gel-forming material
71immune system — Anat. a diffuse, complex network of interacting cells, cell products, and cell forming tissues that protects the body from pathogens and other foreign substances, destroys infected and malignant cells, and removes cellular debris: the system… …
72SNP genotyping — is the measurement of genetic variations of single nucleotide polymorphisms (SNPs) between members of a species. It is a form of genotyping, which is the measurement of more general genetic variation. SNPs are one of the most common types of… …
73reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… …
74Micro-encapsulation — is a process in which tiny particles or droplets are surrounded by a coating to give small capsules many useful properties. In a relatively simplistic form, a microcapsule is a small sphere with a uniform wall around it. The material inside the… …
75petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …
76Genetics — This article is about the general scientific term. For the scientific journal, see Genetics (journal). Part of a series on Genetics Key components Chromosome DNA • RNA Genome …
77Silicon dioxide — Silica redirects here. For other uses, see Silica (disambiguation). Silicon dioxide …
78Lead glass — Swarovski flacon. Lead glass is a variety of glass in which lead replaces the calcium content of a typical potash glass.[1] Lead glass contains typically 18–40 weight% lead(II) oxide (PbO), while modern lead …
79Cross-link — Reticulation redirects here. For water distribution networks, see Infrastructure#Water management infrastructure. For biological identification keys, see Reticulation (single access key). Vulcanization is an example of cross linking. Cross links… …
80History of the battery — could only function in a certain orientation. Many used glass jars to hold their components, which made them fragile. These practical flaws made them unsuitable for portable appliances. Near the end of the 19th century, the invention of dry cell… …
