Wahyu, Haifa
Fakultas Kedokteran Universitas Andalas

Published : 6 Documents

Found 6 Documents

Pengaruh Perbedaan Dosis Ekstrak Biji Jarak Pagar (Jatropha curcas) terhadap Jumlah Spermatozoa, Spermatozoa Motil, Berat Testis, dan Diameter Testis pada Mencit Jantan (Mus Musculus) Wahyu, Haifa; Herman, Rahmatina B.; Amir, Arni
Jurnal Kesehatan Andalas Vol 5, No 2 (2016)
Publisher : Fakultas Kedokteran Universitas Andalas

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AbstrakIndonesia menghadapi persoalan kependudukan dan keluarga berencana yang cukup berat, salah satu penyebabnya dikarenakan rendahnya partisipasi pria dalam penggunaan kontrasepsi. Salah satu tanaman yang bersifat antifertilitas adalah jarak pagar (Jatropha curcas). Penelitian ini bertujuan mengetahui pengaruh perbedaan dosis ekstrak biji jarak pagar terhadap jumlah spermatozoa, spermatozoa motil, berat testis dan diameter testis pada mencit jantan (Mus musculus). Penelitian ini menggunakan metode post test only control group design terhadap mencit jantan dengan berat 20–30 gram. Sampel terdiri dari 24 ekor mencit dibagi dalam 3 kelompok P1, P2, dan P3 dengan memberikan ekstrak biji jarak pagar dengan 3 tingkatan dosis selama 36 hari. Hasil penelitian semakin tinggi dosis yang diberikan semakin rendah jumlah spermatozoa, spermatozoa motil, berat testis dan diameter testis namun secara statistik tidak terdapat pengaruh yang bermakna pada jumlah spermatozoa p=0,06 dan spermatozoa motil p=0,15 (p > 0,05) dan terdapat pengaruh bermakna pada berat testis p=0,00 dan diameter testis p= 0,00 (p< 0,05).Kesimpulannya pemberian ekstrak biji jarak pagar menurunkan jumlah spermatozoa, spermatozoa motil, berat testis dan diameter testis namun secara statistik ekstrak biji jarak pagar tidak terdapat pengaruh yang bermakna terhadap jumlah spermatozoa dan spermatozoa motil dan terdapat pengaruh bermakna terhadap berat testis dan diameter testis.Kata kunci: ekstrak biji jarak pagar, jumlah spermatozoa, spermatozoa motil, berat testis, diameter testis.AbstractIndonesia faces the quite severe problem of population and family planning, one reason is because the low participation of men in the use of contraception. One antifertility plants and are found in Indonesia is jatropha (Jatropha curcas). This study aims to determine the effect of different doses of extract of Jatropha seeds on sperm count, motile of sperm, testis weight and diameter of the testis in male mice (Mus musculus). This study uses the approach post test only control group design to male mice weighing 20-30 grams. The sample consisted of 24 mice were divided into 3 groups of P1, P2, and P3 to provide jatropha seed extract with 3 levels of doses for 36 days. The results showed the effect of Jatropha curcas seed extracts against sperm count, motile of sperm, testicular weight and testicular diameter between groups P1, P2 and P3. The higher the dose given, the lower the sperm count, motile of sperm, testis weight and diameter of the testis, but no statistically significant effect on the number of spermatozoa p = 0.06 and p = 0.15 motile of sperm (p> 0.05 ), and there is a significant effect on testis weight p = 0.00 and p = 0.00 testis diameter (p <0.05). From the results of this study concluded that administration of Jatropha seed extract can reduce sperm count, motile of sperm, testis weight and diameter of the testis but statistically jatropha seed extract contained no significant effect on sperm count and motile of sperm and significant effect on testis weight and the diameter of the testes.Keywords: Jatropha seed extract, sperm numbers, motile of sperm, testis weight, testis diameter.
Pengaruh Metode Glenn Doman (Tahap 1 dan 2) terhadap Perkembangan Komunikasi Anak Autisme di Autis Center Bengkulu Wahyu, Haifa; Betrianita, Betrianita; Pramesti, Melati Tridita; Padila, Padila
Jurnal Keperawatan Silampari Vol 2 No 1 (2018): Jurnal Keperawatan Silampari (JKS)
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.452 KB) | DOI: 10.31539/jks.v2i1.306


This study aims to determine the effectiveness of Glenn Doman method stages 1 and 2 on the development of autistic children’s thinking in autis center Bengkulu.The research design was quasi experiment using two group before after or pre test and post test design group. The result showed that in univariate analysis, it was found that the majority male with speech ability in control group and treatment group is quite capable before being treaten through Glenn Doman theraphy stage 1 and 2. Then the development of the majority treatment group is increasing to capable. In bivariate analysis, it was found out that there was a significant effect of Glenn Doman therapy stage 1 and 2 on the development of autism children communication in autis centre Bengkulu with value p 0,000 &lt; 0,0. Considering the importance of the development of children communication, especially children with autism, autism center Bengkulu is willing improve the method of Glenn Doman stages 1 and 2 in the process of education for children with autism. Keyword : Autism, Glenn Doman
Indonesian Mining Journal Vol 16, No 3 (2013): INDONESIAN MINING JOURNAL Vol. 16 No. 3 OCTOBER 2013
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol16.No3.2013.380


This paper presents a computational analysis of fly ash erosion on superheater tubes of a coal furnace. The investigation was held based on a hypothesis that erosion by coal ash particles have caused an untimely fail- ure of a superheater tube during the initial running of a relatively new coal fired power plant. Material erosion is usually caused by several corresponding factors, therefore, it is necessary to examine the process taken by the coal ash to wear out superheater material before conclusions on the ash factor are drawn. This work applies a combination method of analysis using mathematical model and computational fluid dynamics (CFD) simulation. The mathematical model was used to calculate the amount of erosion by the fly ash particles and CFD simulation was employed to examine the velocity profile of combustion products around the superheater bank. The CFD simulation was based on the real scale and the design parameters of the power plant. The simulation shows that the velocity vector of the combustion products around superheater bank varies from 1 to 20 m/s magnitude with impacting angle varies from 0 to 90° relative to the vertical position of the superheater. Ash data were taken from the actual coal used during the operation and the design specified coal according to the equipment specification. Mathematical model was formulated for a single ash particle and for ash bulk. The results show that differences in the ash particle parameters result in different amount of material removal which means that ash particles affect the wear out of the material. As an overall, for each ash particle, the maximum erosion occurs at impacting angle of 17°. The impacting angle is used further in determining the amount of mass removal by varying the velocity and the abrasiveness of ash particles. At the maximum level of erosion, which is the maximum velocity calculated from the CFD simulation (20 m/s), every kilogram ash particles containing 46.54 % SiO2 with ash particle average diameter 500 micron is capable to remove about 0.0045 miligram alloy steel material. The maximum penetration of the ash particles into the superheater material is found at the maxi- mum velocity obtained from the CFD simulation that is 20 m/s. The maximum penetration is 0.049 mm which is about 1.53 % of the pipe thickness. The superheater pipe is made of alloy steel material type A213-T91 with the thickness of pipe wall 3.2 mm. The magnitude of mass removal is considered relatively trivial to cause the thinning of material in a short period. This proves that coal ash particles will undergo a timely process to wear out superheater material, it is predictable and does not immediately cause erosion or failure. A brief physical examination was carried out to compare the results of the analysis and the causes of failures. It was found out that the failed superheater pipe had undergone clogging which caused overheating followed by pipe burst.
Indonesian Mining Journal Vol 15, No 3 (2012): INDONESIAN MINING JOURNAL Vol. 15 No. 3 October 2012
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1270.624 KB) | DOI: 10.30556/imj.Vol15.No3.2012.449


This paper provides an analysis on the effect of combustible content in coal ash refuse the efficiency towards combustion and heat thermal oil heater system in a coal furnace that had been studied. The study investigated the discrepancy of the actual performance of the heater compared to that as stated in the design specification. The study assumed that coal type and operational problem were the cause of deviation. Both affect combustion efficiency and the amount of reactive materials within coal ash refuse. Combustible content within the coal ash refuse was the used as the source data. Using indirect method, the amount of losses can be determined from the amount of combustibles in the coal ash refuse. The work involved measuring the temperature of oil and flue gas, analyzing the ash content and calculating the losses based on two sets of operational data. System efficiency and heat exchanger rating were calculated by reducing the amount of total losses from the full design capacity. If the reactive composition within the coal ash in combustible content, the amount of coal consumption is higher in order to attain the heat desired capacity for heating. Such a contition is caused by decreasing the energy capacity and reducing the furnace effectiveness
Investigation of Hydrogen Flow Uniformity in a Serpentine Separator Plate of a PEMFC Using Computational Fluid Dynamics Simulation Wahyu, Haifa; Oemry, Achiar; Djunaedi, Imam
Teknologi Indonesia Vol 35, No 3 (2012)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v35i3.189


This paper presents an investigation on the uniformity of hydrogen flow in a separator plate of a Polymer Electrolyte Membrane Fuel Cell (PEMFC). Hydrogen is the main reactant of a PEMFC that fl ows within the separatorplate and into the MEA. Separator plates have fl ow fi eld lay out which is the determining factor for the uniform distribution of the gas. The separator plates used in this study has the shape of serpentine fl ow fi eld, taken from a 200 Watt PEMFC stack. The fl ow of hydrogen gas is simulated within the separator plate to analyse the pressure and velocity distribution which has a correlation with the fl ow fi eld design. The objective of the study is to determine flow uniformity within the separator plates by increasing the hydrogen gas pressure from 1 bar up to 3 bars. Although flow distributions for the three cases are similar and quite uniform, but the velocity in the plates was reduced when the hydrogen pressure was increased. This is due to the backpressure occurs as a result of resistance from the flow field and also the gas diffusion layer governing a fuel cell. From the experiments on the characterization of fuel cell stack, the best practice is to maintain the inlet pressure at low level, that is around 1 bar, which is in agreement with the current simulation results. The fl ow was simulated using commercial CFD package by employing Navier-Stokes method which is the governing equation of the computational fl uid dynamics (CFD) application. The results are compared to the steady output without random differences of an experimental running of the fuel cell stack.
Teknologi Indonesia Vol 34 (2011)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.048 KB) | DOI: 10.14203/jti.v34iKhusus.39


The use of palm shell as fuel in fl uidized bed may be a better choice than that of coal in terms of carbon emission elimination due to its more environmentally friendly properties. But in reality it will cause operational problems. Continuous combustion results in agglomeration of the sand bed, which triggers defl uidization and hence operational shut down. This paper presents a combustion test of palm shell in a laboratory scale fluidized bed furnace with the capacity of 15 kg/hr located at the Research Centre of Physics, Indonesian Institute of Sciences. The results show that continuous burning of palm shell will lead to agglomeration in the furnace, especially when the temperature was above 800oC. The alkali and chlorine material contained in the biomass ash will interact with calcium silicate contained in the sand bed of FBC during combustion. Therefore the mixture of ash and silicate produces clinker that lowers its melting temperature down to about 800C.