共查询到20条相似文献，搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
W. L. Porter 《American Journal of Potato Research》1967,44(10):382-382
7.
Effects of timing and rate of N fertilizer application on concentrations of P, K, S, Ca, Mg, Na, Cl, Mn, Fe, Cu and Zn in herbage from perennial ryegrass/white clover pastures were studied at two sites in south-western Victoria, Australia. Nitrogen fertilizer (0, 15, 25, 30, 45 and 60 kg ha–1 ) was applied as urea in mid-April, early May, mid-May, early June and mid-June 1996 to pastures grazed by dairy cows. At Site 1, N fertilizer resulted in a linear increase in P, K, S, Mg and Cl concentrations in herbage and a linear decrease in Ca concentration. For all times of application, concentrations of P, K, Ca, Mg and Cl in herbage increased by 0·0048, 0·08, −0·010, 0·0013 and 0·053 g kg–1 dry matter (DM) per kg N applied respectively. For S concentration, maximum responses occurred in mid-May (0·012 g kg–1 DM per kg N applied). At Site 2, N fertilizer resulted in a linear increase in P, S and Na concentrations in herbage, a linear decrease in Ca concentration and a curvilinear increase in K and Cl concentration. The maximum responses for P, S and K concentrations in herbage occurred for the N application in mid-June and were 0·015, 0·008 and 0·47 g kg–1 DM per kg N applied respectively. For Cl concentration, the maximum response occurred for the N application in early June and was 0·225 g kg–1 DM per kg N applied. Overall, applications of N fertilizer up to 60 kg ha–1 did not alter herbage mineral concentration to levels that might affect pasture growth or animal health. 相似文献
8.
9.
10.
Krishna Kumari S Thayumanavan B 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,53(1):47-56
Scanning electron microscope (SEM) pictures of small millet starch granules showed more large polygonal and few small spherical or polygonal granules. The granules of small millets resembled those of rice starch granules. The size of the starch granules ranged from 0.8–10 m. The size of the granules was larger in barnyard millet and smaller in proso millet. Several granules showed deep indentation caused by protein bodies. SEM of starch isolated from 24 hour-germinated kodo millet showed pitting or pinholes at some points due to the attack of amylases (preferentially on bigger granules). Brabender viscoamylograph studies on small millet starches revealed that the gelatinization temperatures ranged from 75.8 to 84.9 ° C. Barnyard millet possessed lower amylograph viscosity, minimum breakdown, and relative breakdown values when compared to the other small millets. 相似文献
11.
氮磷钾肥对稻米铁、锌、铜、锰、镁、钙含量和产量的影响 总被引：21，自引：2，他引：21
采用田间试验，在四川省西昌市用两个水稻品种研究了氮、磷、钾肥施用量对稻米中铁、锌、铜、锰、镁、钙含量和产量的影响。结果表明，稻米中铁、锌、铜、锰、镁、钙含量均随着施氮量增加先上升后下降，滇屯502的铁、锌、铜、锰、镁、钙含量和产量都以施用90 kg/hm2 N最高，稻谷产量以施用180 kg/hm2 N最高；而合系39的铁、锌、铜、锰、镁、钙的含量以施用180 kg/hm2 N最高，稻谷产量以施用270 kg/hm2 N最高，说明供试籼型品种滇屯502对氮肥的敏感性较粳型品种合系39强；磷肥明显降低了稻米中铁、铜、锰、钙的含量和产量，适量增施磷肥有利于增加稻米中镁的含量和产量；适量施用钾肥有利于提高稻米中铁、锌、铜、锰含量和产量，两供试品种铁、锌、铜、锰含量均以90 kg/hm2 K2O时最高，而钾肥明显降低了稻米中镁、钙的含量和产量。 相似文献
12.
13.
以海南省全域耕地资源为研究对象,综合考虑耕地资源的经济产出价值、生态价值和社会服务价值,并利用模型进行量化测算,得出海南省耕地资源总价值为1 082 400.12元/hm2,其中,耕地资源经济价值为80 794.64元/hm2,占7.46%,耕地资源生态价值为302 477.37元/hm2,占27.95%,耕地资源社会价值为699 128.11元/hm2,占64.59%。建议海南省以耕地资源综合价值为基础继续适当提高征收耕地的补偿标准,建立耕地生态价值补偿机制,采取政府逐年补贴方式,将耕地的生态价值按照一定比例进行折算,逐年补贴给保护耕地的农民。同时明确接受补贴的耕地就要划为永久基本农田,不得转为其他用途使用,切实加强耕地保护。 相似文献
14.
Górnaś Paweł Czubinski Jaroslaw Rudzińska Magdalena Grygier Anna Ying Qian Chakradhari Suryakant Sahu Pravin Kumar Mišina Inga Urvaka Elise Patel Khageshwar Singh 《Plant foods for human nutrition (Dordrecht, Netherlands)》2019,74(1):91-98
Plant Foods for Human Nutrition - The seeds of nine species belonging to the Fabaceae family (Cassia alata, Cassia uniflora, Cassia obtusifolia, Cassia tora, Crotalaria albida, Crotalaria juncea,... 相似文献
15.
The milling potential of hulled barley, hulled oat, triticale, rye and wheat was studied using a long tempering process and a laboratory four-roller mill. Regardless of the investigated cereal, the results indicated a significant influence (p < 0.05) of volume per surface area ratio on the milling yield and ash contents of the flour. The lowest milling yield was obtained in case of hulled oat. Solvent retention capacity profiles were determined for all investigated whole cereals and flours for predicting the contribution of different polymers to the functionality of samples. For all solvents higher values were obtained for the whole cereals compared to the corresponding flour. Thermo-mechanical properties of the whole cereals and refined flours were also investigated. If in case of wheat the gluten proteins play an essential role on dough behaviour during kneading at 30 °C, in case of triticale, rye, hulled barley and hulled oat, the fibers play a major role as well. Thermo-mechanical properties of starch registered a large variation between cereals and/or flours. The lowest torque value corresponding to starch gelatinization (C3) was registered in case of the hulled oat flour, 1.92 Nm, while the highest value in case of rye flour, 2.65 Nm. 相似文献
17.
I. A. Abdou A. A. Abou-Zeid M. R. El-Sherbeeny Z. H. Abou-El-Gheat 《Plant foods for human nutrition (Dordrecht, Netherlands)》1972,22(1):29-35
The antimicrobial activities of the crude juices ofAllium sativum, Allium cepa, Raphanus sativus have been found to be strongly active onEscherichia coli, Pseudomonas pyocyaneus, Salmonella typhi andBacillus subtilis, while the crude juices ofCapsicum frutenscens andEruca sativa were active only onEscherichia coli, Salmonella typhi andBacillus subtilis. The crude juice ofAllium kurrat was active onEscherichia coli andBacillus subtilis. The active antibacterial substances were easily isolated by different organic solvents.
Zusammenfassung Die antimikrobiellen Aktivitäten der rohen Säfte vonAllium sativum undAllium cepa wurden als stark befunden gegenEscherichia coli, Pseudomonas pyocyaneus, Salmonella typhi undBacillus subtilis, während die rohen Säfte vonCapsicum frutescens undEruca sativa nur gegenEscherichia coli undBacillus subtilis aktiv waren. Der rohe Saft vonAllium kurrat erwies sich als aktiv gegenEscherichia coli undBacillus subtilis. Die aktiven antimikrobiellen Substanzen waren durch verschiedene organische Lösungsmittel leicht zu isolieren.
Résumé Les activités antimicrobiennes des jus crusd'Allium sativum, Allium cepa, Raphanus sativus ont été trouvées actives en affectantEscherichia coli, Pseudomonas pyocyaneus, Salmonella typhi etBacillus subtilis, mais les jus crus deCapsicum frutescens etEruca sativa affectent seulementEscherichia coli, Salmonella typhi etBacillus subtilis. Le jus crud'Allium kurrat affecteEscherichia coli etBacillus subtilis. L'active substance antibactérienne est isolée facilement par dissolvants organiques différents.相似文献
18.
Alexandra S. Silchenko Anatoly I. Kalinovsky Sergey A. Avilov Pelageya V. Andrijaschenko Roman S. Popov Pavel S. Dmitrenok Ekaterina A. Chingizova Vladimir I. Kalinin 《Marine drugs》2021,19(4)
Nine new mono-, di-, and trisulfated triterpene penta- and hexaosides, kurilosides A3 (1), D1 (2), G (3), H (4), I (5), I1 (6), J (7), K (8), and K1 (9) and two desulfated derivatives, DS-kuriloside L (10), having a trisaccharide branched chain, and DS-kuriloside M (11), having hexa-nor-lanostane aglycone with a 7(8)-double bond, have been isolated from the Far-Eastern deep-water sea cucumber Thyonidium (=Duasmodactyla) kurilensis (Levin) and their structures were elucidated based on 2D NMR spectroscopy and HR-ESI mass-spectrometry. Five earlier unknown carbohydrate chains and two aglycones (having a 16β,(20S)-dihydroxy-fragment and a 16β-acetoxy,(20S)-hydroxy fragment) were found in these glycosides. All the glycosides 1–9 have a sulfate group at C-6 Glc, attached to C-4 Xyl1, while the positions of the other sulfate groups vary in different groups of kurilosides. The analysis of the structural features of the aglycones and the carbohydrate chains of all the glycosides of T. kurilensis showed their biogenetic relationships. Cytotoxic activities of the compounds 1–9 against mouse neuroblastoma Neuro 2a, normal epithelial JB-6 cells, and erythrocytes were studied. The highest cytotoxicity in the series was demonstrated by trisulfated hexaoside kuriloside H (4), having acetoxy-groups at C(16) and C(20), the latter one obviously compensated the absence of a side chain, essential for the membranolytic action of the glycosides. Kuriloside I1 (6), differing from 4 in the lacking of a terminal glucose residue in the bottom semi-chain, was slightly less active. The compounds 1–3, 5, and 8 did not demonstrate cytotoxic activity due to the presence of hydroxyl groups in their aglycones. 相似文献
19.
Sea cucumbers produce numerous compounds with a wide range of chemical structural diversity. Among these, saponins are the most diverse and include sulfated, non-sulfated, acetylated and methylated congeners with different aglycone and sugar moieties. In this study, MALDI and ESI tandem mass spectrometry, in the positive ion mode, were used to elucidate the structure of new saponins extracted from the viscera of H. lessoni. Fragmentation of the aglycone provided structural information on the presence of the acetyl group. The presence of the O-acetyl group was confirmed by observing the mass transition of 60 u corresponding to the loss of a molecule of acetic acid. Ion fingerprints from the glycosidic cleavage provided information on the mass of the aglycone (core), and the sequence and type of monosaccharides that constitute the sugar moiety. The tandem mass spectra of the saponin precursor ions [M + Na]+ provided a wealth of detailed structural information on the glycosidic bond cleavages. As a result, and in conjunction with existing literature, we characterized the structure of five new acetylated saponins, Lessoniosides A–E, along with two non-acetylated saponins Lessoniosides F and G at m/z 1477.7, which are promising candidates for future drug development. The presented strategy allows a rapid, reliable and complete analysis of native saponins. 相似文献
20.
《水稻科学》2007,14(4):I0003-I0004
A AWAN, Inayat Ullah 118 B BAI You-lu 223 BALOCH, Mohammad Safdar 118 C CAI Qing-sheng 7 CAI Run 13 CAI Shan-xin 94 CAO Yong 42 CHANG Er-hua 33 CHEN Jie 21, 247 CHEN Li-yun 71 CHEN Ming 256 CHEN Ming-xue 217 CHEN Shan-na 189 CHEN Song 283 CHEN Yong-hui 315 CHENG Fang-min 135, 311 CHENG Gui-ping 94 CHENG Xia-nian 157 CRUZ, Casiana Vera 21 D DAI Qi-gen 204 DAI Yun-xia 315 DENG Qi-ming 85, 235 DING Yan 272 DONG Ming-hui 141 DONG Yan-jun 7 DU Hon… 相似文献