Experimental and Computational Studies on RuII -Catalyzed C7-Allylation of Indolines with Allyl Bromide

The selective C7-allylation of indolines with allyl bromide under ruthenium catalysis has been revealed here. Under established reaction conditions, C7-allylation of various indolines, including drug compounds, was accomplished with good selectivity and yields. Based on combined experimental and density functional theory (DFT) studies, the olefin insertion route was energetically favorable among four possible pathways. Experimental and DFT studies further revealed that the C-H activation is a reversible rate-limiting step.

Photoredox Minisci-Type Hydroxyfluoroalkylation of Isoquinolines with N-Trifluoroethoxyphthalimide

A straightforward photocatalytic approach has been demonstrated to incorporate a trifluoroethanol unit onto the isoquinolines. Herein, we report N-trifluoroethoxyphthalimide as a hydroxyfluoroalkyl radical precursor, enabling efficient synthesis of trifluoroethanol-substituted heteroarenes. Radical quenching experiments confirmed the involvement of a free-radical pathway under developed photocatalytic conditions. The DFT calculations confirmed the intramolecular 1,2-HAT reactivity of the O-centered trifluoroethoxy radical (generated from N-trifluoroethoxyphthalimide under photocatalytic condition) to the C-centered trifluoroethanol radical. Fluorescence quenching studies suggested that isoquinoline was responsible for the quenching of Ir-photocatalyst emission. A catalytic cycle involving trifluoroethanol radical reaction with isoquinolines has been proposed.

Predictable site-selective functionalization: Promoter group assisted para-halogenation of N-substituted heteroaromatics under metal-free condition

Herein, regioselective para-C-H halogenation of N-pyrimidyl (hetero)aromatics through S_EAr (electrophilic aromatic substitution) type reaction is disclosed. S_EAr type reaction has been utilized for the C5-bromination of indolines (para-selective) with N-bromosuccinimide under metal and additive-free conditions in good to excellent yields. The developed methodology is also applicable for iodination and challenging chlorination. The pyrimidyl group is identified as a reactivity tuner that also controls the regioselectivity. The present method is also applicable for selective halogenation of aniline, pyridine, indole, oxindole, pyrazole, tetrahydroquinoline, isoquinoline, and carbazole. DFT studies such as Fukui nucleophilicity and natural charge maps also support the observed p-selectivity. Post-functionalization of the title compound into the corresponding arylated, olefinated, and dihalogenated products is achieved in a one-pot, two-step fashion. Late-stage C-H bromination was also executed on drug/natural molecules (harmine, etoricoxib, clonidine, and chlorzoxazone) to demonstrate the applicability of the developed protocol.

Nurturing Care Interventions for Realizing the Development Potential of Every Child: From Pilot to Scale Up in Maharashtra

The WHO-UNICEF nurturing care framework (NCF) for early childhood development provides a roadmap for action, focusing on pregnancy and the first three years of life. It emphasizes the need to invest in capacity building and empowerment of service providers, families and communities to create a conducive environment that promotes child development. We describe our experience of implementing nurturing care interventions, beginning with a pilot project in Maharashtra covering a population of 10000 to and scaling it up to a model called Aarambh (the beginning), catering to a population of 1,500,000. Opportunities available within the existing services across multiple sectors were used; Integrated Child Development Services (ICDS) scheme, the health sector, and others. It utilized multiple approaches for promoting NCF within families; home visits by frontline workers (FLWs), mothers' meetings, growth monitoring and promotion sessions, and community-based events as key opportunities. Joint training for FLWs, establishing supervisors of FLWs as their trainers, and an interactive training curriculum were critical elements identified for the success of the model. An environment of appreciation for the FLWs and their supervisors helped build their confidence and helped them own the interventions.

C70 Fullerene Catalyzed Photoinduced Aerobic Oxidation of Benzylamines to Imines and Aldehydes

C₇₀ fullerene catalyzed photoinduced oxidation of benzylic amines at ambient conditions has been explored here. The developed strategy's main feature includes the additive/oxidant-free conversion of benzylic amine to corresponding imine and aldehydes. The reaction manifests broad substrate scope with excellent function group leniency and is applicable up to the gram scale. Further, symmetrical secondary amines can also be synthesized from benzylic amine in a one-pot two-step process. Various experiments and density functional theory studies revealed that the current reaction involves the generation of reactive oxygen species, single electron transfer reaction, and benzyl radical formation as key steps under photocatalytic conditions.

In silico approach for identifying natural lead molecules against SARS-COV-2

The life challenging COVID-19 disease caused by the SARS-CoV-2 virus has greatly impacted smooth survival worldwide since its discovery in December 2019. Currently, it is one of the major threats to humanity. Moreover, any specific drug or vaccine unavailability against COVID-19 forces to discover a new drug on an urgent basis. Viral cycle inhibition could be one possible way to prevent the further genesis of this viral disease, which can be contributed by drug repurposing techniques or screening of small bioactive natural molecules against already validated targets of COVID-19. The main protease (M^pro) responsible for producing functional proteins from polyprotein is an important key step for SARS-CoV-2 virion replication. Natural product or herbal based formulations are an important platform for potential therapeutics and lead compounds in the drug discovery process. Therefore, here we have screened >53,500 bioactive natural molecules from six different natural product databases against M^pro (PDB ID: 6LU7) of COVID-19 through computational study. Further, the top three molecules were subjected to pharmacokinetics evaluation, which is an important factor that reduces the drug failure rate. Moreover, the top three screened molecules (C00014803, C00006660, ANLT0001) were further validated by a molecular dynamics study under a condition similar to the physiological one. Relative binding energy analysis of three lead molecules indicated that C00014803 possess highest binding affinity among all three hits. These extensive studies can be a significant foundation for developing a therapeutic agent against COVID-19 through vet lab studies.

β Decay of ^{61}V and its Role in Cooling Accreted Neutron Star Crusts

The interpretation of observations of cooling neutron star crusts in quasipersistent x-ray transients is affected by predictions of the strength of neutrino cooling via crust Urca processes. The strength of crust Urca neutrino cooling depends sensitively on the electron-capture and β-decay ground-state-to-ground-state transition strengths of neutron-rich rare isotopes. Nuclei with a mass number of A=61 are predicted to be among the most abundant in accreted crusts, and the last remaining experimentally undetermined ground-state-to-ground-state transition strength was the β decay of ^{61}V. This Letter reports the first experimental determination of this transition strength, a ground-state branching of 8.1_{-3.1}^{+4.0}%, corresponding to a log ft value of 5.5_{-0.2}^{+0.2}. This result was achieved through the measurement of the β-delayed γ rays using the total absorption spectrometer SuN and the measurement of the β-delayed neutron branch using the neutron long counter system NERO at the National Superconducting Cyclotron Laboratory at Michigan State University. This method helps to mitigate the impact of the pandemonium effect in extremely neutron-rich nuclei on experimental results. The result implies that A=61 nuclei do not provide the strongest cooling in accreted neutron star crusts as expected by some predictions, but that their cooling is still larger compared to most other mass numbers. Only nuclei with mass numbers 31, 33, and 55 are predicted to be cooling more strongly. However, the theoretical predictions for the transition strengths of these nuclei are not consistently accurate enough to draw conclusions on crust cooling. With the experimental approach developed in this work, all relevant transitions are within reach to be studied in the future.

Regioselective Arylation of Quinoline N-Oxides (C8), Indolines (C7) and N-tert-Butylbenzamide with Arylboronic Acids

Herein, we disclose Ru(II)-catalyzed regioselective distal C(sp2)-H arylation of quinoline N-oxide with arylboronic acids to 8-arylquinolines. In the developed method, the Ru(II)-catalyst shows dual activity, that is, distal C-H activation of quinoline N-oxides followed by in situ deoxygenation of arylated quinoline N-oxide in the same pot. The current catalytic method features use of Ru metal as the catalyst and arylboronic acids as the arylating source under mild reaction conditions. Use of the Rh(III)-catalyst in place of Ru(II) under the same conditions afforded 8-arylquinoline N-oxides with excellent regioselectivity. Furthermore, the developed Ru(II) catalytic system is also extended for the C(sp2)-H arylation of indolines, N-tert-butylbenzamide, and 6-(5H)-phenanthridinone. Formation of the quinoline N-oxide coordinated ruthenium adduct is found to be the key reaction intermediate, which has been characterized by single crystal X-ray diffraction and NMR spectroscopy.

Strained epitaxial interfaces of metal (Pd, Pt, Au) overlayers on nonpolar CdS ([Formula: see text]) surfaces from first-principles

The depositions of (1 1 1) and (1 0 0) overlayers of Pd, Pt and Au on the CdS (1 0 [Formula: see text] 0) surface are studied within epitaxial mismatches of 6%-7%, using spin-polarized density functional theory. For both compressively strained and tensile-strained interfaces, the (1 0 0) overlayers were found to be thermodynamically more stable owing to better interfacial matching, and higher surface uncoordination resulting in higher reactivity. Pt(1 1 1) exhibits slip dislocations even for five-atomic-layer thick Pt slabs. Along with the leading metal-S interaction, the interfacial charge transfers indicate a weak metal-Cd interaction which decreases in strength in the order Pd  >  Pt  ∼  Au. For the same substrate area, the accumulation of electronic charge for Pt overlayers is  ∼1.5-2 times larger than that of Pd and Au. The n-type Schottky barriers of Au overlayers with the minimum mismatch are within 0.1 eV of the predictions of Schottky-Mott rule, indicating a relatively ideal, scantily reactive interface structure. This is in clear contrast to the Pt epitaxial overlayers which deviate by 0.6-0.8 eV.

Validating the MUAC (Mid-upper arm circumference) Cut-off for Detection of Severe Acute Malnutrition in Children Aged 6-59 Months in Rural Maharashtra

OBJECTIVE

To review the Mid-upper arm circumference (MUAC) cut-off currently being used to identify Severe Acute Malnutrition (SAM) as currently defined using Weight-for-Height.

METHODS

Cross-sectional study conducted in 24 villages of a Primary Health Centre in Wardha district of Maharashtra among 2650 children between the ages of 6 to 59 months.

RESULTS

For identifying SAM, sensitivity of MUAC was 23.5% and specificity was 99.7% for cut-off <11.5 cm. Using Youden index, best Mid-upper arm circumference cut-off point to identify SAM was <13 cm with sensitivity of 74.5% and specificity of 92.7%. Using Receiver operating characteristics curve, best MUAC cut-off point was 12.8 cm with 74.5% sensitivity and 92.7% specificity. Area under curve was 0.88 (95%CI: 0.85-0.91).

CONCLUSION

The current MUAC cut-off of <11.5 cm for detecting SAM needs to be increased to ensure that children, who need referral for management of malnutrition, are not missed.

Esophageal histoplasmosis in a renal allograft recipient

Histoplasmosis is a progressive granulomatous disease caused by the intracellular dimorphic fungus Histoplasma capsulatum. We report a rare case of esophageal histoplasmosis in a renal allograft recipient. A 55-year-old male who received a live, unrelated renal allograft 20 years ago presented with complaints of recurrent fever for ten to 12 months, weight loss over six months, progressive dysphagia more for solids for five to six months and joint pain and swelling involving the bilateral metacarpo-phalangeal and proximal interphalangeal joints. Biopsy from the esophageal ulcers revealed dense inflammation infiltrated with lymphocytes and macrophages with clusters of strongly positive intracellular fungal spores with a clear area or "halo-like" zone suggestive of Histoplasma capsulatum invasion. The patient was treated with intravenous liposomal amphotericin B for ten days and later switched over to oral itraconazole. Repeated endoscopy revealed significant improvement of the lesions.

Time-of-flight mass measurements for nuclear processes in neutron star crusts

We present results from time-of-flight nuclear mass measurements at the National Superconducting Cyclotron Laboratory that are relevant for neutron star crust models. The masses of 16 neutron-rich nuclei in the scandium-nickel range were determined simultaneously, with the masses of (61)V, (63)Cr, (66)Mn, and (74)Ni measured for the first time with mass excesses of -30.510(890) MeV, -35.280(650) MeV, -36.900(790) MeV, and -49.210(990) MeV, respectively. With these results the locations of the dominant electron capture heat sources in the outer crust of accreting neutron stars that exhibit super bursts are now experimentally constrained. We find the experimental Q value for the (66)Fe→(66)Mn electron capture to be 2.1 MeV (2.6σ) smaller than predicted, resulting in the transition occurring significantly closer to the neutron star surface.

Tube sigmoidostomy: a valuable alternative to sigmoidopexy for sigmoid volvulus

OBJECTIVE

To compare the effectiveness of tube sigmoidostomy and sigmoidopexy as effective treatment options for patients with acute uncomplicated sigmoid volvulus.

METHODS

The records of 72 patients with acute uncomplicated sigmoid volvulus with obstruction who were treated by tube sigmoidostomy (Group I: n=32) and sigmoidopexy (Group II: n=40) were reviewed retrospectively. Follow-up period was 22 months (range: 6-51 months).

RESULTS

Results show significant improvement in postoperative tachycardia, respiratory distress and urine output in Group I patients as compared to those in Group II. Most of the clinical parameters of Group I patients normalized by day 3, while it took up to 7 days in Group II patients. Intraabdominal hypertension caused by persistent colonic dilatation after sigmoidopexy was found to be an important determinant of postoperative morbidity. As compared to tube sigmoidostomy, the sigmoidopexy group had delayed recovery, more chances of abdominal fascial dehiscence, and longer hospital stay, as well as more prolonged abdominal discomfort, constipation, and recurrent volvulus rates during follow-up.

CONCLUSION

Tube sigmoidostomy provides both fixation and decompression of the redundant sigmoid colon in the postoperative period while allowing time to recover from massive dilatation and edema caused by prolonged volvulus. Compared with sigmoidopexy for the treatment of uncomplicated sigmoid volvulus, tube sigmoidostomy leads to lesser rates of morbidity and recurrence. Thus, it can be considered as a definitive alternative treatment option for uncomplicated sigmoid volvulus.

Survey of medical training in cytopathology carried out by the journal Cytopathology

This report of the Editorial Advisory Board of Cytopathology gives the results of a survey of medical practitioners in cytopathology, which aimed to find out their views on the current situation in undergraduate and postgraduate training in their institutions and countries. The results show that training in cytopathology and histopathology are largely carried out at postgraduate level and tend to be organized nationally rather than locally. Histopathology was regarded as essential for training in cytopathology by 89.5% of respondents and was mandatory according to 83.1%. Mandatory cytopathology sections of histopathology were reported by 67.3% and specific examinations in cytopathology by 55.4%. The main deficiencies in training were due to its variability; there were insufficient numbers of pathologists interested in cytology and a consequent lack of training to a high level of competence. Pathologists without specific training in cytopathology signed out cytology reports according to 54.7% of responses, more often in centres where training was 3-6 months or less duration. Although 92.2% of respondents thought that specialist cytology should not be reported by pathologists without experience in general cytopathology, that practice was reported by 30.9%, more often in centres with small workloads. The survey report recommends that 6-12 months should be dedicated to cytopathology during histopathology training, with optional additional training for those wanting to carry out independent practice in cytopathology. Formal accreditation should be mandatory for independent practice in cytopathology. When necessary, temporary placements to centres of good practice should be available for trainees intending to practise independently in cytopathology. There should be adequate numbers of pathologists trained in cytopathology to a high level of competence; some of their time could be released by training cytotechnologists and trainee pathologists to prescreen cytology slides and assess adequacy of fine-needle aspiration samples when immediate diagnosis was not required. The survey demonstrated a clear need for European and international guidelines for training in cytopathology.

An evaluation of ROME Camp: forgotten innovation in medical education

BACKGROUND AND OBJECTIVES

Mahatma Gandhi Institute of Medical Sciences (MGIMS), Sewagram, India's first rural medical institute, has been implementing its community-based public health teaching with the aim of building a physician workforce for the rural poor. For the past four decades, the MGIMS has organized and run the Re-orientation of Medical Education (ROME) camp for final year medical undergraduates at one of the rural centres of the department of Community Medicine. The objectives of the present study were to learn students' perceptions of the value and effectiveness of various components of the ROME camp and learn the factors they perceive facilitate and inhibit learning.

METHODS

A mixed-method research design of quantitative (survey) and qualitative (force field analysis) methods was used. The study participants were all 61 of the final year medical undergraduates participating in the ROME camp in 2008. The quantitative data was analyzed using SPSS software package and summative content analysis of the qualitative data was undertaken.

RESULTS

Students were generally very positive about all aspects of the camp and its component parts. The greatest consensus (88.9%, on a 0 to 100% scale) was for the contribution to student learning of the visit to the Primary health centre and Sub-centre, as offering direct exposure and interaction with the village-level service providers. There was poorer consensus for students' involvement with the field-based clinics, as this was felt by some not to contribute significantly to their understanding of socio-economic and environmental factors related to cases (78.8%) and their ability to diagnose health problems in resource poor settings (76.5%). The major strength of the camp was felt to be its exposure visits and hands-on experiences in surveys and interaction with village-level health care providers. Students reported poor interactions with teachers in some educational sessions, including the field-based clinics and classes on theories of national health programs.

CONCLUSIONS

The curriculum of the ROME camp was generally well regarded by students, but based on their views it should emphasize interactive theory sessions. The ROME scheme can be revitalized in all medical colleges as it is an effective practical approach for teaching public health principles and practice to medical students.

Newly developed WHO growth standards: implications for demographic surveys and child health programs

OBJECTIVE

To compare estimates of undernutrition based on the World Health Organization (WHO) Child Growth Standards ('WHO standards') and the National Center for Health Statistics NCHS/ WHO international growth reference ('NCHS reference') and discuss implications for child health programs and reporting of prevalence of underweight in demographic surveys.

METHODS

A cross-sectional study was carried out in 20 Anganwadi centers under Primary Health Centre, Anji. Total of 1491 under-six year children attending the Anganwadi centers were studied for nutritional status. Nutritional status was analyzed by NCHS standards by using EPI_INFO 6.04 software package and also by newly introduced WHO Child Growth Standards by Anthro 2005 software package. Chi-square test was used to compare the results.

RESULTS

According to WHO standards, the prevalence of underweight and severe underweight for children 0-6 year was 47.4% and 16.9% respectively. By NCHS reference, the overall prevalence of underweight and severe underweight for children 0-6 years was 53% and 15% respectively. The prevalence of underweight as assessed by WHO standards was significantly lower when compared with the assessment based on NCHS reference (p< 0.01). But, WHO standards gave higher prevalence of severe underweight than NCHS reference though the difference was not statistically significant (p>0.05).

CONCLUSION

In the light of newly developed WHO Child growth standards, all the nutrition-related indicators in demographic surveys like NFHS should now be derived using the WHO standards. There is need to reanalyze NFHS - I and NFHS - II data using WHO standards and findings should be made available so that it becomes comparable and trends over the years can be studied.

Relationship of anthropometric indicators with blood pressure levels in rural Wardha

BACKGROUND AND OBJECTIVES

Overweight and obesity are important determinants of health leading to adverse metabolic changes, including increase in blood pressure. Being overweight is associated with two- to six-fold increase in the risk of developing hypertension. Studies in urban Indian population showed strong relationship between different anthropometric indicators and blood pressure levels. Surprisingly, little is known about these relationships in rural population of India. The present study was carried out to examine the relationship between different anthropometric indicators and blood pressure levels in rural population of Wardha district in central India.

METHODS

This cross-sectional study was carried out in the areas of two Rural Health Training Centres (RHTC) of Department of Community Medicine, Mahatma Gandhi Institute of Medical Sciences, Sewagram; namely Bhidi and Anji through house-to-house visits. Two stage sampling method (30 cluster followed by systematic random) was used to reach the respondents' households. Partial correlation coefficients were used for continuous variables. Linear regression analysis was used to assess the influence of different anthropometric indicators on the systolic and diastolic blood pressure. ROC analysis was done to identify optimal cut-off values while likelihood ratios were calculated to identify the odds of having hypertension in comparison to those with lower values of anthropometric indicators.

RESULTS

The mean systolic blood pressures were 120.2 and 118.4 mmHg while the mean diastolic blood pressures were 77.7 and 76.3 mmHg in men and women respectively. There was a significant positive correlation of obesity indicators with both systolic and diastolic blood pressure. For SBP, the correlation coefficient was 0.23 with BMI, 0.23 with waist circumference, 0.11 with WHR and 0.22 with WHtR. For DBP, it was 0.13 with BMI, 0.12 with WC, 0.04 with WHR and 0.11 with WHtR. Step-wise linear regression suggested that BMI and WC were important predictors of hypertension. The suggested cut-off values for BMI were 21.7 for men and 21.2 for women; for waist circumference, the cut-offs were 72.5 for men and 65.5 for women.

INTERPRETATION AND CONCLUSION

BMI and WC had strong correlation with systolic and diastolic blood pressure. The suggested lower cut-off values of the anthropometric indicators will cover maximum of the population with higher odds of having hypertension and may help in reducing the mean population blood pressure levels.

Nutritional status of adolescents in rural Wardha

OBJECTIVE

The objective of the study was to study the nutritional status of adolescents in rural area of Wardha.

METHODS

The cross-sectional study was carried out in two PHC areas of Wardha district with two stage sampling method. In the first stage, cluster-sampling method was used to identify 30-clusters in each Rural Health Training Centre (RHTC) area separately. In the second stage, systematic random sampling method was used to identify 10 households per cluster. All adolescents in the household thus selected were included in the study. The mean body mass index (BMI) for age was used for classifying the nutritional status with CDC 2000 reference. Data thus generated was entered and analyzed using epi_info 2000.

RESULTS

Overall, 53.8% of the adolescents were thin, 44% were normal and 2.2% were overweight. The mean body mass index (BMI) for boys and girls was 16.88 and 15.54 respectively. The difference was statistically significant (p<0.05). The prevalence of thinness was significantly (p<0.05) higher in early adolescence, girls, lower education (<8th standard) and lower economic status.

CONCLUSION

Majority (53.8%) of the adolescents in this study area are thin and only 2.2% were overweight.

Distinct functions and cooperative interaction of the subunits of the transporter associated with antigen processing (TAP)

The ATP-binding cassette (ABC) transporter TAP translocates peptides from the cytosol to awaiting MHC class I molecules in the endoplasmic reticulum. TAP is made up of the TAP1 and TAP2 polypeptides, which each possess a nucleotide binding domain (NBD). However, the role of ATP in peptide binding and translocation is poorly understood. We present biochemical and functional evidence that the NBDs of TAP1 and TAP2 are non-equivalent. Photolabeling experiments with 8-azido-ATP demonstrate a cooperative interaction between the two NBDs that can be stimulated by peptide. The substitution of key lysine residues in the Walker A motifs of TAP1 and TAP2 suggests that TAP1-mediated ATP hydrolysis is not essential for peptide translocation but that TAP2-mediated ATP hydrolysis is critical, not only for translocation, but for peptide binding.

Heterologous expression of a mammalian epithelial sodium channel in yeast

The alpha and beta subunits of the amiloride-sensitive rat epithelial sodium channel (alpha beta ENaC) were expressed in the yeast Saccharomyces cerevisiae. We used a combination of yeast strains, including a mutant in the secretory pathway (sec6), and Western blotting techniques, to show that alpha beta ENaC was synthesized and targeted through the secretory system to the plasma membrane. Yeasts expressing alpha beta ENaC were more sensitive to salt than the parent strain. In addition, amiloride, a specific blocker of ENaC, was found to suppress salt sensitivity in the yeast strain expressing alpha beta ENaC.

Epitope-tagged constructs of the yeast plasma-membrane H(+)-ATPase

In this study, two different epitope tags (HA, c-myc) were introduced near the N terminus of the yeast PMA1 H(+)-ATPase. The resulting proteins were indistinguishable from the wild-type ATPase in their ability to travel through the secretory pathway, as judged by quantitative immunoblotting of isolated secretory vesicles. Furthermore, there were no significant abnormalities in ATPase activity (including K(m) for MgATP, Vmax, pH optimum, and IC50 for inhibition by vanadate) or in ATP-dependent proton pumping. Finally, the epitope-tagged ATPases could support normal growth and displayed the expected activation by glucose.

Awareness and health seeking behaviour of rural adolescent school girls on menstrual and reproductive health problems

A study was conducted on 130 girl students aged 13-17 years in Haryana to assess their awareness and health seeking behaviour regarding menstrual and reproductive health. Mean age at menarche of the girls was 13.6 +/- 0.83 years. Awareness about the process of menstruation was poor. Commonest reported menstrual problem was dysmenorrhoea (40.7%) followed by irregular menses (2.3%) of which only 5.3% consulted a doctor and 22.4% took over the counter medications from the chemist shops. Knowledge about normal duration of pregnancy and need for extra food during pregnancy was poor. Most of the girls knew about importance, duration of child spacing and need for three medical examinations during pregnancy. Major sources of information were television (73.1%), radio (37.1%) and parents (36.1%). Girls preferred to consult parents (49.2%) and doctors (44.6%) for help at times of having reproductive health problems. This study highlights the need for educating school girls about adolescent health, pregnancy and reproductive health problems through schools and parents by the health professionals.

Evidence for a salt bridge between transmembrane segments 5 and 6 of the yeast plasma-membrane H+-ATPase

The plasma-membrane H+-ATPase of Saccharomyces cerevisiae, which belongs to the P2 subgroup of cation-transporting ATPases, is encoded by the PMA1 gene and functions physiologically to pump protons out of the cell. This study has focused on hydrophobic transmembrane segments M5 and M6 of the H+-ATPase. In particular, a conserved aspartate residue near the middle of M6 has been found to play a critical role in the structure and biogenesis of the ATPase. Site-directed mutants in which Asp-730 was replaced by an uncharged residue (Asn or Val) were abnormally sensitive to trypsin, consistent with the idea that the proteins were poorly folded, and immunofluorescence confocal microscopy showed them to be arrested in the endoplasmic reticulum. Similar defects are known to occur when either Arg-695 or His-701 in M5 is replaced by a neutral residue (Dutra, M. B., Ambesi, A., and Slayman, C. W. (1998) J. Biol. Chem. 273, 17411-17417). To search for possible charge-charge interactions between Asp-730 and Arg-695 or His-701, double mutants were constructed in which positively and negatively charged residues were swapped or eliminated. Strikingly, two of the double mutants (R695D/D730R and R695A/D730A) regained the capacity for normal biogenesis and displayed near-normal rates of ATP hydrolysis and ATP-dependent H+ pumping. These results demonstrate that neither Arg-695 nor Asp-730 is required for enzymatic activity or proton transport, but suggest that there is a salt bridge between the two residues, linking M5 and M6 of the 100-kDa polypeptide.

Gastrointestinal leiomyomas in a developing country

Twenty one consecutive patients with leiomyoma of the gastrointestinal tract were studied. Recurrent gastrointestinal bleeding was found in 18 (85.7%) and recurrent intestinal obstruction in 3 (14.3%) patients. The commonest site of the lesion was the stomach followed by ileum, jejunum and duodenum. Barium meal examination and gastrointestinal endoscopy were suggestive of the diagnosis in 8 and angiography in 2 patients. The remaining patients were diagnosed peroperatively. All patients underwent excision and remained asymptomatic on follow up except two patients who had a recurrence of the tumor as leiomyosarcoma.

Effect of fenfluramine on serum T3, T4 and TSH levels in obesity

A prospective, randomised case-control trial of an anorectic drug, fenfluramine was conducted on 30 patients of simple obesity. The study revealed that the drug was well tolerated, non-toxic and effective in reducing the body weight and normalising the thyroid profile. Reduction in body weight, rise in serum thyroxine (T4) and fall in serum triiodothyronine (T3) was highly significant (p less than 0.01) in drug treated group as compared to controls (p less than 0.05) after 12 weeks of therapy. There was also fall in serum thyroid stimulating hormone (TSH) levels but without any statistical significance.

Effect of zinc ion on the interaction of some amino acid compounds of copper(II) with hydrogen peroxide

Reaction of elemental copper and zinc powder mixtures with glycine (NH2.CH2COOH; HA) or aspartic acid (NH2CHCOOHCH2COOH; H2B) (in 1:1:2 ratio, respectively) in the presence of excess hydrogen peroxide (H2O2) at 50 degrees C, results in the formation of a new mixed metal peroxy carbonate compound corresponding to formula [Cu(Zn)2(O2(2-) (CO3)2(H2O)4], while the same reaction with elemental copper powder alone yields merely peroxy amino acid compounds having the formula [Cu(O2(2-)) (HA)2(H2O)] and [Cu(O2(2-)) (H2B) (H2O)2] for glycine and aspartic acid, respectively. These compounds have been characterized by elemental analysis, ESR, and electronic and IR spectra. It is interesting to note that both amino acids are converted to carbonate in the presence of zinc alone. A method analogous to that described above, for the reaction of elemental copper, zinc powder mixtures with succinic acid [(CH2COOH)2] or acetic acid (CH3COOH) in excess H2O2, on the other hand, gave a product essentially comprising copper succinate or acetate, respectively. These observations suggest an interesting and perhaps important phenomenon by which only the simple amino acids such as glycine and aspartic acid are converted to carbonates while their corresponding carboxylic acids form only their respective salts.

Tropical pyomyositis in India: a clinico-histopathological study

Eighteen cases of tropical pyomyositis, aged 12-45 years, were seen over a 3-year period. There was clustering of cases in January, February and July to October. Male:female ratio was 14:4. Multiple muscular lesions (greater than 2) were common (67%). Extramuscular complications were present in 50% of the cases. Cardio-pulmonary involvement was most frequent. Muscle biopsies, done in 16 cases, showed suppurative changes (pus) in 15 cases and one case of non-suppurative myositis. Muscle necrosis, cellular infiltration with polymorphs and haemorrhage in-between muscle fibres were common.

Growth hormone response to clonidine in obese children

Basal and stimulated serum growth hormone (GH) levels after exercise, insulin induced hypoglycemia (IIH) and oral clonidine were evaluated in 20 (16 M, 4 F) normal statured obese (body mass index greater than or equal to 25 kg/M2) children. Basal serum GH levels (mean +/- SEM, 2.0 +/- 0.38 ng/ml) were not different from basal levels in non-obese children. The mean peak levels were 3.16 +/- 1.17 ng/ml, 2.15 +/- 0.36 ng/ml and 3.15 +/- 1.12 ng/ml (+/- SEM) after exercise, IIH and oral clonidine, respectively. The positive responses (peak level of serum GH greater than 7 ng/ml) were seen in 10% with exercise, in 10% with clonidine and in none with IIH test. These observations suggest that GH response to oral clonidine is subnormal in obese children.

Liver trauma (management in 105 consecutive cases)

One hundred and five consecutive patients who sustained liver trauma during the period from Jan 1986 to Dec 1988 are reviewed. Of these, 82 cases suffered from blunt abdominal injury while the rest had penetrating trauma. Simple hepatorrhaphy and use of topical hemostatic agents were the only modes of treatment for 76 cases, hepato-omentorrhaphy was used in 12 cases and hepatotomy with selective vascular ligation and resectional debridement were carried out in remaining 17 cases. Mortality was 36.2% (38/105), 30 patients died of shock in the perioperative period. Uncomplicated recovery occurred in 50 cases.

Cardiac changes in acute viral hepatitis in Varanasi (India): case reports

Three cases of acute viral hepatitis are reported with various cardiac changes such as transient left ventricular hypertrophy, myocarditis and progressive cardiomegaly (cardiomyopathy). Extra-hepatic manifestations of acute viral hepatitis are rare but have been well documented. The aims of the present study are to highlight the cardiac involvement in acute viral hepatitis and to report the clinical implications of cardiac changes in acute viral hepatitis.