Kuat Tekan Beton Geopolymer Optimum Pada Variasi Perbandingan Bahan Penyusun (20:80 S/D 40:60) Dan Pada Variasi Waktu Pencampuran (5 S/D 15 Menit)

Concrete is a building material that is composed of the main composition of coarse aggregate, fine aggregate, water, and Portland Cement. Concrete lately more often gets criticism, because of greenhouse gas emissions (carbon dioxide) generated in the cement production process. With these considerations, the development of new concrete binder called geopolymer concrete. One of the materials used in the manufacture of geopolymer concrete is coal fly ash (fly ash). By making use of fly ash as a substitute ingredient of cement is considered to safeguard the environment and reduce the cost of construction. In this study, the test object used is cylindrical, with a diameter of 15 cm and 30 cm high. Tests carried out at the time of compressive strength of concrete was only 28 days. Variations in concrete testing include: (1) Test the strength of concrete on the variability of the material making up 20%: 80% and the variety of mixing time of 5 s / d 15 minutes (2) Test the strength of concrete on the variability of the material making up 25%: 75% and the variety of mixing time of 5 s / d 15 minutes (3) Test the strength of concrete on the variability of the material making up 30%: 70% and the variety of mixing time of 5 s / d 15 minutes (4) Test the strength of concrete on a variation of the building blocks 35 %: 75% and thevariety of mixing time 5 s / d 15 minutes (5) Test the strength of concrete in the variation of constituents of 40%: 60% and the variety of mixing time 5 s / d 15 minutes. From the tests it can be concluded that the mixing time of the most optimum concrete mix was 7.5 minutes. If less than 7.5 minutes resulting binder less than the maximum holding capacity. And if the mixing time of more than 7.5 minutes resulting in a decreased adhesion binder. As for the subject to variations in concrete to total use of fly ash, it can be concluded that the higher the content of fly ash there is a tendency compressive strength is low, it's likely due to the influence of moisture content used in the mixture is obtained based on a count of the weight of fly ash used in each variation. So when the weight of the fly ash is higher, then the need for water is also getting higher and result in overly dilute the fresh concrete, so concrete compressive strength decreases

Analisis Nilai Tambah dan Risiko Rantai Pasok Keripik Bayam (Studi Kasus: UKM Khasanah)

UKM Khasanah is one of the UKM in Boyolali Regency which processes spinach into spinach chips. Processing of spinach is one way to increase the added value of spinach. In processing and marketing spinach chips also have several risks that must be faced. Therefore, it is necessary to do an analysis of value added and the risk of supply chain spinach chips. The method used to measure supply chain value added is Hayami’s method. Meanwhile, the method used to analyze the risk of supply chain spinach chips is House of Risk (HOR). Based on the results of processing by Hayami method, the biggest added value is produced by the supplier chain, which is 62.43% and the lowest added value is generated by the retailer chain, which is 2.47%. Based on the results of processing with the House of Risk phase 1 method, it can be identified that there are 20 risks in the supplier chain, 29 risks in the producer chain and 10 risks in the chain of retailers. In house of risk phase 2, it was found that the risk mitigation strategies in the supplier chain amounted to 9, the risk mitigation strategies in the producer chain amounted to 13, the risk mitigation strategies in the retailer chain amounted to 6

Prarancangan Pabrik Etil Akrilat Dari Asam Akrilat Dan Etanol Kapasitas 35.000 Ton/Tahun

Production of ethyl acrylate and some of its esters, is developing in the State of Indonesia. In industries such as paints (coatings) are examples of the use of ethyl acrylate shaped which is often used for polymer solution raw materials. While other derivatives of ethyl acrylate ester are emulsion polymer widely used in various fields, such as used for adhesive (adhesive), textile, paper, floor polish, for leather industry. In addition, it may also be used for copolymer compounds of acrylic fibers. Therefore, this ethyl acrylate plant is planned and designed to be established and operating for 330 days per year with a capacity of 35,000 tonnes / year. This is because to be able to meet the opportunities that are still open the export. In the process, the ethyl acrylate plant operates using a CSTR reactor at 70 ° C and 1 atm pressure. The reaction is an esterification reaction in the liquid-liquid phase with the non-adiabatic isotherm state. Acrylic acid feedstock requirement is 26,770,787.99 kg / hour and ethanol is 18,863,242.08 kg / hour. The process support utility includes the provision of water obtained from river water, the provision of steam of 1,176.57 kg / hour, the cooling water requirement of 21,345,545 kg / hour, the need for sanitation water and consumption of 2,584.70 kg / hour, fulfilled from PLN and 1 generator of 500 kW for backup. The compressed air requirement is 50 m3 / hour. This plant is planned to be established in the industrial area of Cilegon, Banten with a land area of 20,000 m2 and the number of employees as many as 186 people From the results of economic analysis on the p.reparation of ethyl acrylate plant obtained profit after tax of Rp. 26,699,779,345.79, ROI (Return On Investment) after tax 11,58%, POT (Pay Out Time) after tax 4,63% year, BEP (Break Even Point) 53,50% and SDP (Shut Down Point) 73.68%. While the DCF (Discounted Cash Flow) of 27.60%. From the economic analysis carried out it can be concluded that the ethyl acrylate plant with a capacity of 35,000 tons / year is worth considering for the realization of its construction. Keywords: Ethyl Acrylate, Esterification, CST

Farmasis Bersatu Menuju Eradikasi Tuberkolosis Paru Pada Anak

Tuberkolosis adalah penyakit menular langsung yang disebabkan oleh kuman TB (Mycobacterium Tuberculosis). Sebagian besar kuman TB menyerang paru. Merunut WHO Indonesia sebagai salah satu Negara dengan penyakit TB anak mecapai 60% dari seluruh dunia. Dengan banyaknya faktor yang terlihat pada pasien TB paru pada anak maka, penyakit ini perlu diperhatikan secara khusus. Tujuan dari kegiatan ini adalah memberikan pemahaman dan edukasi kepada masyarakat terkait tanda dan gejala TB paru pada anak serta penatalaksanaannya. Kegiatan ini dilakukan dalam bentuk seminar daring dengan memanfaatkan teknologi digital, yaitu Zoom Meeting dengan jumlah peserta 90 orang. Kegiatan ini dilaksanakan pada tanggal 26 Mei 2020 jam 08:30 wib sampai 11:00 wib. Indikator dari webinar didapat dari hasil pengisian pretest sebelum kegiatan webinar dilakukan dan post test sesudah webinar melalui google form oleh peserta. Hasil kegiatan ini secara kualitas 84,00% peserta dapat memahami materi yang diberikan dengan parameter nilai posttest ≥ 60

Evaluating herbivore management outcomes and associated vegetation impacts

African savannas are characterised by temporal and spatial fluxes that are linked to fluxes in herbivore populations and vegetation structure and composition. We need to be concerned about these fluxes only when management actions cause the system to shift towards a less desired state. Large herbivores are a key attribute of African savannas and are important for tourism and biodiversity. Large protected areas such as the Kruger National Park (KNP) manage for high biodiversity as the desired state, whilst private protected areas, such as those adjacent to the KNP, generally manage for high income. Biodiversity, sustainability and economic indicators are thus required to flag thresholds of potential concern (TPCs) that may result in a particular set of objectives not being achieved. In large conservation areas such as the KNP, vegetation changes that result from herbivore impact, or lack thereof, affect biodiversity and TPCs are used to indicate unacceptable change leading to a possible loss of biodiversity; in private protected areas the loss of large herbivores is seen as an important indicator of economic loss. Therefore, the first-level indicators aim to evaluate the forage available to sustain grazers without deleteriously affecting the vegetation composition, structure and basal cover. Various approaches to monitoring for these indicators were considered and the importance of the selection of sites that are representative of the intensity of herbivore use is emphasised. The most crucial step in the adaptive management process is the feedback of information to inform management decisions and enable learning. Feedback loops tend to be more efficient where the organisation’s vision is focused on, for example, economic gain, than in larger protected areas, such as the KNP, where the vision to conserve biodiversity is broader and more complex. Conservation implications: In rangeland, optimising herbivore numbers to achieve the management objectives without causing unacceptable or irreversible change in the vegetation is challenging. This manuscript explores different avenues to evaluate herbivore impact and the outcomes of management approaches that may affect vegetation