在人工接种和自然感虫情况下美洲黑杨后代对桑天牛抗性的研究   总被引：5，自引：0，他引：5  

胡建军  韩一凡  尹伟伦  Sylvie Augustin  Marc Villar 《林业科学》2002,38(1):164-167

杨树 (Ｐｏｐｕｌｕｓｓｐｐ .)是我国主要造林和工业用材树种之一 ,据统计我国杨树人工林面积达 666×1 0 4ｈｍ2 (王世绩 ,1 995 )。但杨树天牛危害十分猖獗 ,其中光肩星天牛 (Ａｎｏｐｌｏｐｈｏｒａｇｌａｂｒｉｐｅｎｎｉｓ)和黄斑星天牛 (Ａｎｏｐｌｏｐｈｏｒａｎｏｂｉ  相似文献   

Otter Lutra lutra L. mortality and marine oil pollution     

John R. Baker  Augustin M. Jones  Tessa P. Jones  Hugh C. Watson 《Biological conservation》1981,20(4):311-321

Following an oil spill at Sullom Voe Oil Terminal, Shetland, at least 13 otters died. Post-mortems on five corpses showed that they had died of haemorrhagic gastroenteropathy, associated with ingested oil. The primary cause of oil ingestion seems to have been grooming of the fur. A survey of the polluted coasts revealed that otters were still present throughout most of the area.  相似文献   

Relationships between biochemical attributes (non-structural carbohydrates and phenolics) and natural durability against fungi in dry teak wood (Tectona grandis L. f.)     

Florence Bobelé Niamké  Nadine Amusant  Jean-Paul Charpentier  Gilles Chaix  Yves Baissac  Nabila Boutahar  Augustin Amissa Adima  Séraphin Kati-Coulibaly  Christian Jay-Allemand 《Annals of Forest Science》2011,68(1):201-211

• Introduction   

Non-structural carbohydrates and phenolic compounds are implicated in the natural durability of wood. In order to find the chemical traits of natural durability in teak wood, the radial distribution of phenolics compounds and non-structural carbohydrates were studied in trees ranked by contrasting natural durability class against Antrodia sp.  相似文献   

Satisfaction across urban consumers of smallholder-produced teak (Tectona grandis L.f.) poles in South Benin     

Augustin K.N. Aoudji  Anselme Adégbidi  Jean C. Ganglo  Valentin Agbo  Armand S.I. Yêvidé  Charles De Cannière  Philippe Lebailly 《Forest Policy and Economics》2011,13(8):642-651

The study used the expectancy-disconfirmation framework to investigate the satisfaction among urban consumers of teak pole in South Benin, so as to identify the areas where interventions are needed to secure market opportunity for smallholder forestry. A survey was conducted in five cities; and 223 household-heads were interviewed using systematic sampling, with a random start. Data were collected on socio-demographic characteristics, teak pole consumption forms, behaviour patterns, and motivations. Respondents also rated their expectations and perceptions for a set of nine attributes on a 7 points Likert scale. Hierarchical ascending cluster analysis was performed to identify consumer segments; and satisfaction level was analysed per segment, by determining the gap between expectations and perceptions, for all attributes. Four consumer segments were identified; and sociodemographic profiles differed across those segments. Competitive price was an important purchasing motivation across the identified segments. Consumers were dissatisfied with price, availability, knot frequency, bending, length, hardness, and durability of teak pole. The efforts to meet the consumer expectations should be concentrated on building farmers' capacity in silvicultural management, and ensuring the availability of good planting material. The issue of competitive price might be addressed, through the improvement of the overall efficiency in the value chain.  相似文献   

The contribution of<Emphasis Type="Italic"> Phragmites australis</Emphasis> litter to methane (CH<Subscript>4</Subscript>) emission in planted and non-planted fen microcosms   总被引：1，自引：0，他引：1  

Sari?JuutinenEmail author  Tuula?Larmola  Rainer?Remus  Edith?Mirus  Wolfgang?Merbach  Jouko?Silvola  Jürgen?Augustin 《Biology and Fertility of Soils》2003,38(1):10-14

The contribution of Phragmites australis (Cav.) Trin. ex Steud. (common reed) litter as an origin of CH ₄-C was studied in a microcosm experiment. ¹⁴C-labelled, dried and ground P. australis root and shoot litter was buried in waterlogged, planted or non-planted fen microcosms. The evolution of ¹⁴CO ₂ and ¹⁴CH ₄ from the pots was monitored during the 35-day experiment. The ¹⁴C activity in the shoots and roots of the plants, soil, and inundation water was also analysed at the end of the experiment. Up to 40% of the released CH ₄-C originated from the added litter, whereas the rest originated from old soil organic matter. The comparison of planted and non-planted pots suggested that the contribution of recent plant-derived C (i.e. root exudates) to CH ₄ emission was negligible. The proportion of litter-derived CH ₄-C was significantly higher in the planted pots, suggesting that the presence of plants enhanced the formation of CH ₄ from litter. The major part of the initial ¹⁴C activity was recovered from the soil. About 3% was recovered from the inundation water, about 10% was emitted as CO ₂, and only <0.01% as CH ₄. However, these results demonstrated that plant litter and old soil organic matter are the major sources of CH ₄-C in fens during the early growth stage of P. australis.  相似文献   

Mutations in dynein link motor neuron degeneration to defects in retrograde transport     

Hafezparast M  Klocke R  Ruhrberg C  Marquardt A  Ahmad-Annuar A  Bowen S  Lalli G  Witherden AS  Hummerich H  Nicholson S  Morgan PJ  Oozageer R  Priestley JV  Averill S  King VR  Ball S  Peters J  Toda T  Yamamoto A  Hiraoka Y  Augustin M  Korthaus D  Wattler S  Wabnitz P  Dickneite C  Lampel S  Boehme F  Peraus G  Popp A  Rudelius M  Schlegel J  Fuchs H  Hrabe de Angelis M  Schiavo G  Shima DT  Russ AP  Stumm G  Martin JE  Fisher EM 《Science (New York, N.Y.)》2003,300(5620):808-812

Degenerative disorders of motor neurons include a range of progressive fatal diseases such as amyotrophic lateral sclerosis (ALS), spinal-bulbar muscular atrophy (SBMA), and spinal muscular atrophy (SMA). Although the causative genetic alterations are known for some cases, the molecular basis of many SMA and SBMA-like syndromes and most ALS cases is unknown. Here we show that missense point mutations in the cytoplasmic dynein heavy chain result in progressive motor neuron degeneration in heterozygous mice, and in homozygotes this is accompanied by the formation of Lewy-like inclusion bodies, thus resembling key features of human pathology. These mutations exclusively perturb neuron-specific functions of dynein.  相似文献   

Simultaneous determination of thiamine and riboflavin in foods by liquid chromatography     

J Augustin 《Journal of the Association of Official Analytical Chemists》1984,67(5):1012-1015

Recent methods for determination of thiamine (thiochrome) and riboflavin by liquid chromatography (LC) are outlined and discussed, and a new method allowing the simultaneous determination of these 2 vitamins by using a single fluorescence detector is described. This system involves an ODS 5 micron ultrasphere column and a pH 7.5 mobile phase composed of 0.005M tetrabutyl ammonium phosphate in methanol-water (20 + 80).  相似文献   

Chemical characterization of an aqueous extract and the essential oil of Tithonia diversifolia and their biocontrol activity against seed-borne pathogens of rice     

Dongmo  Albert Nanfack  Nguefack  Julienne  Dongmo  Joseph Blaise Lekagne  Fouelefack  François Romain  Azah  Rene Udom  Nkengfack  Ephrem Augustin  Stefani  Emilio 《植物病害和植物保护杂志》2021,128(3):703-713

Journal of Plant Diseases and Protection - The high cost of chemical pesticides and their negative impact on the environment prompted the search for natural pesticides from plants. The objective of...  相似文献   

Changes in the nutrient composition of potatoes during home preparation: I. Proximate composition     

R. B. Toma  J. Augustin  P. H. Orr  R. H. True  J. M. Hogan  R. L. Shaw 《American Journal of Potato Research》1978,55(11):639-645

The effects of various home cooking methods on the proximate composition of four potato varieties were investigated. The results revealed significant increases in the dry matter content of tubers during oven-baking and microwave cooking. With one exception, cooking unpeeled tubers in boiling water did not significantly alter their proximate composition. Boiling peeled tubers resulted in a significant decrease in the total ash content. Except for one variety, there was a significant decrease in crude fiber in boiled peeled and oven-baked potatoes. Changes in protein values were erratic.  相似文献   

Changes in the nutrient composition of potatoes during home preparation: II. Vitamins     

Augustin  Jorg  Johnson  S. R.  Teitzel  C.  True  R. H.  Hogan  J. M.  Toma  R. B.  Shaw  R. L.  Deutsch  R. M. 《American Journal of Potato Research》1978,55(12):653-662

American Journal of Potato Research - The retention of water-soluble vitamins by several potato varieties using various home preparation methods was investigated. Retention values in general...  相似文献