Development in the field of health is the achievement of an optimal public health degree. Among people who are often exposed to air pollution such as lead metal (Pb) is a gas station officer. One of the objectives of this research is to figure out the differences of lead level (Pb) in the hair of SPBU workers who base on Jl. Ir. Juanda based on length of service period by using experimental research to analyze Pb metal at gas station workers. The population and sample of research is hair of three gas station workers that contains metal of lead (Pb). The results of this study revealed that the longer employment period of workers, the higher the Pb level in their hair and the percentage recovery value for the wet destruction method using HNO3 and HCLO4 has an average recovery of 96.23% which is the precision test value of 4.01%. It is recommended that the validation test then use another method of dry destruction and examine the identity of age, place of birth date and lifestyle.

Aloe vera was a traditional medicinal plant that can react as an adjuvant to increase the immune response to antigens because of that Aloe vera was called an immunomodulator. Salmonella typhi bacteria can be destroyed and eliminated by improving macrophage function. This can be done using immunostimulants that have a function as immunomodulators. One plant that acts as an immunostimulant is Aloe vera. The Widal test is one method that utilizes immunology to determine levels of antibodies in the serum, to help diagnose typhoid fever. Based on the description, a study was conducted to see the effect of Aloe vera gel on widal titer in rats that were ingested by Salmonella typhi. This study used white male rats (Rattusnorvegicus L.) strain Wistar, body weight 200 grams consisting of 4 groups with 2 treatments 7 times repetition, namely P1 (Aloe vera gel 1.8 ml/200g/Bw), P2 (Aloe vera gel 3.6 ml/200g/Bw), control (+) ingested Salmonella typhi bacteria and not using Aloe vera gel, (-) using distilled water. The collected data includes objectively tested data, namely Widal titers. The Mann Whitney test results showed that Aloe vera gel affected the decrease of tidal titer (antibodies) in white rats which had been indicated by Salmonella typhimurium bacteria (P <0.05).

The purpose of this study was to compare the effectiveness of leaf decoction of antihypertensive herbs commonly used in Indonesia to lower blood pressure. This study used female rats induced hypertension as animal models. In this experimental study, rats were divided into seven experimental groups consisting of four rats for each group. Rats have induced hypertension with a dose of 2.5 mg/kg BW of prednisone and 2.5% NaCl. Hypertension induction for rats was carried out for 14 days, treatment with herbs of leaf decoction (soursop, starfruit, celery, and salam) with a dose of 200 mg/kg BW for 14 days. Rat's blood pressure was measured by the tail-cuff method at 0 days, 14 days, and 28 days. Statistical analysis used was an analysis of variance with ANOVA followed by a comparison between treatments with Dunnet's test. This study showed that all the herbal plants given were able to reduce systolic and diastolic blood pressure in female rats induced by hypertension, especially boiled celery leaves and star fruit leaves with p-value < 0.05.