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Now available on Fast Track: Egg size and shape variation in Rufous Bush Chats (Cercotrichas galactotes) breeding in date palm plantations: hatching success increases with egg elongation

Posted on 23. April, 2018.

In oviparous taxa such as birds, clutch characteristics (e.g. egg size, egg mass and the number of eggs) can be considered as energetic investment in reproduction. In this paper, we study variation in the principal component indices of egg size and shape in Rufous Bush Chats (Cercotrichas galactotes) breeding in date palm plantations in the Al Amri Oasis, north Algeria, in 2008–2009 and 2011–2013.


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Free for 24 hours - The mechanism of the reaction of the Tollens reagent

Posted on 7. March, 2018.

The Tollens test for aldehydes has been used for over 100 years but no reason has been given for adding sodium hydroxide to the silver nitrate before the solution is cleared with ammonia. In this paper, a mechanism is proposed which explains why the addition of alkali makes the test much more sensitive.


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A Free Review from Progress in Reaction Kinetics and Mechanism: Halocarbenes may deplete atmospheric ozone

Posted on 6. March, 2018.

The stratospheric ozone layer protects biological processes on Earth by absorbing the more harmful solar UV radiation. The discovery of the loss of stratospheric O3 led to investigations to find the cause. It was found that chlorofluorocarbons had long atmospheric lifetimes and could reach the stratosphere where they photocleaved to yield Cl atoms which destroyed O3 in a catalytic chain reaction.


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A convenient synthesis of gimeracil

Posted on 6. March, 2018.

A practical three-step synthetic approach to gimeracil in a 68% overall yield is described, using 2,4-dimethoxypyridine as the starting material with 3,5-dichloro-2,4-dimethoxypyridine and 3,5-dichloro-2,4-dihydroxypyridine as intermediates. The advantages of this procedure include short reaction steps, simple operation and good yield.


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Weather-dependent variation in the winter diet of urban roosting Long-eared Owls (Asio otus) in Pécs (Hungary)

Posted on 5. March, 2018.

Long-eared Owls usually winter in groups, mainly on evergreen trees in settlements, They hunt at night and rest in trees during the day. The indigestible parts of the prey (e.g. bones, hair, feathers and chitin) are regurgitated in the form of pellets, from which one can conclude the composition of their diet. 


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Substitute group-tuned Schiff-base manganese(III)-based cyanide-bridged bimetallic complexes: synthesis, crystal structures and magnetic properties

Posted on 5. March, 2018.

The trinuclear cyanide-bridged heterometallic Pd(ii)–Mn(iii) complexes {[Mn(L1)(H2O)]2[Pd(CN)4]} and {[Mn(L2)(H2O)]2[Pd(CN)4]}·2H2O(L1 = N,N′-1,2-propylene-bis(3-methoxysalicylideneiminate; L2 = N,N′-1,2-propylene-bis(3-ethoxysalicylideneiminate) were obtained and structurally and magnetically characterised. X-ray diffraction revealed their cyanide-bridged trinuclear core nature with a conformational difference. The magnetic susceptibilities of the two complexes revealed overall weak antiferromagnetic interactions between the adjacent Mn(iii) ions.


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Free Review articles in Progress in Reaction Kinetics and Mechanism

Posted on 3. March, 2018.

The complete list of free to read review articles in Progress in Reaction Kinetics and Mechanism.


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Avian News

Posted on 2. March, 2018.

2018: Year of the Bird
2018 marks the centennial of the Migratory Bird Treaty Act. To honour this milestone, National Geographic, the National Audubon Society, the Cornell Lab of Ornithology and BirdLife International are joining forces with more than 100 other organisations to celebrate 2018 as the Year of the Bird.
This effort aims to heighten public awareness of birds because of their wonder and beauty, and because they symbolise nature’s interconnectedness and the importance of caring for our shared planet.
To get started, visitors to BirdYourWorld.org will discover simple but meaningful steps that anyone can take to help birds each month and join a pledge to participate. These steps include participating in the worldwide Great Backyard Bird Count in February, putting in native plants in the spring, and cutting back on the use of plastic materials.

Through 12 months of storytelling, science research, and conservation efforts, Year of the Bird will examine how our changing environment is driving dramatic losses among bird species around the globe and highlight what we can do to help bring birds back.
Participating organisations include nonprofit and conservation groups, state and federal agencies, zoos, nature centres, and ornithological societies that are working together to raise the visibility of birds and inspire action through #BirdYourWorld throughout 2018. The campaign will also utilise National Geographic’s portfolio of media platforms reaching millions of people around the world with engaging bird content that will educate, inspire, and raise awareness about the challenges that birds are facing and what people can do to help.

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Free from the Science Reviews archive: Zinc/ammonium formate: a new facile system for the rapid and selective reduction of oximes to amines

Posted on 1. March, 2018.

Abstract

Various oximes, both aldoximes and ketoximes, are selectively reduced to corresponding amines employing low cost zinc dust and ammonium formate despite presence of other functional groups such as halogens, –OH, –OCH3, –COOH, –CN, > C = C < and –CH3.


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