共查询到20条相似文献,搜索用时 15 毫秒
1.
Alison Gegios Rachel Amthor Busie Maziya-Dixon Chedozie Egesi Sally Mallowa Rhoda Nungo Simon Gichuki Ada Mbanaso Mark J. Manary 《Plant foods for human nutrition (Dordrecht, Netherlands)》2010,65(1):64-70
Cassava contains little zinc, iron, and β-carotene, yet it is the primary staple crop of over 250 million Africans. This study
used a 24-hour dietary recall to test the hypothesis that among healthy children aged 2–5 years in Nigeria and Kenya, cassava’s
contribution to the childrens’ daily diets is inversely related to intakes of zinc, iron, and vitamin A. Dietary and demographic
data and anthropometric measurements were collected from 449 Kenyan and 793 Nigerian children. Among Kenyan children 89% derived
at least 25% of their dietary energy from cassava, while among the Nigerian children 31% derived at least 25% of energy from
cassava. Spearman’s correlation coefficient between the fraction of dietary energy obtained from cassava and vitamin A intake
was r = −0.15, P < 0.0001, zinc intake was r = −0.11, P < 0.0001 and iron intake was r = −0.36, P < 0.0001. In Kenya, 59% of children consumed adequate vitamin A, 22% iron, and 31% zinc. In Nigeria, 17% of children had
adequate intake of vitamin A, 57% iron, and 41% zinc. Consumption of cassava is a risk factor for inadequate vitamin A, zinc
and/or iron intake. 相似文献
2.
A simple and rapid method for the determination of naturally occurring, potentially hazardous glycoalkaloids (GAs) in potatoes
and their products has been developed. The procedure is based on the on-line solid-phase extraction of the acetic acid extracts
from potato products and combined with liquid chromatography (LC)-mass spectrometry (MS) in a fully automated system (Symbiosis™,
Spark Holland Instruments, Emmen, The Netherlands). As sorbent material HySphere™ 18HD was used for alkaloid enrichment. GAs
were eluted with the LC gradient and directly analysed by MS. Detection of the analytes was achieved in the sensitive multiple
reaction monitoring mode using two characteristic ions (m/z 98 as a qualifier for GAs and m/z 868.3 as a quantifier for α-solanine or m/z 852.4 for α-chaconine). Typical validation data for method precision (v
k α-solanine = 5.3–6.5, v
k α-chaconine = 3.4–15.4), accuracy (average recovery of α-solanine = 84%, average recovery of α-chaconine = 87%) and linearity
over the range from 1 to 1,000 ng ml−1 (R
2 = 0.9915 for α-solanine, R
2 = 0.9939 for α-chaconine) with detection limits of 0.3 ng ml−1 for α-chaconine and 0.5 ng ml−1 for α-solanine were obtained. GA contents of commercial potato products were determined by the new on-line method and afterwards
compared with those obtained with an established high-performance LC routine procedure. Better performance of the on-line
procedure was obvious from the standard deviations of both methods. Other advantages included a strong reduction of overall
analysis time, human intervention and solvent consumption as well as waste production. The time required for the on-line analysis
was 5 min, which would allow processing of almost 100 samples in 8 h. 相似文献
3.
Total Phenolics Level,Antioxidant Activities and Cytotoxicity of Young Sprouts of Some Traditional Korean Salad Plants 总被引:2,自引:2,他引:0
Sang-Uk Chon Buk-Gu Heo Yong-Seo Park Dong-Kwan Kim Shela Gorinstein 《Plant foods for human nutrition (Dordrecht, Netherlands)》2009,64(1):25-31
The aim of this investigation was to study the antioxidant and anticancer activities of young sprouts of some traditional
Korean salad plants. Total phenolics, antioxidant and anticancer activities of the methanol extracts from young sprouts of
11 salad plants were determined. The highest amount of phenolics was found in methanol extracts of Euonymus alatus (235.7 mg kg−1), followed by Hypericum ascyron (197.1 mg kg−1), Zanthoxylum piperitum (194.1 mg kg−1) and Zanthoxylum schinifolium (142.5 mg kg−1). Methanol extracts of E. alatus, H. ascyron, and Z. piperitum at 63 mg kg−1 exhibited the highest dose-depend DPPH radical scavenging activity by 91.2, 91.2 and 83.9%, respectively. According to the
MTT results, the methanol extracts from Stellaria aquatica, Eleutherococcus sessilifolrus and Z. schinifolium showed the highest anticancer activities against Calu-6 (IC50 < 25.0 μgml−1) and from S. aquatica—the highest anticancer activities against SNU-601 (153.3 μgml−1), following by E. sessilifolrus (196.7 μg ml−1) and Amaranthus mangostanus (303.1 μgml−1). Total phenolics were highly correlated with the DPPH, suggesting that they contribute to the antioxidant properties of
the studied plants. In conclusion: young sprouts of Korean salad possess antioxidant and anticancer properties and could be
used as a supplement to proper drugs. 相似文献
4.
R. A. Bustomi Rosadi Afandi Masateru Senge Kengo Ito John T. Adomako 《Paddy and Water Environment》2005,3(4):219-223
The objective of this research was to investigate the critical water content (θ
c) and water stress coefficient (K
s) of soybean plant under deficit irrigation. This research was conducted in a plastic house at the University of Lampung,
Sumatra in Indonesia from June to September 2000. The water deficit levels were 0–20%, 20–40%, 40–60%, 60–80%, and 80–100%
of available water (AW) deficit, arranged in Randomized Completely Block (RCB) design with four replications. The results
showed that the soybean plant started to experience stress from week IV within 40–60% of AW deficit. The fraction of total
available water (TAW) that the crop can extract from the root zone without suffering water stress (p) was 0.5 and θc was 0.305 m3 m−3. The values of K
s at p=0.5 were 0.78, 0.86, 0.78, and 0.71 from week IV to week VII, respectively. The optimum yield of soybean plant with the highest
yield efficiency was reached at 40–60% of AW deficit with an average K
s value of 0.78; this level of deficit irrigation could conserve about 10% of the irrigation. The optimum yield of soybean
plant was 7.9 g/pot and crop water requirement was 372 mm. 相似文献
5.
Zusammenfassung In übertragungsversuchen mitMyzus persicae konnten die folgenden Isolate des M-Virus von Pflanzen der gegen das S-Virus immunen KartoffelsorteSaco aufSolanum demissum als Testpflanze übertragen werden: “leaf rolling mosaic”, “interveinal mosaic”, “Fortuna” und “D 1102”. Nicht übertragbar
unter den gew?hlten Bedingungen (48–72 Std. Saugzeit) war das “Paracrinkle”-Isolat. Es stimmt hierin mit dem S-Virus aus demUS-S?mling 41956 überein. Die Bedeutung der übertragungsverh?ltnisse für die Klassifizierung der Kartoffelviren M und S sowie des serologisch
verwandten, blattlausübertragbaren “carnation latent-Virus” wird diskutiert.
Summary In transmission experiments withMyzus persicae the following isolates of virus M were found to be transmittable toSolanum demissum test plants from potato plants of the varietySaco, which is immune to virus S: leaf rolling mosaic, interveinal mosaic, Fortuna and D 1102. The paracrinkle isolate was not transmittable under the conditions chosen (48–72 hours sucking time). In this respect it corresponds to the virus S from theU.S. Seedling 41956. The importance of transmission conditions for the classification of potato viruses M and S as well as of the serologically related and aphid-transmittable carnation latent virus is discussed.
Résumé Dans les essais de transmission parMyzus persicae, les isolés suivants du virus M, obtenus de la variété de pomme de terreSaco, immune au virus S, ont pu être transmis sur les plantes test deSolanum demissum: “leaf rolling mosaic”, “interveinal mosaic”, “Fortuna” et “D 1102”, L'isolé du “paracrinkle” n'était pas transmissible dans les conditions choisies (durée de pompage 48 à 72 heures). Sous ce rapport, il ressemble au virus S duUS-S?mling 41956. L'importance des conditions de transmission pour la classification des virus M et S de la pomme de terre ainsi que pour celle du “carnation latent-virus” sérologiquement apparenté et transmissible par le puceron est discutée.相似文献
6.
A. F. de Faria V. V. de Rosso A. Z. Mercadante 《Plant foods for human nutrition (Dordrecht, Netherlands)》2009,64(2):108-115
Carotenoids are pigments responsible for the yellow-reddish color of many foods and are related to important functions and
physiological actions, preventing several chronic-degenerative diseases. The objective of this study was to confirm the carotenoid
composition of jackfruit by high-performance liquid chromatography connected to photodiode array and mass spectrometry detectors
(HPLC-PDA-MS/MS). The main carotenoids were all-trans-lutein (24–44%), all-trans-β-carotene (24–30%), all-trans-neoxanthin (4–19%), 9-cis-neoxanthin (4–9%) and 9-cis-violaxanthin (4–10%). Either qualitative or quantitative differences, mainly related to the lutein proportion, were found
among three batches of jackfruit. Since the fruits from batch A showed significantly lower contents for almost all carotenoids,
it also had the lowest total carotenoid content (34.1 μg/100 g) and provitamin A value, whereas the total carotenoid ranged
from 129.0 to 150.3 μg/100 g in the other batches. The provitamin A values from batches B and C were 3.3 and 4.3 μg RAE/100 g,
respectively. The carotenoid composition of jackfruit was successfully determined, where 14 of the 18 identified carotenoids
were reported for first time. Differences among batches may be due to genetic and/or agricultural factors. 相似文献
7.
Rinelli S Spadafranca A Fiorillo G Cocucci M Bertoli S Battezzati A 《Plant foods for human nutrition (Dordrecht, Netherlands)》2012,67(1):100-104
We hypothesized that fruit ingestion provides measurable amounts of salicylic acid (SA) and produces different metabolic and
inflammatory responses compared to mere fruit sugars. In a randomized-crossover study, 26 healthy subjects received a peach
shake meal (PSM) (SA: 0,06 ± 0,001 mg/100 g) and a mixed sugar meal (MSM), consisting in an aqueous solution with the same
sugars found in the peach shake. In order to control for the SA contribution from meals in the previous day, 16 subjects (Group
1) abstained from fruits and vegetables consumption the evening before trials, and 10 subjects (Group 2) maintained their
usual diet. Circulating SA, glucose, insulin, free fatty acids, and interleukin-6 were determined. Basal SA was lower in Group
1 than in Group 2 (0.09 ± 0.02 vs. 0.30 ± 0.03 μmol/l, p < 0.001), peaked at 90 min in both groups (0.18 ± 0.01 vs. 0.38 ± 0.02 μmol/l, p < 0.01) and remained above baseline (p < 0.05) up to 3 h. Glycemia increased less after PSM at 15 min (p < 0.01) with a lower average glucose excursion (p < 0.05). Insulin peaked at 45 min with both meals but decreased less rapidly with PSM. Free fatty acids decreased more (p < 0.01), and interleukin-6 increased less (p < 0.05) with PSM. Dietary fruit intake increases the concentration of SA in vivo, and provides non-nutrients capable to modulate the inflammatory and metabolic responses to carbohydrates. 相似文献
8.
Summary Potato tubers were inoculated with two biotypes ofPhytophthora infestans then stored at 3,7, 10 and 15°C. Image analysis quantified average reflective intensity (ARI) of diseased tissue from cut
surfaces of sample tubers. Tuber tissue infection and infection rate were measured by calculating Mean ARI of samples. Average
tuber tissue infection and infection rate was minimal at 3°C (P.i.-US8 orP.i.-US1). Tuber tissue infection increased at temperatures >3°C, from 220 Mean ARI seven days after inoculation (dai) to 190–150
Mean ARI 50 dai (depending on cultivar and biotype ofP. infestans). Rate of tuber tissue infection caused byP.i.-US1 at 7°C was about zero in cv. Snowden but greater than −0.2 ARI day−1 (cvs Russet Burbank and Superior). Rate of late blight infection in tuber tissue generally increased with temperature from
−0.2 ARI day−1 (at 7°C) in all cultivars to a maximum of −0.8 ARI day−1 (10°C). 相似文献
9.
The structure development and dynamic properties of fibers produced by high-speed spinning of P(EN-ET) random copolymers were
investigated. The as-spun fibers were found to remain amorphous up to the spinning speed of 1500 m/min, and subsequent increases
in speed resulted in the crystalline domains containing primarilyα crystalline modification of PEN. Theβ modification was not found up to spinning speeds of 4500 m/min. On the other hand, annealing of constrained fibers spun at
the 2100 m/min at 180, 200, and 240°C exhibitedβ-form crystalline structure, while the annealed fibers spun in 600–1500 m/min range exhibited dominantlyα-form. Howeverβ-form crystals disappeared above the spinning speed of 3000 m/min. With increasing spinning speeds from 600 to 4500 m/min,
the storage modulus of as-spun fibers increased continuously and reached a value of about 10.4 Gpa at room temperature. The
tanδ curves showed theα-relaxation peak at about 155–165°C, which is considered to correspond to the glass transition. Theα-relaxation peaks became smaller and broader, and shift to higher temperatures as the spinning speed increases, meaning that
molecular mobility in the amorphous region is restricted by increased crystalline domain. 相似文献
10.
Thermotropic polyurethanes were synthesized from 1,6-hexane diisocyanate (HDI) as a diisocyanate, 1,6-hexane diol (HD), and
rigid diols containing imide unit such as N,N′-bis(4-hydroxyphenyl)-3,4,3′,4′-biphenyl-dicarboxyimide (BPDI) or bis-N-(4-hydroxyphenyl)-4,4′-oxydiphthalimide
(ODPI). The effects of structure difference between BPDI and ODPI and composition of HD/BPDI (ODPI) on the thermal and liquid
crystalline behavior were studied. Thermotropic polyurethanes with an inherent viscosity of 0.59–0.70 were obtained. The melting
temperature of BPDI-based polyurethanes were in the range of 150–290°C, however, those of ODPI-based polyurethanes were in
the range of 150–190°C. All the polyurethanes based on ODPI (25–100 mole %) clearly exhibited a stable liquid crystalline
phase, and BPDI-based polyurethane having 5–25% of BPDI showed a mesophase. The melting and isotropization temperatures (T
m
, T
i
) andΔT(T
i
−T
m
) increased with increasing BPDI and ODPI content. The polyurethanes based on BPDI has higher melting points and thermal stability
compared to ODPI-based polyurethanes. 相似文献
11.
Successive extractions of the dewaxed Caragana sinica with 70 % ethanol, 70 % ethanol containing 1 % NaOH, 1 M KOH, 1 M NaOH, 3 M KOH, and 3 M NaOH at 75 °C for 3 h released 80.4
% of the original lignin. The physico-chemical properties and structural features of these lignin fractions were comprehensively
characterized by alkaline nitrobenzene oxidation, GPC and two-dimensional NMR spectroscopy. The results showed that all the
lignin fractions had relatively lower molecular average-weights ranging between 910 and 1630 g/mol. Moreover, 2D-NMR showed
that the lignin fraction L2 isolated with 70 % ethanol containing 1 % NaOH from C. sinica was similar to a hardwood lignin, with a high S/G ratio accounted for 1.2, a predominance of β-O-4′ aryl ether linkages (77 % of all side-chains), followed by β-β′ resinol-type linkages (8 %) and lower amounts of β-5′ phenylcoumaran substructures (7 %), β-1′ spirodienone-type linkages (3 %), and cinnamyl end groups (5 %). The high predominance of the S-lignin units, together
with the high proportion of β-O-4′ aryl ether linkages could contribute to a relatively high reactivity of C. sinica lignin during alkaline pulping. 相似文献
12.
Wild Solanum species are characterized by several types of glycoalkaloids (GAs), which are usually not found in commercial potato cultivars.
These alkaloids serve as defence compounds against herbivores and microorganisms, especially fungi. In this study, the GA
composition of tuber and leaf material of 17 wild Solanum species was analysed qualitatively by liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS) and quantitatively
by high-performance liquid chromatography. The GAs identified were α-solanine, α-chaconine, β-chaconine, solasonine, solamargine,
demissine, dehydrodemissine, α-tomatine, dehydrotomatine, commersonine, dehydrocommersonine, leptine I and leptine II. Most
species accumulated the common potato GAs α-solanine and α-chaconine in tubers and solasonine and solamargine additionally
in leaves. In some species, such as S. acaule ssp. acaule, S. demissum and S. polyadenium, substantial amounts of unusual alkaloids were detected. By using LC-ESI-MS, we detected several minor alkaloids such as
dehydrogenated forms of α-tomatine, demissine and commersonine for the first time. Total GA content, expressed as the sum
of the four main alkaloids α-solanine, α-chaconine, solamargine and solasonine differed from species to species. In general,
GA contents in leaf tissue were higher and GA patterns were more complex than those of tubers. 相似文献
13.
The seed proteins of 110 commercially-released Indian wheat cultivars were fractionated using sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) to determine their high Mr glutenin subunit compositions. Amongst the cultivars, three alleles were indentified for the Glu-A1 locus (subunits 1, 2* and the null phenotype), eight alleles for the Glu-B1 locus (7, 7 + 8, 7 + 9, 6 + 8, 20, 13 + 16, 17 + 18 and a new allele) and two for the Glu-D1 locus (2 + 12 and 5 + 10). Nine of the cultivars were heterogeneous and possessed two or more 'biotypes' with respect to high Mr subunits. The cultivars were also analysed for the presence of the 1BL/1RS wheat-rye translocation by SDS-PAGE of unreduced prolamins and hybridisation of DNA dot blots with a rye-telomere-specific repetitive DNA probe, pAW-161. Both methods revealed that the majority of newly-released Indian wheat cultivars carry this translocation, thus confirming the agronomic superiority of these lines. While most of the normal wheat cultivars possessed high Mr subunits 2 + 12, 14 of the 18 translocation cultivars had the allelic subunits 5 + 10, even though no selection was made for these subunits during the breeding process. This suggests that the subunits 5 + 10 may play a compensating role for the loss of dough strength associated with the 1BL/1RS translocation. 相似文献
14.
In order to investigate the effects of cross-sectional shapes on the sound characteristics of polyester fibers, 10 specimens
were woven into a twill structure made of round, hollow, triangular, u-shape, cruciform, and composite cross-sectional (▴/▴,
()/▴,Y
y) fibers. Their rustling sounds were recorded, and their sound spectra were obtained from FFT analysis. Physical sound parameters
(LPT, ΔL, Δf) and Zwicker’s psychoacoustic parameters of the loudness(Z), sharpness(Z), roughness(Z), and fluctuation strength(Z) were
calculated from the sound spectra. According to noncircular cross-section fibers, the hollow shaped fiber had the highest
value of LPT, ΔL, loudness(Z), and fluctuation strength(Z). The triangular shaped fiber had a lower value of LPT, ΔL, loudness(Z),
and roughness(Z) than those of the round shaped fiber. Among composite cross-section fibers, C1 (▴/▴) and C3 (Y
y) had higher values of LPT, ΔL, Δf, and loudness(Z) but C2 (()/▴) had lower values. Also the LPT, ΔL, sharpness(Z), and roughness(Z) values of different denier
were similar to each other, but the Δf and loudness(Z) values increased as the denier increased. 相似文献
15.
The maximum strain experienced by the thinnest segment of a non-uniform fiber governs fiber breakage, yet this maximum strain
can not be obtained from a normal single fiber test. Only the average strain of the whole fiber specimen can be obtained from
a normal single fiber tensile test. This study has examined the relationship between the average strain, the maximum strain
and the degree of fiber non-uniformity, expressed in coefficient of variation (CV) of fiber diameters along fiber length.
The tensile strain of irregular fibers has been simulated using the finite element method (FEM). Using this method, average
and maximum tensile strains of non-uniform fibers were calculated. The results indicate that for irregular fibers such as
wool, there is an exponential relationship (i.e.ɛ
ave
ɛ
max=ae
−b CV
) between the ratio of average breaking strain and maximum breaking strain (ɛ
ave
ɛ
max) and the along-fiber diameter variation (CV). The strain ratio decreases with the increase of the along-fiber diameter variation. 相似文献
16.
Jimenez M Guzman AP Azuara E Garcia O Mendoza MR Beristain CI 《Plant foods for human nutrition (Dordrecht, Netherlands)》2012,67(1):57-63
Porophyllum tagetoides is an annual warm-weather herb that has an intense typical smell. Its leaves are commonly used in soup preparation and traditional
medicine for treatment of inflammatory diseases. Its volatile compounds and antioxidant properties were evaluated in crude,
aqueous and ethanol leaf extract and an oil emulsion using different antioxidant assays in vitro, such as: DPPH radical scavenging activity, redox potential, polyphenol content, reducing power and optical density. A high
antioxidative activity was found when comparing leaves with stems. The crude extract from leaves showed a very high reducing
power (2.88 ± 0.20 O.D.) and DPPH radical-scavenging activity (54.63 ± 4.80%), in concordance with a major concentration of
vitamin C (23.97 ± 0.36 mg/100 g). Instead, the highest polyphenol content (264.54 ± 2.17 mg GAE/g of sample) and redox potential
(561.23 ± 0.15 mV) were found by the ethanol and aqueous extract, respectively. Aldehydes and terpenes such as nonanal, decanal,
trans-pineno, β-myrcene and D-limonene were the major volatiles found. This study suggests that Porophyllum tagetoides extracts could be used as antioxidants. 相似文献
17.
Phytosterol,Squalene, Tocopherol Content and Fatty Acid Profile of Selected Seeds,Grains, and Legumes 总被引:1,自引:1,他引:0
Ryan E Galvin K O'Connor TP Maguire AR O'Brien NM 《Plant foods for human nutrition (Dordrecht, Netherlands)》2007,62(3):85-91
The unsaponifiable lipid fraction of plant-based foods is a potential source of bioactive components such as phytosterols,
squalene, and tocopherols. The objective of the present study was to determine the levels of phytosterols, and squalene, as
well as tocopherols (α and β + γ) in selected grains, seeds, and legumes. The method comprised acid hydrolysis and lipid extraction
followed by alkaline saponification, prior to analysis by HPLC. In addition, the fatty acid profile of the foods was determined
via total lipid extraction, fatty acid derivitisation and GC analysis. In general, β-sitosterol was the most prevalent phytosterol,
ranging in concentration from 24.9 mg/100 g in pumpkin seed to 191.4 mg/100 g in peas. Squalene identified in all foods examined
in this study, was particularly abundant in pumpkin seed (89.0 mg/100 g). The sum of α- and β+ γ-tocopherols ranged from 0.1 mg/100 g
in rye to 15.9 mg/100 g in pumpkin seeds. Total oil content ranged from 0.9% (w/w) in butter beans to 42.3% (w/w) in pumpkin seed and the type of fat, in all foods examined, was predominantly unsaturated. In conclusion, seeds, grains,
and legumes are a rich natural source of phytosterols. Additionally, they contain noticeable amounts of squalene and tocopherols,
and in general, their fatty acid profile is favorable. 相似文献
18.
Dielectric properties and ac electrical conductivity (σ
ac
) of Au/PVA(Co, Zn acetate)/n-Si and Au/PVA(Ni, Zn acetate)/n-Si Schottky diodes (SDs) have been investigated in dark and
under illumination by using experimental capacitance-voltage (C-V) and conductance-voltage (G/ω-V) measurements at 1 MHz and room temperature. Experimental results indicate that the change in dielectric constant (ɛ′), dielectric loss (ɛ″), loss tangent (tanδ), the real (M′) and imaginary (M″) parts of electric modulus and ac electrical conductivity (σ
ac
) with illumination were found to change linearly with illumination level (P). On the other hand, the ɛ′, ɛ″, tanδ and σ
ac
vs P have positive slope while the M′ and M″ vs P have negative slope. Such behavior of dielectric properties and σ
ac
can be attributed to illumination induced electron-hole pairs under illumination effect in the depletion region of SDs. The
obtained results under illumination suggest that these devices can be used as a sensor in optical applications. 相似文献
19.
Saminathan Ratnapandian Stanley MacArthur Fergusson Lijing Wang 《Fibers and Polymers》2012,13(2):206-211
Coloration of textiles, traditionally achieved using natural dyes, commonly employs synthetic dyes at the industrial level.
A revival of commercial interest in natural dyes has opened several research avenues. This paper investigates the application
by padding of cotton fabric with 10 g/l of two natural dyes derived from the Acacia plant family. Three mordanting techniques were studied; of which post-mordanting
produced the most even shade. Among the two mordants investigated, the use of copper sulfate resulted in a level beige shade
at 15 g/l concentration while ferrous sulfate performed best at 5 g/l yielding a yellow-grey shade. An optimum process-sequence for the copper sulfate mordant was “pad (dye)→dry→steam followed
by pad (mordant)→steam→dry”, and for ferrous sulfte it was “pad (dye)→steam→dry followed by pad (mordant)→steam→dry”. Typically
a change in mordant resulted in a different shade with the same dye. The study concluded that padding is a readily adaptable
process for the dyeing of cotton using natural dyes and acceptable fastness in shades can be obtained. 相似文献
20.
Summary Tubers of the potato cultivars Record, Wilja, Pentland Dell and Brodick (formerly clone 137371) were sampled before and after
storage at either 4°C or 10°C. Reducing sugar content stayed constant during storage at 10°C in all four cultivars but rose
greatly during the first 6–12 weeks of storage at 4°C in Record, Wilja and Pentland Dell but not in Brodick. Amylolytic activity
was determined after 5 weeks storage using blockedp-nitrophenyl maltoheptaoside as substrate for α-amylase,p-nitrophenyl maltopentaoside as substrate for β-amylase, andp-nitrophenylglucopyranoside as substrate for α-glucosidase. The values obtained from tubers stored at 4°C were higher than
those from tubers stored at 10°C, the differences being much less in Brodick than in the other three cultivars. 相似文献