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| 1 | 时间域瞬变电磁法中心方式全程视电阻率的数值计算显示文摘给出了一种时间域瞬变电磁法视电阻率的数值计算方法 ,利用该方法可以容易地求出中心方式的全程视电阻率 .根据中心方式磁场垂直分量时间变化率 Bz T的核函数Y′(Z)的表现特征 ,以参数Z把整个瞬变过程分为早期阶段 (Z >1.6 )、早期到晚期的转折点 (Z =1.6 )和晚期阶段 (Z <1.6 ) .首先分别得到早期视电阻率和晚期视电阻率的精确值 ,然后通过转折点构成一条完整的全程视电阻率曲线 .虽然磁场垂直分量Bz 的核函数Y(Z)是参数Z的单值函数 ,但同样存在一个从早期到晚期的转折点Z =1.6 ,转换点两边仍然可以得到一条早期曲线和一条晚期曲线 .在数值计算中 ,当迭代步长ΔZ <0 .0 0 5Z时 ,视电阻率的相对误差小于 0 .5 % .理论模型和实际数据计算表明 ,与早期和晚期近似值比较 ,全程视电阻率具有更高的精度和分辨率 . | 白登海 Maxwell A Meju 卢健 王立凤 何兆海 | 2003 | 地球物理学报2003，46，5： | 157 |
| 2 | Antidiarrheal activity of Pterocarpus erinaceus methanol leaf extract in experimentally-induced diarrhea显示文摘Objective:To investigate the antidiarrheal activity of the methanol leaf extract of Pterocarpus erinaceus in vivo.Methods:The methanol leaf extract of Ptemcarpus erinaceus was evaluated using different doses(100,200 and 400 mg/kg body weight) orally for antidiarrheal activity using castor oil-induced diarrhea,charcoal meal transit lime and castor oil-induced enteropooling in different groups of albino Wistar mice.The activity of the extract at different doses were compared to diphenoxylate(3 mg/kg) and atropine sulphate(3 mg/kg) which were used as standard reference drugs and also to the distilled water administered negative control group of mice.Results:The extract at the doses used caused a significant(P< 0.01) reduction in the wet faeces passed by the mice in the castor oil-induced diarrhea,decreased the distance travelled by the charcoal meal by up to 54.8%and also caused a dose dependent and significant(P< 0.001) reduction in the intraluminal fluid accumulation in the castor oil-induced enteropooling. Conclusions:Our results indicate that Pterocarpits erinaceus extract produced significant antidiarrheal activity and the action may attribute to inhibition of gastrointestinal movement and fluid secretion. | Ezeja Maxwell I Ezeigbo Ihechiluru I Madubuike Kelechi G Udeh Nkiru E Ukweni Iheanacho A Akomas Stella C Ifenkwe Daniel C | 2012 | Asian Pacific Journal of Tropical Medicine2012，5，2： | 3 |
| 3 | Doped graphene/carbon black hybrid catalyst giving enhanced oxygen reduction reaction activity with high resistance to corrosion in proton exchange membrane fuel cells显示文摘Nitrogen doping of the carbon is an important method to improve the performance and durability of catalysts for proton exchange membrane fuel cells by platinum–nitrogen and carbon–nitrogen bonds. This study shows that p-phenyl groups and graphitic N acting bridges linking platinum and the graphene/carbon black(the ratio graphene/carbon black = 2/3) hybrid support materials achieved the average size of platinum nanoparticles with(4.88 ± 1.79) nm. It improved the performance of the lower-temperature hydrogen fuel cell up to 0.934 W cm^(-2) at 0.60 V, which is 1.55 times greater than that of commercial Pt/C. Doping also enhanced the interaction between Pt and the support materials, and the resistance to corrosion, thus improving the durability of the low-temperature hydrogen fuel cell with a much lower decay of 10 mV at 0.80 A cm^(-2) after 30 k cycles of an in-situ accelerated stress test of catalyst degradation than that of 92 mV in Pt/C, which achieves the target of Department of Energy(<30 mV). Meanwhile,Pt/Nr EGO_(2)-CB_(3) remains 78% of initial power density at 1.5 A cm^(-2) after 5 k cycles of in-situ accelerated stress test of carbon corrosion, which is more stable than the power density of commercial Pt/C, keeping only 54% after accelerated stress test. | Zhaoqi Ji Jianuo Chen María Pérez-Page Zunmin Guo Ziyu Zhao Rongsheng Cai Maxwell T.P.Rigby Sarah J.Haigh Stuart M.Holmes | 2022 | Journal of Energy Chemistry2022，31，5： | 2 |
| 4 | Cesarean scar pregnancy显示文摘 | Ash A Smith A Maxwell D | 2007 | BJOG2007，114，3： | 1 |
| 5 | Caesarean scar pregnancy 显示文摘 | Ash A Smith A Maxwell D | 2007 | BJOG2007，114，3： | 1 |
| 6 | Chrysoeriol and luteolin released from alfalfa seeds induce nod genes in Rhizobium meliloti显示文摘 | Hartwing U A Maxwell C A Joseph C M | 1990 | Plant Physiology1990，92，： | 1 |
| 7 | A simple model for grain refinement during solidification显示文摘 | Maxwell I Hellawell A | 1975 | Acta Metallurgica1975，23，： | 1 |
| 8 | Aggressive angiomyxoma of pelvic parts exhibits oestrogen and progesterone receptor positivity显示文摘 | McCluggage WG Patterson A Maxwell P | 2000 | J Clin Pathol2000，53，8： | 1 |
| 9 | Caesarean scar pregnancy显示文摘 | Ash A Smith A Maxwell D | 2007 | BJOG2007，114，3： | 1 |
| 10 | Caesarean scar pregnancy显示文摘 | Ash A Smith A Maxwell D | 2007 | BJOG2007，114，： | 1 |
| 11 | Sensitivity of condensation cured polysiloxane rubbers to sealed and open to air thermalageing regimes显示文摘 | Patel M Skinner A R Maxwell R S | 2005 | Polymer Testing2005，24，5： | 1 |
| 12 | Hyaluronan and hyaluronan synthases: potential therapeutic targets in cancer 显示文摘 | Adamia S Maxwell C A Pilarski L M | 2005 | Curt Drug Targets Cardiovasc Haematol Disord2005，5，1： | 1 |
| 13 | An analysis of the peritectic reaction with particular reference to Al-Ti alloys显示文摘 | Maxwell A Hellawell | 1975 | Acta Metallurgica1975，23，： | 1 |
| 14 | Recombinanthuman tumor necrosis factor-Fc for the treatment of rheumatoidarthritis显示文摘 | Lethaby A Lopez-Olivo MA Maxwell L | 2013 | Cochrane Database Syst Rev2013，5，00： | 1 |
| 15 | Reactivation of Snail genes in renal fibrosis and carcinomas:a process of reversed em- bryogenesis?显示文摘 | Boutet A Esteban MA Maxwell PH | 2007 | Cell Cycle2007，6，6： | 1 |
| 16 | Quinolone-DNA interaction:sequence-dependent binding to single-standed DNA reflects the interaction within the gyrase-DNA complex显示文摘 | Noble CG Barnard FM Maxwell A | 2003 | Antimicrob Agents Chemother2003，47，： | 1 |
| 17 | Carcinoma of the rectum:a 10-year experience显示文摘 | Dixon A R Maxwell W A Holmes J T | 1991 | Br J Surg1991，78，3： | 1 |
| 18 | Caesarean scar pregnancy 显示文摘 | Ash A Smith A Maxwell D | 2007 | B JOG2007，114，： | 1 |
| 19 | NOS inhibition acceler- ates atherogenesis: reversal by exercise 显示文摘 | Niebauer J Maxwell A J Lin P S | 2003 | Am J Physiol Heart Cire Physiol2003，285，2： | 1 |
| 20 | Cesarean scar pregnancy 显示文摘 | Ash A Smith A Maxwell D | 2007 | B JOG2007，114，3： | 1 |
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