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411.
The dye-resist effect of reactive dye-resist agents in acid dyeing of silk was investigated. The dye-resist agent containing
dichlorotriazine achieved a higher resist effectiveness than others since they make a charge barrier against diffusion in
the silk fiber periphery due to the high reactivity of dichlorotriazine group. Especially, the increase in the number of ionic
groups in acid dyes leads to better electrostatic repulsion of reactive dye resist agent treated silk and thus improves the
resist effectiveness. However, the hydrophobicity effect of acid dyes on the dye-resist properties was relatively minor. 相似文献
412.
Kwan Woo Kim Keun Hyung Lee Bong Seok Lee Yo Seung Ho Seung Jin Oh Hak Yong Kim 《Fibers and Polymers》2005,6(2):121-126
Semicrystalline poly(ethylene terephthalate) (cPET)/amorphous poly(ethylene terephthalate) with isophthalic acid (aPET) blends
with 100/0, 75/25, 50/50, 25/75, and 0/100 by weight ratios were dissolved in a mixture of trifluoroacetic acid (TFA)/methylene
chloride (MC) (50/50, v/v) and electrospun via the electrospinning technique. Solution properties such as solution viscosity,
surface tension and electric conductivity were determined. The solution viscosity slightly decreased as aPET content increased,
while there was no difference in surface tension with respect to aPET composition. The characteristics of the electrospun
cPET/aPET blend nonwovens were investigated in terms of their morphology, pore size and gas permeability. All these measurements
were carried out before and after heat treatment for various blend weight ratios. The average diameter of the fibers decreased
with increasing aPET composition due to the decrease in viscosity. Also, the morphology of the electrospun cPET/aPET blend
nonwovens was changed by heat treatment. The pore size and pore size distribution varied greatly from a few nanometers to
a few microns. The gas permeability after heat treatment was lower than that before heat treatment because of the change of
the morphology. 相似文献
413.
The ability to absorb liquid and the dust removal performance are important factors for wiping cloths used to remove contaminants. We have developed a method that can determine the contaminant removal performance of wiping cloths. In the gravimetric method, experimental errors are unavoidable because the contaminant plate is much heavier than the contaminant material. However, we used image analysis to reduce the experimental errors, and did not use the heavy contaminant plate. The correlation coefficient between the image analysis and the gravimetric methods was very high, at R=0.97, with a significance level of 95 %. From the correlation analysis and empirical data, the image analysis method is a useful tool for measuring wiping efficiency. The wiping efficiency measured using image analysis has a close relationship to the wiping speed, viscosity of the contaminant, and wiping pressure, at the significance level of 95 %. 相似文献
414.
Kang JH Song KH Woo JK Park MH Rhee MH Choi C Oh SH 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(3):298-305
Cancer prevention is effective and reduces health care costs because cancer is often a preventable disease that can be affected
by lifestyle factors. Therefore, researchers are interested in discovering natural compounds that have anticancer activities,
such as delaying the development of cancer and preventing its progression. One such natural agent is ginseng (Panax ginseng), which is traditionally used in some parts of the world as a popular remedy for various diseases including cancer. We hypothesized
that the ginsenoside Rp1, a component of ginseng, reduces cancer cell proliferation through inhibition of the insulin-like
growth factor 1 receptor (IGF-1R)/Akt pathway. We first tested the efficacy of Rp1 against human breast cancer cell lines.
Treatment with Rp1 inhibited breast cancer cell proliferation and inhibited both anchorage-dependent and -independent breast
cancer cell colony formation. In addition, treatment with 20 μM Rp1 induced cycle arrest and apoptosis-mediated cell growth
suppression. Our findings further indicated that Rp1 decreased the stability of the IGF-1R protein in breast cancer cells.
Therefore, we suggest that Rp1 has potential as an anticancer drug and that IGF-1R is an important target for treatment and
prevention of breast cancer. 相似文献
415.
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417.
Identification of lactoferrin and glutamate receptor‐interacting protein 1 in bovine cervical mucus: A putative marker for oestrous detection
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WY Lee MH Park KW Kim H Song KB Kim CS Lee NK Kim JK Park BC Yang KB Oh GS Im HJ Chung 《Reproduction in domestic animals》2017,52(1):16-23
Accurate detection of oestrus is important for artificial insemination. The aim of this study was to identify oestrous‐specific bovine cervical mucus proteins that could be used to determine the optimal time for artificial insemination. Non‐oestrous and controlled internal drug release (CIDR)‐induced oestrous‐stage mucus proteins were purified and subjected to surface‐enhanced laser desorption/ionization time‐of‐flight mass spectrometry, sodium dodecyl sulphate polyacrylamide gel electrophoresis and MALDI‐TOF/TOF. Among differentially expressed proteins, lactoferrin (LF) and glutamate receptor‐interacting protein 1 (GRIP1) showed a twofold increase during the CIDR‐induced oestrous stage compared to the levels in non‐oestrous stage in bovine cervical mucus. The RT‐PCR, Western blotting and immunohistochemistry results showed that LF and GRIP1 expression was significantly increased during the oestrous stage in the uterus. This study demonstrated that bovine LF and GRIP1 exist during the oestrous stage, but not during the non‐oestrous stage, suggesting that cervical mucus LF and GRIP1 are useful oestrous detection markers in cattle. 相似文献
418.
Jinsheng Cui Eunji Kim Dong Hyun Moon Tae Ho Kim Ilnam Kang Yeonjung Lim Daniel Shin Sunghoon Hwang Young Eun Du Myoung Chong Song Munhyung Bae Jang-Cheon Cho Jichan Jang Sang Kook Lee Yeo Joon Yoon Dong-Chan Oh 《Marine drugs》2022,20(6)
Two new lipo-decapeptides, namely taeanamides A and B (1 and 2), were discovered from the Gram-positive bacterium Streptomyces sp. AMD43, which was isolated from a mudflat sample from Anmyeondo, Korea. The exact molecular masses of 1 and 2 were revealed by high-resolution mass spectrometry, and the planar structures of 1 and 2 were elucidated using NMR spectroscopy. The absolute configurations of 1 and 2 were determined using a combined analysis of 1H-1H coupling constants and ROESY correlations, the advanced Marfey’s method, and bioinformatics. The putative nonribosomal peptide synthetase pathway for the taeanamides was identified by analyzing the full genome sequence data of Streptomyces sp. AMD43. We also found that taeanamide A exhibited mild anti-tuberculosis bioactivity, whereas taeanamide B showed significant bioactivity against several cancer cell lines. 相似文献
419.
Pavani Dulanja Dissanayake Kumuduni Niroshika Palansooriya Mee Kyung Sang Dongyeop X. Oh Jeyoung Park Sung Yeon Hwang Avanthi Deshani Igalavithana Cheng Gu Yong Sik Ok 《Soil Use and Management》2022,38(3):1446-1458
Accumulation of microplastics (MPs) in agricultural environments has caused growing concern in recent years because of its detrimental impacts on soil quality, crop productivity and ecosystem function. This study was conducted to assess the impact of biochar on soil chemical and microbial properties in a MP-contaminated soil under two moisture regimes. Soil was contaminated with 1% (w/w) of low-density polyethylene MPs. Four types of standard biochar, that is, oil seed rape (OSR) biochar produced at 550°C (OSR 550) and 700°C (OSR 700) and soft wood pellet (SWP) biochar produced at 550°C (SWP 550) and 700°C (SWP 700), were applied at a rate of 5% (w/w). The control was maintained without MP addition. The samples were incubated in soil with two moisture regimes, that is, at 30% and 70% of the water holding capacity, and the soil chemical and microbiological properties were assessed after 100 days of incubation. OSR biochar application significantly increased soil pH (8.53–8.81) and electrical conductivity (0.51–0.58 dS/m) in both moisture regimes. The effect of biochar application on soil enzyme activity and microbial community composition did not show a clear trend. However, SWP 700 biochar improved soil enzyme activity compared with that of the control and improved bacterial diversity and evenness compared with those of other biochars, which was attributed to the high surface area available for microbial colonization. Low soil moisture content significantly reduced enzyme activity and bacterial richness even with biochar amendment, except for SWP 550 biochar. This study implies the suitability of biochar for improvement of soil quality in MP contaminated soil under both moisture regimes. However, further long-term studies are needed to get a clear understanding on the impact of different types of biochar on MP-contaminated soil. 相似文献