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This study examines the effect of addition rice starch particle (RSP) in Polyethylene terephthalate (PET) based blend composites. The concentration of RSP in PET was varied at 0, 5, 10, 15 and 20 wt% with fixed percentage of sorbitol for 2 ml. The blend composites were produced by solution mixing method. All samples were tested by tensile and morphological observation after tensile test. The tensile test proves that the addition of RSP in PET increased tensile strength of blend composites. The maximum tensile strength was in 15 wt% RSP in PET for 9.79 MPa. Optical microscope displays minimum porosity with good fusion between RSP and PET. The addition of starch in polymer is suggested to reduce the percentage of using non-biodegradable polymer plastic. This research is important due to the development of biodegradable polymer.

The purpose of this study is to discover and explain the effects of Brand Ambassador and Brand Image on the Purchase Decision Process, as well as to discover and explain that the Brand Ambassador variable has a partial effect on the Purchase Decision Process. An explanatory research type and a quantitative approach are used in this study. A total of three variables were examined in this research: Brand Ambassadors (X1), Brand Image (X2), and the Purchase Decision Process (PDP) (Y). Tokopedia customers were asked to fill out an online survey as a means of obtaining data. The sample used in this study amounted to 116 respondents with the respondent's criteria, namely respondents knew E-Commerce Tokopedia and had shopped online through E-Commerce Tokopedia. Descriptive and multiple linear regression analysis are utilized as sampling methods. The results demonstrated that the purchase decision process (Y) was highly influenced by both the Brand Ambassador (X1) and Brand Image (X2) variables at the same time. Then, the influence of Brand Ambassador (X1) and Brand Image (X2) variables on the Purchase Decision Process is partial and significant (Y).

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Post- haverst  important to study because commodities were  living materials that  were  easily damaged after being harvested. The purpose of the experiment was to analyze the post-harvest quality of watermelon at the integrated field laboratory in Kediri. The research method uses organoleptic tests which include taste, color, type, shape, fruit weight. Two types of watermelon were analyzed, namely Samara watermelon (non-seed) and Black sweet. The results showed that the fruit with the heaviest weight was the Samara watermelon, which was 5.27 kg/fruit, red in color, artificial and non-seeded, compared to the black sweet, which weighed around 4.52 kg/fruit. The organoleptic test of samara watermelon was that the taste, type, color were very popular with consumers while the round shape was favored by consumers. Black sweet watermelon based on sensory test of taste was  very preferred, yellow color was  very preferred, oval shape and the type is liked by consumers. The profit from the samara watermelon harvest was  Rp. 3.7 million and black sweet Rp. 3.2 million