U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Author heller Remove constraint Author: heller Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
Start Over

Search

598  Search Results

« Previous | 1 - 20 of 598 |
Number of results to display per page

Search Results

1. Temporal Gravity Signals in Reprocessed GOCE Gravitational Gradients

Author:
Heller, Betty,   et al.   ; Siegismund, Frank; Pail, Roland; Gruber, Thomas; Haagmans, Roger;     Show all 5 Authors
Source:
Remote Sensing 2020 v.12 no.21
ISSN:
2072-4292
Subject:
Japan; climate; earthquakes; equations; estimation; glaciers; gravity; ice; mass; melting; models; motivation; remote sensing; satellites; signal-to-noise ratio; sounds; temporal variation; Antarctica; Greenland
Abstract:
... The reprocessing of the satellite gravitational gradiometry (SGG) data from the Gravity field and steady-state Ocean Circulation Explorer (GOCE) satellite mission in 2018/2019 considerably reduced the low-frequency noise in the data, leading to reduced noise amplitudes in derived gravity field models at large spatial scales, at which temporal variations of the Earth’s gravity field have their high ...
DOI:
10.3390/rs12213483

2. Pollinator exposure to systemic insecticides and fungicides applied in the previous fall and pre-bloom period in apple orchards

Author:
Heller, Sarah,   et al.   ; Joshi, Neelendra K.; Chen, Jing; Rajotte, Edwin G.; Mullin, Chris; Biddinger, David J.;     Show all 6 Authors
Source:
Environmental pollution 2020 v.265 pp. 114589
ISSN:
0269-7491
Subject:
Halyomorpha halys; Lycorma delicatula; Malus domestica; acetamiprid; active ingredients; acute exposure; acute toxicity; agrochemicals; apples; autumn; clothianidin; crops; cyfluthrin; dinotefuran; ecosystem services; flowers; foraging; honey bees; imidacloprid; insect control; insecticide residues; lambda-cyhalothrin; myclobutanil; nectar; no observed adverse effect level; orchards; pesticide application; pests; pollen; pollen sampling; pollination; pollinators; spring; thiacloprid; thiamethoxam; United States
Abstract:
... Pollinators provide a crucial ecosystem service by pollinating commercially cultivated crops, but they are frequently exposed to various agricultural chemicals used for pest management. In this study, we assessed the potential exposure of pollinators to various systemic insecticides and a fungicide used in apple orchards. Residue levels were determined for the whole flower as well as pollen and ne ...
DOI:
10.1016/j.envpol.2020.114589

3. “Prevention is the biggest success”: Barriers and enablers to personal biosecurity in the thoroughbred breeding industry

Author:
Heller, Jane,   et al.   ; Taylor, Kathryn; Thomas, Susan; Mendez, Diana; Chicken, Catherine; Carrick, Joan; Durrheim, David;     Show all 7 Authors
Source:
Preventive veterinary medicine 2020 v.183 pp. 105135
ISSN:
0167-5877
Subject:
Hendra henipavirus; Thoroughbred; animal technicians; biosecurity; chlamydiosis; climate; disease control; economic factors; foaling; focus groups; health services; horse breeding; horses; human resources; industry; interviews; issues and policy; leadership; managers; medicine; public health; qualitative analysis; risk; safety equipment; veterinarians; working conditions; zoonoses; New South Wales
Abstract:
... Employees in the equine industry are at occupational risk of zoonoses such as Hendra virus and equine chlamydiosis through exposure to infected materials. This study aimed to gain a deeper understanding of the views and experiences of employees, and the key drivers of infection control and personal biosecurity (PB) practices in the Thoroughbred breeding industry. Methods: An exploratory qualitativ ...
DOI:
10.1016/j.prevetmed.2020.105135

4. SnakeMap: four years of experience with a national small animal snake envenomation registry

Author:
Heller, J,   et al.   ; Boller, M; Kelers, K; Stevenson, MA; Winkel, KD; Hardjo, S; Judge, PR; Ong, HM; Padula, AM; Reddrop, C; Santos, LCP; Sharp, CR; Smart, L; Swindells, KL; Tabrett, D; Wierenga, JR;     Show all 16 Authors
Source:
Australian veterinary journal 2020 v.98 no.9 pp. 442-448
ISSN:
0005-0423
Subject:
antivenoms; cats; databases; detection; dogs; epidemiology; hospitals; information; patients; snake bites; snake venoms; snakes; veterinary clinics; Australia
Abstract:
... SnakeMap is a national cloud‐based, veterinary snakebite registry. It was designed to prospectively collect data of the clinical circumstances and temporospatial information on cases of snake envenomation in dogs and cats. We herein introduce the project and summarise the data from the first 4 years of SnakeMap. The registry is a veterinary community‐based online database allowing case entry from ...
DOI:
10.1111/avj.12993

5. Biocompatibility of a Marine Collagen-Based Scaffold In Vitro and In Vivo

Author:
Heller, Snir,   et al.   ; Benayahu, Dafna; Pomeraniec, Leslie; Shemesh, Shai; Rosenthal, Yoav; Rath-Wolfson, Lea; Benayahu, Yehuda;     Show all 7 Authors
Source:
Marine drugs 2020 v.18 no.8
ISSN:
1660-3397
Subject:
alginates; animal models; biocompatibility; biocomposites; blood plasma; blood vessels; cell movement; cell proliferation; collagen; cytotoxicity; fibroblasts; giant cells; granulation tissue; histology; hydrogels; inflammation; macrophages; medical equipment; plasma cells; rats; stem cells; tissue repair
Abstract:
... Scaffold material is essential in providing mechanical support to tissue, allowing stem cells to improve their function in the healing and repair of trauma sites and tissue regeneration. The scaffold aids cell organization in the damaged tissue. It serves and allows bio mimicking the mechanical and biological properties of the target tissue and facilitates cell proliferation and differentiation at ...
DOI:
10.3390/md18080420

6. Comparison of therapeutic efficacy of different drugs against Trypanosoma vivax on experimentally infected cattle

Author:
Heller, Luciana Maffini,   et al.   ; Bastos, Thiago Souza Azeredo; Faria, Adriana Marques; de Assis Cavalcante, Alliny Souza; de Carvalho Madrid, Darling Mélany; Zapa, Dina Maria Beltrán; Nicaretta, João Eduardo; Cruvinel, Leonardo Bueno; Couto, Luiz Fellipe Monteiro; Soares, Vando Edésio; Cadioli, Fabiano Antônio; Lopes, Welber Daniel Zanetti;     Show all 12 Authors
Source:
Preventive veterinary medicine 2020 v.181 pp. 105040
ISSN:
0167-5877
Subject:
Girolando; Trypanosoma vivax; blood; blood sampling; calves; chlorides; diminazene; half life; hematocrit; herds; imidocarb; intravenous injection; isometamidium; males; parasites; polymerase chain reaction; trypanosomiasis; trypomastigotes; Brazil
Abstract:
... In this study, we evaluated the therapeutic efficacy of diminazene diaceturate at a dose of 7 mg/kg (DA), imidocarb dipropionate at 4.8 mg/kg (IMD), isometamidium chloride at 0.5 and 1.0 mg/kg (ISM 0.5 and ISM 1.0) and combinations applied through different methods to treat Trypanosoma vivax in experimentally infected calves. Thirty male Girolando calves were kept indoors and infected intravenousl ...
DOI:
10.1016/j.prevetmed.2020.105040

7. Evaluation of rotational grazing as a control strategy for Rhipicephalus microplus in a tropical region

Author:
Heller, Luciana Maffini,   et al.   ; Nicaretta, João Eduardo; dos Santos, Jordana Belos; Couto, Luiz Fellipe Monteiro; Cruvinel, Leonardo Bueno; de Melo Júnior, Rubens Dias; de Assis Cavalcante, Alliny Souza; Zapa, Dina María Beltrán; Ferreira, Lorena Lopes; de Oliveira Monteiro, Caio Márcio; Soares, Vando Edesio; Lopes, Welber Daniel Zanetti;     Show all 12 Authors
Source:
Research in veterinary science 2020 v.131 pp. 92-97
ISSN:
0034-5288
Subject:
Rhipicephalus microplus; acaricides; cattle; continuous grazing; females; larvae; mathematical models; pastures; rotational grazing; ticks; tropics
Abstract:
... Rhipicephalus microplus is the most significant tick of livestock and its control is particularly challenging due to its resistance to commercial acaricides. Pasture rotation is considered a management strategy that could help control R. microplus, however, the literature only contemplates mathematical models and little is known about the effects of this practice in the field. The objective of thi ...
DOI:
10.1016/j.rvsc.2020.04.006

8. Environmental health conditions in protracted displacement: A systematic scoping review

Author:
Heller, Leo,   et al.   ; Behnke, Nikki L.; Cronk, Ryan; Shackelford, Brandie Banner; Cooper, Brittany; Tu, Raymond; Bartram, Jamie;     Show all 7 Authors
Source:
The Science of the total environment 2020 v.726 pp. 138234
ISSN:
0048-9697
Subject:
air quality; databases; energy; environmental factors; environmental health; food safety; health policy; health services; human rights; hygiene; income; monitoring; parasites; people; politics; respiratory tract diseases; sanitation; sustainable development; urban areas; vector control; waste management; Northern Africa; Sub-Saharan Africa; West Asia
Abstract:
... Adequate environmental health services are critical for human rights, health, and development, especially in the context of forced displacement. There are more than 70 million forcibly displaced persons worldwide, most in protracted situations, having been displaced for more than two years. Some live in camps or informal settlements, but most live in urban areas. Environmental health services are ...
DOI:
10.1016/j.scitotenv.2020.138234

9. A questionnaire study of parasite control in Thoroughbred and Standardbred horses in Australia

Author:
Heller, Jane,   et al.   ; Wilkes, Edwina J. A.; Raidal, Sharanne L.; Woodgate, Robert G.; Hughes, Kristopher J.;     Show all 5 Authors
Source:
Equine veterinary journal 2020 v.52 no.4 pp. 547-555
ISSN:
0425-1644
Subject:
Standardbred; Thoroughbred; anthelmintics; bias; control methods; experimental design; farms; fecal egg count; foals; frequency; grazing management; hygiene; information; lactones; mares; monitoring; objectives; parasites; pastures; questionnaires; selection pressure; testing; Australia
Abstract:
... BACKGROUND: Information regarding parasite control practices currently used on Thoroughbred and Standardbred studs in Australia is lacking. Anthelmintic resistance (AR) is a global problem which has implications for equine health and welfare. OBJECTIVES: To identify parasite control practices currently used on horse studs in Australia and investigate the frequency of use of management factors that ...
DOI:
10.1111/evj.13207

10. Environmental analyses to inform transitions to sustainable diets in developing countries: case studies for Vietnam and Kenya

Author:
Heller, Martin C.,   et al.   ; Walchale, Abhijeet; Heard, Brent R.; Hoey, Lesli; Khoury, Colin K.; De Haan, Stef; Burra, Dharani Dhar; Duong, Thi Thanh; Osiemo, Jamleck; Trinh, Thi Huong; Jones, Andrew D.;     Show all 11 Authors
Source:
The international journal of life cycle assessment 2020 v.25 no.7 pp. 1183-1196
ISSN:
0948-3349
Subject:
Food and Agriculture Organization; beef; case studies; decision making; developing countries; development policy; diet; environmental assessment; environmental impact; environmental performance; food availability; food production; food supply chain; greenhouse gas emissions; imports; life cycle assessment; models; production technology; public health; rice; surveys; sustainable development; uncertainty; water shortages; water stress; wheat; Kenya; Vietnam
Abstract:
... PURPOSE: Sustainable diets are an environmental, economic, and public health imperative, but identifying clear intervention points is challenging. Decision-making will require descriptive analyses from a variety of perspectives, even under the inevitable uncertainty introduced by limited data. This study uses existing data to provide a diet-level perspective on environmental impact from food produ ...
DOI:
10.1007/s11367-019-01656-0

11. Effect of Organic Matter Content on the Spectral Signature of Iron Oxides across the VIS–NIR Spectral Region in Artificial Mixtures: An Example from a Red Soil from Israel

Author:
Heller Pearlshtien, Daniela,   et al.   ; Ben-Dor, Eyal;     Show all 2 Author
Source:
Remote Sensing 2020 v.12 no.12
ISSN:
2072-4292
Subject:
absorbance; air drying; composts; data collection; hematite; reflectance; reflectance spectroscopy; remote sensing; soil; soil organic matter; wavelengths; Israel
Abstract:
... The investigation of iron oxides in soil using spectral reflectance is very common. Their spectral signal is significant across the visible–near infrared (VIS–NIR) spectral range (400–1000 nm). However, this range overlaps with other soil chromophores, such as those for water and soil organic matter (SOM). This study aimed to investigate the effect of different SOM species on red soil from Israel, ...
DOI:
10.3390/rs12121960

12. Development of an efficient numerical model and analysis of heat transfer performance for borehole heat exchanger

Author:
Heller, Alfred,   et al.   ; Yu, Xiaohui; Li, Hongwei; Yao, Sheng; Nielsen, Vilhjalmur;     Show all 5 Authors
Source:
Renewable energy 2020 v.152 pp. 189-197
ISSN:
0960-1481
Subject:
heat exchangers; heat pumps; heat tolerance; heat transfer; mathematical models; renewable energy sources; temperature; Denmark
Abstract:
... Knowledge of borehole heat exchanger efficiency is necessary to optimize the design and performance of ground source heat pump systems. To evaluate the heat transfer performance of the wildly-used vertical U-pipe BHE, a novel one-dimensional numerical model was developed to assess the thermal transfer performance of the BHE from short-term (thermal response test) to long-term (a heating period) fo ...
DOI:
10.1016/j.renene.2020.01.044

13. First Report of Phytophthora heveae Causing Quick Decline of Macadamia in Hawaii

Author:
Heller, W. P.,   et al.   ; Sugiyama, L. S.; Brill, E.; Keith, L. M.;     Show all 4 Authors
Source:
Plant disease 2020 v.104 no.6 pp. 1875
ISSN:
0191-2917
Subject:
Macadamia integrifolia; NAD (coenzyme); NADH dehydrogenase; Phytophthora tropicalis; branches; canopy; cytochrome-c oxidase; decline; defoliation; fungi; fungicides; genes; germplasm; growth chambers; host range; hyphae; internal transcribed spacers; mitochondria; orchards; pathogenicity; pathogens; petioles; phosphopyruvate hydratase; plant litter; quantitative polymerase chain reaction; ribosomal DNA; risk; saplings; seedlings; tree mortality; wilting; zoospores; Hawaii
Abstract:
... Macadamia (Macadamia integrifolia Maiden & Betche) nut production in Hawaii is a $42.0 million industry (USDA-NASS 2019). Macadamia quick decline (MQD), caused by Phytophthora tropicalis Aragaki & J. Y. Uchida, has been a persistent problem in commercial macadamia production in Hawaii since 1986. In the decades to follow thousands of trees have succumbed to MQD (Keith et al. 2010). The development ...
DOI:
10.1094/PDIS-11-19-2451-PDN

14. Zinc Concentration Dynamics Indicate Neurological Impairment Odds after Traumatic Spinal Cord Injury

Author:
Heller, Raban Arved,   et al.   ; Sperl, André; Seelig, Julian; Haubruck, Patrick; Bock, Tobias; Werner, Theresa; Besseling, Albert; Sun, Qian; Schomburg, Lutz; Moghaddam, Arash; Biglari, Bahram;     Show all 11 Authors
Source:
Antioxidants 2020 v.9 no.5
ISSN:
2076-3921
Subject:
X-radiation; X-ray fluorescence spectroscopy; adjuvants; animal injuries; antioxidant activity; blood serum; fluorescence; observational studies; oxidative stress; patient care; patients; regression analysis; remission; spinal cord; zinc
Abstract:
... Traumatic Spinal Cord Injury (TSCI) is debilitating and often results in a loss of motor and sensory function caused by an interwoven set of pathological processes. Oxidative stress and inflammatory processes are amongst the critical factors in the secondary injury phase after TSCI. The essential trace element Zinc (Zn) plays a crucial role during this phase as part of the antioxidant defense syst ...
DOI:
10.3390/antiox9050421

15. Partially shielded enzymes capable of processing large protein substrates

Author:
Heller, Manfred,   et al.   ; Briand, Manon L.; Gebleux, Remy; Richina, Federica; Correro, M. Rita; Grether, Yasmin; Dudal, Yves; Braga-Lagache, Sophie; Beerli, Roger R.; Grawunder, Ulf; Corvini, Philippe F.-X.; Shahgaldian, Patrick;     Show all 12 Authors
Source:
Chemical communications 2020 v.56 no.38 pp. 5170-5173
ISSN:
1364-548X
Subject:
antibodies; chemical bonding; chemical compounds; enzyme activity; proteins; proteolysis; trypsin
Abstract:
... We report the first method of enzyme protection enabling the production of partially shielded enzymes capable of processing substrates as large as proteins. We show that partially shielded sortase retains its transpeptidase activity and can perform bioconjugation reactions on antibodies. Moreover, a partially shielded trypsin is shown to outperform its soluble counterpart in terms of proteolytic k ...
DOI:
10.1039/d0cc01150a

16. Carotenogenesis and chromoplast development during ripening of yellow, orange and red colored Physalis fruit

Author:
Heller, Annerose,   et al.   ; Wen, Xin; Wang, Kunli; Han, Qianyun; Ni, Yuanying; Carle, Reinhold; Schweiggert, Ralf;     Show all 7 Authors
Source:
Planta 2020 v.251 no.5 pp. 95
ISSN:
0032-0935
Subject:
Physalis alkekengi; Physalis peruviana; Physalis pubescens; beta-carotene; beta-cryptoxanthin; bioavailability; biosynthesis; chromoplasts; color; crystallites; diodes; esters; fruits; high performance liquid chromatography; lutein; oranges; ripening; tandem mass spectrometry; transmission electron microscopy; zeaxanthin
Abstract:
... MAIN CONCLUSION: Formation of specific ultrastructural chromoplastidal elements during ripening of fruits of three different colored Physalis spp. is closely related to their distinct carotenoid profiles. The accumulation of color-determining carotenoids within the chromoplasts of ripening yellow, orange, and red fruit of Physalis pubescens L., Physalis peruviana L., and Physalis alkekengi L., res ...
DOI:
10.1007/s00425-020-03383-5

17. Chasing myrtle rust in New Zealand: host range and distribution over the first year after invasion [Erratum: May. 2020, v.49(3), p.327]

Author:
Toome-Heller, M.,   et al.   ; Ho, W. W. H.; Ganley, R. J.; Elliott, C. E. A.; Quinn, B.; Pearson, H. G.; Alexander, B. J. R.;     Show all 7 Authors
Source:
Australasian plant pathology 2020 v.49 no.3 pp. 221-230
ISSN:
0815-3191
Subject:
Myrtus communis; biosecurity; host range; hosts; hybrids; models; monitoring; new host records; pathogens; rust diseases; surveys; New Zealand
Abstract:
... After the detection of the myrtle rust pathogen, Austropuccinia psidii, in New Zealand, a biosecurity response was initiated, including a wide-spread surveillance programme. Through an intensive public awareness initiative, the general public was highly engaged in reporting myrtle rust infections and added significant value to the surveys by reporting first detections from most of the areas that a ...
DOI:
10.1007/s13313-020-00694-9

18. Senescence-Induced Vascular Remodeling Creates Therapeutic Vulnerabilities in Pancreas Cancer

Author:
Heller, Daniel A.,   et al.   ; Ruscetti, Marcus; Morris, John P.; Mezzadra, Riccardo; Russell, James; Leibold, Josef; Romesser, Paul B.; Simon, Janelle; Kulick, Amanda; Ho, Yu-jui; Fennell, Myles; Li, Jinyang; Norgard, Robert J.; Wilkinson, John E.; Alonso-Curbelo, Direna; Sridharan, Ramya; de Stanchina, Elisa; Stanger, Ben Z.; Sherr, Charles J.; Lowe, Scott W.;     Show all 20 Authors
Source:
Cell 2020 v.181 no.2 pp. 424-441.e21
ISSN:
0092-8674
Subject:
CD8-positive T-lymphocytes; adenocarcinoma; animal models; cytotoxicity; drug therapy; drugs; endothelial cells; immunosuppression; immunotherapy; mice; mutants; pancreatic neoplasms; phenotype
Abstract:
... KRAS mutant pancreatic ductal adenocarcinoma (PDAC) is characterized by a desmoplastic response that promotes hypovascularity, immunosuppression, and resistance to chemo- and immunotherapies. We show that a combination of MEK and CDK4/6 inhibitors that target KRAS-directed oncogenic signaling can suppress PDAC proliferation through induction of retinoblastoma (RB) protein-mediated senescence. In p ...
DOI:
10.1016/j.cell.2020.03.008

19. Transferrable AlGaN/GaN High-Electron Mobility Transistors to Arbitrary Substrates via a Two-Dimensional Boron Nitride Release Layer

Author:
Heller, Eric,   et al.   ; Motala, Michael J.; Blanton, Eric W.; Hilton, Albert; Muratore, Christopher; Burzynski, Katherine; Brown, Jeff L.; Chabak, Kelson; Durstock, Michael; Snure, Michael; Glavin, Nicholas R.;     Show all 11 Authors
Source:
ACS applied materials & interfaces 2020 v.12 no.19 pp. 21837-21844
ISSN:
1944-8252
Subject:
adhesion; boron nitride; ceramics; electronics; films (materials); polymers; silicon carbide; temperature; thermal conductivity; transistors; van der Waals forces
Abstract:
... Mechanical transfer of high-performing thin-film devices onto arbitrary substrates represents an exciting opportunity to improve device performance, explore nontraditional manufacturing approaches, and paves the way for soft, conformal, and flexible electronics. Using a two-dimensional boron nitride release layer, we demonstrate the transfer of AlGaN/GaN high-electron mobility transistors (HEMTs) ...
DOI:
10.1021/acsami.0c02818

20. Excited-State Turn-On of Aurophilicity and Tunability of Relativistic Effects in a Series of Digold Triazolates Synthesized via iClick

Author:
Heller, Jessica K.,   et al.   ; Zeman, Charles J.; Shen, Yu-Hsuan; Abboud, Khalil A.; Schanze, Kirk S.; Veige, Adam S.;     Show all 6 Authors
Source:
Journal of the American Chemical Society 2020 v.142 no.18 pp. 8331-8341
ISSN:
1520-5126
Subject:
aniline; density functional theory; fluorescence; gold; ligands; thiophene
Abstract:
... iClick reactions between Au(I) acetylides PPh₃Au–C≡CR, where R = nitrophenyl (PhNO₂), phenyl (Ph), thiophene (Th), bithiophene (biTh), and dimethyl aniline (PhNMe₂), and Au(I)–azide PPh₃AuN₃ provide digold complexes of the general formula R-1,5-bis-triphenylphosphinegold(I) 1,2,3-triazolate (Au₂-R). Within the digold triazolate complexes the Au(I) atoms are held in close proximity but beyond the d ...
DOI:
10.1021/jacs.0c01624