176 research outputs found
The first mononuclear PtIII complex. Molecular structures of (NBu4)[PtIII(C6Cl5)4] and of its parent compound {NBu4}2[PtII(C6Cl5)4]·2CH2Cl2
(NBu4)[PtIII(C6Cl5)4], fully characterized by crystallographic, spectral, and magnetic measurements has been isolated by oxidation with halogens or TICl3 of the parent compound (NBu4)2[PtII(C6CL5)4], which has also been analysed by X-ray crystallography
Synthesis and reactivity of [NBu4]+[Pt(III)(C6Cl5)4]-: molecular structures of [NBu4]2+[Pt(C6Cl5)4]2-.cntdot.2CH2Cl2, [NBu4]+[Pt(III)(C6Cl5)4]- and [NBu4]+[Pt(C6Cl5)4(NO)]-
The synthesis and chemical and spectral characterizations of compounds [ N B ~ ~ ] ~ + [ P t ( c ~(lc)l,~ ) ~ ] ~ -
[NBu ~ ]+[ P ~ (C~(C21~, [~N)B~ ]u-~ ]+[P~(C~CI~)(~31N, aOn]d- [NBU~]+[P~(C~C~,)~(4() ParPe~ d~es)c]ri-be d
in this paper. By far the most intriguing complex is 2, the first mononuclear Pt(II1) complex ever reported.
[NBu4]+[Pt(C&l5),]-( 2) can be prepared by reacting [NBu4]2+[Pt(C,C15)4]2(-1 ) with various oxidants such
as C12, Br2, 12, or T1C13 and also by the electrochemical oxidation of 1 at 0.7 V in CH2C12. Compound 2
is stable to air and moisture, shows very limited reactivity, and has magnetic properties consistent with
a 1/2 spin system. Complex 2 reacts with NO gas to give the adduct [NBu4]'[Pt(C6Cl5),(NO)]- (3), which
can also be made directly from 1 by reaction with [NO]+[ClO,]- under an atmosphere at NO. Attempts
to make the corresponding fluorine analogue of the Pt(II1) complex [NBu4]+[Pt(C6F,),]w- ere unsuccessful.
The X-ray structures of complexes 1-3 have been determined and are also reported in this aper. Complex
3 crystallizes in the tetragonal space group P4,lnbc (no. 1331, with a = b = 14.948 (6) c = 23.488 (9)
8, V = 5248 (3) %r3, and p(calcd) = 1.85 g cm-3 for 2 = 4. The structure has been refined to a final agreement
factor of R = 6.6%
ANALISIS PENGARUH KEPUASAN GAJI DAN PENGEMBANGAN KARIR TERHADAP KEPUASAN KERJA DAN DAMPAKNYA TERHADAP TURNOVER INTENTION KARYAWAN (Studi Pada Karyawan Kantor Pusat Bank Jateng)
Turnover intention is a serious problem and can not be taken lightly within a
company. In the current era of globalization, there are still many companies that
experience turnover intention problems, which causes many employees in the
company to decide to leave or move from the company where they work today. One of
the companies that experienced this problem was Bank Jateng. This research aims to
examine and analyze the effect of salary satisfaction and career development on job
satisfaction and to know the impact of both variables on turnover intention at PT.
Bank Jateng.
Data collecting method used in this research is a questionnaire with a sample
of 100 employees of the Central Bank headquarters. The technique of sampling in this
research using non-probability sampling method with purposive sampling technique,
by choosing the appropriate samples with the objects and problems to be developed
in the research.This research uses multiple linear regression analysis method to
analize the data obtained in the research.
The results of this study indicate that the variable of salary satisfaction and
career development have positive and significant impact on job satisfaction, both also
give negative and significant influence to turnover intention of employees of Bank
Central Java head office. Job satisfaction variable in this research, also give negative
and significant influence to turnover intention of employees of Bank Central Java
head office. These variables give effect of 28,8% to job satisfaction and 46,9% to
turnover intention. The remaining 71,2% for job satisfaction variation and 53,1% for
variation of turnover intention influenced by other variables outside this research.
From the result of path analysis showed that job satisfaction does not mediate the
effect of pay satisfaction on turnover intention with value of t table equal to 1,93,
while for career development variable proven to be mediated by job satisfaction with
t table equal to 5,41
Mekanisme Reaksi Asam Borat Dengan Produk Radiolisis Akibat Radiasi Sinar- Pada Temperatur 25oc
MEKANISME REAKSI ASAM BORAT DENGAN PRODUK RADIOLISIS AKIBAT RADIASI SINAR- PADA TEMPERATUR 25OC. Telah dilakukan simulasi yang bertujuan untuk memahami mekanisme reaksi antara asam borat (H3BO3) yang ditambahkan kedalam air pendingin primer PWR dengan produk radiolisis akibat radiasi dengan sinar- pada temperatur 25oC. Simulasi dilakukan dengan menggunakan perangkat lunak ‘Facsimile\u27 yang berbasis kinetika reaksi yang berkelanjutan. Sebagai masukan adalah set reaksi kimia yang terdiri dari 61 jenis reaksi dengan konstanta kecepatan reaksinya, nilai-G spesi radiolisis akibat radiasi sinar-, laju dosis 10 dan 104 Gy/s, konsentrasi awal oksigen yang berhubungan dengan sistem aerasi (0,25M), deaerasi dan konsentrasi asam borat hingga konsentrasi 1M. Luaran di program berupa seri Perubahan konsentrasi vs waktu iradiasi. Data luaran kemudian diolah menggunakan perangkat pembuat grafik ‘Origin\u27. Validasi dilakukan dengan membandingkannya dengan hasil simulasi sebelumnya. Hasil validasi menunjukkan perbedaan yang tidak signifikan, sehingga diputuskan bahwa set reaksi sekarang adalah valid. Penambahan asam borat menekan konsentrasi oksigen secara signifikan. Hubungan kenaikan logaritmik penambahan konsentrasi H3BO3 vs produk oksigen menunjukkan hubungan linear yang menurun. Dari hasil simulasi dapat dipahami bahwa penambahan H3BO3 tidak hanya mengatur reaktivitas neutron pada temperatur 25oC tetapi juga memberikan imbas positif didalam menekan konsentrasi produk oksigen yang memegang peran penting di dalam proses korosi
Development of genomic simple sequence repeat markers for yam
Yam (
Dioscorea
spp.) is a major staple crop
widely cultivated for its starchy tubers. To date,
very few marker resources are publicly avail
-
able as tools for genetic and genomic studies of
this economically important crop. In this study,
90 simple sequence repeat (SSR) markers were
developed from an enriched genomic library of
yellow Guinea yam (
D. cayenensis
Lam.). Cross-
amplification revealed that 85 (94.4%) and 51
(56.7%) of these SSRs could be successfully
transferred to the two major cultivated species
of
D. rotundata
Poir. and
D. alata
L., respec
-
tively. Polymorphisms in 30 markers selected
on the basis of reliability and reproducibility of
DNA bands were evaluated using a panel of 12
D. cayenensis
, 48
D. rotundata
, and 48
D. alata
accessions. Accordingly, number of alleles
per locus ranged from 2 to 8 in
D. cayenensis
(mean = 3.9), 3 to 30 in
D. rotundata
(mean =
13.9), and 2 to 22 in
D. alata
(mean = 12.1). The
average observed and expected heterozygosi
-
ties were 0.156 and 0.634 (
D. cayenensis
), 0.326
and 0.853 (
D. rotundata
), and 0.247 and 0.836
(
D. alata
), respectively. Clustering based on six
SSRs that were polymorphic in at least four of
the five cultivated
Dioscorea
species studied,
including
D. cayenensis
,
D. rotundata
,
D. alata
,
D. dumetorum
(Kunth) Pax., and
D. bulbifera
L.,
detected groups consistent with the phyloge
-
netic relationships of the species except for
D.
dumetorum
. These new SSR markers are invalu
-
able resources for applications such as genetic
diversity analysis and marker-assisted breedingYam (
Dioscorea
spp.) is a major staple crop
widely cultivated for its starchy tubers. To date,
very few marker resources are publicly avail
-
able as tools for genetic and genomic studies of
this economically important crop. In this study,
90 simple sequence repeat (SSR) markers were
developed from an enriched genomic library of
yellow Guinea yam (
D. cayenensis
Lam.). Cross-
amplification revealed that 85 (94.4%) and 51
(56.7%) of these SSRs could be successfully
transferred to the two major cultivated species
of
D. rotundata
Poir. and
D. alata
L., respec
-
tively. Polymorphisms in 30 markers selected
on the basis of reliability and reproducibility of
DNA bands were evaluated using a panel of 12
D. cayenensis
, 48
D. rotundata
, and 48
D. alata
accessions. Accordingly, number of alleles
per locus ranged from 2 to 8 in
D. cayenensis
(mean = 3.9), 3 to 30 in
D. rotundata
(mean =
13.9), and 2 to 22 in
D. alata
(mean = 12.1). The
average observed and expected heterozygosi
-
ties were 0.156 and 0.634 (
D. cayenensis
), 0.326
and 0.853 (
D. rotundata
), and 0.247 and 0.836
(
D. alata
), respectively. Clustering based on six
SSRs that were polymorphic in at least four of
the five cultivated
Dioscorea
species studied,
including
D. cayenensis
,
D. rotundata
,
D. alata
,
D. dumetorum
(Kunth) Pax., and
D. bulbifera
L.,
detected groups consistent with the phyloge
-
netic relationships of the species except for
D.
dumetorum
. These new SSR markers are invalu
-
able resources for applications such as genetic
diversity analysis and marker-assisted breedin
Environmental, Economical and Social Implication of Jatropha: A Systematic Review
Jatropha curcas: from leaves, latex, roots, and seeds different bioactive or commercially important ingredients have been extracted using different methods. Jatropha curcas L is a multipurpose plant and a member of the family Euphorb eaceae with several application and considerable potential. The plant produces many useful products, especially the seed, from which oil can be extracted; this oil can be used as a feed stock for biodiesel. The extracted oil can also be used for making soap, glue, dye, etc. The leaves shoot latex, roots and seed oil has medicinal properties. The fruit exo carp (coat), seed shell and processed seed cake are rich in nitrogen, phosphorous and potassium and can be used as fertilizer. Newly developed biotechnological processes related to the exploitation of J. curcas include the genetic improvement of the plant, biological pest control, enzyme-supported oil extraction, anaerobic fermentation of the press cake and the isolation of anti inflammatory substances and wound-healing enzymes. In General Jatropha curcas is a quick-growing and popular tree. It is a traditionally important medicinal plant and having various commercial applications. Keywords: Jatropha, Application, Economic, Extraction DOI: 10.7176/JRDM/74-01 Publication date:March 31st 202
Association between adherence to anti-diabetic therapy and adverse maternal and perinatal outcomes in diabetes in pregnancy
Objectives: To analyse the association between adherence to anti-diabetic therapy (diet, physical activity and medications) and perinatal outcomes.Methods: A cohort design was used. Participants were 157 pregnant women with diabetes, and the setting was Mbuya Nehanda and Chitungwiza Maternity Hospitals, Harare, Zimbabwe.Results: Main outcome measures were maternal and perinatal outcomes. Mean adherence to anti-diabetic therapy was 66.7%. Perinatal outcomes observed were hypertensive disorders (34.5%), Caesarean delivery (45.9%), maternal diabetic ketoacidosis (5.1%), maternal hypoglycaemia (15.9%), and candidiasis (19.7%). Neonatal outcomes were perinatal mortality (15.9%), low Apgar score at 1 minute (26.8%), low Apgar score at 5 minutes (24.8%), macrosomia (33.8%), neonatal hypoglycaemia (15.3%), and neonatal hyperbilirubinemia (7.6%). There were significant associations between adherence and Caesarean delivery (RR 1.9, 95% CI 1.28 to 2.81, p = 0.0014), candidiasis (RR 3.95, 95% CI 1.65 to 9.47, p = 0.002), low Apgar score at 1 minute (RR 2.15, 95% CI 1.16 to 3.98, p = 0.015) and at 5 minutes (RR 1.95, 95% CI 1.03 to 3.69, p = 0.039), and perinatal mortality (RR 3.08, 95% CI 1.11 to 8.52, p = 0.018).Conclusions: Adherence to anti-diabetic therapy was sub-optimal and was associated with some adverse perinatal outcomes. Promotion of adherence, through routine individualised counselling, monitoring and assessment, is vital to minimise adverse outcomes.Keywords: anti-diabetic therapy, diabetes, maternal outcomes, perinatal outcomes, pregnanc
Protective effect of the perchlorophenyl group in organophosphorus chemistry
The homoleptic phosphine with the bulky perchlorophenyl group, (C6Cl5)3P (1), exhibits trigonal pyramidal structure (TPY-3), yet considerably flattened: Σ(C–P–C') = 321.0(1)°. Key steric and electronic properties of this simple organophosphorus species have been estimated by calculation. Attending to its characteristic features, 1 can be rated as a deactivated phosphine, where the less-basic P atom is sterically shielded by the bulky C6Cl5 groups. This marked inertness notwithstanding, it has been possible to obtain (under harsh conditions) derivatives with phosphorus in high oxidation state, namely the phosphine oxide (C6Cl5)3PO (2) and the difluorophosphorane (C6Cl5)3PF2 (3). These four- and five-substituted derivatives respectively exhibit trigonal pyramidal (TPY-4) and trigonal bipyramidal (TBPY-5) structures. The Σ(C–P–C') value steadily increases along the series 1–3, according to the referred structural variation. The P–C bond length is, in turn, invariably maintained at about 185 pm regardless of the different oxidation state, the increasing number of substituents around the P atom and the overall geometry. The hypervalent difluorophosphorane (C6Cl5)3PF2 (3) dissociates one of the axial fluorides in the gas phase.Graphical abstract: The perchlorophenyl group, C6Cl5, exerts a protective effect on the P center in a series of related organophosphorus deriva-tives with various geometries (see figure), as established by experimental and theoretical methods.giving rise to the fluorophosphonium cation [(C6Cl5)3PF]+, as detected by mass spectrometry. This cation is identified as a Lewis superacid
New Insights into Trifluoromethyl Gold Chemistry
Se ha realizado un estudio exhaustivo de la química de trifluorometil complejos de oroque contienen entre uno y tres grupos CF3. Con ese objetivo, se han preparado loscomplejos de oro(I) [PPh4][CF3AuX] (X = Cl, Br, I), que son oxidados fácilmente porhalógenos, X2, para dar lugar a los complejos [PPh4][CF3AuX3] correspondientes.Mediante espectrometría de masas en tándem, los primeros conducen a los anionesmixtos [F−Au−X]− a través de la extrusión de CF2 en fase gas, mientras que los aniones[AuIIX3]− (X = Cl, Br) se generan por homólisis del enlace Au−C en los complejos deAu(III). Por reacción de [PPh4][CF3AuCF3] con XeF2 se ha preparado y caracterizadototalmente el primer difluoruro organometálico de oro(III) con disposición trans,[PPh4][trans-(CF3)2AuF2]. El estudio de la descomposición unimolecular del anión[trans-(CF3)2AuF2]− ha permitido detectar las especies [CF3AuFx]– (x = 1, 2, 3) en fasegas, así como los aniones [AuIIF3]− y [AuIF2]− en etapas posteriores del experimento.Además, los ligandos fluoruro en el complejo [PPh4][trans-(CF3)2AuF2] son sustituidosfácilmente por los halogenuros más pesados y por cianuro, con retención de laestereoquímica. De hecho, por comparación de las estructuras cristalinas de las especiesisolépticas e isomorfas [PPh4][trans-(CF3)2M(CN)2] (M = Ag, Au), se pudo concluirque Au(III) y Ag(III) tienen radios covalentes similares en su geometría plano cuadrada.La obtención del complejo [PPh4][(CF3)3AuI] por fotoadición oxidante de CF3I sobre[PPh4][CF3AuCF3] constituye la ruta de acceso más apropiada al fragmento (CF3)3Au.Esta especie de Au(III) abre la puerta a la síntesis de diferentes derivados aniónicos,cuyos análogos [(CH3)3AuX]− no se conocen. Además, se ha preparado el análogofluorado del trimetil oro, (CF3)3Au·OEt2, que es un sintón adecuado de la especieinsaturada de 14 electrones (CF3)3Au. Este fragmento es el ácido de Lewis R3Au (R =grupo organilo) más fuerte descrito hasta la fecha. Esta unidad (CF3)3Au, que presentaforma de T, se caracteriza por una marcada estabilidad estereoquímica y una bajatendencia a la eliminación reductora de CF3–CF3, contrariamente al comportamientoobservado para el análogo no fluorado (CH3)3Au. También se han preparado ycaracterizado diversos complejos neutros con ligandos de diferente capacidad dadora ydistintos átomos dadores, que presentan una estabilidad muy superior a sus análogos nofluorados. Los complejos aniónicos de Au(III) descritos presentan vías dedescomposición distintas en fase gas, donde solo ocurren procesos unimoleculares, y enfase condensada, donde son posibles caminos intermoleculares de menor energía.<br /
Terminal Au-N and Au-O Units in Organometallic Frames
Since gold is located well beyond the oxo wall, chemical species with terminal Au−N and Au−O units are extremely rare and limited to low coordination numbers. We report here that these unusual units can be trapped within a suitable organometallic frame. Thus, the terminal auronitrene and auroxyl derivatives [(CF3)3AuN]− and [(CF3)3AuO]− were identified as local minima by calculation. These open-shell, high-energy ions were experimentally detected by tandem mass spectrometry (MS2): They respectively arise by N2 or NO2 dissociation from the corresponding precursor species [(CF3)3Au(N3)]− and [(CF3)3Au(ONO2)]− in the gas phase. Together with the known fluoride derivative [(CF3)3AuF]−, they form an interesting series of isoleptic and alloelectronic complexes of the highly acidic organogold(iii) moiety (CF3)3Au with singly charged anions X− of the most electronegative elements (X=F, O, N). Ligand-field inversion in all these [(CF3)3AuX]− species results in the localization of unpaired electrons at the N and O atoms
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