scholarly journals Criterion for the Quantitative Assessment of Ideal Conditions in Chromatography

1989 ◽  
Vol 6 (4) ◽  
pp. 212-218 ◽  
Author(s):  
A. V. Larin

The quantitative relationship between the plate theory variant model of equilibrium adsorption in which time is the only independent variable and the theory of ideal chromatogaphy has been evaluated. It has been shown that an approach to ideal conditions depends directly on an increase in the relative (or absolute) length of the column. Practical recommendations on the choice and assessment of conditions to verify the measurement of adsorption isotherms and on the calculation of chromatographic processes in accordance with the theory of ideal chromatography are given.

2019 ◽  
Vol 64 (3) ◽  
pp. 1063-1071 ◽  
Author(s):  
Karen N. Son ◽  
Tra-My Justine Richardson ◽  
Gregory E. Cmarik

Fuel ◽  
1987 ◽  
Vol 66 (9) ◽  
pp. 1171-1175 ◽  
Author(s):  
S ALLEN

2016 ◽  
Vol 1 (1) ◽  
pp. 18-26
Author(s):  
Damaranie Dipahayu ◽  
Bambang Soekardjo ◽  
Ruly Susilowati

ABSTRAKPenelitian ini bertujuan untuk mencari hubungan kuantitatif antara parameter sifat lipofilik ((π Hansch), elektronik (σ Hammet) dan sterik (ES Taft) dengan aktivitas antibakteri yang ditunjukkan dengan diameter daerah hambatan Pseudomonas aeroginosa ATCC 90277 dari turunan N-Benzoil Sefaleksin. Turunan N-Benzoil Sefaleksin yang digunakan dalam penelitian ini adalah N- Benzoil sefaleksin; N-[4- metilbenzoil] sefaleksin; N-[4- klorobenzoil] sefaleksin and N-[3,4- diklorobenzoil] sefaleksin. Aktivitas antibakteri dilakukan secara uji mikrobiologi menggunakan difusi silinder logam pada media Antibiotika-1. Data penelitian dianalisa secara regresi dengan derajat kepercayaan (α = 0,05). Hasil penelitian menunjukkan bahwa terdapat hubungan yang liner antara variabelbebas yaitu parameter sifat lipofilik ((π Hansch), elektronik (σ Hammet) dan sterik (ES Taft) dari turunan NBenzoil Sefaleksin dengan variabel tergantung yaitu diameter daerah hambatan pertumbuhan bakteriPseudomonas aeroginosa ATCC 90277. Hubungan tersebut dinyatakan dengan suatu persamaan.Kata kunci : turunan N-Benzoil Sefaleksin, lipofilik (π Hansch), elektronik (σ Hammet),sterik (ES Taft), hubungan kuantitatif struktur dan aktivitas, diameter zona hambatABSTRACTThe aims of this research are to studies the quantitative relationship between lipophilicity (π Hansch); electronicity (σ Hammet); stericity (ES Taft) parameters and antibacterial activity of N- Benzoil cephalexin derivate (inhibit area diameter) on Pseudomonas aeroginosa ATCC 90277. The N- Benzoil cephalexin derivate which used in this research are N- Benzoil cephalexin; N-[4- methylbenzoil] cephalexin; N-[4- chlorobenzoil] cephalexin and N- [3,4- dichlorobenzoil] cephalexin. Antibacterial activity was done through assessment microbiological using metal cylinder diffusion on antibiotic-1 media.The experimental data was carried out by regression analyzed with α = 0.05. The result showed that there are linier relationship between lipophilicity (π Hansch); electronicity (σ Hammet); stericity (ES Taft) parameters of N- Benzoil cephalexin derivate (as independent variable) and inhibitation zone (diameter against Pseudomonas aeroginosa ATCC 90277 as dependent variable). The relationship are represented by equation.Keywords : N- Benzoil cephalexin derivate (lipophilicity (π Hansch), electronicity (σ Hammet) and stericity (ES Taft) parameter); quantitative structure activity relationship; antibacterial activity (inhibit area diameter)


Langmuir ◽  
1995 ◽  
Vol 11 (8) ◽  
pp. 3177-3183 ◽  
Author(s):  
Elias I. Franses ◽  
Faisal A. Siddiqui ◽  
Dong June Ahn ◽  
Chien-Hsiang Chang ◽  
Nien-Hwa Linda Wang

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