Dysmenorrhea is a complaint that is often experienced by women during menstruation. Pain management can be done with complementary measures, one of which is by giving lemon aromatherapy (citrus). Lemon aromatherapy contains limonene which can inhibit prostaglandins thereby reducing pain. The purpose of this study was to determine the influence of Lemon Aromatherapy (Citrus) on dysmenorrhea pain scales at students nurse study program the college health science BaiturrahimJambi.This study was conducted by pre-experimental method with a one- group-pre-test-post-test design conducted at the respondent's home. The respondents were 20 females students who experienced dysmenorrhea. This study was conducted on June - July 2020. This study its mean before administration was 4.45 and after administration the mean was 3.25. Based on the results of statistical analysis using the Paired t test, the p-value was 0,000 (p<0.05).It can be concluded that there is an influence of  lemon aromatherapy (citrus) on dysmenorrhea pain scales at students nurse study program the college health science Baiturrahim Jambi

<p><strong>ABSTRACT.</strong> The high food industry waste can cause pollution including a pungent odor and the emergence of bacteria that cause disease. Egg shells are confectionery waste that is commonly found in household waste and the food industry. The accumulation of eggshell waste can cause various diseases such as abdominal pain, diarrhea, fever, and cramps in the stomach caused by Salmonella bacteria. Thus, further processing of egg shells is required. In this study, eggshell waste was processed into heterogeneous catalysts of CaO. This heterogeneous CaO catalyst has the potential to be used as a catalyst in the manufacture of biodiesel. In this process, egg shells are processed by the calcination method. The variables used are shell type and calcination temperature. The shell variables used were chicken egg shells, duck egg shells, and quail egg shells. While the temperature variables used are at temperatures of 600 ºC and 800 ºC. To determine the quality of heterogeneous CaO catalyst, characteristic tests were varied out in the form of SEM-EDX and FTIR. From the analysis, the most effective results were in the form of chicken eggshell variables at a calcination temperature of 800 ºC.</p><p><strong>Keywords: </strong>Calcination, CaO, Catalyst, Shell, Waste</p>