35%吡唑醚菌酯悬浮剂的研制

通过对润湿分散剂、增稠剂、防冻剂、抗熔剂、消泡剂等品种及用量的筛选,制备35%吡唑醚菌酯悬浮剂。最佳配方为吡唑醚菌酯原药35%,润湿分散剂木质素磺酸钠0.5%、2208 2%、SP-SC 390NS 2.5%,防冻剂4%,增稠剂黄原胶0.15%,防腐剂苯甲酸钠0.2%,抗熔剂2%,消泡剂0.1%,去离子水补足100%。该配方各项性能指标均符合悬浮剂要求。     

20%异噁唑草酮悬浮剂的研制

[目的]研制20%异噁唑草酮悬浮剂的最佳配方。[方法]采用流点法初步筛选20%异噁唑草酮悬浮剂的润湿分散剂,在此基础上,使用激光粒度仪测定粒径的方法对分散剂进行进一步的筛选。[结果]综合对比2种方法的筛选结果,优选出20%异噁唑草酮悬浮剂的润湿分散剂为SP-SC3266。实验结果显示,SP-SC3266冷热贮藏稳定。[结论]通过对润湿分散剂、增稠剂、抗冻剂和消泡剂的筛选,确定20%异噁唑草酮悬浮剂的最佳配方:原药20%、润湿分散剂SP-SC3266 4.00%、黏度调节剂黄原胶0.20%、防冻剂丙二醇4.00%和去离子水71.30%。该悬浮剂的悬浮率达94.30%以上,且冷热贮藏稳定。     

7%吡虫啉·咯菌腈·嘧菌酯种子处理悬浮剂配方研制

开发7%吡虫啉·咯菌腈·嘧菌酯种子处理悬浮剂的配方。采用湿法研磨工艺筛选适宜的润湿分散剂、增稠剂、防冻剂、pH调节剂、成膜剂等助剂种类及其用量,确定了7%吡虫啉·咯菌腈·嘧菌酯种子处理悬浮剂优选配方：吡虫啉6%(折百)、咯菌腈0.2%(折百)、嘧菌酯0.8%(折百),润湿分散剂烷基醇聚氧乙烯醚W-600 1%、乙氧基多聚芳基酚醚磷酸酯铵盐SC 2%、多聚芳基醚硫酸酯FD 3%,防冻剂乙二醇5%,pH调节剂柠檬酸0.2%,成膜剂KMM-01 3%,警戒色R2002SS 15%,消泡剂630 0.5%,防腐剂卡松0.2%,增稠剂黄原胶0.2%、硅酸镁铝2%,珠光粉161 8%,抗划痕蜡乳液SC-09 5%,去离子水补足至100%。该制剂配方悬浮性优,储存稳定性好,各项技术指标均符合种子处理悬浮剂的标准要求。     

15%多杀霉素·螺虫乙酯悬浮剂的研制

制备15%多杀霉素·螺虫乙酯悬浮剂。通过对润湿分散剂、增稠剂和防冻剂进行筛选,确定了15%多杀菌素·螺虫乙酯悬浮剂的优选配方：多杀霉素5%,螺虫乙酯10%,分散剂Agrilan 788 2%,润湿分散剂JR-P 2%、Ethylan NS-500LQ 2%,增稠剂黄原胶0.1%、硅酸镁铝2.0%,防冻剂丙二醇5%,消泡剂1522 0.3%,防腐剂卡松0.2%,去离子水补足100%。制备的产品悬浮率≥95%,平均粒径≤3.4μm,起泡时间短,自动分散性能好,热储稳定性好,各项指标均符合悬浮剂的标准。     

35%氟环唑·嘧菌酯悬浮剂的研制及生物活性评价

[目的]制备35%氟环唑·嘧菌酯悬浮剂,评价悬浮剂的生物活性。[方法]采用湿法砂磨工艺制备35%氟环唑·嘧菌酯悬浮剂,对配方中润湿分散剂、增稠剂、防冻剂、消泡剂和防腐剂等助剂进行筛选,对该悬浮剂的悬浮率、分散性、热贮稳定性等性能指标进行测试。采用菌丝生长速率法测定悬浮剂对水稻纹枯病病菌的毒力,评价悬浮剂的生物活性。[结果]35%氟环唑·嘧菌酯悬浮剂的最佳配方为氟环唑15%,嘧菌酯20%,Emulson AG TRST 4%,TERSPERSE 2500 2%,硅酸镁铝0.5%,黄原胶0.15%,乙二醇5%,防腐剂S30 0.5%,消泡剂AF1501 0.5%,水补足至100%。35%氟环唑·嘧菌酯悬浮剂对水稻纹枯病病菌的生物活性高于12.5%氟环唑悬浮剂。[结论]35%氟环唑·嘧菌酯悬浮剂的各项性能指标均符合悬浮剂的标准要求,对防治水稻纹枯病有明显的增效作用。     

30%烯肟菌酯·戊唑醇悬浮剂的研制

采用湿式超微粉碎加工工艺,以悬浮率(≥90%)、筛析、热贮[(54±2)℃、14 d]稳定性为标准,通过对不同润湿分散剂、增稠剂、防冻剂、消泡剂、防腐剂的筛选,得到30%烯肟菌酯·戊唑醇悬浮剂的最佳配方。最佳配方为烯肟菌酯7%、戊唑醇23%、聚羧酸盐润湿分散剂1%、润湿分散剂(SP-28F)1.5%、分散剂(LM)3%、消泡剂0.5%、黄原胶0.05%、乙二醇2%、甲醛0.15%、水补至100%。该产品悬浮率≥90%,分散性良好,冷热贮稳定性合格。     

15％甲维·吡虫啉悬浮剂的研制

通过对润湿分散剂、防冻剂、增稠剂的筛选,确定了15％甲维·吡虫啉悬浮剂优惠配方：78．2％甲维盐原药6．5％,95．6％吡虫啉原药10．6％,润湿分散剂GY—SC853．0％,防冻剂尿素4．0％,增稠剂黄原胶0．2％、硅酸镁铝0．5％,消泡剂GY—X600．2％,水75．0％。该优惠配方制备的悬浮剂低温和热贮后物理化学性质稳定。     

10%甲氨基阿维菌素苯甲酸盐悬浮剂配方开发

研制了性能稳定的10%甲氨基阿维菌素苯甲酸盐悬浮剂。通过对润湿分散剂、防冻剂、增稠剂的筛选,确定了10%甲氨基阿维菌素苯甲酸盐悬浮剂优惠配方。用TURBISCAN LAB分散稳定性分析仪对甲氨基阿维菌素苯甲酸盐悬浮剂的稳定性进行了分析研究。优惠配方组成:78.2%甲氨基阿维菌素苯甲酸盐原药质量分数为12.8%,润湿分散剂GY-SC85质量分数为5.0%,防冻剂尿素质量分数为4.0%,增稠剂黄原胶质量分数为0.2%,硅酸镁铝质量分数为0.8%,消泡剂GY-X60质量分数为0.2%,水的质量分数为77.0%。该优惠配方具有较好的适应硬水的性能,制成的制剂具有较好的分散稳定性。     

36%春雷霉素·喹啉铜悬浮剂的配方研制

采用湿法砂磨工艺制备36%春雷霉素·喹啉铜悬浮剂，对其配方中的润湿分散剂、增稠剂、p H调节剂和防冻剂进行了筛选，确定最佳配方为春雷霉素3%、喹啉铜33%、SP-SC3275 4%、润湿分散剂A 3%、润湿分散剂B 1.5%、乙二醇5%、一水柠檬酸1.4%、硅酸镁铝0.5%、黄原胶0.15%、防腐剂S30 0.15%、SAG1522 0.3%、去离子水补至100%。试验结果表明：该产品流动性好、悬浮率高、稳定性好、田间使用效果良好，各项指标符合悬浮剂的要求。     

40%氟环唑·三环唑悬浮剂的制备

[目的]制备40%氟环唑·三环唑悬浮剂。[方法]采用湿法砂磨制备工艺,对其配方中的润湿分散剂、增稠剂及防冻剂进行了筛选。[结果]最佳配方为氟环唑10%,三环唑30%,YUS-SXC 0.5%,Atlas G 5000 1.5%,SP-SC 30603.5%,润湿分散剂A 1%,丙二醇5%,硅酸镁铝0.5%,黄原胶0.15%,苯甲酸钠0.3%,Proxel GXL 0.08%,SAG 15220.4%,去离子水补至100%。[结论]该产品流动性好、悬浮率高、稳定性好、各项指标符合悬浮剂的要求。     

冷、热贮条件下农药悬浮剂物理稳定性影响因子的变化规律初步研究

初步研究了农药悬浮剂冷、热贮不同时间后的粒子大小、粒度分布、黏度及悬浮率的变化规律。试验结果表明,30%甲硫.戊唑醇悬浮剂和40%戊唑.多菌灵悬浮剂热贮后中位径均变化不大,粒子的跨距、黏度均呈增大趋势,而悬浮率均呈显著降低趋势;冷贮对粒子大小、粒径分布及黏度的影响均不大,悬浮率均呈降低趋势,但并不明显。初步认为,经冷、热贮后农药悬浮剂物理稳定性影响因子有相似的变化规律。     

甲基硫菌灵悬浮剂的稳定性

分析了分散助剂、颗粒细度、黏度、触变剂、加工工艺对甲基硫菌灵悬浮剂稳定性的影响,确定了甲基硫菌灵悬浮剂的优化配方和生产工艺.甲基硫菌灵悬浮剂最佳生产配方如下:甲基硫菌灵原药36%,分散剂5%(十二烷基苯磺酸钙与XP-203的质量比1:2)、黏度调节剂(黄原胶)0.3%、防冻剂(乙二醇)5%、触变剂(硅酸镁铝)0.6%、消泡剂(二甲基硅油)2‰、电解质(0.67 mol/L磷酸)l‰、密度调节剂(蔗糖)3%、余量为水.     

纹霉清及其复配剂防治水稻纹枯病试验研究

研究了纹霉甭及其复配剂防治水稻纹枯病的防治效果。结果表明：４０％纹霉清ＷＰ、２０％纹利ＳＣ和１２．５％纹在后的防效分别为７６．６５％、９１．１２％,总体防盗和均在６０％以上,适宜剂量为７５ｍｌ／６６７ｍ＾２,其防效与井冈霉素的防效相当。     

Fracture resistance of roots obturated with a novel calcium silicate-based endodontic sealer (BioRoot RCS)

The aim of this ex vivo study was to evaluate the vertical-fracture resistance of roots obturated with a newly developed tricalcium silicate cement (BioRoot RCS; Septodont, Saint Maur Des Fosses, France) using cold lateral compaction technique (LC) or matched-taper single-cone gutta-percha technique (SC). Decoronated 82 single-rooted mandibular premolars were chemo-mechanically prepared and then randomly divided into 6 experimental groups (n = 12) and 2 control groups (n = 5): Group 1 iRoot SP-LC; Group 2 iRoot SP-SC; Group 3 MTA Fillapex-LC; Group 4 MTA Fillapex-SC; Group 5 BioRoot RCS-LC and Group 6 BioRoot RCS-SC. In the positive-control group, roots were instrumented but not filled, and in the negative-control group, roots were neither instrumented nor filled. All samples were incubated for two weeks and then subjected to vertical loading force (1 mm/min) until fracture. The force required to fracture each specimen were determined, and the data were statistically analyzed. The highest significant fracture resistance was recorded for the iRoot SP-LC, iRoot SP-SC, BioRoot RCS-LC, and BioRoot RCS-SC groups, with no significant difference among them (p > 0.05) when compared with the positive-control group (p < 0.05), whereas the lowest significant values were observed in the MTA Fillapex-LC and MTA Fillapex-SC groups (p < 0.05). The vertical fracture resistance of roots obturated with BioRoot RCS and iRoot SP sealers using either LC or SC technique was found to be similar to that of intact teeth. BioRoot RCS, newly developed tricalcium silicate cement, might have the potential to reinforce the instrumented teeth against vertical root fracture.     

30%唑醚·戊唑醇悬浮剂的研制及其对玉米大斑病的防效

通过流点法确定分散剂种类,利用正交试验法优化配方,采用湿法研磨工艺制备30%唑醚·戊唑醇悬浮剂样品,并开展田间防治玉米大斑病的药效试验。30%唑醚·戊唑醇悬浮剂的优化配方为:10%吡唑醚菌酯、20%戊唑醇、2.5%润湿分散剂Atlax G-5000、0.12%黄原胶、4%丙三醇,水补足至100%。所制30%唑醚·戊唑醇悬浮剂在有效成分用量为180,210 g/hm~2时,对玉米大斑病防效分别为85.03%和88.80%。30%唑醚·戊唑醇悬浮剂可有效防治玉米大斑病,具有较好的应用价值。     

悬浮剂粒径分布及研磨工艺研究

悬浮剂制备中普遍使用砂磨机作为研磨设备。通过改变研磨介质的直径、珠料比以及砂磨时间等工艺参数,使用激光粒度仪测量了不同工艺参数下制备的百菌清及甲氨基阿维菌素苯甲酸盐悬浮剂的粒径分布,研究了不同工艺参数对悬浮剂粒径分布的影响。试验结果表明,砂磨机中使用锆珠作为砂磨介质时,选用粒径较小的锆珠、适当的珠料比和足够的砂磨时间均可以得到粒径分布较窄的悬浮剂产品。     

45%磺草酮·莠去津悬浮剂的配方研制

采用湿法超微粉碎法制备45%磺草酮·莠去津悬浮剂,通过试验筛选最终确定了制剂的最佳配方:磺草酮原药10.0%、莠去津原药35.0%、GY-DX01 4.0%、GY-WS03 1.0%、黄原胶0.1%、硅酸镁铝0.3%、乙二醇4.0%、防腐剂GY-B15 0.2%、消泡剂SFE-3168 0.5%、柠檬酸1.0%、水补足至100%。实验结果表明:该配方制备的悬浮剂平均粒径<5μm,悬浮率95%以上,其它各项指标均达到悬浮剂的要求。     

几种三氮苯类除草剂的除草效果比较及对作物的安全性评价

通过室内生物测定，研究了几种三氮苯类除草剂对几种杂草防治效果和对作物的安全性。结果表明，40％莠去津悬浮剂O．04ga．i．／hm^2对牵牛防治效果最好；50％赛克津可湿性粉剂O．04ga．i．／hm^2对稗草和茼麻防治效果最好：50％氰草津可湿性粉剂200g／667m。对玉米和棉花安全性较高．在土壤处理时50％阿灭净可湿性粉剂200g/亩对花生、大豆有较高安全性。     

聚羧酸盐分散剂对苯醚甲环唑悬浮剂稳定性能影响

结合聚羧酸盐分散剂D1001的作用机理,考察聚羧酸盐分散剂不同用量对苯醚甲环唑悬浮剂粒径、粒度跨度、黏度、沉降体积和悬浮率等稳定性能的影响。结果表明:当聚羧酸盐分散剂D1001用量为4%时,苯醚甲环唑悬浮体系的粒径、跨度、黏度和沉降体积最小,而悬浮率保持较高水平,苯醚甲环唑悬浮体系具有良好的稳定性能。     

Waste E-glass particles used in cementitious mixtures

The properties of concretes containing various waste E-glass particle contents were investigated in this study. Waste E-glass particles were obtained from electronic grade glass yarn scrap by grinding to small particle size. The size distribution of cylindrical glass particle was from 38 to 300 μm and about 40% of E-glass particle was less than 150 μm. The E-glass mainly consists of SiO₂, Al₂O₃, CaO and MgO, and is indicated as amorphous by X-ray diffraction (XRD) technique. Compressive strength and resistance of sulfate attack and chloride ion penetration were significantly improved by utilizing proper amount of waste E-glass in concrete. The compressive strength of specimen with 40 wt.% E-glass content was 17%, 27% and 43% higher than that of control specimen at age of 28, 91 and 365 days, respectively. E-glass can be used in concrete as cementitious material as well as inert filler, which depending upon the particle size, and the dividing size appears to be 75 μm. The workability decreased as the glass content increased due to reduction of fineness modulus, and the addition of high-range water reducers was needed to obtain a uniform mix. Little difference was observed in ASR testing results between control and E-glass specimens. Based on the properties of hardened concrete, optimum E-glass content was found to be 40-50 wt.%.