The air quality that is increasingly carrying out pollution as a result of pollution by human activities is of concern to the world, both developed and developing countries. The impact of air pollution is unavoidable, especially for health. Several efforts have been made to suppress the occurrence of pollution starting from the control of sources, media, and protective efforts in human beings. Focusing on protective efforts, this study was carried out by designed respiratory masks capable of adsorbing toxic gases in ambient air by utilizing mask materials on the market with the addition of activated carbon; the study was carried out with an experimental approach. Testing distinguishes the ability of cotton, spunbond, meltblown, and activated carbon as a respiratory mask to absorb toxic gases such as COx, NOx, and SOx. Test statistics are using the ANOVA test with a confidence level of 95%,α= 5%. The results show that combining activated carbon, spunbond, and meltblown is more effective compared to respiratory masks made from spunbond and meltblown (surgical masks) in absorbing toxic gases.

Masalah sampah pasar tradisional sebenarnya tidak terlalu susah, namun juga tidak sederhana,  karena memiliki karakteristik yang sedikit berbeda dengan sampah dari perumahan. Komposisi sampah pasar tradisional lebih dominan sampah organik yang dapat di daur ulang menjadi kompos  atau pupuk organik. Agar proses pengomposan dapat berlangsung lebih cepat diperlukan alat biakan berupa komposter dan menambahkan aktivator atau biang kompos. Tujuan penelitian ini yaitu enganalisis perbedaan penggunaan Komposter An-aerob dengan Komposter Aerob terhadap laju proses pengomposan sampah organik. Penelitian menggunakan metode eksperimen semu (quasi experiment), antara perlakuan (komposter Aerob) dengan kontrol (komposter An-aerob). Hasil menunjukkan kecepatan waktu pematangan kompos pada parameter perubahan warna bahan dan bau bahan kompos dengan komposter anaerob rata-rata kecepatan kematangan kompos sebesar 10,22 hari, sedangkan dengan komposter aerob rata-rata kecepatan kematangan kompos sebesar 9,89 hari. Berdasarkan uji statistik Wilcoxon Signed Rank Test dengan α 5%, untuk parameter warna diperoleh tingkat signifikansi (p value) sebesar 0,006, sedangkan berdasarkan parameter bau diperoleh tingkat signifikansi (p value) sebesar 0,003. Dengan demikian ada perbedaan yang bermakna antara proses pengomposan dengan menggunakan komposter anaerob dengan komposter aerob

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The development of resistance to chemical insecticides among mosquitos has been considered as a setback in vector control. However, the use of chemical insecticides is often toxic to both human and non-target animals, thus it needs the development of natural insecticides. This study aims to analyze the larvicidal effect of Z. mauritiana leaves as a natural larvicidal that is friendly to the environment. This research will outline the larvicidal effect of Z. mauritiana leaves and discuss the significance of addressing this natural larvicide against Aedes aegypti larvae. Methods and Material in this study, we developed a mosquito larvacide by extracting Z. mauritiana leaves with the maceration method. We extracted Z. mauritiana leaves into 5 different concentrations (1%, 3%, 5%, 7%, 9%) and its effect compared to the current chemical larvicide (1% of temephos). Data analysis was performed by using the computer and statistical of variance test One Way Anova. This experiment was successfully 100% killed Aedes aegypti in 24 hours of the intervention of 9% extract of Z. mauritiana leaves which was a powerful effect compare to recent studies. The intervention of concentration variations was significantly associated with larvae mortality (p ≤ 0,001).

Paving block workers are included in the informal sector and have a risk of lower back pain. Documenting the workers’ health status in the informal sector has not been done well so that workers do not get protection from the government. Heavy physical work puts pressure on the spine associated with repeated body twisting. This study aims to determine work attitude, length of employment, and exercise habits related to low back pain in Pontianak paving block workers in 2018. This type of research is observational with a cross-sectional approach. Sampling uses total sampling. The research sample of 56 paving block workers in the city of Pontianak, West Kalimantan. Data is processed with a computer program. Data analysis was performed univariate and bivariate and tested using the Chi-square test, with α = 5%. The results showed that there was a significant relationship between the length of the work (p = 0.013), work attitude (p-value = 0.038), and exercise habits (p = 0.003) with low back pain.