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81.
Fatma A. R. Attia 《Irrigation and Drainage Systems》1989,3(2):153-167
In Egypt, the reclamation of new lands takes place on the fringes of the Nile Valley and Delta. Few years after the reclamation
of new lands, water logging problems developed in the adjacent traditionally cultivated lands. The extent of the problem is
considerably large, thus imposing constraint to land productivity. This dictates thorough investigations of the causes of
and possible solutions to relief these problems.
This paper presents the results of investigations carried out in order to identify the causes and extent of water logging
problems in Beni Suef and Minia Governorates as a result of reclaiming two areas on their fringes. Proposed short and long-term
solutions are also given. 相似文献
82.
In this work, the effects of machine parameters on the fabric spirality, which is an important quality problem of single jersey
knitted fabrics, are investigated. For this aim, two circular knitting machines with the same gauge, but one of them revolving
in the reverse direction, are chosen. Single jersey fabric samples with the same weight per square meter and the same yarn
count (Ne 20 Cotton) are knitted on the chosen machines at four different numbers of knitting systems. The effects of the
number of the knitting systems and the rotation directions of the machines on the spirality angles are investigated. 相似文献
83.
The adaptation of the primary internal parasitoid,Trichogramma evanescens (Westw.), as an egg parasitoid ofLobesia botrana (Den. & Schiff.) was the first report in Alexandria region, Egypt. The life-span of this parasitoid on eggs ofL. botrana andSitotroga cerealella Ol. was investigated. The duration from egg to adult, longevity of adult stage, sex-ratio and total life cycle each of the two hosts were recorded. The ovipositional periods of mated females ofT. evanescens on egg ofL. botrana at 27±2co and 75±2% R.H. were studied. Also, percentages of parasitism byT. evanescens ranged from 22%–64% on the eggs ofL. botrana. Therefore, this parasitoid was very efficient as a biocontrol agent against the most serious grape pestL. botrana in Egypt. 相似文献
84.
Pregnancy toxemia is a metabolic disease of pregnant ewes which causes significant economic losses in sheep industry. The
pathophysiology and metabolic changes of this disorder remain poorly understood. We conducted this study to describe the serum
protein pattern associated with the pregnancy toxemia in ewes. In this study, the electrophoretic pattern of serum proteins
of 15 ewes with naturally occuring pregnancy toxemia and 12 ewes with uncomplicated pregnant were investigated by Sodium Dodecyl
Sulfate Polyacrylamide Gel Electrophoresis (SDS-PAGE). Serum protein patterns were mainly characterized by four bands and
located in the 76 kDa, 66 kDa, 55 kDa and 29 kDa both diseased and control groups. The percent of the 66 kDa, 55 kDa and 29 kDa
proteins were decreased (P < 0.001 for 66 kDa; P < 0.01 for 55 kDa and P < 0.05 for 29 kDa) while 76 kDa (P < 0.05) protein
was significantly increased (P < 0.001) in ewes with pregnancy toxemia relative to controls. Positive correlations were found
between activities of liver enzymes and percentage of the distribution in 76 kDa, 55 kDa proteins. In contrast, there was
a negative correlation between the 66 kDa protein and liver enzymes. In conclusion, the results of this study demonstrate
that the percentages of the 76 kDa, 66 kDa, 55 kDa and 29 kDa proteins are significantly altered in ewes with pregnancy toxemia.
However, further studies are needed to explore the potential role of these alterations in the pathophysiology in ewe with
pregnancy toxemia. 相似文献
85.
This study was carried out to determine serum protein profiles in naturally infected sheep with foot-and-mouth disease virus (FMDV). The study material consisted of twelve healthy and 36 sheep with foot-and-mouth disease (FMD). FMD had been diagnosed on the basis of clinical findings and results of serological examination. Serotypes serologically detected in the FMDV-infected sheep were as follows: O (n = 11), A (n = 8) and mixed infection with serotypes O, A and Asia-1 (n = 17).The total protein, albumin and globulin concentrations as well as Albumin/Globulin ratio were slightly different among the groups (P < 0.05). Three protein bands of 66 kDa, 45 kDa and 20 kDa were remarkable. Moderate differences were determined between healthy and infected sheep for proportion of distribution in serum proteins. In conclusion, serum protein concentrations and serum protein profiles were slightly changed and no specific serum protein profile occurred in sheep infected with either O or A or in sheep mixed infected with the O and A and Asia-1 serotypes of FMDV compared to healthy ones. 相似文献
86.
Aslantaş Ö Öztürk F Ceylan A 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(12):1645-1648
Macrolide and lincosamide (ML) resistance and the related resistance genes of staphylococci were assessed from cases of bovine subclinical mastitis. Of the 104 Staphylococcus aureus and 62 coagulase negative staphylococcus (CoNS) isolates, 26 (25%) and 12 (19.4%) were resistant to ML, respectively. While constitutive ML resistance phenotype accounted for 15.4% (16/104) of S. aureus and 8.1% (5/62) of CoNS, inducible ML resistance phenotype accounted for 2.9% (3/104) of S. aureus and 3.2% (2/62) of CoNS. Among erythromycin-resistant isolates, single or various combination of different resistance genes were detected. The results of this study showed that ML resistance was prevalent among staphylococci from subclinical bovine mastitis cases in Hatay, Turkey. Therefore, a continuous surveillance is necessary to minimise the spread of antimicrobial-resistant staphylococci. 相似文献
87.
Florfenicol (FFC) as a chloramphenicol’s derivative is a special broad-spectrum antibiotic that was used in veterinary clinics. In the present study, we investigated the effect of different doses of FFC on the humoral immune response of broiler chickens to Newcastle disease virus (NDV) vaccine under the impact of E. coli infection. In addition, the expression of the interferon-inducible genes (IRF7, 2′-5′OAS and Mx1) were analyzed in the spleen tissue of these chickens using quantitative real-time PCR (qRT-PCR). The non-treated group with FFC and non-infected with E. coli had the highest immune responses against NDV compared with the FFC treated groups. In the case of E. coli infection, the group treated with FFC (30 mg/Kg BWt) showed lower NDV HI and IgG ELISA Ab levels compared to the group treated with FFC (60 mg/Kg BWt). A dose dependent up-regulation was observed in the level of the interferon-alpha pathway related genes (IRF7 and 2′-5′OAS) in the FFC treated groups compared to the non-treated group. At the slaughter time, the numbers of adipocyte in the bone marrow were significantly higher with moderate atrophy of the hematopoietic lineages in the FFC treated birds compared to the non-treated birds. These results indicated that this FFC dosage dependent increase in the humoral immune responses against NDV vaccine could be attributed to its efficient therapeutic effect on the E. coli infection. However, the increase in the FFC dosage can negatively but temporarily affect the chicken body weights. Additionally, it can exert up regulation effect on the chicken innate immune response with moderate hypoplasia of the bone marrow cells. 相似文献
88.
Hafidh Akkari Kais Rtibi Fatma B’chir Mourad Rekik Mohamed Aziz Darghouth Mohamed Gharbi 《Veterinary research communications》2014,38(3):249-255
Occurrence of anthelmintic resistant strains of helminths is increasing. The aim of this study was to evaluate the in vitro anthelmintic activity of Artemisia campestris in comparison to albendazole against Haemonchus contortus of sheep. In this respect, in vitro anthelmintic activities of crude aqueous and crude ethanolic extracts of aerial parts of A. campestris were investigated on eggs and adults of Haemonchus contortus. Chemical analyses revealed that overall profile of both extracts samples were dominated by flavonoids among them quercetin and apigenin derivatives were the most abundant phenolics constituents. Both extract types completely inhibited egg hatching at a concentration close to 2 mg/ml. Lethal concentration 50% of A. campestris ethanolic and aqueous extracts were 0.83 and 1.00 mg/ml respectively (p?0.05). The ethanolic extract showed better in vitro activity against adult parasites than the aqueous extract in terms of the paralysis and/or death of the worms at different hours post-treatment. Dose dependent activity was also observed for both extract. After 8 and 24 h of exposure, the ethanolic extract induced 91.3 and 100% mortality at the highest tested concentration respectively, while the aqueous extract induced 3.22 and 70.96% at the same concentration respectively. To our knowledge, these results depict for the first time that A. campestris possesses in vitro anti-Haemonchus contortus properties. 相似文献
89.