Researchers estimate that about 70 – 80 % of Yemenis between 16 and 50 years old chew khat, at least on occasion, and it has been estimated that Yemenis spend about 14. 6 million person-hours per day chewing khat.

Researchers estimate that anywhere from a third to half of the world's human population carry a Toxoplasma infection.

Researchers at the University of Alaska Fairbanks, United States estimate that a network of such lines, combined with coastal wind turbines, could substantially reduce rural Alaska ’ s dependence on increasingly expensive diesel fuel for power generation.

Researchers theorize that empathic emotions, or those relating to the emotions of others, arose due to reciprocal altruism, mother-child bonding, and the need to accurately estimate the future actions of conspecifics.

Researchers estimate the bycatch of young red snapper, especially by shrimp trawlers, is a significant concern.

Researchers estimate that the prehistoric marsupial first appeared about 15 million years ago and died out about 12 million years ago, perhaps from climate change induced losses in habitat.

Researchers estimate that United States firms alone spent US $ 1. 51 billion on email marketing in 2011 and will grow to $ 2. 468 billion by 2016.

* Researchers estimate that sometime in the 1930s a form of simian immunodeficiency virus, SIV, jumped to humans in central Africa.

Researchers estimate 597 Mexicans were lynched between 1848 and 1928.

Researchers estimate the extent of old growth in the forest is.

Researchers noted a strong correlation between the design and layout of a user interface and the perceived level of trust from the user.

Researchers who employ relational ethics value and respect the connection between themselves and the people they study, and " between researchers and the communities in which they live and work " ( Ellis, 2007, p. 4 ).

Researchers have described differences between bilinguals and monolinguals in perception of color, representations of time, or other elements of cognition.

Researchers performing twin studies have argued that differences between people on behavioral traits such as creativity, extroversion and aggressiveness are between 45 % to 75 % due to genetic differences, and intelligence is said by some to be about 80 % genetic after one matures ( discussed at Intelligence quotient # Shared_family_environment ).

Researchers at The University of North Carolina at Chapel Hill are currently undergoing a study to determine if estrogen replacement therapy can improve cardiovascular health and prevent depression in perimenopausal women between the ages of 45 and 55.

Researchers have compared the prevalence of eczema in people who also suffer from celiac disease to eczema prevalence in control subjects, and have found that eczema occurs about three times more frequently in celiac disease patients and about two times more frequently in relatives of celiac patients, potentially indicating a genetic link between the two conditions.

Researchers at the University of Strathclyde in August 2010 made a study ( old citation link broken ) of seventy women between the ages of 60 and 85 years ; half were Scottish country dancers and the remainder participated in other physical activities such as swimming, walking, golf and keep fit classes.

Researchers at the Overseas Development Institute compares situations such as in Uganda, where during a period of annual growth of 2. 5 % between 2000 and 2003, the percentage of people living in poverty actually increased by 3. 8 %.

Researchers have done various studies in order to understand the relationship between religion and prejudice ; thus far, they have received mixed results.

Researchers tested fruit bats for the presence of the Ebola virus between 2001 and 2003.

Researchers and clinicians have drawn a link between this neurochemical disregulation and the development of chronic health problems such as depression, obesity, diabetes, hypertension, and coronary artery disease.

Researchers draw inferences from the difference between the knockout organism and normal individuals.

Researchers find that positive relationships built between unrelated children and elders in these settings tend to be generalized to relationships within the family at home.

Researchers have constructed such a lens using a liquid crystal layer sandwiched between two glass substrates.

Researchers are currently investigating the link between positive caregiver – child relationships and the development of hormone systems, such as the HPA axis.

Researchers believe that preference indicates the infant ’ s ability to discriminate between the two events.

Researchers suggest forming an alliance between the emergency food program and community-supported agriculture, as some countries ' food stamps cannot be used at farmer's markets and places where food is less processed and grown locally.

Researchers translate these reasons into the context of the scientist-practitioner gap or the “ lack of alignment between research and practice .”

Researchers at Northwestern University have used infrared light to directly stimulate the neurons in the inner ear of deaf guinea pigs while recording electrical activity in the inferior colliculus, an area of the midbrain that acts as a bridge between the inner ear and the auditory cortex.

Researchers have argued that there should be a splitting of the oncilla into two species, as there is pronounced difference in appearance between the oncillas in Costa Rica as compared to those in central and southern Brazil.

Researchers have struggled to reconcile Himiko / Pimiko between the Chinese and Japanese historical sources above.

Researchers in the field of population genetics have been using these to elucidate ancient migrations and relationships between population groups.

Another theory for the decline might be, as research shows, that species from the Southern Hemisphere are on average 4. 6 million years old, compared to an average 2. 9 million years old for the Northern Hemisphere: Researchers believe this age difference is because of the history of severe Ice Ages in the Northern Hemisphere, which may drive older species to extinction.

Researchers found that the primary RNA transcript produced by adenovirus type 2 in the late phase was spliced in many different ways, resulting in mRNAs encoding different viral proteins.

Researchers also determined that Mammoth releases about of CO < sub > 2 </ sub > every day.

Researchers are looking into methods of transferring single graphene sheets from their source of origin ( mechanical exfoliation on SiO < sub > 2 </ sub > / Si or thermal graphitization of a SiC surface ) onto a target substrate of interest.

Researchers prove that in the developing CNS, Nav1. 2 is initially expressed at all forming nodes Ranvier.

Researchers in Israel are experimenting with using CO < sub > 2 </ sub > lasers to weld human tissue, as an alternative to traditional sutures.

Researchers are testing the effect of penicillin G sodium and biocide 2, 2-dibromo-3-nitrilopropionamide as potential treatments for infected citrus plants based on the positive results that were observed when applied to infected periwinkle.

Researchers have described at least three forms of achondrogenesis, designated as Achondrogenesis type 1A, achondrogenesis type 1B and achondrogenesis type 2.

Discovery-Based Science Education: Functional Genomic Dissection in Drosophila by Undergraduate Researchers, PLoS Biology, Volume 3, Issue 2, February 2005