歧化松香酸钾皂对生产丁苯橡胶的影响

研究了以歧化松香酸钾皂作为主乳化剂时，对低温乳液聚合丁苯橡胶的聚合及胶乳稳定性的影响。用紫外导数光谱法定量分析了歧化松香酸钾皂的成分，探讨了歧化松香酸钾皂与胶乳稳定性的关系。结果表明，歧化松香酸钾皂中松香酸钾、新松香酸钾、左旋海松酸钾等含量高是影响丁苯橡胶聚合速率下降的主要原因，歧化松香酸钾皂皂化程度不够、pH值不稳定是影响丁苯胶乳稳定性的主要原因，并提出作为乳液聚合丁苯橡胶的乳化剂，歧化松香酸钾皂中含共轭双键结构的松香酸钾皂质量分数应为0．5％～1．5％，另外对歧化松香酸钾皂进行分析，以放置不分层为宜。     

KTiOPO4晶体条状波导的制备和研究

报道了以离子交换法制备KTiOPO_4晶体条状波导的结果,成功地获得了1.3μm,0.73μm和0.6328μm单模波导,测量了其光强分布及对1.3μm激光衰减系数。     

Nitrogen and potassium requirement of pineapple in relation to irrigation in Nigeria

The investigation studied the effect of fertilization with four nitrogen levels (0, 100, 150 and 200 kg/ha), four potassium levels (0, 100, 150 and 200 kg/ha) and four irrigation treatments (0, 3, 7 and 14-day interval) on the growth and yield of smooth Cayenne pineapples. Increasing irrigation frequency increased growth parameters of number of leaves, D-leaf length and days to 50% flowering. Fruit weight was highest at N = 150 kg/ha, K = 200 kg/ ha and irrigation once a week. Higher N levels (beyond 150 kg/ha) applied after the plant crop has been harvested did not further enhance yields of the ratoon crop. For K = 200 kg/ha potential and harvested yields were reduced in all irrigation treatments when N > 150 kg/ha.     

低温烧结Ph(Zn_(1/3)Nb_(2/3)O_3基复相陶瓷中的两相共存与介电性能

分别采用氟化物和硼硅玻璃为助烧剂制备了低温烧结PZN基复相陶瓷，并借助介电温度特性研究了复相陶瓷中的两相共存与助烧剂的关系．结果表明，添加剂引入的晶格缺陷对复相陶瓷中的两相共存有显著影响,LiF助烧剂因引起晶格氧空位促进两相固溶化，而MgF2和硼硅玻璃助烧的PZN复相陶瓷可保持两相共存．以硼硅玻璃为助烧剂获得了低温烧结、具有X7R温度稳定特性的PZN基复相陶瓷．     

铁电晶体铌酸钾锂的拉曼和FT—IR光谱

用提拉法生长了完整透明的铁电铌酸钾锂晶体 .利用X 射线荧光光谱法测量分析了晶体的组成 .采用X 射线测量了晶体的结构 .用结构完整、组分均匀 ,尺寸为 6× 6× 7(a×b×c)mm3 的晶体样品 ,测量了晶体的拉曼光谱和红外折射光谱 .与其它钨青铜类晶体的晶格振动光谱进行比较 ,铌酸钾锂晶体中对称弯曲振动模式v5在拉曼光谱中分裂为 3个拉曼峰 ,反对称伸缩振动模式v3 和反对称弯曲振动模式v4在红外反射光谱中所对应的峰被加宽 ,v4被轻微分裂 .这表明晶体中这位于C格位的Li离子对晶体中铌氧八面体的拉曼光谱和红外反射光谱有较大的影响     

文301井钾基聚磺饱和盐水钻井液技术

文301井为评价井．位于东渍凹陷文西断层下降盘文301断块．完钻井深为4000m．穿过S1段盐层、S2段上部盐层、S3^2段盐层、S3^3段盐层等多套盐膏层．累计厚度达998m．且盐间物性差别很大．泥膏盐较多，断层多．易盐溶、坍塌、缩径．地层条件相当复杂。针对纯度低、盐层薄的Sl段盐层．采用淡水复合胶液钻井液．针对埋藏深、厚度大的S3^2段、S3^3段破碎泥膏盐混杂结合体．配制钾基聚磺饱和盐水钻井液．从而抑制了盐膏泥层水化膨胀，防止了因层间膨胀性不一致而引起的地层掉块、坍塌．保证了井壁稳定，井径规则．满足了合长盐层段深井优质、安全、快速施工的要求。     

喷施硝酸稀土对甘蔗钾素吸收、运转和分配的影响

应用同位素示踪技术和放射自显影技术研究了甘蔗苗期和分蘖期喷施300mg/L硝酸稀土对钾素吸收、运转和分配的影响。结果表明,稀土元素处理能促进甘蔗根部及叶片对钾素(86Rb)的吸收和向外运转以及在生长旺盛部位的累积。生长盛期喷施300mg/L硝酸稀土也能显著提高甘蔗叶片全钾量。     

利用溶剂分离氯化钾和氯化钠的新工艺探索

文章考察了乙醇加入量、温度等因素对氯化钾和氯化钠单独存在及二者共存时在水溶液中的溶解度的影响,研究结果表明:在不同温度下加入乙醇可使氯化钾和氯化钠在水中的溶解度均降低,但其降低的幅度不同;两种盐类在水中溶解度的差异将随温度的升高而减小。在此基础上,文章提出了利用溶剂分离氯化钾和氯化钠的新工艺初步方案。     

Microhardness studies in gel-grown ADP and KDP single crystals

Microhardness studies were carried out on (100) faces of gel-grown ADP and KDP single crystals. Slip lines were observed on (100) face of ADP crystal at the corners of the impressions. Microcracks around the indentation were found on (100) face of KDP crystal from 10g load which spread out as the load increased. Vickers hardness numberH _v decreased with increase in load. ΔH _v at 50g load for solution-grown crystals and gel-grown crystals (present case) was determined. Work hardening indexn for both ADP and KDP crystals was less than 2 showing soft-material characteristics. Using Wooster’s empirical relation, values of C₁₁ from hardness were calculated and found to be close to the reported ones. The work was done under a research project sanctioned by the Council of Scientific and Industrial Research (CSIR), New Delhi.     

Conventional and Eccentric Uses of Crystallographic Databases in Practical Materials Identification Problems

The crystallographic databases are powerful and cost-effective tools for solving materials identification problems, both individually and in combination. Examples of the conventional and unconventional use of the databases in solving practical problems involving organic, coordination, and inorganic compounds are provided. The creation and use of fully-relational versions of the Powder Diffraction File and NIST Crystal Data are described.