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Advances in Tropical Soil Characterization via Portable X-Ray Fluorescence Spectrometry

Pedosphere 2019年第4期29卷 468-482页

作者： Elen A. SILVA David C. WEINDORF Sergio H. G. SILVA Bruno T. RIBEIRO Giovana C. POGGERE Teotonio S. CARVALHO mariana G. m. GONQALVES Luiz R. G. GUILHERmE Nilton CURI Department of Soil Science Federal University of Lavras Lavras 37200-000 (Brazil) Department of Plant and Soil Science Texas Tech University Texas 79409-2122 (USA)

Portable X-ray fluorescence(pXRF) spectrometers can be used to determine the elemental composition easily, rapidly, and without using chemical reagents, which is very important for tropical regions due to the lack of detailed soil characterization data. moreover,pXRF data can be used to predict the results of more expensive, time-consuming, and conventional laboratory analyses. This study sought to determine the elemental composition of various soil profiles using pXRF. Two operational modes(Trace mode and General mode) and two scanning time(30 and 60 s) were assessed to determine their effects on the correlation of pXRF dataset with respect to conventional inductively coupled plasma(ICP)-optical emission spectrometry analysis. This relationship has been reported in previous studies, however, few studies were performed on tropical soils, which are unique. Furthermore, such relationships establish the viability of developing prediction models directly from pXRF data. Linear regression was applied to develop calibration models for the prediction of ICP analysis results and exchangeable and available elemental contents based on pXRF data. High coefficients of determination(R^2) were obtained for Ca(0.87), Cu(0.90), Fe(0.95), mn(0.85), Cr(0.95), V(0.72), and Ni(0.90), with adequate validation. Statistically significant results were not found for Al, K, Zn, Ti, and Zr. The models predicting the exchangeable Ca based on the total Ca from p XRF reached an R^2 of up to 0.85. Operational modes influenced the pXRF results. Our results illustrate that pXRF holds great promise for tropical soil characterization and the development of prediction models, justifying the need for larger-scale studies in tropical countries worldwide.

关键词： elemental composition exchangeable Ca inductively coupled plasma operational mode prediction models scanning time soil analysis total elemental content

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Influence of FCA Welding Process Parameters on Distortion of 409m Stainless Steel for Rail Coach Building

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Journal of Iron and Steel Research International 2013年第1期20卷 71-78页

作者： m V Venkatesan N murugan B m Prasad A manickavasagam Department of mechanical Engineering Coimbatore Institute of TechnologyCoimbatore 641014TNIndia Integral Coach Factory Indian RailwaysChennai 600038TNIndia

The influence of flux cored arc welding （FCAW） process parameters such as welding current, travel speed, voltage and CO2 shielding gas flow rate on bowing distortion of 409m ferritic stainless steel sheets of 2 mm in thickness was discussed. The bowing distortions of the welded plates were measured using a simple device called profile tracer. An experimental regression equation was developed to predict the bowing distortion and with this equation, it is easy to select optimized process parameters to achieve minimum bowing distortion. It is revealed that the FCAW process parameters have significant influence on bead profile and the bowing distortion.

关键词： bowing distortion ferritic stainless steel flux cored arc welding statistical model rail coach distortion measurement

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Complement-dependent neuroinflammation in spinal cord injury:from pathology to therapeutic implications

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Neural Regeneration Research 2025年第5期20卷 1324-1335页

作者： Hassan Saad Bachar El Baba Ali Tfaily Firas Kobeissy Juanmarco Gutierrez Gonzalez Daniel Refai Gerald R.Rodts Christian mustroph David Gimbel Jonathan Grossberg Daniel L.Barrow matthew F.Gary Ali m.Alawieh Department of Neurosurgery Emory University School of MedicineAtlantaGAUSA Department of Neurology Yale UniversityNew HavenCTUSA Center for Neurotrauma Multiomics&Biomarkers(CNMB)Morehouse School of MedicineAtlantaGAUSA

Spinal cord injury remains a major cause of disability in young adults,and beyond acute decompression and rehabilitation,there are no pharmacological treatments to limit the progression of injury and optimize recovery in this *** the thorough investigation of the complement system in triggering and propagating cerebral neuroinflammation,a similar role for complement in spinal neuroinflammation is a focus of ongoing *** this work,we survey the current literature investigating the role of complement in spinal cord injury including the sources of complement proteins,triggers of complement activation,and role of effector functions in the *** study relevant data demonstrating the different triggers of complement activation after spinal cord injury including direct binding to cellular debris,and or activation via antibody binding to damage-associated molecular *** effector functions of complement have been implicated in spinal cord injury,and we critically evaluate recent studies on the dual role of complement anaphylatoxins in spinal cord injury while emphasizing the lack of pathophysiological understanding of the role of opsonins in spinal cord *** this pathophysiological review,we systematically review the different translational approaches used in preclinical models of spinal cord injury and discuss the challenges for future translation into human *** review emphasizes the need for future studies to dissect the roles of different complement pathways in the pathology of spinal cord injury,to evaluate the phases of involvement of opsonins and anaphylatoxins,and to study the role of complement in white matter degeneration and regeneration using translational strategies to supplement genetic models.

关键词： complement neuroinflammation neuroplasticity regeneration spinal cord injury targeted therapy

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Holmium Oxide Film as a Saturable Absorber for 2μm Q-Switched Fiber Laser

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Chinese Physics Letters 2017年第5期34卷 48-51页

作者： m.F.A.Rahman m.F.m.Rusdi m.Q.Lokman m.B.H.mahyuddin A.A.Latiff A.H.A.Rosol K.Dimyati S.W.Harun Department of Electrical Engineering University of Malaya Kuala Lumpur 50603 Malaysia Photonics Research Centre University of Malaya Kuala Lumpur 50603 Malaysia Faculty of Electrical Engineering University Teknologi Mara Shah Alam 40450 Malaysia

This work reports on the use of the holmium oxide （Ho2O3） polymer film as a saturable absorber （SA） for generating stable Q-switching pulses operating in a 2μm region in a thulium-doped fiber laser cavity. The SA is prepared by diluting a commercial Ho3O2 powder and then mixing it with polyvinyI alcohol （PVA） solution to form a Ho2O3-PVA film. A tiny part of the film about 1mm×1 mm in size is sandwiched between two fiber ferrules with the help of index matching gel. When incorporated in a laser cavity driven by a 1552-nm pump, stable Q-switching pulses are observed at 1955nm within the pump power range of 363 491 roW. As the pmnp power increases within this range, the repetition rate rises from 26 kHz to 39 kHz, as the pulse width drops from 4.22μs to 2.57μs. The laser operates with a signal-to-noise ratio of 47dB, and the maximum output power and the pulse energy obtained are 2.67mW and 69ng, respectively. Our results successfully demonstrate that the Ho2O3 film can be used as a passive SA to generate a 2μm pulse laser.

关键词： m Q-Switched Fiber Laser SA FESEm

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采用新技术的冷轧机现代化改造

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国外钢铁 1989年第3期14卷 61-68页

作者： vale.,m. 李凤翔

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metabolic Adaptations Due to the Inclusion of Pasture in the Diet of Dairy Cows Fed Total mixed Ration during Early Lactation

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Open Journal of Animal Sciences 2017年第2期7卷 127-140页

作者： Ana Laura Astessiano Ana meikle Pablo Chilibroste Diego Antonio mattiauda m. Fajardo mariana Carriquiry Facultad de Agronomía Universidad de la República Montevideo Uruguay Facultad de Veterinaria Universidad de la República Montevideo Uruguay

The aim of this study was to evaluate the metabolic adaptations due to the inclusion of pasture in the diet of dairy cows fed on a total mixed ration (TmR) ad libitum during early lactation. multiparous cows (n=18) were used in a randomized complete block design and were randomly assigned according to parity, BW and BCS to one of two feeding strategies from calving to 60 DIm: 1) cows fed TmR ad libitum (without access to pasture;100% TmR) and 2) cows fed on a mixed system with pasture grazing (6 h of access to paddock in one grazing session, 8:00 to 14:00 h) and supplemented with 50% of ad libitum TmR (Pasture Group, PG). At 61DIm, TmR fed cows were assigned without an adjustment period to a similar feeding and management routine than PG group (Post-TmR), while PG cows remained in their original routine throughout the experiment. Thus, at 61DIm and thereafter, both, PG and Post-TmR cows grazed a second-year pasture and were supplemented with 50% TmR (Dm basis). milk production was determined daily until 80 DIm, and cow BCS and BW were registered and blood samples and liver biopsies were obtained one week before and one week after dietary change (-1 to +1 wk;+55 and +69 DIm). milk yield, BW and BCS did not differ between treatments but decreased or tended to decreased from -1 to +1 wk only in Post-TmR cows. Serum IGF-1 tended to increase in Post-TmR cows. Hepatic expression of IGFBP5 and IGFBP6 mRNA, were greater while IGF1 and IGFBP3 mRNA tended to be greater for Post-TmR than PG cows. Hepatic expression of IGF1, IGFBP5 and IGFBP6 mRNA increased from -1 to +1 wk only in Post-TmR cows. Expression of ACADVL and PDH1A mRNA had a 2-fold increase in both groups from wks -1 to +1. The results confirm that changes in feeding strategy without an adaptation period modified animal metabolism. The inclusion of grazing to cows that were fed TmR during early lactation, increased IGF-1 concentrations and modified hepatic expression of genes related with IGF system and fatty acid

关键词： Turnout to Pasture Hepatic Expression Dairy Cattle

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Awareness of the Importance of Cardiopulmonary Resuscitation Skills Following the Sudden Cardiac Arrest of Damar Hamlin during a Buffalo Bills Game

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Journal of Biosciences and medicines 2023年第6期11卷 161-170页

作者： Puja Sengupta mariana Adieb Simona maksimyan maxim Crasta Lake Erie College of Osteopathic medicine Elmira NY USA

Background: Cardiopulmonary resuscitation (CPR) is a life-saving skill that is often overlooked until a tragic event occurs. A popular NFL player, Damar Hamlin, safety for the Buffalo Bills, suffered a cardiac arrest on January 2, 2023. Due to prompt intervention and CPR, Hamlin survived the arrest and is playing again. This research sought to understand how people respond to this event on the internet. It also seeks to understand how this response can be used to raise CPR awareness. Design and methods: Using Google Trends and Twitter data, we searched, downloaded, and retrospectively analyzed search interests relative to Hamlin’s cardiac arrest for a one-year duration. We searched for related keywords in the United States from march 2022 to march 2023, including “Damar Hamlin”, “sudden cardiac death”, “heart attack”, and “CPR”. Results: There was a significant rise in post-event Google searches that combined the terms “Damar Hamlin” and “SCD” (m = -28898.88, SE = 1537.66;t = 1.62, p Conclusion: Based on the analytics of these platforms, it can be concluded that there were active discussions and an awareness of life-saving skills such as CPR along with Hamlin’s cardiac event by his fans, as demonstrated by the data gathered from these platforms. This can provide us with valuable insight into human behavior and help us leverage this knowledge to promote health.

关键词： Sudden Cardiac Death CPR Heart Attack Damar Hamlin

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Tuberous Sclerosis Complex Associated with Autism Spectrum Features and Bumetanide as a Pharmacological Indication: A Case Report

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Open Journal of Psychiatry 2021年第3期11卷 202-213页

作者： maria Cristina Brió mariana Fazzina melina Chindi Independent Author Buenos Aires Argentina Independent Author Bahia Blanca Argentina

A wide variety of genetic and non-genetic pathologies share serious psychiatric symptoms, which determine a poor quality of life for patients and their families. To evaluate whether bumetanide, a drug initially developed as a diuretic and currently analyzed for a new indication in patients with severe neuropsychiatric pathologies, could improve the disruptive and self-injurious behaviors secondary to Tuberous Sclerosis Complex (TSC) and characteristic of the autistic spectrum the case of this 6-year-old patient is considered. Following preclinical and clinical evidence of the efficacy of bumetanide in Tuberous Sclerosis and other neurodevelopmental disorders, the drug may alleviate the psychiatric manifestations (TAND) of Tuberous Sclerosis pathology. This would allow avoiding the excessive prescription of antipsychotic drugs indicated to control disruptive behaviors. methodology: The Administración Nacional de medicamentos, Alimentos y Tecnología médica (ANmAT) approval was requested for compassionate use since it is not an approved drug in Argentina for this indication. The patient was evaluated with laboratory tests at T0, T1, T2, T3 and T4, corresponding to the basal moments, of 7 days, 30 days, 60 days and 90 days after starting the medication. Likewise, behavior was evaluated with the Aberrant Behavior Checklist (ABC) at the same times described. CARS was used for autistic characteristics and TAND Checklist for psychiatric disorders, both at the beginning. Bumetanide was administered at 1 mg/day and increased to 1.5 mg/day one month after the first dose. Results: We observed, in this case, the primary endpoint, irritability, showed moderate improvement. On the contrary, hyperactivity, attention, sociability and better connection through gaze experienced and evident improvement. Regarding isolation scales and stereotyped behaviors, an important improvement was found after 3 months of treatment with bumetanide, an antagon

关键词： Bumetanide Tuberous Sclerosis Complex Autism Spectrum Disorder Antagonist NKCC1

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Charaeterizability of the Group ~2D_p(3) by its Order Components,Where p≥5 is a Prime Number Not of the Form 2~m+1

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Acta mathematica Sinica,English Series 2008年第7期24卷 1117-1126页

作者： m.R.DARAFSHEH School of mathematics College of ScienceUniversity of TehranTehranIran

The author will prove that the group ^2Dp（3） can be uniquely determined by its order components, where p ≠ 2^m ＋ 1 is a prime number, p ≥ 5. more precisely, if OC（G） denotes the set of order components of G, we will prove OC（G） = OC（^2Dp（3）） if and only if G is isomorphic to ^2Dp（3）. A main consequence of our result is the validity of Thompson＇s conjecture for the groups under consideration.

关键词： prime graph order component linear group

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Can small-scale altitudinal gradients predict spatial and temporal patterns in tropical forests?

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Journal of Forestry Research 2021年第5期32卷 1854-1865页

作者： mariana Caroline moreira morelli Cléber Rodrigo de Souza Jean Daniel morel Vinícius Andrade maia Alisson Borges miranda Santos Kaline Fernandes miranda Rubens manoel dos Santos Forest Sciences Department Federal University of LavrasCampus UniversitárioCx.P.3037LavrasMGCEP 37200-000Brazil Department of Biology Federal University of LavrasCampus UniversitárioLavrasMGCEP 37200-000Brazil

In tropical montane forests,compositional and structural changes are commonly driven by broad-scale altitudinal ***,given the lack of knowledge on small-scale vegetation changes and temporal dynamics,we address the effects of small-scale variations in soil and altitude on tree community structure,temporal dynamics and phylogenetic diversity in a semi-deciduous tropical forest of the Atlantic Forest Domain,southeastern *** 2010 and 2015 we sampled thirty plots of 400 m^(2),set up along an altitudinal gradient between 1000 and 1500 m a.s.I..In each plot,we collected soil samples for chemical and textural *** fitted linear models to test the effects of altitude and soil on community dynamics and phylogenetic *** and soil explained the spatial variation in number of individuals and phylogenetic diversity *** lower to higher altitudes,we found decreasing fertility,increasing tree density and decreasing phylogenetic *** significantly influenced the increases in total biomass(from 240.9 to 255.4 t ha^(-1))and individual biomass(from 0.15 to 0.17 t)recorded in the *** while community temporal dynamics had rates of 1.96%for mortality,1.02%for recruitment,1.61%for biomass loss and 2.81%for biomass gain,none of them were explained by altitude or *** species substitution averaged0.1 in the ***,these results suggest that the small-scale variations in altitude and soil likely determine the conditions and resources that drive community assembly and structure,which are expressed by spatial variations along the altitudinal *** the same time,temporal patterns were not influenced by altitude-related environmental variation,resulting in a similar dynamic behaviour across the gradient,suggesting that broad-scale factors may play a more important role than local ones.

关键词： Fine-scale Semideciduous forests montane forests Dynamic patterns

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