Potato notes     

C. Tice  A. J. Johnston  E. P. Miller  E. A. Stokdyk  J. W. Weston  A. G. Tolass  J. Norton Woodruff  Ellwood Douglass  Wm. H. Martin  W. S. Blair  N. W. Glines  J. Tucker  Alfred H. Gilbert 《American Journal of Potato Research》1924,1(11):226-234

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Comparison of Channel Catfish,Ictalurus punctatus,and Blue Catfish,Ictalurus furcatus,Fed Diets Containing Various Levels of Protein in Production Ponds     

Menghe H. Li  Edwin H. Robinson  Craig S. Tucker  Daniel F. Oberle  Brian G Bosworth 《Journal of the World Aquaculture Society》2008,39(5):646-655

A comparative study was conducted on growth and protein requirements of channel catfish, Ictalurus punctatus, and blue catfish, Ictalurus furcatus. Four diets containing 24, 28, 32, or 36% protein were fed to both channel (initial weight 6.9 g/fish) and blue (6.6 g/fish) catfish for two growing seasons. There were significant interactions between dietary protein and fish species for weight gain and feed conversion ratio (FCR). No significant differences were observed in weight gain of channel catfish fed various protein diets, whereas higher protein diets (32 and 36%) resulted in better weight gain in blue catfish than lower protein diets (24 and 28%). No consistent differences were observed in the FCR of channel catfish fed various levels of dietary protein, whereas significantly higher FCRs were noted in blue catfish fed the 24 and 28% protein diets compared with fish fed 32 and 36% protein diets. Regardless of dietary protein levels, blue catfish had higher carcass, nugget, and total meat yield, and higher fillet moisture and protein, but lower fillet yield and fillet fat. Regardless of fish species, fish fed the 36% protein diet had higher carcass, fillet, and total meat yield than fish fed the 28 and 32% protein diets, which in turn had higher yields than fish fed the 24% protein diet. It appears that blue catfish can be successfully cultured by feeding a 32% protein diet.  相似文献   

Notes     

E. A. Stokdyk  John Tucker  C. H. Metzger  Albert E. Wilkinson  N. M. Hull  Harold L. Bailey 《American Journal of Potato Research》1930,7(4):107-112

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Pond‐raised Hybrid Catfish, ♀ Ictalurus punctatus × ♂ Ictalurus furcatus,Do Not Respond to Microbial Phytase Superdosing     

Menghe H. Li  David J. Wise  Charles C. Mischke  Suja Aarattuthodiyil  Ambika Tiwari  Penelope M. Lucas  Craig S. Tucker  Eugene L. Torrans  Thishya Perera 《Journal of the World Aquaculture Society》2019,50(1):78-86

Two experiments were conducted in consecutive years to evaluate the responses of hybrid catfish, ♀ Ictalurus punctatus × ♂ Ictalurus furcatus, to “superdosing” of 6‐phytase added to existing commercial catfish feeds. In each experiment, two diets with or without a phytase superdose (2500 and 5000 phytase units/kg, respectively) were compared. In Experiment 1, fingerlings (mean weight: 59 g/fish) were stocked in 17 0.4‐ha earthen ponds at 17,290 fish/ha and were fed once daily to apparent satiation for 198 d. In Experiment 2, fingerlings (mean weight: 47 g/fish) were stocked in 10 0.4‐ha ponds at 24,710 fish/ha and were fed for 128 d. In both experiments, there were no significant differences in total feed fed, gross yield, final fish weight, survival, or Blood packed cell volume between fish fed diets with or without phytase. The diets also had no significant effects on pond water column total phosphorus or chlorophyll a concentrations, but soluble reactive phosphorus concentrations were significantly higher in ponds receiving the phytase diet in Experiment 2. Phytase superdosing of nutritionally complete feeds does not appear to have additional benefits beyond the standard phytase dose on production characteristics or packed cell volume of pond‐raised hybrid catfish and had no beneficial effects on water quality.  相似文献   

Description and validation of a magnetic resonance imaging-guided stereotactic brain biopsy device in the dog     

Chen AV  Wininger FA  Frey S  Comeau RM  Bagley RS  Tucker RL  Schneider AR  Gay JM 《Veterinary radiology & ultrasound》2012,53(2):150-156

A stereotactic brain biopsy system that is magnetic resonance (MR) imaging-guided has not been validated in dogs. Our purpose was to determine the mean needle placement error in the caudate nucleus, thalamus, and midbrain of a canine cadaver brain using the modified Brainsight stereotactic system. Relocatable reference markers (fiducial markers) were attached to the cadaver head using a dental bite block. A T1-weighted gradient echo three-dimensional (3D) sequence was acquired using set parameters. Fiducial markers were used to register the head to the acquired MR images in reference to a 3D position sensor. This allowed the planning of trajectory path to brain targets in real time. Coordinates (X, Y, Z) were established for each target and 0.5 microl of diluted gadolinium was injected at each target using a 26-gauge needle to create a lesion. The center of the gadolinium deposition was identified on the postoperative MR images and coordinates (X', Y', Z') were established. The precision of this system in bringing the needle to target (needle placement error) was calculated. Seventeen sites were targeted in the brain. The mean needle placement error for all target sites was 1.79 +/- 0.87 mm. The upper bound of error for this stereotactic system was 3.31 mm. There was no statistically significant relationship between needle placement error and target depth (P = 0.23). The ease of use and precision of this stereotactic system support its development for clinical use in dogs with brain lesions > 3.31 mm.  相似文献   

Effects of modified-live bovine viral diarrhea virus vaccines containing either type 1 or types 1 and 2 BVDV on heifers and their offspring after challenge with noncytopathic type 2 BVDV during gestation     

Ficken MD  Ellsworth MA  Tucker CM  Cortese VS 《Journal of the American Veterinary Medical Association》2006,228(10):1559-1564

OBJECTIVE: To compare the efficacy of modified-live virus (MLV) vaccines containing either type 1 bovine viral diarrhea virus (BVDV) or types 1 and 2 BVDV in protecting heifers and their offspring against infection associated with heterologous noncytopathic type 2 BVDV challenge during gestation. DESIGN: Randomized controlled study. ANIMALS: 160 heifers and their offspring. PROCEDURES: After inoculation with a placebo vaccine, 1 or 2 doses of an MLV vaccine containing type 1 BVDV, or 1 dose of an MLV vaccine containing both types 1 and 2 BVDV, heifers were bred naturally and challenge exposed with a type 2 BVDV field isolate between 62 and 104 days of gestation. Pregnancies were monitored; after parturition, virus isolation and immunohistochemical analyses of ear-notch specimens were used to determine whether calves were persistently infected. Blood samples were collected at intervals from heifers for serologic evaluation and virus isolation. RESULTS: Persistent infection was detected in 18 of 19 calves from heifers in the control group and in 6 of 18 calves and 7 of 19 calves from heifers that received 1 or 2 doses of the type 1 BVDV vaccine, respectively. None of the 18 calves from heifers that received the type 1-type 2 BVDV vaccine were persistently infected. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggest that the incidence of persistent BVDV infection among offspring from dams inoculated with 1 dose of the MLV vaccine containing types 1 and 2 BVDV was decreased, compared with 1 or 2 doses of the MLV vaccine containing only type 1 BVDV.  相似文献   

Retroviraemia and low health status in pigs     

Tucker AW  Scobie L 《The Veterinary record》2006,159(11):367-368

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Isolation of high-quality RNA from apple (Malus domestica) fruit     

Asif M  Trivedi P  Solomos T  Tucker M 《Journal of agricultural and food chemistry》2006,54(15):5227-5229

It is difficult to isolate sufficient quantities of high-quality RNA from apple fruit. An abundance of polyphenolic compounds and polysaccharides and a relatively low concentration of RNA in the fruit tissue create conditions that hamper RNA isolation when standard techniques are used. We have developed two RNA isolation methods that include an initial homogenization and extraction with acetone or ethanol. These in turn remove the interfering compounds and precipitate the protein and nucleic acids for subsequent RNA extraction. The quality of RNA was satisfactory with both acetone and ethanol preparations; however, the acetone powder produced consistently higher quantities of RNA.  相似文献   

Nutritional quality of processed milk containing carrageenan   总被引：1，自引：0，他引：1  

R M Tomarelli  W D Tucker  L M Bauman  S Savini  J R Weaber 《Journal of agricultural and food chemistry》1974,22(5):819-824

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Metabolic syndrome in the elderly living in marginal peri-urban communities in Quito, Ecuador     

Sempértegui F  Estrella B  Tucker KL  Hamer DH  Narvaez X  Sempértegui M  Griffiths JK  Noel SE  Dallal GE  Selhub J  Meydani SN 《Public health nutrition》2011,14(5):758-767

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