Disinfectant commonly used in water swimming pools is calcium hypochlorite {Ca(OCl) 2 }. Calcium hypochlorite is disinfectant which is used in the cleaning of water due to a searchable, inexpensive and contain approximately 70% chlorine. The use of calcium hypochlorite with improper doses will cause the formation of trihalomethane (THMs) compounds which are toxic and carcinogenic nature so that the use of calcium hypochlorite should be based on the calculation of Break Point Clorination (BPC) in order to secure for the environment. The purpose of the research was determine the opyimum dose of calcium hypochlorite in the form of crystal and solution for removal concentration of ammonium. The results obtained from the research that the optimum dose in the water swimming pools for disinfection process is not more than 10 g/L. The addition of calcium hypochlorite in the form of crystals can be removal the concentration of ammonium of 87.50% and in the form of aqueous solution of 83.30%. so it can be deduced that the addition of calcium hypochlorite in the form of crystals better than as a solution to removal the concentration of ammonium.

E-learning dapat diselenggarakan menggunakan aplikasi berbasis website, seperti : moodle dengan harapan mahasiswa dapat belajar kapan saja dan dimana saja dengan syarat tersedia koneksi internet. Universitas Maarif Haysim Latif telah memiliki Learning Management System, yaitu https://e-learning.umaha.ac.id sebagai media para dosen untuk melakukan pembelajaran e-learning dan hybrid learning. Akan tetapi, masih banyak dosen yang belum memanfaatkan fasilitas tersebut, salah satunya dosen-dosen dari Fakultas Ilmu Kesehatan. Program pengabdian kepada masyarakat ini adalah bertujuan untuk memberikan pelatihan dan pendampingan kepada dosen-dosen dari Fakultas Ilmu Kesehatan Universitas Maarif Haysim Latif dalam pembuatan mata kuliah e-learning. Kegiatan pelatihan ini dilaksanakan selama dua hari menggunakan beberapa metode, meliputi: ceramah, demonstrasi, latihan/praktik, pendampingan, dan tanya jawab. Materi dalam pelatihan ini, meliputi: e-learning, moodle, manfaat e-learning, tantangan penyelenggaraan e-learning, demonstrasi dan praktik cara membuat dan melakukan pengaturan mata kuliah online, memasukkan materi e-learning, membuat dan mengelola tugas/diskusi secara online, demonstrasi dan praktik cara membuat dan mengelola kuis/UTS/UAS. Pelatihan e-learning berbasis Moodle dengan mitra dosen-dosen dari Fakultas Ilmu Kesehatan Universitas Maarif Hasyim Latif Sidoarjo dapat diselenggarakan dengan lancar dan dapat memberikan pengetahuan dan keterampilan kepada para dosen tentang cara membuat, mengelola dan mengevaluasi pembelajaran menggunakan e-learning.

Infectious lesions on the skin surface are easily colonized by various organisms. Pyogenic infections are still common, especially in developing countries and for therapeutic treatment is a big challenge. Ensure appropriate and efficient therapy, inflammation-focused identification and treatment is needed. The aim of this research was to identify germs isolated from pus sample in patients suffering from wound infentions on the skin surface. The type of this research is descriptive explorative. Pus sample were taken from two people who had an infection wound on the skin surface. In this research was found Pseudomonas aeruginosa with a similarity percentage of 90.7% and Staphylococcus aureus with a percentage similarity of 91.5 % in the pus sample.

To show that banana inflorescence has effective adsorbent for the adsorption of dyes (congo red, remazol yellow, remazol black and methylene blue) from textile dyes waste and also to detrmine the optimum conditions of variety of pH (4-10), temperature (30°C-90°C), and contact time (15-105 minute) on the percentage adsorption capacity of banana inflorescence. Textile dyes waste and their degradation products such as aromatic amines are highhly carcinogenic. Adsorption-fluidization is a new technology for treatment of waste water containing different types of dyes. Adsorption-fluidization process is adopted for adsorption of dyes from the textile dyes waste using banana inflorescence in treated form and were analysed by Utraviolet-Visible Spectroscopy. The results showed that the optimum condition from adsorption process of Congo Red dye by banana inflorescence was reached at pH 5 (1.78%), temperature 60°C (1.51%) and 45 minute contact time (1.63%). While Remazol Yellow dye optimum at pH 9 (4.29%), temperature 50°C (4.65%) and 75 min (1.83%). Another dye, Methylene Blue showed the optimum condition at pH 9 (0.36%), temperature 40°C (0.22%) and 45 min contact time of adsorption (0.43%). The last, Remazol Black dye was reached at pH 5 (0.56%), temperature 40°C (0.56%) and 75 min contact time (0.56%).

Vitamin C is a source of antioxidants which has a primary function to inhibit the occurrence of an oxidation reaction and inhibit a free radical. The source of vitamin C can be found in food and beverage. This study aims to compare the measurement of vitamin C levels using a UV-Vis spectrophotometer at UV and Visible wavelength. The method used in this study was the UV-Vis spectrophotometry method. The analysis of vitamin C levels at UV wavelength 266 nm and Visible wavelength 494 nm with a calibration curve range 0.3 to 0.8 mg/L. Validation of the methods studied included: linearity, detection limits, quantization limits, and precision. The results showed that the measurement of vitamin C levels at UV wavelengths resulted in the linearity of concentrations of 0.2 - 0.8 mg / L, the limit of detection of 0.05 mg/L, the limit of quantization of 0.17 mg/L and level of precision with RSD to 0.2015. On the other hand, the measurement of vitamin C levels in the Visible wavelength produced linearity from concentrations of 0.3 to 0.8 mg/L, the detection limit of 0.05 mg/L, quantization limit of 0.18 mg/L and the level of precision with RSD of 1.0489. Thus, the determination of vitamin C levels in samples using a UV-Vis spectrophotometer was preferred to be measured at UV wavelengths.