electrochemical aptamer-based sensors attract a lot of interest as useful methods because of their low cost, accuracy, sensitivity, and simplicity. an electro-active redox molecule comprises the main part of the electrochemical-based sensors. ferrocene is one of the most popular redox molecule used in biosensor fabrication. but, instability of ferrocenium ion in strong nucleophilic reagents and...

an iodide ion-selective pvc membrane sensor based on copper (π)-bis-nphenilsalicyldenaminatocomplex as a novel sensing material is successfully developed. theelectrode showed a good selectivity for iodide ion with respect to common inorganic anions. thesensor exhibited a good linear response with slope of _58.6 ± 0.4 mv per decade over theconcentration range of 5.0 × 10-6 to 1.0 × 10-1 mol l-1,...

The effect of various electrolytes on the adsorption of poliovirus was measured in 250-cm-long soil columns with ceramic samplers at different depths. Viruses suspended in deionized water moved much farther through the soil than those suspended in tap water, whereas movement in sewage water was intermediate. The salt content of the tap water and sewage water promoted virus adsorption, but evide...

Fatty acids classified as chemical penetration enhancers (CPEs) might cause the fluidization and perturbation of stratum corneum (SC) lipid matrix. The penetration of oleic, linoleic, lauric and capric acids into human skin was studied by time-of-flight secondary ion mass spectrometry (TOF-SIMS) imaging and related to fatty acids enhancing effect on lipophilic model drug tolnaftate penetration ...

Abstrak Beton mutu tinggi memerlukan material khusus tambahan salah satunya berupa fly ash dengan maksud meningkatkan kinerja beton. Penelitian ini bertujuan untuk mengetahui pengaruh kehalusan terhadap penetrasi ion klorida beton high volume tinggi. Benda uji menggunakan kadar 50% sebagai substitusi semen variasi lolos ayakan mesh ukuran 200 dan 400. Pengujian meliputi perkembangan kuat tekan ...

Former p~pers from this laboratory indicate that the penetration of a weak base, ammonia,* and of a strong base, guanidine, 2 is probably preceded by a chemical reaction with a constituent of the protoplasm. On the other hand the penetration of a weak acid, hydrogen sulfide, s appears to take place by simple diffusion of molecular hydrogen sulfide through the non-aqueous protoplasm. What is the...

Experiments such as microbial activation culture, subculture selection, and fire damage repair of cement mortar specimens were conducted to investigate the repairing effect Sporosarcina pasteurii a agent for fire-damaged cracks in specimens. In addition, multi-scale parameters compressive strength chloride ion migration coefficient before after restoration compared. The mineralization technolog...

Former p~pers from this laboratory indicate that the penetration of a weak base, ammonia,* and of a strong base, guanidine, 2 is probably preceded by a chemical reaction with a constituent of the protoplasm. On the other hand the penetration of a weak acid, hydrogen sulfide, s appears to take place by simple diffusion of molecular hydrogen sulfide through the non-aqueous protoplasm. What is the...

1. By the use of the silver-silver chloride electrode, measurements have been made of the chloride ion concentrations of 1 per cent solutions of five proteins, containing from 0.001 N to 0.1 N hydrochloric acid. The hydrogen ion concentrations of the same solutions have been measured by the use of the hydrogen electrode. 2. The measurements indicate that the chlorides of gelatin, egg albumin, c...

It is well known that the electric resistivity of concrete is one of the useful durability indicators for chloride induced deterioration of concrete structures. In this study, the influence of air temperature and relative water content ratio in concrete on some measuring results of the electric resistivity was investigated by using the concrete specimens which were exposed in tidal zone. In add...