检索结果-南通市图书馆

Geochemistry of the Neoproterozoic Volcanic Rocks of the Nakora Area of Malani Igneous Suite, Barmer District, Western Rajasthan, India

引用

Open Journal of Geology 2022年第2期12卷 91-110页

作者： Naresh kumar Sarita Mann Swati rana Savita kumari Yashpal Paryant Ashwani Department of Geology Kurukshetra University Kurukshetra Haryana India

The Neoproterozoic rocks of the Nakora Ring Complex (NRC) consist of three phases (Extrusive, Intrusive and Dyke) that are based on the detailed geological mapping (contact relationship, mode of occurrence, position of xenolith, flows, dykes and veins) and their stratigraphic position. NRC consists mainly of acid volcanic rocks besides minor amount of basic rocks with intermediate calc-alkaline to tholeiitic affinities and occurs in the form of ring structures. The Nakora basaltic rocks show LREE enriched nature and they have consistent negative Nb, Ta, Sr and Zr anomalies. The HREE pattern is showing parallel arrangement with HREE pattern of other basic rocks. The Nakora acid volcanic rocks exhibit high LREE enrichment than the HREE with negative Ba, Sr, Eu and Ti anomalies in primitive mantle normalized multi-element diagrams. All the samples show negative Ba, Sr, Eu and Ti anomalies. The diminution in amounts of Sr and Eu is apparently related to the fractionation of feldspars or their retention in the refractory minerals resistant to melting in the lower crust. As compared to trachytes, the rhyolites show high SiO2, high Al2O3, low total alkalis, low total iron, low TiO2, high CaO and high MgO. The petro-mineralogical and geo-chemical data specifies that the NRC rocks are generated from a co-magmatic source through a co-genetic process in a rift tectonic context. Petrogenetic modeling indicates that both the basic rocks and acid volcanic rocks of Nakora may have been derived from rocks akin to Bhilwara mafic metavolcanic/mixed Nakora gabbros and Siwana rhyolite/banded gneiss from Kolar Schist Belt by different degrees of partial melting respectively.

关键词： Neoproterozoic Volcanic Rocks Geochemistry Nakora Malani Igneous Suite

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phenol in High-mass Star-forming Regions

引用

Research in Astronomy and Astrophysics 2022年第6期22卷 256-268页

作者： rana Ghosh Milan Sil Suman kumar Mondal Prasanta Gorai Dipen Sahu Rahul kumar Kushwaha Bhalamurugan Sivaraman Ankan Das Indian Centre for Space Physics 43 ChalantikaGaria Station RoadKolkata 700084India S.N.Bose National Centre for Basic Sciences Salt LakeKolkata 700106India Department of Space Earth&EnvironmentChalmers University of TechnologySE-41296 GothenburgSweden Institute of Astronomy and Astrophysics Academia Sinica Taipei Taipei 10617China Atomic and Molecular Physics Laboratory Institute for Nuclear Research(Atomki)Debrecen H-4026Hungary Physical Research Laboratory NavrangpuraAhmedabad 380009India

Phenol,which belongs to the C_(6)H_(6)O isomeric group,is the simplest molecule in the family of alcohol of the aromatic *** phenol has yet to be detected in the interstellar medium,a tentative identification was reported toward the Orion KL hot core using the IRAM-30 m line *** explore some more species of this isomeric group,we consider ten species to study the fate of their astronomical *** is noticed that phenol is the most energetically favorable isomer of this *** contrast,propargyl ether is the least favorable(having relative energy~103kcal mol^(-1)compared to phenol)species of this *** far,the studies associated with the formation of phenol are heavily concentrated on combustion ***,we suggest a few key reactions(C_(6)H_(6)+OH→C_(6)H_(5)+H_(2)O,C_(6)H_(6)+O→C_(6)H_(5)OH,C_(6)H_(6)+H→C_(6)H_(5)+H_(2),and C_(6)H_(5)+OH→C_(6)H_(5)OH+hν)for the formation of *** these pathways are included in a large gas-grain chemical network to study its formation in high mass star-forming regions and dark cloud *** is noticed that the phenyl(-C_(6)H_(5))formation by the ice-phase hydrogen abstraction reaction of benzene(i.e.,C_(6)H_(6)+OH→C_(6)H_(5)+H_(2)O if allowed at~10 K)could serve as the starting point for the formation of phenol in the gas phase by radiative association reaction C_(6)H_(5)+OH→C_(6)H_(5)OH+hν.The gasphase reaction C_(6)H_(6)+O→C_(6)H_(5)OH significantly contributes to the formation of phenol,when the ice-phase reaction C_(6)H_(6)+OH→C_(6)H_(5)+H_(2)O is not considered at low *** 4 ALMA archival data of a hot molecular core,G10.47+0.03,are *** yields an upper limit on phenol abundance of 5.19×10^(-9).Our astrochemical model delivers an upper limit on phenol abundance of~2.20×10^(-9)in the hot molecular core,whereas its production in the dark cloud is not satisfactory.

关键词： astrochemistry-ISM abundances-ISM molecules-(ISM:)evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Change in pulse rate with Enviro Chip and dummy chip fixed on radiation emitting devices like mobile phones/computers/laptops of users—A double blind crossover study

引用

Journal of Biomedical Science and Engineering 2013年第8期6卷 805-811页

作者： Ajay Poddar Sunita rana Vanita Mittal Saroj kumar Sabath Danish Mahmood Head of Department Emergency Max Hospital New Delhi India Max House 1 Dr. Jha Marg Okhla Phase III New Delhi India Max Super Specialty Hospital New Delhi India Syenergy Environics Limited New Delhi India

Use of Electronic gadgets such as mobile phones, computers/laptops constitutes an integral part of human day-to-day activity in offices and businesses. Therefore, their use cannot be stopped. These electronic gadgets emit electromagnetic radiations, which are believed to be hazardous to human health. World Health Organization/International Agency for Research on Cancer has classified radiofrequency electromagnetic fields as possibly carcinogenic to humans (Group B). The Enviro Chip developed by Synergy Environics, India, is a radiation harmonizing chip which when fixed on electronic gadgets at specific locations claims to reduce stress level by reducing the pulse rate of users which may also result in improvement of other health parameters. In this study, we have tested the ability of the Enviro Chip to reduce pulse rate of people who may have developed high pulse rate due to prolonged use of electronic gadgets. This was the double blind crossover study conducted in 205 healthy volunteers having an average pulse rate of above 82 per Minute at Max Healthcare India. The primary objective of the study was to evaluate and compare the change in pulse rate over 14 measurements with the use of both the Enviro Chip and a Dummy chip from average pulse rate at baseline without the Placebo effect. The secondary objective was to evaluate the change in pulse rate gender-wise. Data analysis was done using Wilcoxon Sign Rank test. The study demonstrated statistical significant reduction in pulse rate over 14 measurements with the use of Enviro Chip in both male and female healthy volunteers

关键词： Electromagnetic Radiations Pulse Rate Enviro Chips Radiation Harmonization Mobile Phones

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Satellite Clock Error and Orbital Solution Error Estimation for Precise Navigation Applications

引用

Positioning 2014年第1期5卷 22-26页

作者： Bharati Bidikar Gottapu Sasibhushana Rao Laveti Ganesh MNVS santosh kumar Department of ECE AITAM Tekkali India Department of ECE Andhra University Visakhapatnam India Department of ECE ANITS Visakhapatnam India

Global Positioning System (GPS) is a satellite-based navigation system that provides a three-dimensional user position (x,y,z), velocity and time anywhere on or above the earth surface. The satellite-based position accuracy is affected by several factors such as satellite clock error, propagation path delays and receiver noise due to which the GPS does not meet the requirements of critical navigation applications such as missile navigation and category I/II/III aircraft landings. This paper emphasizes on modelling the satellite clock error and orbital solution (satellite position) error considering the signal emission time. The transmission time sent by each satellite in broadcast ephemerides is not accurate. This has to be corrected in order to obtain correct satellite position and in turn a precise receiver position. Signal transmission time or broadcast time from satellite antenna phase center is computed at the receiver using several parameters such as signal reception time, propagation time, pseudorange observed and satellite clock error correction parameters. This corrected time of transmission and broadcast orbital parameters are used for estimation of the orbital solution. The estimated orbital solution was validated with the precise ephemerides which are estimated by Jet Propulsion Laboratory (JPL), USA. The errors are estimated for a typical day data collected on 11th March 2011 from dual frequency GPS receiver located at Department of Electronics and Communication Engineering, Andhra University College of Engineering, Visakhapatnam (17.73°N/83.319°E).

关键词： Satellite Clock Error Satellite Clock Offset Orbital Solution Broadcast Ephemerides

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparative in-vitro analysis of different brands of paracetamol tablets available in Nepal

引用

Journal of Coastal Life Medicine 2016年第8期4卷 645-648页

作者： Ganesh Man Singh Thakuri Kailash kumar Yadav Rahul rana Chhetri Department of Pharmaceutical Chemistry Doon(PG)Paramedical College and Hospital DehradunHemavati Nandan Bahuguna Garhwal UniversityPauri GarhwalUttarakhandIndia Department of Microbiology Tribhuwan UniversityKathmanduNepal Department of Pharmacy Pokhara UniversityPokharaKaskiNepal

Objective:To examine the physico-chemical parameters of commercially available local and multinational brands of paracetamol tablets in ***:Different five paracetamol brands were explored by testing various parameters according to standard *** studied parameters included weight variation,friability,disintegration,dissolution and *** limits of the official test were referenced from official guidelines of Indian Pharmacopoeia(IP)and British Pharmacopoeia(BP).All brands were tested according to their pharmacopoeial claim and methods for these tests were successfully conducted to find out their *** methods were economic and ***:Requirements of weight variation and friability value were complied by all *** minutes of disintegration time were also complied by all the brands according to the BP/IP recommendation for uncoated *** brands showed not less than 80%drug release in 45 min as per BP and not less than 85%in 30 min as per *** of each brand was found to be within the range of 95%-105%.The present findings suggested that about every paracetamol brand which was accessible in Nepali market encountering the IP/BP ***:Although the physico-chemical examinations such as weight variation,friability,disintegration,dissolution and assay were detected varying brand wise,but were found interior to defined *** an over-the-counter drug,the consumption of paracetamol is too ***,it is important for each brand to be genuine,good manufactured and well ***,additional exploration over the quality of paracetamol is compulsory for safe human consumption.

关键词： Acetaminophen Comparative study In-vitro analysis Paracetamol Physico-chemical test Quality control parameters

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acute onset of massive epistaxis due to post-traumatic cavernous internal carotid artery pseudoaneurysm: A case report

引用

Journal of Acute Disease 2021年第1期10卷 39-41页

作者： santosh kumar Swain Alok Das Satyabrata Acharya Nibi Shajahan Rohit Agrawala Department of Otorhinolaryngology IMS and SUM HospitalSiksha"O"Anusandhan University(Deemed to be)K8Kalinga NagarBhubaneswar-751003OdishaIndia

Rationale:Cavernous internal carotid artery(ICA)pseudoaneurysm caused by non-penetrating head trauma is a rare cause of massive *** sudden onset of epistaxis due to such a fatal aneurysm protruding into the sphenoid sinus is extremely rare in clinical *** management is often challenging because of anatomical inaccessibility of the bleeding ***'s concern:A 42-year-old man with a history of head trauma showing an ICA aneurysm eroding the sphenoid sinus followed by massive ***:A computerized tomography(CT)scan showed a fracture in the sphenoid *** angiogram revealed cavernous ICA ***:Endovascular coil ***:The patient recovered well and was discharged without any neurological deficits Lessons:Cavernous ICA pseudoaneurysm may lead to a life-threatening *** a patient has a history of head trauma,post-traumatic cavernous ICA pseudoaneurysm should be considered a differential diagnosis of massive epistaxis.

关键词： Massive epistaxis Pseudoaneurysm Internal carotid artery Coil embolization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Subacute posttraumatic ascending myelopathy： A case report and review of literature

引用

Chinese Journal of Traumatology 2015年第1期18卷 48-50页

作者： Mukul Mohindra V.K. Gautam Lalit Maini santosh kumar Saurabh Verma Department of Orthopaedics Maulana Azad Medical College and Associated Hospitals New Delhi India

Subacute posttraumatic ascending myelopathy is a rare disorder, unrelated to syrinx formation or mechanical instability, which may gradually emerge within the first 1-2 weeks after a spinal cord injury and may lead to diagnostic and prognostic dilemmas. We present a case of 24-year-old female with unstable wedge compression fracture of Ll vertebrae with signal changes in the upper lumbar cord causing complete paraplegia below D9 with bladder and bowel involvement. In the subsequent week, she developed a delayed progressively increasing neurological deficit with cord signal abnormality on MRI extending cephalad from the injury site to the upper dorsal cord. The patient had no initial clinical improvement initially but showed a delayed recovery over months.

关键词： Posttraumatic ascending myelopathy Spinal cord injury Wedge compression fracture

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

白内障合并翼状胬肉患者行联合手术后的疗效观察

引用

国际眼科杂志 2021年第12期21卷 2021-2025页

作者： Kshama Dwivedi Dawar Shuja Pranav Saluja Mayank Srivastava santosh kumar Sanchita Saini Moti Lal Nehru医学院眼科印度普拉亚格拉杰211001

目的:观察白内障合并翼状胬肉患者行联合手术后的疗效。方法:对22例(平均年龄:59.05±8.70岁)并发白内障和翼状胬肉(长度2-5mm)患者进行前瞻性单中心研究,随访时间为3mo~1a。测定术前和术后3mo的平均角膜曲率(Kmean)、平均散光和最佳矫... 详细信息

目的:观察白内障合并翼状胬肉患者行联合手术后的疗效。方法:对22例(平均年龄:59.05±8.70岁)并发白内障和翼状胬肉(长度2-5mm)患者进行前瞻性单中心研究,随访时间为3mo~1a。测定术前和术后3mo的平均角膜曲率(Kmean)、平均散光和最佳矫正视力(LogMAR)。观察术前角膜曲率和翼状胬肉大小与预测误差的关系。结果:共18例(81.8%)患者PE1.00D的患者。手术前后眼轴长度无差异(P=0.77)。Kmean从术前42.994±1.536增加到术后43.324±1.479(P=0.105)。术后角膜散光由术前2.09±0.789D降至术后0.523±0.277D(P<0.05)。BCVA(LogMAR)从术前1.007±0.402显著提高到术后0.024±0.062(P<0.05)。角膜曲率变化与预测误差无相关性(r=-0.29,P=0.19)。翼状胬肉大小与预测误差无相关性(r=0.2997,P=0.17)。结论:超声乳化与折叠式人工晶状体植入联合自体结膜移植术的应用是一种安全有效的手术方法。

关键词：并发白内障和翼状胬肉人工晶状体屈光度计算超声乳化联合自体结膜移植术的应用

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Noninvasive method for determining blood pressure and contours of arterial and volume pulses

引用

Journal of Biomedical Science and Engineering 2008年第2期1卷 79-84页

作者： K. Razi Naqvi Luca Parigi Camer W. Vellani santosh kumar Department of Physics Norwegian University of Science and Technology The Aga Khan University

A noninvasive method for monitoring blood pressure, based on the principles established by Riva-Rocci and Korotkoff (K), is described;it furnishes, after a single compression-deflation cycle of the arm-encircling cuff, values of sys-tolic and diastolic blood pressures as well as the contours of the brachial arterial pulse and the corresponding volume pulse. K-sounds are detected by a single microphone situated in the cubital fossa, and the time-varying cuff pressure P(t) is read by a piezoresistive pressure sensor. The behavior of P(t) during deflation is resolved into two parts, P(t)=p(t)+b(t);p is a train of posi-tive going pulses (arising from arterial pulsa-tions), whereas b is a slowly changing baseline. Noise pulses in the microphone output are re-jected by using the observation that the first few K-sounds are emitted when p is close to a maxi-mum, and the last few when dp/dt is close to a maximum. The performance of the instrument is illustrated by showing how it copes with ambi-ent noise and involuntary manual perturbations of P, and by presenting contours of various pulses.

关键词： Blood pressure oscillometry brachial pulse wave analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

肿瘤小鼠模型建立应用进展

引用

中华肿瘤防治杂志 2022年第2期29卷 92-101页

作者：周云振 santosh kumar Jha 孙海明孙冬琳金焰吴楠中国遗传资源保护与疾病防控教育部重点实验室哈尔滨医科大学医学遗传学研究室黑龙江哈尔滨150081

近百余年中,小鼠模型在医学研究中扮演着重要的角色,在肿瘤基础研究以及转化医学研究中具有重要的意义。随着肿瘤研究进展的不断加深,从最初的肿瘤移植模型到近年的基因编辑模型,模型小鼠的应用日益广泛。在人体环境中,不同的肿瘤在发... 详细信息

近百余年中,小鼠模型在医学研究中扮演着重要的角色,在肿瘤基础研究以及转化医学研究中具有重要的意义。随着肿瘤研究进展的不断加深,从最初的肿瘤移植模型到近年的基因编辑模型,模型小鼠的应用日益广泛。在人体环境中,不同的肿瘤在发生、发展及转移等方面均存在着差异。因此,建立合适的小鼠模型是开展肿瘤研究的必要条件。本研究总结目前肿瘤研究中最常用的小鼠模型和动物实验伦理要求,并展望了肿瘤小鼠模型未来的发展方向。

关键词：肿瘤小鼠模型动物伦理学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：