Aim : This study was aimed to formulate a transdermal matrix patch using green tea leaf extract. Materials and methods The formulation optimized by the simplex lattice design method. correlation between responses analyzed chemometrics. observed were: 1. physical properties of patch, 2. percentage dissolution efficiency catechins, caffeine, epigallocatechin gallate released from patch. determina...

Krim alas bedak adalah jenis riasan dekoratif, yang biasanya mengandung bahan tabir surya. Dibenzalaseton merupakan salah satu agen surya organik potensial. Dalam krim tipe minyak dalam air, tingkat pemulihan fase tidak selalu meningkat bahkan jika konsentrasinya tinggi. Namun, menggunakan kombinasi dua pengemulsi, seperti span 80 dan tween 80, optimal mungkin solusi tepat. Penelitian ini bertu...

Muslim population in Indonesia reaches 87% and is one of the countries with largest muslim according to 2010 census. Thaharah things that Muslims pay much attention to, especially worship. One thaharah washing up from najis mughallazah. Soap skin cleansing preparations has become a public basic needs so innovation soap formulation containing bentonite as component can washed mughallazah make it...

The use of biobased heterogeneous catalysts made from agricultural waste for producing biodiesel has gained attention its potential to create a sustainable and low-cost process. blending two or more biomass residues viable is still in early stages. In this study, Biobased Composite Heterogeneous Catalyst (CHC) was by the shells periwinkle (PWS), melon seed-husk (MSH), locust bean pod-husk (LBP)...

We consider a continuous-time symmetric branching random walk on multidimensional lattice with finite set of particle generation centers, i.e., sources. The existence positive eigenvalue the evolutionary operator means exponential growth first moment total number particles both at an arbitrary point and entire lattice. Branching walks or negative intensities sources that have simplex configurat...

A discrete Fourier analysis on the fundamental domain Ωd of the d-dimensional lattice of type Ad is studied, where Ω2 is the regular hexagon and Ω3 is the rhombic dodecahedron, and analogous results on d-dimensional simplex are derived by considering invariant and anti-invariant elements. Our main results include Fourier analysis in trigonometric functions, interpolation and cubature formulas o...

This article first presents three-level simplex designs of k+1 runs for k factors. Each simplex design is composed of k treatment combinations from a two-level factorial design, plus an additional base run that represents a third level for each factor. These orthogonal, first-order designs are simple to construct. Furthermore, simplex designs can be augmented to construct second-order simplex s...