A lava lamp (or Astro lamp) is a decorative novelty item, invented in 1963 by British accountant Edward Craven Walker, the founder of the British lighting company Mathmos. The lamp consists of a bolus of a special coloured wax mixture inside a glass vessel, the remainder of which contains clear or translucent liquid, the vessel…
Preface Spectrometer is a tool used to measure the spectrum of light, Spectrometer is the basis of other sophisticated equipments such as spectrophotometer, Spectrophotometer is a tool used to measure absorbance by passing light with a certain wavelength on a glass or quartz object called a quvet. Some of the light will be absorbed and…
Preface Marriage is a matter of bonding marriage that is done in accordance with the provisions of law and religious teachings. In a marriage relationship, the child is the thing most couples look forward to. Pregnancy is a process experienced by almost all women. If the egg met with sperm it will occur fertilization that…
Preface Car exhaust contribute a lot to air pollution. And also contribute to global warming by releasing carbon dioxide and water vapor. Global warming is not from exhaust heat (some contribute) but from the fact that carbon dioxide and water absorb heat from the sun and from heat radiating from the ground. In this experiment…
The number of unsafe crackers consumed in the community because it contains a dangerous food coloring makes Anis Safina dkk.dari from Alhikmah Junior High School Surabaya make a detection solution of food coloring in the crackers, especially the yellow colored from sappanwood, the trees that we often encounter in the fields- fields that are usually…
Preface The role of ink today can not be separated from everyday human life from art, journalism, to the printing industry, all in need of ink, although at first seem trivial (Williams, 1988). Inks began to be used by people from the 3rd to 4th centuries AD by the Romans during the use of pen…
Preface Soil fertility is the key to success of a farm. However perfect a farming process but if not supported by the fertility of the land that surely will not bring maximum results. As an example of a case common to Indonesian farmers, farmers often provide excessive chemical fertilizers on their land but their production…
Preface 1.Problem The development of the times produces new ideas and innovations. This situation brings people to the bebagai advancement in the field of economy, health, biotechnology and so forth. One of the advancements that have a positive and negative impact is progress in the field of food processing, namely in the form of cans…
Introduction Chromatography is an analytical technique which uses the principle of selective adsorption. In this method, a mixture of substances is allowed to pass through a solid that will act as an adsorbent (chalk in the case). some substances in the mixture are more strongly adsorbed on the chalk than others. As they solvent moves…
Introduction Egg dyeing is a simple and common activity. Egg are dyed for Easter celebrations as well as for other decorative purposes.The Chinese will dye their eggs red during birthdays to signify good luck. When an infant reaches one month old, eggs dyed red will be distributed to all relatives. What is the chemistry behind…