Stanford University
Showing 14,001-14,050 of 34,423 Results
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Israel Juarez Contreras
Postdoctoral Scholar, Biochemistry
Current Research and Scholarly InterestsSterols are the most abundant lipid in the plasma membrane. Their structure is deeply conserved, built though a long iterative evolutionary process whose end products are the topology of the fused steroid ring system and the structure of the aliphatic tail extending from it. Together these let the molecule pack tightly against the acyl chains of neighboring lipids, which is how sterols reinforce the membrane and set its fluidity. This same interaction produces a second effect. Sterols associate preferentially with saturated lipids, particularly sphingolipids, and that preference sorts the bilayer into ordered domains, often called lipid rafts, which concentrate certain proteins and exclude others.
The Bloch hypothesis holds that the sterol biosynthetic pathway was progressively selected for membrane function, with each step yielding a molecule better suited to the bilayer than the one before it. Fluidity has historically been taken as the property under selection, but it is not the only one. Rebuilding ergosterol biosynthesis stepwise in living yeast showed that domain formation imposes its own demands, and that the two properties are not optimized by the same modifications. The pathway alternates between them, arriving at structures that regulate fluidity and organization together rather than either alone. A further design principle follows from this. The pairing between a sterol and the acyl chain length of its partner sphingolipid is highly specific. Replacing the native pathway in yeast with cholesterol biosynthesis abolished the domains ergosterol supports, since ergosterol pairs with the very long acyl chains of fungal sphingolipids while cholesterol pairs with the shorter chains of mammalian membranes.
These principles, observed in fungi, carry direct consequences for mammals, where cholesterol occupies two distinct pools. One is structural, held in complex with sphingolipids and other lipids. The other is a residual fraction, free or accessible that carries out essential roles in signaling and homeostasis. Accessible cholesterol is defined operationally, by what a probe can bind, but what it corresponds to physiochemically remains open. My central goal is to define accessible cholesterol through a more rigorous biophysical lens and connect that definition to the machinery in cells. -
Maria Juarez-Reyes
Clinical Associate Professor, Medicine - Primary Care and Population Health
BioDr. Juarez-Reyes received her PhD in Health Psychology, MD and Internal Medicine residency training from the University of California at San Francisco. Her focus during medical training was in Behavioral Medicine. In 2010, she became board certified in Integrative Medicine through American Board of Integrative Holistic Medicine. She is currently a Clinical
Associate Professor in the Division of Primary Care and Population Health, Department of Medicine, Stanford University. She is currently the Director of Behavioral Health Group Medical Visits and serves as Site Director for Internal Medicine Residency program at Stanford. She developed “Beyond Stress”, a six-week group intervention for patients with stress, anxiety, and depression. This intervention has now been translated into Spanish, Mas Alla del Estres, and it is delivered to community based Spanish speaking cancer patients.
Her current research evaluates integrative behavioral health group medical visits and the relationship to anxiety, depression, burnout, and sleep in primary care and Spanish speaking community-based populations. Previous health disparities research includes tobacco cessation practices of community-based providers, breast cancer screening follow-up in Latinx women, Latinx adolescent reproductive behavior, medication eligibility criteria effects in ethnic subgroups, and TB treatment in urban county jails. She enjoys travel, walking with friends, anything science fiction and spending time with her family. -
Connie Juel
Professor of Education, Emerita
Current Research and Scholarly InterestsPoor Reading in Preterms: Neural Basis, Prediction, & Response to Intervention (with Heidi Feldman & Michal Ben Shachar). Five-year grant funded by NICHD, 2012-2017.
Effects of early elementary school instruction, and specific interventions, on literacy and language growth.
Longitudinal study of literacy development from preschool through first grade. Focus on classroom factors in 13 kindergarten and 13 first grade classrooms that affect growth across the years in children with different entering skill and language profiles. -
Riley Juenemann
Ph.D. Student in Computational and Mathematical Engineering, admitted Autumn 2021
BioThird-year Computational and Mathematical Engineering (ICME) PhD Candidate @ Stanford University passionate about research at the intersection of mathematics, computing, and biology.
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Dominik Juling
Ph.D. Student in Environmental Social Sciences, admitted Autumn 2026
BioDominik Juling is a PhD student in Environmental Social Sciences (EBS). His research examines the intersection of climate change, peace, and conflict, focusing on how urban communities experience and respond to climate stress in ways that dominant security frameworks often fail to anticipate. He uses mixed-method approaches, combining multi-sited ethnography, remote sensing and GIS, and discourse analyses.
Before coming to Stanford, he earned master's degrees from Yale University and the London School of Economics and Political Science in environmental sciences and conflict studies.
He publishes across academic, policy, and public-facing formats in English and German, always exploring new fields, challenges, and questions. -
Maximilian Julve
Clinical Assistant Professor, Medicine - Oncology
BioDr. Max Julve is a medical oncologist and Clinical Assistant Professor of Medicine (Oncology) at Stanford University School of Medicine, with a clinical and research focus in solid tumor cellular therapy and melanoma.
Dr. Julve completed his medical training at Barts and The Royal London School of Medicine in the United Kingdom, followed by internal medicine training at teaching hospitals across North and Central London. He was subsequently awarded a National Institute for Health and Care Research (NIHR) Academic Clinical Fellowship in Medical Oncology at Imperial College London. During this time, alongside his clinical training, he conducted translational research within the King’s College London Immunoengineering group, focusing on transcriptional optimization of CAR-T cell therapies.
Dr. Julve later completed advanced clinical fellowships in solid tumor cellular therapy and melanoma at The Royal Marsden Hospital, London, and earned an MD(Res) doctorate investigating the role of immunosuppressive granulocytes in patients receiving immunotherapy.
He is a clinical investigator specializing in melanoma, immuno-oncology, and solid tumor cellular therapy, with a particular emphasis on translating mechanistic insights from the laboratory into novel therapeutic strategies for patients. -
Irene Jun
Clinical Assistant Professor, Pediatrics - Neonatology
BioIrene Jun, MD, is a Clinical Assistant Professor of Pediatrics in the Division of Neonatal and Developmental Medicine at Stanford University School of Medicine and a neonatal hospitalist at Lucile Packard Children’s Hospital Stanford. Her academic work focuses on newborn care, neonatal resuscitation, and medical education.
Dr. Jun serves as Associate Rotation Director for the Packard Intermediate Care Nursery, a core Stanford pediatric residency rotation that she has helped lead since 2012. She has developed an extensive curriculum of bedside, simulation-based, digital, and point-of-care educational resources to support pediatric trainees in newborn medicine.
Her scholarly interests include delivery room education, neonatal resuscitation, simulation, and innovative approaches to point-of-care learning.
