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Dominant species of mid-elevation grasslands of the uKhahlamba-Drakensberg Park are predicted to be largely immune to climate change

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山地科学学报(英文) 2023年第9期20卷 2468-2486页

作者： debbie jEWITT Craig D.MOrrIS Tim G.O’CONNOr Michelle j.TEDDEr Ezemvelo KZN Wildlife Scientific ServicesPO Box 13053Cascades 3202South Africa School of Animal Plant and Environmental SciencesUniversity of the WitwatersrandJohannesburgPrivate Bag X3WITS 2050South Africa Agricultural research Council-Animal Production(ArC-AP) ℅School of Life Sciences University of KwaZulu-NatalPrivate Bag X01Scottsville 3209PietermaritzburgSouth Africa School of Life Sciences University of KwaZulu-NatalPrivate Bag X01Scottsville 3209PietermaritzburgSouth Africa

Anticipating global change impact on natural vegetation,especially in poorly researched systems,requires an understanding of the environmental factors that most strongly influence the organisation of plant communities at different *** environmental relations of plant communities in the Drakensberg mountains of South Africa remain poorly *** study investigated the influence of selected environmental determinants on the dominant species of plant community organisation in this *** order to provide an overview of the influence of the environment on botanical composition and plant diversity,this study,conducted as four discrete exercises,investigated the interplay of altitude,aspect and slope on the abundance of selected species,and to examine the influence of latitude,geological substrate and local topography on species *** diversity showed no pattern of response to investigated environmental *** composition was related to temperature and solarradiation *** altitude sites facing east were distinct for non-graminoid *** and latitude exerted a pronounced effect on species composition,confounded by longitude and precipitation *** substrate,in concert with slope steepness and orientation,influenced composition,restricting the abundance but not distribution of some *** individualistic responses were found for C_3,C_4,and non-graminoid species in relation to altitude,slope and *** and aspect mediate the effects of altitude and hence temperature for some *** study has demonstrated the complexity of drivers influencing species and compositional distribution in the Drakensberg and permits a preliminary consideration of potential changes in the composition and dominance structure of mid-elevation grasslands in response to climate *** dominant grass species were widespread across environmental gradients,occupying currently warm,cool,moist and dry habitats

关键词： Drakensberg Environmental gradients Grasslands Mountain biodiversity Vegetation

Acupuncture Forbidden Points for Low Back Pain in Pregnancy: A Literature review Synthesis

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journal of Acupuncture and Tuina Science 2014年第2期12卷 114-124页

作者： debbie r.rodriguez Lawrence j.ryan Yo San University of Traditional Chinese Medicine

There has long been a controversy whether forbidden points truly exist, or if they have any bearing in contemporary practice. This study used literature review synthesis method to examine the application of acupuncture at the "forbidden points" for low back pain and pelvic pain in pregnancy. This study addresses the potential implications of needling the forbidden points during pregnancy.

关键词：针灸治疗怀孕腰骶部疼痛点,禁止 r246.2

NEAr-INFrArED,BrOAD-BAND SPECTrAL IMAGING OF THE HUMAN BrEAST FOr QUANTITATIVE OXIMETrY:APPLICATIONS TO HEALTHY AND CANCErOUS BrEASTS

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journal of Innovative Optical Health Sciences 2010年第4期3卷 267-277页

作者： YANG YU ANGELO SASSArOLI debbie K.CHEN MArC j.HOMEr rOGEr A.GrAHAM SErGIO FANTINI Department of Biomedical Engineering Tufts University 4 Colby StreetMedfordMA 02155USA Tufts Medical Center Department of Radiology 800 Washington StreetBostonMA 02111USA Tufts Medical Center Department of Surgery 800 Washington StreetBostonMA 02111USA

We have examined ten human subjects with a previously developed instrument for near-infrared diffuse spectral imaging of the female *** instrument is based on a tandem,planar scan of two collinear optical fibers(one for illumination and one for collection)to image a gently compressed breast in a transmission *** optical data collection features a spatial sampling of 25 points/cm2 over the whole breast,and a spectral sampling of 2 points/nm in the 650-900nm wavelength *** the ten human subjects examined,eight are healthy subjects and two are cancer patients with unilateral invasive ductal carcinoma and ductal carcinoma in situ,*** each subject,we generate second-derivative images that identify a network of highly absorbing structures in the breast that we assign to blood vessels.A previously developed paired-wavelength spectral method assigns oxygenation values to the absorbing structures displayed in the second-derivative *** resulting oxygenation images feature average values over the whole breast that are significantly lower in cancerous breasts(69±14%,n=2)than in healthy breasts(85±7%,n=18)(prthermore,in the two patients with breast cancer,the average oxygenation values in the cancerous regions are also significantly lower than in the remainder of the breast(invasive ductal carcinoma:49±11%vs 61±16%,prcinoma in situ:58±8%vs 77±11%,p<0.001).

关键词： Diffuse spectral imaging near-infrared spectroscopy optical mammography oximetry hemoglobin saturation

Accommodating the bacterial decoding release factor as an alien protein among the rNAs at the active site of the ribosome

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Cell research 2007年第7期17卷 591-607页

作者： Elizabeth S Poole David j Young Marjan E Askarian-Amiri debbie-jane G Scarlett Warren P Tate Department of Biochemistry University of OtagoP.O.Box 56 DunedinNew Zealand

The decoding release factor (rF) triggers termination of protein synthesis by functionally mimicking a trNA to spanthe decoding centre and the peptidyl transferase centre (PTC) of the ribosome. Structurally, it must fit into a site craftedfor a trNA and surrounded by five other rNAs, namely the adjacent peptidyl trNA carrying the completed polypeptide,the mrNA and the three rrNAs. This is achieved by extending a structural domain from the body of the protein thatresults in a critical conformational change allowing it to contact the PTC. A structural model of the bacterial terminationcomplex with the accommodated rF shows that it makes close contact with the first, second and third bases of the stopcodon in the mrNA with two separate loops of structure: the anticodon loop and the loop at the tip of helix α5. Theanticodon loop also makes contact with the base following the stop codon that is known to strongly influence termina-tion efficiency. It confirms the close contact of domain 3 of the protein with the key rNA structures of the PTC. ThemrNA signal for termination includes sequences upstream as well as downstream of the stop codon, and this may reflectstructural restrictions for specific combinations of trNA and rF to be bound onto the ribosome together. An unbiasedSELEX approach has been investigated as a tool to identify potential rrNA-binding contacts of the bacterial rF in itsdifferent binding conformations within the active centre of the ribosome.

关键词： release factor protein synthesis termination trNA functional mimicry molecular mimicry SELEX ribosome

Diverse morphologies of zinc oxide nanoparticles and their electrocatalytic performance in hydrogen production

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journal of Energy Chemistry 2021年第5期30卷 162-170页

作者： Veronica M.Sofianos junqiao Lee debbie S.Silvester Pralok K.Samanta Mark Paskevicius Niall j.English Craig E.Buckley Department of Physics and Astronomy Fuels and Energy Technology InstituteCurtin UniversityPerthBentley 6102Australia University College Dublin School of Chemical and Bioprocess EngineeringBelfieldDublin 4Ireland Curtin Institute for Functional Moleailes and Interfaces School of Molecular and Life SciencesCurtin UniversityPerthBentley 6102Australia

Hydrogen is considered an attractive alternative to fossil fuels,but only a small amount of it is produced from renewable energy,making it not such a clean energy carrier after *** hydrogen through water electrolysis is promising,but using a cost-effective and high-performing catalyst that has longterm stability is still a *** study exploits,for the first time,the potential of zinc oxide nanoparticles with diverse morphologies as catalysts for the electrocatalytic production of hydrogen from *** morphology of the nanoparticles(wires,cuboids,spheres)was easily regulated by changing the concentration of sodium hydroxide,used as the shape controlling agent,during the *** spherical morphology exhibited the highest electrocatalytic activity at the lowest potential *** spherical nanoparticles had the highest number of oxygen vacancies and lowest particle size compared to the other two morphologies,features directly linked to high catalytic ***,the nanowires were much more stable with repeated ***-functional theory showed that the presence of oxygen vacancies in all three morphologies led to diminished band gaps,which is of catalytic interest.

关键词： ZnO nanoparticles Nanocatalysts Electrocatalysis Hydrogen production Water splitting

Effect of a novel dietary supplement on pH levels of healthy volunteers:a pilot study

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journal of Integrative Medicine 2013年第6期11卷 384-388页

作者： Stephen Douglas Anton Xiaomin Lu Ginny Bank Kacey Heekin debbie Saha Pamela j.Dubyak Heather Ann Hausenblas Department of Aging and Geriatric research University of Florida Department of Clinical and Health Psychology University of Florida Department of Biostatistics University of Florida rFI Ingredients Department of Sport and Exercise Sciences University of Florida Department of Sport and Exercise Sciences Jacksonville University

OBjECTIVE： To examine the effects of a greens alkalizing dietary supplement on urinary pH levels in individuals with lower-than-average pH levels. METHODS： The present study investigated the effects of an alkalizing formula （reserveage Wholeganic GreensTM） on four individuals who had average urinary pH levels below 6.0 for three consecutive days. Following the three-day, baseline period, participants received reserveage Wholeganic GreensTM for four consecutive days and were instructed to continue to measure their urine pH levels. Paired samples t-tests were used to examine pH levels before and after a four-day treatment period with reserveage Wholeganic GreensTM. rESULTS： Compared to baseline, mean urine pH levels in all volunteers were significantly higher following the supplementation with reserveage Wholeganic GreensTM （5.89 ±0.20 vs 5.56 ± 0.23; P〈0.01）. Participants＇ pH levels were also significantly higher than baseline on days 5, 6, and 7 of the treatment period （P 〈 0.05）. Noteworthy, on day 7, participants＇ mean pH levels were significantly higher than at the beginning of the treatment period （6.03 ± 0.15 at day 7 vs 5.65 ± 0.24 at day 4; P 〈 0.01）. CONCLUSION： The findings of this study suggest that supplementation with reserveage Wholeganic GreensTM has an alkalizing effect on the body and can increase the urine pH levels in individuals with lower-than-average pH levels.

关键词： dietary supplements urinalysis acidosis pilot study

Pathophysiology of cerebral oedema in acute liver failure

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World journal of Gastroenterology 2013年第48期19卷 9240-9255页

作者： Teresa r Scott Victoria T Kronsten robin D Hughes debbie L Shawcross Institute of Liver Studies King’s College London School of Medicine at King’s College Hospital King’s College Hospital London SE5 9RS United Kingdom

Cerebral oedema is a devastating consequence of acute liver failure(ALF)and may be associated with the development of intracranial hypertension and *** ALF,some patients may develop cerebral oedema and increased intracranial pressure but progression to lifethreatening intracranial hypertension is less frequent than previously described,complicating less than one third of cases who have proceeded to coma since the advent of improved clinical *** rapid onset of encephalopathy may be dramatic with the development of asterixis,delirium,seizures and *** and vasogenic oedema mechanisms have been implicated with a preponderance of experimental data favouring a cytotoxic *** swelling is the most consistent neuropathological finding in humans with ALF and ammonia plays a definitive role in the development of cytotoxic brain *** mechanism(s)by which ammonia induces astrocyte swelling remains unclear but glutamine accumulation within astrocytes has led to the osmolyte *** evidence also supports an alternate‘Trojan horse’hypothesis,with glutamine as a carrier of ammonia into mitochondria,where its accumulation results in oxidative stress,energy failure and ultimately astrocyte *** a complete breakdown of the blood-brain barrier is not evident in human ALF,increased permeation to water and other small molecules such as ammonia has been demonstrated resulting from subtle alterations in the protein composition of paracellular tight *** present,there is no fully efficacious therapy for cerebral oedema other than liver transplantation and this reflects our incomplete knowledge of the precise mechanisms underlying this process which remain largely unknown.

关键词： Cerebral oedema Acute liver failure Ammonia Hepatic encephalopathy Intracranial pressure Intracranial hypertension Cerebral blood flow

Gastric cancer in Alaska Native people: A cancer health disparity

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World journal of Gastroenterology 2018年第25期24卷 2722-2732页

作者： Holly A Martinson Nancy j Shelby Steven r Alberts Matthew j Olnes WWAMI School of Medical Education University of Alaska Anchorage Department of Oncology Mayo Clinic Cancer Center Hematology and Medical Oncology Department Alaska Native Medical Center

AIM To evaluate recent trends in gastric cancer incidence, response to treatment, and overall survival among Alaska Native(AN) people. METHODS A retrospective analysis of the Alaska Native Medical Center patient database was performed. Patient history, clinical, pathological, response to treatment and patient outcomes were collected from one-hundred and thirty-two AN gastric cancer patients. The Surveillance, Epidemiology and End result database 18 was used to collect comparison United States non-Hispanic White(NHW) and AN gastric cancer patient data between *** AN gastric cancer patients have a higher incidence rate, a poorer overall survival, and are diagnosed at a significantly younger age compared to NHW patients. AN patients differ from NHW patients in greater prevalence of non-cardia, diffuse subtype, and signet ring cell carcinomas. AN females were more likely to be diagnosed with later stage cancer, stage IV, compared to AN males. Diminished overall survival was observed among AN patients with increasing stage, O+ blood type, resection, and no treatment. This study is the first report detailing the clinicopathologic features of gastric cancer in AN people with outcome *** Our findings confirm the importance of early detection, treatment, and surgical resection for optimizing AN patient outcomes. Further research on early detection markers are warranted.

关键词： Alaska Native gastric cancer Helicobacter pylori gender health disparities

Silicon carbide resonant tuning fork for microsensing applications in high-temperature and high G-shock environments

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Engineering Sciences 2012年第5期10卷 36-41页

作者： David r Myers Kan Bun Cheng Babak jamshidi robert G Azevedo debbie G Senesky Li Chen Mehran Mehregany Muthu B j Wijesundara Albert P Pisano Department of Mechanical Engineering Berkeley Sensor and Actuator Center University of CaliforniaBerkeley California 94720USA Department of Electrical Engineering and Computer Science Cleveland Case Western Reserve University Cleveland Ohio 44106 USA)

We present the fabrication and testing of a silicon carbide(SiC)balanced mass double-ended tuning fork that survives harsh environments without compromising the device strain sensitivity and resolution *** device features a material stack that survives corrosive environments and enables high-temperature *** perform high-temperature testing,a specialized setup was constructed that allows the tuning fork to be characterized using traditional silicon *** tuning fork has been operated at 600 ℃ in the presence of dry steam for short *** tuning fork has also been tested to 64 000 G using a hard-launch,soft-catch shock implemented with a light gas ***,the device still has a strain sensitivity of 66 Hz/με and strain resolution of 0.045 με in a 10 kHz *** such,this balanced-mass double-ended tuning fork can be used to create a variety of different sensors including strain gauges,accelerometers,gyroscopes,and pressure *** the adaptable fabrication process flow,this device could be useful to micro-electro-mechanical systems(MEMS) designers creating sensors for a variety of different applications.

关键词：高温作业应用程序 G-SHOCK 硅谐振碳化硅音叉环境压力传感器