scholarly journals Characterization of chestnut (Castanea sativa, mill) starch for industrial utilization

2001 ◽  
Vol 44 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Ivo Mottin Demiate ◽  
Marília Oetterer ◽  
Gilvan Wosiacki
Keyword(s):  
Chemical Composition ◽  
Corn Starch ◽  
Starch Content ◽  
Castanea Sativa ◽  
Starch Granules ◽  
Water Losses ◽  
Mechanical Stirring ◽  
Castanea Sativa Mill ◽  
High Level ◽  
Chestnut Starch

Studies were conducted to characterize the chestnut and its starch. Chemical composition of the chestnuts showed high level of starch. Moisture level in the raw nuts was around 50g/100g in wet basis and starch content, around 80g/100g in dry basis; other nut flour components were protein (5.58 g/100g), lipid (5.39 g/100g), crude fiber (2.34 g/100g) and ash (2.14 g/100g). Starch fraction was chemically characterized in order to identify the granule quality as compared with those of cassava and corn. This fraction showed more lipids and proteins than the other starches. Chestnut starch granules showed peculiar shape, smaller than the control starches and low amount of damaged units. Chemical composition concerning amylose : amylopectin ratio was intermediate to that presented by cassava and corn starch granules. Water absorption at different temperatures as well as solubility were also intermediate but closer to that presented by cassava granules. The same behavior was observed in the interaction with dimethyl-sulfoxide. Native starch granules and those submitted to enzymatic treatment with commercial alpha-amylase and also with enzymes from germinated wheat were observed by scanning electronic microscopy. Water suspensions of chestnut starch granules were heated to form pastes that were studied comparatively to those obtained with cassava and corn starches. Viscographic pattern of chestnut starch pastes showed a characteristic profile with high initial viscosity but peak absence, high resistance to mechanical stirring under hot conditions and high final viscosity. There was no way to compare it with the paste viscographic profiles obtained with the control starches. Chestnut starch pastes were stable down to pH 4 but unstable at pH 3. The water losses observed in the chestnut starch pastes after freeze-thaw cycles showed more similarity to the pattern observed in corn starch pastes as well as clarity and strength of the gel. In general the results showed that chestnut pastes functional properties are intermediate to those of the cassava and corn starch pastes.

Chemical composition and functional properties of native chestnut starch (Castanea sativa Mill)

2013 ◽  
Vol 94 (1) ◽  
pp. 594-602 ◽  
Author(s):  
Bruno R. Cruz ◽  
Ana S. Abraão ◽  
André M. Lemos ◽  
Fernando M. Nunes
Keyword(s):  
Chemical Composition ◽  
Functional Properties ◽  
Castanea Sativa ◽  
Castanea Sativa Mill ◽  
Chestnut Starch

scholarly journals Evaluation of Physical-Chemical Indexes, Sugars, Pigments and Phenolic Compounds of Fruits from Three Apple Varieties at the End of Storage Period

2014 ◽  
Vol 71 (1) ◽  
pp. 45
Author(s):  
Andruta Elena Muresan ◽  
Sevastita Muste ◽  
Andrei Borsa ◽  
Romina Alina Vlaic ◽  
Vlad Muresan
Keyword(s):  
Chemical Composition ◽  
Starch Content ◽  
Storage Period ◽  
Soluble Solids ◽  
Total Soluble Solids ◽  
Industrial Processing ◽  
Apple Varieties ◽  
The Individual ◽  
High Level ◽  
Detailed Chemical

Apples are the most cultivated and consumed fruits in the world. They not only taste great, but there are also rich sources of monosaccharides, pigments, fibers, functional compounds such as polyphenols which are well-known for their antioxidant action. Due to the high level of apples consumption, it is important to monitor and know the detailed chemical composition of this fruits on the market shelf. The aim of this paper was to study the detailed chemical composition of apples from three varieties. Samples from three varieties (Ionathan, Golden Delicious and Starkrimson) were taken from the Romanian market. Individual sugars composition was performed by HPLC, total polyphenols content by Folin Ciocalteu method, antioxidant capacity by using the DPPH test, while pigments were analysed by spectrophotometric specific methods and the total starch content measured by a polarimetric method. Water content, acidity, total soluble solids and pH were also monitored through specific methods. There were found differences between varieties particularly in relation to the polyphenols content, carotenoids and chlorophyll. Regarding the individual sugars composition, fructose and glucose were predominant followed by sucrose for all samples. Values of starch, moisture, acidity, total soluble solids and the pH were according to other apple varieties found in literature. These results provide important information regarding the chemical composition of apple varieties from Romanian market, for both human direct consumption and industrial processing. 

scholarly journals Soil Disturbance Induced by Silvicultural Treatment in Chestnut (Castanea sativa Mill.) Coppice and Post-Disturbance Recovery

Forests ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 1053
Author(s):  
Rachele Venanzi ◽  
Rodolfo Picchio ◽  
Stefano Grigolato ◽  
Raffaele Spinelli
Keyword(s):  
Sustainable Forest Management ◽  
Castanea Sativa ◽  
Soil Disturbance ◽  
Soil Features ◽  
Coppice Management ◽  
Castanea Sativa Mill ◽  
One Year ◽  
Time Required ◽  
High Level ◽  
The Hill

Chestnut forests represent an important environmental and landscape element in Europe, especially in the hill regions of southern Europe. In Italy, the total surface amount of chestnut forests is slightly expanded with 788,408 hectares, but orchards show a dramatic reduction (147,586 hectares or 20% of the total) and timber-producing stands a comparable expansion (605,888 hectares or 80%). The coppice management actually applied is considered one of the oldest forms of sustainable forest management. Over the years, coppice highlighted its versatility, resilience and multifunctionality. In this management system, in consideration of the “frequent” cutting cycles, special attention must be paid to forestry operations, because tree damage and soil compaction can trigger fungal disease and soil erosion. Frequent and repeated machine traffic increases the risk for soil degradation derived from compaction, topsoil removal and general disturbance. This study covered different forest areas and mechanization levels, in order to evaluate if the extent, type and severity of soil disturbance changed with site characteristics and logging technique. Furthermore, the study sought to obtain a better knowledge about the recovery time required for restoring the original soil properties after a disturbance has occurred. The findings showed that physical, chemical, and biological soil features were only partially disturbed by the coppicing and again that a high level of specialized mechanization does not generate heavier soil impact compared with the smaller and lighter machines deployed under the traditional and intermediate mechanization scenarios. Soil recovery in the impacted areas is already measurable one year after harvest and may be complete within the eight year—that is halfway through the standard rotation applied in the region to chestnut coppice.

scholarly journals The chemical composition of pollen, staminate catkins, and honey of Castanea sativa Mill.

10.5219/1627 ◽  
2021 ◽  
Vol 15 ◽  
pp. 433-444
Author(s):  
Vladimíra Horčinová Sedláčková ◽  
Olga Grygorieva ◽  
Katarína Fatrcová Šramková ◽  
Olga Shelepova ◽  
Inna Goncharovska ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Amino Acids ◽  
Chemical Composition ◽  
Geographical Origin ◽  
Castanea Sativa ◽  
Climatic Conditions ◽  
Biogenic Elements ◽  
Mineral Element ◽  
Castanea Sativa Mill ◽  
Nonessential Amino Acids

The chemical composition of pollen and honey primarily depends on the botanical and geographical origin of the species, as well as other factors – climatic conditions, soil type, plant species, etc. The present study was to knowledge the biochemical profile of pollen, staminate catkins, and honey samples of Castanea sativa Mill. which were examined under conditions of Ukraine. Proteins are the major components of pollen and staminate catkins (169.0 ±1.60 g.kg-1 and 69.8 ±1.67 g.kg-1, respectively), while saccharides are predominant in honey samples (38.0 ±1.32 g.kg-1 fructose, 32.5 ±0.68 glucose g.kg−1 and 6.1 ±0.06 g.kg-1 sucrose). Glutamic acid (13.30 g.kg-1), aspartic acid (13.05 g.kg-1), and proline (12.45 g.kg-1) were predominant nonessential amino acids in the chestnut pollen. The content of macro and microelements was found in the pollen and staminate catkins much higher than in the honey. All Castanea sativa samples are a very valuable source of potassium as the main mineral element contained in pollen (7400 mg.kg-1), staminate catkins (7760 mg.kg-1), and honey (981 mg.kg-1). Microelements such as manganese and iron prevailed in pollen (478 mg.kg-1 Mn and 461 mg.kg-1 Fe), and staminate catkins (247 mg.kg-1 Mn and 109 mg.kg-1 Fe), and heavy metals (Hg, Sr, Sn, Sb, Li) are present only in the pollen samples with the most abundant Sr (12.8 mg.kg-1) and Sn (1.9 mg.kg-1) content and can be used as indicator suggesting the environmental pollution status in the region. Regarding the vitamin content, vitamin C was the most represented in all samples. Obtained results indicate that chestnut is species with important constituents such as amino acids and vitamins, with low content of heavy metals and high content of biogenic elements that may be used in phytotherapy and phytopharmacology.

Effect of granular characteristics on the viscoelastic and mechanical properties of native chestnut starch (Castanea sativa Mill)

2015 ◽  
Vol 51 ◽  
pp. 305-317 ◽  
Author(s):  
André M. Lemos ◽  
Ana S. Abraão ◽  
Bruno R. Cruz ◽  
Maria Luísa Morgado ◽  
Magda Rebelo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Castanea Sativa ◽  
Castanea Sativa Mill ◽  
Chestnut Starch

High-Pressure Homogenization Alters Physicochemical Properties and In Vitro Digestibility of Chinese Yam (Dioscorea Opposita Thunb.) Starch

2018 ◽  
Vol 18 (1) ◽  
pp. 10-15
Author(s):  
Wang Yi-Wei ◽  
He Yong-Zhao ◽  
An Feng-Ping ◽  
Huang Qun ◽  
Zeng Feng ◽  
...  
Keyword(s):  
High Pressure ◽  
Physicochemical Properties ◽  
Starch Content ◽  
In Vitro Digestibility ◽  
High Pressure Homogenization ◽  
Starch Granules ◽  
Cross Polarization ◽  
Chinese Yam ◽  
Crystal Type

In this study, Chinese yam starch-water suspension (8%) were subjected to high-pressure homogenization (HPH) at 100 MPa for increasing cycle numbers, and its effect of on the physicochemical properties of the starch was investigated. Results of the polarizing microscope observations showed that the starch granules were disrupted (i.e. greater breakdown value) after HPH treatment, followed by a decrease in cross polarization. After three HPH cycles, the crystallinity of starch decreased, while the crystal type remained unaltered. Meanwhile, the contents of rapidly digestible starch and slowly digestible starch were increased. On the contrary, resistant starch content was decreased. Our results indicate that HPH treatment resulted in reduction of starch crystallinity and increase of starch digestibility.

scholarly journals Extraction Methods and Their Influence on Yield When Extracting Thermo-Vacuum-Modified Chestnut Wood

Forests ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 73
Author(s):  
Maurizio D’Auria ◽  
Marisabel Mecca ◽  
Maria Roberta Bruno ◽  
Luigi Todaro
Keyword(s):  
Catalyst Support ◽  
Castanea Sativa ◽  
Extraction Methods ◽  
Extraction Technique ◽  
Extraction Techniques ◽  
Surface Color ◽  
Ms Analysis ◽  
Castanea Sativa Mill ◽  
Molybdenum Catalysts ◽  
Chestnut Wood

Improvements in the yield and solubility of chestnut wood extractives, by using different extraction methods and molybdenum catalysts as support, have rarely been reported in literature. Many studies focus on the different parts of trees, except for the chemical characteristics of the remaining extractives achieved from thermally modified (THM) chestnut (Castanea sativa Mill) wood. This research seeks to better understand the effects of extraction techniques and catalysts on the yield and solubility of extractives. GC-MS analysis of the chloroform soluble and insoluble fractions was also used. Accelerated Solvent Extraction (ASE) 110 °C, Soxhlet, and autoclave extraction techniques were used to obtain extractives from untreated and thermally modified (THM) chestnut wood (170 °C for 3 h). Ethanol/H2O, ethanol/toluene, and water were the solvents used for each technique. A polyoxometalate compound (H3PMo12O40) and MoO3 supported on silica were used as catalysts. The THM induced a change in the wood’s surface color (ΔE = 21.5) and an increase in mass loss (5.9%), while the equilibrium moisture content (EMC) was reduced by 17.4% compared to the control wood. The yields of the extractives and their solubility were always higher in THM and mainly used ASE as the technique. GC-MS analysis of the extractives, without catalyst support, showed different results for each extraction technique and type of wood (untreated and THM). Ultimately, the amount of extractive compound dissolved in each solvent will differ, and the choice of extraction technique will depend on the intended final application of the extracted chemical product.

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