Sectional notes     

Louis Soffcke  Julian C. Miller  Frank W. Hussey  E. L. Newdick  T. M. Patterson  Robert Schmidt  D. M. James 《American Journal of Potato Research》1937,14(2):64-74

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Sectional notes     

W. B. Ward  H. A. Reiley  John C. Campbell  H. J. Evans  Louis W. King 《American Journal of Potato Research》1950,27(9):339-341

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The structure of boreal old-growth forests changes at multiple spatial scales over decades     

Kulha  Niko  Pasanen  Leena  Holmström  Lasse  De Grandpré  Louis  Gauthier  Sylvie  Kuuluvainen  Timo  Aakala  Tuomas 《Landscape Ecology》2020,35(4):843-858

Landscape Ecology - Changes in the structure of boreal old-growth forests are typically studied at a specific spatial scale. Consequently, little is known about forest development across different...  相似文献   

Assessing ecological changes in and around marine reserves using community perceptions and biological surveys     

M. Yasué  L. Kaufman  A. C. J. Vincent 《水产资源保护:海洋与淡水生态系统》2010,20(4):407-418

1. Well‐enforced partial or total no‐fishing zones (collectively known as marine protected areas, or MPAs) can help restore degraded coral reefs and enhance fish populations. 2. A comparison was made of community perceptions of ecological changes in an MPA with concurrent scientific data on these changes in the same MPA. Such analyses are particularly important in community‐based MPAs where local support is a key determinant of ecological success. 3. The no‐take MPA in question was initially launched in partnership with the community in 1995 and formalized in 1998. The perceptions data come from interviews with community members in 1999 and 2004, the biological data come from underwater visual censuses of the MPA from 1998 to 2004. 4. Community members perceived more fish within the MPA and slight increases in catch outside the MPA. In contrast, fish censuses showed a high degree of stochastic variation and only minor increases in fish abundance, size and diversity in and around the MPA between 1998 and 2004. 5. Possible explanations for these discrepancies include different temporal, spatial or species frames of reference and/or limitations to the biological survey technique. Other options include wishful thinking, external influences, a desire to please, or confounding with other benefits. 6. This study demonstrates some of the strengths and weaknesses of community perceptions and biological data. In order to improve our understanding about the changes that occur over time in an MPA and engender community support for the long‐term viability of MPAs, it is important to develop diverse and efficient monitoring schemes. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   

Pomegranate oil analysis with emphasis on MALDI-TOF/MS triacylglycerol fingerprinting   总被引：2，自引：0，他引：2  

Kaufman M  Wiesman Z 《Journal of agricultural and food chemistry》2007,55(25):10405-10413

Pomegranate oil (PGO) is a unique and quite rare edible oil produced from Punica granatum L. seeds. It is considered to be a powerful health-benefiting agent, due to its antioxidative, anticancer, and antilipidemic properties. The aim of this study was to achieve a comprehensive and detailed profile of the different components of PGO. The fatty acid profile and phytosterol composition were determined by GC-MS; the triacylglycerol (TAG) compositions were profiled by the mass spectrometry tool of MALDI-TOF/MS. Results showed linolenic acid (18:3) to be the predominant fatty acid in the PGO (64-83%), as previously reported. The linolenic acid fraction was composed of four different chromatographically separated peaks that are assumed, according to MS data (based on both FAME and DMOX derivatization), to be attributed to different geometric isomers of conjugated linolenic acid (CLNA), punicic acid (18:3: 9-cis,11-trans,13-cis) being the major isomer. The MALDI-TOF/MS finger printing results showed the different TAG compositions present in the PGO, the major ones being LnLnLn and LnLnP. This unique PGO TAG fingerprint enables it to be differentiated from most other common edible oils. Phytosterols were found in quite a high concentration in the PGO (4089-6205 mg/kg), about 3-4-fold higher than in soybean oil. A detailed profile of the phytosterols in the PGO showed a wide variety, the major phytosterols being beta-sitosterol, campesterol, and stigmasterol. This study depicts a new detailed analysis of PGO, showing great potential for further research regarding the physiological effects of specific valuable components in pomegranate oil.  相似文献   

What about the bond?     

Louis Kwantes 《The Canadian veterinary journal. La revue veterinaire canadienne》2022,63(5):469

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用RAPD标记检测与杨树生长和物候期有关的QTLs   总被引：3，自引：0，他引：3       下载免费PDF全文

李金花  苏晓华  张绮纹  Louis Zsuffa 《林业科学研究》1999,12(2):111-117

取美洲黑杨（母本）和青杨（父本）杂交获得的Ｆ２群体样本８０株,应用ＲＡＰＤ标记检测与Ｆ２群体３个数量性状（苗高、地径和封顶期）有关的ＱＴＬｓ。在Ｆ２九体中,一年生苗高、地径和封顶期性状表现显著分离,基本符合正态分布。单因子方差分析检测出与苗高、地径和封顶期性状相关的７个、６个和３个标记座位。并计算了各标记对相关性状变异的贡献率。与数量性状相关的标记有不同的亲本来源。ｔ检查结果各标记显带型和不显带型  相似文献   

The Potential Role of Sediment Mineralogy in Regulating Aluminum Concentrations in Lakewater     

Louis M. McDonald Jr  V. P. Evangelou  Paul M. Bertsch 《Water, air, and soil pollution》1998,104(1-2):41-55

An understanding of the controls on aluminum solubility is essential because Al can reach toxic levels in waters that are affected by acidic precipitation or acid mine drainage. One factor which has received little attention is the role of in-lake sinks for Al. We hypothesized that a chloritization mechanism was capable of removing large amounts of Al from solution when sediments contained 2:1 minerals without well-developed Al-hydroxy interlayers. The objective of this investigation was to evaluate the potential role of lake sediments in regulating Al equilibria in the overlying waters. Water chemistry data, sediment mineralogy and exchange phase composition, and Al sorption isotherms were used. Sediments with well developed Al-hydroxy interlayers sorbed less total Al, accumulated more Al on the readily reversible exchange phase, and had less pH buffering capacity than sediments without Al-hydroxy interlayers. We conclude that the mineralogy of lake sediments needs to be considered when evaluating Al equilibria in lakes.  相似文献   

Multiphasic Approach for the Identification of the Different Classification Levels Of Pseudomonas savastanoi Pv. Phaseolicola     

Abi S. dos A. Marques  Roselyne Corbière  Louis Gardan  Catherine Tourte  Charles Manceau  John D. Taylor  Régine Samson 《European journal of plant pathology / European Foundation for Plant Pathology》2000,106(8):715-734

The relationships between strains of Pseudomonas savastanoi pv. phaseolicola (P. sav. phaseolicola), P. syringae pv. tabaci (P. syr. tabaci) and P. syr. syringae which all cause disease on bean; the related species P. sav. glycinea and P. syr. actinidiae, and reference bacteria, were evaluated by studying the phenotypic and genetic diversity of a collection of 62 strains. All the P. sav. phaseolicola strains tested produced characteristic watersoaked lesions on bean pods. Other pathovars produced varying combinations of symptoms including necrotic lesions, with or without watersoaked centres and sunken tissue collapse of the lesion (P. syr. tabaci) and necrotic lesions with or without sunken collapse (P. syr. syringae). At the genomospecies level, all the strains of P. sav. phaseolicola, P. sav. glycinea and P. syr. tabaci, belonging to genomospecies 2, could be separated from P. syr. syringae strains (genomospecies 1) and P. syr. actinidiae strains (unknown genomospecies) by BOX-PCR and DNA/DNA hybridisation. To distinguish P. sav. phaseolicola, within genomospecies 2, from P. sav. glycinea and P. syr. tabaci, it was necessary to perform nutritional characterisations myo-inositol negative and p-hydroxy benzoate positive for P. sav. phaseolicola strains), PCR with specific primers designed from the tox region (positive for all of the P. sav. phaseolicola strains) and serotyping, as 71% of the P. sav. phaseolicola strains reacted as O-serogroup PHA1. Important intrapathovar variation was seen by genomic fingerprinting with REP and ERIC primers, as well as with RAPD primers (AE7 and AE10) and esterase profilings. While RAPD fingerprinting detected variability correlated with two race-associated evolutionary lines, REP, ERIC and esterase profiles revealed intrapathovar variation linked to some host origins, that separated the kudzu isolates, and the mungbean isolates, from the other P. sav. phaseolicola strains.  相似文献   

Epiphytic Occurrence of Pseudomonas syringae pv. papulans (Rose) in France, Where Blister Spot has Never Been Seen     

Mohamed Kerkoud  Charles Manceau  Louis Gardan  Regine Samson  Jean-Pierre Paulin 《European journal of plant pathology / European Foundation for Plant Pathology》2000,106(5):481-485

Pseudomonas syringae pv. papulans (PSP) the causal agent of blister spot, on the apple cultivar Mutsu in the USA, Canada and Italy, has not been described in France. A study on epiphytic populations of P. syringae isolated from French apple orchards revealed two isolates called KA54 and E121, whose biochemical characterisation showed high similarities with PSP strains. Identical symptoms were obtained with KA54, E121 and PSP strains, after vacuum inoculation of detached immature fruits of the cultivar Fuji, and young leaves of the cultivars Fuji, Mutsu, Gala and Golden Delicious. Koch's postulate was verified. These results indicate the presence of PSP in France. Differential characterisation criteria including serological, molecular and pathogenicity tests are proposed.  相似文献