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11.
Oguro M Kawamura S Takayama M Ishikawa H Miura T Otsuka H Hoshi F 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2003,65(9):1037-1039
Unthrifty calves occurred sporadically in Japanese Black (beef cattle) in an area in northeastern Japan. The states of unthrifty development, pedigree, clinico-biochemistry and the secretory function of bovine growth hormone (bGH) in pituitary were investigated. The total cholesterol concentration and CK, AST and LDH activities in the serum showed higher values than those of control calves. Basal bGH concentrations in the serum and bGH secretory reactivity in the insulin tolerance test (ITT) were showed to be significantly lower than those of the control calves. Furthermore, sperm donated from a specific bull had been used for these unthrifty calves. This study suggested that the present occurrence of unthrifty calves represented ateliosis possibly caused by congenital hypopituitarism which decreased of bGH secretory function. 相似文献
12.
Satoshi Tahara Masanori Mizutani Tomohiko Takayama Kaori Ohkawa 《Pest management science》1999,55(2):209-211
A number of compounds isolated from various plant species were tested for their ability to affect the mobility of zoospores of the fungus Aphanomyces cochlioides which causes root rot in spinach (Spinacia oleracea). Compounds may act as attractants, repellents or stimulants of zoosphore movement or they may halt movement by causing the spore to clump and settle. Bioassay revealed compounds with these methods of action, as well as some which acted directly on the fungus. ©1999 Society of Chemical Industry 相似文献
13.
Masato Yoshida Hiroyuki Yamamoto Takashi Okuyama Teruko Nakamura 《Journal of Wood Science》1999,45(5):368-372
One of the roles of growth stress in branch shape formation was investigated using a weeping-type Japanese cherry,Prunus spachiana. Negative released strains, caused by longitudinal tensile growth stresses, were detected in the upper side of gibberellin A3-treated (GA3-treated) and control branches. The mean value of the released strain in the upper side of the treated branches was –0.104%, which was larger than the value (–0.067%) observed in the control branches. Both branches formed tension wood in the upper side of the xylem, and the treated branches formed tension wood near the pith as well. This suggested that the treated branches generated larger tensile growth stress from the early growth stages. The successive generation of growth stress from the early growth stages was considered to generate forces large enough to bend the branch upward. 相似文献
14.
T. Matsumoto Y. Nagashima K. Takayama K. Shimakura K. Shiomi 《Fish physiology and biochemistry》2006,31(1):95-100
In vitro accumulation of tetrodotoxin (TTX) and paralytic shellfish toxin (PST) in tiger puffer fish Takifugu rubripes was investigated using liver tissue slices. When T. rubripes liver slices were incubated with Leibovitz’s L-15 medium containing 0.13 mM TTX at 20 °C in air with saturated humidity,
they accumulated 21.5 ± 7.3 μg TTX g−1 liver after the incubation for 12 h and increased to 55.3 ± 8.2 μg TTX g−1 liver at 48 h. In the incubation of T. rubripes liver slices with 0.13 mM PST-containing medium, PST was detected 6.3 ± 0.9 μg g−1 liver at 12 h and reached a plateau thereafter. These results reveal the difference between TTX and PST in accumulation in
T. rubripes liver tissue slices. To examine the variation in PST accumulation among fish species, the liver tissue slices from tiger
puffer fish T. rubripes, parrot-bass Oplegnathus fasciatus and green ling Hexagrammos otakii were incubated at a concentration of 0.027 mM PST. The toxin contents of 3.0 μg g−1 liver were observed at 8 h regardless of fish species but were not increased subsequently, showing no variety among these
three species as to accumulation patterns of PST. It is noted that the tiger puffer fish T. rubripes liver specifically accumulate TTX in preference to PST. 相似文献
15.
The antifungal activity of 61 N-phenylsuccinimides and 16 N-phenyl-1,2-dimethylcyclopropanedicarboximides having various benzene ring substituents was determined against Botrytis cinerea by the agar medium dilution method. The structure-activity relationships were analyzed using such physicochemical substituent parameters as hydrophobic π, electronic σ0, steric E8, and HB (hydrogen bonding) values with the multiple regression technique. The π values were derived from log P (octanol-water partition coefficient) values for the N-monosubstituted-phenylsuccinimide system. The hydrophobic effect is significant only for m-substitutents. The stronger the electron withdrawal and the smaller the steric dimensions of the ring substituents, the greater is the activity. When substituents are hydrogen bond acceptors, the effect is to lower the activity. These features are almost identical between two series of compounds. 相似文献
16.
Takayuki Ishikawa Tomoko Takayama Hiroshi Ishizaka Keiko Ishikawa Masahiro Mii 《Euphytica》2001,118(1):19-27
Interspecific hybrids were efficiently produced in the cross-incompatible combination between Alstroemeria pelegrina L. var. rosea and A. magenta Bayer by culturing immature ovules with placenta 7–14 days after pollination on 2 g/l Gelrite-solidified MS medium containing
3% (w/v)sucrose. The plants showed intermediate characteristics between the parents and their hybridity was confirmed by karyotype
and DNA analyses. The mean number of chromosome association per PMC at metaphase I was 2.60I+6.70II, pollen stainability was20.8%,
and they produced viable seeds after self-pollination. Furthermore, mature plants were obtained when the hybrids were backcrossed
as male parents with both the parents. The backcross-progeny from A. pelegrina var. rosea × hybrids exhibited 3.8 to 79.7% pollen stainability and that from A. magenta × hybrids 78.8 to 98.3%. Almost all of these plants produced viable seeds after self-pollination, which implies that they
can beutilized for breeding of novel cultivars of Alstroemeria.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
17.
Wibowo A Ahmat N Hamzah AS Sufian AS Ismail NH Ahmad R Jaafar FM Takayama H 《Fitoterapia》2011,82(4):676-681
A new resveratrol trimer, malaysianol A (1), five known resveratrol oligomers: laevifonol (2), ampelopsin E (3), α-viniferin (4), ε-viniferin (5), diptoindonesin A (6), and bergenin (7) have been isolated from the acetone extract of the stem bark of Dryobalanops aromatica by combination of vacuum and radial chromatography techniques. Their structures were established on the basis of their spectroscopic evidence and comparison with the published data. The cytotoxic activity of the compounds was tested against several cell lines in which compound 4 was found to inhibit strongly the growth of HL-60 cell line. 相似文献
18.
Yasuhiro UNO Masakiyo HOSOKAWA Teruko IMAI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(6):721-724
Arylacetamide deacetylase (AADAC), a microsomal serine esterase, hydrolyzes drugs, such
as flutamide, phenacetin and rifampicin. Because AADAC has not been fully investigated at
molecular levels in cynomolgus macaques, the non-human primate species widely used in drug
metabolism studies, cynomolgus AADAC cDNA was isolated and characterized. The deduced
amino acid sequence, highly homologous (92%) to human AADAC, was more closely clustered
with human AADAC than the dog, rat or mouse ortholog in a phylogenetic tree.
AADAC was flanked by AADACL2 and
SUCNR1 in the cynomolgus and human genomes. Moreover, relatively
abundant expression of AADAC mRNA was found in liver and jejunum, the drug-metabolizing
organs, in cynomolgus macaques, similar to humans. The results suggest molecular
similarities of AADAC between cynomolgus macaques and humans. 相似文献
19.
Junta Yanai Nanami Inoue Atsushi Nakao Masahiro Kasuya Kaori Ando Toshiya Oga Takayuki Takayama Hiroyuki Hasukawa Kunihiko Takehisa Akira Takamoto Kazuki Togami Tomoki Takahashi 《Soil Use and Management》2023,39(2):785-793
To prove the hypothesis that paddy rice utilizes soil nonexchangeable potassium (neK) and causes associated structural changes in clay minerals, K status and clay mineralogy of 22 surface soils from three paddy fields under long-term fertilizer management for 51–93 years were investigated. Soil neK content was determined as the difference between 1 mol L−1 hot HNO3 extractable K and 1 mol L−1 ammonium acetate exchangeable K. Clay mineralogy was identified by X-ray diffraction (XRD). The radiocesium interception potential (RIP), an index of frayed edge sites in the interlayer sites of 2:1 type clay minerals, was also determined. The neK contents under the -K and NPK treatments were considerably lower than those under the unfertilized treatment in all the fields, indicating the exploitation of soil neK by rice. XRD analysis of the clay samples revealed 7% shift from the 1.0 peak to 1.4 nm one under the -K treatment compared with the unfertilized one, and the amounts of neK were negatively correlated with those of RIP (p < .01), suggesting the expansion of interlayer spaces of the 2:1 type phyllosilicates such as mica due to the release of neK. In addition, the neK content positively correlated with K balance of the long-term experiments (p < .05). The differences of neK between unfertilized K and -K treatments corresponded to 22–157 kg K ha−1, or 0.42–1.68 kg K ha−1 year−1. In conclusion, utilization of considerable amount of soil neK under K depleted conditions should be considered to establish sustainable K management for paddy rice. 相似文献
20.
Mae N Makino Y Oshita S Kawagoe Y Tanaka A Aoki K Kurabayashi A Akihiro T Akama K Koike S Takayama M Matsukura C Ezura H 《Journal of agricultural and food chemistry》2012,60(4):1013-1019
The storage of ripe tomatoes in low-O(2) conditions with and without CO(2) promotes γ-aminobutyric acid (GABA) accumulation. The activities of glutamate decarboxylase (GAD) and α-ketoglutarate-dependent GABA transaminase (GABA-TK) were higher and lower, respectively, following storage under hypoxic (2.4 or 3.5% O(2)) or adjusted aerobic (11% O(2)) conditions compared to the activities in air for 7 days at 25 °C. GAD activity was consistent with the expression level of mRNA for GAD. The GABA concentration in tomatoes stored under hypoxic conditions and adjusted aerobic conditions was 60-90% higher than that when they are stored in air on the same day. These results demonstrate that upregulation of GAD activity and downregulation of GABA-TK activity cause GABA accumulation in tomatoes stored under low-O(2) conditions. Meanwhile, the effect of CO(2) on GABA accumulation is probably minimal. 相似文献