Pigment characteristics

Ebook "Principles of food chemistry (Fourth edition)" was designed to serve as an introductory text for courses in food chemistry as part of food science programs meeting the Institute of Food Technologists standards. The original concept for the preparation of this book was to present basic information on the composition of foods and the chemical and physical characteristics they undergo during processing, storage, and handling.

614p tracanhphuonghoa1007 22-04-2024 11 2   Download

In the present study, four different pigmented rice varieties, namely glutinous white rice, black rice and two red rice varieties (TPS-1 and TKM-9) were evaluated for various quality aspects in terms of milling and physical characteristics such as hulling percentage, milling percentage, whole kernel recovery, milling loss, thousand grain weight, grain volume, bulk density, true density, grain length, grain width and L/B ratio.

6p viisac 23-09-2023 3 1   Download

Waardenburg syndrome is an autosomal dominant disorder with varying degrees of sensorineural hearing loss as well as abnormal pigmentation in hair, skin, and iris. There are four types of Waardenburg syndrome (1–4) with different characteristics.

11p vigamora 23-05-2023 5 3   Download

Two species of Whalleya from Guizhou and Hainan Provinces were collected during the investigation of Xylariales from 2019 to 2021. According to morphological and molecular characteristics, Whalleya hainanensis sp. nov. and W. microplaca are introduced. Whalleya hainanensis differs from W. microplaca by its obovoid or tubular perithecia and the slightly raised stromata; and differs from W. maculata by its smaller ascospores. Their detailed morphological descriptions and illustrations are provided. The taxonomic position of Whalleya is discussed.

10p lyhuyenthu 31-01-2023 6 3   Download

Enormous variability in skin colour and patterning is a characteristic of teleost fish, including Salmonidae fishes, which present themselves as a suitable model for studying mechanisms of pigment patterning. In order to screen for candidate genes potentially involved in the specific skin pigment pattern in marble trout (labyrinthine skin pattern) and brown trout (spotted skin pattern), we conducted comparative transcriptome analysis between differently pigmented dermis sections of the adult skin of the two species.

15p visilicon2711 20-08-2021 9 1   Download

In cultural characteristics six characters like colony colour, colony diameter, pigmentation, margin type, growth pattern and aerial hyphae were recorded. Maximum radial growth i.e. 90 mm was given by isolate Rb-07 of Sabalpur village followed by Rb-02 and Rb-12. Least radial growth of 45 mm was given by Rb-03 isolate of Nandpur village. Pigmentation was also observed in four isolates. Aerial hyphae were produced by six isolates.

7p chauchaungayxua10 18-03-2021 9 2   Download

In the present paper, the ceramic pigments FexZn1-xCr2O4 (x = 0  1) were synthesized with the starch-assisted sol-gel method. The resulting pigments were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and CIE L*a*b* color measurement. The results show that FexZn1-xCr2O4 pigments form at sintering temperature of 1100 OC for 60 minutes. The ACr2O4 spinel (A: Zn, Fe) and FeCrO3 perovskite phase with excellent crystallinity appears. The brown color intensity increases gradually with the increase of the number of substituted Fe2+ cations.

7p nguaconbaynhay9 03-12-2020 4 1   Download

In this work, solid zinc metavanadate pigments for application in paint primers were prepared by a simple route at various pH values and concentrations of monovanadate. According to the results, all samples showed a characteristic hexagonal structure with high anticorrosive abilities.

5p chauchaungayxua8 02-10-2020 20 0   Download

Phomopsis vexans affected stem and fruit of brinjal crop collected from the field and isolated on potato dextrose agar (PDA) produced white cottony growth, sub-aerial mycelial, circular shaped colony with indistinct zonation and good sporulation. Pigmentation is yellow to dark brown colour. Pycnidia formation takes place after 18 to 20 days which are dark brown in colour and scattered distribution on the media surface.

9p kethamoi7 26-08-2020 8 2   Download

Cultural, morphological and molecular characteristics of Fusarium oxysporum f. sp. ciceri, eight isolates indicated a great variability amongst them. However, the isolate FOC-2 (Jalna) exhibited maximum mycelial growth of 90.00 mm. The isolates viz., Jalna (FOC-2) and Beed (FOC-3) produced partially submerged (FOC-2) to submerged (FOC-3) white sparse dense growth with smooth margin and bright white substrate pigmentation. Maximum micro-conidial, macro-conidial and chlamydospore size (17.20 µm, 30.50 x 7.00 µm and 21.80 x 19.60 µm) was recorded in isolate Jalna (FOC-2).

14p angicungduoc6 20-07-2020 11 0   Download

Black banded disease of mango, caused by Peziotrichum corticolum (Massee) Subramanian, is becoming severe for the last three to four years in all the mango growing regions. Morphological and cultural characteristics of the pathogen were studied. The identity of the fungus was confirmed. The fungus showed maximum radial growth on host extract dextrose agar on 12th day after incubation at 27±1oC. Culture of P. corticolum exhibited diversity with respect to cultural characters like type of the growth, mycelial colour, pigmentation and colony margin.

11p trinhthamhodang6 09-07-2020 11 1   Download

Cultural, morphological and molecular characteristics of Fusarium oxysporum f. sp. udum were studied where eight isolates indicated a great variability amongst them. However, the isolate FOC-2 (Jalna) exhibited maximum mycelial growth of 90 mm. The isolates viz., Jalna (FOC-2) and Beed (FOC-3) produced partially submerged (FOC-2) to submerged (FOC-3) white sparse dense growth with smooth margin and bright white substrate pigmentation, respectively.

14p angicungduoc5 12-06-2020 15 1   Download

Cooking and eating quality of rice is predominantly influenced by various physio-chemical characteristics of starch. This study was aimed to characterize the physio-chemical properties of starch in commercially and traditionally cultivated rice varieties using Rapid Viscosity Analyser (RVA) in relation to identify the genotype with prominent starch composition to maximize the consumer’s acceptability.

14p nguathienthan5 04-06-2020 11 1   Download

Red coralline algae are critical components of tropical reef systems, and their success and development is, at least in part, dependent on photosynthesis. However, natural variability in the photosynthetic characteristics of red coralline algae is poorly understood.

10p viminato2711 22-05-2020 7 1   Download

Monascus mycelia and pigments are promising sources of food and medicine with their potential pharmaceutical values and health-improving functions. Using high cell density fermentation of Monascus spp. to achieve higher mycelium and yellow pigment production is worthy to be researched.

9p viuchiha2711 21-04-2020 9 1   Download

On the basis of cultural, morphological, molecular characteristics and pathogenicity test, the fungus was confirmed as F. oxysporum Schlechtend. Fr. f. sp. ciceri (Padwick) Matuo and K. Sato. The pathogenic nature of fifteen isolates tested on chickpea wilt susceptible cultivar JG-62, two isolate (Char, Choki) were found non-pathogenic gave zero per cent disease incidence (PDI), while one isolate (Chittal) found highly pathogenic with 100 per cent PDI which was further used for molecular identification and screening of agro-chemicals.

11p trinhthamhodang1212 06-04-2020 12 2   Download

Colour patterns are the most distinct phenotypic traits in the majority of the living organism including fishes and considered as one of the main influencing factors in consumers’ buying decisions. Color traits are regulated by mainly four types of pigments stored in chromatophores. Melanin, is one of the most important pigment of cells, responsible for the coloration. Tyrosinase is a characteristics enzyme in melanin biosynthesis. Modulation of tyrosinase is of significance in the ornamental fish industry, food fishes as well as in humans.

10p caygaocaolon4 04-04-2020 17 1   Download

In this study, the fifteen isolates of Trichoderma were obtained from rhizospheric soil samples of rice, soybean and mungbean from various locations of Pantnagar and Dehradun. These isolates were characterized based on their cultural and morphological characteristics. The cultural characteristics like colony colour, presence or absence of concentric rings, surface topography, pigmentation on the lower side of the plate, time of first appearance of green conidia and their growth at various temperatures were determined on the basal medium Potato Dextrose Agar.

8p caygaocaolon4 04-04-2020 10 1   Download

Microorganisms produce various pigments like carotenoids, melanin’s, flavins, monascins, violacein and indigo. Carotenoids are a group of bioactive compounds and are responsible for bright yellow, orange, red pigments of various plants, microorganisms and animals and are widely distributed in nature. These pigments have an important function to act as protective agents against oxidative damage. Recently carotenoids have attracted greater attention due to the beneficial role on human health.

20p trinhthamhodang4 22-03-2020 9 2   Download

Plants are constantly exposed to biotic stresses, which cause changes in plant metabolism including physiological damages, leading to crop productivity losses. This study was conducted to investigate bio-fertilizer applications (i.e., phosphorein, microbein, and combination of them at a ratio of 1:1 for seed before sowing) influences on two varieties (i.e., Giza 429 and Giza 40) of Vicia faba (L.) plant performances on borne diseasesinfected soil. Growth, yield and its quality, physio-biochemical attributes, nutrient contents and disease assessment were investigated.

19p caygaocaolon2 11-03-2020 17 1   Download