简介:摘要:浣熊优化算法(COA)因其灵活性和效率,在解决复杂优化问题中显示出显著的潜力。本文探讨了COA在武器目标分配(WTA)问题中的应用,分析了算法如何通过模拟浣熊的觅食行为优化搜索策略来提高目标分配的效率和准确性。通过构建数学模型和算法对比,验证了COA在WTA问题中的有效性,尤其在处理多目标和动态目标分配情况下的优势。研究结果表明,COA不仅提高了目标分配的解决速度,而且增强了解决方案的适应性和稳定性。
简介:3-hydroxy-3-methylglutaryl辅酶a(HMGCoA)reductase生产mevalonate,在胆固醇和必需品的合成的重要中介非甾醇isoprenoids。reductase通过被甾醇并且非调停的多重机制服从于反馈控制的过高的数量mevalonate的甾醇结束产品新陈代谢。这里,我将讨论为reductase的控制使一机制清楚些的最近的进展,它包含酶的快速的降级。某些甾醇的累积触发reductase的绑定到endoplasmic(嗯)膜蛋白质叫了Insig-1和Insig-2。在联系膜的ubiquitin连接酶的招募的Reductase-Insig有约束力的结果叫了gp78,它开始reductase的ubiquitination。这ubiquitination是为reductase从的识别和降级的应尽的反应嗯由cytosolic26Sproteasomes的膜。因此,reductase的加速甾醇的降级代表一般细胞的进程(嗯联系降级)怎么被用来控制一条重要新陈代谢的小径(胆固醇合成)的一个例子。
简介:摘要:本文梳理了典型费用编码参考标准,剖析了在建立标准编码体系中遇到的主要问题,结合费用要素分解思路,通过对工作及费用维度的划分,以代码动态组合形式尝试构了建项目全周期费用分解结构及费用编码。
简介:目的观察治疗前基础血脂水平对HMG-CoA还原酶抑制剂降低血清总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)以及血清甘油三酯(TG)作用的影响.方法分析1994~1999年期间进行的3项多中心临床药物试验:辛伐他汀试验(166例,平均年龄58.9岁±9.2岁),洛伐他汀试验(146例,平均年龄57.9岁±8.7岁),阿伐他汀试验(105例,平均年龄57.8岁±9.3岁).治疗前血清TC≥5.98mmol@L-1,血清TG≤4.52mmol@L-1.按治疗前基础血脂水平分组.分别口服辛伐他汀10mg@d-1,疗程8周;或洛伐他汀20mg@d-1,疗程8周;或阿伐他汀10mg@d-1,疗程6周.结果治疗前基础血清TC、LDL-C以及TG水平越高,HMG-CoA还原酶抑制剂降低相应血脂的作用越明显.辛伐他汀、洛伐他汀或阿伐他汀降低血清TC、LDL-C以及TG的幅度分别与治疗前相应的基础血脂水平呈正相关.结论HMG-CoA还原酶抑制剂降低血脂的作用与治疗前相应的基础血脂水平有关.
简介:ThepresentstudywasdesignedtoisolateandcharacterizeapurifiedextractfromFusariumsolaniFG319,termedMFS(MetaboliteofFusariumsolaniFG319)thatshowedanti-atherosclerosisactivitybyinhibiting3-hydroxy-3-methylglutarylcoenzymeA(HMG-CoA)reductase.Responsesurfacemethodology(RSM)wasemployedtoachieveanimprovedyieldfromthefermentationmedium.Theinhibitingeffectoftheisolate,MFS,onHMG-CoAreductasewasgreaterthanthatofthepositivecontrol,lovastatin.TheaveragerecoveryofMFSandtherelativestandarddeviation(RSD)rangedbetween99.75%to101.18%,and0.31%to0.74%,respectively.TheRSDsintra-andinter-assayofthethreesamplesrangedfrom0.288%to2.438%,andfrom0.934%to2.383%,respectively.FromtheRSM,theconcentrationofinducer,cultivationtime,andculturetemperatureshadsignificanteffectsontheMFSproduction,withtheeffectofinducerconcentrationbeingmorepronouncedthatotherfactors.Inconclusion,theoptimalconditionsfortheMFSproductionwereachievedusingRSMandthatMFScouldbeexploredasananti-atherosclerosisagentbasedonitsabilitytoinhibitHMG-CoAreductase.
简介:AbstractObjectives:To investigate the prevalence of ACADM pathogenic variants, c.985A>G and c.199T>C, for medium chain acyl CoA dehydrogenase deficiency (MCADD) in a healthy population in the southern region of Brazil.Methods:This was an observational cross-sectional study with a convenience sampling strategy. The participants were recruited from the blood bank of the Hospital de Clínicas of Porto Alegre, Brazil. A total of 1000 healthy individuals from the state of Rio Grande do Sul were included. Genotyping for the c.199T>C and c.985A>G variants was performed using real-time polymerase chain reaction (PCR) and the PCR-restriction fragment length polymorphism (RFLP) technique, respectively. Individuals considered heterozygous for c.985A>G were subjected to additional acylcarnitine profile analysis using tandem mass spectrometry. Carrier frequency was obtained by calculating the ratio of heterozygous individuals to the total number of individuals analyzed and reported with a 95% confidence interval. Allele and genotype frequencies were calculated based on the Hardy-Weinberg equilibrium.Results:The c.985A>G variant was detected as heterozygotes in three individuals (frequency of the heterozygous genotype = 1:333, allele frequency= 0.0015, minimum frequency of MCADD= 1:444,444) whose acylcarnitine profiles were within normal limits. The c.199T>C variant was not identified.Conclusions:Considering the small sample size and associated allelic heterogeneity with MCADD, these findings are believed to denote the rarity or underdiagnosis of MCADD in southern Brazil. This study provides evidence for the need for further investigation to ascertain the contribution of these diseases to child morbidity and mortality in the country.