Evaluation of Scholarly Sources

"Stable Genetic Modification of Human Embryonic Stem Cells by Lenti-viral Vectors" Nature

Purpose: 
The purpose of this paper is to report on the research, methodology and results of the particular study involving genetic modification of a human embryo. This is a scholarly journal, and and the authors are communicating the results of their experiment in order to exchange their intellectual property with the scientific community. Part of publishing is offering up work to your peers in order to gain feedback - it is a good way to evaluate your work and determine if your conclusions are valid based on the information that is presented.
Publishing:
The article was published in Nature, a highly reputable journal of science, biology and engineering. This contributes to the credibility of the article, and the peer review of scholarly journals indicates that other renowned scientist in the field agree and approve of the findings presented in the piece. The article was published in February of 2003, so the article is fairly recent, but not within the last ten years, so it would not be ideal as a stand-alone source.
Source:
Sources mentioned in the paper all reference other academic journals, such as Science, which demonstrates the thoroughness of the research and also the reliability of the paper itself, because it seems to have a solid foundation.
Author:
The authors are of high repute. The lead author, Dr. Michal Gropp is a geneticist and researcher at the Institute of Gene Therapy at the Hadassah Medical Center. A brief search reveals the good reputation of the scientists.
Audience:
The audience are other scientists in the field - based on the terminology, the intended readers are peers of the scientific community.

"CRISPR/Cas9-mediated gene editing in human tripronuclear zygotes" Protein & Cell

Purpose:

The purpose of the article was again to communicate the results of the experiment and describe the methodology of the experiment. The purpose of a scholarly journal is to offer up research and findings to a community of your peers and subject your work to professional scrutiny - the paper attempts to present a correlation between findings and conclusions, as well as support the conclusions and methodology with prior knowledge.

Publishing:

The paper was published by Protein & Cell, a highly notable scholarly journal that focuses on genetic and DNA research. It was published on 1 April 2015, so the paper is very recent and would thus make an excellent source. Interestingly enough, the paper was rejected from Nature and other journals because the topic of embryonic research is still very taboo, despite the highly ethical manner in which the experiment was conducted.

Source:

The paper cites other academic journals, and so it can be determined that the paper has a strong foundation for the topic at hand. Sources indicate that the paper was well researched.

Author:

The authors are all highly reputable and are scientists at a prestigious university, which publishes many papers of its kind in a year.

Audience:

Based on the terminology and the presentation of the data, the intended audience is made up of peers in the scientific community.