28 research outputs found
KAJIAN DAMPAK PENCEMARAN LINDI TEMPAT PEMROSESAN AKHIR (TPA) CIANGIR TERHADAP KUALITAS AIR DAN UDARA
Full text linkThe purpose of this research is to know the Leachate Pollution Impactto Water and Air Quality on TPA (Tempat Pemrosesan Akhir) Ciangir Tasikmalaya City. The method used is descriptive analytic method. The data analyzed include data of city waste management, water and air quality and control of leachate pollution and socioeconomic data.Based on the analysis of air samples, it is known that almost all air parameters analyzed are below the specified quality standard, except the parameters of Dust (TSP) and Heavy Metal Lead (Pb) are not good for the environment because the concentration in the air has exceeded the air quality standard. Furthermore, based on the results of the water quality analysis, it is known that almost all parameters analyzed are below the specified quality standard, only the Total Dissolved Total (TDS) parameters that are in bad quality because the condition exceeds the quality standard of clean water. The area is adjacent to the rice field of the residents so that it requires monitoring of possible impacts. Taking into account the flow of waste landfill to the rice field, it is advisable on the continuation of research conducted utilization of waste water / leachate landfill to the growth and yield of rice crops
Mahogany Wood-Waste Vinegar as Larvacide for Spodoptera litura
No full textThe carbonization of lignocelullosic waste to obtain wood vinegar (WV) was investigated in this work. WV was used as a botanical insecticide against armyworm (Spodoptera litura), which is known as a major pest of soybean crops in Indonesia. This study includes the following: (i) the assessment of potential use of lignocellulosic waste from mahogany wooden-sandal home industry; (ii) the determination of the yield of various components of carbonization process, from each unit of the waste; and (iii) the application of the produced WV as larvicide on S. litura larvae in the laboratory. The experiments were arranged in a completely randomized design, and the observed variables included mortality and anti-feedant activity of S. litura larvae. The data were analyzed using analysis of variance with Duncan’s multiple differences test. The results showed that the amount of wood waste generated at wooden-sandal craftsman level was 16.12%. Carbonization of 1,000 g of the wood waste yielded WV, tar, bio-oil, and char in quantities of 442.68 g, 36.5 g, 4.04 g, and 251 g, respectively. The treatment using WV concentration of 1.5% to 3.0% showed low larvacidal action, which gave LC50 value of 12.82%, but it had adequate anti-feedant activity
Pengaruh Konsentrasi Urine Sapi dan Perendaman Terhadap Pertumbuhan Setek Jambu Air King Rose (Syzygium aqueum Burn.f.Alston)
Full text linkJambu air diperbanyak dengan setek yang berasal dari hasil pangkasan. Setek perlu dipercepat tumbuhnya dengan perendaman dalam  urine sapi yang mengandung  ZPT IAA dan IBA. Lama perendaman setek dalam larutan urine sapi disesuaikan dengan konsentrasinya. Penelitian bertujuan untuk mengetahui pengaruh konsentrasi urine sapi dan lama perendaman terhadap pertumbuhan setek jambu air king rose apple (Syzygium aqueum Burn.f.Alston).  Percobaan dilaksanakan di Kelurahan Kahuripan Kecamatan Tawang Kota Tasikmalaya, pada  bulan Februari sampai April 2020. Penelitian ini menggunakan metode ekperimental, dengan Rancangan Acak Kelompok (RAK) pola faktorial diulang sebanyak dua kali. Faktor pertama adalah konsentrasi urine sapi dengan empat taraf, yaitu ao= tanpa urine sapi ,a1= konsentrasi urine sapi 30%, a2= konsentrasi urine sapi 50%, dan a3= konsentrasi 70%. Faktor kedua adalah lama perendaman dalam urine sapi terdiri dari empat taraf, yaitu p0= kontrol), p1= 60 menit, p2= 90 menit, dan p3= 120 menit. Data dianalisis menggunakan sidik ragam dengan uji F dan dilanjut dengan Uji Jarak Berganda Duncan dengan taraf nyata 5%. Hasil penelitian menunjukkan bahwa terdapat interaksi antara konsentrasi urine sapi dan lama perendaman terhadap jumlah tunas. Perlakuan konsentrasi urine sapi 50% dengan lama perendaman 60 menit menghasilkan jumlah tunas yang paling banyak. Secara mandiri konsentrasi urine sapi 50% menghasilkan panjang tunas terpanjang. Konsntrasi urine sapi dan lama perendaman tidak berpengaruh terhadap kecepatan bertunas, luas daun dan panjang akar
PENGARUH HEMODIALISIS TERHADAP KADAR GLUKOSA DARAH PADA PASIEN DM
Full text linkPasien diabetes yang mengalami gagal ginjal terminal harus menjalani terapi pengganti ginjal yaitu berupa dialisis (hemodialisis dan peritoneal dialisis). Pasien diabetes yang menjalani hemodialisis merupakan kelompok besar pasien gagal ginjal terminal di negara berkembang, yang meningkatkan angka kesakitan dan angka kematian dibandingkan pasien hemodialisis yang nondiabetes Tujuan penelitian inidiketahui pengaruh Hemodialisis terhadap kadar gula darah pada pasien DM Di Ruang Hemodialisa.Desain penelitian adalah Quasy-Eksperiment (Pre-Post Test Control Group Design) guna mencari pengaruh dari variabel hemodialisis terhadap kadar gula darah. Peneliti mengukur kadar gula darah pasien sebelum dan sesudah tindakan hemodialisis. Populasi adalah semua pasien DM yang dilakukan tindakan Hemodialisis pada tanggal 1 - 30 Juni 2012 sebanyak 40 orang.Sampling yang dipakai adalah total populasi.Hasil penelitian menunjukkan bahwakadar gula darah responden sebelum tindakan hemodialisis sama antara ≤ 293 mg/dl sebanyak 20 orang (50%) dan > 293 mg/dl sebanyak 20 orang (50,0%), sesudah tindakan hemodialisis adalah ≤ 293 mg/dl sebanyak 25 orang (62,5%). Ada pengaruh hemodialisis terhadap kadar gula darah pada pasien DM antara sebelum dan sesudah hemodialisis(sebesar 17 mg/dl). Saran bagi institusi rumah sakit perlu dibuat suatu standar prosedur operasional tindakan hemodialisis bagi pasien gagal ginjal dengan komplikasi diabetes untuk menurunkan kadar gula darah pada pasien. Perlu dilakukan pengukuran kadar gula darah pada pasien DM yang dilakukan tindakan hemodialisis sebelum pulang sebagai bahan evaluasi untuk tindakan selanjutnya.Â
Modelling mixed-mode fracture in poly(methylmethacrylate) using peridynamics
Full text linkAbstractPeridynamics (Silling (2000)) is a non-local continuum theory that is particularly suited to handle discontinuities in the displacement field, such as those arising during fracture. Peridynamics prescribes that each material point interacts with all its neighbors contained in a sphere of given radius; this assumption introduces a characteristic length scale in the continuum description. In a nutshell, the interactions between material points depend on their relative distance; in the peridynamics framework this distance is called the “bond length”. The equations of motion, holding at each material point, link the material point acceleration to the integral over the point neighborhood of a force density field, whose strength depend on bond-stretches, i.e. the ratio of the actual bond-length over the initial one. In these equations the displacement gradient does not appear, thus naturally allowing for discontinuities in the displacement field to occur. As to failure, the simplest possible damage description is provided by an interaction law prescribing the force to vanish when a critical bond-stretch threshold is crossed; this parameter can be related to the Mode I critical strain energy release rate. A single parameter is needed to describe failure, in principle under every possible loading condition.In this work the predictive abilities of peridynamics were checked against experimental results in the case of mixed-mode failure of brittle polymers. Pre-cracked poly(methylmethacrylate) (PMMA) samples were tested using different specimens, in order to obtain Mode I, Mixed-Mode and Mode II loading conditions. The material was assumed to behave according to a peridynamics brittle elastic material model; the parameters needed to calibrate the elastic behavior were determined from Mode I tests, as was the critical stretch.The peridynamics simulations of mixed-mode tests were able to catch the correct fracture initiation load and to provide a fair description of the crack path under different conditions. The peridynamics model was also able to qualitatively capture the typical “nail” shape assumed by the crack front during propagation
The Nutrient Neighborhood, Haven-Stad, Amsterdam: Prototype of a sustainable neighborhood with integrated regenerative food production and local material reuse
No full textRegenerative neighborhood development in Amsterdam that harvests biological and technical nutrients on-site. The building's skin expands to a unique community space for local food production. The skin is seasonally adaptive through a low-tech system creatively reusing already existing climate-control components (the window) harvested from the site that were otherwise going to the landfill.Architecture, Urbanism and Building Science
INHIBITORY POWER OF EXTRACT OF SOURSOP LEAF (Annona Muricata), KIRINYUH (Chromolaena Odorata) AND GALANGAL RHIZOMES (Alpinia Galanga) ON Colletotricuhum Acutatum COLONY GROWTH IN VITRO
Full text linkSeveral plants that are potentially used as bio-pesticides are soursop, siam weed, and galangal. The research objective was to find out the effectiveness of leaf extract of soursop and C. odorata, and extract of galangal rhizome in inhibiting the growth of Colletotrichum acutatum colonies, causing antracnose on chilli, in in vitro. The experiment was conducted in the laboratory of Agriculture Faculty, Universitas Siliwangi Tasikmalaya from July until August 2016. The research design used was a completely randomized design consisted of nine treatments and three replications. The treatments were A ( control); B (soursop leaf extract, 0,5%); C (soursop leaf extract, 1%); D (C. odorata leaf extract, 0,5 %); E (C. odorata leaf extract 1%); F (galangal rhizome extract 0,5%); G (galangal rhizome extract 1%); H (mixture of soursop leaf extract, C. odorata leaf extract, and galangal rhizome extract each 0,5%; and I (mixture of soursop leaf extract, C. odorata leaf extract, and galangal rhizome extract each 1%). The results showed that the mixture of each 1% soursop leaf extract, C.odorata leaf extract and galangal rhizome extract was effective in inhibiting the growth of C. acutatum colonies at 7 and 14 days incubation period by 66,19% and 69,94% respectively. The three extracts are potentials as anti-fungus of C. acutatum.</p
Fractionation and antioxidant activity potency of the extract of Garcinia lateriflora Blume var. javanica Boerl leaf
No full textEFEKTIVITAS EKSTRAK DAUN SUREN (Toona sureni Merr.) DALAM PENGENDALIAN HAMA LALAT BUAH (Bactrocera dorsalis) PADA BUAH CABAI (Capsicum annuum L.)
Full text linkBactrocera dorsalis is a very harmful pest for fruit and vegetable. Chemicalcontrol of these pests has raised another problem. The use of surian leaf extractcan be a good and environmentally friendly alternative control. This study aims to determine the effect of the administration of vegetable pesticides from suren leaf extract in the control of B. dorsalis on red chili. This research had been carried out at Siliwangi University and BBPOPT, Karawang in July to August 2019. This study used a Completely Randomized Design (CRD) with six replications. The concentration of suren leaf extract were : 0%, 0.025%, 0.05%, and 0.1%. The results showed that chili fruit extracts with the highest 0.1% consistently could reduce the number of larvae and the number of fruit attacked. The maincompounds contained in the surian leaf extract include 9,12-Octadecadienoic acid (Z, Z) -, phytol, acetate, phenol, 2-methyl-5- (1,2,2-trimethylcyclopentyl) -, (S) -, Cedren-13-ol, 8-, and 3,7,11,15-Tetramethyl-2-. These compounds were thought to be strong compounds that play a role in suppressing the number of larvae and the number of fruit attacked
Daya Hambat Ekstrak Daun Sirsak, Kirinyuh, dan Rimpang Lengkuas terhadap Pertumbuhan Koloni Colletotrichum acutatum
Full text linkSeveral plants that are potentially used as bio-pesticides are soursop, siam weed, and galangal. The research objective was to find out the effectiveness of leaf extract of soursop and C. odorata, and extract of galangal rhizome in inhibiting the growth of Colletotrichum acutatum colonies, causing antracnose on chilli, in in vitro. The experiment was conducted in the laboratory of Agriculture Faculty, Universitas Siliwangi Tasikmalaya from July until August 2016. The research design used was a completely randomized design consisted of nine treatments and three replications. The treatments were A ( control); B (soursop leaf extract, 0,5%); C (soursop leaf extract, 1%); D (C. odorata leaf extract, 0,5 %); E (C. odorata leaf extract 1%); F (galangal rhizome extract 0,5%); G (galangal rhizome extract 1%); H (mixture of soursop leaf extract, C. odorata leaf extract, and galangal rhizome extract each 0,5%; and I (mixture of soursop leaf extract, C. odorata leaf extract, and galangal rhizome extract each 1%). The results showed that the mixture of each 1% soursop leaf extract, C.odorata leaf extract and galangal rhizome extract was effective in inhibiting the growth of C. acutatum colonies at 7 and 14 days incubation period by 66,19% and 69,94% respectively. The three extracts are potentials as anti-fungus of C. acutatum
