Search results

1 – 10 of 85
Article
Publication date: 23 March 2012

Priscila Giácomo Fassini, Ederlan de Souza Ferreira, Maraiza Aparecida da Silva, Valdir Augusto Neves and Aureluce Demonte

The purpose of this paper is to determine the effects of isolated soy glycinin (11S) on lipid metabolism in animals subjected to a hypercholesterolemic diet.

Abstract

Purpose

The purpose of this paper is to determine the effects of isolated soy glycinin (11S) on lipid metabolism in animals subjected to a hypercholesterolemic diet.

Design/methodology/approach

Male Wistar rats were kept in individual cages under appropriate conditions. The animals were divided into three groups (n=9): normal diet (STD) given a diet containing casein as protein source, recommended in AIN‐93M; hypercholesterolemic (HC) fed a normal diet with 1 per cent cholesterol and 0.5 per cent cholic acid; and hypercholesterolemic+glycinin (HC+11S), fed a hypercholesterolemic diet, plus 11S soy protein (300 mg/kg/day), dissolved in saline and administered by gavage. After 28 days, the animals were sacrificed and blood and liver removed for biochemical analysis of total cholesterol (TC), HDL‐cholesterol (HDL‐C) and triglycerides (TG) in the plasma, hepatic TC and TG.

Findings

A single daily dose of glycinin given to the hypercholesterolemic group demonstrated its functional role, particularly in raising HDL‐C and reducing triglycerides in the liver.

Originality/value

This study demonstrates the action of the 11S globulin in soybean as a serum lipid lowering agent, in addition to its nutritional properties, especially in raising the HDL‐C.

Details

Nutrition & Food Science, vol. 42 no. 2
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 2 September 2014

Ana L. Amaral, Ederlan S. Ferreira, Valdir A. Neves and Aureluce Demonte

This paper aims to determine the effects of 11S globulin isolated from Chickpea (Cicer arietinum L.) on lipid metabolism in animals subjected to a hypercholesterolemic and…

Abstract

Purpose

This paper aims to determine the effects of 11S globulin isolated from Chickpea (Cicer arietinum L.) on lipid metabolism in animals subjected to a hypercholesterolemic and hyperlipidemic diet and compared to the drug simvastatin.

Design/methodology/approach

Thirty-six male Wistar rats, kept in individual cages and under appropriate conditions, were separated into groups that were fed a normal diet (STD) containing casein as protein source and according to AIN-93G; a high-cholesterol diet (HC), normal diet plus 1 per cent cholesterol and 0.5 per cent cholic acid and 20 per cent coconut oil; HC diet plus the isolated 11S globulin (300 mg/kg/day); and HC diet plus the simvastatin (50 mg/kg/day), both dissolved in saline and administered by gavage for 28 days. After this time, the animals were killed.

Findings

The results indicated that the addition of 1 per cent cholesterol and 0.5 per cent cholic acid induced hypercholesterolemia in the animals without interfering with their weight gain. Analyses of total cholesterol (TC), HDL-cholesterol (HDL-C) and triglycerides (TG) in the plasma, and TC and TG in the liver were made. The results show that the protein isolated from chickpea, and given as a single daily dose, did not affect the levels of plasma TC and its fractions, although decreasing the TG levels. Unlike the simvastatin, the chickpea protein significantly reduced TC and TG in the liver relative to HC group.

Originality/value

A single daily dose of 11S globulin from chickpea contributed as only as additional 2.8 per cent of dietary protein intake. These findings demonstrate that 11S chickpea protein acts as a functional agent in the lipid metabolism in addition to its nutritional properties.

Details

Nutrition & Food Science, vol. 44 no. 5
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 3 July 2017

Chengsheng Gui, J. Zhu, Xq Liu and Zhongtao Zhang

The purpose of this paper is to prepare a water-resistant adhesive (SA) from soy flour (SF) with less water-soluble components.

Abstract

Purpose

The purpose of this paper is to prepare a water-resistant adhesive (SA) from soy flour (SF) with less water-soluble components.

Design/methodology/approach

Defatted SF was suspended and stirred in water. Then, the pH of dispersion was adjusted to a predetermined value (i.e. 8, 9 or 10) by the addition of 2M sodium hydroxide (NaOH) solution. After stirring at a predetermined temperature (25°C, 35°C, 45°C) for different time (1 h, 2 h, 3 h), the 2M hydrochloric acid (HCl) solution was added in a dropwise manner into the dispersion until the pH value was adjusted to 4.5. Then, the dispersion was centrifuged at 6,000 rpm for 2 min. The obtained precipitate with less water-soluble components was used as an adhesive (SA) directly.

Findings

SA had a wet strength of 1.02 MPa when used for the fabrication of poplar plywood. Polyvinyl alcohol (PVA) solution was applied to improve the tack of SAs to wood surface and the viscosities of SAs were decreased from 10,200 cP to 4,100 cP at room temperature after the PVA addition. The soy proteins in SAs were not denatured to a large extent according to the differential scanning calorimetry and light microscopy. The remained multilevel structures of soy protein played a positive contribution to the water resistance of SAs, and the bond lines of cured SAs were much more stable than those of the cured SF and soy protein concentrate (SPC).

Research limitations/implications

The fluidity and solid content of soy adhesives is much lower than formaldehyde adhesives. Further investigations are needed to improve the fluidity of soy adhesives with high solid contents.

Originality/value

Novel water-resistant soy adhesives were provided.

Details

Pigment & Resin Technology, vol. 46 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 6 September 2011

Ting‐Jin Lim, Azhar‐Mat Easa, Abdul‐Alias Karim, Rajeev Bhat and Min‐Tze Liong

The aim of this study is to develop a soy‐based cream cheese (SCC) with textural characteristics comparable to that of commercial dairy cream cheese (DCC) via the addition of…

1457

Abstract

Purpose

The aim of this study is to develop a soy‐based cream cheese (SCC) with textural characteristics comparable to that of commercial dairy cream cheese (DCC) via the addition of microbial transglutaminase (MTG), soy protein isolate (SPI) and maltodextrin (MD).

Design/methodology/approach

Response surface methodology (RSM) was employed in this study to determine the effects of MTG, MD and SPI on firmness of SCC.

Findings

The second‐order model generated via RSM was significant with only a 9.76 per cent variation not explained by the model. The coefficient of regression revealed that MTG, MD and SPI showed significant linear effects (P<0.0001) on the firmness of SCC, while MTG and SPI showed significant quadratic effects. The model successfully predicted and developed a SCC model with similar firmness as that of DCC; via the combination of 2.57 per cent (w/w) of MTG, 19.69 per cent (w/w) of SPI and 19.69 per cent (w/w) of MD. Physicochemical analyses revealed that SCC possessed lower fat content, reduced saturated fatty acid and zero trans fat. Further rheological measurements revealed that SCC was more solid‐like at room temperature, but less elastic at refrigerated temperature compared to DCC. SEM and SDS‐PAGE analyses affirmed that the textural changes of SCC were attributed to MTG‐induced cross‐linking.

Originality/value

The research demonstrated that a non‐dairy cream cheese could be developed using soy. In addition, the SCC also contained better nutritional properties compared to its dairy counterpart.

Article
Publication date: 4 September 2017

Leipeng Zhang, Binghan Zhang, Bo Fan, Zhenhua Gao and Junyou Shi

This paper aims to focus on the liquefaction of soybean protein to obtain a homogeneous protein solution with a high solid/protein content but low viscosity, which may improve the…

Abstract

Purpose

This paper aims to focus on the liquefaction of soybean protein to obtain a homogeneous protein solution with a high solid/protein content but low viscosity, which may improve the bond properties and technological applicability of soybean protein adhesive.

Design/methodology/approach

The liquefactions of soybean protein in the presence of various amounts of sodium sulphite, urea and sodium dodecyl sulphate (SDS) are investigated, and their effects on the main properties of liquefied soybean protein and soybean protein adhesives are characterized by Fourier transform infrared spectroscopy (FT-IR), gel permeation chromatography (GPC), viscosity tracing and plywood evaluation. Meanwhile, the applicability of soybean protein adhesive composed of liquefied protein for particleboard is also investigated.

Findings

Soybean protein can be effectively liquefied to form a homogeneous protein solution with a soybean protein content of 25 per cent and viscosity as low as 772 mPa.s; the addition of sodium sulphite, urea and SDS are beneficial for the liquefaction of soybean protein and have important effects on the technological applicability and water resistance of the obtained adhesive. The optimal liquefying technology of soybean protein is obtained in the presence of 1.5 Wt.% of sodium sulphite, 5 Wt.% of urea, 1.5 Wt.% of SDS and 3 Wt.% of sodium hydroxide. The optimal soybean protein adhesive has the desired water resistance in terms of the boiling-dry-boiling aged wet bond strength, which is up to 1.08 MPa higher than the required value (0.98 MPa) for structural use according to the commercial standard JIS K6806-2003. The optimal liquefied protein has the great potential to prepare particleboard.

Research limitations/implications

The protein content of liquefied soybean protein is expected to further increase from 25 to 40 Wt.% or even higher to further reduce the hot-pressing cycle or energy consumption of wood composites bonded by soybean protein adhesives.

Practical implications

The soybean protein adhesive composed of optimal liquefied protein has potential use in the manufacturing of structural-use plywood and has comparable applicability as a commercial urea-formaldehyde resin for the manufacturing of common particleboard.

Social implications

Soybean protein adhesive is an environmentally safe bio-adhesive that does not lead to the release of toxic formaldehyde, and the renewable and abundant soybean protein can be used with higher value added by the application as wood adhesive.

Originality/value

A novel liquefaction approach of soybean protein is proposed, and the soybean protein adhesive based on the liquefied protein is obtained with good technological applicability and desired bond properties that extend the applications of the soybean protein adhesive from interior plywood to particleboard and exterior or structural plywood.

Details

Pigment & Resin Technology, vol. 46 no. 5
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 December 1899

The information which has hitherto appeared in the daily press as to the evidence laid before the Departmental Committee which is inquiring into the use of preservatives and…

Abstract

The information which has hitherto appeared in the daily press as to the evidence laid before the Departmental Committee which is inquiring into the use of preservatives and colouring matters can hardly have afforded pleasant reading to the apologists for the drugging of foods. It is plainly the intention of the Committee to make a thorough investigation of the whole subject, and the main conclusions which, in the result, must bo forced upon unbiassed persons by an investigation of this character will be tolerably obvious to those who have given serious attention to the subject. At a later stage of the inquiry we shall publish a full account of the evidence submitted and of the Committee's proceedings. At present we may observe that the facts which have been brought forward fully confirm the statements made from time to time upon these matters in the BRITISH FOOD JOURNAL, and amply justify the attitude which we have adopted on the whole question. Representatives of various trade interests have given evidence which has served to show the extent to which the practices now being inquired into are followed. Strong medical evidence, as to the dangers which must attach to the promiscuous and unacknowledged drugging of the public by more or less ignorant persons, has been given; and some medical evidence of that apologetic order to which the public have of late become accustomed, and which we, at any rate, regard as particularly feeble, has also been put forward. Much more will no doubt be said, but those who have borne the heat and burden of the day in forcing these matters upon the attention of the Legislature and of the public can view with satisfaction the result already attained. Full and free investigation must produce its educational effect ; and whatever legal machinery may be devised to put some kind of check upon these most dangerous forms of adulteration, the demand of the public will be for undrugged food, and for a guarantee of sufficient authority to ensure that the demand is met.

Details

British Food Journal, vol. 1 no. 12
Type: Research Article
ISSN: 0007-070X

Article
Publication date: 13 November 2017

Ana Lucia Amaral, Ederlan Souza Ferreira, Maraiza Aparecida Silva, Valdir Augusto Neves and Aureluce Demonte

The hypocholesterolemic activity of legume vicilins and the structural homology among mung bean, soybean and adzuki bean vicilins (8S) suggest that this protein may play a role in…

Abstract

Purpose

The hypocholesterolemic activity of legume vicilins and the structural homology among mung bean, soybean and adzuki bean vicilins (8S) suggest that this protein may play a role in lipid metabolism. Thus, in the present study, the authors aim to isolate the mung bean vicilin and assess its in vitro effect on 3-hydroxy-3-methyl-glutaryl-CoA reductase (HMG CoAr), the enzyme responsible for endogenous cholesterol synthesis.

Design/methodology/approach

Chromatographic and electrophoretic characterization identified the molecular mass and polypeptide composition of mung bean vicilin. The hydrolysate of this globulin was obtained by sequential hydrolysis with pepsin-pancreatin and the fragments were characterized by molecular filtration, SDS PAGE and HPLC.

Findings

The molecular mass of vicilin was estimated as 158.23 at ± 10 kDa and SDS-PAGE revealed that the 8S globulin protein comprises four bands corresponding to polypeptides of 61, 48, 29 and 26 kDa. Fractions 10, 12, 14, 22 and 32 of the eluate from Sephadex G-25 exhibited significant inhibition of HMG CoAr.

Originality/value

The correspondence of the chromatographic profile of the peptide fractions with hypocholesterolemic activity suggests that the composition and chemical structure of these peptides are essential to their physiological effectiveness. The beneficial effects of mung bean vicilin identified in this study will support the characterization of this protein as a functional compound.

Details

Nutrition & Food Science, vol. 47 no. 6
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 1 June 2006

George A. Gkionakis, George Heliopoulos, Anthony K.D. Taylor and John Ahmad

The objective of this article is to investigate the binding of several lactones to soya protein isolate and soya protein under different conditions and, particularly, the extent…

Abstract

Purpose

The objective of this article is to investigate the binding of several lactones to soya protein isolate and soya protein under different conditions and, particularly, the extent of binding of the lactones γ‐9, γ‐10, δ‐10 and δ‐11, in different concentrations as well as the effect of various parameters on their binding ability.

Design/methodology/approach

Capillary column gas chromatography was used for the determination of lactones and the manual system was used for taking samples and for headspace analysis. Infrared spectroscopy was used for confirmation and investigation.

Findings

The percentage of binding of lactones γ‐9, γ‐10, δ‐10, δ‐11 on the soya protein is almost the same (about 33‐34 per cent). According to the Klotz equation, the bound ligand concentration was calculating as the number of moles of ligand bound per mole of protein. The results varied, but were similar. Specific experiments in water system with soya protein isolate (1 per cent) showed that the time taken for lactones γ‐10 and δ‐11 to reach equilibrium, the factors of temperature and pH affected the percentage of lactone bound.

Research limitations/implications

The amount of added lactone in products containing soya protein isolate should be investigated by using panel tests to confirm the improvement of flavour.

Practical implications

Flavour binding of lactones can be used to provide some foods with the required flavour impression by adding lactones to a bland soy protein base.

Originality/value

The flavour binding of lactones, which was investigated in the present paper, has not been adequately investigated in previous scientific research and the effects of the factors that influence their binding are very important.

Details

British Food Journal, vol. 108 no. 6
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 1 April 1989

Nigel Lambert

Peas and beans are traditional UK crops well suited to the British climate. Compared with cereals, legumes are capable of fixing nitrogen, and hence do not require nitrogen…

Abstract

Peas and beans are traditional UK crops well suited to the British climate. Compared with cereals, legumes are capable of fixing nitrogen, and hence do not require nitrogen fertiliser. Despite this advantage, the annual UK production of peas and beans is only about 1 million tonnes compared with roughly 13 million and 10 million tonnes of wheat and barley respectively. Thus these eco‐friendly ‘low‐input’ legumes can almost be regarded as ‘alternative crops’. The greater exploitation of peas and beans in Britain has long been debated amongst farmers, seed companies, food manufacturers and politicians alike, but much inertia still exists.

Details

Nutrition & Food Science, vol. 89 no. 4
Type: Research Article
ISSN: 0034-6659

Article
Publication date: 1 September 1936

We deeply regret to record the sudden death of Benjamin Henry Gerrans, F.I.C., at Clapham Park, on August 12th. For many years he had been chief assistant to the late Colonel…

Abstract

We deeply regret to record the sudden death of Benjamin Henry Gerrans, F.I.C., at Clapham Park, on August 12th. For many years he had been chief assistant to the late Colonel Charles E. Cassal, upon whose decease he became Public Analyst for Kensington, the Borough of Battersea, additional Public Analyst for the City of Westminster, Public Analyst for the Kesteven and Holland divisions of Lincolnshire, and for the Borough of Chepping Wycombe. At the time of his death he was Public Analyst for the Metropolitan Borough of Chelsea and Official Agricultural Analyst for the Kesteven and Holland Divisions of Lincolnshire. In 1895 he was appointed as a Gas Examiner to the London County Council, in 1910 to the Urban District Council of Sittingbourne, and in 1921 to the County Borough of West Ham. For thirty‐eight years he was a member of the Consulting Scientific Staff of the British Analytical Control. His death will be keenly felt by all those who were privileged to know him and to appraise his worth. He was elected an Associate of the Institute of Chemistry in 1888.

Details

British Food Journal, vol. 38 no. 9
Type: Research Article
ISSN: 0007-070X

1 – 10 of 85