<p>A humidifier including natural components such as mother-in-tongue law's (<em>Sansevieria sp</em>.) and lemongrass (<em>Cymbopogon nardus</em>) extracts is required to control room air quality. The purpose of this study was to assess the chemical composition and anti-fungal and anti-germ capability of <em>Sansevieria sp</em>. and <em>Cymbopogon nardus </em>in a room. The experimental method and One Group Pre-test Post-test Design were utilized in this investigation. To minimize airborne germs, <em>Sansevieria </em><em>sp</em>. and <em>Cymbopogon nardus </em>extract were used as humidifier modification materials in this case. Concentrations of <em>Sansevieria sp</em> extract of 30%, 40%, and 50% were made available. The data was analyzed using Anovatest.The Anova test results showed that the <em>Sansevieria sp</em>. extracts with concentrations of 30%, 40%, and 50% had p-values greater than 0.05. It signifies that there was no significant or insignificant difference in the concentrations used, hence the extracts of <em>Sansevieria sp </em>and <em>Cymbopogon nardus </em>extracts had the same effective antibacterial potential in this investigation. It was determined that <em>Sansevieria sp</em> and <em>Cymbopogon nardus </em>extract as modified humidifier solution at concentrations of 30%, 40%, and 50% have the same efficacy in decreasing Germ in the room air.</p>

This study aims to determine the effect of work climate on worker fatigue in Pabrik Tahu Kediri. This research is an observational study with a cross sectional approach. Data was collected by observation, interviews and measurements. The population in the study was 40 workers. The retrieval technique used is Ordinal Regression. The data obtained will be analyzed using the Ordinal Regression test. The variables in this study were labor fatigue as the dependent variable and hot work climate as the independent variable. From the statistical analysis, work fatigue is influenced by the characteristics of the workforce, namely age and gender (p 0.05). The results of the measurement of fatigue before work show that all workers experience low fatigue and 22.2% fatigue after work, 33.3% of workers who experience moderate fatigue and 44.4% of workers who experience high fatigue. The results of the measurement of the working climate in the production room are on average 32°C, which means it exceeds the NAV. Statistical test results show that there is a significant effect of work climate on labor fatigue at 0.001 0.05. Excessive hot work climate can cause body temperature to increase, sweating, which causes the body to lose fluids, salt and cause fatigue. Factors that influence labor fatigue are age, gender, and work climate. Based on the results of this study, the industry is advised to provide drinking places, adding ventilation to reduce heat exposure.

Tujuan penelitian untuk mendapatkan gambaran partisipasi mahasiswa terhadap kebersihan lingkungan kampus Politeknik Kesehatan Surabaya. Metode penelitian bersifat deskriptif untuk memperoleh gambaran partisipasi mahasiswa terhadap kebersihan lingkungan. Populasi dalam penelitian ini adalah seluruh civitas akademik Jurusan Kesehatan Lingkungan Surabaya dan Jurusan Gizi yang masih aktif, sejumlah 389 siswa. Sampel yang diambil dengan menggunakan teknik Stratified Random Sampling, sehingga jumlah sampel diperoleh sebanyak 98 siswa. Teknik pengumpulan data melalui wawancara menggunakan kuesioner dan teknik observasi menggunakamn formulir pengamatan. Hasil penelitian menunjukkan 59 orang (60,2%) mahasiswa bersikap cukup baik terhadap kebersihan lingkungan. Kebersihan 9 ruang kelas kampus (56,25%) dikategorikan kurang bersih dan kondisi ruang kantor 8 komponen (50%) dikategorikan kurang bersih. Bentuk partisipasi mahasiswa 54 (55,1%) dikategorikan cukup aktif. Hal ini dikarenakan rutinitas pelaksanaan kegiatan Jumat Bersih setiap 2 minggu sekali. Disimpulkan bahwa partisipasi mahasiswa terhadap kebersihan lingkungan kampus cukup baik. Namun perlu dilakukan pemahaman, motivasi dan evaluasi program agar dapat ditindaklanjuti di masa yang akan datang. Kata kunci: Partisipasi mahasiswa, kebersihan lingkungan, sikap mahasiswa.

<em>Sansevieria trifasciata</em> is a plant that has the potential to kill pathogenic bacteria due to its content. An experimental study with a laboratory experimental design was carried out to test the inhibition of <em>Sansevieria trifasciata</em> extract against <em>Escherichia coli</em> in vitro. Antibacterial testing of <em>Sansevieria trifasciata</em> extract was carried out at concentrations of 5%, 10%, and 40% to explore the growth of Escherichia coli by maceration method and using 96% ethanol. The medium used was Mueller Hinton Agar which had previously been inoculated with the test microbe (<em>Escherichia coli</em> ATCC 25922) and then the results obtained were compared with the control group for comparison. The ethanol extract of <em>Sansevieria trifasciata</em> with concentrations of 5%, 10%, and 40% could inhibit the growth of <em>Escherichia coli</em> bacteria with the average diameter of the inhibition zone respectively 6.63 mm, 5.42 mm, and 6.55 mm compared to the diameter of the <em>Escherichia coli</em> on the control variable + using the previous ciprofloxacin, namely 20.4 mm, 20.8 mm and 20.4 mm. <em>Sansevieria trifasciata</em> has good inhibition against the growth of <em>Escherichia coli</em> bacteria with low or high concentrations.