and their molecular compounds in a targeted manner, chemists have to develop a fundamental understanding of their properties. In the case of the el .
The development of free-cutting steel is inseparable from the development of environmentally friendly alloy elements and the control of inclusions shape. Alloying elements can affect the composition, morphology, size, and distribution of inclusion, which are the main factors affecting the machinability of free-cutting steel. This study selected sulfur free-cutting steel with different chemical compositions as the research object to examine the effects of bismuth and bismuth tellurium on sulfur-containing free-cutting steel through electrolytic corrosion experiments, metallographic microscopy, scanning electron microscopy, energy spectrum, and electron backscattering analyzer. The results showed that the microstructures of free-cutting-steel containing sulfur, free-cutting steel containing sulfur bismuth, and free-cutting steel containing sulfur bismuth tellurium are composed of ferrite, pearlite, and inclusions. The inclusions in sulfur-containing free-cutting steel are chain, cluster,