scholarly journals Yellow Pigment Production by Pseudomonas geniculata in Maple Sap

1964 ◽  
Vol 12 (3) ◽  
pp. 287-288
Author(s):  
A. E. Wasserman
Keyword(s):  
Yellow Pigment ◽  
Pigment Production ◽  
Maple Sap

Investigating the influence of pH, temperature and agitation speed on yellow pigment production byPenicillium aculeatumATCC 10409

2015 ◽  
Vol 29 (14) ◽  
pp. 1300-1306 ◽  
Author(s):  
Majid Afshari ◽  
Fakhri Shahidi ◽  
Seyed Ali Mortazavi ◽  
Farideh Tabatabai ◽  
Zarin Es'haghi
Keyword(s):  
Agitation Speed ◽  
Yellow Pigment ◽  
Pigment Production ◽  
Influence Of Ph

Exploring the potential of Epicoccum nigrum for pigment production under variable conditions

2019 ◽  
Vol 48 (6) ◽  
pp. 555-562
Author(s):  
Sawinder Kaur ◽  
Vivek Mumbarkar ◽  
Paramjit S. Panesar ◽  
Sushma Gurumayum ◽  
Prasad Rasane
Keyword(s):  
Radial Growth ◽  
Growth Parameters ◽  
Nitrogen Sources ◽  
Yellow Pigment ◽  
Pigment Production ◽  
Stress Factors ◽  
Natural Food ◽  
Content Type ◽  
Epicoccum Nigrum ◽  
The Media

Purpose The purpose of this study is to isolate yellow pigment producing fungal strain and to determine the media requirement for growth and secondary metabolite production. Design/methodology/approach Fifteen soil samples were collected and studied for a pigment producing fungal sources. Selection of a fungus was based on pigment produced and further conditions, such as effect of media composition and light wavelength on pigment production and growth parameters were optimised. Findings Out of the isolates analysed, Epicoccum nigrum was selected for further study as this strain has the potential for pigment production. Among all the media evaluated, potato dextrose agar (PDA) was found to be the best media for growth and sporulation, whilst sabouraud dextrose agar (SDA) was only 29 per cent as capable as the best medium. The radial growth rate in case of PDA was 3 ± 0.02 mm/day, while in case of SDA, it was only 1.09 mm/day. Whilst starch as a carbon source was found to increase the radial growth to 5.15 ± 0.02 mm/day, sucrose significantly (p < 0.05) influenced the sporulation (224,000 ± 1,550 spores/ml) of Epicoccum nigrum. Amongst the various nitrogen sources analysed, peptone significantly increased (p < 0.05) the radial growth (6.55 ± 0.02 mm/day) as well as sporulation (220,000 ± 2,100 spores/ml). The observations also indicated that E. nigrum is able to sense and differentiate between light in different wavelength ranges and respond differently in growth and sporulation. The light passing through a red colour sheet resulted in better radial growth (8.5 ± 0.02 mm/day) in comparison to unfiltered light (3 ± 0.02 mm/day). Yellow pigment production in terms of hue values was significantly influenced by the presence of dextrose, peptone and darkness. Research limitations/implications The isolated strain could be studied for variable conditions and stress factors for optimal production of the pigment. Recovery and purification studies could be carried out at pilot and industrial scale. Practical implications The isolation of a strain producing valuable microbial pigment will increase the alternatives of natural food colours and enhance the its commercial applications Originality/value This study identifies Epicoccum nigrum as a potential source of microbial pigment and facilitates its growth and production for possible applications in industrial pigment production.

scholarly journals Statistical optimization of culture medium for yellow pigment production by Thermomyces sp.

2015 ◽  
Vol 7 (1) ◽  
pp. 203-210
Author(s):  
R. Poorniammal ◽  
S. Gunasekaran ◽  
R. Murugesan
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Yeast Extract ◽  
Culture Medium ◽  
Yellow Pigment ◽  
Pigment Production ◽  
Quadratic Model ◽  
High Yield ◽  
Dipotassium Hydrogen Phosphate ◽  
Yellow Pigments

In present study, Thermomyces sp. were able to produce high yield of yellow pigments screened. Pigment production by Thermomyces sp was optimized by employing factorial design and response surface techniques in submerged fermentation. The variables evaluated were the concentrations of, sucrose, yeast extract, ammonium sulphate, magnesium sulphate and dipotassium hydrogen phosphate having as response pigment production. One factor at-a-time method was employed for the optimization of media components. Response surface methodology (RSM) optimized these nutrient parameters for maximum yellow pigment production (1387 OD units), which resulted at 35.5 g/L sucrose 5.5 g/L yeast extract, 2.5 g/L NH4SO4, 0.3 g/L MgSO4 and 1.0 g/L K2HPO4 in the medium. Response surface methodology (RSM) was further used to determine the optimum values of process variables for maximum yellow pigment production. The fit of the quadratic model was found to be significant. A significant increase in yellow pigment production was achieved using RSM.

Maximizing yellow pigment production in fed-batch culture of Monascus sp.

2000 ◽  
Vol 90 (4) ◽  
pp. 363-367 ◽  
Author(s):  
Somchai Krairak ◽  
Kouji Yamamura ◽  
Ryoichi Irie ◽  
Mikio Nakajima ◽  
Hiroshi Shimizu ◽  
...  
Keyword(s):  
Batch Culture ◽  
Yellow Pigment ◽  
Pigment Production ◽  
Fed Batch ◽  
Fed Batch Culture

Enhancement of yellow pigment production by intraspecific protoplast fusion of Monascus spp. yellow mutant (ade−) and white mutant (prototroph)

2016 ◽  
Vol 217 ◽  
pp. 62-71 ◽  
Author(s):  
Worawan Klinsupa ◽  
Salak Phansiri ◽  
Panida Thongpradis ◽  
Busaba Yongsmith ◽  
Chetsada Pothiratana
Keyword(s):  
Protoplast Fusion ◽  
Yellow Pigment ◽  
Pigment Production ◽  
White Mutant

Melanocyte-stimulating hormone and the regulation of tyrosinase activity in hair follicular melanocytes of the mouse

1986 ◽  
Vol 111 (2) ◽  
pp. 225-232 ◽  
Author(s):  
S. A. Burchill ◽  
A. J. Thody
Keyword(s):  
Cyclic Amp ◽  
Cyclic Gmp ◽  
Hair Growth ◽  
Yellow Pigment ◽  
Tyrosinase Activity ◽  
Melanocyte Stimulating Hormone ◽  
Golden Yellow ◽  
Skin Explants ◽  
Low Levels ◽  
Old Mice

ABSTRACT Skin tyrosinase activity increases during hair growth in C3H–HeA*vy mice and reaches higher levels in young (30- to 35-day-old) mice when the hair follicular melanocytes synthesize the black pigment, eumelanin, than in older (6-month-old) mice when they produce the golden yellow pigment, phaeomelanin. To examine the regulation of the melanocytes at these different stages we have compared the effect of α-MSH and other agents that act, through cyclic AMP-dependent mechanisms, on skin tyrosinase activity in both young and old mice during hair growth, initiated by plucking. Daily administration of α-MSH, isoprenaline or theophylline increased coat darkness, and skin tyrosinase activity in the younger mice 7–9 days after plucking, but they were ineffective in the older mice. Similarly α-MSH, 8-bromo-cyclic AMP or theophylline increased tyrosinase activity in skin explants from the younger mice incubated for up to 24 h but had no effect in explants from older mice. Cyclic GMP had no effect on tyrosinase activity in skin explants from both young and old mice. It is suggested that whereas cyclic AMP-dependent mechanisms may operate to regulate tyrosinase activity in the hair follicular melanocytes of younger mice that produce eumelanin these systems may not operate in the older mice when these melanocytes synthesize phaeomelanin. Phaeomelanin synthesis, unlike that of eumelanin, may not depend upon tyrosinase and its regulation by cyclic AMP and this could explain the low levels of this enzyme in the skin and its failure to respond to α-MSH and other activators of the cyclic AMP system during periods of phaeomelanin production. J. Endocr. (1986) 111, 225–232

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