The Effect of Some Urinary Constituents on the in Vitro Nucleation and Growth Kinetics of Calcium Oxalate

Urolithiasis ◽  
1981 ◽  
pp. 641-650 ◽  
Author(s):  
A. Rodgers ◽  
J. Garside
2013 ◽  
Vol 378 ◽  
pp. 115-120 ◽  
Author(s):  
I. Dyamant ◽  
A.S. Abyzov ◽  
V.M. Fokin ◽  
E.D. Zanotto ◽  
J. Lumeau ◽  
...  

2021 ◽  
Vol 70 (9) ◽  
Author(s):  
Vidula Iyer ◽  
Janhavi Raut ◽  
Anindya Dasgupta

The pH of skin is critical for skin health and resilience and plays a key role in controlling the skin microbiome. It has been well reported that under dysbiotic conditions such as atopic dermatitis (AD), eczema, etc. there are significant aberrations of skin pH, along with a higher level of Staphylococcus aureus compared to the commensal Staphylococcus epidermidis on skin. To understand the effect of pH on the relative growth of S. epidermidis and S. aureus , we carried out simple in vitro growth kinetic studies of the individual microbes under varying pH conditions. We demonstrated that the growth kinetics of S. epidermidis is relatively insensitive to pH within the range of 5–7, while S. aureus shows a stronger pH dependence in that range. Gompertz’s model was used to fit the pH dependence of the growth kinetics of the two bacteria and showed that the equilibrium bacterial count of S. aureus was the more sensitive parameter. The switch in growth rate happens at a pH of 6.5–7. Our studies are in line with the general hypothesis that keeping the skin pH within an acidic range is advantageous in terms of keeping the skin microbiome in balance and maintaining healthy skin.


1987 ◽  
Vol 115 (2) ◽  
pp. 372-377 ◽  
Author(s):  
L Durai ◽  
R Dhanasekaran ◽  
P Ramasamy

1994 ◽  
Vol 144 (3-4) ◽  
pp. 281-290 ◽  
Author(s):  
Amarjit J. Mahajan ◽  
Donald J. Kirwan

1970 ◽  
Vol 5 (2) ◽  
pp. 205-211 ◽  
Author(s):  
David S. Yohn ◽  
Fanny R. Marmol ◽  
Richard G. Olsen

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