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21

Besides a lot of propaganda there is not much evidence that high fructose corn syrup (HFCS) is more dangerous than normal sugar. Lets have a look at the sugar in detail: HFCS is produced from corn and is originally a glucose syrup. Since fructose is obviously much sweeter, the glucose is converted enzymatically into fructose (see here for more details). ...


20

Well, the answer by @An J has already explained the prima facie of your question which is: sperms need lower temperature for development. But I will be explaining in my answer: Why do the sperms actually need a lower temperature for their development? This is a debatable subject, but there have been several models or hypothesis about this. I found this ...


18

Overview. This is a very interesting question. The ideas behind this have been around for a while and the methods are covered in great detail elsewhere. The overall answer to the hypothetical question is rather surprising. There may be actually potential benefits to perpetual liquid ventilation for people with certain diseases. Trials so far have not found ...


13

Bee, or other insect stings/bites, will cause a reaction to occur due to chemicals being released from your immune system. This can result in anywhere from a small bump to anaphylaxis, which can be life-threatening if not treated right away. From Southern Cross Medical Library: An anaphylactic reaction occurs when the body's antibodies respond to the ...


12

The following study abstract of "Consumption of high-fructose corn syrup in beverages may play a role in the epidemic of obesity" copied from http://www.ncbi.nlm.nih.gov/pubmed/15051594 seems to address your question. I added a paragraph break; the second paragraph seems most relevant to me: Obesity is a major epidemic, but its causes are still unclear. ...


10

Yes, they do. For a look at survival of Lactobacillus and other bacterial species after multiple freeze/thaw cycles, check out Harrison 1955 (below). The awesome hand-drawn graphs show that many bacteria survive after being frozen for 11 weeks. There's also a figure on the following page showing that many bacteria also survive after multiple freeze-thaw ...


9

This is at best anecdotal evidence. First of all, urine is, although it has been thought otherwise for decades, not sterile. The bacteria in it just don't grow under the conditions used in the lab which are used to proof bladder infections. See these two articles: Evidence of uncultivated bacteria in the adult female bladder. Urine is not sterile: use of ...


9

In addition to the cracks providing a better place for bacteria to grow, all plastic bottles, when reused, are subjected to high levels of bacteria due to contact with hands and mouths. So your water bottle can potentially host a range of bacteria. Your water bottle traps humidity inside and provides a perfect growing medium, especially near the threads of ...


8

Let's first clarify some concepts. Free fatty acids, including palmitic acid, are not present in animal tissues (or in the diet) to any large extent; they are esterified with glycerol to from triglycerides (fat), which is the storage form. This is a very important distinction, because triglycerides are chemically inert molecules that can be stored in very ...


7

The yellow color comes from the accumulation of Bilirubin in the body. Bilirubin is a breakdown product of hemoglobin (contained in erythrocytes, also known as red blood cells, and responsible for the oxygen transport in the body). (This is also the reason why bruises get colored, as the blood which was released into the skin gets removed.) As erythrocytes ...


7

I am pretty sure that it is a moldy core rot which would be caused by a fungus that infects the apple during the flowering stage. The fungi is also referred to as "apple fuzz". From SF Gate fungus sometimes does enter apples at the blossom end and damage the core, especially if weather is wet, a condition called "moldy core," From PennStateExtension ...


7

A mature human sperm has some mitochondria, a nucleus, an acrosome, and a flagellar apparatus. That's it. Because of the lack of other organelles in the sperm, they have to be kept in a kind of 'cold storage' so that they are viable for at least some time (usually a couple of days). The ideal temperature would be 1.8 °C to 2.5 °C below normal body ...


6

Fructose has a special characteristic that other sugars do not have: its absorption in the human intestine is not regulated, as opposed to glucose, for example. The important implication is that all the fructose you consume will end inside your organism, either used immediately or stored as fat. Other sugars will only be partly assimilated, or will require ...


6

For this answer I assume that we are talking about sleep in healthy individuals as well as fainting as an isolated event without underlying disease or injury. The most common form of what we call "fainting" is vasovagal syncope. It is caused by a drop in blood flow to the brain (cerebral hypoperfusion) e.g. by (false) activation of the parasympathetic ...


6

I'm not sure I agree with that, but if I had to support that assertion, I would say that while patients with COPD, CHF and neurodegenerative diseases may die of hypoxia (no fever there), patients with cancer more often die of opportunistic infections. In patients being treated with chemotherapy (and for some time afterwards as well), myelosuppression - that ...


6

True enough the re-usability of plastic bottles is quite a problem even in the area I live. This is due to multiple factors; one of those factors is the symbiotic microorganisms that could be living in your mouth (from my lectures) as well as any contaminant from anything you've eaten$^1$. That however isn't the only thing that could be contaminating your ...


6

These types of reactions in pharmacology in general are called paradoxical effects. The main effect of alcohol on the CNS is the potentiation of GABA receptors. GABA receptors are (mostly) inhibitory receptors in the CNS, so potentiation of GABA receptors mostly decreases brain activity by increasing inhibition. However, you can distinguish between neural ...


6

It's well known that obese patients have slower wound healing, but the specific cause isn't known; most likely there are multiple causes acting together. The correlation between obesity and deficient wound healing has long been established. ... Substantial evidence exists demonstrating that obesity is associated with a number of postoperative ...


5

The reason for laser hair removal/growth products not being safe for darker skin tones is the ability for darker skin tones to absorb more light from the laser than lighter skin does BEFORE the light is able to reach the depth at which the hair follicle is located. Light from lasers must pass through the epidermis where melanocytes are located before they ...


5

Iodine is naturally found in sea water and soil but it is not evenly distributed, with many areas in the world with low levels of iodine. Iodine accumulates naturally in fish, and plants growing in iodine-rich soil. Mammals that eat these plants get iodine from them, which then accumulates in the milk, making dairy and its products (e.g. cheese) another ...


4

WHO's definition about Health Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity. In other words, Good health means active life where you can express yourself freely, you can succeed and can make mistakes, can reach your goals, can understand your body and others, and can say no when ...


4

Addition to the previous answer First you need to understand how radiation causes cellular damage. EM waves like γ-rays, X-rays and high-energy UV (in certain molecules even visible light) can knock out the electrons from the atom and create an ion and free radicals by breaking chemical bonds. This term — ionizing radiation is not used for low energy UV ...


4

There is a correlation between the heartbeat and the life expectancy as you can see below. (source: medcan.com) This relationship is not linear (the y-axis is on a logarithmic scale) and is negative, that is, the faster is the heart beat, the lower is the life expectancy. You'll note the outlier (human) that has a life expectancy that is twice as high ...


4

Both pasteurisation and irradiation work by killing micro- (and macro-) organisms in food. The two processes are broadly similar and in both cases the objective is to reduce the number of bacteria or other microorganisms in the food rather than completely sterilise it. Due to this and other similarities food irradiation is sometimes called cold ...


4

Short answer We do not loose fat (cells) as we age; on the contrary - we tend to gain fat by about 1 or 2% per decade. The place where it gets stored does change; instead of going into subcutaneous regions, it gets stored around the abdomen. A sex hormone imbalance might be the cause of this gain in visceral fat. Background What a coincidence! I just ...


4

The causative agent of the plague, Yersinia pestis, can be indirectly (via a flea vector) or directly (via exposure to infectious fluid or a bite) transmitted by rodents. In the western United States in particular, Y. pestis is endemic, and ground squirrels, prairie dogs, chipmunks, and woodrats are important reservoirs (see Cecil Medicine Ch. 320). US ...


4

According to Endometriosis: benign, malignant, or something in between? (PubMed, 2017), endometriosis is not considered cancerous because: Does not appear as an expansille tumor mass Is not destructive The cells in the lesions are normal, like in the uteral endometrium Is not lethal Immunotherapy of endometriosis is in the experimental phase - you can read ...


4

The most obvious issue is exposure to radiation. Once you're beyond the earth's atmosphere and magnetic field you are exposed to much higher levels of radiation from cosmic rays and solar flares. It's also possible that microgravity (weightlessness) could have effects on the reproductive system, but this isn't well studied yet. However, given the source you ...


3

usually the growth of bacteria is slowed down as they are in freezing temperature and they almost carry out no metabolic reaction at this stage.but another problem occurs that is ice crystals formation which disrupts or pierce the bacterial cell wall causing the death of bacterial cells,this problem can be solved by adding glycerol or any other ...


3

I commented above that it will depend heavily on at what pace you drink your rum, but in short, no, no you cannot. If you do it quickly, you'll die of alcohol poisoning, and if you drink it slowly, you'll probably die of dehydration[1]. io9 summed up some research a few years ago, the majority of which is largely bunk. One study (ncbi, free pdf) however, ...


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