title: Honey: A biologic wound dressing

authors: Molan, Peter C.

subjects: biology of wound healing

abstract: Honey has been used as a wound dressing for thousands of years, but only in more recent times has a scientific explanation become available for its effectiveness. It is now realized that honey is a biologic wound dressing with multiple bioactivities that work in concert to expedite the healing process. The physical properties of honey also expedite the healing process: its acidity increases the release of oxygen from hemoglobin thereby making the wound environment less favorable for the activity of destructive proteases, and the high osmolarity of honey draws fluid out of the wound bed to create an outflow of lymph as occurs with negative pressure wound therapy.
   Honey has a broad-spectrum antibacterial activity, but there is much variation in potency between different honeys. There are 2 types of antibacterial activity. In most honeys the activity is due to hydrogen peroxide, but much of this is inactivated by the enzyme catalase that is present in blood, serum, and wound tissues. In manuka honey, the activity is due to methylglyoxal which is not inactivated. The manuka honey used in wound-care products can withstand dilution with substantial amounts of wound exudate and still maintain enough activity to inhibit the growth of bacteria. There is good evidence for honey also having bioactivities that stimulate the immune response (thus promoting the growth of tissues for wound repair), suppress inflammation, and bring about rapid autolytic debridement. There is clinical evidence for these actions, and research is providing scientific explanations for them.

text: Honey: A biologic wound dressing Honey has been used as a wound dressing for thousands of years, but only in more recent times has a scientific explanation become available for its effectiveness. It is now realized that honey is a biologic wound dressing with multiple bioactivities that work in concert to expedite the healing process. The physical properties of honey also expedite the healing process: its acidity increases the release of oxygen from hemoglobin thereby making the wound environment less favorable for the activity of destructive proteases, and the high osmolarity of honey draws fluid out of the wound bed to create an outflow of lymph as occurs with negative pressure wound therapy.
   Honey has a broad-spectrum antibacterial activity, but there is much variation in potency between different honeys. There are 2 types of antibacterial activity. In most honeys the activity is due to hydrogen peroxide, but much of this is inactivated by the enzyme catalase that is present in blood, serum, and wound tissues. In manuka honey, the activity is due to methylglyoxal which is not inactivated. The manuka honey used in wound-care products can withstand dilution with substantial amounts of wound exudate and still maintain enough activity to inhibit the growth of bacteria. There is good evidence for honey also having bioactivities that stimulate the immune response (thus promoting the growth of tissues for wound repair), suppress inflammation, and bring about rapid autolytic debridement. There is clinical evidence for these actions, and research is providing scientific explanations for them.

year: 2015

title: Heating of the solar wind with electron and proton effects

authors: Breech, Ben

subjects: turbulence

abstract: We examine the effects of including effects of both protons and electrons on the heating of the fast solar wind through two different approaches. In the ﬁrst approach, we incorporate the electron temperature in an MHD turbulence transport model for the solar wind. In the second approach, we adopt more empirically based methods by analyzing the measured proton and electron temperatures to calculate the heat deposition rates. Overall, we conclude that incorporating separate proton and electron temperatures and heat conduction effects provides an improved and more complete model of the heating of the solar wind.

text: Heating of the solar wind with electron and proton effects We examine the effects of including effects of both protons and electrons on the heating of the fast solar wind through two different approaches. In the ﬁrst approach, we incorporate the electron temperature in an MHD turbulence transport model for the solar wind. In the second approach, we adopt more empirically based methods by analyzing the measured proton and electron temperatures to calculate the heat deposition rates. Overall, we conclude that incorporating separate proton and electron temperatures and heat conduction effects provides an improved and more complete model of the heating of the solar wind.

year: 2010

title: Hidden hunger in a land of plenty: Food insecurity in Aotearoa New Zealand

authors: Graham, Rebekah Sarah

subjects: children, food, Māori, material hardship, scholar-activism

abstract: Aotearoa New Zealand is a relatively wealthy, food-producing nation. Yet, increasing numbers of the populace are experiencing food insecurity, hidden hunger, and material hardship. More than an individual issue, ensuring food security requires consideration of the social and cultural components of growing, preparing, and consuming food and meals. Access to sufficient food to eat and the surrounding social practices are central to human flourishing. This article documents three research exemplars that challenge dominant global representations of Aotearoa New Zealand as an idyllic haven. Each case explores the invisibility and downplaying of hunger and poverty that occur within this ‘land of plenty’. In describing and reflecting our respective research projects we illustrate how broader socio-political and economic factors play out materially in the everyday lives of marginalised groups by restricting access to food. Given that community psychologists have values which necessitate a critical praxis, we have the responsibility to challenge power differences and practices based on historical perceptions that serve to maintain inequities.

text: Hidden hunger in a land of plenty: Food insecurity in Aotearoa New Zealand Aotearoa New Zealand is a relatively wealthy, food-producing nation. Yet, increasing numbers of the populace are experiencing food insecurity, hidden hunger, and material hardship. More than an individual issue, ensuring food security requires consideration of the social and cultural components of growing, preparing, and consuming food and meals. Access to sufficient food to eat and the surrounding social practices are central to human flourishing. This article documents three research exemplars that challenge dominant global representations of Aotearoa New Zealand as an idyllic haven. Each case explores the invisibility and downplaying of hunger and poverty that occur within this ‘land of plenty’. In describing and reflecting our respective research projects we illustrate how broader socio-political and economic factors play out materially in the everyday lives of marginalised groups by restricting access to food. Given that community psychologists have values which necessitate a critical praxis, we have the responsibility to challenge power differences and practices based on historical perceptions that serve to maintain inequities.

year: 2022