A Study on the Activity of Lactate Dehydrogenase in Zabrotes subfasciatus (Boh.)

Yoo, C.M,Kaur, S.P.,Sidhu, D.S.,Dhillon, S.S.,Kumar, N. 한국곤충학회 1985 Korean journal of entomology Vol.15 No.1

인도콩바구미(Zabrotes subfasciatus)의 발생 및 변태단계에 따라 젖산탈수소효소의 활성도를 측정한 결과는 다음과 같다. 1. 4령 유충에서 활성도는 증가추세를 나타내었는데, 이는 혐기적 호흡 수준의 증가를 반영하는 것이며, 전용기동안에는 계속 감소 추세를 나타내었다. 2. 용 초기에 낮은 효소 활성 수준이 관찰되었음은 혐기적 호흡의 요구도가 감소됨을 암시하는 것이며, 이 현상은 가용성 단백진 수준의 증가에 따라 효소활성이 증가하는 용 중기까지 지속되었다. 그리고 용후기에 효소의 활성도는 다시 감소되었는데, 이는 아마도 유충의 근육조직의 해소와 성충 비상근의 형성에 따른 현상인 것 같다. 3. 성충기의 효소 활성도는 암, 수에서 모두 우화 후 60시간 동안에는 증가되다가, 그 후 24시간 동안에는 감소되었다. 이러한 현상은 교미 및 산란과정과 관련된 것으로 여겨지며, 성충 말기에는 효소의 농도가 급속히 상승되었다. 그리고 암, 수간의 활성도의 차이가 관찰되었는데, 수컷이 암컷보다 약간 높았다. The activity of lactate detydrogenase during the development and metamorphosis has been estimated in Zabrotes subfasciatus. The lactate detydrogenase (LDH) activity shows an upward trend and consequently an enhanced level of anaerobic respiration in the fourth instar larva. In the prepupa, the LDH activity exhibits a reducing trend which continues even at the incidence of larval-pupal ecdysis. The low level of LDH-activity during early pupal life is indicative of the dwindling need for anaerobic respiration at this stage, which ceases by the time, midpupal life approaches, when the LDH-activity shows an increased rate of manifestation along with higher level of soluble proteins. Once again, during the later part of pupal life, LDH-activity gets attenuated, which probably reflects the destruction of larval musculature and the formation of the adult flight muscles. After emergence, the LDH-activity increases during the first 60 hours of adult, which subsequently declines during the next 24 hours in both the sexes, which is attributable to the involvement of LDH isozymes to support the process of copulation and oviposition in males and females respectively. In the late adult life, the LDH concentration gets elevated rapidly. The male bruchids have somewhat more LDH activity than the female.

The sdB pulsating star V391 Peg and its putative giant planet revisited after 13 years of time-series photometric data

Silvotti, R.,Schuh, S.,Kim, S.-L.,Lutz, R.,Reed, M.,Benatti, S.,Janulis, R.,Lanteri, L.,Østensen, R.,Marsh, T. R.,Dhillon, V. S.,Paparo, M.,Molnar, L. Springer-Verlag 2018 Astronomy and astrophysics Vol.611 No.-

<P>V391 Peg (alias HS 2201+2610) is a subdwarf B (sdB) pulsating star that shows both <I>p</I>- and <I>g</I>-modes. By studying the arrival times of the <I>p</I>-mode maxima and minima through the O-C method, in a previous article the presence of a planet was inferred with an orbital period of 3.2 years and a minimum mass of 3.2 <I>M</I>Jup. Here we present an updated O-C analysis using a larger data set of 1066 h of photometric time series (~2.5× larger in terms of the number of data points), which covers the period between 1999 and 2012 (compared with 1999-2006 of the previous analysis). Up to the end of 2008, the new O-C diagram of the main pulsation frequency (<I>f</I>1) is compatible with (and improves) the previous two-component solution representing the long-term variation of the pulsation period (parabolic component) and the giant planet (sine wave component). Since 2009, the O-C trend of <I>f</I>1 changes, and the time derivative of the pulsation period (<I>p</I><SUP>.</SUP>) passes from positive to negative; the reason of this change of regime is not clear and could be related to nonlinear interactions between different pulsation modes. With the new data, the O-C diagram of the secondary pulsation frequency (<I>f</I>2) continues to show two components (parabola and sine wave), like in the previous analysis. Various solutions are proposed to fit the O-C diagrams of <I>f</I>1 and <I>f</I>2, but in all of them, the sinusoidal components of <I>f</I>1 and <I>f</I>2 differ or at least agree less well than before. The nice agreement found previously was a coincidence due to various small effects that are carefully analyzed. Now, with a larger dataset, the presence of a planet is more uncertain and would require confirmation with an independent method. The new data allow us to improve the measurement of <I>p</I><SUP>.</SUP> for <I>f</I>1 and <I>f</I>2: using only the data up to the end of 2008, we obtain <I>p</I><SUP>.</SUP>1 = (1.34 ± 0.04) × 10<SUP>−12</SUP> and <I>p</I><SUP>.</SUP>2 = (1.62 ± 0.22) × 10<SUP>−12</SUP>. The long-term variation of the two main pulsation periods (and the change of sign of <I>p</I><SUP>.</SUP>1) is visible also in direct measurements made over several years. The absence of peaks near <I>f</I>1 in the Fourier transform and the secondary peak close to <I>f</I>2 confirm a previous identification as <I>l</I> = 0 and <I>l</I> = 1, respectively, and suggest a stellar rotation period of about 40 days. The new data allow constraining the main <I>g</I>-mode pulsation periods of the star.</P>

Positioning errors and quality assessment in panoramic radiography

Dhillon, Manu,Raju, Srinivasa M.,Verma, Sankalp,Tomar, Divya,Mohan, Raviprakash S.,Lakhanpal, Manisha,Krishnamoorthy, Bhuvana Korean Academy of Oral and Maxillofacial Radiology 2012 Imaging Science in Dentistry Vol.42 No.4

Purpose: This study was performed to determine the relative frequency of positioning errors, to identify those errors directly responsible for diagnostically inadequate images, and to assess the quality of panoramic radiographs in a sample of records collected from a dental college. Materials and Methods: This study consisted of 1,782 panoramic radiographs obtained from the Department of Oral and Maxillofacial Radiology. The positioning errors of the radiographs were assessed and categorized into nine groups: the chin tipped high, chin tipped low, a slumped position, the patient positioned forward, the patient positioned backward, failure to position the tongue against the palate, patient movement during exposure, the head tilted, and the head turned to one side. The quality of the radiographs was further judged as being 'excellent', 'diagnostically acceptable', or 'unacceptable'. Results: Out of 1,782 radiographs, 196 (11%) were error free and 1,586 (89%) were present with positioning errors. The most common error observed was the failure to position the tongue against the palate (55.7%) and the least commonly experienced error was patient movement during exposure (1.6%). Only 11% of the radiographs were excellent, 64.1% were diagnostically acceptable, and 24.9% were unacceptable. Conclusion: The positioning errors found on panoramic radiographs were relatively common in our study. The quality of panoramic radiographs could be improved by careful attention to patient positioning.

Positioning errors and quality assessment in panoramic radiography

Manu Dhillon,Srinivasa M Raju,Sankalp Verma,Divya tomar,Raviprakash S Mohan,Manisha Lakhanpal,Bhuvana Krishnamoorthy 대한구강악안면방사선학회 2012 Imaging Science in Dentistry Vol.42 No.4

Purpose: This study was performed to determine the relative frequency of positioning errors, to identify those errors directly responsible for diagnostically inadequate images, and to assess the quality of panoramic radiographs in a sample of records collected from a dental college. Materials and Methods: This study consisted of 1,782 panoramic radiographs obtained from the Department of Oral and Maxillofacial Radiology. The positioning errors of the radiographs were assessed and categorized into nine groups: the chin tipped high, chin tipped low, a slumped position, the patient positioned forward, the patient positioned backward, failure to position the tongue against the palate, patient movement during exposure, the head tilted, and the head turned to one side. The quality of the radiographs was further judged as being ‘excellent’, ‘diagnostically acceptable’, or ‘unacceptable’. Results: Out of 1,782 radiographs, 196 (11%) were error free and 1,586 (89%) were present with positioning errors. The most common error observed was the failure to position the tongue against the palate (55.7%) and the least commonly experienced error was patient movement during exposure (1.6%). Only 11% of the radiographs were excellent, 64.1% were diagnostically acceptable, and 24.9% were unacceptable. Conclusion: The positioning errors found on panoramic radiographs were relatively common in our study. The quality of panoramic radiographs could be improved by careful attention to patient positioning.

Pediatric Femoral Neck Fractures: Our 10 Years of Experience

Kamal Bali,Pebam Sudesh,Sandeep Patel,Vishal Kumar,Uttam Saini,M. S. Dhillon 대한정형외과학회 2011 Clinics in Orthopedic Surgery Vol.3 No.4

Background: Femoral neck fractures are rare injuries in children, but the high incidence of long term complications make it animportant clinical entity. The aim of this retrospective study was to analyze the clinical outcomes of pediatric femur neck fracturesthat we managed over a 10 year period. Methods: The study included 36 children (20 boys and 16 girls) who sustained femoral neck fractures and completed a minimumfollow-up of one year. The children were treated either conservatively, or by open reduction and internal fi xation (ORIF), or closedreduction and internal fi xation (CRIF). The outcomes were analyzed using Ratliff criteria and a detailed record of complicationswas kept for all patients. Results: The mean age of included patients was 10 years (range, 3 to 16 years) and the average follow-up was 3.2 years (range,1.1 to 8.5 years). Based on Delbet’s classifi cation system, there were 0 type I (transepiphyseal), 16 type II, 11 type III, and 9 type IVfractures. There were 8 undisplaced fractures, 4 of which later displaced after being managed initially in a hip spica. A satisfactoryoutcome was obtained in 27 (75%) children. Avascular necrosis (AVN) was the most common complication. It was seen in7 of our patients, all of whom had an unsatisfactory outcome. Other complications included three cases each of coxa vara, nonunion,and arthritic changes; and one case each of infection, primary screw perforation of head, and premature epiphyseal closure. Complications were lowest in the group treated by ORIF. Only 2 patients managed exclusively by conservative treatment ultimatelyachieved a satisfactory outcome. Conclusions: We believe that internal fi xation of pediatric femoral neck fractures is preferred whenever feasible because conservativetreatment carries a high risk of failure of reduction. Aggressive operative treatments aimed at anatomical reduction shouldbe the goal and there should be no hesitation in choosing ORIF over CRIF. Outcome of patients is infl uenced primarily by developmentof AVN which occurs as an independent entity without much relation to the mode of treatment carried out.