What causes dendridic snoflake growth?
476288
for a crystal to form it needs to grow off of some thing. In this case usually a speck of dust. \nAfter that the crystal has a geometric shape. The dendrite grows in one direction. Then another cyrstal neucleates off the side of the first and another dendrite grows.\nThis occurs in all crystals.\nIt is how they make steel hard, by making the dendrites smaller by cooling it faster
746370
This could be caused by several different things. Could be nothing, could be serious. See your doctor.
20013
It's called Chlorostannic Acid, and it usually results from a mixture of hydrochloric acid reacting with tin(IV)chloide. \nThe name comes just from looking at the compound:\nCl=chloro\nSn=Stannic/stannous\nH=acid\n\nI Hope you find this answer useful. :)
131640
I haven’t done any serious histology for over 10 years but…\nFirst off what do you mean by “without altering the mycelial growth”? Are you attempting to produce a live culture slide so that you can exmaine growth? If so then for God's sake don't use ethanol. Alcohol will certainly alter the mycelial growth. It will kill any growing mycelia. Alcohol also has a string tendency to cause shrinkage in soft tissues.\n\nDo you perhaps mean “without altering the mycelial structure”? That's a whole different story.\n\nLactophenol cotton blue is a combined stain and mounting fluid. The stain component (cotton blue) is designed to make the various cellular components contrast more so you can see them more easily. The lactophenol is just there as a mounting medium, not as a fixative. It serves approximately the same purpose as water on a wet slide but t lasts a little longer. Alcohol is a fixative. You can’t use it to replace the stain and it evaporates too fast to serve as a mounting medium. \n\nWhat do you want to use this slide for? How long do you need to store it?  I seem to recall, and a quick websearch seems to confirm, that lactic acid and acid fuschin does pretty much the same job as LCB. I’ll include one of the websites I turned up that suggest this. It also has a few other suggestions for mounting media/dye combinations that might suit you.\n\nSorry I can’t be more help. It’s probably because it’s been so long since I’ve done this, but I really don’t quite understand what you are trying to achieve.
6303
Silver iodide is released into the clouds which baically grabs hold of supercooled water droplets (water that is colder than ice but still liquid) and if the conditions are right, the supercooled water droplets will freeze, attract more water droplets and eventually form snowflakes....\n\nPlease understand that this is a very basic description but gives the idea...
512688
The reaction is triggered by the cold substance consumed coming into contact with the roof of the mouth. It irritates nerves in the region (sphenopalatine ganglia), causing them to spasm. These nerves cause the blood vessels in the brain to dilate. When vessels in the brain dilate, a common effect is an acute headache.
876779
If it persists go to your doctor. No messing around with ma nature!
817407
See page 32 of the PowerPoint presentation at http://www.ccm.udel.edu/Personnel/homepage/class_web/Lecture%20Notes/2004/AskelandPhuleNotes-CH10Printable.ppt,\n\nA number of PDFs are found with the following search http://www.google.com/search?hl=en&lr=&q=pb+sn+eutectic+photomicrograph&btnG=Search
1052413
This is a form of neuropathy.  It can be caused by many different things but mostly the onset of a diabetic reaction of some sort.  A good diet, watching your blood sugar levels and getting plenty of exercise to increase circulation should help.  It has for me.
1174208
There is no known cause; is appears and then diappears seemingly out of nowhere. It should NOT leave any permanent marks. I am not sure if you can get it again later in life.
639930
The typical hexagonal shape of the columnar jointing is caused by the presence of pyroxene, which is a hexagonal mineral, and a form of fractal influence on the joint formation by the pyroxene which dominates in the groundmass of the basalt. Pentagonal, heptagonal or octagonal joint patterns are also known, but are less common.
728797
To be perfectly exact, the melting point of the alpha modification, which has a monoclinic crystal structure, is 53.5 C, the beta form, which is triclinic, has an mp of 54 C.\n\nI suspect your p-dichlorobenzene was contaminated, perhaps with water, causing a freezing point depression.  Another possiblility is that the sample cooled so rapidly, that you overshot the freezing point.
191416
Hope this helps...\n\nhttp://cardhouse.com/x07/x07science.htm
675657
Yes. It's one of the main causes.\n\nhttp://zappa.ultrakohl.com/medstud/Meddocs/Panc2.htm
1114805
You've taken the first step in a good scientific inquiry.  You observed a phenomenon and began trying to explain it.  Now you can work toward an answer.  You could see if sugar (glucose?  sucrose?) is a molecule similar to salt for elevating the boiling point of water. (It depresses the freezing point like salt does.)  You could try measuring water just as it boils, and then with the same instrument, measure sugar-water just as it boils, and see if it really is elevated.  You can learn more about the subject by reading.  The melting point of glucose (C6 H12 O6) is 113 degrees Centigrade, higher than the boiling point of water.\n\nThen you can formulate theories as possible explanations.  You've started doing that.  Then you can investigate those.  Here's another.  Perhaps dissolving sugar is an endothermic reaction.  Mix some sugar and water which are both at the same temperature.  Does the temperature of the mixture change?\n\nIt takes a certain amount of energy to raise the temperature of water.  Look up the definition of calorie.  It takes additional energy to convert it from its liquid state to its gaseous state.\n\nIt often takes some discontinuity for a supercooled solution to freeze or form crystals, or for a superheated solution to boil.  The bottom of the pot has such discontinuities, and particularly irregular parts of the pot are where boiling likely starts.  When you add granulated sugar, you are adding lots of discontinuities.  What happens when you add dissolved sugar instead of granulated sugar?\n\nKeep good records, sign and date your notes and get them witnessed periodically.  They could be your first steps toward a very good science fair project or perhaps a bigger discovery and a patent.  Then, tell the world I helped you along.  That would REALLY make my day!
128361
just a suggestion.. it might be a form of neuropathy..\n\n\nkerri
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Primary Growth: Apical meristem is responsible for primary root and stem growth in vascular plants.\n \nPrimary Root Growth: is concentrated near the tip and results in the root growing in length. The root tip contains 4 zones of development: The root cap, which protects the area behind it and softens the soil ahead of it by producing a polysaccharide. The apical meristem, is an area of rapidly dividing cells. It will replace the cells of the root cap as they wear away and push cells above them that will develop into the main tissues of the plant. The zone of elongation, is an area where the cells elongate 10 times their original length. This elongation helps push the root into the soil. The zone of maturation, is the area farthest from the root tip. Here the new cells will specialize and carry out the functions of the epidermal, ground, and vascular tissue. The primary tissues in a dicot root are arranges in a central x pattern for the xylem with the phloem located in each of the angles of the xylem. In a monocot the vascular tissues are alternated in a circle.\nPrimary Stem Growth: begins at the tip of the terminal bud in the area called the apical meristem. The cell divisions are responsible for the stem's growth in length. The primary vascular tissue in monocots takes on a scattered arrangement. In a dicot, it takes a circular pattern.\n \nSecondary Growth: Increases the girth of a stem it is caused by the vascular and cork cambium.\n \nVascular Cambium: meristematic parenchyma produces xylem on the inside and phloem on its outer side. The secondary xylem accumulates and forms the wood. The secondary phloem does not accumulate and is sloughed off with the bark.\nCork Cambium: forms in the outer cortex. Produces cork and epidermal tissues.\nWood has 2 zones: Heartwood- the older (inner) layers of xylem blocked with resins. It is non -functional in water transport. Sap wood- outer xylem, vascular cambium, phloem and cork cambium. Conducts water and food.