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At least 19 recordsLinked to original sources

PubMed2000

Dietary soya beans and kidney beans stimulate secretion of cholecystokinin and pancreatic digestive enzymes in 400-day-old Hooded-Lister rats but only soya beans induce growth of the pancreas.

The effects of age on cholecystokinin (CCK) release, pancreatic enzyme secretion, and growth of the pancreas mediated by dietary kidney beans or soya beans were evaluated in trials with 30-, 90-, 250-, and 400-day-old rats. Soya beans increased blood CCK and caused hypersecretion of digestive enzymes and rapid pancreatic growth in all rats. Kidney beans also elevated circulating CCK and stimulated enzyme secretion. However, with 90-, 250-, and 400-day-old rats, the secretory responses were attenuated. Furthermore, kidney beans did not induce pancreatic growth in 250- and 400-day-old rats.

Aging↗

PubMed1994

Distribution and localization of bean common mosaic virus and bean black root virus in stems of doubly infected bean plants.

Plants of bean (Phaseolus vulgaris) inoculated first on one primary leaf with strain NY15 of bean common mosaic virus, as inducer, and after three days, on the opposite leaf, with the strain NL3 of bean black root virus, as challenger, did not show systemic necrosis characteristic of the latter strain. This interference phenomenon was studied by determining the amount, distribution and localization of both strains in the part of stem between primary leaves and first trifoliolate leaf in both challenge-inoculated and singly inoculated (control) plants. In dot-blot immunoassay, NL3 was detected seven days after its inoculation as challenger, whereas in control plants its presence was established on day four. Immunostained thick sections revealed a large accumulation of NL3 antigen on day eight in both phloem and cambium, but not yet in the xylem and cortex, contrasted with the controls. In immunogold-silver stained semi-thin sections, most of the NL3 label was present in the companion cells and other phloem parenchyma cells, while in the control plants this virus was also present in xylem vessels and xylem parenchyma cells. Inducer strain NY15 was abundantly present in practically all the cells, including xylem vessels, from day two after challenge inoculation onwards. It is concluded that inducer strain NY15 hampers transport of NL3 to, and its spread in, the stem and prevents the latter strain from exerting its deleterious influence on the water conducting elements.

Fabaceae↗

PubMed1989

Changes in differently processed soya bean (Glycine max.) and lima bean (Phaseolus lunatus) with particular reference to their chemical composition and their mineral and some inherent anti-nutritional constituents.

The effects of 3 processing techniques: cooking, roasting and autoclaving on the proximate chemical composition, the mineral content and some inherent toxic factors of soya and lima beans were investigated. The processing techniques generally reduced the crude fibre levels and enhanced the extractable fat in the soya and lima beans. The coefficients of variability for crude fibre and ether extract due to the processing techniques of soya and lima beans were 20.9%, 16.0% and 22.3%, 38.1%, respectively. In parallel with decreased ash content in the cooked bean samples, there was a decrease in the K, Mg, Na and P levels relative to the raw bean and also relative to the other processing techniques. Mineral contents of the autoclaved bean samples were generally similar to those of the raw (unprocessed) samples. Under the processing conditions, roasting caused the highest reduction in thioglucoside content (59%) in soya bean while cooking caused the highest reduction in lima bean (78%). Trypsin inhibitor activity (TIA) ranged between 0.59 mg/g sample in the cooked soya bean and 11.6 mg/g sample in the raw bean while the corresponding values for lima bean ranged between 0.59 and 6.3 mg/g sample. Cooking and roasting caused over 90% reduction of TIA, while autoclaving caused 64-69% reduction in both bean samples. Under the assay conditions, haemagglutinating activity was not detected in the cooked and autoclaved soya and lima beans. The need to prevent both functional and nutritional damage to food proteins and other nutrients, resulting from excessive heating, was discussed.

Calcium↗

PubMed2002

Consumption of black beans and navy beans (Phaseolus vulgaris) reduced azoxymethane-induced colon cancer in rats.

Beans (Phaseolus vulgaris) are an important food staple in many traditional diets. There is limited evidence to suggest an inverse relationship between bean consumption and colon cancer. The objective of this study was to determine whether consumption of black beans and/or navy beans would reduce colon carcinogenesis in rats. Rats were fed a modified AIN-93G diet (control) or diets containing 75% black beans or 75% navy beans for 4 wk, and then colon cancer was initiated by administration of two injections of azoxymethane 1 wk apart. At 31 wk after the second injection, the incidence of colon adenocarcinomas was significantly lower (P < 0.05) in rats fed the black bean (9%) and navy bean (14%) diets than in rats fed the control diet (36%). Total tumor multiplicity was also significantly lower in rats fed the black bean (1.1) and navy bean (1.0) diets than in rats fed the control diet (2.2). The 44-75% reduction in colon carcinogenesis in rats fed beans was attributed to 1) more controlled appetites, leading to significantly less body fat, and 2) much greater concentrations of butyrate in the distal colon. It was concluded that eating black beans and navy beans significantly lowered colon cancer incidence and multiplicity.

Adenocarcinoma↗

PubMed2001

Iron and zinc bioavailability in rats fed intrinsically labeled bean and bean-rice infant weaning food products.

Beans are the core of the Latin American diet and contain iron and zinc. However, the bioavailability of these trace minerals from beans is low. The objective of this study was to determine if the bioavailability of iron and zinc could be improved with the use of fermentation and germination processing technologies. Black beans native to Costa Rica were grown hydroponically with either radioactive iron or zinc. The influence of fermentation and germination on iron and zinc bioavailability from intrinsically labeled infant weaning food products based on black beans and beans-rice was determined in rats. Mineral bioavailability was determined using whole-body (59)Fe retention for iron, and whole-body (65)Zn retention and incorporation of radiolabel into bone for zinc. Percent absorption of (59)Fe from fermented products ranged between 48.0 and 58.0. Percent absorption of (65)Zn ranged from 57.0 to 64.0. Fermentation did not increase iron bioavailability in rats fed fermented beans without rice. Fermentation of cooked beans significantly increased zinc retention. Germination significantly enhanced iron retention from cooked beans from 46 to 55% and from cooked beans-cooked rice from 34 to 48%. Germination significantly improved zinc absorption and retention from cooked beans without added rice.

Absorption↗

PubMed2005

Pretreatment of African yam bean (Sphenostylis stenocarpa): effect of soaking and blanching on the quality of African yam bean seed.

The effect of pretreatment (soaking in sodium salts and blanching) on hydration coefficient (HC), chemical composition, texture, and color of African yam bean (AYB) was investigated. Soaking in water and in salt solutions increased the HC and about 90% of final HC values were attained at 12 and 4 hr of soaking for whole and dehulled beans, respectively. Protein content was slightly increased by soaking and blanching while ash and fat contents were reduced. Generally, a combination of dehulling and wet-processing reduced firmness of the beans more than soaking or blanching of the whole beans. Antioxidant activity was lowest (3260 TE(3)100 g) in cream-colored beans and highest (16,600 TE/100 g) in brown-colored beans. The tannin contents of unprocessed cream-colored beans and dehulled wet-processed marble variety were not significantly different (p > 0.05). The levels of tannins in the marble variety were reduced by blanching for 40 min (19.2%), soaking for 12 hr (16.0%), dehulling (72.0%), dehulling and blanching (88.8%). The whiteness of bean flours was increased significantly by dehulling, slightly by wet-processing of marble variety, and reduced significantly by wet-processing of cream-colored beans.

Antioxidants↗

PubMed1998

Comparative study of enzymes related to proline metabolism in tepary bean (Phaseolus acutifolius) and common bean (Phaseolus vulgaris) under drought and irrigated conditions, and various urea concentrations.

There are several mechanisms used by plants for survival in adverse environments such as drought, high temperature and salinity. The objective of this study was to evaluate the drought tolerance of tepary bean as a function of biochemical processes linked to isozyme synthesis and changes in enzymatic activity related to proline metabolism. Mature seeds of common beans var. flor de mayo, Phoseolus vulgaris and tepary beans Phaseolus acutifolius were grown under two water conditions (irrigation and drought), and four levels of urea. Vertical electrophoresis and spectrophotometric techniques were used to evaluate protein patterns, glutamate dehydrogenase (GDH), proline oxidase (PO) and pyrroline-5-carboxylate reductase (P5C reductase) enzyme activities. These enzymes were studied because they are directly related to protein synthesis. Electrophoretic patterns showed more proteins in tepary beans than in common beans with limited irrigation. GDH showed only one isozyme, with a molecular weight between 240) to 270 kDa. A decrease in PO activity was observed in common beans under drought stress with a value of 237 micromol/min, in comparison to irrigation conditions of 580 micromol/min. GDH and P5C reductase enzymes have had higher activity in common beans than in tepary beans under water stress. There was a significant difference only in glutamate dehydrogenase enzyme with respect to urea level. The results suggest that drought tolerance of tepary beans is due to biochemical processes related to proline metabolic enzymes.

1-Pyrroline-5-Carboxylate Dehydrogenase↗

PubMed1987

The relationship between total serum IgE and castor-bean-specific IgE antibodies in castor-bean-sensitive patients from Marseilles.

The relationship between serum IgE and castor bean (Ricinus communis)-specific IgE was studied in a group of dockworkers and other residents of Marseilles who were diagnosed as having castor bean allergy. The diagnosis was made because they had asthma or other allergic symptoms together with a positive skin test to castor bean. Total serum IgE was found to be higher in castor-bean-allergic patients (mean = 174 IU/ml) than in a control group of local blood donors (mean = 66 IU/ml). IgE levels were not as high as those found in the sera of a previously identified group of castor-bean-allergic dockworkers from Port Sudan (mean = 902 IU/ml). Castor-bean-specific IgE was demonstrated in the serum of 91% of the allergic group and there was some correlation with total IgE (r = 0.53, p less than 0.01). The proportion of IgE antibody specific for castor bean was determined in 20 castor-bean-sensitive patients using the radioallergosorbent test and was found to vary between 9 and 64% (mean = 38% or 265 ng/ml). No castor-bean-specific IgE antibody was detected in the control group.

Ricinus communis↗

PubMed1991

Identification of potyvirus isolates from faba bean (Vicia faba L.), and the relationships between bean yellow mosaic virus and clover yellow vein virus.

Clover yellow vein virus (CYVV) isolate H and the related potyvirus isolates E178, E197, and E242 could be distinguished from bean yellow mosaic (BYMV) isolates by their wider host range among non-legume test plant species, the peculiar enlargement of the nucleolus in infected plants, and the larger size of their coat protein as evidenced by slower migration in SDS-PAGE. Serologically, they are qualitatively indistinguishable in electro-blot immunoassay (EBIA) also with antibodies specific to the N-terminal part of BYMV-B25 coat protein, implying therefore that CYVV and BYMV coat proteins contain identical amino acid sequences in the N-terminal region. The faba-bean virus isolates from Sudan, Syria, and The Netherlands could be identified as BYMV isolates especially adapted to faba bean. All of them were weakly pathogenic to Phaseolus bean with the exception of SV205, assuming an intermediate position between Phaseolus-bean isolates, with low pathogenicity to faba bean, and faba-bean isolates, usually having low pathogenicity to Phaseolus bean. Strains of BYMV are thus hard to delimit.

Antibodies, Viral↗

PubMed1997

Effect of selected Egyptian cooking methods on faba bean nutritive value and dietary protein utilization 2: ability of faba bean products to support hemoglobin response in rats.

To evaluate the dietary protein utilization and iron deficiency anemia as affected by the faba bean nutrient intake, a bioassay with rats was carried out with different experimental diets containing four faba bean products (stewed beans 'Medammis', deep fried dough 'Falafel', boiled germinated beans 'Nabet Soup' and poured paste 'Bissara') widely consumed in the Middle East. Amino acid composition of all faba bean products was determined and compared to raw beans. Severe heat-processing markedly decreased some essential amino acids, especially phenylalanine, cystine, methionine and tryptophan. Protein scores were 24.6, 19.5, 29.2, 28.2 and 35.6 for raw faba beans, 'Medammis', 'Falafel', 'Nabet Soup' and 'Bissara', respectively. 'Bissara' possessed the highest nutritional value, since it had the lowest GDR value [Grams consumed of product to cover the daily requirements for adult man in protein (63 g) and in energy (2900 kcal)] for the limiting amino acids (L A A). As indicated by P S/150 values [Satisfaction of the daily requirements of the adult man when 150 g (one can content) are consumed of product] for L A A, i.e. methionine+cystine (lowest P S/150 value), the above-mentioned faba bean products cover about 53, 77, 77 and 97% of the daily requirements of adult man in L A A, respectively. Fecal nitrogen excretion increased and true nitrogen digestibility decreased significantly (p < 0.01) with the inclusion of 'Medammis' in the diet. 'Nabet Soup' exhibited the highest true nitrogen digestibility. In contrast, the biological value of nitrogen was apparently unaffected. Highest blood hemoglobin level was found in rats fed diets containing 'Bissara', 'Falafel' and 'Nabet Soup', whereas the addition of 'Medammis' in the diet induced a significant (p < 0.05) reduction in blood hemoglobin level of fed rats.

Amino Acids↗

PubMed2001

Protein digestibility-corrected amino acid scores for bean and bean-rice infant weaning food products.

Vegetable proteins are an integral part of infant weaning diets in Latin America. Protein quality in plant-based products, however, is constrained by amino acid composition and intrinsically present antinutritional factors. The goal of this study was to improve bean protein quality by utilizing fermentation and germination processing. The objectives were to determine if protein quality, as measured by Food and Agricultural Organization (FAO) approved True Protein Digestibility (TPD) and Protein Digestibility-Corrected Amino Acid Scores (PDCAAS), of formulated bean-based weaning products could be improved upon fermentation and germination and if protein quality could be further improved when processed beans were combined with cooked rice. Results showed that the highest TPD and PDCAAS values were obtained for cooked germinated beans combined with rice. The TPD values for products ranged from 80 to 91%, and the PDCAAS values were 0.38-0.51. There was no significant increase (P < 0.05) of either TPD or PDCAAS values upon fermentation. Germination increased TPD of cooked bean products; this increase was not, however, accompanied by an increase in PDCAAS. When combined with rice, the PDCAAS values for all bean products improved significantly, thus supporting the concept of cereal-legume complementation. In conclusion, this study showed the range of PDCAAS in processed black bean and bean-rice infant weaning food products. The potential for incorporation of these products into the diets of weaning age Latin American children would, however, be confirmed only after validation with growth or metabolic balance studies in human infants.

Amino Acids↗

PubMed1996

Protective mechanism of the Mexican bean weevil against high levels of alpha-amylase inhibitor in the common bean.

Alpha-amylase inhibitor (alpha AI) protects seeds of the common bean (Phaseolus vulgaris) against predation by certain species of bruchids such as the cowpea weevil (Callosobruchus maculatus) and the azuki bean weevil (Callosobruchus chinensis), but not against predation by the bean weevil (Acanthoscelides obtectus) or the Mexican bean weevil (Zabrotes subfasciatus), insects that are common in the Americas. We characterized the interaction of alpha AI-1 present in seeds of the common bean, of a different isoform, alpha AI-2, present in seeds of wild common bean accessions, and of two homologs, alpha AI-Pa present in seeds of the tepary bean (Phaseolus acutifolius) and alpha AI-Pc in seeds of the scarlet runner bean (Phaseolus coccineus), with the midgut extracts of several bruchids. The extract of the Z. subfasciatus larvae rapidly digests and inactivates alpha AI-1 and alpha AI-Pc, but not alpha AI-2 or alpha AI-Pa. The digestion is caused by a serine protease. A single proteolytic cleavage in the beta subunit of alpha AI-1 occurs at the active site of the protein. When degradation is prevented, alpha AI-1 and alpha AI-Pc do not inhibit the alpha-amylase of Z. subfasciatus, although they are effective against the alpha-amylase of C. chinensis. Alpha AI-2 and alpha AI-Pa, on the other hand, do inhibit the alpha-amylase of Z. subfasciatus, suggesting that they are good candidates for genetic engineering to achieve resistance to Z. subfasciatus.

Amino Acid Sequence↗

PubMed2000

Complementation of the host range restriction of southern cowpea mosaic virus in bean by southern bean mosaic virus.

Vigna unguiculata (cowpea) and Phaseolus vulgaris (common bean) are permissive hosts for southern cowpea mosaic virus (SCPMV) and southern bean mosaic virus (SBMV), respectively. Neither of these two sobemoviruses systemically infects the permissive host of the other. Although bean cells are permissive for SCPMV RNA synthesis, they do not support the assembly of this virus. Thus, the host range restriction of SCPMV in bean may occur at the level of movement and may involve the inability of SCPMV to assemble in this host. In this study, it was demonstrated that SCPMV accumulates in an encapsidated form in the inoculated and systemic leaves of bean plants following coinoculation with SBMV. No evidence was observed that the SCPMV that accumulated in coinoculated bean plants had an altered host range relative to wild-type SCPMV. These results suggested that SBMV complemented the host range restriction of SCPMV in bean. Additional experiments demonstrated that cowpea protoplasts are permissive for SBMV RNA synthesis and assembly. It was concluded from these results that the host range restriction of SBMV in cowpea occurs at the level of movement. In mixed infections of cowpea with SCPMV and SBMV, the latter was recovered from the inoculated but not the systemic leaves. Its recovery from the inoculated leaves, however, was not dependent on the presence of SCPMV in the inoculum. From these results, it was concluded that SCPMV did not complement the host range restriction of SBMV in cowpea.

Comovirus↗

PubMed2005

In vitro starch digestibility and predicted glycemic index of corn tortilla, black beans, and tortilla-bean mixture: effect of cold storage.

People in the rural areas of Mexico consume corn tortillas and beans as basic components of their diet. However, little is known about the nutritionally relevant features of starch present in such combined meals. The objective of the present study was to evaluate the in vitro bioavailability of starch in tortilla-bean mixtures stored at 4 degrees C for different times, as compared to that of corn tortilla and boiled black beans kept separately under the same conditions. Available starch (AS), resistant starch (RS), and retrograded resistant starch (RRS) contents were measured. The in vitro starch hydrolysis indices (HI) of freshly cooked and cold-stored samples were evaluated using a chewing/dialysis digestion protocol. HIs were used to predict glycemic indices (pGI) of the samples. AS in tortilla and beans decreased between 3 and 6% after 48-72 h, whereas values in the mixture fell by 3% after 48 h, with no further change by 72 h. Only minor rises in RS contents (1.5-1.6%) were recorded for tortilla and beans after 72 h of storage, and a lower increase (0.4%) was recorded in the mixture. Judging from RRS values, an important proportion of RS is due to starch retrogradation. The HI and pGI were higher in tortilla than in bean and the mixture. Hydrolysis rate values decreased in the stored samples, a pattern that corresponded with RS and RRS changes. The slow digestion features of common beans are largely retained by the legume-tortilla combination. Data support the perceived health beneficial properties of starch in this traditional cereal-legume food.

Cold Temperature↗

PubMed2000

The chloroplast genomes of azuki bean and its close relatives: a deletion mutation found in weed azuki bean.

A physical map of the azuki bean (Vigna angularis cv. Erimo-shozu) chloroplast DNA (cpDNA) was constructed by localising the cleavage sites of PstI, SalI, SmaI, SacI, KpnI, PvuII and XhoI. The resulting map is more similar to the cpDNA-maps of two Vigna species (mung bean, V. radiata, and V. nakashimae) than to common bean (Phaseolus vulgaris) cpDNA map. Azuki bean was originally classified in the genus Phaseolus, and the inclusion of this taxon in the genus Vigna is a recent taxonomic decision. Our result is thus in favour of the taxonomic placement of azuki bean in the same genus as V. nakashimae and mung bean. We also found that a weed-form accession of azuki bean has a 96-bp deletion relative to the cultivar Erimo-shozu. The 96-bp deletion is located between the trnS-UGA and psbC genes in the large single-copy region of the chloroplast genome. This deletion is flanked by imperfect 9-bp direct repeats, suggesting that the deletion was a result of intra-molecular recombination mediated by these direct repeats.

Base Sequence↗

PubMed1995

Consumption of diets containing raw soya beans (Glycine max), kidney beans (Phaseolus vulgaris), cowpeas (Vigna unguiculata) or lupin seeds (Lupinus angustifolius) by rats for up to 700 days: effects on body composition and organ weights.

Feeding trials have been done with rats to assess the effects of long-term (700 d) consumption of diets based on raw cowpeas (Vigna unguiculata; moderate Bowman-Birk inhibitor content, low lectin content), lupin seeds (Lupinus angustifolius; low lectin and protease inhibitor content) or soya beans (Glycine max; high Kunitz inhibitor content, moderate Bowman-Birk inhibitor content, moderate lectin content) or diets containing low levels of raw kidney bean (Phaseolus vulgaris; high lectin content, low Bowman-Birk inhibitor content) on body weight and composition and organ weights. All the legume-based diets reduced feed conversion efficiency and growth rates during the initial 250 d. However, after 250 d the weight gains by rats given legume-based diets were similar to those of controls given the same daily feed intake. Long-term consumption of diets containing low levels of kidney bean significantly altered body composition of rats. The levels of lipid in the body were significantly reduced. As a result, carcasses of these rats contained a higher proportion of muscle/protein than did controls. Small-intestine relative weight was increased by short- and long-term consumption of the kidney-bean-based diet. However, the increase in relative pancreatic weight observed at 30 d did not persist long term. None of the other legume-based diets caused any significant changes in body composition. However, long-term exposure to a soya-bean- or cowpea-based diet induced an extensive increase in the relative and absolute weights of the pancreas and caused an increase in the incidence of macroscopic pancreatic nodules and possibly pancreatic neoplasia. Long-term consumption of the cowpea-, kidney-bean-, lupin-seed- or soya-bean-based diets by rats resulted in a significant increase in the relative weight of the caecum and colon.

Animal Feed↗

PubMed1992

[Comparative study of the chemical composition and nutritive value of runner bean (Phaseolus coccineus) and of common bean (Phaseolus vulgaris)].

Scarlet beans (Phaseolus coccineus) is an important food grain legume in the diet of rural populations living in the highlands of México, Guatemala and other countries of Latin America. The present study was conducted to obtain more chemical and nutritive data on this grain legume, because of its importance in agricultural production systems and due to the role it plays in rural diets. Ten samples were purchased in the highland markets of Guatemala, to compare their physical, chemical and nutritive characteristics with three samples of common beans (Phaseolus vulgaris). A sample of 10 kg was used for nutritional studies, fed alone and in mixtures with maize. The results indicated that P. coccineus has greater weight as compared to P. vulgaris (0.74 vs. 0.18 g) and are larger in size (0.60 vs. 0.14 cc/grain). Seed coat percentage was 10.2% for P. coccineus as compared to 9.0% for P. vulgaris. The cooking time was 231 minutes for P. coccineus and 180 minutes for common beans. Seed coat thickness and permeability are different when comparing P. coccineus with P. vulgaris, since at 24 hr soaking time, P. coccineus absorbed 80% of its water weight as compared to 100% for common beans. In chemical composition) small differences were found between P. coccineus and P. vulgaris. The first had slightly more ether extract, crude fiber and ash content than the second. Amino acid content among the six samples of P. coccineus was quite variable, but its pattern was rich in lysine and limiting in sulfur amino acids. Cooking time at 3 hr gave a higher NPR than when cooked at atmospheric pressure for 5 hr, with protein values relative to casein of 69.2 and 60.0%, respectively. P. coccineus protein quality was improved by methionine supplementation, and it appeared to be better digested than that of P. vulgaris. Mixtures of high protein quality were obtained with 15% P. coccineus and 85% maize while common beans and maize mixed in a 30 to 20 ratio showed maximum protein efficiency. The digestibility of the P. coccineus/maize mixtures was higher than that of common beans and maize.

Amino Acids↗

PubMed2005

[Polycyclic aromatic hydrocarbons in the beans, peas and broad beans from domestic market, 1999-2002].

Seeds of bean, peas and broad bean, purchased from local seed production plants in the provinces of Mazowieckie and Kujawsko-Pomorskie in the years 1999-2002, were determined for the contents of fifteen polycyclic aromatic hydrocarbons. The hydrocarbons were extracted from the seeds with a hexane-acetone mixture by means of sonification. The obtained extracts were then purified in a silica gel column. Polycyclic aromatic hydrocarbons (PAH) were identified and determined quantitatively with liquid chromatography using a fluorescent detector. The presence (in different concentrations) of PAH was reported in the majority of seeds of the bean, peas and broad bean varieties examined, which indicates that they may be ingested with food and bioaccumulated in the human organism. A considerably higher content of SPAH was observed in the seeds of broad bean, compared to those of bean and peas. The highest SPAH determined reached 2 x 10(2) microg/kg of product. The obtained results were comparable with those reported by other authors for vegetables originating from non-industrial areas. It is worth emphasising that all the seeds examined revealed the presence of PAH with carcinogenic properties.

Fabaceae↗