ANALISIS KUALITAS AIR SUNGAI KIKIM DI KECAMATAN KIKIM TIMUR KABUPATEN LAHAT

This study aims to determine the physical properties of Kikim River water in Kikim Timur Subdistrict, Lahat Regency and find out the right way to solve water problems as an effort to treat water from physical parameters that exceed the quality standards according to the Regulation of the Minister of Health of the Republic of Indonesia Number 492 / MENKES / PER / IV / 2018 concerning requirements for drinking water quality. The parameters tested in this study included temperature, total suspended solid (TSS) and degree of acidity (pH). Sampling was carried out at three points, namely Point 01 in Gunung Kembang Village or Kikim Hulu River, Point 02 in Bungamas Village or Kikim Tengah River, and Point 03 in Lubuk Tampang Village or Kikim Hilir River. The results of the test analysis of the Kikim Timur River water samples carried out at the Environmental Service Unit of the Environmental Service Laboratory (DLH) of Lahat Regency at points 01, 02 and 03 indicate that the parameters tested, namely temperature, (TSS) and pH values still meet the standards according to Regulation of the Minister of Health of the Republic of Indonesia Number 492 / MENKES / PER / IV / 2018.

PEMODELAN INCIDENT RATE DEMAM BERDARAH DENGUE DI INDONESIA YANG BERKAITAN DENGAN FAKTOR LINGKUNGAN MENGGUNAKAN METODE GEOGRAPHICALLY WEIGHTED REGRESSION (GWR)

Dengue hemorrhagic fever cases in Indonesia often occur in cities and villages. Every year hundreds to thousands of people must be hospitalized due to this disease. There are several factors of the physical environment that directly or indirectly influence the transmission of this disease. Such as rainfall, air temperature, and humidity. In addition to the physical environment there are several other factors that can increase the occurrence of dengue cases, namely population density and the level of larvae free in an area. For this reason, we conducted a study of the above factors and their contribution in the addition of dengue cases that occurred in Indonesia in 2015 using secondary data. The purpose of this study is to identify and make a BDB iricident rate model related to environmental factors such as temperature, humidity, population density, and the amount of rainfall on the number of cases of dengue hemorrhagic fever in Indonesia in 2015. The method used is the Geographically Weighted Regression method. (GWR). In the GWR model the parameter estimation uses Weighted Least Square (WLS) by weighting the gaussian kernel function. The results of the study concluded that modeling with GWR was better than linear regression and the variables were significantly different in each region.

POTENSI MINYAK ATSIRI BUNGA KENANGA (CANANGA ODORATA) SEBAGAI ANTIBAKTERIA DALAM SEDIAAN HAND SANITIZER GEL

Sumber daya alam yang dimiliki Indonesia akhir-akhir ini semakin banyak dieksploitasi sebagai bahan obat-obatan baik untuk farmasi maupun untuk kepentingan pertanian. Salah satu tanaman tersebut adalah tanaman kenanga yang bisa dimanfaatkan minyak atsirinya sebagai bahan antibakteri pada produk hand sanitizer gel. Minyak atsiri kenanga diperoleh melalui proses destilasi uap bunga kenanga, kemudian diuji identifikasi fitokimia lalu fisiknya dan kualitasnya meliputi bobot jenis, indeks bias, dan bilangan ester sesuai SNI 06-3949-1995 lalu diuji potensi aktivitas antibakterinya. hand sanitizer gel minyak atsiri bunga kenanga dibuat sebanyak 4 formula. dengan konsentrasi minyak atsiri bunga kenanga 5%; 2,5%; 1,25% dan 0,5%. Data yang diperoleh meliputi fisik, viskositas, pH, daya sebar, daya lekat, organoleptik dan uji aktivitas antibakteri. Hasil penelitian menunjukkan bahwa hand sanitizer gel dengan minyak atsiri bunga kenanga memiliki aktivitas antibakteri terhadap bakteri S. aureus dan E. coli. Dari uji daya hambat disimpulkan bahwa hand sanitizer gel dengan konsentrasi minyak atsiri bunga kenanga 5% paling optimal yang memiliki pH 5,75; viskositas 4120; daya sebar 5,5 cm2 dan daya lekat 18,33 detik.

INDENTIFIKASI FAMILI ZINGIBERACEAE DI KAWASAN HUTAN GUNUNG BUA KERINCI

Zingiberaceae is a family of ginger plants found in the forest area of Mount Bua Kerinci. However, many species of the family have not been properly identified. This research aims to find out the type of family Zingiberaceae in the forest of Mount Bua Hill. This type of research is qualitative research with exploratory survey methods. The data collection techniques used are observation and documentation. The results showed that the family species zingiberaceae found are 5 clans and 9 Species namely Curcuma domestica (Turmeric), Zingiber aromaticum (Lempuyang), Etlingera elatior (Kecombrang), Curcuma Heyneana (Temu Giring), Curcuma aeruginosa (Black Meeting), Curcuma zedoria (White Meet), Zingiber cassumunar (Bangle), Amomun maximum (Cardamom), Kaemperia galanga (Kencur).

DAMPAK KEBERADAAN TEMPAT PEMBUANGAN AKHIR TERHADAP KONDISI LINGKUNGAN DAN SOSIAL DI MASYARAKAT (STUDI KASUS DESA KARANG REJO KOTA METRO LAMPUNG)

Open Dumping and inadequate landfill management and waste management have negative impacts on the community. Failure to manage waste in Metro City is not only due to technical weaknesses, lack of financial support, inefficient management agencies, and inappropriate systems can cause Emotional Mental Disorders (GME) as well as densely populated settlements, slums, poor ventilation, damaged house buildings, damp and moldy walls of houses, to the presence of pests around the house can cause anxiety to mental disorders. Researchers evaluated the presence of landfills in 23 Karang Rejo Metro cities, so that the existence of landfill can be in accordance with the prevailing rules. The research method used is qualitative, researchers decipher words in the opinion of respondents descriptively. In addition to interviews, to strengthen the data sought, researchers took pictures and made observations to the community with inter-community interactions, how people live environmental and social lives. Garbage disposal technology has developed, one of the development of the waste disposal method is the Sanitary Landfill method, with the Reusable Sanitary Landfill (RSL) model. The way the supply method works is that the garbage is stacked in a land, then the garbage can is compacted as a ground liner. Ground liners are coated with geomembranes, this layer that will withstand the pervasiveness of lindi into the soil and contaminate groundwater. On top of the geomembrane layer is another geotextile that serves to hold the dirt so that it does not mix with lindi water. The limitations of perspective in the study because the study lies in the small sample, it is suggested it is necessary to do more research by comparing some cases with different concepts.

PEMANFAATAN KIJING LOKAL (Pilsbryoconcha exilis) SEBAGAI BIOFILTRASI LOGAM ARSEN (As)

Heavy metals in waters are a threat to living things both biota that are in these waters, as well as on plants and humans that depend on these water sources. Water quality improvement can be done by utilizing local gravestone (Pilsbryoconcha exilis) as a natural filter. In this study consisted of four treatments and three replications. The amount of gravestone weights of 200 grams, 300 grams and 400 grams acts as a treatment that will later be seen its effect on water containing arsenic metal. The results of this study indicate that local gravestone can reduce arsenic levels in waters with a treatment weight of 400 grams showed the best results with the final result arsenic level of 0.0101 ppm and the highest daily growth rate is 200 grams of weight treatment with a market value of 4.40%.

KEANEKARAGAMAN JENIS TUMBUHAN PAKU (PTERIDOPHYTA) DI KAWASAN HUTAN TUMBANG MANGGU, KECAMATAN SANAMAN MANTIKEI, KABUPATEN KATINGAN, KALIMANTAN TENGAH

Research on the diversity of ferns in the forests of Tumbang Manggu, Sub-district Sanaman Mantikei, Central Kalimantan, has been done. The study was conducted in March – April 2016 by using explorative methods. The results show, at least 28 species of ferns were found in the forest area, of which 16 species are terrestrial ferns and 12 species of epiphytic ferns. These species are included in 22 genera and 14 families. Huperzia and Pyrrosia are most abundant, each genus were consists of 3 species. The most rich families in term number of species are Polypodiaceae and Lycopodiaceae, with 6 species and 4 species respectively. Abundance of each species in the region was different, Blechnum orientale L., Dicranopteris linearis (Burm. f.) Underw., Lycopodiella cernua (L.) Pic. Serm., and Vittaria scolopendrina (Bory) Schkuhr ex Thwaites were found in large quantities and spread almost all over the region. Asplenium nidus L., Drynaria quercifolia (L.) J. Sm., Stenochlaena palustris (Burm. f.) Bedd., Lygodium circinatum (Burm. f.) Sw., Pyrrosia lanceolata (L.) Farw., Nephrolepis falcata (Cav.) C. Chr. and Vittaria ensiformis Sw. were found in considerable numbers. Asplenium pellucidum Lam., Athyrium bantamense Milde, Helminthostachys zeylanica (L.) Hook. and Tectaria crenata Cav. were found in small quantities and only in certain places. Local communities around the region have not much utilizing the ferns yet.

TIPOLOGI, DINAMIKA, DAN POTENSI BENCANA ALAM DI KAWASAN PESISIR KABUPATEN TULUNGAGUNG

This study aims to determine the typology, dynamics and potential of natural disasters in the coastal area of Tulungagung Regency, East Java Province. The results of this study indicate that the typology in the coastal area of Tuluagung Regency consists of structurally shaped coast, wave erosion coast, marine deposition coast, land erosion coast, sub aerial deposition coast and several forms of typology impact from human activities utilizing coastal resources. The form of dynamics that develop in the coastal area of Tulungagung Regency is generally influenced by environmental conditions, factors of sea water waves and human activities in meeting the needs of life as well as for meeting the means of tourism development. While the potential for disasters in the coastal areas of Tulungagung Regency such as tsunami, abrasion, and sea water intrusion.

EVALUASI KINERJA METHYL DIETHANOL AMINE (MDEA) DALAM PENYERAPAN KANDUNGAN H2S PADA PROSES PENGOLAHAN GAS ALAM

Drilling natural gas contains water vapor (H2O) and contaminant gases such as CO2 and H2S which must be removed because it reduced the calorie value of the product. H2S gas is also corrosive, easily damaging equipment so that it increased maintenance costs. The process of removing CO2 and H2S gas uses MDEA (methyl diethanolamine). This study aims to determine the optimal concentration and flow rate of absorbent methyl diethanolamine (MDEA) to absorb H2S in the plant I gas flow in Energy Equity Epic (Sengkang) Pty.Ltd. The study was carried out with a steady MDEA mix absorbent flow rate (50% pure amine and 50% demineralization water) fixed at 13 US Gallons per minute flowing continuously at the upper absorber inlet, sour gas flow rate, at the bottom of the absorber inlet with variations in the flow gas namely 7,9,11,13,15,17 MMSCFD and is contacted with amine solution counter-current. Purified natural gas (sweet gas) produced from the top absorber column outlet with an H2S content below 10 ppm. The results showed that the greater the flow rate of gas inlet, the greater the acid gas absorbed. The amount of gas entering and exiting gas follows the equation y = 0.003 x - 2.2537. The ability of the amine solution to absorb H2S follows the logarithmic equation y = 0.167 ln (x) + 101.02 with a value of R = 0.9857, y is H2S absorbed by the amine solution and x is the H2S rate.

AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL BIJI KAPULAGA JAWA (Amomum compactum Soland. ex Maton) TERHADAP Streptococcus pyogenes

Streptococcus pyogenes is one of the pathogenic bacteria that causes pharyngitis. Natural treatment to overcome these problems is to use cardamom seeds. The purpose of this study was to test the antibacterial activity, determine the concentration of inhibitory zone and phytochemical compounds from ethanol 96% extract of Java cardamom seeds (Amomum compactum Soland. Ex Maton) against Streptococcus pyogenes. The method is used solid dilution and paper disc diffusion method. The solid dilution method is used for the Minimum Inhibitory Concentration (MIC) test with a concentration of 1.25%, 2.5%, 5% and 7.5% while the paper diffusion method is used for the Inhibition zone Diameter (IZD) using five treatments namely three concentrations of ethanol 96% extract of Java cardamom seeds (7.5%, 10% and 12%), one positive control of amoxicillin 0.01 mg/mL and one negative control of sterile distilled water. IZD data were analyzed using ANOVA with a confidence level of 95% and α = 0.05 and Duncan's further tests to determine differences between treatments. The results showed that the MIC was at a concentration of 7.5% while for the IZD test which had the highest activity there was a concentration of 12% with an average inhibition diameter of 12.03 ± 0.14 mm. In addition, ethanol 96% extract of Java cardamom seeds contain alkaloids, flavonoids, terpenoids and tannins which function in antibacterial activity.