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The purpose of this paper is to provide an overview of the antimicrobial and antioxidant properties of postbiotics and the use of postbiotics to increase the shelf life and quality of food.

In this review paper, all articles from five electronic databases containing Google Scholar, Web of Science, PubMed, Scopus and Science Direct were considered and selected according to the purpose of the study.

In addition to improving food safety and increasing its shelf life, natural food preservation using biological preservatives also has a positive effect on improving consumer health. As a result, protection using natural antioxidants and antimicrobial agents seems essential. Postbiotics, having favorable characteristics such as nontoxicity, long shelf life and ease of standardization and transportation, are known as suitable antioxidant and antimicrobial, and there is an interest in making antioxidant and antimicrobial active films containing postbiotics to delay spoilage, increase the shelf life of perishable foods without changing their sensory characteristics.

Postbiotic refers to all soluble factors that are either secreted from living probiotic cells or released after cell lysis. These compounds include enzymes, peptides, polysaccharides, organic acids, teichoic acids and cell surface proteins, and their effects have been proven to improve some human and animal diseases. Probiotic bacteria must survive unfavorable conditions such as processing, storage, distribution, preparation and the digestive system to exert their health-giving effects, whereas their metabolites (postbiotics) have overcome these adverse conditions well and may be a good substitute for probiotics.

The purpose of this viewpoint paper is to investigate the general rules of diplomacy and the manner of the Islamic government's behavior with other nations and governments from the viewpoint of Sufi mystics. This viewpoint is of the opinion that the aim of diplomacy in Islam is not only to get benefits for the country. The author argues that the aim of diplomacy in Islam is to develop human transcendence by divine teachings and is superior to just material benefits and privileges exchange. Basically, the Islam's government does not look at the other countries as a source of exploitation but as a brother or neighbor attempting to organize relations. In the current system of international relations in the world, so much attention has been paid to material benefits; but ethics and spiritualities are ignored.

Islamic diplomacy with the aim of improving the moralities and spiritualities attempts to create relations with other countries. Some principles for reaching this goal based on Islamic Sufism standpoints are provided.

A total of 23 principles are introduced.

Comparative researches in other religions' Gnosticism will be helpful.

These principles can be used for applied debates in the field and be added to new international regulations.

The author argues that the delicateness, truthfulness, and righteousness of Islamic Sufism, may turn the attentions of scholars and researchers to this viewpoint, and a new set of regulations to be codified.

Political scientists have not touched the topic from a Sufi point of view. This paper brings this approach to a new challenging arena for those who are engaged in it.