Vol. 3 No. 2 (2004)

Egg shape of second phase production (40- 70 weeks age) of layer bigger than egg shape of one phase production, but egg shell less thickly so than more perishable. On the other side 3.5-4% Ca in the diet only 50% can be absorbed in the intestinal. Ca absorption and Ca retention can be raised by supplementary zeolite in the diet. This experiment was conducted to observe the effect of supplying zeolite in the diet of 192 lohmann brown layer on the egg quality of second phase production. Different feeding treatment was carried out four each group. Layer in treatment 1 were fed control diet;…

Nitrogen fertilizer is one of the fertilizer type which is required for plant growth. This fertilizer is easily dissolved and the ions are not clay bonded, that it is often washed out by rain, evaporated or changed to other forms which can not be used by plants. In order to increase the efficiency of N-fertilizer, the loss of N must be minimized. In other hand, it is well known that natural zeolites have the capability as adsorbents and cation exchangers, such as for ammonium ion. Investigation has been carried out to analyze the capability of natural zeolite from Cikancra, Tasikmalaya to…

Naturally, zeolite is a cation exchanger but this property is also depending on porosity, tetrahedral density and frame density. Cation exchange effectiveness can be changed by structure, Si/Al ratio and effective pore size. Tetrahedral group, T, in zeolite is negative charged and can be substituted isomorphycally by other group like PO2+. The new structure can be functioned as anion or cation exchanger. The exchange capacity of both ions depends on Si/Al/P ratio from the substitution process. The alumina-silicaphosphate (ASP) compound has been made from zeolite from Cikalong, Tasikmalaya,…

The objective of this study was to evaluate the crop growth of aloe vera by zeolite and organic matters application. This study was conducted in Natar, Lampung Selatan. Treatments were arranged by factorial (5x3) in Randomized Complete Block Design with three replications. First factor were five dosage of zeolit as 0; 75; 150; 225; and 300 kg ha-1. Second factor were three different type of organic matters as: without organic matter, chiken manure, and cow manure. The result showed that zeolite application produced maximum responses for the plant height, petiole leaf fresh weight, thickness…

The zeolite membrane of MFI could be sinthesized on alpha alumina support having an asymmetric structure and a pore diameter of top layer being about 0.1 μm. In this experiment, the method performed was a hydrothermal process being done at temperature 303 K by using Silica colloidal with the the composition of 30% SiO2, 0.04% Al2O3, 0.4% Na2O and NaOH 4N. The membranes produced were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray diffraction (XRD), Energy Dispersive X-ray Spectrofotometer (EDX) and gas permeation, which use some pure gases such as carbon…

The research was aimed to investigate the application of zeolite spreading frequency in related to control housing quality. In this study, three aspects of quality were observed namely housing temperature, litter temperature and litter humidity. The result indicated that spreading frequency was only significant effective in controlling litter humidity. Treatment of P3 significantly (P