The transition of rodlike micelles to wormlike micelles of an ionic liquid surfactant induced by different additives and the template-directed synthesis of calcium oxalate monohydrate to mimic the formation of urinary stones

2021 ◽  
Author(s):  
Yimin Hu ◽  
Yu Chen ◽  
Zixian Cai ◽  
Lei Fan ◽  
Jie Han ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Urinary Stones ◽  
Wormlike Micelles ◽  
Directed Synthesis ◽  
Ionic Liquid Surfactant

scholarly journals Urolithiasis in male patients: A pilot study on the ethnic differences and clinical profile

2014 ◽  
Vol 4 (4) ◽  
pp. 393-98
Author(s):  
Jayadevan Sreedharan ◽  
LJ John ◽  
HAM Aly Freeg ◽  
J Muttappallymyalil
Keyword(s):  
Uric Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Dietary Factors ◽  
Clinical Profile ◽  
Urinary Stones ◽  
Ureteral Stones ◽  
Stone Size ◽  
Uric Acid Stones ◽  
Male Patients

Background   Ethnicity play a role in the occurrence of urinary stones, probably related to climatic, environmental and dietary factors in ethnic groups. The association between ethnicity, age, clinical profile, stone size with type of ureteric stones among males with urolithiasis was studied.   Materials and Methods Male patients (>18 years) with lower ureteral stones size <10mm attending outpatient department of Urology, at a private hospital, Ajman over a period of one year were included. Ethics approval was obtained from Institutional Ethics Committee. Data was retrieved from the case records which included socio-demographic variables (age, ethnicity), clinical profile (ureteric colic, duration of pain, other complaints), and laboratory investigations (type of stone, stone size). Descriptive and inferential statistics were performed with SPSS-20 and p values <0.05 considered significant. Results 185 male patients were included. Mean age was 41.5 (7.3) years, range (22-71) years. Out of the total, 81 (43.8%) patients were Asians, 81(43.8%) Arabs and 23 (12.4%) were of other ethnicity. Most patients (95.1%) presented with ureteric pain. 49 (26.5%) had family history of stone disease where calcium oxalate monohydrate and uric acid stones were common, with majority being first degree relation. Data on stone type was available for 90 patients; of which, 21 were calcium oxalate monohydrate, 33-calcium oxalate dehydrate, 24-uric acid and remaining 12 other form of stones. Average age for different types of stone was 38.3, 41.6, 39.4 and 42.8 years for calcium oxalate monohydrate, calcium oxalate dehydrate, uric acid and other types respectively. Conclusion Uric acid stones were more prevalent among Asians and calcium oxalate-dehydrate stones among Arabs. Future studies can be conducted among multiethnic population focusing on dietary pattern and stone analysis.DOI: http://dx.doi.org/10.3126/nje.v4i4.11359 Nepal Journal of Epidemiology 2014; 4(4):393-98

The wormlike micelles formed using an ionic liquid surfactant and polar organic solvents at low temperature without additives and their lubricant properties

Soft Matter ◽  
2021 ◽  
Author(s):  
Huijiao Cao ◽  
Wenlin Xu ◽  
Xia Guo
Keyword(s):  
Ionic Liquid ◽  
Low Temperature ◽  
Organic Solvent ◽  
Organic Solvents ◽  
Wormlike Micelles ◽  
Polar Organic Solvents ◽  
Ionic Liquid Surfactant ◽  
Nonpolar Organic

Wormlike micelles (or reverse wormlike micelles) are flexible cylindrical chains that are normally formed in water (or a nonpolar organic solvent) at 25.0 °C or above; the formation of wormlike micelles at lower temperatures is rare.

Epitaxial Relationships in Urolithiasis: The Calcium Oxalate Monohydrate—Hydroxyapatite System

1975 ◽  
Vol 49 (5) ◽  
pp. 369-374 ◽  
Author(s):  
J. L. Meyer ◽  
J. H. Bergert ◽  
L. H. Smith
Keyword(s):  
Calcium Phosphate ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Chemical Kinetic ◽  
Urinary Stones ◽  
Supersaturated Solution ◽  
Phosphate Solution ◽  
Epitaxial Relationship ◽  
Experimental Conditions ◽  
Seed Crystals

Chemical kinetic data, complemented with scanning electron-microscope observations of the crystalline phase, show that seed crystals of hydroxyapatite have the ability to induce the growth of calcium oxalate monohydrate crystals epitaxially from a metastable supersaturated solution of calcium oxalate. The rate of growth of calcium oxalate crystals is dependent on the surface area of the seed material and follows a second-order rate law. It is suggested that there may be a causal relationship between the occurrence of apatite crystals in the urinary tract and the formation of both ‘pure’ and mixed urinary stones containing calcium oxalate. Under similar experimental conditions, however, seed crystals of calcium oxalate monohydrate appeared unable to induce epitaxially the growth of calcium phosphate crystals from a supersaturated calcium phosphate solution, indicating the absence of an epitaxial relationship between calcium oxalate monohydrate and the initially precipitating calcium phosphate phase(s).

scholarly journals Time Changes in the Spectrum of Urinary Stone Composition: A Role for Climate Variations?

2020 ◽  
Author(s):  
Alberto Trinchieri ◽  
Alessandro Maletta ◽  
Giovanni Simonelli ◽  
Luca Boeri ◽  
Elisa De Lorenzis ◽  
...  
Keyword(s):  
Uric Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Urinary Stone ◽  
Northern Italy ◽  
Urinary Stones ◽  
Temperate Climate ◽  
Stone Composition ◽  
Statistical Institute ◽  
Time Changes

Abstract Introduction: An increase of the frequency of uric acid urinary stones compared to calcium-containing ones has been recently described. This study was aimed at assessing the frequency of different types of urinary stones in the population of northern Italy in the period 2016-18 compared to 2001-2003. Materials and Methods: Analyses by infrared spectroscopy of 1007 stones endoscopically removed at two institutions in the area of Milan (Northern Italy) were retrospectively considered. Stones were classified as calcium oxalate monohydrate (COM) and dihydrate (COD), mixed uric acid/calcium oxalate (UC); uric acid (UA), struvite (ST); apatite (CAP); mixed calcium oxalate / apatite (CAPOX); others. The patients were divided into two groups: 2001-2003 and 2016-2018. The average temperature values of the region over the two time periods were obtained by the national statistical institute. Results: The average age of the 2001-2003 group (45.8+/-15.4 years) was significantly lower than the average age of the 2016-18 group (57.9+/-14.8) (0.000). M / F ratio was similar in the two groups: 119 / 69 (1:0.58) in 2001-2003 MI and 527 / 292 (1:0.55) in 2016-18 (p = 0.862). COM stones tended to more frequent in 2016-18 group than in 2001-03. COD stones were significantly more frequent in 2001-03 than in 2016-18. ST stone frequency was increased from 2001-03 to 2016-18. No increase of uric acid containing stones was observed in 2016-18. Results were confirmed after adjustment by age. Averages annual regional temperatures increased from 14° C to 15.4° C during the two observation periods. Conclusions: No increase of UA stones was observed, probably due to the limited impact of the global warming in our temperate climate.

scholarly journals Effect of Climate on Time Changes in the Spectrum of Urinary Stone Composition

2020 ◽  
Author(s):  
Alberto Trinchieri ◽  
Alessandro Maletta ◽  
Giovanni Simonelli ◽  
Luca Boeri ◽  
Elisa De Lorenzis ◽  
...  
Keyword(s):  
Uric Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Urinary Stone ◽  
Northern Italy ◽  
Urinary Stones ◽  
Temperate Climate ◽  
Stone Composition ◽  
Average Temperature ◽  
Time Changes

Abstract Background: An increase of the frequency of uric acid urinary stones compared to calcium-containing ones has been recently described. This study was aimed at assessing the frequency of different types of urinary stones in the population of northern Italy in the period 2016-18 compared to 2001-2003.Methods: Analyses by infrared spectroscopy of 1007 stones endoscopically removed at two institutions in the area of Milan (Northern Italy) were retrospectively considered. Stones were classified as calcium oxalate monohydrate (COM) and dihydrate (COD), mixed uric acid/calcium oxalate (UC); uric acid (UA), struvite (ST); apatite (CAP); mixed calcium oxalate / apatite (CAPOX); others. The patients were divided into two groups: 2001-2003 and 2016-2018. The average temperature values of the region over the two time periods were obtained by the national statistical institute.Results: The average age of the 2001-2003 group (45.8+/-15.4 years) was significantly lower than the average age of the 2016-18 group (57.9+/-14.8) (0.000). M / F ratio was similar in the two groups: 119 / 69 (1:0.58) in 2001-2003 and 527 / 292 (1:0.55) in 2016-18 (p = 0.862). COM stones tended to more frequent in 2016-18 group than in 2001-03. COD stones were significantly more frequent in 2001-03 than in 2016-18. ST stone frequency was increased from 2001-03 to 2016-18. No increase of uric acid containing stones was observed in 2016-18. Results were confirmed after adjustment by age. Averages annual regional temperatures increased from 14° C to 15.4° C during the two observation periods.Conclusions: No increase of UA stones was observed, probably due to the limited impact of the global warming in our temperate climate.

Vickers Hardness Studies of Calcium Oxalate Monohydrate and Brushite Urinary Stones

2006 ◽  
Vol 20 (1) ◽  
pp. 59-63 ◽  
Author(s):  
N. Bouropoulos ◽  
D.E. Mouzakis ◽  
G. Bithelis ◽  
E. Liatsikos
Keyword(s):  
Calcium Oxalate ◽  
Vickers Hardness ◽  
Calcium Oxalate Monohydrate ◽  
Urinary Stones

scholarly journals URINARY BLADDER STONE

2018 ◽  
Vol 25 (11) ◽  
pp. 1655-1659
Author(s):  
Mubeena Laghari ◽  
Shazia Murtaza ◽  
Rafique Ahmed JalbanI
Keyword(s):  
Urinary Bladder ◽  
Calcium Oxalate ◽  
Pediatric Surgery ◽  
Calcium Oxalate Monohydrate ◽  
Urinary Stones ◽  
Female Ratio ◽  
Bladder Stones ◽  
Ammonium Hydrogen ◽  
One Year ◽  
Male To Female

Objective: To analyze the biochemical composition and biochemical types ofurinary bladder stones in children. Study design and setting: Observational study, Departmentof Pediatric Surgery, Liaquat University of Medical and Health Sciences, Jamshoro/Hyderabad.Place and Duration: One year duration from January to December 2006. Materials &Methods: A sample of 30 children was selected according to criteria of inclusion of age <10years of urinary bladder stones without any anomaly. Urinary bladder stones were washed indistilled H2O deionized to remove contaminations. Urinary bladder stones were dried at 1000C for overnight in an oven. The urinary bladder stones cut into pieces were used for the FTIRspectroscopy analysis, carried out on “Nicolet Avatar 330 FTIR spectrophotometer”. Data wasanalyzed on SPSS 22.0 at 95% confidence interval. Results: Of 30, 6 (20%) were female and24 (80%) were male. The male dominancy was noted with male to female ratio of 4:1. Mean±SD age was noted as 4.839 + 2.819 years. Urinary stones of pure and mixed biochemistrywere noted in 5 (16.6%) and 25 (83.3%) respectively (P=0.0001). Most frequent urinary bladderstone found was the calcium oxalate monohydrate - ammonium hydrogen urate. Conclusions:Most frequent type of urinary bladder stones was the calcium oxalate monohydrate–ammoniumhydrogen urate type in the children.

scholarly journals Time changes in the spectrum of urinary stone composition: a role for climate variations?

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Alberto Trinchieri ◽  
Alessandro Maletta ◽  
Giovanni Simonelli ◽  
Luca Boeri ◽  
Elisa De Lorenzis ◽  
...  
Keyword(s):  
Uric Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Urinary Stone ◽  
Northern Italy ◽  
Urinary Stones ◽  
Temperate Climate ◽  
Stone Composition ◽  
Statistical Institute ◽  
Time Changes

Abstract Background An increase of the frequency of uric acid urinary stones compared to calcium-containing ones has been recently described. This study was aimed at assessing the frequency of different types of urinary stones in the population of northern Italy in the period 2016–18 compared to 2001–2003. Methods Analyses by infrared spectroscopy of 1007 stones endoscopically removed at two institutions in the area of Milan (Northern Italy) were retrospectively considered. Stones were classified as calcium oxalate monohydrate (COM) and dihydrate (COD), mixed uric acid/calcium oxalate (UC); uric acid (UA), struvite (ST); apatite (CAP); mixed calcium oxalate / apatite (CAPOX); others. The patients were divided into two groups: 2001–2003 and 2016–2018. The average temperature values of the region over the two time periods were obtained by the national statistical institute. Results The average age of the 2001–2003 group (45.8+/− 15.4 years) was significantly lower than the average age of the 2016–18 group (57.9+/− 14.8) (0.000). M / F ratio was similar in the two groups: 119 / 69 (1,0.58) in 2001–2003 and 527 / 292 (1,0.55) in 2016–18 (p = 0.862). COM stones tended to more frequent in 2016–18 group than in 2001–03. COD stones were significantly more frequent in 2001–03 than in 2016–18. ST stone frequency was increased from 2001 to 03 to 2016–18. No increase of uric acid containing stones was observed in 2016–18. Results were confirmed after adjustment by age. Averages annual regional temperatures increased from 14 °C to 15.4 °C during the two observation periods. Conclusions No increase of UA stones was observed, probably due to the limited impact of the global warming in our temperate climate.

The influence of matrix content on stone hardness and fragility to ESWL in calcium oxalate monohydrate urinary stones

2002 ◽  
Vol 1 (1) ◽  
pp. 146
Author(s):  
Judy Kleinmann ◽  
Lia Addadi ◽  
Amnon Zisman ◽  
Yoram Siegel ◽  
Arie Lindner
Keyword(s):  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Urinary Stones
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