早熟油桃新品种——‘中油桃12号’的选育     

牛良  鲁振华  崔国朝  刘淑娥  宋银花  宗学普  王志强 《果树学报》2012,(4):706-707,520

中油桃12号是通过人工杂交培育而成的早熟优质油桃新品种。果实近圆形,平均单果质量103 g,大果170 g以上。成熟时80%以上果面着玫瑰红色。果肉白色,软溶质,风味浓甜,汁液中多,含可溶性固形物12.5%,总糖9.04%,可滴定酸0.24%,维生素C 102 mg.kg-1。郑州地区3月下旬开花,5月下旬成熟,果实发育期约60 d。花铃型,花粉多,自花结实,产量稳定。黏核。  相似文献   

茂县城区泥石流防治与“5·12”震后规划重建   总被引：2，自引：0，他引：2  

倪化勇  郑万模  李宗亮 《中国水土保持》2010,(6):30-32

茂县城区受龙洞沟、药沟和水西大沟3条泥石流沟的泥石流威胁,"5·12"汶川特大地震发生后危险程度进一步加重。介绍了3条泥石流沟的情况,在震后调查的基础上,分析了"5·12"地震对3条沟的影响,以及泥石流防治现状和存在的问题,提出了拦、挡、排与生物工程相结合的综合防治建议,建议在泥石流防治中充分考虑建筑规划重建、交通规划重建和旅游规划重建3个方面的问题,从而实现泥石流防治同震后规划重建的全面结合。  相似文献   

高产优质胞核两系杂交油菜绵油12的选育     

袁代斌  蒲定福  蒙大庆  李之凡  胥岚  郭子荣  蒋梁材 《亚热带农业研究》2005,1(1):8-10

绵油12系采用阶梯式复合杂交,经多年优良基因重组逐渐积累,集型间、种间、地理及生态远缘之亲本的优良因子于一体的双低胞核两系杂交油菜新品种。它不但具有丰产性突出、增产潜力大、产量高的优点,而且芥酸、硫苷含量都达到国内自用标准,抗倒耐病力强,适应性广,适宜在长江中上游的平丘区种植,也可以在其它类似生态区种植。  相似文献   

Phylogeography of the African common toad,Amietophrynus regularis,based on mitochondrial DNA sequences: inferences regarding the Cape Verde population and biogeographical patterns     

《African Zoology》2013,48(2):291-298

The amphibian Amietophrynus regularis is distributed throughout equatorial Africa, with presumed introduced populations in the Cape Verde archipelago. Portions of the 12S and 16S rRNA mitochondrial regions of 30 specimens from Kenya, Uganda, Niger, Mali, Burkina-Faso, Ghana, Guinea-Bissau and Cape Verde were used to assess genetic diversity and to identify the most probable geographic origin for the introduction of this toad on the latter archipelago. Two lineages with 1.4% genetic divergence between them were identified in western and eastern Africa. All sequences from the different Cape Verde Islands were identical to each other and to the Guinea-Bissau samples, indicating, together with other historical evidences, that an anthropogenic introduction event probably occurred, possibly from Guinea-Bissau, but further work is needed to confirm this. As previously noted, several individuals from previous genetic studies seem to have been misidentified.  相似文献   

西藏牦牛12SrRNA基因全序列测定及系统进化关系          下载免费PDF全文

姜雪鸥  钟金城 《家畜生态学报》2013,34(6):8-12

以西藏11个地区的牦牛类群共计110头为研究对象,采用PCR方法,首次从耳组织总DNA中扩增出了线粒体12SrRNA基因,并进行了序列测定及分析。结果表明,该基因的长962～965bp;序列分析表明12SrRNA基因有较高的进化速率,11个地区的牦牛品种同源性相对较高;对11种类群的牦牛及亚洲水牛、非洲水牛、欧洲野牛和家牛四种牛亚科的12SrRNA基因序列建立NJ和ME分子进化树,结果显示帕里牦牛、斯布牦牛、巴青牦牛、丁青牦牛、江达牦牛、工布江达牦牛、康布牦牛与桑日牦牛的亲缘关系最近。  相似文献   

奶牛S100A12基因克隆、原核表达及体外抗菌活性分析     

曹随忠  雍康  姚学萍  崔亚飞  杨德英  余树民  刘宗平 《中国兽医学报》2013,33(6)

克隆奶牛S100A12基因并在大肠杆菌中高效表达.采用RT-PCR扩增奶牛外周血白细胞中S100A12基因,构建原核表达载体pCold TF-S100A12,在大肠杆菌BL21(DE3)中IPTG诱导表达并纯化.SDS-PAGE和Westernblotting分析显示S100A12基因以融合蛋白形式表达,表达量占菌体总蛋白的46.7％,纯化的重组蛋白(80 mg/L).琼脂扩散法测定重组蛋白对乳腺炎主要致病菌大肠杆菌和金黄色葡萄球菌的抗菌活性.结果显示:重组蛋白对大肠杆菌有抗菌活性,而对金黄色葡萄球菌无抗菌活性.本研究为S100A12蛋白抗体制备及基因功能研究奠定了基础.  相似文献   

Anti-Inflammatory Components of the Starfish Astropecten polyacanthus     

Nguyen Phuong Thao  Nguyen Xuan Cuong  Bui Thi Thuy Luyen  Tran Hong Quang  Tran Thi Hong Hanh  Sohyun Kim  Young-Sang Koh  Nguyen Hoai Nam  Phan Van Kiem  Chau Van Minh  Young Ho Kim 《Marine drugs》2013,11(8):2917-2926

Inflammation is important in biomedical research, because it plays a key role in inflammatory diseases including rheumatoid arthritis and other forms of arthritis, diabetes, heart disease, irritable bowel syndrome, Alzheimer’s disease, Parkinson’s disease, allergies, asthma, and even cancer. In the present study, we describe the inhibitory effect of crude extracts and steroids isolated from the starfish Astropecten polyacanthus on pro-inflammatory cytokine (Interleukin-12 (IL-12) p40, interleukin-6 (IL-6), and tumor necrosis factor α (TNF-α)) production in lipopolysaccharide (LPS)-stimulated bone marrow-derived dendritic cells (BMDCs). Among those tested, compounds 5 and 7 showed potent inhibitory effects on the production of all three pro-inflammatory cytokines with IC₅₀ values ranging from 1.82 ± 0.11 to 7.00 ± 0.16 μM. Potent inhibitory activities were also observed for compound 1 on the production of IL-12 p40 and IL-6 with values of 3.96 ± 0.12 and 4.07 ± 0.13 μM, respectively, and for compounds 3 and 4 on the production of IL-12 p40 with values of 6.55 ± 0.18 and 5.06 ± 0.16 μM, respectively. Moreover, compounds 2 (IC₅₀ = 34.86 ± 0.31 μM) and 6 (IC₅₀ = 79.05 ± 2.05 μM) exhibited moderate inhibitory effects on the production of IL-12 p40, whereas compounds 3 (IC₅₀ = 22.80 ± 0.21 μM) and 4 (IC₅₀ = 16.73 ± 0.25 μM) moderately inhibited the production of TNF-α and IL-6, respectively.  相似文献   

Treatment and outcome of chronic septic tenosynovitis in three horses     

K.T. Gibson  H.M. Burbidge 《New Zealand veterinary journal》2013,61(6):244-247

Three horses were presented for treatment of chronic infections of the digital flexor tendon sheath. Clinical signs included severe lameness, and heat, pain and swelling of the digital flexor tendon sheath. The horses were treated with surgical lavage of the tendon sheath, systemic and local antibiotics, and analgesics. In each case, resolution of the lameness occurred over weeks to months. Only one horse returned to athletic activity, while the other two became comfortable at pasture. Response to treatment in cases of chronic tenosynovitis may not be as rapid or complete as that reported for acute tendon sheath infections.  相似文献   

HPLC法检测复合维生素片中叶酸和维生素B_(12)的含量     

秦瑜丽 《安徽农业科学》2013,41(5):2248-2249,2260

[目的]建立应用高效液相法测定复合维生素片中叶酸和维生素B12含量的方法。[方法]色谱柱用菲罗门lunaC18(4.6×250 mm,5μm),流动相为甲醇-0.028 mol/L磷酸氢二钠水溶液(用磷酸调pH到3.5)(21∶79),流速1.0 ml/min,检测波长为361 nm,进样量为20μl,柱温为25℃。[结果]维生素B12在6.65～66.50 ng范围内呈现良好的线性关系,回归方程是y=0.495 1x+1.342 8(R2=0.999 4,n=6),平均回收率为96.83%,RSD为0.82%(n=6)。叶酸在80～800 ng范围内呈现良好的线性关系,回归方程是y=0.021 1 x+0.661 1(R2=0.998 8,n=6),平均回收率为95.56%,RSD为1.54%(n=6)。[结论]高效液相色谱法灵敏度高,操作简便,重现性好,结果准确,可以用于复合维生素片中叶酸和维生素B12的含量测定。  相似文献   

津田弯孢C12铅耐受性研究     

张收霞  楚文卉  杨超 《西北农林科技大学学报(自然科学版)》2019,47(12):115-122

【目的】测定津田弯孢C12(Curvularia tsudae C12)对重金属铅的耐受性,并分析相关的理化机制,为该菌在重金属环境污染治理中的应用提供理论基础,并丰富真菌重金属抗性机制理论。【方法】采用固、液两种培养方法,分别检测不同Pb~(2+)质量浓度(0,200,400,800,1 200,1 600,2 000 mg/L)胁迫下津田弯孢C12的生长状况,并依据菌丝体干质量计算铅对该菌的半效应浓度(EC_(50)),明确该菌对铅的耐受性;测定不同Pb~(2+)质量浓度胁迫下津田弯孢C12培养液的pH值和有机酸含量、菌丝体中的谷胱甘肽(GSH)和丙二醛(MDA)含量,初步分析津田弯孢C12可能的铅耐受性机制。【结果】津田弯孢C12在所测Pb~(2+)质量浓度下均能生长,但相同Pb~(2+)质量浓度下液体培养的菌丝体干质量和EC_(50)(990.8 mg/L)均显著高于固体培养(P0.05);铅胁迫下(200～2 000 mg/L),津田弯孢C12菌落直径、菌丝体干质量和培养液pH值均显著(P0.05)低于不加铅(0 mg/L)的对照,而培养液中4种有机酸含量和有机酸总量及菌丝体内GSH含量均高于不加铅的对照,且草酸和柠檬酸含量显著(P0.05)高于酒石酸和苹果酸。随培养基中Pb~(2+)质量浓度的增加,菌落直径和菌丝体干质量呈逐渐降低的趋势;草酸含量先升高后稳定,在Pb~(2+)质量浓度800～2 000 mg/L时达到最大;酒石酸、苹果酸、柠檬酸的含量和有机酸总量都呈先升高后降低并趋于平稳,在Pb~(2+)质量浓度400～800 mg/L时达到最大值;培养液pH则呈先降低后升高并稳定的趋势,Pb~(2+)质量浓度为800 mg/L时培养液pH值最低;菌丝体内GSH含量逐渐上升,低Pb~(2+)质量浓度(200～1 200 mg/L)下显著低于(P0.05)高Pb~(2+)质量浓度(1 600～2 000 mg/L),而MDA含量则是先增加后降低再升高,但各个Pb~(2+)质量浓度下均无显著变化(P0.05)。【结论】津田弯孢C12对重金属铅具有较高的耐受性,其在液体振荡培养条件下的生长状况和铅耐受性均明显优于固体培养,改变形态以增加吸附表面积、分泌黑色素、积累GSH和有机酸,尤其是草酸和柠檬酸,可能是该菌减轻重金属铅毒害、具有较高铅耐受性的潜在机制。  相似文献