Spawning time and place of the Japanese eel Anguilla japonica in the North Equatorial Current of the western North Pacific Ocean     

Satoshi Ishikawa  Kunihiro Suzuki  Tadashi Inagaki  Shun Watanabe  Yobuo Kimura  Akihiro Okamura  Tsuguo Otake  Noritaka Mochioka  Yuzuru Suzuki  Hiroshi Hasumoto  Machiko Oya  Michael J Miller  Tae Won Lee  Hans Fricke  Katsumi Tsukamoto 《Fisheries Science》2001,67(6):1097-1103

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Chemical determination of the streptothricin antibiotic nourseothricin     

W R?mer  G Hesse  N Miosga  H Fricke 《Archiv fuer experimentelle veterinaermedizin》1986,40(5):693-698

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Effects of species richness and functional groups on chemical constituents relevant for methane yields from anaerobic digestion: results from a grassland diversity experiment     

J. Khalsa  T. Fricke  A. Weigelt  M. Wachendorf 《Grass and Forage Science》2014,69(1):49-63

Changes in livestock production systems have led to land‐use changes and abandonment, especially of semi‐natural grassland in agriculturally less favoured regions. The generation of energy from biomass of extensive, high‐diversity grasslands can be an alternative to their abandonment, and anaerobic digestion is one possible method for converting grassland biomass into energy. However, little is known about the effects of species richness (SR) and functional groups on chemical constituents relevant for anaerobic digestion and the resulting energy potential. In this study, changes in the herbage chemical constituents that are relevant for forage quality were studied along a well‐defined diversity gradient (one to sixty species) and across different combinations of functional groups (legumes, small herbs, tall herbs and grasses). Substrate‐specific methane yield (CH_4 sub) was estimated through the concentrations of forage‐quality parameters such as crude fibre (CF), crude protein (CP), crude lipid, nitrogen‐free extract and their documented digestibility values, as well as the respective methane yields. Results show that with increasing SR, the CF increased and CP decreased, even though these effects could not be fully disentangled from the presence of grasses. These trends led to a negative effect of SR on CH_4 sub, while the area‐specific methane yield (CH_4 area = CH_4 sub × biomass yield) increased due to a strong increase in biomass with increasing SR. The CH_4 sub was increased when legumes were present, and it declined with the presence of grasses. Generally, CH_4 sub and CH_4 area varied between functional‐group monocultures and all functional‐group mixtures.  相似文献   

Cryptosporidium infection in a dugong (Dugong dugon)     

BD HILL  IR FRASER  HC PRIOR 《Australian veterinary journal》1997,75(9):670-671

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Disease of geese caused by a new herpesvirus   总被引：3，自引：0，他引：3  

PJ KETTERER  BJ RODWELL  HA WESTBURY†  PT HOOPER†  AR MACKENZIE‡  JG DINGLE§  HC PRIOR 《Australian veterinary journal》1990,67(12):446-448

A goose flock farmed outdoors in south-eastern Queensland suffered an outbreak of peracute disease with high death rate (97%). Small button ulcers and large plaques overlying lymphocyte aggregates were present on the mucosa of the small intestine of affected birds. Small white foci of necrosis and focal haemorrhages were seen in the livers. Numerous intranuclear inclusion bodies were observed microscopically in hepatocytes and a herpesvirus which grew rapidly in chicken kidney cells was isolated from tissues. Duck virus enteritis (DVE) was suspected but DVE antiserums failed to neutralise the virus. Further serological studies with a limited range of known avian herpesviruses have failed to identify the virus. Experimental transmission resulted in high mortality in geese (100%), lower mortality in ducklings and nil mortality in chickens. Surveillance studies showed no evidence of infection in domestic and wild birds beyond the original farm and the infection appears not to have been established in the area. Wild ducks, which were frequent visitors to the farm dam, were considered the most likely source of the infection.  相似文献   

Microsporidiosis in a peach-faced lovebird (Agapornis roseicollis)     

JH NORTON  HC PRIOR 《Australian veterinary journal》1994,71(1):23-24

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甘蓝型油菜(Brassica napus)无花瓣突变体“ Ap-Tengbe ”花瓣性状的遗传规律   总被引：2，自引：0，他引：2  

蒋立希  Becker HC 《浙江农业学报》1999,11(4):178-182

本项研究旨在探明甘蓝型油菜突变体Ａｐ－Ｔｅｎｇｂｅ无花瓣性状的遗传规律,‘Ａｐ－Ｔｅｎｇｂｅ’和德国栽培品种‘Ｆａｌｃｏｎ’之间通过正反交产生两个方向的Ｆ１,ＢＣ１－１（Ｆ１和‘Ａｐ－Ｔｅｎｇｅｂｅ’之间）,ＢＣ１－２（Ｆ１和‘Ｆａｌｃｏｎ’之间）以及Ｆ２各遗传群体,根据田间各遗传群体ＰＤｇｒ（花瓣度）的观察和统计,作者提出‘Ａｐ－Ｔｅｎｇｅ’突变体无花瓣性状的遗传由细胞质和两对核隐性基因共同控制  相似文献   

Biodegradation of Organic Matter During Mechanical Biological Treatment of MSW     

Dr. Wolfgang Müller  Dr. Klaus Fricke  Prof. Dr. Hardy Vogtmann 《Compost science & utilization》2013,21(3):42-52

The German Technical Guideline for Municipal Solid Waste (TASI) stipulates criteria for waste to be landfilled in order to minimize environmental hazards and landfill maintenance. One of these requirements is an ignition loss of less than five percent dm (dry matter). Only waste which has been incinerated can comply with this criterion, and subsequently be landfilled. Experts agree that the ignition loss alone is not suitable to predict reactions in a landfill. Therefore, other methods of assessing biological activity of processed MSW in a landfill are presented and discussed. It was found that respiration activity was most appropriate for such an assessment at this stage. From available data, it was concluded that processed MSW is fit for landfilling if the respiration activity is below 5 mg O₂/g dm over a period of 96 hours.  相似文献   

Hudson: A high yielding variety resistant to golden nematode     

R. L. Plaisted  H. D. Thurston  L. C. Peterson  D. H. Fricke  R. C. Cetas  M. B. Harrison  J. B. Sieczka  E. D. Jones 《American Journal of Potato Research》1973,50(6):212-215

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Utilization of semi-natural grassland through integrated generation of solid fuel and biogas from biomass. I. Effects of hydrothermal conditioning and mechanical dehydration on mass flows of organic and mineral plant compounds, and nutrient balances     

M. Wachendorf  F. Richter  T. Fricke  R. Graß  R. Neff† 《Grass and Forage Science》2009,64(2):132-143

The use of semi-natural grasslands for the production of renewable energy through conventional conversion techniques faces major limitations because of chemical and physical properties of the biomass. A new conversion procedure was developed which separates the biomass, as silage, into a liquid phase for biogas production and into a solid fraction to be used as fuel. Separation (mechanical dehydration) is carried out with a screw press after mashing with water (hydrothermal conditioning). The effect of hydrothermal conditioning at different temperatures (5, 60 and 80°C) and mechanical dehydration on mass flows of plant compounds into the press fluid was investigated for five grassland pastures typical of mountain areas of Germany. Results show that 0·18 of the crude fibre was transferred into the fluid, whereas more digestible organic compounds, such as crude protein and nitrogen-free extract, showed mass flows of 0·40 and 0·31 respectively. While 0·52–0·89 of potassium (K), magnesium (Mg) and chloride (Cl), which are detrimental for the combustion of the press cake, were transferred into the press fluid, more than 0·50 of calcium, which has positive combustion properties, remained in the press cake. Significantly ( P  <   0·05) higher mass flows were detected at conditioning temperatures of 60°C (K and Mg) and 80°C (crude fibre and nitrogen-free extract) compared with the 5°C treatment. Because of the separation of solids and liquids, high proportions of P (0·61–0·74) and K (0·64–0·85) but only 0·32–0·45 of nitrogen exported from the grassland would be recycled with an application of the digestates from the anaerobic digestion of the press liquid.  相似文献