What Is This Substance

Could anyone tell me what this substance is?

It looks like mould. It happens when you have ventilation issues and the humidity is rather high.Option 1:Run a fan to blow air towards the window. Leave the window open to ensure airflow is not obstructed. This would prevent further mould from growing, might reduce the mould population but might take a long time to be mould free.Option 2:As the rest of the readers advised, drown it in bleach. Since it seems that it is suspended, you might want to put some cloth beneath the area for dripping bleach.You might even experience pieces of the ceiling dropping down. The place looks a bit aged.Option 3:There’s this non-poisonous chemical called BV 20EW that actually kills fungus, bacteria and viruses and hence, kills moulds too. A healthy application to the affected area would do the job within 2 to 3 applications. The concentrate can be diluted 100x but it’s quite pricey. A liter would set you off about USD200 excluding postage.One application per day would suffice.

What is the most deadly substance to humans?

Dimethylmercury - not sure this is the most deadly, but it certainly ranks high up on the list.It has a slightly sweet smell, but inhaling enough to detect the odor is hazardous. It passes through latex, PVC, and neoprene within seconds and is absorbed easily by the skin. This ability for the substance to pass through protective equipment so readily makes it extremely dangerous.To highlight just how dangerous this substance is, we can look to the story of Dr. Karen Wetterhahn of Dartmouth. She had been working with dimethylmercury in her research of toxic metals. She recalled spilling one or two drops onto her glove, and carried out standard cleaning/safety procedures prior to removing her protective gear. It should be noted that she had taken all recommended safety measures in working hazardous substances. Approximately three months later, Wetterhahn noticed abdominal discomfort and significant weight loss. Soon, the classic neurological symptoms of mercury poisoning appeared and she was admitted to the hospital. Three weeks from the start of neurological symptoms, "Wetterhahn lapsed into what appeared to be a vegetative state punctuated by periods of extreme agitation"[1]. She died less than a year after the initial exposure.To further demonstrate how deadly dimethylmercury is, the peak blood mercury levels peaked at 4000 micrograms (80x the toxic threshold). 4000 micrograms is roughly 0.004 grams or 0.00460 grams/litre of blood. Assuming she had the average amount of blood, 4.7 litres, the amount of dimethylmecury that was absorbed by her skin was: 4.7*0.0046 = 0.0216 grams or 2.16 milligrams.It takes 2.16 milligrams of dimethylmercury to kill an adult human in less than a year, in which three-four months are filled with rapid neurological degeneration.[1] Karen Wetterhahn

What is the melting point of a pure substance?

The purest substance known to humans, unicorn blood, melts at 250 K. The next purest substance are mermaid tears, which decomposes quickly in water so it’s quite hard to detect. However, none of the samples obtained were sufficient enough to conduct experiments on its physical properties and chemical composition.Kidding aside, the melting point depends on the substance’s chemical composition and its intermolecular bonds. Essentially, the melting point is the temperature where a substance transitions from solid to liquid. Otherwise, please be more specific and say which substance you want to know the melting point of. A pure substance’s melting point can range anywhere from 0 to infinite Kelvins, because we don’t know what pure substance you’re specifying. Also, a quick Google search along the lines of “what is the melting point of _______” will also give you the answer.

What is the name of the thick substance that we cough out of our throat when we have cold?

It’s called Phelgm.

When we have a cold and cough, a thick substance comes out of our mouth. What is this substance made of? Where is it stored in our body? Why does it come out only when we have a cold?

this is called KAPHA in Ayurvedic language Mucus inmedical language and is stored in lungs and above area lungs throat and brain.It is called sinusitis in medical languageSinusitis is treatable up to a point where one may say it is cured. This is due to the fact that sinusitis may be a result of an untreated cold or flu virus which usually invades our bodies around the winter months. Untreated allergies which are usually unavoidable (due to tiny allergy creating particles floating around in the air) can also result in a person experiencing sinusitis.If mucus is not spitted (Usually people SWALLOW mucus.) This SWALLOWED mucus gets mix with Pita (bile). As mud spoils the things on which it is thrown. It wraps the food intakes disturbing the Agni (digestion fire). …. Sometime Acidity too leads to sinus, just like there is rain after volcano causing slippery mud. Usually Chronic acidity leads to sinus due to indigestion natural process of curing extra Kapha (mucus) gets disturbed leading to sinus.