Results 51 to 60 of about 278,032 (289)

Concrete and Formal Operational Thought: Implications for Introductory College Biology [PDF]

The American Biology Teacher, 1976
THE COGNITIVE ABILITIES of concrete operational and formal operational thinkers, as defined by the Swiss psychologist Jean Piaget, have received a great deal of attention in recent years. This article briefly describes the stages involved in Piaget's model and reviews the current literature as it applies to Piaget's ideas and specifically to students ...
Suzanne B. Haley, Ronald G. Good
openaire   +1 more source

NRASQ61R Expression in Lymphatic Endothelial Cells Causes Enlarged Vessels, Hemorrhagic Chylous Effusions, and High Mortality in a Mouse Model of Kaposiform Lymphangiomatosis

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Kaposiform lymphangiomatosis (KLA) is an aggressive complex lymphatic anomaly. Patients exhibit malformed lymphatic vessels and often develop hemorrhagic effusions and elevated angiopoietin‐2 (Ang‐2) levels. A somatic NRAS p.Q61R (NRASQ61R) mutation has been associated with KLA.
C. Griffin McDaniel, Patricia Pastura, Joshua P. Scallan, Timothy D. Le Cras   +3 more
wiley   +1 more source

Pulmonary Dysfunction Is Associated With Sleep Study Abnormalities in Children With Sickle Cell Disease: A Multicenter Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Pulmonary dysfunction and sleep abnormalities are common in children with sickle cell disease (SCD) and are associated with worse clinical outcomes. Whether spirometry abnormalities are associated with polysomnography (PSG) findings remains unclear.
Ammar Saadoon Alishlash, Anis Rabbani Nourani, A. K. M. Fazlur Rahman, Dima Ezmigna, Tarig Ali‐Dinar   +4 more
wiley   +1 more source

Travelling wave solutions in a negative nonlinear diffusion-reaction model

, 2020
We use a geometric approach to prove the existence of smooth travelling wave solutions of a nonlinear diffusion-reaction equation with logistic kinetics and a convex nonlinear diffusivity function which changes sign twice in our domain of interest.
Li, Yifei, Marangell, Robert, Simpson, Matthew J., van Heijster, Peter   +3 more
core   +1 more source

Modular organisation of interaction networks based on asymptotic dynamics [PDF]

, 2012
This paper investigates questions related to the modularity in discrete models of biological interaction networks. We develop a theoretical framework based on the analysis of their asymptotic dynamics.
Delaplace, Franck, Klaudel, Hanna, Melliti, Tarek, Sené, Sylvain   +3 more
core   +6 more sources

Degenerate Diffusion Operators Arising in Population Biology

, 2011
We analyze a class of partial differential equations that arise as "backwards Kolmogorov operators" in infinite population limits of the Wright-Fisher models in population genetics and in mathematical finance. These are degenerate elliptic operators defined on manifolds with corners. The classical example is the Kimura diffusion operator, which acts on
Epstein, Charles L., Mazzeo, Rafe
openaire   +2 more sources

Implementation of Standard Operating Procedures In Biology Practicum High School

Bioma : Jurnal Ilmiah Biologi, 2023
The Laboratory is a room or places equipped with tools and materials suitable for teaching science or implementing science practicum. Laboratory management in terms of organizational structure, activities, and facilities needs to be evaluated to increase awareness of the effectiveness of science learning and increase laboratory safety to the optimum ...
Alfrista Novalia Putri, Febrina Ayu Wulandari, Arum Wilianti Suparno, Arista Mukti Khasanah, Tri Eva Rahmadani, Much. Fuad Saifuddin, Etika Dyah Puspitasari   +6 more
openaire   +1 more source

Infection Control Practices for Vascular Access Management in Hemodialysis: Results From a Nationwide Survey of Japanese National University Hospitals

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Bloodstream infections due to repeated vascular access (VA) puncture and circuit connections remain major concerns in hemodialysis. Therefore, we examined current practices for glove, disinfectant, and personal protective equipment (PPE) use according to VA type in national university hospitals in Japan.
Aiko Yamada, Makoto Harada, Tadahiko Kikugawa, Takeshi Nakata, Koji Hashimoto, Tsuneo Konta, Yuji Kamijo   +6 more
wiley   +1 more source

Control of reaction-diffusion equations on time-evolving manifolds

, 2016
Among the main actors of organism development there are morphogens, which are signaling molecules diffusing in the developing organism and acting on cells to produce local responses. Growth is thus determined by the distribution of such signal. Meanwhile,
Duteil, Nastassia Pouradier, Piccoli, Benedetto, Rossi, Francesco, Yakoby, Nir   +3 more
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source