Wood properties and their among-family variations in 10 open-pollinated families of Picea jezoensis     

Jun Tanabe  Akira Tamura  Mika Hamanaka  Futoshi Ishiguri  Yuya Takashima  Jyunichi Ohshima  Kazuya Iizuka  Shinso Yokota 《Journal of Wood Science》2014,60(5):297-304

This study aimed to evaluate radial and among-family variations of wood properties in Picea jezoensis. A total of 174 trees were randomly selected from 10 open-pollinated families in a progeny trial for measuring stem diameter, dynamic Young’s modulus of log (DMOE_log), annual ring width (ARW), air-dry density (AD), modulus of elasticity (MOE), and modulus of rupture (MOR). Mean values of DMOE_log, AD, MOE, and MOR were 9.60 GPa, 0.41 g/cm³, 9.44 GPa, and 76.6 MPa, respectively. Significant differences among families were observed in all properties. F values obtained by analyzing variance in wood properties were higher than those generally observed in growth traits. In addition, F values in wood properties remained relatively higher from the 1st to 25th annual ring from the pith, although F value in ARW rapidly decreased with each increase in annual ring number. These results indicate that genetic factors largely contributed to the variance in wood properties compared with the growth traits.  相似文献   

A case of long-term sildenafil therapy in a young dog with pulmonary hypertension   总被引：1，自引：0，他引：1  

Toyoshima Y  Kanemoto I  Arai S  Toyoshima H 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(10):1073-1075

A 7-month-old male Papillon was presented to us with mild dyspnea, cyanosis and a diastolic murmur detected by cardiac auscultation. Echocardiography revealed severe pulmonary arterial hypertension (PH), and administration of 1 mg/kg of oral sildenafil, a phosphodiesterase type 5 (PDE5) inhibitor, twice daily was initiated. Exercise capacity, cyanosis, dyspnea and cardiac murmur were improved after therapy for 4 weeks. PCV was remarkably high (74%) after therapy for 3 years, however, increasing the dose of sildenafil decreased this value (60%). Follow-up after therapy for 4 years revealed that treatment with oral sildenafil only continued to provide the dog with an excellent quality of life, without any side effects.  相似文献   

吉林省人参种植产业发展对策分析          下载免费PDF全文

边钰雅  魏阙王博 刘爽 《现代农业研究》2019,(1):44-45

随着人参种植产业链的不断延展,人参种植业最终将形成融合了先进现代技术和设备 的产业集群。传统生产技术和加工技术形成的产业链系统由于生产管理方法分散,技术水平 低,人参质量低,规模小,产品经济特性不断追求微薄的利润,存在着诸多的发展问题,因此需要 按照现代产业链发展模式进行改造。本研究综合吉林省人参种植产业发展的现状,对于吉林省 人参种植产业未来的发展对策进行了简要的分析。研究结论对于改善吉林省人参种植产业发 展现状具有重要意义。  相似文献   

胍盐聚合物添加量对抗菌食品包装膜抗菌性及物理性能的影响     

汪敏  赵永富  谢洪德  金浴雅  黄倩 《农业工程学报》2019,35(7):303-310

为了开发出一种安全高效的抗菌食品包装材料,添加不同质量分数(0～7%)的聚六亚甲基双胍盐酸盐(polyhexamethylene biguanidine hydrochloride,PHMB)抗菌母粒到聚乙烯基材中,制成PHMB抗菌膜,比较PHMB母粒添加量对抗菌食品包装薄膜的抗菌性和性能的影响。结果表明,随着PHMB母粒添加量的增大,薄膜抗菌性增强。PHMB母粒添加量为4%时,薄膜对大肠杆菌、金黄色葡萄球菌和杂菌样品的抗菌率分别为99.1%、99.2%和83.4%,且存放6个月后薄膜仍保持较强的抗菌作用;添加PHMB母粒后,薄膜的透光率、水蒸气透过率影响较小;薄膜的力学性能在PHMB母粒添加量为4%时最优;PHMB(4%)抗菌膜对实际试样(鳕鱼干)表现出良好的微生物抑制作用。因此,确定抗菌薄膜中PHMB母粒最佳添加量为4%,薄膜具备强抗菌作用和良好的性能。该研究为抗菌材料的研制提供了参考。  相似文献   

Genetic structure and diversity of the Banana bunchy top virus population on Sumatra Island,Indonesia     

Yuya Chiaki  Nasril Nasir  Henny Herwina  Jumjunidang  Ayaka Sonoda  Tomohiro Fukumoto  Masayuki Nakamura  Hisashi Iwai 《European journal of plant pathology / European Foundation for Plant Pathology》2015,143(1):113-122

  相似文献   

Identification of a novel variant lacking group A soyasaponin in a Chinese wild soybean (Glycine soja Sieb. & Zucc.): implications for breeding significance          下载免费PDF全文

Yuya Takahashi  Xiang‐Hua Li  Chigen Tsukamoto  Ke‐Jing Wang 《Plant Breeding》2016,135(5):607-613

Group A saponins are the principal factors underlying the undesirable bitter and astringent tastes in soybean food products. Therefore, the genetic reduction or elimination of the undesirable tastes is of great significance in soybean taste breeding. Using thin‐layer chromatography and liquid chromatography–mass spectrometry, we identified a novel mutant lacking group A saponins in a wild soybean (Glycine soja Sieb. & Zucc.), reflecting the failed arabinose binding of arabinosyltransferase to the C‐22 hydroxyl group, consequently leading to a lack of group A saponins and the concomitance expression of two new components A‐αg and KA‐αg in seeds. The C‐3 glycosylated soyasapogenol A (SS‐A), A‐αg, is a steady precursor compound in biosynthesis of Aa and Ab types in the seeds of soybean plants and exhibits stable inheritance. In this study, we observed a critical step necessary for arabinose binding to the C‐22 hydroxyl group in the biosynthetic pathway of group A saponins and identified an important germplasm accession for the genetic improvement in the tastes of soybean milk and processed soybean foods.  相似文献   

Effect of intramammary infusion of recombinant bovine GM-CSF and IL-8 on CMT score,somatic cell count,and milk mononuclear cell populations in Holstein cows with <Emphasis Type="Italic">Staphylococcus aureus</Emphasis> subclinical mastitis     

Yoshio Kiku  Tomomi Ozawa  Hideyuki Takahashi  Shiro Kushibiki  Shigeki Inumaru  Hiroyuki Shingu  Yuya Nagasawa  Atsushi Watanabe  Eiji Hata  Tomohito Hayashi 《Veterinary research communications》2017,41(3):175-182

The effect of intramammary infusion of recombinant bovine granulocyte-macrophage colony-stimulating factor (rbGM-CSF) and interleukin-8 (rbIL-8) on mononuclear cell populations in quarters, somatic cell count (SCC) and the California Mastitis Test (CMT) score were investigated. From the selected cows with naturally occurring Staphylococcus aureus subclinical mastitis, one quarter of each cow were selected for the infusions of rbGM-CSF (400 μg/5 mL/quarter, n = 9), rbIL-8 (1 mg/5 mL/quarter, n = 9), and phosphate-buffered saline (5 mL/quarter, n = 7). The CMT score of both cytokines post infusion temporarily increased between days 0 and 1 and significantly decreased between days 7 and 14 compared to the preinfusion level. The SCC on day 14 after infusions of rbGM-CSF tended to be lower than that of the control group. The percentage of CD14+ cells increased on days 1 and 2 post infusion of rbGM-CSF. The percentage of CD4+ and CD8+ cells also increased on days 2 and 3, suggesting that the infusion of rbGM-CSF enhanced cellular immunity in the mammary gland. In contrast, the percentage of CD14+ cells decreased on days 0.25 and 1 post infusion of rbIL-8. No significant changes in the percentages of CD4+ and CD8+ cells in milk after infusion of rbIL-8 were evident during the experimental period, which suggested that rbIL-8 had little effect on the function of T cells in the mammary gland. These results indicated that rbGM-CSF and rbIL-8 decreased the CMT score by a different mechanism and may have a potential as therapeutic agents for subclinical mastitis.  相似文献   

Multiple Measurements of Physical Properties of Individual Cooked Rice Grains with a Single Apparatus     

Hiroshi Okadome  Hidechika Toyoshima  Ken'ichi Ohtsubo 《Cereal Chemistry》1999,76(6):855-860

Multiple measurements of physical properties of cooked rice grains were applied to 55 rice samples with waxy to high amylose contents using a single apparatus (Tensipresser). The multiple measurements consisted of low, high, and continuous progressive compression tests (LC, HC, CPC). The overall hardness (H₂) determined by the HC test, and the surface hardness (H₁) determined by the LC test, were used as indices to classify the samples into the several groups corresponding to amylose content. The surface hardness was more suitable than the overall hardness for differentiating the effect of protein contents. The difference of stickiness among the cooked rice samples could be detected by the surface adhesion distance (L₃) using the LC test. The ratio of elastic limit length (RELL), estimated by the back pressure curve on the CPC test, increased with amylose content. These three tests were meaningful in characterizing the physical properties of cooked rice samples with waxy to high amylose contents.  相似文献   

Comparative study on general properties of alginate lyases from some marine gastropod mollusks     

Mami Hata  Yuya Kumagai  Mohammad Matiur Rahman  Satoru Chiba  Hiroyuki Tanaka  Akira Inoue  Takao Ojima 《Fisheries Science》2009,75(3):755-763

Alginate lyase (EC 4.2.2.3) is an enzyme that splits glycosyl linkages of alginate chain via β-elimination, producing unsaturated oligoalginates. This enzyme is widely distributed in herbivorous marine mollusks, brown algae, and marine and soil bacteria. In the present study, we determined the general properties and partial amino acid sequences of alginate lyases from three Archeogastropoda, i.e., Haliotis discus hannai, H. iris, and Omphalius rusticus, and one Mesogastropoda, i.e., Littorina brevicula, in order to enrich the information about functional and structural diversity in gastropod alginate lyases. The alginate lyases were extracted from hepatopancreas of these animals and purified by ammonium sulfate fractionation followed by conventional column chromatography. Single alginate lyases with molecular masses of approximately 28, 34, and 34 kDa were isolated from H. discus, H. iris, and O. rusticus, respectively. While three alginate lyases with molecular masses of 35, 32, and 28 kDa were isolated from L. brevicula. These enzymes were identified as poly(M) lyase (EC 4.2.2.3) since they preferably degraded poly(M)-rich substrate. Western blot analysis using an antiserum raised against H. discus enzyme suggested that H. iris, and O. rusticus enzymes shared similar primary/higher-order structure with H. discus enzyme, but the L. brevicula enzymes did not. H. discus, H. iris, and O. rusticus enzymes were classified to polysaccharide-lyase family-14 by the analysis of partial amino acid sequences, while the L. brevicula enzymes were not.  相似文献   

A novel mutant with triple the dietary fiber content in white rice     

Minoru Nishimura  Asako Kobayashi  Ryohei Morita  Yuya Idesawa  Yusuke Sakuma  Ibuki Otosaka  Katsura Tomita 《Breeding Science》2021,71(3):390

Dietary fiber has high functional value in relation to gut flora. We searched for a high-lysine mutant of the most popular rice cultivar in Japan, ‘Koshihikari’, as a route to a higher dietary fiber content like a success case in new barley cultivar, ‘Beau-fiber’. We found several promising high-lysine mutants with high dietary fiber content. One of these, ‘WFE5’, has three times the dietary fiber content in white rice. Two rounds of backcrossing to Koshihikari produced a near-isogenic line with a high fiber content. The line’s agronomic traits were close to those of Koshihikari except for yield and eating quality. As these two traits are critical, we discuss how to improve them.  相似文献