1997 ◽  
Vol 12 (4) ◽  
pp. 225-229
Author(s):  
Cart-in A-S. Gustavsson ◽  
Chritofer T. Lindgren ◽  
Mikael E. Lindström

Abstract The amount of lignin reacting according to the slow residual phase, i.e. the residual phase lignin, is in many perspectives an interesting issue. The purpose of the present investigation was to develop a mathematical model to show how the amount of residual phase lignin in the kraft cooking of spruce chips (Picm ahies) depends on the conditions in the earlier phases of the cook. The variables studied were hydroxide ion concentration, hydrogen sulfide ion concentration and ionic strength. The liquor-to-wood ratio during pulping was very high to maintain approximately constant chemical concentrations throughout each experiment (so called "constant composition" cooks). An increase in hydroxide ion concentration andtor hydrogen sulfide ion concentration leads to a decrease in the amount of residual phase lignin, while an increase in ionic strength, i.e. sodium ion concentration, leads to an increase. A signiticant result is that the hydrogen sulfide ion concentration has a pronounced influence on the amount of residual phase lignin during a cook at a low hydroxide ion concentration. The amount of residual phase lignin expressed as % lignin on wood, L,, can be described by the following equation developed for "constant composition" cooks (when cooking with a constant sodium ion concentration of 2 mol/L): LT=0,55-0.32*[HO-](-1,3)*ln[HS-] This equation is valid for a concentration of HO- in the range from 0.17 to 1.4, and a hydrogen sulfide ion concentration from 0.07 to 0.6 mol/L.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Unathi Skosana ◽  
Mark Tame

AbstractWe report a proof-of-concept demonstration of a quantum order-finding algorithm for factoring the integer 21. Our demonstration involves the use of a compiled version of the quantum phase estimation routine, and builds upon a previous demonstration. We go beyond this work by using a configuration of approximate Toffoli gates with residual phase shifts, which preserves the functional correctness and allows us to achieve a complete factoring of $$N=21$$ N = 21 . We implemented the algorithm on IBM quantum processors using only five qubits and successfully verified the presence of entanglement between the control and work register qubits, which is a necessary condition for the algorithm’s speedup in general. The techniques we employ may be useful in carrying out Shor’s algorithm for larger integers, or other algorithms in systems with a limited number of noisy qubits.


2012 ◽  
Vol 554-556 ◽  
pp. 1913-1918
Author(s):  
Feng Liu ◽  
Ji Wei Hu ◽  
Xian Fei Huang ◽  
Jing An Chen ◽  
Li Ya Fu ◽  
...  

Assessment of the pollution for the selected six heavy metals (Pb, Cu, Zn, Fe, Mn and Ni) in ten surface sediments sampled from Aha Lake in a dry season was made in the present investigation. Principal component analysis (PCA) was used to assess the sources of the heavy metals contamination and two components were extracted. Analysis of the lake characteristics and point source pollution revealed that the discharge of industrial effluent and coal mining wastewater were the possible sources of these heavy metals contamination. Based on the speciation characteristics of heavy metals in sediments, the method ratio of secondary phase to primary phase (RSP) was applied to evaluate the loadings and the bioavailability of these heavy metals. The RSP evaluation exhibited that Pb, Zn, Fe, Mn and Ni were mainly associated with Fe-Mn oxides besides residual phase, while Cu mainly existed in organic phase and residual phase. In summary, the potential risk posed to the lake caused by the heavy metals was high and descended in the order of Mn > Ni > Zn > Pb > Cu > Fe.


2019 ◽  
Vol 6 (2) ◽  
pp. 3437-3447 ◽  
Author(s):  
Abdullah Zubair Mohammed ◽  
Ajay Kumar Nain ◽  
Jagadish Bandaru ◽  
Ajay Kumar ◽  
D. Santhosh Reddy ◽  
...  

1993 ◽  
Vol 8 (1) ◽  
pp. 7-13 ◽  
Author(s):  
S Dollfus ◽  
M Petit ◽  
JF Menard ◽  
P Lesieur

SummaryThe concordance and degree of overlap between 13 diagnostic systems for schizophrenia, including the five European systems of Berner, Bleuler, Langfeldt, Pull and Schneider, were evaluated in a cross-sectional study (N = 51) taking the phase of illness (acute or residual) into account. The diagnostic assessments were processed by computer using a 183-item standardised checklist and a data-processing program in GW-Basic language. The inter-rater reliability, as assessed by Kappa coefficient, was good to excellent for each diagnostic system established by this method (K from 0.5 to 1). When comparing the concordance between pairs of 13 diagnostic systems for schizophrenia in acute and residual phase groups, results showed that only two significant relationships were not influenced by the phase of illness (Carpenter x RDC; Catego x Schneider), while 24 were. These included only two relationships in the acute group (Carpenter Catego; Carpenter Schneider) and 22 links between pairs of systems in the residual group. In the acute group, no diagnosis of schizophrenia, including duration criteria such as those of DSM III-R, Feighner, Langfeldt, Pull and RDC, was linked to other systems. In the residual group, the operational systems such as Catego, DSM III-R, Feighner, Newhaven, Pull and RDC had more than five relationships with the other systems whereas the non-operational systems of Bleuler, ICD9, Langfeldt and Schneider had less than four relationships with the others. Except Pull's criteria, the European diagnostic systems, in particular Berner's and Bleuler's, seemed to differ from the others because of the few relationships displayed. The results underline the importance of taking the phase of illness into account when comparing between studies utilizing different diagnostic systems for schizophrenia. They also show the relationships between European and international diagnostic systems, insufficiently established so far.


2019 ◽  
Vol 38 (03) ◽  
Author(s):  
Birhanu Tsegaw ◽  
Rita Singh Majumdar

Milk is produced by the mammary gland of mammals to feed their young ones. Milk is an important nutrient-rich beverage that benefits our health. This article aims to study the effect of Asparagus racemosus root powder on milk yield and milk composition. The experiment was performed to determine the milk yield and milk protein, fat, total milk solid, and milk acidity after using Asparagus racemosus as a food supplement. The animals were selected based on purposive sampling to select lactate buffalo to avoid or reduced the error. During the experiment, animals fed in three phases; control, treatment, and the residual phase. In control phase animal diet normal ration, whereas in the treatment phase, a buffalo was diet 120 gram of Asparagus racemosus root powder in addition to its normal diet per buffalo per day. While in the residual phase, the animal was diet only normal ration. Each phase has been 5 days. The Milk collected from lactating buffalo in three phases; control, treatment, and the residual period. Each period has been five day. We also measured milk yield per day per buffalo. About 50 ml of milk was collected from each five buffalo every morning for 15 days. The data was analyzed through one way ANOVA and T-test using the procedure of statistical software. The result indicates that the diet was statistically significant effecting on milk yield at 5% (0.0196), protein at 1% (0.0113) and fat at 1% (0.0007) while the insignificant effect on milk acidity p >30 (0.3909) and total solid p >80 (0.8904). Therefore, feeding Asparagus racemosus, positively affects milk yield and milk protein and milk fat content.


2002 ◽  
Vol 25 ◽  
pp. 99-124
Author(s):  
Julio Cezar Mendes ◽  
Cristina Maria Wiedemann ◽  
Ian McReath

An irregular and narrow ring of charnoenderbites and norite envelopes gabbros and syenomonzonites in the Venda Nova inversely zoned pluton, Espírito Santo. The former have an almost massive structure, with foliation only locally well marked. The norite is a fine-grained cumulatic rock with granular hypidiomorphic to intergranular texture. The medium-grained charnoenderbites comprise enderbites, Opx-quartzdiorites and Opx-granodiorites. They are leucocratic to mesocratic with granular hypidiomorphic to porphyritic texture. Ortho and clinopyroxene are present in the both lithotypes. Subsolidus textures occur in the norite and charnoenderbites. The whole rock chemistry separates two different sequences: a basic one, with tholeiitic affinities, correspond to the noritic cumulate, and an intermediary one, medium-K calc-alkaline, comprising the charnoenderbites. They show clearly different chemical signature when compared to the alkalic affinity rocks of the inner domain of the pluton. Both the sequences have similar geochemical characteristics: they are metaluminous, Ca, Fe and Al enriched, and have low to moderate incompatible elements contents. Normal to depleted mantle protolith is inferred for both sequences, and garnet probably was a residual phase during the mantle partial melting.


1993 ◽  
Vol 8 (3) ◽  
pp. 131-137 ◽  
Author(s):  
S Dollfus ◽  
M Petit ◽  
JF Menard ◽  
P Lesieur

SummaryThe stability of symptomatology and of eleven schizophrenic diagnostic systems was studied in patients initially in an acute phase (group 1) compared to patients in a residual phase (group 2). The patients were evaluated over a period of 1 year with a standardized checklist and PANSS in both groups. The number of patients included by the Carpenter, Calego, 1CD9, New-Haven, Schneider and Vienne systems decreased significantly between admission and discharge in group 1, whereas no variation was observed in group 1 between discharge and one year later, or in group 2 over a period of 1 year. The instability of schizophrenic diagnostic systems such as New-Haven, Schneider and Vienne could be due to the variation of positive or general symptomatology. The number of patients included by Feighner or Langfeldt did not vary significantly between admission and discbarge in group 1, in spite of a significant decrease in symptomatology, probably because certain criteria, such as duration of illness, hindered the systems from changing. The results showed the importance of specifying in every study on schizophrenia the time of inclusion (admission, discharge) or the phase of illness (acute or residual phase).


2009 ◽  
Vol 52 (2) ◽  
pp. 292-295
Author(s):  
Nicolas A. Shtin ◽  
José Mauricio López Romero
Keyword(s):  

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