玉米新品种兴单15高产栽培技术

该品种幼苗健壮，根系发达，抗旱、抗倒伏能力强，抗玉米大斑病和玉米丝黑穗病。株高270～290cm，穗位高110cm，果穗圆柱形，穗长26．5cm，穗粗4．8cm，穗行数14～16行，行粒数48粒左右，百粒重38g，穗轴粉红色。     

磷在棕壤中淋溶迁移特征研究

采用室内土柱淋溶模拟试验，研究相当于一年降雨条件下磷肥在棕壤土垂直方向上的淋溶迁移特征及鸡粪、秸秆对磷素迁移转化的影响。结果表明：土壤施肥量与速效磷、迟效态磷增加量呈极显著正相关。相关系数分别是0．99141。，0．99774；水溶性磷、Al—P与土壤速效磷相关性最好，相关系数分别达0．972和0．926，2500mg／kg鸡粪与25mg／kg磷肥配施能降低磷淋溶率，并能极显著提高土壤中速效磷的增加量，相当于单施50mg／kg的磷肥；秸秆与磷肥配合施用在短期内对土壤磷素的有效性影响不大，但可以减少磷素向下层迁移。     

抗旱保水剂在果园中的应用效应研究

利用大田试验的方法研究了KD—1型抗旱保水剂在苹果树上的使用效应。结果表明,每棵果树使用抗旱保水剂25～100g,可使土壤含水量平均增加2.01%～2.25%,土壤容重降低0.093g/cm3,大于0.25mm的团粒结构增加10.28%,果树新梢长度和粗度分别增加3.66cm和0.04cm,单果重平均增加23g,差异明显。但使用保水剂对土壤酸碱度和果实含糖量的影响作用不明显。     

黑木耳菌糠栽培黑木耳的研究

以5％、10％、15％、20％、25％、30％、35％、40％、45％、50％黑木耳茵糠代替木屑配制培养基栽培黑木耳,与未加菌糠的常规培养基进行产量、质量比较试验。结果表明：黑木耳菌糠代替部分木屑袋栽黑木耳是可行的,用30％的茵糠替代木屑生产黑木耳为最适宜配比。配方为木屑47％、茵糠30％、麸皮20％、石膏1％、玉米粉1％、豆粉1％,生产出的黑木耳产量高、质量好。     

Antipeptide antibodies recognizing plasmin sensitive sites in bovine beta-casein sequence

To investigate plasmin activity in cheese, we produced antibodies to bovine beta-casein with controlled specificity, suitable as markers of the integrity of the major bonds involved in its initial breakdown. Sixteen rabbits were immunized with synthetic substitutes for six plasmin-sensitive peptides. Antisera raised to the peptides (f20-39), (f40-56), (f94-113), (f184-202), and (f193-209) recognized beta-casein in ACP-ELISA, Western-blot, and biosensor assays. Casein in vitro hydrolysis by plasmin or chymosin reduced the detection of these determinants in ACP-ELISA, in agreement with the enzymatic sensitivity of bonds included within the binding sites, or in their neighborhood. Antiserum to (f20-39) in particular allowed the specific detection of plasmin cleavage at the bond generating gamma1-CN. Antisera to C-terminus preferentially detected the cleavage by chymosin. Immunoassays using these antibodies would allow in situ monitoring of significant proteolysis events without bias originated in the secondary degradation of the released peptides.     

水分淋洗下菜园土壤各形态锌的迁移转化特征

采用室内模拟降雨淋溶土柱的方法，研究了经过1年降雨的淋溶后，菜园土壤垂直方向上各形态锌的迁移转化规律。结果表明：锌的大多数形态很难随水分运动发生迁移，～年的降雨至多能使占总量0．57％的水溶态锌发生淋溶损失。水分淋洗和施磷锌平均能使分别占总量3％和4％的难溶态RES—Zn和OX-Zn向易被植物利用的EX—Zn、CABS—Zn和OM—Zn形态转化。随施锌量的增加，土壤锌的有效性指数增加30％～78％．有效锌总量增加3．12～10．07mg／kg。当施磷50mg／kg时，土壤Zn的有效性指数增加3％～28％，有效锌总量增加0．04～0．28mg／kg，磷锌在土壤中表现为协同作用。     

喷使波尔多液对苹果叶片矿质元素含量的影响

含铜杀菌剂 (波尔多液、硫酸铜 )是果园常用农药 ,由于其效果稳定且成本低 ,因而使用频率高年限长 ,导致果园土壤生态系统中的铜逐年累积[1 ,2 ] ,有关土壤铜含量过高使作物生长代谢受到毒害的研究已有较多报道[3 - 6] ,但喷使含铜杀菌剂(波尔多液、硫酸铜 )对果树生长和代谢的影响未见报道。本研究通过大田喷使试验来探讨不同比例的波尔多液及CuS0 4 、Fe -EDTA等处理对苹果叶片矿质元素含量影响的特征。1　材料与方法1 .1　试验处理试验地点设在肥城市石横镇新胜村和泰安市道朗镇鱼池村树龄分别为 5a及 3a、未喷使过含铜农药的红富士苹…     

Drosophila CENH3 is sufficient for centromere formation

CENH3 is a centromere-specific histone H3 variant essential for kinetochore assembly. Despite its central role in centromere function, there has been no conclusive evidence supporting CENH3 as sufficient to determine centromere identity. To address this question, we artificially targeted Drosophila CENH3 (CENP-A/CID) as a CID-GFP-LacI fusion protein to stably integrated lac operator (lacO) arrays. This ectopic CID focus assembles a functional kinetochore and directs incorporation of CID molecules without the LacI-anchor, providing evidence for the self-propagation of the epigenetic mark. CID-GFP-LacI-bound extrachromosomal lacO plasmids can assemble kinetochore proteins and bind microtubules, resulting in their stable transmission for several cell generations even after eliminating CID-GFP-LacI. We conclude that CID is both necessary and sufficient to serve as an epigenetic centromere mark and nucleate heritable centromere function.     

Differences between tight and loose cultures: a 33-nation study

With data from 33 nations, we illustrate the differences between cultures that are tight (have many strong norms and a low tolerance of deviant behavior) versus loose (have weak social norms and a high tolerance of deviant behavior). Tightness-looseness is part of a complex, loosely integrated multilevel system that comprises distal ecological and historical threats (e.g., high population density, resource scarcity, a history of territorial conflict, and disease and environmental threats), broad versus narrow socialization in societal institutions (e.g., autocracy, media regulations), the strength of everyday recurring situations, and micro-level psychological affordances (e.g., prevention self-guides, high regulatory strength, need for structure). This research advances knowledge that can foster cross-cultural understanding in a world of increasing global interdependence and has implications for modeling cultural change.