BVP Medical

Combinations of ResistorsResistors do not occur in isolation.  They are almost always part of a larger circuit, and frequently that larger circuit contains many resistors. It is often the case that resistors occur in combinations that repeat.Goals  Series Combinations of Resistors : Two elements are said to be in series whenever the same current physically flows through both of the elements. The critical point is that the same current flows through both resistors when two are in series.  The particular configuration does not matter.  The only thing that matters is that exactly the same current flows through both resistors.  Current flows into one element, through the element, out of the element into the other element, through the second element and out of the second element.  No part of the current that flows through one resistor "escapes" and none is added.  This figure shows several different ways that two resistors in more...

Odds are that if you check your purse or wallet right now, you'll find an invention that owes its existence as much to a desire for neatly pressed clothes as a need for portable data storage—the magnetic stripe card. Conceived by IBM engineer, Forrest Parry, as part of a government security system project, the technique of attaching a strip, or "stripe," of magnetic tape to a card facilitated a revolution in portable, personal data retrieval. Until the advent of the chip-based smart card during the 1980s, the magstripe ruled—from club membership cards, through to phone, credit, and debit bankcards. Parry had experienced several frustrating failures with trying to fix the magnetic material to the card with adhesive. When a forlorn-looking Parry returned home from the laboratory, his wife, who was ironing at the time, stepped in and suggested she try using the heat of the iron to bond the magstripe more...

Non Communicable Diseases  A non-communicable disease, or NCD, is a medical condition or disease, which by definition is non-infectious and non-transmissible among people. NCDs may be chronic diseases of long duration and slow progression, or they may result in more rapid death such as some types of sudden stroke. They include autoimmune diseases, heart disease, stroke, many  cancers, asthma,diabetes,  chronic  kidney disease, osteoporosis,Alzheimer's disease, cataracts, and more. While sometimes (incorrectly) referred to as synonymous with chronic diseases, NCDs are distinguished only by their non-infectious cause, not necessarily by their duration. Some chronic diseases of long duration, such as HIV/AIDS, are caused by transmittable infections. Chronic diseases require chronic care management as do all diseases that are slow to develop and of long duration. You will get friendly to this topic by clicking http://www.studyadda.com/videos/ix-class-biology-lectures/why-do-we-fall-ill/non-communicable-disease/1765Video Lecture Taught By-  Mrs. Shweta Sardana, Msc.,M.Phil Gold Medalist , AIPMT TrainerSardana Tutorials ï»¿ï»¿

 Modes of transmission OR Means Of Spread Of Communicable Diseases:Once an infectious agent leaves a reservoir, it must get transmitted to a new host if it is to multiply and cause disease. The route by which an infectious agent is transmitted from a reservoir to another host is called the mode of transmission. It is important for you to identify different modes of transmission, because prevention and control measures differ depending on the type. Direct modes of transmission Direct transmission refers to the transfer of an infectious agent from an infected host to a new host, without the need for intermediates such as air, food, water or other animals. Direct modes of transmission can occur in two main ways:

• Person to person: The infectious agent is spread by direct contact between people through touching, biting, kissing, sexual intercourse or direct projection of respiratory droplets into another person’s nose more...

The electrocardiograph—also known as EKG or ECG— is an instrument designed to record minute electric currents generated within the heart, which are used to diagnose different types of heart disease. At the end of the nineteenth century, physiologists understood that beating hearts produced electrical currents, but they could only measure them by placing electrodes directly on heart muscle. Dutch physician and physiologist Willem Einthoven (1860-1927) adapted the string galvanometer for use in cardiology. String galvanometers had first been used to amplify electrical signals transmitted along undersea cables. Einthoven's galvanometer, which he produced in 1903, consisted of a microscopic thread of quartz known as a "string" that was vertically suspended in a strong magnetic field. When minute currents passed through the string it deflected and obstructed a beam of light, allowing the shadow to be recorded on photographic paper. Early prototypes were unwieldy—weighing 600 pounds (272 kg), they needed to be more...

In this video Mr. Lalit Sardana(IIT-JEE AIR 243) an IITJEE trainer will be explaining you some topics like chain isomerism, position isomerism, functional isomerism, function isomerism, optical isomerism, metamerism in amines. He has done a lot of things that are above the call of duty. This video is useful for students appearing in 11th CBSE, 12th CBSE exams and for the students appering in the competitive exams like JEE Mains, JEE Advanced, VITEEE, WBJEE, KCET, J and K Engineering, MPPET, AIPMT. Watch the videos related to Isomerism in Amines through the following link http://www.studyadda.com/videos/jee-chemistry-lectures/amines/isomerism-in-amines/1432 

Amines are aliphatic and aromatic derivatives of ammonia. Amines, like ammonia, are weak bases (K b = 10 −4 to 10 −6). This basicity is due to the unshared electron pair on the nitrogen atom. Classification and nomenclature of amines Amines are classified as primary, secondary, or tertiary based upon the number of carbon‐containing groups that are attached to the nitrogen atom. Those amine compounds that have only one group attached to the nitrogen atom are primary, while those with two or three groups attached to the nitrogen atom are secondary and tertiary, respectively. Primary amines  In primary amines, only one of the hydrogen atoms in the ammonia molecule has been replaced. That means that the formula of the primary amine will be RNH2 where "R" is an alkyl group  Secondary amines  In a secondary amine, two of the hydrogens in an ammonia molecule have been replaced by hydrocarbon groups. At this more...

 In this video Mr. Lalit Sardana(IITJEE AIR 243) is explaining students about Hydrolysis of Chloroform which comes under Haloforms. This video is useful to the students appearing for 11th CBSE, 12th CBSE exams and competitive exams like IIT JEE, AIEEE, VITEEE, AIPMT, AFMC, EAMCET, WBJEE, KCET Engineering. Watch the videos related to the hydrolysis of chloroform through the following link http://www.studyadda.com/videos/jee-chemistry-lectures/haloforms/hydrolysis-of-chloroform/1430  

The Hofmann rearrangement is the organic reaction of a primary amide to a primary amine with one fewer carbon atom. By this method the amide (–CONH2) group is converted into primary amino (– NH2) group.   R - CO - NH2 + Br2 + 4KOH → R - NH2 + 2KBR + K2CO3 + 2H2O                 Amide                             Pri-amine      This is the most convenient method for preparing primary amines.   This method gives an amine containing one carbon atom less than amide. The reaction is named after its discoverer: August Wilhelm von Hofmann. This reaction is also sometimes called the Hofmann degradation or the Harmon Process, and should not be confused with the Hofmann elimination.   The reaction of bromine with sodium hydroxide forms sodium hypobromite in more...

Acetylene (systematic name: ethyne) is the chemical compound with the formula C2H2. It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in pure form and thus is usually handled as a solution. Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities. As an alkyne, acetylene is unsaturated because its two carbon atoms are bonded together in a triple bond. The carbon–carbon triple bond places all four atoms in the same straight line, with CCH bond angles of 180°. Since acetylene is a linear symmetrical molecule, it possesses the D∞h point group. Reaction with silver powder: On heating with silver powder, chloroform forms acetylene. Mr. Lalit Sardana (IITJEE AIR 243) is an IIT JEE educational trainer who has been teaching students since past many years. He is an experienced more...