Helen Cheng

ORCID: 0000-0002-9263-1349
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About
Contact & Profiles
Research Areas
  • HIV/AIDS Research and Interventions
  • Adolescent Sexual and Reproductive Health
  • Underwater Vehicles and Communication Systems
  • Protist diversity and phylogeny
  • Metal-Catalyzed Oxygenation Mechanisms
  • Subterranean biodiversity and taxonomy
  • Photosynthetic Processes and Mechanisms
  • HIV Research and Treatment
  • HIV, Drug Use, Sexual Risk
  • Metalloenzymes and iron-sulfur proteins
  • HIV-related health complications and treatments
  • Marine and fisheries research
  • Coastal and Marine Management
  • Reproductive tract infections research
  • Prostate Cancer Treatment and Research
  • Advanced NMR Techniques and Applications
  • Female Genital Mutilation/Cutting Issues
  • Hepatitis B Virus Studies
  • Enzyme function and inhibition
  • Microbial Fuel Cells and Bioremediation
  • Coastal wetland ecosystem dynamics
  • Jewish and Middle Eastern Studies
  • Reproductive Health and Contraception
  • Flood Risk Assessment and Management
  • Prenatal Substance Exposure Effects

NOAA National Marine Fisheries Service Northeast Fisheries Science Center
2023

Northeastern University
2021-2023

Universidad del Noreste
2021

University of New Hampshire
2015-2020

Biota Pharmaceuticals (United States)
2019

RTI International
2009-2017

Black Women’s Health Imperative
2014-2017

Hong Kong Polytechnic University
2013

Wuhan University
2013

University of Wisconsin System
1995

In VOICE, a phase IIB trial of daily oral and vaginal tenofovir for HIV prevention, at least 50% women receiving active products had undetectable in all plasma samples tested. MTN-003D, an ancillary study using in-depth interviews (IDIs) focus group discussions (FGDs), together with retrospective disclosure pharmacokinetic results, explored adherence challenges during VOICE.We systematically recruited participants data (median six samples), categorized as low (0%, N = 79), inconsistent...

10.1097/qad.0000000000000801 article EN AIDS 2015-10-07

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAmino acid residues in Anabaena ferredoxin crucial to interaction with ferredoxin-NADP+ reductase: Site-directed mutagenesis and laser flash photolysisJ. K. Hurley, Z. Salamon, T. E. Meyer, J. C. Fitch, M. A. Cusanovich, L. Markley, H. Cheng, B. Xia, Y. Chae, Cite this: Biochemistry 1993, 32, 36, 9346–9354Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September...

10.1021/bi00087a013 article EN Biochemistry 1993-09-01

Abstract Methods for Improving Reproductive Health in Africa (MIRA), a phase III HIV prevention trial, was conducted among 5039 Zimbabwean and South African women to test the Ortho All-Flex diaphragm Replens® lubricant gel. Among 2418 intervention group participants, 105 who had completed trial 41 male partners participated focus discussions in-depth interviews about acceptability of gel their experiences using study products. Women qualitative exited prior nine months, were negative, used...

10.1080/09540121.2010.543879 article EN AIDS Care 2011-04-08

Pseudomonas putida and Azotobacter vinelandii ferredoxins each contain one [4Fe-4S] cluster [3Fe-4S] cluster. Their polypeptide chains are nearly identical, differing by only 15 residues out of a total 106. T1 measurements temperature dependence studies the 1H NMR spectrum ferredoxin demonstrate that all six resolved downfield resonances near an iron-sulfur center. The five most shown to arise from protons on cysteinyl beta-carbons incorporation cysteine deuterated at beta-carbon into cell...

10.1016/s0021-9258(19)38358-9 article EN cc-by Journal of Biological Chemistry 1990-07-01

Wijsman, K., D. S. N. Auyeung, P. Brashear, B. F. Branco, K. Graziano, M. Groffman, H. Cheng, and Corbett. 2021. Operationalizing resilience: co-creating a framework to monitor hard, natural, nature-based shoreline features in New York State. Ecology Society 26(3):10. https://doi.org/10.5751/ES-12182-260310

10.5751/es-12182-260310 article EN cc-by Ecology and Society 2021-01-01

Coastal communities are threatened by extreme weather events in the form of storm surge and frequent, chronic, or nuisance flooding. The physical damage these is vast established literature; however, social-emotional impacts less well-documented. This pilot study sought to understand tidal flooding on flood-prone Queens, NY. Through in-depth, semi-structured interviews (n=9) with civic science participants, we document impacts, identify adaptations flooding, examine sources information about...

10.15365/cate.2021.140104 article EN cc-by Cities and the Environment 2021-07-29

Ferredoxins are proteins which contain iron and inorganic sulfide capable of electron transport. They found in a wide range organisms, from anaerobic bacteria, to plants mammals. Although NMR spectroscopy has been used study ferredoxins since the 1970s, little important structural or biochemical information resulted these investigations. The major difficulty effect paramagnetic iron-sulfur clusters on peptide resonances, hindering nuclear Overhauser (NOE) studies causing broad line widths....

10.1016/s0021-9258(18)42409-x article EN cc-by Journal of Biological Chemistry 1992-04-01

The Biota Project communicates science to populations historically ignored by the scientific community. is comprised of a team young professionals from myriad backgrounds and locations with interests in promoting accessibility equity. We do this highlighting research conducted scientists underrepresented groups relatable yet underrated intention increasing participation science. centers on definition symbiosis as tool for both educating learning its followers. deliver stories environments...

10.1093/icb/icy091 article EN Integrative and Comparative Biology 2018-07-09

Abstract Climate change is increasingly impacting marine fisheries worldwide. Concurrently, scientific interest has grown to understand how these systems can cope and adapt, with research shifting from examining vulnerability assessing risks focusing on determining operationalizing resilience. As fisheries-climate-resilience researchers practitioners navigating a sea of frameworks, toolkits, strategies, policy goals, management desires, we take stock ask: what does resilience mean us?...

10.1093/icesjms/fsad151 article EN cc-by ICES Journal of Marine Science 2023-10-09

In order to effectively manage a fishery, it is important know the essential habitats used by all life history stages of species being managed. However, this often challenge for animals such as American horseshoe crab Limulus polyphemus , whose juvenile are difficult find and quantify. Visual surveys suction sampling have been in previous studies, but Great Bay Estuary, New Hampshire, they less effective, so little known about occupied crabs area. To fill knowledge gap, we SCUBA-dive locate...

10.3354/meps13611 article EN Marine Ecology Progress Series 2020-12-16

Recently, 3D generative domain adaptation has emerged to adapt the pre-trained generator other domains without collecting massive datasets and camera pose distributions. Typically, they leverage large-scale text-to-image diffusion models synthesize images for target then fine-tune model. However, suffer from tedious pipeline of data generation, which inevitably introduces bias between source synthetic dataset. Furthermore, are not generalized support one-shot image-guided adaptation, is more...

10.48550/arxiv.2412.15491 preprint EN arXiv (Cornell University) 2024-12-19
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