Anatomy and compositional variations within potatoes. IV. Total solids distribution in different cultivars     

R. M. Reeve  M. L. Weaver  Herman Timm 《American Journal of Potato Research》1971,48(8):269-277

Distribution of cortical, perimedullary, and pith tissues and total solids content were determined on both a fresh and a dry weight basis for six potato cultivars grown concurrently in three locations in California. At one location, tubers harvested 80 days from planting were 1.0 to 2.5% lower in total solids than tubers harvested at later dates. The high solids cortical tissues ranged from 39 to 51% of whole tubers on a dry basis, and the amount appeared to be related to tuber shape. White Rose and Red LaSoda showed greater difference in per cent total solids between cortical and perimedullary tissues than did Kennebec, Lenape,³ Norchip, and Russet Burbank. The high total solids of the cortical tissues is particularly significant to processing losses. Any method of peeling that removes one half the linear depth of the cortical tissues can result in a loss of 25% or more of total tuber solids, depending upon cultivar and tuber shape. Tuber development and distribution of total solids and other components were previously described for Red Pontiac, Russet Burbank, and White Rose tubers obtained from the retail market (6,9,10,11). It was particularly noted that the high-solids cortical tissues, although averaging only about 6mm in depth, comprised between 40 and 50% of both fresh and dry tuber weights (6,11). Because this sort of distribution of solids is especially significant to peeling loss, possible differences in solids among cultivars and at different harvest dates were investigated.  相似文献   

Suggested improvements for microscopic measurement of cells and starch granules in fresh potatoes     

R. M. Reeve 《American Journal of Potato Research》1967,44(2):41-50

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¹⁴C-多菌灵在棉苗植株内的吸收、传导、分布和代谢研究     

江树人  弗朗茨·米勒 《中国农业大学学报》1987,(1):103-112

本研究采用~(14)C 标记的多菌灵,通过棉苗的叶部和根部两个途径分别给药处理,结果说明:多菌灵象其它许多内吸杀菌剂一样,在植物体中随蒸腾流可以在木质部内迅速传导,而在韧皮部内传导是相当微弱的。多菌灵在棉苗各个部位的代谢速度是不相同的。通过根部给药处理后14天,根部、茎部及叶部母体化合物(MBC)的含量分别为25.3%,32.3%和56.7%。多菌灵在棉苗根部降解速度最快,茎部次之,叶部最慢。多菌灵在棉苗中的整个代谢速度较缓慢,14天后仍有48.5%的原药留在棉苗中。其主要代谢产物是2-氨基-苯并咪唑(2-AB)和水溶性轭合物。  相似文献   

Diagnostic features of type II fibrinoid leukodystrophy (Alexander disease) in a juvenile Beagle dog     

Hélène Vandenberghe  Kerstin Baiker  George Nye  Leticia Escauriaza  Emma Roberts  Nicolas Granger  Lizzie Reeve 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2023,37(2):670-675

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One cell: The thin slice of profit     

R. M. Reeve 《American Journal of Potato Research》1971,48(2):47-52

Calculations based on average parenchyma cell diameters of 160 to 240 μ in potatoes show that for chips expected losses range from 8 to 12% at 2 mm slice thickness, and from 16 to 24% at 1 mm thickness. Similar calculations for different size and thickness of dice used in dehydrated and frozen potato products show losses ranging from 4 to over 13% per piece. These calculated losses are due entirely to cut cells, the contents of which are washed out before processing. It is assumed that clean, sharp cuts are made without tearing of additional cells. These calculations do not take into account losses from peeling, trimming, leaching, irregular pieces, and other sources. Total losses from all potato processing may exceed 750 million pounds of potato solids per year. Relationships of these losses to the economy of potato processing and particularly to potato breeding, growing, and problems of waste reclamation and utilization are discussed.  相似文献   

SCIENCE AND INDUSTRY IN INDIA     

RUTHERFORD OF NELSON 《Science (New York, N.Y.)》1938,87(2248):75-79

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~(14)C-多菌灵和~(14)C-呋喃丹的单剂及混剂处理棉种后放射性物质在棉苗上的吸收与分布     

江树人  弗朗茨·米勒 《中国农业大学学报》1986,(1):93-100

一、前言多菌灵(Carbendazim,MBC),化学名称:0一二甲基-N-2-苯并咪唑氨基甲酸酯。它是一种高效、低毒、广谱的内吸杀菌剂。呋喃丹(Carbofuran,Furadan),化学名称:2,3-二氢-2,2一二甲基-F-苯并呋喃-N-甲基氨基甲酸酯。它是一种广谱杀虫、杀螨、杀线虫剂。具有触杀、内吸和胃毒作用。多菌灵和呋喃丹的合剂棉种包衣对于棉花苗期病虫害的防治效果显著。在我国,它被视为一种经济、有效的防治手段(Shen et al.  相似文献   

Lotononis angolensis forms nitrogen fixing, lupinoid nodules with phylogenetically unique, fast-growing, pink-pigmented bacteria, which do not nodulate L. bainesii or L. listii     

R.J. Yates  J.G. Howieson  W.G. Reeve  I.J. Law  J.K. Ardley  D. Real 《Soil biology & biochemistry》2007,39(7):1680-1688

Root-nodule bacteria that nodulate the legume genus Lotononis are being investigated to develop new forage species for agriculture. Bacteria isolated from nodules of Lotononis angolensis were fast-growing, highly mucoid and pink-pigmented, and on the basis of 16S rRNA phylogeny <94% related to other genera in the Alphaproteobacteria. Root-nodule bacteria isolated from other Lotononis species (L. bainesii, L. solitudinis and L. listii) resembled the more common dry, slow-growing, pink-pigmented rhizobia previously described for L. bainesii. These isolates could be attributed to the Methylobacterium genus, although not to the type species Methylobacterium nodulans. Further differences were uncovered with nodulation studies revealing that nodule isolates from L. angolensis were effective at nitrogen fixation on their host plant, but could nodulate neither L. bainesii nor L. listii. Reciprocal tests showed isolates from L. bainesii, L. listii and L. solitudinis were incapable of nodulating L. angolensis effectively. Nodule morphology for L. bainesii, L. angolensis and L. listii was characteristically lupinoid, with little structural divergence between the species, and with nodules eventually enclosing the entire root.  相似文献   

Relevance of immature tuber periderm to high commercial peeling losses     

R. M. Reeve 《American Journal of Potato Research》1974,51(8):254-262

Cell wall composition and histological distinctions between immature and mature periderm are reviewed. The structural characteristics of the periderm of immature tubers vitiate economic peeling. Continuous sloughing and replacement of periderm, occurring with rapid enlargement of Russet Burbank tubers, creates large unsuberized surface areas particularly susceptible to deep penetration of hot caustic and consequent pitting of tubers. The fully developed russetted net of mature periderm is well suberized and holds the caustic so it does not deeply penetrate. Improved crop management and harvest practices could eliminate excessive peel loss due to immature periderm.  相似文献   

Further histological comparisons of black spot,physiological internal necrosis,black heart,and hollow heart in potatoes     

R. M. Reeve 《American Journal of Potato Research》1968,45(10):391-401

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