苏云金杆菌的急性毒性及致敏实验观察

按照《农药登记毒理学试验方法》(GB15670-1995),对生物衣药苏云金杆菌原药进行急性经口、经皮、吸入毒性试验,眼睛刺激试验和致敏试验。该受试物对雄、雌性大鼠急性经口LD50为3830、3160 mg／kg;对雄、雌性大鼠急性经皮LD50(4 h)>2150 mg／kg;对雄、雌性大鼠急性吸入LC50(2 h)>5 000 mg／m3;对实验兔急性眼平均刺激指数为0;对豚鼠致敏试验,致敏率为0％。因此,该受试物急性经口属微毒性、急性经皮属低毒性、急性吸入属微毒性,眼睛刺激试验为无刺激性,致敏试验属Ⅰ级弱致敏物。     

绿僵菌的急性毒性及致敏实验观察

目的　研究生物农药绿僵菌 (Metarhizium)原药急性经口、经皮、吸入毒性及眼睛刺激和致敏率。方法　按照《农药登记毒理学试验方法》(GB15 6 70 1995 )进行操作。结果　该受试物对雌、雄性大鼠急性经口LD50 >5 0 0 0mg/kg ;对雌、雄性大鼠急性经皮LD5 0 (4h) >2 15 0mg/kg ;对雄、雌性大鼠急性吸入LC50 (2h) >5 0 0 0mg/m3 ;对实验兔急性眼平均刺激指数为 0 ;对豚鼠致敏率为 0 %。结论　该受试物急性经口属微毒性、急性经皮属低毒性、急性吸入属微毒性 ,眼睛刺激试验为无刺激性 ,致敏试验属Ⅰ级弱致敏物     

三十烷醇原药急性毒性测定

目的:检测三十烷醇原药的急性经口、经皮毒性和对眼、皮肤的刺激性以及对皮肤的致敏性,为三十烷醇原药的安全使用提供毒理学依据.方法:急性经口、经皮毒性试验,眼、皮肤刺激试验以及皮肤致敏试验均按中华人民共和国国家标准<农药登记毒理学试验方法>(GB15670-1995)的规定方法进行.结果:三十烷醇原药对雄性大鼠和雌性大鼠的经口LD50均>5 000 mg/kg,经皮LD50均>2 000 mg/kg;对大耳白兔眼刺激积分指数为4,眼刺激平均指数48 h后为0,对豚鼠皮肤刺激积分为0,对豚鼠致敏率为0,结论:三十烷醇原药急性经口、经皮毒性为低毒,且属于弱致敏物,对人畜较为安全.     

国产97%吡唑醚菌酯的急性毒性研究

目的通过农药六项急性毒性试验观察国产97%吡唑醚菌酯的急性毒性。方法采用霍恩氏法进行大鼠急性经口毒性试验,观察动物死亡情况,计算国产97%吡唑醚菌酯急性经口LD_(50);采用限量法进行急性经皮吸收和呼吸道吸入试验,观察死亡情况,计算其急性经皮LD_(50)与吸入LC_(50);通过兔皮肤刺激性试验和眼刺激性试验,考察其皮肤刺激性及眼刺激性;通过豚鼠皮肤变态反应试验,观察是否有致敏性。结果国产97%吡唑醚菌酯对雌、雄大鼠急性经口LD_(50)均为681 mg/kg;急性经皮LD_(50)均大于2 000 mg/kg;急性吸入LC_(50)均大于5 000 mg/m~3;对家兔急性皮肤刺激性为轻刺激性;不冲洗条件下对家兔急性眼刺激为重度刺激性,冲洗条件下为无刺激性;对豚鼠致敏率为5%,属弱致敏类。结论国产97%吡唑醚菌酯属于低毒,皮肤轻刺激性,冲洗条件下无眼刺激性,属弱致敏类的农药。     

烟嘧磺隆原药的急性毒性评价

目的:评价烟嘧磺隆原药的急性毒性,为烟嘧磺隆原药的安全使用提供毒理学依据.方法:急性经口、经皮毒性试验,眼、皮肤刺激试验以及皮肤过敏试验均按照我国现行<农药登记毒理学试验方法>规定方法进行.结果:烟嘧磺隆原药急性经口半数致死量(LD50)>5 000 mg/kg,经皮LD50 >2 000 mg/kg,经口、经皮均属低毒,对兔眼及豚鼠皮肤无刺激性,对豚鼠致敏率为0,致敏率强度1级,属于弱致敏物.结论:烟嘧磺隆原药对人畜较为安全.     

乙酰甲胺磷·三唑磷乳油的毒性研究

目的研究以乙酰甲胺磷和三唑磷为主要成分的乳油的急性毒性,为其毒理安全性评价提供依据。方法按国家标准GB15670—1995进行急性经口、经皮、吸入毒性试验,急性皮肤及眼刺激试验、皮肤致敏试验。结果20％乙酰甲胺磷·三唑磷乳油对雌雄性sD大鼠经口LD50均为369mg／kg．BW;急性经皮LD50〉2000mg／kg．BW;急性吸入LC50〉2000mg／m3;对家兔皮肤刺激反应积分均值为0;急性眼刺激积分指数（I．A．O．I．）=6．0,（M．I．0．I．）48h为0;对豚鼠皮肤致敏率为0。结论20％乙酰甲胺磷·三唑磷乳油经口毒性属于中等毒,经皮毒性属于低毒,吸入毒性属于低毒,时眼睛有轻度刺激性。对皮肤无刺激性,对豚鼠致敏强度分类为弱致敏。     

多菌灵复合硫磺悬浮剂的急性毒性研究

目的研究以多菌灵和硫磺为主要成分的悬浮剂的急性毒性，为其毒理安全性评价提供依据。方法按国家标准GB15670-1995进行经口、经皮、吸入毒性、急性皮肤及眼刺激试验、皮肤致敏试验。结果40％多菌灵·硫磺悬浮剂对雌雄性SD大鼠经口LD50分别为4300mg／kg·BW和2710mg／kg·BW；对雌雄性SD大鼠急性经皮LD50〉2000mg／kg·BW；急性吸入LD50〉2000mg／m^3；皮肤刺激反应积分均值为1.0；无急性眼刺激性。皮肤致敏率为0。结论40％多菌灵·硫磺悬浮剂为低毒，无眼刺激性、轻度皮肤刺激性弱致敏性的农药。     

96%禾草敌原药的急性毒性研究

目的：观察96%禾草敌原药的急性毒性,为其安全生产和使用提供科学依据。方法：通过急性经口毒性试验、急性经皮毒性试验、皮肤和眼睛刺激试验及皮肤致敏试验对96%禾草敌原药的急性毒性进行综合评价。结果：以雌雄性大鼠为试验动物,96%禾草敌原药急性经口、经皮LD50（95%可信限）分别为681（562～1 210）mg/kg和1 470（1 210～2 610）mg/kg;家兔皮肤刺激平均分值为0;眼刺激积分指数（I.A.O.I）最高为2,眼刺激的平均指数（M.I.O.I）48 h后为0;豚鼠皮肤致敏率为0%。结论：在本实验条件下,96%禾草敌原药急性经口、经皮毒性分别属低毒类和中等毒类,对皮肤和眼睛均为无刺激性,属弱致敏性农药。     

新疆特有染发剂海娜粉的急性毒性研究

目的 探讨新疆特有染发剂海娜粉的安全性.方法 采用小鼠经口急性毒性试验、皮肤刺激性/腐蚀性试验、急性眼刺激性/腐蚀性试验,观察海娜粉的急性经口毒性及其对皮肤、眼睛的刺激强度.结果 海娜粉的小鼠急性经口半数致死量(LD50)＞5 000 mg/kg;对小鼠皮肤刺激属0～＜0.5级,即为无刺激性;对小鼠眼刺激积分为0,即为无刺激性.结论 新疆特有染发剂海娜粉属无急性毒性、无刺激性的天然染发剂.     

40%甲基毒死蜱乳油的急性毒性研究

目的：研究40％甲基毒死蜱乳油的急性毒性作用,为其中毒防治提供依据。方法：参照GB15670－1995年卫生毒理学急性毒性试验方法,结果：该农药急性经口LD50,雌性大鼠为5620mg/kg,雌性大鼠为3160mg/kg;急性经皮LD50＞2150mg/kg;皮肤刺激强度 平均分值为1．3,眼刺激积分指数（I．A．O．I）最高数为34,眼刺激的平均指数（M．I．O．I）7d后为3．3。结论：40％甲基毒死蜱乳油急性经口,经皮毒性均属于低毒级,急性皮肤刺激属于轻度刺激性,对眼属于中度刺激性。     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.