Microscopic Frictional Response of Sodium Oleate Self-Assembled on Steel

The article peruses the frictional response of an important metal working lubricant additive, sodium oleate. Frictional force microscopy is used to track the response of molecules self-assembled on a steel substrate of 3–4 nm roughness at 0% relative humidity. The friction-normal load characteristic emerges as bell-shaped, where the peak friction and normal load at peak friction are both sensitive to substrate roughness. The frictional response at loads lower than that associated with the peak friction is path reversible while at higher loads the loading and unloading paths are different. We suggest that a new low-friction interface material is created when the normal loads are high.

Hospital social work in Australia: Emerging trends or more of the same?

Social work in health care has been established for more than 100 years and is one of the largest areas of practice for social workers. Over time, demographic changes and growth in the aging population, increased longevity rates, an explosion in rates of chronic illness together with rapidly increasing cost of health care have created serious challenges for acute hospitals and health social workers. This article reviews the Australian health care system and policies with particular emphasis on the public hospital system. It then examines current hospital social work roles, including the continued role in discharge planning and expanding responsibility for emerging client problems, such as patient complexity, legal, and carer issues. The article concludes with a discussion of evolving issues and challenges facing health social work to ensure that social work remain relevant within this practice context.

Preparation and Characterization of Glycolipid-Bearing Multilamellar and Unilamellar Liposomes

The carbohydrate residues of glycosphingolipids were implicated in many biologic processes such as cell-to-cell interactions; and as receptors for some viruses, bacterial and plant toxins, hormones, and so forth, and invariably for all the lectins (1). However, their receptor functions remained poorly defined for a long time as they form micelles even at very low concentrations in aqueous medium. In micelles, the oligosaccharide chains are not expected to have a well defined orientation suitable for recognition by macromolecular ligands. This problem was overcome by incorporating them in model membranes, namely, the liposomes. The demonstration of lectin-glycolipid interaction using liposomal model membranes was a crucial development that established glycolipids as biological receptors. Moreover, glycolipid-bearing liposomes provide a convenient system for investigating the role of glycolipid density, orientation, and exposure of their oligosaccharide chains at the membrane interface relevant to their receptor function (2–4).

Correlation of thermodynamic properties of chloromethanes

A correlation for entropy and enthalpy based on the two-parameter law of corresponding states and the reference substance concept has been obtained. For 199 points tested, the over-all average absolute deviation and the maximum deviations in the calculated values of entropy with the available data are 0.74 and 7.20%. The corresponding deviations of enthalpy are 1.86 and 15.0%, respectively. A compressibility chart for chloromethanes has been made and shown to be superior to existing charts. For 102 points tested, the average absolute and maximum deviations in the compressibilities were 1.80 and 19.5%, respectively.

Protein content and amino acid composition of some varieties of grain sorghum

Determination of the protein content and lysine levels of a number of nonhybrid varieties of grain sorghum indicates large variations in the protein content. Statistical analysis of data on amounts of lysine shows that a negative correlation exists between per cent lysine in the protein and per cent protein in the seed. The proportion of various protein fractions in endosperm of five varieties of grain sorghum of both low- and high-protein type has been determined. Results show that prolamine and glutelin are the principal protein fractions, and increased protein levels in sorghum varieties are correlated with an increase mainly in the prolamine fraction. Nine high- and low-protein varieties of grain sorghum have been analyzed for their amino acid composition by ion exchange procedures. One of the high-protein genetic varieties of sorghum has a high concentration of lysine in the seed. Amino acid composition of the protein fractions of two varieties is also reported. These data permit an evaluation of the nutritional quality of sorghum protein and factors that influence the quality of the protein.

Biosynthesis of isoleucine and valine in Mycobacterium tuberculosis H37 Rv

The enzymes involved in the biosynthesis of isoleucine and valine have been shown to be present in cell-free extracts of Mycobacterium tuberculosis H37Rv. In addition to the known enzymes of the pathway, cell-free extracts of this organism contain a new enzyme. When cell-free extracts were incubated with acetolactate and Image -ascorbic acid, without reduced nicotinamide adenine dinucleotide phosphate, the isomer of acetolactate, viz., α-keto-β-hydroxyisovalerate, was found to accumulate and was identified by different methods. The reaction is enzymic, and Image -ascorbic acid cannot be replaced by other reducing agents such as hydroquinone, 2,6-dichlorophenol indophenol, or glutathione; by derivatives of Image -ascorbic acid such as dehydroascorbic acid or dimethyl ascorbic acid; or by cobamide coenzyme. Since the extracts also isomerize α-acetohydroxybutyrate to α-keto-β-hydroxy-β-methylvalerate, the enzyme catalyzing the reaction has been termed “acetohydroxy acid isomerase.” This is the first time that the presence of acetohydroxy acid isomerase has been reported in any biological system and that a specific metabolic role has been assigned for Image -ascorbic acid. The extract also possesses reductase activity to convert α-keto-β-hydroxyisovalerate to α,β-dihydroxyisovalerate in the presence of reduced nicotinamide adenine dinucleotide phosphate.

Tetrasomaty in the roots ofCicer arietinum Linn

Sporadic instances of tetrasomaty in the primary and secondary roots of five varieties ofCicer arietinum Linn. are illustrated. The phenomenon was more common in Varieties I and II. The SAT-chromosomes are reliable guides to estimate the degree of polysomaty, since pre-treatment withp-dichlorobenzene revealed that cell types with 32 chromosomes at metaphase had two pairs of SAT-chromosomes associated with the nucleolus at prophase. Tetrasomatic cells appear to be limited to the dermatogen and periblem. Higher degrees of polysomaty were not observed.

Reaction of carbon disulfide with azide ion

Carbon disulfide reacts with azide ion to form the 1,2,3,4-thiatriazolinethionate ion and not the acyclic azido dithiocarbonate ion as previously reported. A series of salts of thiatriazoline have been prepared and none shows evidence for the presence of the azido group. Esters of thiatriazolinethione prepared by the reaction of the sodium salt with alkyl or acyl halides have been found to be either 5-(substituted) mercapto-1,2,3,4-thiatriazoles or 4-substituted 1,2,3,4-thiatriazoline-5-thiones. These structures have been assigned on the basis of degradative and spectroscopic evidence. The chemistry of the so-called azidodithiocarbonates has been reinterpreted in terms of the thiatriazole structure.

An exact analysis for vibration of simply-supported homogeneous and laminated thick rectangular plates

A three-dimensional linear, small deformation theory of elasticity solution by the direct method is developed for the free vibration of simply-supported, homogeneous, isotropic, thick rectangular plates. The solution is exact and involves determining a triply infinite sequence of eigenvalues from a doubly infinite set of closed form transcendental equations. As no restrictions are placed on the thickness variation of stresses or displacements, this formulation yields a triply infinite spectrum of frequencies, instead of only one doubly infinite spectrum by thin plate theory and three doubly infinite spectra by Mindlin's thick plate theory. Further, the present analysis yields symmetric thickness modes which neither of the approximate theories can identify. Some numerical results from the two approximate theories are compared with those from the present solution and some important conclusions regarding the effect of the assumptions made in the approximate theories are drawn. The thickness variations of stresses and displacements are also discussed. The analysis is readily extended for laminated plates of isotropic materials. Numerical results are also given for three-ply laminates, and are used to assess the accuracy of thin plate theory predictions for laminates. Extension to general lateral surface conditions and forced vibrations is indicated.

Italian ja Veneton läänin kolmas sektori. Maaraportti maaseutualueiden palvelutuotannon haasteista ja hyvistä käytännöistä.

Tiivistelmä Maaraportin tavoitteena on luoda yleiskatsaus Italian kolmanteen sektoriin ja tutkimus kohdistuu erityisesti Pohjois-Italiassa sijaitsevan Veneton läänin kolmannen sektorin palvelutuotantoon. Raportissa tarkastellaan erityisesti kolmannen sektorin ja julkisen palvelutuotantosektorin sekä julkishallinnon toiminnallisia suhteita. Kolmannen sektorin mahdollisuuksia vastata maaseutualueiden palvelujen tarjonnan haasteisiin on pyritty analysoimaan. Italia on julkishallinnon ja kolmannen sektorin palvelutuotannon kannalta tarkasteltuna nykytilanteessa mielenkiintoinen testilaboratorio koko Euroopan mittakaavassa johtuen maan historiallisista, kulttuuri-sista, kieli- ja maantieteellisistä sekä itse väestöpohjan tarjoamista haasteista. Italiasta ei voida puhua yhden homogeenisen valtiokäsitteen alla, koska maa toimii kulttuurisista perinteistään johtuen kolmella eri nopeudella. Itse valtio käsitettäkin tulkitaan Italiassa monin eri tavoin pohjautuen ”valtiona” nähdyn organisaation käytännön funktioon sitoutuneena alueellisiin ja kulttuurisiin tekijöihin. Teollinen, dynaaminen yritysten varakas Pohjois-Italia henkilöityneenä Milanoon, hallinnon ja kulttuurin leimaama Keski-Italia kiteytyneenä ikuiseen kaupunkiin Roomaan ja Napolin alapuolinen Etelä-Italia, joka painii ”järjestelmässä sisällä olevan järjestelmänsä” kanssa eivät ole koskaan muodos-taneet oikeasti yhtenäistä Italian valtiota. Italiassa erillisinä itsehallinnollisina alueina toimivat lääneiksi luettavat Sisilia, Trentino Alto-Adige, Val di Aosta, Sardegna ja Friuli-Venezia Giulia, mikä lisää hallinnollista kirjavuutta. Viimeisten vuosien aikana Italian julkishallinto on ollut jatkuvassa transitiotilassa yrittäessään kohdata uudistumisen vaateita globalisoituvassa maailmassa. Italiassa on meneillään hidas siirtyminen liittovaltiomaiseen järjestelmään ja jopa syvempään paikallisuuteen. Massiivinen ja raskas julkishallintokoneisto neljällä eri tasolla (valtio - lääninhallinnolliset alueet - vahvat maakunnat - kunnat) on erittäin hankalasti modernisoitavissa, mutta poliittinen tahtotila on vaihtumassa klassista vahvaa keskushallintoa kannattavasta ajattelutavasta hyväksymään federalistisia, alueellisia hallintoratkaisuja. Italiassa on herätty havaitsemaan, että ongelmien ratkaisu täytyy viedä itse alueille ja niiden ihmisille, koska unilateraalinen keskushallinnointitapa ei enää vastaa monikerroksisiin, moniulotteisiin alueellisiin haasteisiin. Jokaisella alueella on erilaiset lähtökohdat ongelmien ratkaisuihin myös globalisoitumisen asettamissa yhteisissä haasteissa. Kolmannen sektorin asema arvostettuna italialaisten kansalaispalvelujen täydentäjänä ja tuottajana alkaa olla nykypäivää. Kolmannen sektorin elintärkeä osuus uusien palvelutarpeiden tunnistamisessa on jo yleisesti tunnustettu tosiasia Italiassa. Vapaaehtoisjärjestöt toimivat eturivissä kansalaisten arkipäivässä ja pystyvät näin kanavoimaan ensimmäisinä sosiaalista kehityskulkua ja kohottamaan esiin erilaisia marginaalistenkin ryhmien tarpeita sekä vastaamaan niihin. Kolmas sektori laajentaa, tuottaa ja paikkaa paikallista julkista palvelutuotantoa. Ratkaiseva askel lainsäädännölliseltä kannalta on ollut rahoitusvirtojen ohjaaminen kolmannen sektorin ns. ONLUS-organisaatioille ja ONLUS-statuksen perustaminen vuonna 1997. Italiassa on 60 231.214 asukasta (31.7.2009) ja se on hallinnollisesti jakaantuneena 8 100 kuntaan. Suomessa vastaavat luvut ovat 5 350 712 asukasta ja 348 kuntaa (11/2009). Maantieteelliseltä kooltaan Italia ei eroa 301 338 km2:n pinta-alallaan paljonkaan Suomesta (338 424 km2). Väestömäärän erojen vuoksi Italiassa on keskimäärin 199,9 asukasta neliökilometrillä ja Suomessa 17,1. Maiden välinen suora vertailu ei ollut mittakaavaerojen vuoksi järkevää. Kuntien hallinnollinen rooli on Italiassa painotukseltaan erilainen kuin Suomessa. Suomessa kuntien vastuulla oleva sosiaali-, terveydenhuolto- ja koulutoimi eivät ole samassa laajuudessa italialaisten kuntien vastuulla vaan näiden toimialojen vastuulliset tahot ovat läänit terveydenhoitopiireineen sekä maakuntahallinto koulupiirien osalta. Italialaisten kuntien vastuualueet voivat myös vaihdella mittavasti perustuslaissa määriteltyjen perustoimien lisäksi. Tutkimuksen kohteeksi on rajattu Koillis-Italiassa sijaitseva Veneton läänin alue, koska se on väkimäärältään lähes yhtä suuri kuin Suomi, 4 893 309 asukasta (31.3.2009). Kuntien lukumäärä on huimaava 581 kpl. Veneto on maantieteelliseltä alueeltaan pieni ja harvaan asuttua maaseutua on pinta-alasta melko niukasti. Pohjoisen osan vuoristoalueet karuine olosuhteineen muodostavat palvelutuotannollisesti haas-teellisen ympäristön, joka on verrattavissa suomalaisten maaseutualueiden tilanteeseen. Venetossa on omaksuttu Italian mittakaavassa innovatiivisia ratkaisuja julkishallinnon palvelutuotannon ja kolmannen sektorin toiminnan osalta. Veneton alue on luokiteltu maailman pienyritysintensiivisimmäksi alueeksi, mikä heijastuu myös alueen palvelutuotantoratkaisuissa. Raportti esittelee ensin Italian hallintoa, keskushallinnon, paikallishallinnon ja tutkimuksen asettelulle olennaisten kolmannen sektorin toimijoiden osalta. Tämä on välttämätöntä, sillä kolmannen sektorin toiminta on Italiassa hyvin pitkälle lainsäädännöllä ohjattua ja rajattua. Kolmannen sektorin käsitteistöä, toimijoita, järjestäytymistä ja sen toimintaa säätelevää lainsäädäntöä esitellään tarkemmin. Veneton läänin osalta kolmanteen sektoriin perehdytään sekä hallinnon että toimijakentän näkökulmia tulkiten. Raportin lopussa esitellään kolmannen sektorin palvelutuotantoon ja hallinnointiin liittyviä case-esimerkkitapauksia.

The Open Access Scientific Journal: An Empirical Study

The open access (OA) model for journals is compared to the open source principle for computer software. Since the early 1990s nearly 1,000 OA scientific journals have emerged – mostly as voluntary community efforts, although recently some professionally operating publishers have used author charges or institutional membership. This study of OA journals without author charges shows that their impact is still relatively small, but awareness of it is increasing. The average number of research articles per year is lower than for major scientific journals but the publication times are shorter.

Growth and Convergence: The case of China

Growth and Convergence: The Case of China Since the initiation of economic reforms in 1978, China has become one of the world’s fast-growing economies. The rapid growth, however, has not been shared equally across the different regions in China. The prominent feature of substantial differences in incomes and growth rates across the different Chinese regions has attracted the attention of many researchers. This book focuses on issues related to economic growth and convergence across the Chinese regions over the past three decades. The book has eight chapters. Apart from an introduction chapter and a concluding chapter, all the other chapters each deal with some certain aspects of the central issue of regional growth and convergence across China over the past three decades. The whole book is organized as follows. Chapter 1 provides an introduction to the basic issues involved in this book. Chapter 2 tests economic growth and convergence across 31 Chinese provinces during 1981-2005, based on the theoretical framework of the Solow growth model. Chapter 3 investigates the relationship between openness to foreign economic activities, such as foreign trade and foreign direct investment, and the regional economic growth in the case of China during 1981-2005. Chapter 4, based on data of 31 Chinese provinces over the period 1980-2004, presents new evidence on the effects of structural shocks and structural transformation on growth and convergence among the Chinese regions. Chapter 5, by building up an empirical model that takes account of different potential effects of foreign direct investment, focuses on the impacts of foreign direct investment on China’s regional economic performance and growth. Chapter 6 reconsiders the growth and convergence problem of the Chinese regions in an alternative theoretical framework with endogenous saving behavior and capital mobility across regions. Chapter 7, by building up a theoretical model concerning comparative advantage and transaction efficiency, focuses on one of the potential mechanisms through which China achieves its fast economic growth over the past few decades. Chapter 8 concludes the book by summarizing the results from the previous chapters and suggesting directions for further studies.