Sentence examples for by alteration from inspiring English sources

The ash contains partly altered volcanic rock fragments and volcanic glass accompanied by alteration minerals, as is typical of non-juvenile hydrothermal-eruption deposits.

It is of secondary origin, having been formed by alteration of primary uranium-vanadium minerals.

Since potassium is usually added by alteration, the daughter parent ratio and the age might be too low.

The letter to Secretary Thompson from House Democrats said that by alteration and deletion, the disease control agency "is now censoring the scientific information about condoms it makes available to the public" in order to suit abstinence-only advocates.

Often brown and earthy, it is formed by alteration of other iron minerals, such as the hydration of hematite or the oxidation and hydration of siderite or pyrite.

Cd pronouncedly affects photosynthesis by alteration of its vital machinery in all aspects.

These strategies can be augmented by alteration and adaptation of the surgeon's technique.

PNIPAAm substrates are well known for controlled cell adhesion/detachment by alteration of temperature.

As for the device color, it can be tailored by alteration of the electrolyte thickness.

Our results demonstrate that the ultrastructure can be controlled by alteration of the coagulation conditions.

Free radicals play vital role in tumor promotion by alteration of cellular metabolic processes and their scavengers (SOD and LPx).