Determination of resin acids in pulp mill effluent and receiving waters by high performance liquid chromatography

Resin acids are reported to be of major toxicological importance in pulp mill effluents for Rainbow Trout. Their determination, using a high performance liquid chromatographic method, is described.

Functionalization of bamboo pulp fabrics with noble metal nanoparticles

Noble metal (gold and silver) nanoparticles (NPs) were synthesized in-situ on bamboo pulp fabrics. The gold NPs were reduced by bamboo pulp fabrics and bonded to fibers under heating, and an alkaline condition was needed to synthesize silver NPs in the presence of bamboo pulp fabrics. The synthesized gold and silver NPs endowed bamboo pulp fabrics with different colors because of their localized surface plasmon resonance (LSPR) property. The colors of the fabrics treated with metal NPs were extended through complex synthesis of gold and silver NPs in different proportions. The bamboo pulp fabrics treated with noble metal NPs showed good fastness to light and rubbing. In addition, the gold and silver NPs imparted bamboo pulp fabrics excellent UV protection property and remarkable antibacterial activity.

Preparation of cellulose nanofiber from softwood pulp by ball milling

This paper reports the possibility of producing cellulose nanofiber from softwood pulp using a simple ball milling technique under ambient pressure and at room temperature. The effects of milling conditions including the ball-to-cellulose mass ratio, milling time, ball size and alkaline pretreatment were investigated. It was found that milling-ball size should be carefully selected for producing fibrous morphologies instead of particulates. Milling time and ball-to-cellulose mass ratio were also found important to control the fiber morphology. Alkali pre-treatment helped in weakening hydrogen bonds between cellulose fibrils and removing small particles, but with the risks of damaging the fibrous morphology. In a typical run, cellulose nanofiber with an average diameter of 100 nm was obtained using soft mechanical milling conditions using cerium-doped zirconia balls of 0.4–0.6 mm in diameter within 1.5 h without alkaline pretreatment.

Thermal and rheological characteristics of biobased carbon fiber precursor derived from low molecular weight organosolv lignin

In the present work, electrospinnability as well as thermal, rheological, and morphological characteristics of low molecular weight hardwood organosolv lignin, as a potential precursor for carbon fiber, was investigated. Submicromter biobased fibers were electrospun from a wide range of polymer solutions with different ratios of organosolv lignin to polyacrylonitrile (PAN). Rheological studies were conducted by measuring viscosity, surface tension, and electrical conductivity of hybrid polymer solutions, and used to correlate electrospinning behavior of solutions with the morphology of the resultant electrospun composite fibers. Using scanning electron microscopy (SEM) images, the solutions that led to the formation of bead-free uniform fibers were found. Differential scanning calorimetry (DSC) analysis revealed that lignin-based fibers enjoy higher decomposition temperatures than that of pure PAN. Thermal stability of the lignin-based fibers was investigated by thermogravimetric analysis (TGA) indicating a high carbon yield of above 50% at 600 °C, which is highly crucial in the production of low-cost carbon fiber. It was also observed that organosolv lignin synergistically affects thermal decomposition of composite fibers. A significant lower activation energy was found for the pyrolysis of lignin-derived electrospun fibers compared to that of pure PAN.

New activism and communication in Australian risk society : a case study of the Otway Ranges Environment Network

This paper overviews a case study of environmental grassroots activism in Victoria, Australia, between 1995 and 2003. The Otway Ranges Environment Network (OREN) is significant for its successful communication campaign to change forest practices and policy decision-making in the Otway Ranges, and for its intervention in a long-standing and exclusive relationship between government and the timber industry. This paper describes and analyses pivotal parts of the OREN campaign: firstly, the group's strategy to boycott paper and pulp manufacture Kimberly-Clark Australia; and secondly, its decision to participate in the West Victoria Regional Forest Agreement (RFA) process to negotiate the future of Otway forest. Informed by the empirical research and the works of social theorists Ulrich Beck and Jurgen Habermas, this paper outlines a strategic approach to communication that is effective, fair and sustainable, and that can be applied by other non-profits - especially those that operate in politically volatile environments with a grassroots agenda.

‘CHOU GAGS CRITICS IN BANDOENG or how the media framed Premier Zhou Enlai at the Bandung Conference, 1955

At the Asian-African Conference at Bandung, Indonesia, in April 1955, the world's press concentrated its gaze on Premier Zhou Enlai of the People's Republic of China. Premier Zhou's every gesture, interaction and statement was scrutinized for evidence that his motivations at Bandung were antagonistic to Western interests. This preoccupation with the motivations of the Chinese was, however, no new phenomenon. By 1955, literary tropes of the ‘Yellow Peril’ had been firmly established in the Western imagination and, after 1949, almost seamlessly made their transition into fears of infiltrating communist Chinese ‘Reds’.

The first half of this paper explores the historical roots of the West's perceptions of the Chinese, through the literary works of Daniel Defoe to the pulp fiction of Sax Rohmer's Dr Fu Manchu series, which ran from 1917 to 1959. It then examines how this negative template was mobilised by the print media at the height of the Cold War to characterize Premier Zhou Enlai, not only as untrustworthy, but also as antagonistically anti-Western. This reading of representations of Premier Zhou at Bandung, as well as the literary tropes propagated in support of eighteenth and nineteenth-century imperial expansion, exposes a history of Western (mis)interpretations of China, and sheds light upon the media network's role in constructing a Chinese enemy in the mid-1950s.

Preparation and characterization on cellulose nanofiber film

In this study, cellulose nanofibers were obtained from wood pulp using a chemo-mechanical method and thin films were made of these cellulose nanofibers. The morphology of the films was studied by scanning electron microscopy (SEM). SEM image analysis revealed that the films were composed of cellulose nanofibers with an average diameter of around 32 nm. Other properties were also characterized, including the degree of crystallinity by X-ray diffraction, chemical bonding by infrared attenuated total reflectance analysis, and thermal properties by differential scanning calorimetry. The foldable, strong, and optically translucent cellulose nanofiber films thus obtained have many potential applications as micro/nano electronic devices, biosensors and filtration media, etc.

By-product recovery in industrial wastewater pollution control

By-products from most industries become waste when they are not recovered. This article gives examples of by-product recovery from industries such as pulp and paper, dairy, pig farm and food processing.

Although the recovery of by-products will require new processes, the investments on those processes will be paid-back easily from the benefits brought by those by-products. Also, in order to have a sustainable development, by-product recover will play a significant role in all industries in the near future.

Fabrication of carbon nanofiber by pyrolysis of freeze-dried cellulose nanofiber

The possibility of fabricating carbon nanofibers from cellulose nanofibers was investigated. Cellulose nanofiber of ~50 nm in diameter was produced using ball milling in an eco-friendly manner. The effect of the drying techniques of cellulose nanofibers on the morphology of carbon residue was studied. After pyrolysis of freeze-dried cellulose nanofibers below 600 °C, amorphous carbon fibers of ~20 nm in diameter were obtained. The pyrolysis of oven-dried precursors resulted in the loss of original fibrous structures. The different results arising from the two drying techniques are attributed to the difference in the spatial distance between cellulose nanofiber precursors.

Novel polymer-ceramic composites for protection against ballistic fragments

For the first time, internally reinforced aggregate polymer ceramic composites were evaluated against fragment simulating projectiles (FSPs) of various calibers to investigate their ballistic impact response. Samples were prepared by mechanically mixing B4C and cBN over a range of ratios and combinations with either thermosetting phenolic or epoxy resin and aramid pulp. Dry mixtures were then molded in a closed die using a heated platen press. The resulting tiles were then mounted as ‘‘strike faces’’ to an aramid backing material using an epoxy resin. Backed targets were tested in a fully instrumented firing range against 5.56 mm FSPs to test ballistic limit. A further series of tests using 7.62, 12.5, and 20 mm FSPs was conducted to examine round deformation across a range of fragments calibers. Round deformations were measured after impact and plotted against shot velocity. It was found that the polymer ceramic composite materials were effective round deformers and, like sintered ceramic strike faces, demonstrated improved ballistic performance at an equivalent areal density and impressive multihit capability.

Small axe

‘18C’ was a response to the impending amendments by the Coalition Government which will remove sections 18B – E of the Racial Discrimination Act (RDA). The Coalition has left a brief window to gauge community responses – so artists, writers and academics were requested to respond with a work on paper (photographic or pulp) to this change of the RDA. Incorporating many new and existing works ‘18C’ sends notice with visual, verbal and written work to ensure that this does not go unchallenged.

An open mic will part of the opening night for performances and responses throughout the evening. Documentation collated from the exhibition and opening night will be submitted to the office of the Australian Attorney General.

Artists include: Ange Bailey, Bumpy Favell, David Blumenstein, Dominic Golding, Heather Horricks, Jef Tan, Kirsten Lyttle, Lulu Quintanilla, Megan Evans, Peter Waples Crowe, Susan Forrester, Tama TK Favell, Torika Bolatagici, Angela Tiatia, Chiara Scafidi, Deborah Kelly, Frances Tapueluelu, Jason Heller, Jenny Fraser, Lian Low, Martin Nixon, Megan Cope, Robyne Latham, Taloi Havini, Texta Queen, Weniki Hensch.

“For them, it seems to be an abstract philosophical or legal argument. For them it’s a game, it’s a debate about words and abstract principles… For people who have experienced racism, it is a deeply personal debate, and it’s actually a debate about real people and real hurt.” - Penny Wong

The Trial of Mengistu and Other Derg Members for Genocide, Torture and Summary Executions in Ethiopia

The books argues for the rule of law, respect for human rights and the eradication of a culture of impunity in Africa. it is a product of peer-reviewed contributions from graduates of the Centre for Human Rights, Faculty of Law, University ...