Potential use of oil palm sap on lactic acid production and product adsorption on Dowex™ 66 resin as adsorbent

2012 ◽  
Vol 8 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Supasit Chooklin ◽  
Lupong Kaewsichan ◽  
Jasadee Kaewsrichan
Keyword(s):  
Lactic Acid ◽  
Oil Palm ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Potential Use

Ethanol and lactic acid production using sap squeezed from old oil palm trunks felled for replanting

2010 ◽  
Vol 110 (3) ◽  
pp. 322-325 ◽  
Author(s):  
Akihiko Kosugi ◽  
Ryohei Tanaka ◽  
Kengo Magara ◽  
Yoshinori Murata ◽  
Takamitsu Arai ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Oil Palm ◽  
Acid Production ◽  
Lactic Acid Production

LACTIC ACID PRODUCTION FROM CASSAVA MILL EFFLUENT (CME) USING RHIZOPUS ORYZAE IMMOBILISED IN PVA-ALGINATE SULPHATE BEADS

2015 ◽  
Vol 77 (31) ◽  
Author(s):  
Qistina Ahmad Kamal ◽  
Nor Azimah Mohd Zain
Keyword(s):  
Lactic Acid ◽  
Acid Production ◽  
Rhizopus Oryzae ◽  
Lactic Acid Production ◽  
Oxygen Demand ◽  
Fermentation Medium ◽  
Agitation Speed ◽  
High Concentration ◽  
Peeling Off ◽  
Potential Use

Cassava mill effluent (CME) is an effluent originated from tapioca tuber. It is produced by peeling off the skin, cutting and starch extraction. CME contains high concentration of starch, hence when it is disposed directly into the river, it will contribute to water pollution due to its high content of chemical oxygen demand (COD), biological oxygen demand (BOD), and total solids (TS). In this study, CME was used as a fermentation medium to produce lactic acid. To improve the yield, spores of Rhizopus oryzae were immobilised in PVA-alginate-sulphate beads and fermentation was carried out for 6 days. 2-level factorial design was used in the screening of lactic acid production for different parameters; temperature (30°C - 40°C), agitation speed (120-200 rpm), pH (4-7) and beads percentage (5-10% (w/v)). Analysis of variance (ANOVA) showed significant influence of the tested factors and their interactions on the production of lactic acid (p<0.0001), except for pH with (p=0.0670). The regression model for lactic acid production fitted the data adequately and explained the variation of more than 99% in the response. The result showed that the maximum production of lactic acid (8.54 g/L) could be achieved at the initial fermentation medium of pH 7.0, temperature of 40°C, percentage of beads of 10% (w/v) and agitation speed of 200 rpm. This study intends to exploit the potential use of CME for the production of lactic acid with the hope of contributing to Malaysia’s bioeconomy.

scholarly journals Protective effect of titanium tetrafluoride and silver diamine fluoride on radiation-induced dentin caries in vitro

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Beatriz Martines de Souza ◽  
Mayara Souza Silva ◽  
Aline Silva Braga ◽  
Patrícia Sanches Kerges Bueno ◽  
Paulo Sergio da Silva Santos ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Protective Effect ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Negative Control ◽  
Titanium Tetrafluoride ◽  
Silver Diamine Fluoride ◽  
Dentin Caries ◽  
Radiation Induced

AbstractThis in vitro study evaluated the protective effect of titanium tetrafluoride (TiF4) varnish and silver diamine fluoride (SDF) solution on the radiation-induced dentin caries. Bovine root dentin samples were irradiated (70 Gy) and treated as follows: (6 h): 4% TiF4 varnish; 5.42% NaF varnish; 30% SDF solution; placebo varnish; or untreated (negative control). Microcosm biofilm was produced from human dental biofilm (from patients with head-neck cancer) mixed with McBain saliva for the first 8 h. After 16 h and from day 2 to day 5, McBain saliva (0.2% sucrose) was replaced daily (37 °C, 5% CO2) (biological triplicate). Demineralization was quantified by transverse microradiography (TMR), while biofilm was analyzed by using viability, colony-forming units (CFU) counting and lactic acid production assays. The data were statistically analyzed by ANOVA (p < 0.05). TiF4 and SDF were able to reduce mineral loss compared to placebo and the negative control. TiF4 and SDF significantly reduced the biofilm viability compared to negative control. TiF4 significantly reduced the CFU count of total microorganism, while only SDF affected total streptococci and mutans streptococci counts. The varnishes induced a reduction in lactic acid production compared to the negative control. TiF4 and SDF may be good alternatives to control the development of radiation-induced dentin caries.

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