检索结果-南通市图书馆

The role of tunica vaginalis flap in staged repair of hypospadias

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Urology 2017年第2期4卷 107-110页

作者： Yogender S.Kadian Mahavir Singh kamal N.rattan Department of Paediatric Surgery Pt B D Sharma Post Graduate Institute of Medical SciencesRohtakHaryanaIndia Department of Surgery Pt B D Sharma Post Graduate Institute of Medical SciencesRohtakHaryanaIndia

Objective:The surgical repair of hypospadias is done in two stages in a select group of patients with severe *** first stage(Ⅰ)procedure consists of correction of penile shaft curvature and second stage(Ⅱ)repair involves the creation of a *** neourethra needs a cover of an intermediate layer in order to have good functional and cosmetic *** the various local flaps,tunica vaginalis flap is a good option for the use as an intermediate ***:We have managed 22 patients of chordee with hypospadias by staged *** Stage I,chordee correction was done by dividing the urethral plate and covering the penile shaft with dorsal prepucial *** Stage Ⅱ,a neourethra was created and covered with tunica vaginalis flap either through the same incision(14/22)or via a subcutaneous tunnel(8/22).An indwelling catheter was kept for 10 to 12 ***:Eighteen(81.8%)patients had successful functional and cosmetic *** patients(9.1%)had urethrocutaneous fistula of which one healed on subsequent dilatation while the other one(4.5%)needed *** fistula formation rate was 4.5%.In two patients,the external urinary meatus could be made upto subglanular or coronal ***:Staged repair of chordee with hypospadias is valuable in selected group of patients and tunica vaginalis flap is an excellent intermediate layer to cover the *** preoperative counseling is particularly essential in patients where the external urinary meatus can be created at coronal or subglanular level.

关键词： Hypospadias Chordee Neourethra Tunica vaginalis flap

Intricacies during pregnancy with gestational diabetes mellitus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第1期13卷 62-64页

作者： Richa rattan Rimesh Pal Parul Chawla Gupta Arvind Kumar Morya Ripunjay Prasad Department of Endocrinology Post Graduate Institute of Medical Education and ResearchChandigarh 160012India Department of Ophthalmology Post Graduate Institute of Medical Education and ResearchChandigarh 160012PunjabIndia Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Ophthalmology RP Eye InstituteDelhi 110001India

The study by Cao et al aimed to identify early second-trimester biomarkers that could predict gestational diabetes mellitus(GDM)development using advanced proteomic techniques,such as Isobaric tags for relative and absolute quantitation isobaric tags for relative and absolute quantitation and liquid chromatography-mass spectrometry liquid chromatography-mass *** analysis revealed 47 differentially expressed proteins in the GDM group,with retinol-binding protein 4 and angiopoietin-like 8 showing significantly elevated serum levels compared to *** these findings are promising,the study is limited by its small sample size(n=4 per group)and lacks essential details on the reproducibility and reliability of the protein quantification methods ***,the absence of experimental validation weakens the interpretation of the protein-protein interaction network identified through bioinformatics *** study's focus on second-trimester biomarkers raises concerns about whether this is a sufficiently early period to implement preventive interventions for *** GDM risk during the first trimester or pre-conceptional period may offer more clinical *** its limitations,the study presents valuable insights into potential GDM biomarkers,but larger,well-validated studies are needed to establish their predictive utility and generalizability.

关键词： Gestational diabetes mellitus Biomarkers Differentially expressed proteins Retinol-binding protein 4 Angiopoietin-like 8 Proteomics Lifestyle interventions Early prediction

Potential of conservation tillage and altered land configuration to improve soil properties,carbon sequestration and productivity of maize based cropping system in eastern Himalayas,India

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Soil and Water Conservation Research 2021年第2期9卷 279-290页

作者： Gulab Singh Yadav Anup Das Subhash Babu kamal Prasad Mohapatra rattan Lal Dipjyoti Rajkhowa Indian Council of Agricultural Research(ICAR) Research Complex for North Eastern HillRegionTripura CentreTripuraIndia ICAR eIndian Agricultural Research Institute New DelhiIndia ICAR-National Bureau of Plant Genetic Resources New DelhiIndia Carbon Management and Sequestration Center Ohio State UniversityColumbusUSA ICAR Research Complex for NEH Region Nagaland CentreNagalandIndia

Poor soil properties especially low soil organic carbon(SOC)and nutrient and water retention capacities are major concern for sustainable agriculture in *** experiments were conducted to assess the effects of six combinations of tillage[conventional tillage(CT)and no-till(NT)]and land configurations[flat bed planting(FB),ridge and furrow planting(RF),and raised bed planting(RB)]on productivity and carbon(C)-sequestration potential of maize[(Zea mays L.)for green-cob in summer]-maize(for grains in rainy season)-field pea[(Pisum sativum *** winter]cropping system under humid mildtropical climate of Tripura,*** maize under NT-FB in 2012 and NT-RF in 2013 produced significantly higher green cob yield than that under ***,in rainy season,CT produced higher maize grain yield than NT *** pea seed yield was significantly the highest under *** two cropping cycles,NT systems had higher available N,P,K and 18.6e31.4%higher soil moisture content after rainy season maize than CT *** highest SOC-stock(0e30 cm)was observed under NT-FB,whereas,SOC-sequestration rate was maximum under NT-RB(0.85 Mg ha1 year1).Therefore,NT based systems can enhance the productivity and improve SOC-sequestration in cultivated soils of eastern ***,study recommended adoption of NT-RB/NT-FB to raise maize-maize-field pea system for improving productivity,improving C-sequestration and soil properties in the eastern Himalayas and similar eco-regions elsewhere.

关键词： Soil fertility Carbon sequestration Soil moisture Low productivity Hill ecosystem

Carbon farming by recarbonization of agroecosystems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2023年第5期33卷 676-679页

作者： rattan LAL CFAES rattan Lal Center for Carbon Management and Sequestration The Ohio State UniversityColumbus OH 43210USA

Carbon(C)farming refers to deliberate adoption of restorative land use and site-specific best management practices which create a positive soil/ecosystem C budget and lead to sequestration of atmospheric carbon dioxide(CO_(2))in soil and biomass such that increase in soil/terrestrial C stock can generate another income stream for land ***-based C sequestration can be in biomass(above-and belowground)and increase in soil C *** latter comprises of soil inorganic C(SIC)and soil organic C(SOC)*** of C as SIC pool is through formation of secondary carbonates and leaching of bicarbonates with irrigation water.

关键词： soil income budget

Sustainable intensification of China's agroecosystems by conservation agriculture

在线全文

学校读者我要写书评

暂无评论

International Soil and Water Conservation Research 2018年第1期6卷 1-12页

作者： rattan Lal Carbon Management and Sequestration Center The Ohio State University Columbus OH 43210 USA

Agriculture in China started about 8000 BCE with cultivation of millet and rice. Thus, China's modern agriculture is rooted in a long evolutionary history of agricultural practices. China's population of 211 million in 1700 increased to 295 million in 1800, 400 million in 1900, 1266 million in 2000, and is 1409 million in 2017. Thus, China has to feed 18.5% of the world population on merely 7% of the world's arable land and with even scarcer water resources. Yet, between 1950 and 2017, the grain production in China increased at a faster rate than that of the population. Total grain production (million ton or Tg) was 113 in 1949, 305 in 1970, 462 in 2000, and 603 in 2015. The high agricultural productivity is attributed to high consumption of fertilizers (58.8 Tg in 2015), pesticides (1.81 Tg in 2014), and irrigation (65.7 Mha in 2014). However, the high production is also associated with the severe problems of soil degradation (erosion), water contamination and air pollution. It is estimated that ~40% of China's arable land is degraded to some degree. Thus, there is a strong need for a paradigm shift of sustaining high productivity while restoring quality of natural resources of soil, water and air. In this context, conversion to a systembased conservation agriculture (CA) may be an important strategy of sustainable intensification of agroecosystems for advancing and sustaining high production while restoring soil health, purifying water and air and improving the environment. The CA has been practiced in China since 1990s and was adopted on ~8.0 Mha in 2015. The available literature shows that conversion to CA increases soil organic C (SOC) concentration and stocks mostly in the surface layer while also producing an equivalent agronomic yield. Therefore, a widespread adoption of CA in China would necessitate a deeper understanding of its ecological underpinnings. To be effective, site-specific CA practices must reduce risks of soil erosion under dry land farming, ac

关键词： soil conservation food security water scarcity ancient agriculture environmental pollution

Effects of molecular weight and concentration of carboxymethyl cellulose on morphology of hydroxyapatite nanoparticles as prepared with one-step wet chemical method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2015年第5期9卷 804-812页

作者： Ruiqiang LIU rattan LAL Carbon Management & Sequestration Center School of Environment & Natural Resources the Ohio State University Columbu OH 43210 USA

Nano-sized apatite particles （nAP） synthesized with carboxymethyl cellulose （CMC） have shown great application potentials in in situ heavy metal remediation. However, differences in CMC＇s properties effects on the size of nAP produced are not well understood. In this paper, two types of CMC, with respective molecular weights （MW） of-120000 and -240000 Dalton or respective polymerization degrees of 500 （CMC-500） and 1050 （CMC-1050）, were studied in a concentration range of 0.05%-0.5% （w/w） for nAP synthesis. Morphology of the particles was characterized with transmission electron microscopy （TEM）. Results showed that 0.05% CMC- 500 solution gave an average particle size o f 148.7 -4-134.9 rim, 0.25% CMC-500 solution produced particles of 21.8~20.4nm, and, 0.5% CMC-500 solution contained particles of 15.8-4-7.7nm. In comparison, 0.05% CMC- 1050 solution produced nanoparticles of 6.8~3.2 rim, 0.25% CMC-1050 produced smaller nAP of 4.3-1-3.2 nm, and 0.5% CMC-1050 synthesized the smallest nanoparti- cles in this study, with an average diameter of 3.0~2.1 nm. Chemical composition of the products was identified with X-ray diffraction （XRD） as pure hydroxyapatite. Interac- tions between nAP and CMC were discussed with help of attenuated total reflection Fourier transform infrared （ATR- FTIR） spectroscopic data. This study showed that CMC at higher concentration as well as higher MW facilitated to produce finer nanoparticles, showing that nAP size could be manipulated by selecting appropriate CMC MW and/or applying appropriate CMC concentration.

关键词： nanotechnology nanoparticles apatite carboxymethyl cellulose (CMC) particle size

Managing soil quality for humanity and the planet

在线全文

学校读者我要写书评

暂无评论

Frontiers of Agricultural Science and Engineering 2020年第3期7卷 251-253页

作者： rattan LAL Carbon Management and Sequestration Center The Ohio State UniversityColumbusOH 43210USA

Rather than a human-centric, the basic strategy of achieving Sustainable Development Goals mustbe focused on restoring and sustaining planetary processes. The urgency of meeting the demands of thehumanity must be reconciled with the necessity of enhancing the environment. Increasing and restoring soilorganic matter content of the degraded and depleted soils is critical to strengthening planetary processes.

关键词： soil quality humanity planet climate change soil carbon sequestration food and nutritional security

Soil conservation and ecosystem services

在线全文

学校读者我要写书评

暂无评论

International Soil and Water Conservation Research 2014年第3期2卷 36-47页

作者： rattan Lal Carbon Management&Sequestration Center 210 Kottman Hall2021 Coffey RoadThe Ohio State UniversityColumbusOhio 43210USA

Accelerated soil erosion,driven by anthropogenic activities such as conversion of natural ecosystems to agroecosystems and mechanical tillage,has numerous adverse impacts on ecosystem *** addition to degrading soil quality and reducing agronomic/biomass productivity on-site through a decrease in use-efficiency of inputs,off-site impacts of accelerated erosion include eutrophication and contamination,sedimentation of reservoirs and waterways,and emissions of greenhouse gases(e.g.,CO_(2),CH_(4) and N_(2)O).While advancing food and nutritional security,adoption of restorative land use and recommended management practices are important to strengthening numerous ecosystem services such as improving water quality and renewability,increasing below and above-ground biodiversity,enhancing soil resilience to climate change and extreme events,and mitigating climate change by sequestering C in soil and reducing the emission of CO_(2),CH_(4) and N_(2)*** effective control of accelerated erosion is essential to sustainable development and improving the environment.

关键词： Gaseous emission Climate change mitigation Sustainable development Accelerated soil erosion Geologic erosion Food security Eutrophication Sedimentation Water quality Biodiversity

Effects of Tillage Practices and Land Use Management on Soil Aggregates and Soil Organic Carbon in the North Appalachian Region,USA

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2017年第1期27卷 172-176页

作者： Arun Jyoti NATH rattan LAL Carbon Management and Sequestration Center Ohio State University Department of Ecology and Environmental Science Assam University

Promoting soil carbon sequestration in agricultural land is one of the viable strategies to decelerate the observed climate changes. However, soil physical disturbances have aggravated the soil degradation process by accelerating erosion. Thus, reducing the magnitude and intensity of soil physical disturbance through appropriate farming/agricultural systems is essential to management of soil carbon sink capacity of agricultural lands. Four sites of different land use types/tillage practices, i） no-till （NT） corn （Zea mays L.）（NTC）, ii） conventional till （CT） corn （CTC）, iii） pastureland （PL）, and iv） native forest （NF）, were selected at the North Appalachian Experimental Watershed Station, Ohio, USA to assess the impact of NT farming on soil aggregate indices including water-stable aggregation, mean weight diameter （MWD） and geometric mean diameter （GMD）, and soil organic carbon and total nitrogen contents. The NTC plots received cow manure additions （about 15 t ha-1） every other year. The CTC plots involved disking and chisel ploughing and liquid fertilizer application （110 L ha-l）. The results showed that both water-stable aggregation and MWD were greater in soil for NTC than for CTC. In the 0-10 cm soil layer, the 〉 4.75-mm size fraction dominated NTC and was 46% more than that for CTC, whereas the 〈 0.25-mm size fraction was 380% more for CTC than for NTC. The values of both MWD and GMD in soil for NTC （2.17 mm and 1.19 mm, respectively） were higher than those for CTC （1.47 and 0.72 mm, respectively） in the 0-10 cm soil layer. Macroaggregates contained 6%-42% and 13%-43% higher organic carbon and total nitrogen contents, respectively, than microaggregates in soil for all sites. Macroaggregates in soil for NTC contained 40% more organic carbon and total nitrogen over microaggregates in soil for CTC. Therefore, a higher proportion of microaggregates with lower organic carbon contents created a carbon-depleted environment for CTC. In contrast, soil for NTC had mor

关键词： aggregate stability macroaggregates microaggregates no-till water-stable aggregation