Perbaikan Mutu Fraksi Kerosin melalui Proses Adsorpsi oleh Karbon Aktif

Proses adsorpi menggunakan karbon aktif telah digunakan untuk mengurangi kandungan senyawa sulfur dan meningkatkan kualitas warna pada fraksi kerosin. Hasil penelitian menunjukkan bahwa berat karbon aktif dan waktu kontak optimum pada proses adsorpsi adalah 150 gram dan 80 menit dengan pengurangan kandungan sulfur 32,2 % sedangkan kualitas warna meningkat 87,5 % dengan demikian proses adsorpsi oleh karbon aktif lebih efektif dalam meningkatkan kualitas warna fraksi kerosin

Perbedaan Perkembangan Motorik Kasar, Motorik Halus, Bahasa, Dan Personal Sosial Pada Anak Stunting Dan Non Stunting

Latar Belakang : Kegagalan pertumbuhan (stunting) pada anak usia di bawah lima tahun dapat menyebabkan berbagai macam gangguan perkembangan, termasuk perkembangan motorik kasar, motorik halus, bahasa, dan personal sosial. Beberapa penelitian menunjukkan hasil yang berbeda, dimana status gizi (stunting) tidak berhubungan dengan perkembangan anak. Penelitian ini bertujuan untuk melihat perbedaan perkembangan pada anak stunting dan non stunting.Metode : Penelitian obeservasional dengan pendekatan cross sectional, bertempat di Keluarahan Jangli Semarang dengan jumlah sampel 49 anak (11 stunting dan 38 non stunting) berusia 24-59 bulan yang dipilih dengan simple random sampling. Data yang dikumpulkan meliputi data karakteristik subyek, karakteristik ibu, status gizi, dan perkembangan anak. Status gizi diukur dengan membandingkan tinggi badan dengan umur, dan data perkembangan anak diukur dengan Kusioner Pra-Skrining Perkembangan (KPSP). Hasil : Hasil penelitian menunjukkan bahwa sebanyak 22,4% anak tergolong stunting.Status perkembangan kategori mencurigakan pada anak stunting lebih tinggi (72,2%) dibandingkan dengan non stunting (31,6%).Terdapat perbedaan perkembangan pada anak stunting dan non stuntingdengan nilai p 0,033. Jenis perkembangan pada anak stunting yang masuk pada kategori mencurigakan secara berturut-turut meliputi perkembangan personal sosial (87,5%), bahasa (75%), motorik kasar (25%), dan motorik halus (12,5%).Simpulan : Terdapat perbedaan perkembangan pada anak stunting dan non stunting, meliputi perkembangan motorik kasar, motorik halus, bahasa dan personal sosial

Group divisible designs with block-size four

AbstractIt is proved that the obvious necessary conditions for the existence of a group divisible design with k = 4 are sufficient, except for the cases corresponding to the non-existing transversal designs T[4, 1; 2] and T[4, 1; 6]

Pembuatan Teh Herbal Campuran Kelopak Bunga Rosella (Hibiscus Sabdariffa) Dan Herba Seledri (Apium Graveolens)

Rosella calyx (Hibiscus sabdariffa) has been reported exhibited on decreasing high blood pressure activity. Celery herb (Apium graveolens) has been acknowledged as an antihypertension herb with vasodilator and diuretic effect. Combination of theextracts was expected to provide synergism effect on decreasing high blood pressure.This study was intended to prepare the combination of herbal tea from standardized extracts of rosella calyx and celery herb. Standardization of rosella calyx and celery herb included determination of several specific and non-specific parameters. Three different formulas of herbal tea were prepared that would be hedonically tested to obtain the most favorable herbal tea formula from the 30 panelists. The most favorableformula was formula C which contained rosella calyx (2 gram) and celery herb (0.5 gram)

Characteristics of Farmers and Technical Efficiency in Cocoa Farming at Sigi Regency - Indonesia with Approach Stochastic Frontier Production Function

This research used cross section data to analyze the factors that affected the production and technical efficiency in the cocoa farming.  The Sampling was done by simple random and the size of samples were 98 cocoa farmers.  Analysis of the stochastic frontier production function with Cobb-Douglas models were used to answer the research objectives.  The results showed fertilizer, pesticide and labor significant effect on cocoa production.  Farmer characteristics such as education, farming experience, and frequency of follow counseling could help to increase the technical efficiency so that  the cocoa production could be increased. Keywords: production, technical efficiency, coco

Karakterisasi Ekstrak Etanolik Daun Asam Jawa (Tamarindus Indica L.)

Leaves of tamarind (Tamarindus indica L.) has been traditionally used to treat some diseases such as: constipation, dyspepsia, flatulence and urinary tract infection.  Theleaves extract also reported has antibacterial and antidiabetic activities. It is essential to determine its specific and non specific parameters in assesing the quality and safety.The samples collected from three different perferctures. Grounded samples were macerated with ethanol. The extracts were subjected to determine its characteristic parameters. Parameter of quality for the extracts consisted of water content, ethanol-extractive, water-extractive, loss on drying, total ash, acid-insoluble ash, solvent residue and heavy metal content. Phytochemical identification showed that the ex-tract contains flanovoid, tannin, glycosides, and saponin. TLC chromatogram using chloroform-methanol-water (80:12:2) as mobile phase, exhibited 4 spots after sprayed with iron(III) chloride. Total phenolic was determined spectrophotometrically usingFolin Ciocalteu reagent, gave 0.35-8.24% total phenolic as gallic acid

Painting process improvement through six sigma approach in a Malaysian vehicle assembly company

Painting is an important process in the automotive assembly to give more attractive appearance to the vehicles and to provide the layer of protection against corrosion and weathering. The objective of this paper is to identify and analyze the factors affecting the quality of painting process at Company RST’s Paint Shop. The paint shop was unable to perform the painting process satisfactorily and deliver the painted vehicle bodies as per customer specifications. The study concentrated on the fiber defect detected at Top Coat Area as the major problem of paint deficiency. Using activities like Genba investigation, data collection, trials and data analysis, the root causes of the problem were identified. Six Sigma DMAIC approach was utilized in conducting the improvement activities. Through designed experiments conducted to determine the best parameter setting of the spray gun used in the painting process, it was found that 3.5 bars for air pressure and 450 ml/minutes for fluid delivery resulted in the lowest paint defect. The use of Six Sigma DMAIC approach had succeeded in helping the company to minimize paint fiber defect per unit (DPU) from 10 to less than 3 DPU. The results from the study have provided an insight on successful deployment of DMAIC through application of its various statistical tools and techniques, and as the systematic problem-solving framework on solving actual industrial issues such as automotive painting problem