Articles

SOLID KARBURISING PROCESS WITH COCONUT SHELL CULTURE MEDIA USED REINSTALLED IN LOW CARBON STEEL PACKING (PACK CARBURIZING PROCESS USING RECYCLING COCONUT SHELL CHARCOAL ON LOW CARBON STEEL HARDENING) Wibowo, Heri; Soemowidagdo, Arianto Leman
Jurnal Penelitian Saintek Vol 16, No 1: April 2011
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v16i1.1740

Abstract

Penelitian ini bertujuan untuk memperbaiki efisiensi proses karburising pada baja karbon rendah melalui pemakaian arang tempurung kelapa secara berulang sebagai karburiser. Arang tempurung kelapa dengan ukuran 30 mesh digunakan  untuk lima kali proses karburising  secara berulang.  Benda  uji dari baja karbon rendah diletakkan dalam kotak karburising dari pipa baja diameter 50 mm tebal dinding 2 mm. Tiap proses karburising padat dilakukan dalam dapur pemanas selama 4 jam. Pengaruh pemakaian arang tempurung kelapa secara berulang pada   proses karburising padat dianalisis berdasar hasil uji kekerasan permukaan, case depth dan pengamatan struktur mikro. Case depth optimal setebal 300 urn terbentuk pada proses karburising menggunakan serbuk arang tempurung kelapa yang telah dipakai 2 kali proses. Arang tempurung  kelapa masih layak digunakan  sampai 4 kali proses karburising dengan kekerasan permukaan masih mencapai 642 VHN. Kata kunci: arang tempurung kalapa, karburising padat, baja karbon rendah
PENGARUH SUHU DAN KELEMBABAN UDARA TERHADAP KEBERADAAN TUNGAU DEBU RUMAH DI PAMULANG DAN JAKARTA Subahar, Rizal; Aulung, Agus; Firmansyah, Nurhadi Eko; Lubis, Nadar Sukri; Wibowo, Heri
E-Journal Widya Kesehatan dan Lingkungan Vol 1 No 2 (2018)
Publisher : E-Journal Widya Kesehatan dan Lingkungan

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Abstract

House dust mite (HDMs) may be found in urban dwelling and the existence of HDMs is influenced by temperature and relative humidity. The aim of the study was to evaluate the temperature and relative humidity effect the existence of HDM in Pamulang and Jakarta. There were 52 house dust samples from Pamulang and 44 from Jakarta examined by direct method using microscope to detect HDM in the dust samples. The temperature and relative humidity in the house were examined by thermohygrometer. The collecting of the samples was conducted 3 times with 2 weeks interval time. The species of HDM found were Dermatophagoides pteronyssinus, D.farinae, and Glyciphagus destructor. Statistically, the existence of HDM in 30-35oC was not significant different from that in < 30oC in both Pamulang and Jakarta (p<0.05). In contrast, the existence of HDM in relative humidity, 60-70%, was significant different from that in <60% in both Pamulang and Jakarta (p<0.05), especially in third sample collecting. It can be concluded that the existence of HDM was influenced by relative humidity, but not temperature in urban dwelling.
KUALITAS HIDUP PENDERITA STROK FASE REHABILITASI DI KOTA SEMARANG -, Arwani; -, Shobirun; Wibowo, Heri
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2011: PROSEDING SEMINAR NASIONAL KEPERAWATAN PPNI JATENG
Publisher : Universitas Muhammadiyah Semarang

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Abstract

Latarbelakang&tujuan - Diperkirakan saat ini di Indonesia ada 500.000 penduduk yang terkena stroke. Dari jumlah tersebut, sepertiganya bisa pulih kembali, sepertiga lainnya mengalami gangguan fungsional ringan sampai sedang dan sepertiga sisanya mengalami gangguan fungsional berat yang mengharuskan penderita terus menerus di kasur. Pada kondisi yang seperti ini pengukuran kualitas hidup pada pasien strok fase rehabilitasi menjadi sangat penting diperhatikan. Metoda - Penelitian deskriptif korelasi dengan rancangan crossesctional dilakukan dengan tujuan untuk mendapatkan gambaran kualitas hidup (quality of life) dari penderita strok fase rehabilitasi di kota Semarang, dan mengetahui hubungan antara dukungan keluarga dan pendidikan dengan kualitas hidup pasien strok fase rehabilitasi. Populasi dalam penelitian ini adalah semua penderita strok fase rehabilitasi yang ada di kota Semarang. Sebanyak 65 penderita stroke fase rehabilitasi yang tinggal di kota Semarang digunakan sebagai sampel dalam penelitian ini (lotal sampling);- Analisa yang digunkan adalah dengan analisa univariat untuk menggambarkan kualitas hidup penderita strok fase rehabilitasi dengan distribusi frekuensi. dan prosentase, dan analisis bivariat untuk mengetahui hubungan antara dukungan keluarga dan pendidikan dengan kualitas hidup penderita strok fase rehabilitasi menggunakal uji rank Spearman. Hasil - Kualitas hidup penderita strok fase rehabilitasi di kota Semarang sebagian besar mengalami gangguan pada aspek energy, peran, mobilitas, kepribadian, peran sosial, dan fungsi anggota gerak atas. Sedangkan aspek yang tidak mengalami kesulitan ataugangguan adalah aspek bahasa, suasana hati, perawatan dini, berpikir, penglihatan, pekerjaan/ produktifitas, dan spiritual. Dukungan keluarga yang diberikan lebih banyak pada dukungan instrumental dan informasi. Hasil uji statistik menunjukkan tidak adanya hubungan antara dukungan leluarga dengan kualitas hidup pasien strok fase rehabilitasi (p =0,728) demikian halnya dengan pendidikan dengan kualitas hidup pasien strok fase rehabilitasi di kota Sernarang (p= 0,751). Simpulan & Saran - Disarankan untuk dilakukan penelitian lebih mendalam mencakup jumlah sampel yang lebih besai, cakupan wilayah yang lebih luas, dan perlunya penyediaan buku panduan (buku saku) tentang kualitas hidup bagi penderita strok dan keluarganya. Kata Kunci: Strok fase rehabilitasi, dukungan keluarga, pendidikan, kualitas hidup
PEMBUATAN ALAT PENGERING KERUPUK UNTUK INDUSTRI KECIL PEDESAAN Wibowo, Heri; Purnomo, Edy
INOTEKS Vol 8, No 2 (2004): Agustus 2004
Publisher : LPPM UNY

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Abstract

The problems   faced  by crisply  industry  "Sarinah"   was  the  problem of dryer of kerecek (raw  crisply)  which  need wide of place and very depend on  weather.   The   operation    could   be  adapted   by  requirement    of   good production   on  noon   or  night.   Target   activity   of  this  program   was  give additional   aid  of  equipment   of  production   matching   with  requirement    of small  industry   so  that   production   mount   and  have  technology    mainstay production,  efficient  and cheap  of operating  expenses.To  overcome    problems    of  production   draining   of  crisply,   gone through the following  stages:   (1) making  scheme  of crisply  dryer  according to  requirement   of  small  industry;   (2)  making  crisply  dryer  with  adequate capacities  (15.000-20.000)    in a short  times  (7 -  8 hours),  and  (3)  partner industry can exploit  dryer technology  in an optimal  flashing.Execution  of activity  orients  on efficacy  of making  of dryer  able  tobe exploited  properly.  The result  of make-up  of small industrial  productivity after wearing  this appliance  is marked  with attainment  of larger  ones  om set. Total the omset  before  this  program  is 8000 crisply  sold (equivalent   of Rp800.000,00/day).   After  adjustment   of technology  of dryer,  tired  mean  omset13.000 until  15.000 crisply.  On bad weather,  industrial  this crisply  produces crisply  till  20.000   because   getting   the  order  5000  of  crisply   from  other industries.   This  means   program   of  this  voucher   can  increase   product   on small industry.Key words: dryer, crisply, small industrial
Quality Control Analysis Into Decrease the Level Defects on Coffee Product Wibowo, Heri; Sulastri, .; Khikmawati, Emy
International Conference on Engineering and Technology Development (ICETD) 2013: 2nd ICETD 2013
Publisher : Bandar Lampung University (UBL)

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Abstract

Many local companies were that engaged in the manufacturing of coffee beans into semi-finished carelessly ready for export. To maintain the product to fit customer demand, it is very necessary quality control. The problems are the following: (1) The destruction of coffee still within the limits of control or not. (2) Any type of damage that occurs in coffee product were produced. (3) The factors that cause damage to the coffee product. (4) Application of statistical tools in controlling product quality coffee and pressing the occurrence of damage to the product. This study aims to determine how the implementation of quality control using statistical tools useful in efforts to control the level of damage to the product in the company. P control chart analysis results indicate that the process is in a state of uncontrolled or still experiencing irregularities. Based on Pareto diagram, priority repairs that need to be done is for the dominant type of damage that the black seed (25.68%), broken seeds (19.23%), brown seeds (17.60%) and more than a hollow seeds (15.99%). the causal diagram analysis can be seen from the factors that cause damage to human factors/workers, machine production, work methods, materials/raw materials and the work environment, so the company can take precautions and repair the damage.
The effect of alpha fetoprotein on NF-κB translocation in lipopolysaccharide induced monocyte-derived dendritic cell Budiyati, Akterono D.; Setiyono, Agus; Tarigan, Elpita; Wibowo, Heri
Medical Journal of Indonesia Vol 21, No 2 (2012): May
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (728.953 KB) | DOI: 10.13181/mji.v21i2.484

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Background: Alpha fetoprotein (AFP) is a tumor-associated Ag that has a function in both ontogenic and oncogenic growth and its serum level is elevated in patients with hepatocellular carcinoma (HCC). A recent study showed that the immunoregulatory effect of AFP was through impairment of dendritic cell function as antigen presenting cell (APC), a mechanism that is known to hamper efficient antitumor response. However, the underlying intracellular mechanism of action of AFP required elucidation. As an initial step to determine the signaling pathway of AFP, we analyzed whether LPS induced NF-κB translocation occured in AFP-treated monocyte-derived dendritic cell (MDDC), which was induced by lipopolysaccharide (LPS).Methods: Monocytes were cultured in GM-CSF (800 ng/mL) and IL-4 (1000 ng/mL) containing medium and incubated for six days to generate immature MDDCs with or without the presence of AFP. Mature MDDC was generated by stimulation of the immature MDDC with LPS for another 30 minutes. The analysis of NF-κB translocation was measured by fluorescent microscopy.Results: Following activation of MDDC by LPS, the control group showed a marked nuclear staining of NF-κB. However, the AFP-treated group showed negative nuclear staining similar as observed in unactivated MDDC.Conclusion: This study demonstrated that AFP prevented the activation and nuclear translocation of NF-κB and subsequently might cause the impairment of MDDC function as APC. This finding provides a new insight on the role of AFP in the suppression mechanism of anti tumor immune response. (Med J Indones. 2012;21:97-101)Keywords: Alpha fetoprotein, dendritic cell, lipopolysaccharide, NF-κB translocation
Treatment of Wuchereria kalimantani infection in Presbytis cristata with a single dose of CGI 18041 Supali, Taniawati; Rukmono, Bintari; Wibowo, Heri; Ekarina, Rita; Kurniawan, Agnes; Wardhani, Endang S.; Purnomo, Purnomo; Haerani, Tjahaya; Partono, Felix
Medical Journal of Indonesia Vol 6, No 1 (1997): January-March
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (466.467 KB) | DOI: 10.13181/mji.v6i1.800

Abstract

[no abstract available]
HUBUNGAN ANTARA INFEKSI CACING DAN ALERGI Yolazenia, Yolazenia; Supali, Taniawati; Wibowo, Heri
Jurnal Ilmu Kedokteran Vol 4, No 2 (2010): Jurnal Ilmu Kedokteran
Publisher : Fakultas Kedokteran Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (39.246 KB) | DOI: 10.26891/JIK.v4i2.2010.71-78

Abstract

Many researches showing the evidence of a reverse relation between helminthiasis and allergic diseases in tropicaldeveloping countries, supported by hygiene hypothesis. There is relationship between the inflammation caused byallergic and helminthiasis. Both, allergic and helminthiasis, show the increase of IgE level, eosinophilia, mastocytosis,and release of IL-4, IL-5 and IL-13 cytokines by Th2. Several mechanisms explaining the decrease of allergicmanifestation in people with helminthiasis are polyclonal IgE blocking, suppression of anti-inflammatory cytokines(IL-10 and TGF-â), and IgG4 blocking antibody.
EFFECT OF HUMIC ACID AND MOLYBDATE ON PHOSPHATE ADSORPTION IN TYPIC HAPLUDULT OF CIGUDEG, BOGOR Wibowo, Heri; Purwanto, Benito Heru; Notohadisuwarno, Supriyanto
Jurnal Ilmu Pertanian Vol 2, No 3 (2017): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.31093

Abstract

Humic acids containing carboxyl and hydroxyl groups that have the ability to cover the P adsorption  site in Typic Hapludults. Molybdate has similarity behaviour with phosphate in theacid soils. Research aim was to study the effects of molybdate and humic acid to the kinetics of phosphate adsorption in Typic Hapludults of Cigudeg, Bogor. Important of kinetics is to get accuration of materials transport, to control influence on anion mobility, that the assessment is needed for the efficient application of Mo and P. Aplication humic acid and molybdate as competitor anion of phosphate was conducted with combination of humic acid and Mo concentration as double anions. Many models describe the kinetics for the adsorption of phosphate by soils i.e. zero order, first order, second order, and Elovich. As ststistically, there was not interaction of humic acid and molybdate on P adsorption. Application of humic acid with rate of 100 mg.L-1 was not effective decrease P adsorption in Typic Hapludults. It was due to the pH of the adsorption system that get near to its pKa of carboxyl gruop about 5. Meanwhile aplication 2 and 5 mmol.L-1 of molybdate significantly decrease of P adsorption. The second order kinetics models apropriate to the adsorptionof P in the Typic Hapludults of Cigudeg, with determination coefficients value (R2) of  0.999-1 and standard error  value (SE) of 0.001?0.011.The results suggest that the molybdate as competitor anion affected the kinetics for the adsorption of phosphate due to the charge of molybdate.
THE UTILIZATION OF GLYCEROL, BIODIESEL SIDE PRODUCT OF USED COOKING OIL AS GLYCEROL ACETATE MATERIAL SYNTHESIS Wibowo, Heri
Jurnal Penelitian Saintek Vol 20, No 2: Oktober 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v20i2.9600

Abstract

The research aimed at using glycerol of biodiesel synthesis side product from used cooking oil as glycerol acetate material synthesis, and charactering synthesized material based on data of IR spectroscopy and GCMS. The method used to synthesize glycerol acetate was re? ux during 50 minute at 80 C. Glycerol from biodiesel synthesis side product from used cooking oil was puri? ed with acetic anhydride reacted at 80 0 C, for 50 minutes. The synthesis product was characterized by IR and GCMS spectroscopies. The result of this research shows that glycerol derived from synthesizing glycerol 1?monoacetate and glycerol 2-monoacetate in the form of yellow liquid with 145 148 0 0 C boiling point, soluble in ethanol and insoluble in n-hexane. IR spectrum shows the presence of C=O carbonyl, C-O ester, -OH, and C-H aliphatic group; GCMS spectrum shows a mixture from two glycerol monoacetate with SI (Similiar Index) of 97 and 93.