全文获取类型
| 收费全文 | 53篇 |
| 免费 | 4篇 |
| 国内免费 | 1篇 |
专业分类
| 1篇 | |
| 综合类 | 6篇 |
| 畜牧兽医 | 51篇 |
出版年
| 2021年 | 1篇 |
| 2020年 | 2篇 |
| 2019年 | 2篇 |
| 2017年 | 3篇 |
| 2016年 | 2篇 |
| 2015年 | 1篇 |
| 2014年 | 2篇 |
| 2013年 | 7篇 |
| 2010年 | 4篇 |
| 2009年 | 1篇 |
| 2005年 | 2篇 |
| 2003年 | 1篇 |
| 2001年 | 2篇 |
| 2000年 | 2篇 |
| 1998年 | 5篇 |
| 1997年 | 2篇 |
| 1996年 | 1篇 |
| 1995年 | 1篇 |
| 1994年 | 3篇 |
| 1993年 | 3篇 |
| 1992年 | 1篇 |
| 1990年 | 1篇 |
| 1989年 | 4篇 |
| 1987年 | 1篇 |
| 1974年 | 1篇 |
| 1971年 | 1篇 |
| 1969年 | 1篇 |
| 1938年 | 1篇 |
排序方式： 共有58条查询结果，搜索用时 265 毫秒
11.
12.
LG PAPAZOGLOU GD BRELLOU PL PAPADOPOULOU AK DESSIRIS 《Australian veterinary journal》2005,83(1-2):37-37
13.
14.
Lowrey A. Smith 《Soil & Tillage Research》1993,25(4):281-299
Specific energy requirements of eight implements were evaluated as crop production practices were performed. Tractor instrumentation which measured engine speed, ground speed, fuel consumption, and draft was used to collect data for up to nine combinations of gear selection and engine speed while other operating parameters were maintained as consistent as possible. The equipment was operated on Tunica clay (Vertic Haplaquept) and Dundee very fine sandy loam (Aeric Ochraqualfs). Results demonstrated the validity of the ‘shift-up throttle-back’ concept with potential fuel savings of 20–30%. Fuel consumption data revealed that 45–60% of the fuel consumed was required to propel the tractor. Average draft, drawbar power, and specific energy requirements were presented for performing crop production practices throughout the crop season. Draft from the disk bedders responded to ground speed similarly to the disk plow response given by ASAE Data D230.4. A general relationship between net fuel consumption and draft for all implements and for all operating conditions experienced during the study was demonstrated. 相似文献
15.
16.
17.
AIM: To investigate the occurrence of resistance to macrocylic lactone (ML) anthelmintics by Ostertagia circumcincta in lambs on a sheep and cattle property in the North Island of New Zea- land. METHODS: Thirty lambs were randomly allocated to one of five equal-sized groups, consisting of an untreated control and four treatment groups. The treatments, which were administered at the manufacturer's recommended dose rates, included oral moxidectin, oral abamectin (both at 0.2 mg/kg), an albendazole-levamisole combination, and an albendazole-levamisole-ivermectin combination. Post mortem worm counts were undertaken 7 days after treatment to determine the efficacy of each anthelmintic. RESULTS: The albendazole-levamisole and albendazole-levam-isole-ivermectin combinations both reduced O. circumcincta burdens to zero whereas for moxidectin and abamectin efficacies of only 72% and 29%, respectively, were recorded. CONCLUSIONS: These results clearly demonstrated the occurrence of resistance to MLs by O. circumcincta. Although this is not the first occasion where resistance to this anthelmintic family has been detected in this parasite in sheep in New Zealand, it is the first instance that resistance to either moxidectin or abamectin has been reported. 相似文献
18.
19.
Miguel Gozalo-Marcilla Stelio PL. Luna Nadia Crosignani José NP Puoli Filho Fábio S. Possebon Ludovic Pelligand Polly M. Taylor 《Veterinary anaesthesia and analgesia》2017,44(5):1116-1127
Objective
To evaluate intravenous (IV) detomidine with methadone in horses to identify a combination which provides sedation and antinociception without adverse effects.Study design
Randomized, placebo-controlled, blinded, crossover.Animals
A group of eight adult healthy horses aged (mean ± standard deviation) 7 ± 2 years and 372 ± 27 kg.Methods
A total of six treatments were administered IV: saline (SAL); detomidine (5 μg kg?1; DET); methadone (0.2 mg kg?1; MET) alone or combined with detomidine [2.5 (MLD), 5 (MMD) or 10 (MHD) μg kg?1]. Thermal, mechanical and electrical nociceptive thresholds were measured, and sedation, head height above ground (HHAG), cardiopulmonary variables and intestinal motility were evaluated at 5, 15, 30, 45, 60, 75, 90, 120 and 180 minutes. Normal data were analyzed by mixed-model analysis of variance and non-normal by Kruskal–Wallis (p < 0.05).Results
Nociceptive thresholds in horses administered methadone with the higher doses of detomidine (MMD, MHD) were increased above baseline to a greater degree and for longer duration (MMD: 15–30 minutes, MHD: 30–60 minutes) than in horses administered low dose with methadone or detomidine alone (MLD, DET: 5–15 minutes). No increases in nociceptive thresholds were recorded in SAL or MET. Compared with baseline, HHAG was lower for 30 minutes in MMD and DET, and for 45 minutes in MHD. No significant sedation was observed in SAL, MET or MLD. Intestinal motility was reduced for 75 minutes in MHD and for 30 minutes in all other treatments.Conclusions
Methadone (0.2 mg kg?1) potentiated the antinociception produced by detomidine (5 μg kg?1), with minimal sedative effects.Clinical relevance
Detomidine (5 μg kg?1) with methadone (0.2 mg kg?1) produced antinociception without the adverse effects of higher doses of detomidine. 相似文献20.
本文对47例癫痫患者血浆皮质醇浓度作了测定,结果表明:癫痫发作期及间歇期的血浆皮质醇浓度高于对照组(P<0.01,0.05),发作期又高于间歇期(P<0.01);原发性癫痫控制期与对照组浓度比较无差异(P>0.05);继发性癫痫发作期、间歇期浓度分别高于原发性癫痫发作期、间歇期(P<0.01);苯妥英钠治疗与丙戊酸钠治疗组浓度比较元差异(P>0.05),但后者高于对照组(P<0.05)。对其机理和临床意义作了探讨。 相似文献