In Germany, the national government funded the universities and the research programs of the leading professors. It was impossible for professors who were not approved by Berlin to train graduate students . In the United States, by contrast, private universities and state universities alike were independent of the federal government. Independence was high, but funding was low. The breakthrough came from private foundations, which began regularly supporting research in science and history; large corporations sometimes supported engineering programs. The postdoctoral fellowship was established by the Rockefeller Foundation in 1919. Meanwhile, the leading universities, in cooperation with the learned societies, set up a network of scholarly journals. " Publish or perish " became the formula for faculty advancement in the research universities. After World War II, state universities across the country expanded greatly in undergraduate enrollment, and eagerly added research programs leading to masters or doctorate degrees. Their graduate faculties had to have a suitable record of publication and research grants. Late in the 20th century, "publish or perish" became increasingly important in colleges and smaller universities. 
The University of Arizona Graduate Catalog and Program Descriptions
Purdue University (West Lafayette, IN) does not require the GRE for its graduate programs in chemistry; scroll down to Doctoral or Master’s Degrees Basic Requirements, where it says “ Graduate Record Examination (GRE): Not required.” The Chemistry Department offers . and . degrees in analytical chemistry, biochemistry, chemical education, inorganic chemistry, organic chemistry and physical chemistry. See more about the application requirements here .
We are looking for Editorial Board Members if you have PhD degree with minimum 5 years teaching experience you can apply.
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You may apply for a PhD with the Faculty of Engineering after being awarded with either a bachelors or masters degree with First Class Honours or Second Class (Division 1).