|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 早产儿贫血病因与防治研究进展显示文摘近年来,随着围产医学及新生儿急救医学的发展、产前糖皮质激素和外源性肺表面活性物质的广泛应用、高配置暖箱及多种呼吸机模式的支持,早产儿,包括极低出生体重儿(very low birth weight,VLBW)和超低出生体重儿(extremely low birth weight,ELBW)的存活率已有显著提高[1]。新生儿贫血症是早产儿,尤其是VLBW和ELBW常见且严重的并发症之一,如不及时纠正, | 侯劲伊 谢晓恬 | 2017 | 中国小儿血液与肿瘤杂志2017,22,2: | 10 |
| 2 | Synthesis, isolation and characterization of methyl levulinate from cellulose catalyzed by extremely low concentration acid显示文摘A direct synthesis of methyl levulinate from cellulose alcoholysis in methanol medium under mild condition(180 210 C)catalyzed by extremely low concentration sulfuric acid(0.01 mol/L)and the product isolation were developed in this study.Effects of different process variables towards the catalytic performance were performed as a function of reaction time.The results indicated that sulfuric acid concentration,temperature and initial cellulose concentration had significant effects on the synthesis of methyl levulinate.An optimized yield of around 50%was achieved at 210 C for 120 min with sulfuric acid concentration of 0.01 mol/L and initial cellulose concentration below 100 g/L.The resulting product mixture was isolated by a distillation technique that combines an atmospheric distillation with a vacuum distillation where n-dodecane was added to help distill the heavy fraction.The light fraction including mainly methanol could be reused as the reaction medium without any substantial change in the yield of methyl levulinate.The chemical composition and structural of lower heavy fraction were characterized by GC/MS,FTIR,1H-NMR and13C-NMR techniques.Methyl levulinate was found to be a major ingredient of lower heavy fraction with the content over 96%.This pathway is efficient,environmentally benign and economical for the production of pure levulinate esters from cellulose. | Hui Li Lincai Peng Lu Lin Keli Chen Heng Zhang | 2013 | Journal of Energy Chemistry2013,22,6: | 9 |
| 3 | Experimental studies on extremely low frequency pulsed magnetic field inhibiting sarcoma and enhancing cellular immune functions显示文摘The previous observation with an electron microscope showed that extremely low frequency (ELF) pulsed magnetic field (PMF) (with the maximum intensity of 0. 6-2. 0 T, gradient of 10-100 T. M-1, pulse width of 20-200 ms and frequency of 0. 16-1. 34 Hz) inhibited the growth of S-180 sarcoma in mice and enhanced the ability of immune cell’s dissolving sarcoma cells. In this study, the DNA contents of nuclei were assayed by using Faulgen Staining method. With an electron microscope and cell stereoscopy technology it was observed that magnetic field affected the sarcoma cell’s metabolism, lowered its malignancy, and restrained its rapid and heteromorphic growth. The magnetic field enhanced the cellular immune ability and the reaction of lymphocytes and plasma. Since ELF pulsed magnetic fields can inhibit the growth of sarcomas and enhance the cellular immune ability, it is possible to use it as a new method to treat cancer. | 张沪生 叶晖 张传清 曾繁清 黄兴鼎 张晴川 李宗山 杜碧 | 1997 | Science China(Life Sciences)1997,40,4: | 8 |
| 4 | Primary pulmonary rhabdomyosarcoma in an adult:a case report and review of the literature显示文摘Primary pulmonary rhabdomyosarcoma (RMS)is one of the most common soft-tissue malignancies in children, but is rare in persons aged >45 years (Triche,1997; Ferrari et al., 2003). RMS is considered to result from the malignant transformation of primitive mesenchymal cells. | Gui-yi JI Hui MAO | 2013 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2013,14,9: | 5 |
| 5 | NUMERICAL SIMULATION OF EXTREMELY HEAVY RAIN AND MESO-β SCALE LOW VORTEX IN INVERTED TYPHOON TROUGH显示文摘Large-scale and mesoscale analyses are made for extremely heavy rain (EHR) and meso-β scale low vortex (MSLV) in Jiading District of Shanghai Municipality during 6-7 July 2001.It is shown that the EHR forms in the situation of northern westerly trough linking together with southern inverted typhoon trough at northwest side of the West Pacific Ocean subtropical high. Numerical simulation is made using a 21-layer improved REM (regional η coordinate model) for this course.The results show that the precipitation forms earlier than MSLV.and the strong convergence in wind velocity mate (WVM) triggers the strong precipitation.The formative reasons of WVM.especially the weak wind velocity center are discussed,and the formative mechanisms of the MSLV and EHR are discussed using high spatial and temporal resolution model- output physical fields.The results show that the heavy rain releases latent heat and warms the air column,and enhances the low level positive vorticity that existed before.Then it causes the formation of MSLV.There is a positive feedback mechanism between low vortex and precipitation,so CISK must be an important mechanism. | 姜勇强 王昌雨 张维桓 陈中一 | 2004 | Acta meteorologica Sinica2004,18,2: | 4 |
| 6 | Effect of the shelterbelt along the Tarim Desert Highway on air temperature and humidity显示文摘The temperature and humidity of the shelterbelt micro-climate on both horizontal and vertical scales in the extremely drought area were measured with multiple HOBO temperature and humidity automatic observation equipments in the hinterland of the Taklimakan Desert. The results show that the shelterbelt ecosystem of the desert highway plays typical micro-climate adjustment rolesin stabilizing surface air temperature and increasing air humidity, and so on. Solar radiation significantly affects both temperature and humidity of surface layers, and it has a positive correlation with the temperature but a negative correlation with the air humidity. When it is cloudy, the weather has a great impact on keeping temperature and humidity in the shelterbelt. The shelterbelt also significantly influences the environment, and the micro-climate in the belt has an obvious characteristic of cooling and humidification: compared with the original sand area, the temperature in the shelterbelt is always lower and the humidity is always higher. Moreover, the temperature range at the shelterbelt edge is greater than that in the sand area, but the humidity is always higher. Our conclusion is that the vertical-effect range of temperature of the shelterbelts is 4 -10 m, and the humidity range is 6 to 8 m; the horizontal-effect range of temperature is 16 m and the humidity range is about 24 m. | WANG HaiFeng LEI JiaQiang LI ShengYu FAN JingLong LI YingGang SUN ShuGuo CHANG Qing | 2008 | Chinese Science Bulletin2008,53,S2: | 4 |
| 7 | Melanoma of the gallbladder misdiagnosed as gallbladder cancer显示文摘To the Editor:Metastatic melanoma of the gallbladder is extremely rare,and despite appropriate therapy its prognosis is poor withfew patients surviving more than 2 years. We present acase of gallbladder involvement by malignant melanomain | Renata Potonyacz Colaneri Bárbara dos Santos Nunes Paulo Herman | 2010 | Hepatobiliary & Pancreatic Diseases International2010,9,1: | 3 |
| 8 | The Background Variation of Natural Source ELF and Its EM Abnormal Phenomena in Yunnan Earthquakes显示文摘In order to add earthquake monitoring methods and develop new method research,the ELF Network for Earthquake Monitoring selected 30 stations in the Capital Circle and the Sichuan-Yunnan region. Finding electromagnetic field background variation is the basis of distinguishing the seismic electromagnetic anomalies. This paper introduces the data acquisition and selection of the Shexian,Anqiu,Lijiang and Dali stations which have recorded for longer time with better data and are located on the similar latitude. Then we use the natural source electromagnetic field's auto-power spectrum to express the intensity of the electromagnetic field. By using power spectral data of many frequencies in the observation frequency band,after the data pre-processing and sliding average noising,the background variation of extremely low frequency stations and the range ability were acquired.Taking the Baoshan M5. 1 earthquake on October 30,2015 and Dali M5. 0 earthquake on May 18,2016 as examples,the authors analyzed the earthquake electromagnetic anomaly characteristic of ELF stations around the earthquakes. | Fan Ye Tang Ji Han Bing Cui Tengfa Xu Qin | 2018 | Earthquake Research in China2018,32,1: | 2 |
| 9 | 《圣经》成语及其掌故显示文摘1.as old as Adam—extremely old;(something) known from the earliest time 同亚当一样老,极古老的,很久以前的据圣经《旧约·创世纪》记载,Adam(亚当)是上帝创造天地后造出的第一个人,亚当与其妻夏娃成了人类的祖先。“同亚当一样老”喻很久很久以前。例:That story youtold us is as old asAdam but I still | 王跃申 | 2001 | 语言教育2001,0,8: | 2 |
| 10 | Effects of extremely low frequency magnetic fields on gap junctional intercellular communication and its mechanism显示文摘The study on biological effect of electromagnetic fields has been paid close attention in recent years. Gap junctional intercellular communication (GJIC) plays an important role in the maintenance of cell proliferation and differentiation, and in the multistage process of carcinogenesis. A series of researches showed that xtremely low frequency (ELF) magnetic fields not only enhance the inhibition of GJIC induced by 12-O-tetradecanoylphorbol-13-acetate, but also inhibit GJIC directly when the intensity is equal to or more than 0.4 mT, and that the mechanisms of GJIC inhibition by ELF magnetic fields are due to hyperphosphorylation of connexin 43, which is mediated by protein kinase C-activated signal transduction, and the internalization of connexin 43 from plasma membrane to cytoplasm. | CHIANG Huai , HU Genlin and XU Zhengping(Microwave Laboratory, Zhejiang University School of Medicine, Hangzhou 310031, China) | 2002 | Progress in Natural Science:Materials International2002,12,3: | 2 |
| 11 | A BOUNDARY VALUE PROBLEM FOR A NONLINEAR ORDINARY DIFFERENTIAL EQUATION INVOLVING A SMALL PARAMETER——The Riemann problem for a Generalized Diffusion Equation显示文摘This paper studies the boundary value problem involving a small parameter((k(V(t))+ε)[V’(s)[n-1V’(s)’+(sg(V(s))+f(V(s))V’(s)=0 for s∈R,V(-∞)=A,V(+∞)=B;A<B,which originates from the Riemann problem for a generalized diffusion equntiong(U)DtU=p’(t)pN(t)Dx((k(U)+ε)|DxU|N-1DxU+p’(t)f(U)DxU for x∈R,t>0,U(x,0)=A for x<0,U(x,0)=B for x>0,under the hypotheses H1—H4.The author’s aim is not only to determine explicitly thediscontinuous solution U0(x,t)=V0(s),s=x/p(t),to the reduced problem,and the formand the number of its curves of discontinuity,but also to present,in an extremely naturalway,the jump conditions which it must satisfy on each of its curves of discontinuity.Itis proved that the problem has a unique solution Uε(x,t)=Vε(s),s=x/p(t),ε≥0,Vε(s)pointwise converges to V0(s)as ε 0,V0(s)has at least one jump point if and only if k(y)possesses at least one interval of degeneracy in[A,B],and there exists a one-to-onecorrespondence between the collection of all intervals of degeneracytof k(y)in[A,B]andthe set of all jump points of V0(s). | 王俊禹 | 1991 | Chinese Annals of Mathematics,Series B1991,12,1: | 2 |
| 12 | Resuscitation of extremely preterm infants- controversies and current evidence显示文摘Despite significant advances in perinatal medicine, the management of extremely preterm infants in the delivery room remains a challenge. There is an increasing evidence for improved outcomes regarding the resuscitation and stabilisation of extremely preterm infants but there is a lack of evidence in the periviable(gestational age 23-25 wk) preterm subgroup. Presence of an experienced team during the delivery of extremely preterm infant to improve outcome is reviewed. Adaptation from foetal to neonatal cardiorespiratory haemodynamics is dependent on establishing an optimal functional residual capacity in the extremely preterm infants, thus enabling adequate gas exchange. There is sufficient evidence for a gentle approach to stabilisation of these fragile infants in the delivery room. Evidence for antenatal steroids especially in the periviable infants, delayed cord clamping, strategies to establish optimal functional residual capacity, importance of temperature control and oxygenation in delivery room in extremely premature infants is reviewed in this article. | Pooja N Patel Jayanta Banerjee Sunit V Godambe | 2016 | World Journal of Clinical Pediatrics2016,5,2: | 2 |
| 13 | SIMULTANEOUS OVER-EXPRESSION OF INSULIN-LIKE GROWTH FACTOR- Ⅱ (IGF- Ⅱ ) AND IGF- Ⅱ RECEPTOR(IGF- Ⅱ R) GENES IN HUMAN PRIMARY CANCER-IMPLICATION OF AUTOCRINE AND PARACRINE MECHANISM IN AUTONOMOUS GROWTH OF HEPATIC CANCER显示文摘This is first report about the simultaneous over-expression of both Insulin-like growth factor (IGF- I ) and its receptor (IGF- I R) at mRNA level in human primary hepatic Cancer (PHC). In 10 PHC samples from China, IGF-I and IGF- I R were both over-expressed, whereas only a background signal was detected in normal liver. In 5 pairs of PHC and its non- tumorous adjacent liver tissues from South Africa, IGF- I and IGF- I R were also over-expressed in PHC. mRNA expression of IGF- I in all 5 cases and IGF- I R in 4 of 5 cases were higher in cancer than non- tumorous adjacent liver tissues. These results strongly implicate that an autocrine and/ or paracrine mechanism might be Involved in formation and progression of PHC. | 周筱梅 顾健人 陈渊卿 蒋惠秋 钱连芳 徐国威 David Shafritz | 1992 | Chinese Journal of Cancer Research1992,4,3: | 2 |
| 14 | EXTREMELY HIGH FREQUENCY (EHF) PUNCTURE THERAPY AND SYNDROMES OF TRADITIONAL CHINESE MEDICINE显示文摘ExtremeIy high frequency (EHF) puncture is a new method of treatment based uponbiological effects of low power electromagnetic waves of millimetric band and acupuncture theory oftraditional Chinese medicine (TCM). It is non-invasive, painless and effective. Extensiveness and variety of the specific sensations (Deqi phenomenon) during EHF-puncture re-flect intensive reactions of the patient’s organism and provide individualization of therapy. EHF-puncture is a step of integration of traditional Chinese with modern Western medicines. | MikhailTeppone AlexeyKrotenko | 1996 | World Journal of Acupuncture-Moxibustion1996,6,1: | 1 |
| 15 | Prevalence of retinopathy of prematurity in Brunei Darussalam显示文摘AIM: To identify the prevalence of retinopathy of prematurity (ROP) among preterm neonates admitted to Department of Neonatology, RIPAS hospital, Brunei Darussalam. ·METHODS: We studied 67 preterm infants fulfilling the eligibility criteria for ROP screening. All infants studied were admitted to the Department of Neonatology, RIPAS Hospital, within a period of one year. Birth weight (BW), gestational age (GA), corrected age at each review, initial and final diagnoses and number of reviews required was recorded for each infant. Infants were followed up two weekly until they reach a corrected age of 40 weeks or complete vascularization was noted. Prevalence of ROP was identified. Descriptive analysis, regression analysis and independent-sample t-test were used to statistically check for differences between ROP and non -ROP groups. ·RESULTS: A total number of 201 ROP screenings were carried out for 67 preterm infants. Males outnumbered females (56.7%). The mean number of reviews per child was (3.19 ±1.1) times (range: 1 -6 times), the mean GA among the preterm babies examined was (29.5 ±2.6) weeks (range: 23 -36 weeks), and the mean BW was 1300 ±500g (range: 660 -3600g). The prevalence of ROP among the examined infants was 34.8% . Prevalence of threshold disease that required laser treatment was 25.4% . Prevalence of ROP among those with extremely low BW was 86.7% compared to 27.8% in those with very low BW. Respiratory distress and congenital heart diseases were significantly associated with higher incidence of ROP. ·CONCLUSION: Lower BW, lower GA and female gender are associated with higher risk of developing ROP among preterm infants in Brunei Darussalam. | Nadir Ali Mohamed Ali Joshua George Nayan Joshi Elizabeth Chong | 2013 | International Journal of Ophthalmology(English edition)2013,6,3: | 1 |
| 16 | The Romantic Movement in English and American Literature显示文摘Ⅰ The Appearance of Romantic Lite-ratureThe Romantic Movement in Eng-lish literature came into being as anew trend at the turn of tlie 18th and19th centuries.It was flowering dur-ing the first half of the 19th centuryin America.During this period,the class con-tradiction and national contradictionwere extremely acute in Europe.In1789,the French Revolution broke out,,which overthrew the feudal power.As a result of this,a new | 马云霞 | 1987 | 天中学刊1987,2,2: | 1 |
| 17 | Primary malignant melanoma of lacrimal sac显示文摘Dear Sir,We write to present a case report of primary malignant melanoma of the lacrimal sac.Tumors of the lacrimal sac are rare,and most of them are benign and of epithelial origin[1].Malignant melanoma of the lacrimal sac is even rarer accounting for 5%of lacrimal sac tumors and 0.7%of ocular melanoma[2,3].To our knowledge,only 27 cases with complete clinical information have ever been reported worldwide in English literature[4-8].The disease has an insidious onset and masquerades as a | Min Ren Ji-Hong Zeng Qing-Li Luo Feng Bi Jun Chen | 2014 | International Journal of Ophthalmology(English edition)2014,7,6: | 1 |
| 18 | CULTURAL DIFFERENTIATION AND LANGUAGE MISINTERPRETATION——A Case Study of Chinese English Learner’s Comprehension of Some English Expressions显示文摘I.INTRODUCTIONLanguage,as the specific legacy of a givenculture and society,is replete with a constellationof culture-bound linguistic items.The develop-ment of language is an extremely complicated pro-cess involving many sub-cultrual factors such asmaterial culture,social culture,religious cultureand linguistic culture.Poreign language learning,as a dynamic and conscious movement from thesource language to the target language,will theo- | 杨永林 | 1993 | 山东外语教学1993,14,4: | 1 |
| 19 | Building a Community of Common Security: China's Approach to Its Neighborhood显示文摘The building of a community of common security is an extremely important yet difficult step towards the community of shared future in China’s neighborhood,mixed with competitions in power,institutions,and concepts.The'dual coordination'strategy for neighborhood security is a Chinese response to the current situation and future trends. | Ling Shengli | 2018 | China International Studies2018,63,1: | 1 |
| 20 | TIME-RESOLVED CHARACTERISTICS OF SECOND HARMONIC EMISSION FROM THE LASER-PRODUCED PLASMAS显示文摘Second harmonie (SE) emission is an important indieation of laser plasma non-linear interaction. We have got the imformation relevant to laser-plasma coupling through eareful observation of time-intograted characteristics of | 徐至展 张伟清 赵世诚 周复正 | 1983 | Chinese Science Bulletin1983,28,9: | 0 |