Distinguishing the Polarity and Type of the Reaction
1. ** Identification of feedback pole ** - ** Instantaneous Polarity Method **: First, specify the pole of the circuit input signal to the ground at a certain time, and then judge the pole of each relevant point in the circuit step by step, so as to obtain the pole of the output signal. The feedback signal's pole is determined according to the output signal's pole. If the feedback signal increases the net input signal of the basic amplifier circuit, it means that positive feedback is introduced; if the feedback signal reduces the net input signal of the basic amplifier circuit, it means that negative feedback is introduced. Here, it should be noted that when using the instantaneous polar method to determine the potential pole of each point of the circuit, it is necessary to master the determination of the three basic connection methods (configuration) and the phase relationship of the corresponding configuration output signal voltage. - ** Same-point connection judgment method **: If the output end of the feedback branch is connected to the input end of the amplifying circuit signal at the same point, and the instantaneous change is the same, then the feedback is positive feedback, otherwise, it is negative feedback. 2. ** Identification of feedback type ** - ** Judging current feedback or voltage feedback from the output end ** - ** Method 1 **: Set the output voltage to 0 (ground). If the feedback is also 0, it is voltage feedback; if the feedback is still there, it is current feedback. - ** Method 2 **: Set the output current to 0 (open circuit). If the feedback disappears, it will be current feedback; if the feedback still exists, it will be voltage feedback. It could also be quickly judged that if the feedback came from the output end or the output voltage dividing end of the amplifier circuit, it would be voltage feedback, and if it came from the non-output end, it would be current feedback. - ** Judging from the input end whether it is a series feedback or a parallel feedback ** - Series feedback: The input signal and feedback signal are superimposed by voltage, which can be quickly judged by the input and feedback at different ends. - Parallel feedback: The input signal and feedback signal are superimposed as a current, which can be quickly judged by the input and feedback at the same terminal. Read more exciting novels for free
Distinguishing Fever Reaction and Hemolytic Reaction
Fever usually occurred within 1 - 2 hours after blood transfusion. It was often accompanied by chills or chills, followed by high fever. The body temperature could reach 39 - 40 ° C, accompanied by skin flushing and headache. Most of the blood pressure did not change. The symptoms lasted for less than 10 minutes and relieved after 1 - 2 hours. Some patients might be accompanied by nausea, vomiting and other symptoms. Most hemolytic reactions were caused by the transfusion of abnormal blood. The typical symptoms were shock, chills, high fever, difficulty breathing, back pain, precordium pressure, headache, hemoglobinuria, abnormal bleeding, and so on, which could lead to death. The only early signs of surgery patients under anesthesia were wound bleeding and low blood pressure. Compared to hemolytic reactions, fever reactions during blood transfusion were usually milder, but hemolytic reactions were more serious and even life-threatening. In addition, from the mechanism of the fever reaction, it was different from the hemolyzed reaction. The hemolyzed reaction was an acute immune transfusion reaction caused by the reaction of the transfused red blood cells (a few of which were the red blood cells of the recipient) with the corresponding red blood cell allo-antigen-like body of the recipient. In terms of treatment, there were also differences between the two. Blood transfusion should be stopped immediately for fevers, and heat preservation should be given when shivering, and fever should be treated with antipyretic treatment. For hemolytics, more complicated and urgent treatment measures should be carried out according to the specific situation, such as dealing with possible serious consequences such as shock and acute kidney failure. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the reaction type of the fermentation reaction of carbolic acid?
Carbonic acid could not undergo a dehydration reaction, but only an ionisation reaction. Its ionisation equation was H <anno data-annotation-id ="0000008 - 4000 - 4000 - 8000 - 9000 - 90000000000"></anno></anno> COH + HCO (mainly based on the first step of ionisation). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the reaction type of the reaction between fluorin and aluminum?
The chemical equation for the reaction between aluminum and fluorin was 2AI +3F2 = 2AlF2. This was a chemical reaction because two substances (aluminum and fluorin) reacted to form one substance (aluminum fluorin). As for the pictures and videos of the reaction, they could not be provided. It was recommended to search for the reaction of aluminum and fluorin through the search engine. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Cyclohexene Formation Reaction Type
Cyclohexene was converted to hexene, and the reaction type was an oxidization reaction. For example, excessive amount of acidic potassium Permanganate could be used to catalyze the synthesis of hexene to produce hexanic acid. Cyclohexene could also be synthesized into hexanic acid under the presence of an Iridium catalyst. Cyclohexene could be directly synthesized into hexanic acid by hydrogen peroxid in the presence of a phase transfer catalyst and a tungsten acid catalyst. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Type of Acid Anhydrides
The reaction between the acid and the acid would produce an ester, but this reaction could not be called an esterfication reaction. Esterification was a reaction between alcohol and acid to form ester and water, and although the reaction between the acid and the ester was not an alcohol, it was not an ester reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Type and Formula of Magnesia and Dilute Sulfuric Acid Reaction
The reaction type of Magnesia (Magnesia) and diluted sulfuric acid (H <2> SO2) was a metathesis reaction. In the metathesis reaction, two compounds exchange their components to form two other compounds. The reaction of sulfuric acid and calcium dioxide will produce sulfuric acid and water. The reaction equation is: Magnesia + H ^SO2 ==== MagnesiumSulphate + H ^O. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the reaction type of the reaction between sulfur and titanium dioxide?
The chemical equation for the reaction between sulfur and titanium dioxide is: <anno data-annotation-id ="0000000 - 4110 - 4000-a150-a160-a1511111000"></anno></anno></anno>ZnS+SO_2\)。The reaction phenomenon was the production of a pungent odor gas (sulfur dioxide was a pungent odor gas). This reaction was a type of oxido-reduction reaction. In the reaction, the valency of sulfur changed from 0 to +4 (forming SO2) and-2 (forming SnS). The valency of the oxygen and the valency of the zinc-based metal did not change. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Changing Law of the Reaction Type of the Reaction Between the Acid and the Acid
The reaction between the two was carried out in two steps: the first step was to form the first step, and the second step was to further react the first step with the second step to form the second step. With the formation of the sulfuric acid, a eutectic mixture of NH4Cl4, NH4HSO4, and (NH4) 3H (SO4) 2 was formed, making the reaction difficult. Increasing the reaction temperature and prolonging the reaction time were beneficial to increasing the conversion rate of the aminium chloride-like substance and reducing the content of the chloride-like substance in the aminium sulfate-like substance. This reaction has a good application prospect in areas where there is an excess of hydrogen chloride-sulfuric acid and hydrogen chloride-sulfuric acid. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Diels-Alder reaction formation type
The Diels-Alder reaction was a [4+2] cycloaddition reaction between a Conjugated Diene (Diene) and a Substituted Alkene (Dienophile). It could produce Cyclohexene or 1,4 -Cyclohexadiene, which could be used to synthesize six-membered rings. It could also be used to synthesize chirally pure ten-membered ring compounds. In the research of new self-healing transparent plastic materials, the reaction could also form long chains of the compound. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Type of Magnesium and Copper Oxides
The chemical equation of the reaction between copper dioxide (CuO) and lithium is: In this reaction, a simple substance (lithium) and a compound (copper) react to form another simple substance (copper) and another compound (lithium), which meets the definition of a displacement reaction, so this reaction type is a displacement reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>