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91.
Summary Heritability and gene effects for root weight, root volume and root to shoot weight ratio were determined in peas (Pisum sativum L.) at flowering. The populations used were developed from four crosses between lines and cultivars differing in size of the root systems. Broad-sense heritability was between 0.41 and 0.81 for root weight, and between 0.44 and 0.77 for root volume. Additive and dominance effects were important in the genetic control of root weight and volume in all populations, while epistatic effects were important only in two populations. The importance of the genetic parameters in the control of root to shoot weight ratio was unclear. Assuming high correlations between root growth in soil-filled pots in the greenhouse and growth in the field, with the presence of large additive effects and high heritability estimates for root weight and volume, selection for superior pure lines with large root systems should be effective. 相似文献
92.
Jiang W Yun D Saleh L Barr EW Xing G Hoffart LM Maslak MA Krebs C Bollinger JM 《Science (New York, N.Y.)》2007,316(5828):1188-1191
In a conventional class I ribonucleotide reductase (RNR), a diiron(II/II) cofactor in the R2 subunit reacts with oxygen to produce a diiron(III/IV) intermediate, which generates a stable tyrosyl radical (Y*). The Y* reversibly oxidizes a cysteine residue in the R1 subunit to a cysteinyl radical (C*), which abstracts the 3'-hydrogen of the substrate to initiate its reduction. The RNR from Chlamydia trachomatis lacks the Y*, and it had been proposed that the diiron(III/IV) complex in R2 directly generates the C* in R1. By enzyme activity measurements and spectroscopic methods, we show that this RNR actually uses a previously unknown stable manganese(IV)/iron(III) cofactor for radical initiation. 相似文献
93.
Evaluation of Heavy Metal Pollution in the Arabian Gulf Using the Clam Meretrix meretrix Linnaeus, 1758 总被引:1,自引:0,他引:1
Hamad Alyahya Amel H. El-Gendy Saleh Al Farraj Magdy El-Hedeny 《Water, air, and soil pollution》2011,214(1-4):499-507
The present study is an attempt to assess the heavy metal contamination in the marine environment of the Arabian Gulf of Saudi Arabia. The concentrations of heavy metals in water and the soft tissues of the bivalve species Meretrix meretrix Linnaeus, 1758, from different stations along the Arabian Gulf coastline, were determined during the summer season of 2008. Bioaccumulation of some heavy metals (Cd, Pb, Cu, and Zn) in fresh parts of the clam (M. meretrix) was measured by an atomic absorption spectrophotometer. The average concentrations of heavy metals in the clam tissues were 0.224?C0.908, 0.294?C2.496, 3.528?C8.196, and 12.864?C24.56 mg/kg wet weight for Cd, Pb, Cu, and Zn, respectively. In water, the mean concentration values of these metals were arranged in the following descending order: Pb > Cu > Zn > Cd. The heavy metal concentrations in tissues of M. meretrix were within the acceptable standards set by the US Environmental Protection Agency, the Commission Européenne, and the Food and Drug Administration of the USA. From the human public health point of view, these results seem to show no possibility of acute toxicities of Cd, Cu, Pb, and Zn if the edible clam is consumed. It is recommended that relevant authorities should carry out a continual assessment on the levels of these pollutants in the studied area. 相似文献
94.
Spierings D McStay G Saleh M Bender C Chipuk J Maurer U Green DR 《Science (New York, N.Y.)》2005,310(5745):66-67
The mitochondrial pathway of apoptosis in vertebrates is dependent on the process of mitochondrial outer membrane permeabilization (MOMP), which leads to the release of proteins from the mitochondrial intermembrane space into the cytosol. "Upstairs" of this event are the Bcl-2 family proteins that regulate and mediate MOMP; "downstairs" is the activation of caspases that orchestrate the dismantling of the cell. In the Connections Map database at Science's Signal Transduction Knowledge Environment (STKE), the pathways that define the mitochondrial pathway of apotosis are illustrated, with the bulk of control occurring "upstairs" of MOMP. 相似文献
95.
The unripe fruits ofSolanum pseudomeum were found to contain two glyco-alkaloids, identified as solamargine and solasonine. The glyco-alkaloids fraction afforded after hydrolysis one steroidal alkaloid, identified as solasodine. The neutral glycoside fraction, gave after hydrolysis a steroid sapogenin: chlorogenin. Three phytosterols were isolated from the unsaponifiable matter of the lipid fraction, identified as -sitosterol, campesterol and stigmasterol.
Zusammenfassung Man fand, daß die unreifen Früchte vonSolanum pseudomeum zwei Glyco-Alkaloide, nämlich Solamargin und Solasonin, enthalten. Die Fraktion der Glyco-Alkaloide ergab nach der Hydrolyse ein Steroid-Alkaloid, dieses wurde als Solasodin identifiziert. Die neutrale Glykosid-Fraktion ergab nach der Hydrolyse das Steroid-Sapogenin Chlorogenin. Die Auftrennung des unverseifbaren Anteils der Lipid-Fraktion ergab drei Phytosterine, die als -Sitosterin, Campesterin und Stigmasterin identifiziert wurden.
Résumé Les fruits verts (non mûrs) duSolanum pseudomeum, contiennent deux glycoalcaloides, identifiés comme suit: solamargine et solasonine. Un alcaloide stéroidique a été obtenu par hydrolyse de la fraction glyco-alcaloides; et identifié comme suit: solasodine. La fraction glycosidique neutre, a donné après hydrolyse un sapogenin stéroidique chlorogenin. Trois phytosterols ont été isolés de la masse non-saponifiable de la fraction lipide et identifiés comme suit; -sitosterol, campesterol et stigmasterol.相似文献
96.
Dr. N. A. M. Saleh A. E. A. El Sherbeiny H. I. El Sissi 《Plant foods for human nutrition (Dordrecht, Netherlands)》1971,20(4):311-328
In this part, 32 plants (rubiaceae tovitaceae) are investigated in a search for local tanning materials. Colour tests along with the chromatographic investigation of the free sugars and phenolic aglycones are given. A conclusion of all the plants previously studied is given discussing the collective data of the colour tests, free sugars and phenolic aglycones separately.
Part VI, this journal: XX, 4 :297–309, 1971 相似文献
Zusammenfassung In diesem letzten Teil einer Serie von Veröffentlichungen über lokal vorkommende Pflanzen als potentielle Quelle für Gerbstoffe, werden die Untersuchungsergebnisse von weiteren 32 Pflanzen (aus den FamilienRubiaceae bisVitaceae) beschrieben.Farbtests, spezifisch für Tannine, zusammen mit chromatographischen Untersuchungen auf freie Zucker und phenolische Aglykone wurden durchgeführt.Zusammenfassend werden die Ergebnisse aus dem Farbtest, der Analysen auf freie Zucker und phenolische Aglykone an allen bisher in die Untersuchungen einbezogenen Pflanzen diskutiert.
Resume Trente-deux plantes (des familiesRubiaceae à Vitaceae) ont été examinées afin de déterminer le site de localisation des tannins. Les tests colorés et les résultats chromatographiques des sucres libres et des aglycones phénoliques sont décrits.Une conclusion de toutes les plantes déjà examinées du point de vue des tests colorés est présentée ainsi qu'une discussion générale des résultats individuels des sucres libres et des aglycones phénoliques.
Part VI, this journal: XX, 4 :297–309, 1971 相似文献
97.
Journal of Plant Diseases and Protection - The ability of the nematode antagonistic, mutualistic endo-phyte Fusarium oxysporum strain 162, to colonize the endorhiza of different Fusarium wilt... 相似文献
98.
This study explores the occurrence of Non-alcoholic Fatty Liver Disease (NAFLD), Insulin Resistance (IR), dyslipidemia and atherogenic ratios in epileptic children and adolescents receiving Valproic Acid (VPA), Carbamazepine (CBZ) or both (combination therapy) compared to healthy controls. Abdominal Computerized Tomography (CT), measurements of serum fasting insulin, glucose, serum lipids and liver enzymes were performed in VPA (n = 14), CBZ (n = 14) or both (n = 10) treated non-diabetic non-obese epileptic patients compared to healthy controls (n = 10). Abdominal CT demonstrated characteristics of fatty liver disease in 42.8% of VPA, in 21.4% of CBZ, in 60% of combination therapy treated patients and none of the healthy controls. All of them were overweight and 53.3% had IR. In conclusion VPA therapy was associated with increased risk of IR and NAFLD, while CBZ therapy was associated with dyslipidemia and combination therapy was associated with all these risks. 相似文献
99.
Z Akhlaghi JI Mobarakeh M Mokhtari H Behnam AA Rahimi MS Khajeh Hosseini F Samiee 《Iranian Biomedical Journal》2012,16(2):107-112
Background: Initial studies have shown that low-energy ultrasound stimulates living tissue cells to reduce regeneration or speed up their recovery. The purpose of this study was to examine the effects of various ultrasound parameters on the speed of recovery in injured sciatic nerves NMRI.Methods: NMRI mice (n = 200) with injured left paw, caused by crushing their sciatic nerves, were randomly selected. The animals were exposed to ultrasound radiation with various frequencies, intensities, and exposure time. They were allocated into 20 groups (19 treatment and 1 control groups). Sciatic functional index (SFI) test was used to evaluate the difference between the groups with respect to functional efficiency of the sciatic nerve and its recovery. SFI ، (P=0.000).Results: The results of SFI test obtained from the 14th day showed a significant difference among the groups (P<0.05). On the 14th day after treatment, one of the groups (US11) recovered up to 90%..Conclusion: Altered ultrasound exposure parameters had more favorable outcomes compared with our previous work.Key Words: Sciatic nerve, Ultrasonic therapy, Regeneration 相似文献
100.
Cottonseed oil as a complementary lipid source in diets for gilthead seabream Sparus aurata juveniles 下载免费PDF全文
The efficacy of using cottonseed oil (CSO) as a fish oil (FO) substitute in gilthead seabream (Sparus aurata) juveniles feed was evaluated. Fish (BWi 4.0 ± 2.9 g) were fed one of four isoproteic (~48% CP) and isolipidic (~18% L) diets for 9 weeks. Added oil was either FO (control diet, CTRL) or CSO, replacing 50% (CSO50 diet), 60% (CSO60 diet) and 70% (CSO70 diet) of dietary FO. Results indicated that FO replacement by CSO up to 60% level had no detrimental effects on growth or nutritive utilization and composition in fish muscles. Higher CSO intake (CSO70 diet, 56 g kg?1) led to a 16% reduction in weight gain, 14% in feed utilization (FCR) and 57% in muscle n‐3 long‐chain polyunsaturated fatty acids (lc PUFA) as compared with CTRL and to abundant accumulation of lipid within the hepatocytes. Use of CSO altered fatty acid (FA) profiles of muscle and liver. Data suggested utilization of linoleic acid (LOA) by fish and retain of docosahexaenoic acid (DHA) in muscles. Therefore, limits of CSO inclusion as the main source of supplementary dietary lipid, with no negative effects on fish performance or nutritive composition and utilization in muscles, are: 40–48 g kg?1 feed for gilthead seabream juveniles. 相似文献